FGD Sump System - Southern Company Plant Animations · PDF file2300.601.1 Safety Considerations 1. All Operating Companies Safety and Health Manuals shall be followed at all times

BWN-3/4-02300.601 Rev. 0 Process Description Plant Bowen

Date Printed 2/22/2011 Page 1 of 70

/s/ Gary Smith Approved Plant Review Board /s/ Tim Crump Approved Operations Manager /s/ Tim Banks Approved Plant Manager Date: 08-20-2010

PLANT BOWEN UNITS 3 & 4 FLUE GAS DESULFURIZATION SYSTEM

SCRUBBER SUMP SYSTEM PROCESS DESCRIPTION Document No. 2300.601

NOTE: If you are working with a printed copy of this document, it is NOT a Controlled Copy.

Please be sure to check online for the most recent revision.

BWN-3/4-02300.601 Rev 0


T able of C ontents

2300.601 PROCESS DESCRIPTION 3

2300.601.1 Safety Considerations 3 2300.601.2 Process Description 4

2300.601.2.1 Introduction 4 2300.601.2.2 System Components 16

2300.601.2.2.1 Sump System Mixers 17

2300.601.2.2.2 Ash Pond Transfer Sump Pumps (WW-PU-5480A & B) 21

2300.601.2.2.3 Ash Pond Transfer Sump Discharge Valves (WW-XV-5481A & B) 23

2300.601.2.2.4 Ash Pond Transfer Sump Pump Back Flush Valves (WW-XV-5482A & B) 25

2300.601.2.2.5 FGD Area Sump Pumps (WW-PU-5495A & B) 27 2300.601.2.2.6 FGD Area Sump Discharge Valves

(WW-XV-5496A & B) 30 2300.601.2.2.7 FGD Area Sump Pump Back Flush Valves

(WW-XV-5494A & B) 32 2300.601.2.2.8 Limestone Area Sump Pumps (WW-PU-5380A & B) 34 2300.601.2.2.9 Limestone Area Sump Discharge Valves

(WW-PU-5381A & B) 36 2300.601.2.2.10 Limestone Area Sump Pump Back Flush Valves

(WW-XV-5382A & B) 38 2300.601.2.2.11 Dewatering Sump Pumps (WW-PU-5390A & B) 40 2300.601.2.2.12 Dewatering Sump Discharge Valves

(WW-XV-5391A & B) 42 2300.601.2.2.13 Dewatering Area Sump Pump Back Flush Valves

(WW-XV-5392A & B) 44 2300.601.2.3 Summarized Controls Description 46 2300.601.2.4 Detailed Controls Description 50

2300.601.3 Process Flow Description 62 2300.601.4 Drawing References 65

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2300.601 PROCESS DESCRIPTION 2300.601.1 Safety Considerations

1. All Operating Companies Safety and Health Manuals shall be followed at all times.

2. The Southern Company Generation Clearance Procedure shall be followed at all times.

3. A thorough Job Safety Briefing (JSB) shall be completed before beginning work.

4. Employees should always use the proper Personal Protection Equipment (PPE) for the task they are performing.

5. Personnel must observe standard safety precautions when working around or with high temperature piping systems.

6. Personnel must be aware that components of this system are maintained in an automatic mode of operation. The equipment may start at any time without warning.

7. Personnel should remain clear of all rotating machinery, whether operating or in standby, at all times during unit operation.

8. Rotating machinery must never be placed in service without the appropriate equipment guards in place.

9. No attempt should be made to bypass or eliminate equipment safety interlocks. Doing so could result in equipment damage and possible injury to plant personnel.

10. Follow proper Confined Space Entry Procedures when entering confined spaces.

11. When employees are performing work on or associated with exposed lines or equipment energized at 50 volts or more, persons trained in First Aid including Cardiopulmonary Resuscitation (CPR), shall be available within 4 minutes per OSHA 1910.269 requirements.

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2300.601.2 Process Description 2300.601.2.1 Introduction

The Scrubber Sump System collects, stores, and transports waste water recovered from various areas throughout the FGD. The system consists primarily of four sumps, which are the Limestone Area Sump, the FGD Area Sump, the Dewatering Area Sump, and the Ash Pond Transfer Sump. The Limestone Area Sump, FGD Area Sump, and Dewatering Sump have the ability to either discharge their waste water contents back into the FGD process or to discharge their waste water contents into the Ash Pond Transfer Sump which, from there, the waste water will be discharged to the Ash Pond. Each sump contains two pumps for discharge of waste water and a mixer to prevent sedimentation of solids within the sump.

Limestone Area Sump

The limestone area sump receives a water or slurry stream collected by area trenches as result of flushing and draining of slurry pipelines, area cleaning, and spills. The sump is installed below grade and equipped with 2 pumps, one mixer and level indication instrumentation. The sump contents are either pumped to the limestone slurry transfer tank for recovery or to ash pond transfer sump if disposal is required.

Because the sump handles water that can include an appreciable amount of solids (>10%), the pipelines are equipped for automatic flushing. This installed automatic flushing dilutes the sump contents prior to pump start. This results in the pump casing and discharge piping being flushed. The sump pump discharge piping is equipped with a control valve from the make-up water system for this purpose.

The sump pumps are designed for corrosive duty with all wetted parts below the floor plate being rubber covered and/or lined. These are double suction pumps with semi-open impellers capable of being run dry. The flow rate is cut by about 60% once the sump level drops below the impeller.

The limestone area sump is controlled based on the sump’s liquid level. The sump is equipped with a continuous level measuring instrument providing local and remote indication. The figure below illustrates the level alarms and interlocks. The destination of the slurry discharged by the sump pumps is determined by the operator manipulating the manual valves in the pipeline.

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2300.601.2.1 Introduction

The sump mixers operate continuously regardless of sump level. Their operation is started and stopped by operator action via the DCS.

When in auto mode the DCS stops and starts sump pumps automatically without operator initiation. Starts are alternated between the two pumps in order to equalize run time. When one pump stops, a toggle switches to start the other pump next time. The operator also has the ability to toggle the pump selected for the next start.

When pump operation is stopped, the pump discharge valve is closed, the backflush valve remains open filling the sump and diluting the contents, performing a post flush.

Limestone Area Sump Interlocks and Alarms

High-High Alarms

High Starts Pump

Low Stops Pump

11 ft

10 ft

1.5 ft

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Sump Dimensions, W x L x H 10’ x 10’ x 12’

Sump Pumps Vertical Cantilever

Quantity 2

Flow Rate 250 gpm

Head 103 ft of H2O

Brake Horsepower 28 hp

Manufacturer & Model Weir Slurry (Galigher), 3SR4-5100x72

Casing 520 coated steel

Shaft 520 coated steel

Impeller 520 coated steel

Coating Rubber

Shaft Seal NA

Drive Poly chain

Pump Speed 1682 rpm

Motor Speed 1800 rpm max, 1750 rpm operating

Pump Motor hp 40 hp

Mixer top mounted

Manufacturer & Model Lightnin, 73Q5

Shaft Dimensions (D x L) 2.5“ x 126” FMB

Shaft Materials Carbon steel with 3/16” natural rubber coating

Impeller Type 1 impeller, 3 blades per impeller

Impeller Diameter 53”

Impeller Speed 55.8 rpm, 774.2 fpm

Impeller Materials Carbon steel w/ 3/16” natural rubber coating

Gearbox Lightnin, 73

Mixer Motor hp 5

Impeller Elevation 18” above sump floor

Minimum Sump Mixing Level 36” above sump floor

Adequate sump level to start mixer

62” above sump floor

Sump Inflows Area drains

Sump Outflows Limestone Area sump pump flow

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FGD Area Sump

The FGD area sumps receive a water or slurry stream collected by area trenches as a result of flushing and draining of slurry pipelines, area cleaning, and spills. They also receive the drains from the JBR outlet ducts and chimney flues. The FGD area sumps can be used to transfer gypsum slurry from one JBR to another for gypsum seeding. The sumps are installed below grade and equipped with 2 pumps, one mixer and level indication instrumentation. The sump contents are pumped to the respective ash pond transfer sump for disposal or to one of the JBRs, if recovery is desired. Units 1&2 are equipped with two of these sumps and Units 3&4 are provided with one.



The FGD area sumps are controlled based on the respective sump’s liquid level. Each sump is equipped with a continuous level measuring instrument providing local and remote indication. Two sump pumps are provided for each sump. One is operating and one is stand-by. The selected sump pump starts upon a sump high level and stops upon a sump level of 1.5’. The stand-by pump starts automatically on the trip of the primary pump.

The operator is given a high-high level alarm. The figure below illustrates these alarms and interlocks. The sump pump discharge destination is determined by manual valves installed in the pipeline.

When in auto mode the DCS stops and starts sump pumps automatically without operator initiation Starts are alternated between the two pumps in order to equalize run time. When one pump stops, a toggle switches to start the other pump next time. The operator also has the ability to toggle the pump selected for the next start.


