Requirement of compressed air :Requirement of compressed air : Unit ControlUnit Control Cleaning (strainer), Generator Purging, Cleaning (strainer), Generator Purging,

Air Ejector, Oil atomising.Air Ejector, Oil atomising. Dust Elimination system – Cleaning of Dust Elimination system – Cleaning of

filter bagfilter bag Fire fighting system - MulsifyreFire fighting system - Mulsifyre Ash conveying – Fly ashAsh conveying – Fly ash Wagon unloading – BOB RakesWagon unloading – BOB Rakes Circuit Breaker OperationCircuit Breaker Operation

Major types of compressors –Major types of compressors – Reciprocating compressorReciprocating compressor

Instrument Air CompressorInstrument Air Compressor Service / Plant Air CompressorService / Plant Air Compressor Mulsyfire compressorMulsyfire compressor

Centrifugal compressor – For ash Centrifugal compressor – For ash conveying.conveying.

Ejector Compressor – limited use.Ejector Compressor – limited use.

Difference between Fans, Blowers and Difference between Fans, Blowers and Compressors –Compressors –

Specific Ratio – Ratio of discharge Specific Ratio – Ratio of discharge pressure over suction pressure.pressure over suction pressure.

Fans – Specific ratio – up to 1.11Fans – Specific ratio – up to 1.11Pressure rise – 1138 mm of water.Pressure rise – 1138 mm of water.

Blower - Specific ratio – up to 1.11 to 1.20Blower - Specific ratio – up to 1.11 to 1.20Pressure rise – 1136 - 2066 mm of Pressure rise – 1136 - 2066 mm of waterwater

Compressor – Specific ratio – more 1.20Compressor – Specific ratio – more 1.20

Some Definitions - Some Definitions -

FAD - Free air delivery is the actual air FAD - Free air delivery is the actual air produced by the compressor pump at the produced by the compressor pump at the rated pressure. Unit is volume per unit time.rated pressure. Unit is volume per unit time.

FAD = V x (P2 - P1) / (Po x T) FAD = V x (P2 - P1) / (Po x T) Where,Where,

FAD - Free Air Delivery (m3/min)FAD - Free Air Delivery (m3/min) V - Volume of the receiver (m3) + volume V - Volume of the receiver (m3) + volume

of the pipeline connected from compressor of the pipeline connected from compressor to air receiver (m3)to air receiver (m3)

Po - Atmospheric PressurePo - Atmospheric Pressure P1 - Initial Pressure of the receiver P1 - Initial Pressure of the receiver

(Kg/cm2)(Kg/cm2) P2 - Final Pressure of the receiver (Kg/cm2)P2 - Final Pressure of the receiver (Kg/cm2) T - Average Time taken (min)T - Average Time taken (min)

Main Parts of reciprocating Main Parts of reciprocating compressor – Generally opposed compressor – Generally opposed balance type.balance type. FrameFrame Crank shaftCrank shaft Cross headCross head CylinderCylinder PistonPiston Discharge valve assemblyDischarge valve assembly Suction valve assemblySuction valve assembly IntercoolerIntercooler After coolerAfter cooler

Frame – made of high grade CI, Frame – made of high grade CI, bearings are fitted on the drive end bearings are fitted on the drive end and non drive end to support crank and non drive end to support crank shaftshaft

Crank shaft – High grade SG Iron in Crank shaft – High grade SG Iron in one piece and dynamically balanced.one piece and dynamically balanced.

Cross head – For the purpose of Cross head – For the purpose of aligning piston rodaligning piston rod

Cylinders – water jacketed, and to Cylinders – water jacketed, and to accommodate pistonaccommodate piston

Piston – Made of special aluminum alloy.Piston – Made of special aluminum alloy. Discharge and suction valve assembly – Discharge and suction valve assembly –

made of SS plate type valves are used.made of SS plate type valves are used. Intercooler – Horizontal shell and tube Intercooler – Horizontal shell and tube

type. Cools Air received from 1type. Cools Air received from 1stst. Stage . Stage discharges effectively in the 2discharges effectively in the 2ndnd. Stage. Stage

After cooler – Identical with intercooler.After cooler – Identical with intercooler. Receiver – Stores compressed air for Receiver – Stores compressed air for

different usages.different usages.

Air Drying Plant – For providing dry Air Drying Plant – For providing dry air required for different instruments air required for different instruments (unit control) to function smoothly.(unit control) to function smoothly.

Consists of following- Consists of following- Pre cooler Pre cooler Moisture SeparatorMoisture Separator HeaterHeater Adsorbing Tower 2 nos.Adsorbing Tower 2 nos. After coolerAfter cooler After filterAfter filter

DRAWING TITLE

R E F E R A N C E D R A W I N G SDRAWING NO. REV.

NM-61522 / 7287

P & I DIAGRAM FOR ADP(XD - 82)

BUDGE BUDGE GENERATING STATION

UNICON ENTERPRISEKOLKATA, PH.:- 9332005920, 9331212032

LIMITEDCESC

DO NOT SCALE

IF IN DOUBT, PL. ASK.

DO NOT SCALE

IF IN DOUBT, PL. ASK.

BBGS / PLANNING / PID / NM-61522 / 7287

1 OF 1 1P & I DIAGRAM FOR ADP (XD - 82) 1

NOTES :-

1. ALL ADTS ARE SOLENOID OPERATED WITH THE HELP OF TIMERS.2. ALL CONTROL CABLING BETWEEN FIELD INSTRUMENTS AND CONTROL PANEL IS IN VENDERS SCOPE.3. FILTERING MEDIA OF AFTER FILTER IS CERAMIC CANDLE.4. AFTER COOLER (AC-A) MOISTURE SEPERATOR (MS-2A, MS-3A) WITH AUTO DRAIN & INTER CONNECTING PIPE ARE NOT IN DELAIR SCOPE OF SUPPLY. 5. DRG. APPROVED AGAINST BUDGE BUDGE GENERATING STATION CONTACT NO.- 7608/38.

1

PC-A

WATER OUTLET

WATERINLET

WET AIRINLETSIZE-100NBFLANGED

AC-A

ADS-1A ADS-2A

MS-1A

DRY AIROUTLETSIZE-100NBFLANGED

AF-1A AF-2A

TAG. No.S.No. LEGEND DESCRIPTION

SPECIFICATIONS

ALL DIMENTIONS ARE IN mm,

UNLESS OTHERWISE MENTIONED.

DO NOT SCALE

IF IN DOUBT, PL. ASK.