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FGD Area Sump


FGD Area Sump Interlocks and Alarms

High-High Alarms

High Starts Pump

Low Stops Pump

11 ft

10 ft

1.5 ft

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Quantity 1 Sump Dimensions, W x L x H 10’ x 10’ x 12’ Sump Pumps Vertical Cantilever Quantity 2 per sump Flow Rate 250 gpm Head 86 ft of H2O Brake Horsepower 23 hp Manufacturer & Model Weir Slurry (Galigher), 3SR4-5100x72 Casing 520 coated steel Shaft 520 coated steel Impeller 520 coated steel Coating rubber Shaft Seal NA Drive Poly chain Pump Speed 1548 rpm Motor Speed 1800 rpm max, 1750 rpm operating Pump Motor hp 30 hp Mixer top mounted Manufacturer & Model Lightnin, 73Q5 Shaft Dimensions (D x L) 2.5“ x 126“ FMB Shaft Materials Carbon steel w/ 3/16” natural rubber coating Impeller Type 1 impeller, 3 blades per impeller Impeller Diameter 53” Impeller Speed 55.8 rpm, 774.2 fpm Impeller Materials Carbon steel w/ 3/16” natural rubber coating Gearbox Lightnin, 73 Mixer Motor hp 5 Impeller Elevation 18” above sump floor Minimum Sump Mixing Level 36” above sump floor Adequate sump level to start mixer 62” above sump floor Sump Inflows Area drains, duct drains, chimney flue drains Sump Outflows FGD area sump pump flow

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Dewatering Area Sump The dewatering area sump receives the hydrocyclone overflow stream as well as streams collected by area trenches as result of flushing and draining of slurry pipelines, area cleaning, and spills. The sump size is identical to the ash pump transfer sump. The sump meets the minimum size requirements of HEI standards. The sump is installed below grade and equipped with 2 pumps, one mixer and level indication instrumentation. The sump contents are either pumped to the ash pond transfer sump for disposal or to one of the return water tanks if recovery is desired. These pumps are sized to serve all four units.



The dewatering area sump is controlled based on the sump’s liquid level. The sump is equipped with a continuous level measuring instrument providing local and remote indication. Two sump pumps are provided for each sump - one is operating and one is stand-by. The selected sump pump starts upon a sump high level and stops upon a sump level of 1.5’. The stand-by pump starts automatically on the trip of the primary pump. The operator is given a high-high level alarm. The figure below illustrates the alarms and interlocks associated with the sump level. The sump pump discharge destination is determined by manual valves installed in the pipeline. When in auto mode the DCS stops and starts sump pumps automatically without operator initiation. Starts are alternated between the two pumps in order to equalize run time. When one pump stops, a toggle switches to start the other pump next time. The operator also has the ability to toggle the pump selected for the next start. The sump mixers operate continuously regardless of sump level. Their operation is started and stopped by operator action via the DCS.

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Dewatering Area Sump


Dewatering Area Sump Interlocks and Alarms

High-High Alarms

High Starts Pump

Low Stops Pump

11 ft

10 ft

1.5 ft

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Sump Dimensions, W x L x H 16’ x 16’ x 12’

Sump Pumps Vertical Cantilever

Quantity 2

Flow Rate 3150 gpm

Head 95 ft of H2O

Brake Horsepower 205 hp

Pump Manufacturer & Model Weir Slurry, 12SRA-5100 x 96

Casing 520 rubber covered steel

Shaft 520 rubber coated steel

Impeller Stainless Steel Alloy

Coating rubber

Shaft Seal NA

Drive Polychain

Pump Speed 655 rpm

Motor Speed 780 rpm

Pump Motor hp 250 hp

Mixer top mounted

Manufacturer & Model Lightnin, 73Q5

Shaft Dimensions (D x L) 2.5“ x 126“ FMB

Shaft Materials Carbon steel w/ 3/16’ natural rubber

Impeller Type 1 impeller, 3 blades per impeller

Impeller Diameter 53”

Impeller Speed 55.8 rpm, 774.2 fpm

Impeller Materials Stainless Steel Alloy

Gearbox Lightnin, 73

Mixer Motor hp 5

Impeller Elevation 18” above sump floor

Minimum Sump Mixing Level 36” above sump floor

Adequate sump level to start mixer 62” above sump floor Sump Inflows Hydrocyclone overflow, area drains

Sump Outflows Dewatering Area Sump pump flow to APT Sump or return water tank

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Ash Pond Transfer Sump

The Ash Pond Transfer (APT) Sumps receive FGD associated streams for disposal to the ash pond. The Units 3&4 APT Sump receives a stream from the gypsum dewatering hydrocyclone overflow collected by the dewatering area sump. The APT Sumps are designed to collect the gypsum draw-off stream from two JBRs when a gypsum transfer tank is not available. Direct drains, hard-piped from the JBRs to the APT Sump can be utilized for expedient draining of JBRs to the ash pond. The basis for the sump size is a maximum of four pump starts in one hour based on the maximum flow from the dewatering area sump plus approximately 1000 gpm per JBR when draining. The sump is installed below grade and equipped with 2 pumps, one mixer, and level indication instrumentation. Units 1&2 are equipped with one of these sumps as are Units 3&4.

Because the sump handles water that can include an appreciable amount of solids (>10%), the pipelines are equipped for automatic flushing. This installed automatic flushing dilutes the sump contents prior to pump start. This results in the pump casing and discharge piping being flushed. The sump pump discharge piping is equipped with a control valve from the make-up water system for this purpose. Additionally, The Unit 3/4 Ash Pond Transfer Sump discharge piping is equipped with a manually operated valve off of the make-up water system for the purpose of flushing the discharge piping.

The sump pumps are designed for corrosive duty with all wetted parts below the floor plate being rubber covered and/or lined. These are double suction pumps with semi-open impellers capable of being run dry. The flow rate is cut by about 60% once the sump level drops below the impeller. The ash pond transfer (APT) sumps are controlled based on the respective sump’s liquid level. Each sump is equipped with a continuous level measuring instrument providing local and remote indication. Two sump pumps are provided for each sump. One is operating and one is stand-by. The selected sump pump starts upon a sump high level and stops upon a sump level of 1.5’. The stand-by pump starts automatically on the trip of the primary pump. The operator is given a high-high level alarm. The figure below illustrates these alarms and interlocks. When in auto mode the DCS stops and starts sump pumps automatically without operator initiation. Starts are alternated between the two pumps in order to equalize run time. When one pump stops, a toggle switches to start the other pump next time. The operator also has the ability to toggle the pump selected for the next start.

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Ash Pond Transfer Sump

The sump mixers operate continuously regardless of sump level. Their operation is started and stopped by operator action via the DCS. When pump operation is stopped, the pump discharge valve is closed, the backflush valve remains open filling the sump and diluting the contents, performing a post flush.

Ash Pond Transfer Sump Level Alarms & Interlocks

High-High Alarms

High Starts Pump

Low Stops Pump

11 ft

10 ft

1.5 ft

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Quantity 1 Sump Dimensions, W x L x H 16’ x 16’ x 12’ Sump Pumps Vertical Cantilever Quantity 2 per sump Flow Rate 3500 gpm Head 82 ft of H2O Brake Horsepower hp Pump Manufacturer & Model Weir Slurry (Galigher), 125RA-5100 x 96 Casing 520 rubber coated steel Shaft 520 rubber coated steel Impeller Stainless Steel Alloy steel Coating rubber Shaft Seal NA Drive Polychain Pump Speed 649 rpm Motor Speed 1780 rpm operating Pump Motor hp 250 hp Mixer top mounted Manufacturer & Model Lightnin, 73Q5 Shaft Dimensions (D x L) 2.5“ x 178” FMB Shaft Materials Carbon steel w/ 3/16” natural rubber Impeller Type 1 impeller, 3 blades per impeller Impeller Diameter 53” Impeller Speed 55.8 rpm, 774.2 fpm Impeller Materials Stainless Steel Alloy Gearbox Lightnin, 73 Mixer Motor hp 5 Impeller Elevation 18” above sump floor Minimum Sump Mixing Level 36” above sump floor Adequate sump level to start mixer


Sump Inflows Dewatering area sump, FGD area sump, limestone area sump, gypsum draw-off, JBR direct drains

Sump Outflows APT Sump pump flow to ash pond

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2300.601.2.2 System Components

The Scrubber Sump System consists of Ash Pond Transfer Sump Mixer, Ash Pond Transfer Sump Pumps, Ash Pond Transfer Sump Pump Discharge Control Valves, FGD Area Sump Mixer, FGD Area Sump Pumps, FGD Area Sump Pump Discharge Control Valves, Limestone Area Sump Mixer, Limestone Area Sump Pumps, Limestone Area Sump Pump Discharge Control Valves, Dewatering Area Sump Mixer, Dewatering Area Sump Pumps, and Dewatering Area Sump Pump Discharge Control Valves.

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2300.601.2.2.1 Sump System Mixers

Number Sheet Rev Title P&IDs

• D1M20045 1 3 FGD Project – P&ID – Limestone Area and Dewatering Area Sumps

• D3M20046 1 3 FGD Project – P&ID – FGD Area and Ash Pond Transfer Sumps

Vendor O&M Manuals

• S82436 1 A Scrubber - FGD - Agitator - 10' X 10 Sumps Ball Mill/JBR - Mixer Installation Operation & Maintenance Manual

• S82437 1 A Scrubber - FGD - Agitator - 16' X 16' Sumps Dewater/Ashpond - Mixer Installation, Operation & Maintenance Manual

• S82438 1 A Scrubber - FGD - Agitator - JBR Absorber Agitators - Mixer Installation, Operation & Maintenance Manual

• S80756 1 0 Scrubber - FGD - Mixer Installation & Storage Instruction Manual

• S80629 1 D Scrubber – Ball Mill / JBR Sump Agitator – General Arrangement

• S80547 0 Scrubber - FGD - Agitator - Assembly Drawing - Axial Flow Impeller

F unc tion

The Sump System Mixers (WW-MX-5480, WW-MX-5495, WW-MX-5380, and WW-MX-5390) serve to prevent solids suspended in solution from settling into the bottom of the sumps, thereby maintaining a homogenous mixture from which the Sump Pumps for each respective system can draw a suction. Des c ription

Mixer The Sump System Mixers are Model Number 73Q5 manufactured by Lightnin Mixers and Aerators. The Sump System Mixers are identical in design for each sump with the exception of Mixer shaft length since each sump is of varying size. The mechanical components of the mixer consist of a fluid coupling Model Number HF10/20 manufactured by Faulk Industries, a double reduction gear Model Number 73 manufactured by Lightnin Mixers and Aerators, and a mixer shaft and impeller manufactured by Lightnin Mixers and Aerators. The mixer shaft and impeller are coated with a 3/16” layer of natural rubber to minimize corrosion and wear. Additionally, the leading edge of the impeller is coated with an additional 3/16” of natural rubber for added protection.

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Mixer top mounted Manufacturer & Model Lightnin, 73Q5 Shaft Dimensions (D x L) 2.5“ x 178” FMB (Ash Pond Sump) Shaft Dimensions (D x L) 2.5“ x 126“ FMB (Dewatering Sump)

Shaft Dimensions (D x L) 2.5“ x 126“ FMB (FGD Sump) Shaft Dimensions (D x L) 2.5“ x 126” FMB (Limestone Sump)

Shaft Materials Carbon steel w/ 3/16” natural rubber Impeller Type 1 impeller, 3 blades per impeller Impeller Diameter 53” Impeller Speed 55.8 rpm, 774.2 fpm Impeller Materials Carbon steel w/ 3/16” natural rubber coating Gearbox Lightnin, 73 Mixer Motor hp 5 Impeller Elevation 18” above sump floor Minimum Sump Mixing Level 36” above sump floor Adequate sump level to start mixer


Mixer Drive Assembly

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Impeller The mixer Impeller is manufactured by Lightnin, model 73Q5. Each impeller is a 53” carbon steel with three blades, rated at 55.8 rpm, 774.2 fpm.

Typical Impeller Side and Bottom View

Motor The mixer motor is a horizontally mounted, squirrel cage induction motor manufactured by Siemens. The motor is a 3-Phase Induction motor producing 5 hp at 460V AC. The motor is of frame size 184T with a TEFC enclosure and Model Number 1LA01844ES21.

Typical S ump Mixer Motor

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2300.601.2.2.2 Ash Pond Transfer Sump Pumps (WW-PU-5480A & B)



Vendor O&M Manuals

• S93767 1 0 Scrubber - Flue Gas Desulfurization - Ash Pond Transfer Sump Pump - Installation, Operation & Maintenance Manual

• S82495 1 A Scrubber - Flue Gas Desulfurization - Connection Diagram - Ash Pond Transfer Sump Pumps

• S84391 1 0 Scrubber - FGD - Ash Pond Transfer Sump Pump & Dewatering Area Sump Pump - Acid Proof Components Drawing

• S82491 1 A Scrubber - Flue Gas Desulfurization - Nameplate - Ash Pond Transfer Sump Pumps

F unc tion

The Ash Pond Transfer (APT) Sumps receive FGD associated streams for disposal to the station’s ash pond. The Units 3&4 APT Sump receives a stream from the gypsum dewatering hydrocyclone overflow collected by the dewatering area sump. The APT Sumps are designed to collect the gypsum draw-off stream from two JBRs when a gypsum transfer tank is not available. Direct drains, hard-piped from the JBRs to the APT Sump can be utilized for expedient draining of JBRs to the ash pond.

Description Pump The Ash Pond Transfer Sump Pump is manufactured by by Weir and is Model Number 12SRA-5100 x 84. Design flow for the pumps is 3500 gpm at an operating head of 92 ft. with impeller speed at 648 rpm. These design parameters result in a 50.8% efficiency when an input of 214.8 hp is applied.

The sump pumps are designed for corrosive duty with all wetted parts below the floor plate being rubber covered and/or lined. These are single suction pumps with semi-open impellers are capable of being run dry. The flow rate is cut by about 60% once the sump level drops below the impeller.

Ash Pond Transfer Sump Pump

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2300.601.2.2.2 Ash Pond Transfer Sump Pumps (WW-PU-5480A & B)

Ash Pond Transfer Sump Pump

Motor The Ash Pond Transfer Sump Pump motor is a vertically mounted, squirrel cage induction motor manufactured by TECO-Westinghouse. The motor is a 3-Phase Induction motor producing 250 hp at 480V AC. The motor is frame size 449T with a TEFC enclosure.

Ash Pond Transfer Sump Pump Motor

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2300.601.2.2.3 Ash Pond Transfer Sump Discharge Valves (WW-XV-5481A & B)



Vendor O&M Manuals

• S83513 1 0 FGD - Scrubber - KGA Slurry Valve - Installation, Maintenance & Operating Instructions

• S94233 1 0 FGD - Scrubber - Flow Control Valves - General Arrangement KGA16-BG3-B6B10D7H07L6N3

F unc tion

The Ash Pond Transfer Sump Pumps 16" Discharge Control Valves serve to isolate the discharge side of the Ash Pond Transfer Sump Pumps when required.

Description The Ash Pond Transfer Sump discharge valves are 16” Knife Gate Valves manufactured by Clarkson, model KGA16. The body of the valve a cast ductile iron with a SAF 2507 stainless steel knife gate with fully lined gum rubber sleeves. The valves have an oversized air cylinder actuator which is double acting and fails in the last position. The actuator is controlled by ASCO 4-way dual solenoid valve which requires air to open and air to close with manual override.

The KGA is a packing less knife gate valve. All the sealing is accomplished by the elastomeric sleeves in the valve housing. The sleeves also form the wear section for the valve. Actuation of the valve slides a stainless steel gate between the sleeves to shut off the flow. Some seepage may occur during opening and closing cycles. The gate is removable for inspection or replacement while the valve is in service.

It is normal for the KGA valves to discharge media during opening and closing cycles. This purges solids from between the sleeves that would prevent a tight seal when the valve is fully open or closed. With the optional splashguard mounted on, the valve, the valve’s internal chamber is more than adequate to receive the discharge which can then be drained or, flushed into a sump or launder through an attached pipe or hose.

KGA valve maintenance may require occasional gate lubrication depending on the application. A silicone-based lubricant is recommended. Lubrication fittings are located on the square center flange of the valve housing. The gate may also be lubricated by spraying directly with a silicone lubricant to prevent scale build-up. Sleeve wear can be minimized if the valve gate is scraped or wiped clean occasionally.

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The application of lubricant should include liberally coating the entire seal end of the sleeve. A thin film should also be applied to the outer diameter of the sleeve. Apply a thin film of lubricant to both faces of the knife gate from the knife edge upward to the center of the gate. Periodic re-lubrication using the fittings on the housing should minimize any operational problems in normal use.

As a minimum, the Clarkson KGA valves should be lubricated every 100 strokes for 3”-10” sizes and every 50 strokes for 12”-54”sizes. An individual application may require more or less frequent lubrication depending on the process and chemistry. If a valve cycles very infrequently, less than once per month, lubrication prior to each stroke is recommended.

For dry material handling service, liquid or grease type lubricants should not be used. A ‘dry film spray” lubricant may be used. Examples are: graphite, Teflon or silicone sprays.

Typical Clarkson Knife Gate Valve

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2300.601.2.2.4 Ash Pond Transfer Sump Pump Back Flush Valves

(WW-XV-5482A & B)



Vendor O&M Manuals

• 1 0 FGD - Scrubber – Fabri-Valve - Installation, Maintenance & Operating Instructions

• 1 0 FGD - Scrubber - Flow Control Valves - General Arrangement Fabri-Valve, model XS150

F unc tion

The Ash Pond Transfer Sump Pumps 4" Backflush Control Valves serve to control the flow of backflush water from the Make-Up Water System to the discharge piping of the respective Ash Pond Transfer Sump Pump.

Description The Ash Pond Transfer Sump Backflush Control valves are 4” Knife Gate Valves manufactured by Fabri-Valve, model XS150. The body of the valve carbon steel with a SAF 2507 stainless steel knife gate with fully lined red urethane sleeves. The valves have an air cylinder actuator to open and a spring close and fails in the closed position. The actuator is controlled by ASCO EFHT8316G64MO solenoid valve which requires air to open.

The Fabri-Valve utilizes a seal that wraps around the entire gate eliminating leakage paths. The chest seal completely encloses gate with a injectable packing; therefore, contamination of the process fluid from “loose” packing is eliminated. The body protects the perimeter seal from the rigors of the direct process flow.

A reliable body joint eliminates the possibility of body joint leakage caused by pipe stresses. The design of the gate guides guarantee that the gate is properly positioned and supported during operation. The gate guides do not reduce the flow area. Dual scraper blades clean gate during operation and protect the seals from abrasives. A taper to the body’s internal diameter is to eliminate the possibility of material collecting at the bottom of the port and preventing proper closure. This taper ensures automatic “clean-out” and “flushing”. Minimized chest area and close tolerances prevents minimizes packing.

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Typical Fabri-Valve Gate Valve model XS150

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2300.601.2.2.5 FGD Area Sump Pumps (WW-PU-5495A & B)



Vendor O&M Manuals

• S80694 1 B Scrubber - Flue Gas Desulfurization - Component Drawing - FGD Area Sump Pump

• S82779 1 A Scrubber - Flue Gas Desulfurization - Motor Outline - FGD Area Sump Pump

• S82780 1 0 Scrubber - Flue Gas Desulfurization - Performance Data - FGD Area Sump Pump

• S82782 1 0 Scrubber - Flue Gas Desulfurization - Performance Data - FGD Area Sump Pump Motor

F unc tion

The Unit 3/4 FGD area sumps receive a water or slurry stream collected by area trenches as result of flushing and draining of slurry pipelines, area cleaning, and spills. They also receive the drains from the JBR outlet ducts and chimney flues. The Unit 3/4 FGD area sumps can be used to transfer gypsum slurry from one JBR to another for gypsum seeding. The sumps are installed below grade and equipped with 2 pumps, one mixer and level indication instrumentation. The sump contents are pumped to the respective ash pond transfer sump for disposal or to one of the JBRs if recovery is desired

Description Pump The Unit 3/4 FGD Area Sump Pumps are manufactured by Galigher and are Model Number 3SR4-5100x72 Vertical Pump. Design flow for the pumps is 250 gpm at an operating head of 86 ft. with impeller speed at 1548 rpm. These design parameters result in a 31.7% efficiency when an input of 22.9 hp is applied.


BWN-3/4-02300.601 Rev 0



Unit 3/4 FGD Area Sump Pump

FGD Area Sump Pumps

BWN-3/4-02300.601 Rev 0



Motor The Unit 3/4 FGD Area Sump Pump motor is a vertically mounted, squirrel cage induction motor manufactured by TECO-Westinghouse. The motor is a 3-Phase Induction motor producing 30 hp at 460V AC. The motor is frame size 286T with a TEFC enclosure.

Typical TECO-Westinghouse Motor

BWN-3/4-02300.601 Rev 0


2300.601.2.2.6 FGD Area Sump Discharge Valves (WW-XV-5496A & B)



Vendor O&M Manuals


• S94229 0 FGD - Scrubber - Flow Control Valves - General Arrangement KGA4-MH-B6B10D7H07L6N3R1

F unc tion

The FGD Area Sump Pumps 4” Discharge Control Valves serve to isolate the discharge side of the FGD Area Sump Pumps when required.

Description

The Unit 3/4 FGD Area Sump discharge Valves are 4” Knife Gate valves manufactured by Clarkson, model KGA4. The body of the valve a cast ductile iron with a SAF 2507 stainless steel knife gate with fully lined gum rubber sleeves. The valves have an oversized air cylinder actuator which is double acting and fails in the last position. The actuator is controlled by ASCO 4-way dual solenoid valve which requires air to open and air to close with manual override. The KGA is a packing less knife gate valve. All the sealing is accomplished by the elastomeric sleeves in the valve housing. The sleeves also form the wear section for the valve. Actuation of the valve slides a stainless steel gate between the sleeves to shut off the flow. Some seepage may occur during opening and closing cycles. The gate is removable for inspection or replacement while the valve is in service.



BWN-3/4-02300.601 Rev 0


2300.601.2.2.6 FGD Area Sump Discharge Valves (WW-XV-5496A & B)





BWN-3/4-02300.601 Rev 0


2300.601.2.2.7 FGD Area Sump Pump Back Flush Valves (WW-XV-5494A & B)



Vendor O&M Manuals



F unc tion

The FGD Area Sump Pumps 4" Backflush Control Valves serve to control the flow of backflush water from the Make-Up Water System to the discharge piping of the respective FGD Area Sump Pump.

Description The FGD Area Sump Backflush Control valves are 4” Knife Gate Valves manufactured by Fabri-Valve, model XS150. The body of the valve carbon steel with a SAF 2507 stainless steel knife gate with fully lined red urethane sleeves. The valves have an air cylinder actuator to open and a spring close and fails in the closed position. The actuator is controlled by ASCO EFHT8316G64MO solenoid valve which requires air to open.



BWN-3/4-02300.601 Rev 0


2300.601.2.2.7 FGD Area Sump Pump Back Flush Valves (WW-XV-5494A & B)


BWN-3/4-02300.601 Rev 0


2300.601.2.2.8 Limestone Area Sump Pumps (WW-PU-5380A & B)



Vendor O&M Manuals

• S80693 1 A Scrubber - Flue Gas Desulfurization - Arrangement Drawing - Foundation Loads - Mill Area Sump Pumps

• S80786 1 A Scrubber - Flue Gas Desulfurization - Curve - Mill Area Sump Pump

• S82781 1 A Scrubber - Flue Gas Desulfurization - Motor Outline - Mill Area Sump Pump Motor

• S92425 1 0 Scrubber - Flue Gas Desulfurization - Installation, Operation & Maintenance Manual - Mill Area Pumps

F unc tion

The Unit 1-4 Limestone Area Sump Pump A & B serve to extract waste water volume from the Unit 1-4 Limestone Sump and either send that waste water to the Ash Pond Transfer Sump or recycle the waste water back into the Limestone Slurry Transfer process. The normal alignment is to send the waste water volume to the Ash Pond Transfer Sump.

Description

The Unit 1-4 Limestone Area Sump Pumps are manufactured by Galigher and are Model Number 3SR4-5100x72 Vertical Pump. Design flow for the pumps is 250 gpm at an operating head of 86 ft. with impeller speed at 1548 rpm. These design parameters result in a 31.7% efficiency when an input of 22.9 hp is applied.

The sump pumps are designed for corrosive duty with all wetted parts below the floor plate being rubber covered and/or lined. These are double suction pumps with semi-open impellers capable of being run dry.

Limestone Area Sump Pump

BWN-3/4-02300.601 Rev 0


2300.601.2.2.8 Limestone Area Sump Pumps (WW-PU-5380A & B)

Motor The Unit 1-4 Limestone Area Sump Pump motor is a vertically mounted, squirrel cage induction motor manufactured by TECO-Westinghouse. The motor is a 3-Phase Induction motor producing 40 hp at 460V AC. The motor is frame size 324T with a TEFC enclosure.


Limestone Area Sump Pumps

BWN-3/4-02300.601 Rev 0


2300.601.2.2.9 Limestone Area Sump Discharge Valves (WW-PU-5381A & B)



Vendor O&M Manuals


• S94229 1 0 FGD - Scrubber - Flow Control Valves - General Arrangement KGA4-MH-B6B10D7H07L6N3R1

F unc tion

The Limestone Area Sump Pumps 4" Discharge Control Valves serve to isolate the discharge side of the Limestone Area Sump Pumps when required.

Description The Unit 3/4 FGD Area Sump discharge valves are 4” Knife Gate Valves are manufactured by Clarkson, model KGA4. The body of the valve a cast ductile iron with a SAF 2507 stainless steel knife gate with fully lined gum rubber sleeves. The valves have an oversized air cylinder actuator which is double acting and fails in the last position. The actuator is controlled by ASCO 4-way dual solenoid valve which requires air to open and air to close with manual override.




BWN-3/4-02300.601 Rev 0


2300.601.2.2.9 Limestone Area Sump Discharge Valves (WW-PU-5381A & B)





BWN-3/4-02300.601 Rev 0


2300.601.2.2.10 Limestone Area Sump Pump Back Flush Valves

(WW-XV-5382A & B)



Vendor O&M Manuals



F unc tion

The Limestone Area Sump Pumps 4" Backflush Control Valves serve to control the flow of backflush water from the Make-Up Water System to the discharge piping of the respective Limestone Area Sump Pump.

Description The Limestone Area Sump Backflush Control valves are 4” Knife Gate Valves manufactured by Clarkson. The body of the valve a cast ductile iron with a SAF 2507 stainless steel knife gate with fully lined gum rubber sleeves. The valves have an oversized air cylinder actuator which is double acting and fails in the last position. The actuator is controlled by ASCO 4-way dual solenoid valve which requires air to open and air to close with manual override.




BWN-3/4-02300.601 Rev 0


2300.601.2.2.10 Limestone Area Sump Pump Back Flush Valves

(WW-XV-5382A & B)





BWN-3/4-02300.601 Rev 0


2300.601.2.2.11 Dewatering Sump Pumps (WW-PU-5390A & B)



Vendor O&M Manuals

• S93766 1 0 Scrubber - Flue Gas Desulfurization - Dewatering Area Sump Pump - Installation, Operation & Maintenance Manual

• S82519 1 0 Scrubber - Flue Gas Desulfurization - Dewatering Area Sump Pump Acid Proof Components Drawing

• S82482 1 0 Scrubber - Flue Gas Desulfurization - Curves - Nameplate - Dewatering Area Sump Pumps

F unc tion

The Dewatering area sump receives the hydrocyclone overflow stream as well as streams collected by area trenches as result of flushing and draining of slurry pipelines, area cleaning, and spills. The sump contents are either pumped to the ash pond transfer sump for disposal or to one of the return water tanks if recovery is desired.

Description

The Dewatering Sump Pump is manufactured by Weir and is Model Number 12SRA-5100 x 84. Design flow for the pumps is 3500 gpm at an operating head of 92 ft. with impeller speed at 648 rpm. These design parameters result in a 50.8% efficiency when an input of 214.8 hp is applied.

The sump pumps are designed for corrosive duty with all wetted parts below the floor plate being rubber covered and/or lined. These are single suction pumps with semi-open impellers capable of being run dry

Dewatering Sump Pump

BWN-3/4-02300.601 Rev 0


2300.601.2.2.11 Dewatering Sump Pumps (WW-PU-5390A & B)

Motor The Dewatering Sump Pump motor is a vertically mounted, squirrel cage induction motor manufactured by TECO-Westinghouse. The motor is a 3-Phase Induction motor producing 250 hp at 460V AC. The motor is frame size 5007 with a TEFC enclosure.


Limestone Area Sump Pumps

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2300.601.2.2.12 Dewatering Sump Discharge Valves (WW-XV-5391A & B)



Vendor O&M Manuals



F unc tion

The Dewatering Sump Pumps 16" Discharge Control Valves serve to isolate the discharge side of the Dewatering Sump Pumps when required.

Description

The Dewatering Sump discharge valves are 16” Knife Gate valves manufactured by Clarkson, model KGA16. The body of the valve a cast ductile iron with a SAF 2507 stainless steel knife gate with fully lined gum rubber sleeves. The valves have an oversized air cylinder actuator which is double acting and fails in the last position. The actuator is controlled by ASCO 4-way dual solenoid valve which requires air to open and air to close with manual override. Below is an illustrative example of the Clarkson Knife Valve.




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2300.601.2.2.12 Dewatering Sump Discharge Valves (WW-XV-5391A & B)





BWN-3/4-02300.601 Rev 0


2300.601.2.2.13 Dewatering Area Sump Pump Back Flush Valves

(WW-XV-5392A & B)


• D3M20046 1 3 FGD Project – P&ID – Ash Pond Transfer Sump Vendor O&M Manuals



F unc tion

The Gypsum Dewatering Area Sump Pumps 4" Backflush Control Valves serve to control the flow of backflush water from the Make-Up Water System to the discharge piping of the respective Ash Pond Transfer Sump Pump.

Description The Gypsum Dewatering Area Sump Backflush Control valves are 4” Knife Gate Valves manufactured by Fabri-Valve, model XS150. The body of the valve carbon steel with a SAF 2507 stainless steel knife gate with fully lined red urethane sleeves. The valves have an air cylinder actuator to open and a spring close and fails in the closed position. The actuator is controlled by ASCO EFHT8316G64MO solenoid valve which requires air to open.



BWN-3/4-02300.601 Rev 0


2300.601.2.2.13 Dewatering Area Sump Pump Back Flush Valves

(WW-XV-5392A & B)


BWN-3/4-02300.601 Rev 0


2300.601.2.3 SUMMARIZED CONTROLS DESCRIPTION

Limestone Area Sump

The Limestone Area Sump consists of a sump mixer, two sump pumps with associated discharge control valves and two level transmitters.

Alarms generated by the DCS are High Sump Level at >11’, Sump Pump A/B Discharge Control valve fail to open/fail to close/wrong position, sump level transmitter deviation, sump mixer motor current abnormal, sump mixer motor tripped, and start sump mixer.

A minimum level of 5.2’ is required to automatically start the sump mixer.

One of the two sump pumps can be placed in lead and that sump pump will run whenever the sump level is >10’.

Each Limestone Area Sump Pump is equipped with an automatic pump back flush valve. If Limestone Area Sump Level is above 10 feet, or neither Limestone Area Sump Pump A or B is running for >60 seconds, an OPEN command will be issued to open the Back Flush Valve. If Limestone Area Sump Level is < 10 feet for >60 seconds, or either Limestone Area Sump Pump A or B is running for >60 seconds, the OPEN command will be reset closing the Back Flush Valve.

Each sump pump’s discharge control valve will open whenever that pump is running and will not close if that pump is running. Once the pump is deenergized, the valve will close.

The limestone area sump is controlled based on the sump’s liquid level. The sump is equipped with a continuous level measuring instrument providing local and remote indication. The destination of the slurry discharged by the sump pumps is determined by the operator from the settings of manual valves in the pipeline.

When in auto mode the DCS stops and starts sump pumps automatically without operator initiation. Sump mixer operation is continuous regardless of level. Starts are alternated between the two pumps in order to equalize run time. When one pump stops, a toggle switches to start the other pump next time. The operator also has the ability to toggle the pump selected for the next start.

When pump operation is stopped the pump discharge valve is closed and the pipeline is left filled.

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2300.601.2.3 Summarized Controls Description

FGD Area Sump The FGD Area Sump consists of a sump mixer, two sump pumps with associated discharge control valves and two level transmitters.


A minimum level of 5.2’ is required to automatically start the sump mixer. One of the two sump pumps can be placed in lead and that sump pump will run whenever the sump level is >10’.

Each FGD Area Sump Pump is equipped with an automatic pump back flush valve. If FGD Area Sump Level is above 10 feet, or neither FGD Area Sump Pump A or B is running for >60 seconds, an OPEN command will be issued to open the Back Flush Valve. If FGD Area Sump Level is < 10 feet for >60 seconds, or either FGD Area Sump Pump A or B is running for >60 seconds, the OPEN command will be reset closing the Back Flush Valve.


The FGD area sumps are controlled based on the respective sump’s liquid level. Each sump is equipped with a continuous level measuring instrument providing local and remote indication. Two sump pumps are provided for each sump. One is operating and one is stand-by. The selected sump pump starts upon a sump high level (10’) and stops upon a sump level (1.5’). The stand-by pump starts automatically on the trip of the primary pump. The operator is given a high-high level alarm. The sump pump discharge destination is determined by manual valves installed in the pipeline.

When in auto mode the DCS stops and starts sump pumps automatically without operator initiation Starts are alternated between the two pumps in order to equalize run time. When one pump stops, a toggle switches to start the other pump next time. The operator also has the ability to toggle the pump selected for the next start.



BWN-3/4-02300.601 Rev 0



Dewatering Area Sump The dewatering Sump consists of a sump mixer, two sump pumps with associated discharge control valves and two level transmitters.



Each Dewatering Area Sump Pump is equipped with an automatic pump back flush valve. If Dewatering Area Sump Level is above 10 feet, or neither Dewatering Area Sump Pump A or B is running for >60 seconds, an OPEN command will be issued to open the Back Flush Valve. If Dewatering Area Sump Level is < 10 feet for >60 seconds, or either Dewatering Area Sump Pump A or B is running for >60 seconds, the OPEN command will be reset closing the Back Flush Valve.


The dewatering area sump is controlled based on the sump’s liquid level. The sump is equipped with a continuous level measuring instrument providing local and remote indication. Two sump pumps are provided for each sump - one is operating and one is stand-by. The selected sump pump starts upon a sump high level and stops upon a sump level of 1.5’. The stand-by pump starts automatically on the trip of the primary pump. The operator is given a high-high level alarm. The sump pump discharge destination is determined by manual valves installed in the pipeline.




BWN-3/4-02300.601 Rev 0



Ash Pond Transfer Sump The Ash Pond Transfer Sump consists of a sump mixer, two sump pumps with associated discharge control valves and two level transmitters.



Each Ash Pond Transfer Sump Pump is equipped with an automatic pump back flush valve. If Ash Pond Transfer Sump Level is above 10 feet, or neither Ash Pond Transfer Sump Pump A or B is running for >60 seconds, an OPEN command will be issued to open the Back Flush Valve. If Ash Pond Transfer Sump Level is < 10 feet for >60 seconds, or either Ash Pond Transfer Sump Pump A or B is running for >60 seconds, the OPEN command will be reset closing the Back Flush Valve.


The ash pond transfer (APT) sumps are controlled based on the respective sump’s liquid level. Each sump is equipped with a continuous level measuring instrument providing local and remote indication. Two sump pumps are provided for each sump. One is operating and one is stand-by. The selected sump pump starts upon a sump high level and stops upon a sump level of 1.5’. The stand-by pump starts automatically on the trip of the primary pump. The operator is given a high-high level alarm.




The APT Sump can also be used to re-seed the JBR with Gypsum when necessary.

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2300.601.2.4 Detailed Controls Description

Limestone Area Sump

The Limestone Area Sump consists of a sump mixer, two sump pumps with associated discharge control valves, and two level transmitters. The level transmitters are used to generate an average sump level which is used for controlling mixer and pump operation as well as to generate a sump level high alarm. The minimum sump level required to operate the mixer in automatic mode is > 5.2’ and a pump will start at a level of 10’. The high level alarm is generated at >11’. Each level transmitter is ranged from 0’ to 12’. Should one of the transmitters indicate bad quality (bad signal), that transmitter is not used to calculate sump level and the remaining transmitter will be the only source for sump level. Additionally, the operator can select a transmitter to bypass if necessary. The operator has the ability to START, STOP, and LOCKOUT the mixer from the DCS. When placed in LOCKOUT, the mixer will not operate. When the operator places the mixer in STOP, a momentary signal of two seconds is generated from within the logic that takes the mixer out of operation and resets the automatic mode. When the operator selects START from the DCS, a command is generated to energize the motor contactor for the mixer motor and the mixer will operate regardless of level. If sump level is >5.2’ and the mixer is not in TAGOUT, LOCKOUT, and the operator has not selected START, the mixer will be in an automatic mode of operation and will run continuously. Alarms will be generated by the DCS for the mixer motor when the current is abnormal when running, if the mixer is commanded to run by the operator, or automatically and the mixer motor contactor has not closed within 2 seconds or if the sump level is >5.2’ and the mixer motor contactor has not closed within 5 seconds. Additionally, indications are provided for “NORMAL AFTER START”, “MIXER AUTOMATIC”, and “MIXER LOCKOUT”. The logic for each sump pump is identical and therefore only one pump will be discussed. The operator has the ability to START, STOP, and LOCKOUT each pump from the DCS. Additionally, the operator has the option of placing one of the sump pumps in LEAD operation. When a pump is placed in the LEAD mode of operation, that pump will be commanded to automatically start when sump level is >10’ for >5 seconds. When the automatic pump run command is generated, the pump will start provided that the pump is not in LOCKOUT, not in TAGOUT, and the operator has not already manually started the pump. When placed in LOCKOUT, the pump will not operate. When the operator places the pump in STOP, a momentary signal of two seconds is generated from within the logic that takes the pump out of operation and resets the automatic mode. When the operator selects START from the DCS, a command is generated to energize the motor contractor for the pump motor and the pump will operate. An alarm will be generated by the DCS if the pump motor contactor is open for two seconds while the pump is commanded to run either manually or automatically.

BWN-3/4-02300.601 Rev 0



Additionally, indications are provided for “NORMAL AFTER START”, “PUMP AUTOMATIC”, and “PUMP LOCKOUT”. A back flush control valve is provided for each sump pump. The logic for each control valve is identical and therefore only one valve will be discussed. The operator has the ability to OPEN, CLOSE, and place the valve in AUTO. When the valve is in the automatic mode of operation, the DCS will issue an OPEN command whenever Sump Level is above 10 feet, or neither Sump Pump A or B is running for >60 seconds. The OPEN command will energize the valve’s positioner to open the valve.

If Sump Level is < 11 feet for >60 seconds, or either Sump Pump A or B is running for >60 seconds, the OPEN command will be reset de-energizing the valves positioner to close the valve.

When the operator selects OPEN and the valve is not in TAGOUT, the DCS will issue an OPEN command regardless of pump status. Whenever the operator selects CLOSE and the valve is not in TAGOUT, the DCS will reset the OPEN command, de-energizing the valves positioner to close the valve. Whenever the DCS generates an OPEN or CLOSE command either automatically or manually, a “FAILED” alarm will be generated if the valve does not indicate in the commanded position within 30 seconds. Indications provided for the valve by the DCS are “OPENED LIMIT”, CLOSED LIMIT”, “AUTO”, “OPEN”, and “CLOSED”.

A discharge control valve is provided for each sump pump. The logic for each control valve is identical and therefore only one valve will be discussed. The operator has the ability to OPEN, CLOSE, STOP and place the valve in AUTO. When the valve is in the automatic mode of operation, the DCS will latch an OPEN command whenever the valve’s associated pump is running provided the valve is not in TAGOUT. The OPEN command will energize the valve’s positioner to open the valve and will reset the CLOSE command latch for the valve. Whenever the valve’s associated pump is not running and the valve is in automatic, the DCS will latch a CLOSE command and will energize the valve’s positioner to close the valve and the OPEN command latch will be reset. When the operator selects OPEN and the valve is not in TAGOUT, the DCS will latch an OPEN command regardless of pump status, will reset the CLOSE command latch and will remove the valve from the automatic mode of operation. Whenever the operator selects CLOSE and the valve is not in TAGOUT, the DCS will latch a CLOSE command, reset the OPEN command latch and will remove the valve from the automatic mode of operation provided the pump is not running. Whenever the DCS generates an OPEN or CLOSE command either automatically or manually, a “FAIL TO OPN” or “FAIL TO CLS” alarm will be generated if the valve does not indicate in the commanded position within 20 seconds. If the valve’s associated pump is running and the valve does not indicate open within 20 seconds or if the valve’s associated pump is not running and the valve does not indicate closed within 20 seconds, a “WRONG POSN” alarm will be generated.

BWN-3/4-02300.601 Rev 0



When the operator selects STOP, either the OPEN command latch or the CLOSE command latch is reset depending on which latch is active and the valve is removed from the automatic mode of operation. If the valve is actively moving from one position to the other, this command will stop the valve at an intermediate position. Indications provided for the valve by the DCS are “AUTO”, “OPEN”, and “CLOSED”.

BWN-3/4-02300.601 Rev 0



FGD Area Sump

The FGD Area Sump consists of a sump mixer, two sump pumps with associated discharge control valves, and two level transmitters. The level transmitters are used to generate an average sump level which is used for controlling mixer and pump operation as well as to generate a sump level high alarm. The minimum sump level required to operate the mixer in automatic mode is > 5.2’ and a pump will energize to drain the sump contents at a level of 10’. The high level alarm is generated at >10’. Each level transmitter ranged from 0’ to 12’. Should one of the transmitters indicate bad quality (bad signal), that transmitter is not used to calculate sump level and the remaining transmitter will be the only source for sump level. Additionally, the operator can select a transmitter to bypass if necessary. The operator has the ability to START, STOP, and LOCKOUT the mixer from the DCS. When placed in LOCKOUT, the mixer will not operate. When the operator places the mixer in STOP, a momentary signal of two seconds is generated from within the logic that takes the mixer out of operation and resets the automatic mode. When the operator selects START from the DCS, a command is generated to energize the motor contactor for the mixer motor and the mixer will operate regardless of level. If sump level is >5.2’ and the mixer is not in TAGOUT, LOCKOUT, and the operator has not selected START, the mixer will be in an automatic mode of operation and will run continuously. Alarms will be generated by the DCS for the mixer motor when the current is abnormal when running, if the mixer is commanded to run by the operator, or automatically and the mixer motor contactor has not closed within 2 seconds or if the sump level is >5.2’ and the mixer motor contactor has not closed within 5 seconds. Additionally, indications are provided for “NORMAL AFTER START”, “MIXER AUTOMATIC”, and “MIXER LOCKOUT”. The logic for each sump pump is identical and therefore only one pump will be discussed. The operator has the ability to START, STOP, and LOCKOUT each pump from the DCS. Additionally, the operator has the option of placing one of the sump pumps in LEAD operation. When a pump is placed in the LEAD mode of operation, that pump will be commanded to automatically start when sump level is >10’ for >5 seconds. When the automatic pump run command is generated, the pump will start provided that the pump is not in LOCKOUT, not in TAGOUT, and the operator has not already manually started the pump. When placed in LOCKOUT, the pump will not operate. When the operator places the pump in STOP, a momentary signal of two seconds is generated from within the logic that takes the pump out of operation and resets the automatic mode. When the operator selects START from the DCS, a command is generated to energize the motor contractor for the pump motor and the pump will operate. An alarm will be generated by the DCS if the pump motor contactor is open for two seconds while the pump is commanded to run either manually or automatically.

BWN-3/4-02300.601 Rev 0




If Sump Level is < 11 feet for >60 seconds, or either Sump Pump A or B is running for >60 seconds, the OPEN command will be reset de-energizing the valve positioner to close the valve.



BWN-3/4-02300.601 Rev 0




BWN-3/4-02300.601 Rev 0



Dewatering Area Sump The Dewatering Area Sump consists of a sump mixer, two sump pumps with associated discharge control valves, and two level transmitters. The level transmitters are used to generate an average sump level which is used for controlling mixer and pump operation as well as to generate a sump level high alarm. The minimum sump level required to operate the mixer in automatic mode is > 5.2’ and a pump will energize to drain the sump contents at a level of 10’. The high level alarm is generated at >11’. Each level transmitter is ranged from 0’ to 12’. Should one of the transmitters indicate bad quality (bad signal), that transmitter is not used to calculate sump level and the remaining transmitter will be the only source for sump level. Additionally, the operator can select a transmitter to bypass if necessary. The operator has the ability to START, STOP, and LOCKOUT the mixer from the DCS. When placed in LOCKOUT, the mixer will not operate. When the operator places the mixer in STOP, a momentary signal of two seconds is generated from within the logic that takes the mixer out of operation and resets the automatic mode. When the operator selects START from the DCS, a command is generated to energize the motor contactor for the mixer motor and the mixer will operate regardless of level. If sump level is >5.2’ and the mixer is not in TAGOUT, LOCKOUT, and the operator has not selected START, the mixer will be in an automatic mode of operation and will run continuously. Alarms will be generated by the DCS for the mixer motor when the current is abnormal when running, if the mixer is commanded to run by the operator, or automatically and the mixer motor contactor has not closed within 2 seconds or if the sump level is >5.2’ and the mixer motor contactor has not closed within 5 seconds. Additionally, indications are provided for “NORMAL AFTER START”, “MIXER AUTOMATIC”, and “MIXER LOCKOUT”. The logic for each sump pump is identical and therefore only one pump will be discussed. The operator has the ability to START, STOP, and LOCKOUT each pump from the DCS. Additionally, the operator has the option of placing one of the sump pumps in LEAD operation. When a pump is placed in the LEAD mode of operation, that pump will be commanded to automatically start when sump level is >10’ for >5 seconds. When the automatic pump run command is generated, the pump will start provided that the pump is not in LOCKOUT, not in TAGOUT, and the operator has not already manually started the pump. When placed in LOCKOUT, the pump will not operate. When the operator places the pump in STOP, a momentary signal of two seconds is generated from within the logic that takes the pump out of operation and resets the automatic mode. When the operator selects START from the DCS, a command is generated to energize the motor contractor for the pump motor and the pump will operate. An alarm will be generated by the DCS if the pump motor contactor is open for two seconds while the pump is commanded to run either manually or automatically.

BWN-3/4-02300.601 Rev 0




If Sump Level is < 10 feet for >60 seconds, or either Sump Pump A or B is running for >60 seconds, the OPEN command will be reset de-energizing the valves positioner to close the valve.



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Ash Pond Transfer Sump The Ash Pond Transfer Sump consists of a sump mixer, two sump pumps with associated discharge control valves, and two level transmitters. The level transmitters are used to generate an average sump level which is used for controlling mixer and pump operation as well as to generate a sump level high alarm. The minimum sump level required to operate the mixer in automatic mode is > 5.2’ and a pump will start to drain the sump contents at a level of 10’. The high level alarm is generated at >11’. Each level transmitter is ranged from 0’ to 12’. Should one of the transmitters indicate bad quality (bad signal), that transmitter is not used to calculate sump level and the remaining transmitter will be the only source for sump level. Additionally, the operator can select a transmitter to bypass if necessary. The operator has the ability to START, STOP and LOCKOUT the mixer from the DCS. When placed in LOCKOUT, the mixer will not operate. When the operator places the mixer in STOP, a momentary signal of two seconds is generated from within the logic that takes the mixer out of operation and resets the automatic mode. When the operator selects START from the DCS, a command is generated to energize the motor contactor for the mixer motor and the mixer will operate regardless of level. If sump level is >5.2’ and the mixer is not in TAGOUT, LOCKOUT, and the operator has not selected START, the mixer will be in an automatic mode of operation and will run continuously. Alarms will be generated by the DCS for the mixer motor when the current is abnormal when running, if the mixer is commanded to run by the operator, or automatically and the mixer motor contactor has not closed within 2 seconds or if the sump level is >5.2’ and the mixer motor contactor has not closed within 5 seconds. Additionally, indications are provided for “NORMAL AFTER START”, “MIXER AUTOMATIC”, and “MIXER LOCKOUT”. The logic for each sump pump is identical and therefore only one pump will be discussed. The operator has the ability to START, STOP and LOCKOUT each pump from the DCS. Additionally, the operator has the option of placing one of the sump pumps in LEAD operation. When a pump is placed in the LEAD mode of operation, that pump will be commanded to automatically start when sump level is >10’ for >5 seconds. When the automatic pump run command is generated, the pump will start provided that the pump is not in LOCKOUT, not in TAGOUT, the operator has not already manually started the pump, and the pump start and auto permits are met. The pump start and auto permits consist of the pump not failed, the associated pump’s MCC not in alarm, the associated pump’s MCC not in maintenance and the associated pump’s MCC Schweitzer relay not tripped. When placed in LOCKOUT, the pump will not operate. When the operator places the pump in STOP, a momentary signal of two seconds is generated from within the logic that takes the pump out of operation and resets the automatic mode. When the operator selects START from the DCS, a command is generated to energize the motor contractor for the pump motor and the pump will operate provided that the pump start and auto permits are met.

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An alarm will be generated by the DCS if the pump motor contactor is open for two seconds while the pump is commanded to run either manually or automatically. Additionally, indications are provided by the DCS for “NORMAL AFTER START”, “AUTOMATIC”, “AUTOSTART” and “LOCKOUT”. Other indications associated with the Ash Pond Transfer Pumps are phase amperage for all three phases, parasitic power and time to reset. A back flush control valve is provided for each sump pump. The logic for each control valve is identical and therefore only one valve will be discussed. The operator has the ability to OPEN, CLOSE, and place the valve in AUTO. When the valve is in the automatic mode of operation, the DCS will issue an OPEN command whenever Sump Level is above 10 feet, or neither Sump Pump A or B is running for >60 seconds. The OPEN command will energize the valve’s positioner to open the valve.

If Sump Level is >11 feet for >60 seconds, or either Sump Pump A or B is running for >60 seconds, the OPEN command will be reset de-energizing the valves positioner to close the valve.


A discharge control valve is provided for each sump pump. The logic for each control valve is identical and therefore only one valve will be discussed. The operator has the ability to OPEN, CLOSE, STOP and place the valve in AUTO. When the valve is in the automatic mode of operation, the DCS will latch an OPEN command whenever the valve’s associated pump is running provided the valve is not in TAGOUT. The OPEN command will energize the valve’s positioner to open the valve and will reset the CLOSE command latch for the valve. Whenever the valve’s associated pump is not running and the valve is in automatic, the DCS will latch a CLOSE command and will energize the valve’s positioner to close the valve and the OPEN command latch will be reset. When the operator selects OPEN and the valve is not in TAGOUT, the DCS will latch an OPEN command regardless of pump status, will reset the CLOSE command latch and will remove the valve from the automatic mode of operation. Whenever the operator selects CLOSE and the valve is not in TAGOUT, the DCS will latch a CLOSE command, reset the OPEN command latch and will remove the valve from the automatic mode of operation provided the pump is not running. Whenever the DCS generates an OPEN or CLOSE command either automatically or manually, a “FAIL TO OPN” or “FAIL TO CLS” alarm will

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be generated if the valve does not indicate in the commanded position within 20 seconds. If the valve’s associated pump is running and the valve does not indicate open within 20 seconds or if the valve’s associated pump is not running and the valve does not indicate closed within 20 seconds, a “WRONG POSN” alarm will be generated. When the operator selects STOP, either the OPEN command latch or the CLOSE command latch is reset depending on which latch is active and the valve is removed from the automatic mode of operation. If the valve is actively moving from one position to the other, this command will stop the valve at an intermediate position. Indications provided for the valve by the DCS are “AUTO”, “OPEN”, and “CLOSED”.

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2300.601.3 Process Flow Description

Process Flow

S tep 1.

The Limestone Area Sump Mixer (WW-MX-5380) is started once sump level is >5.2’. Reference Drawing No. D1M20045, Sheet 1, Rev. 3, FGD Project P&ID – Limestone Area and Dewatering Area Sumps.

S tep 2.

The waste water volume is suctioned through Limestone Area Sump Pump A/B (WW-PU-5380A & B) and discharged through the Limestone Area Sump Pump Discharge Control Valve A/B (WW-XV-5381A & B) into the Limestone Area Sump Common Discharge Header. Reference Drawing No. D1M20045, Sheet 1, Rev. 3, FGD Project P&ID – Limestone Area and Dewatering Area Sumps.

Step 3. Depending on system alignment, the waste water flows through manual isolation valve (WW003) to the Ash Pond Transfer Sump or flows through manual isolation valve (WW004) to be reclaimed back into the Limestone Slurry Transfer Tank A. Reference Drawing No. D1M20045, Sheet 1, Rev. 3, FGD Project P&ID – Limestone Area and Dewatering Area Sumps.

Step 4. Make-Up Water for filling is added to the sump through a 3” line and manual isolation valve MU-059. Make-Up Water for flushing of the sump and sump discharge lines is added to the sump through a 3” line. The Make-Up Water flows through manual isolation valve (MU-272), automatic valve (WW-XV-5382A/B) and manual valves (WW-030/032) to the sump discharge line and sump pumps for flushing. Reference Drawing No. D1M20045, Sheet 1, Rev. 3, FGD Project P&ID – Limestone Area and Dewatering Area Sumps. S tep 5.

The FGD Area Sump Mixer (WW-MX-5495) is started once sump level is >5.2’. Reference Drawing No. D3M20046, Sheet 1, Rev. 3, FGD Project P&ID – FGD Area and Ash Pond Transfer Sumps.

S tep 6.

The waste water volume is suctioned through FGD Area Sump Pump A/B (WW-PU-5495A & B) and discharged through the FGD Area Sump Pump Discharge Control Valve A/B (WW-XV-5496A & B) into the FGD Area Sump Common Discharge Header. Reference Drawing No. D3M20046, Sheet 1, Rev. 3, FGD Project P&ID – FGD Area and Ash Pond Transfer Sumps.

Step 7. Depending on system alignment, the waste water flows through manual isolation valve WW009 to the Ash Pond Transfer Sump or flows through manual isolation valve (WW007) for gypsum reseeding of the JBR. Reference Drawing No. D3M20046, Sheet 1, Rev. 3, FGD Project P&ID – FGD Area and Ash Pond Transfer Sumps.

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Step 8. Gypsum reseeding water for the JBR flows through manual isolation valve (SK115) and into the vessel. Reference Drawing No. D1M20009, Sheet 1, Rev. 3, FGD Project P&ID – FGD Area and Ash Pond Transfer Sumps. Step 9. Make-Up Water for filling is added to the sump through a 4” line and manual isolation valve MU-273. Make-Up Water for flushing of the sump and sump discharge lines is added to the sump through a 4” line. The Make-Up Water flows through manual isolation valve (MU-274), automatic valve (WW-XV-5497A/B) and manual valves (WW-036/037) to the sump discharge line and sump pumps for flushing. Reference Drawing No. D3M20046, Sheet 1, Rev. 3, FGD Project P&ID – FGD Area and Ash Pond Transfer Sumps.

S tep 10.

The Dewatering Area Sump Mixer (WW-MX-5390) is started once sump level is >5.2’. Reference Drawing No. D1M20045, Sheet 1, Rev. 3, FGD Project P&ID – Limestone Area and Dewatering Area Sumps.

S tep 11.

The waste water volume is suctioned through Dewatering Area Sump Pump A/B (WW-PU-5390A & B) and discharged through the Dewatering Area Sump Pump Discharge Control Valve A/B (WW-XV-5391A & B) into the Dewatering Area Sump Common Discharge Header. Reference Drawing No. D1M20045, Sheet 1, Rev. 3, FGD Project P&ID – Limestone Area and Dewatering Area Sumps.

Step 12. Depending on system alignment, the waste water flows through manual isolation valve (WW001) to the Ash Pond Transfer Sump or flows through manual isolation valve (WW002) to Return Water Tanks (WR-TK-5400A & B). Reference Drawing No. D1M20045, Sheet 1, Rev. 3, FGD Project P&ID – Limestone Area and Dewatering Area Sumps.

Step 13. If the Dewatering Area Sump Common Discharge Header is aligned to (WW002), then the waste water flows through manual isolation valves through (WW027 and WW028) to the Return Water Tanks (WR-TK-5400A & B). Reference Drawing No. D1M20038, Sheet 1, Rev. 6, FGD Project P&ID – U1-U4 Return Water System.

Step 14

Make-Up Water for filling is added to the sump through a 4” line and manual isolation valves (MU-270) and (MU-285). Make-Up Water for flushing of the sump and sump discharge lines is added to the sump through a 4” line and manual isolation valve (MU-270). The Make-Up Water flows through automatic valve (WW-XV-5392A/B) and manual valves (WW-032/033) to the sump discharge line and sump pumps for flushing. Reference Drawing No. D1M20045, Sheet 1, Rev. 3, FGD Project P&ID – Limestone Area and Dewatering Area Sumps.

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S tep 15.

The Ash Pond Transfer Sump Mixer (WW-MX-5480) is started once sump level is >5.2’. Reference Drawing No. D3M20046, Sheet 1, Rev. 3, FGD Project P&ID – FGD Area and Ash Pond Transfer Sumps.

S tep 16.

The waste water volume is suctioned through Ash Pond Transfer Sump Pump A/B (WW-PU-5480A & B) and discharged through the Ash Pond Transfer Sump Pump Discharge Control Valve A/B (WW-XV-5481A & B) into the Ash Pond Transfer Sump Common Discharge Header and to the Ash Pond. Reference Drawing No. D3M20046, Sheet 1, Rev. 3, FGD Project P&ID – FGD Area and Ash Pond Transfer Sumps.

S tep 17.

Make-Up Water for filling is added to the sump through a 4” line and manual isolation valve MU-057. Make-Up Water for flushing of the sump and sump discharge lines is added to the sump through a 4” line and manual isolation valve (MU-271). The Make-Up Water flows through automatic valve (WW-XV-5482A/B) and manual valves (WW-034/035) to the sump discharge line and sump pumps for flushing. Reference Drawing No. D3M20046, Sheet 1, Rev. 3, FGD Project P&ID – FGD Area and Ash Pond Transfer Sumps.

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2300.601.4 Drawing References

The Scrubber Sump System is illustrated on the following drawings:


• D1M20027 1 3 FGD Project – P&ID – Limestone Slurry Transfer System

• D1M20038 1 6 FGD Project – P&ID – Return Water System


• D1M20053 1 2 FGD Project P&ID Limestone Area Instrument Air

• D1M20054 1 1 FGD Project P&ID Gypsum Dewatering Area Instrument Air

• D3M20009 1 2 FGD Project – P&ID – Jet Bubbling Reactor JBR Piping


• D3M20051 1 2 FGD Project P&ID Tank Farm Area Instrument Air

• D3M20052 1 2 FGD Project P&ID Mist Eliminator Area Instrument Air

• D4M20009 1 2 FGD Project – P&ID – Jet Bubbling Reactor JBR Piping

Single Line

• S94001 1 A FGD - Scrubber -Plumbing -Dewatering Building -Electrical DG-MCMAA-5000 AND DG-MCMAB-5000 480V MCC Single Line Diagram

• S94965 1 B FGD - Scrubber -Plumbing -Dewatering Building -Electrical 480V Distribution Single Line Diagram

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Number Sheet Rev Title Distribution Panels

• E-153951-00-E-0350 1 A Electrical Panelboard Schedules

• S94948 1 C FGD - Scrubber - Gypsum Dewatering Project - Electrical Panelboard Schedules

• E3E30128 1 5 FGD Project Distribution Panel JBR 3/4 Electrical Bldg 120/208V AC Panel A

• E3E30129 1 3 FGD Project Distribution Panel JBR 3/4 Electrical Bldg 120/208V AC Panel B

• E3E30134 1 4 FGD Project Distribution Panel Limestone Electrical Bldg 120/208V AC Panel C

• E3E30135 1 3 FGD Project Distribution Panel Limestone Electrical Bldg 120/208V AC Panel D

• E3E30140 1 7 FGD Project Distribution Panel JBR 3/4 Electrical Bldg 120V Critical AC Panel A and Inverter

• E3E30142 1 3 FGD Project Distribution Panel Limestone Electrical Bldg 120V Critical AC Panel A and Inverter

• E3E30144 1 3 FGD Project Distribution Panel JBR 3/4 Electrical Bldg 125V DC Panel A & Battery Chargers

• E3E30145 1 0 FGD Project Distribution Panel JBR 3/4 Electrical Bldg 125V DC Panel B

Elementary Diagrams

• E3E30210 1 1 FGD Project Elementary Diagram JBR 3/4 480V SWGR Bus A FDR to 3/4 Ash Pond Transfer Sump Pump A

• E3E30217 1 1 FGD Project Elementary Diagram JBR 3/4 480V SWGR Bus B FDR to 3/4 Ash Pond Transfer Sump Pump B

• E3E30222 1 2 Elementary Diagram – 3/4 FGD Area Sump Pump A, B and Mixer

• E3E30222 2 1 Elementary Diagram – 3/4 FGD Area Sump Pump A, B and Mixer

• E3E30223 1 0 FGD Project Elementary Diagram – 3/4 Ash Pond Transfer Sump Mixer

• E3E30543 1 2 Elementary Diagram – Limestone Mill Area Sump Pumps A & B & Sump Mixer

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Number Sheet Rev Title Elementary Diagrams

• E3E30543 2 1 Elementary Diagram – Limestone Mill Area Sump Pumps A & B & Sump Mixer

• S95185 1 A FGD - Scrubber - Gypsum Dewatering Project -Electrical Elementary Diagram Sump Pump B WW-MO-5390B

• S95186 1 A FGD - Scrubber - Gypsum Dewatering Project -Electrical Elementary Diagram Sump Pump A WW-MO-5390A

• S95187 1 A FGD - Scrubber - Gypsum Dewatering Project -Electrical Elementary Diagram Dewatering Area Sump Mixer WW-MO-5390

• S95506 1 A FGD - Scrubber - Gypsum Dewatering Project - Electrical Elem. Diagram 480V Feeder Breaker To 480V Sump Pump A Starter

• S95511 1 A FGD - Scrubber - Gypsum Dewatering Project - Electrical Elem. Diagram 480V Feeder Breaker To 480V Sump Pump B Starter

• S94143 1 B FGD - Scrubber - Gypsum Dewatering Project - GE Switchgear – 480V - Sump Pump - B BRK Control CKT

• S94167 1 B FGD - Scrubber - Gypsum Dewatering Project - GE Switchgear – 480V- Sump Pump - A BKR Control CKT

Functional Control Diagrams

• D5F00651 1 0 Scrubber – 3/4 Ash Pond Xfer Sump Level Functional Control Diagram

• D5D00652 1 0 Scrubber – 3/4 Ash Pond Xfer Sump Mixer Functional Control Diagram

• D5F00653 1 0 Scrubber – 3/4 Ash Pond Xfer Sump Pump A Functional Control Diagram



• D5F00655 1 0 Scrubber – 3/4 Ash Pond Xfer Sump Pump B Functional Control Diagram

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Number Sheet Rev Title Functional Control Diagrams



• D5D00657 1 0 Scrubber – 3/4 Ash Pond Xfer Sump Pumps Functional Control Diagram

• D5F00641 1 0 Scrubber – 3/4 FGD Area Sump Level Functional Control Diagram

• D5D00642 1 0 Scrubber – 3/4 FGD Area Sump Mixer Functional Control Diagram

• D5D00643 1 0 Scrubber – 3/4 FGD Area Sump Pump A Functional Control Diagram

• D5D00644 1 0 Scrubber – 3/4 FGD Area Sump Pump B Functional Control Diagram

• D5D00645 1 0 Scrubber – 3/4 FGD Area Sump Pumps Functional Control Diagram

• D5D00646 1 0 Scrubber – 3/4 FGD Area Sump Pump A Discharge Valve Functional Control Diagram

• D5D00647 1 0 Scrubber – 3/4 FGD Area Sump Pump B Discharge Valve Functional Control Diagram

Loop Sheets

• B3IWWX5381 1 0 Loop Sheet – Limestone Mill Area Pump A Discharge Valve WW-XV-5381A

• B3IWWX5381 2 0 Loop Sheet – Limestone Mill Area Pump B Discharge Valve WW-XV-5381B

• B3IWWX5481 1 0 Loop Sheet – Ash Pond Xfer Sump Pump A Disch Valve WW-XV-5481A

• B3IWWX5481 2 0 Loop Sheet – Ash Pond Xfer Sump Pump B Disch Valve WW-XV-5481B

• B3IWWX5496 1 0 Loop Sheet – FGD Area Sump Pump A Discharge Valve WW-XV-5496A

• B3IWWX5496 2 0 Loop Sheet – FGD Area Sump Pump B Discharge Valve WW-XV-5496B

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Number Sheet Rev Title Vendor O&M Manuals

• S80547 1 0 Scrubber - FGD - Agitator - Assembly Drawing - Axial Flow Impeller

• S80629 1 D Scrubber – Ball Mill / JBR Sump Agitator – General Arrangement

• S80693 1 A Scrubber - Flue Gas Desulfurization - Arrangement Drawing - Foundation Loads - Mill Area Sump Pumps

• S80694 1 B Scrubber - Flue Gas Desulfurization - Component Drawing - FGD Area Sump Pump

• S80756 1 0 Scrubber - FGD - Mixer Installation & Storage Instruction Manual

• S80786 1 A Scrubber - Flue Gas Desulfurization - Curve - Mill Area Sump Pump

• S82436 1 A Scrubber - FGD - Agitator - 10' X 10 Sumps Ball Mill/JBR - Mixer Installation Operation & Maintenance Manual

• S82437 1 A Scrubber - FGD - Agitator - 16' X 16' Sumps Dewater/Ashpond - Mixer Installation, Operation & Maintenance Manual

• S82438 1 A Scrubber - FGD - Agitator - JBR Absorber Agitators - Mixer Installation, Operation & Maintenance Manual

• S82482 1 0 Scrubber - Flue Gas Desulfurization - Curves - Nameplate - Dewatering Area Sump Pumps

• S82491 1 A Scrubber - Flue Gas Desulfurization - Nameplate - Ash Pond Transfer Sump Pumps

• S82495 1 A Scrubber - Flue Gas Desulfurization - Connection Diagram - Ash Pond Transfer Sump Pumps

• S82519 1 0 Scrubber - Flue Gas Desulfurization - Dewatering Area Sump Pump Acid Proof Components Drawing

• S82779 1 A Scrubber - Flue Gas Desulfurization - Motor Outline - FGD Area Sump Pump

• S82780 1 0 Scrubber - Flue Gas Desulfurization - Performance Data - FGD Area Sump Pump

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Number Sheet Rev Title Vendor O&M Manuals

• S82781 1 A Scrubber - Flue Gas Desulfurization - Motor Outline - Mill Area Sump Pump Motor

• S82782 1 0 Scrubber - Flue Gas Desulfurization - Performance Data - FGD Area Sump Pump Motor


• S84391 1 0 Scrubber - FGD - Ash Pond Transfer Sump Pump & Dewatering Area Sump Pump - Acid Proof Components Drawing

• S92425 1 0 Scrubber - Flue Gas Desulfurization - Installation, Operation & Maintenance Manual - Mill Area Pumps

• S93766 1 0 Scrubber - Flue Gas Desulfurization - Dewatering Area Sump Pump - Installation, Operation & Maintenance Manual

• S93767 1 0 Scrubber - Flue Gas Desulfurization - Ash Pond Transfer Sump Pump - Installation, Operation & Maintenance Manual


Procedure Revision Summary

Revision Document Change:

0

Initial issue of document.

1

2

NOTE: See Revision Bars for specific changes within document.

Documents

FGD Sump System - Southern Company Plant Animations · PDF file2300.601.1 Safety Considerations 1. All Operating Companies Safety and Health Manuals shall be followed at all times