CEJW

Revised

NOVEMBER 2018

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CEJW IMMERSED ELECTRODE

BOILERS LOOP FOR EVERY

APPLICATION

These Electrode Boilers have unlimited

application possibilities wherever a need

for process or space heating exists.

A partial list of possible uses includes:

• Office and apartment building • Hospitals, schools, hotels • Food processing • Clothing and textiles plants • Industrial plants • Mining operations

ADVANTAGES

• For direct network connection at up to 20 KV

• Economical even for capacities between 2 & 22 MW

• Simple controls • Can be added to existing system and

suitable for optional water storage facilities

• Taking advantage of low off – peak electricity rates and demand charges

BOILER

ACME ENGINEERING PRODUCTS offers hot water boilers

based on proven design for building complexes,

commercial structures and light industry. This boiler can

be connected directly on the high voltage power

distribution network.

Any voltage up to 20 KV, 3 phases, 3 wires and centerline

grounded line.

• Capacities from 3000 to 34,000 KW

• Operating pressure to suit

• Voltages up to 20 KV, direct on line as above

• Economical electrical installation directly at high volt-

age, pre-wired for installation close to existing buildings.

• Can be supplied in packaged boiler room system

Completely independent pre-pipped and pre-wired

For installation close to existing buildings. Only heat

exchanger output connections to existing systems are

required.

• Prompt assistance to designers, installers and users.

DESCRIPTION OF OPERATION

The ACME Electrode Model CEJW High Voltage Hot Water

is of the immersed electrode design. The CEJW operates

flooded with water at selected conductivity.

An electronic driving system is used to interpose a con-

centric insulating shield between the electrode and the

neutral counter electrode. The more direct the exposure

between neutral shield and the electrode, the greater the

current draw (amperage) and more hot water is pro-

duced. As the insulating shield is moved between the

electrode and neutral, the current path length and output

is reduced. Hot water is generated in the space between

the electrodes and neutral and escapes into the vessel.

The insulating shields can be used to turn the boiler out-

put down to about 10% or a 10: 1 turn down ratio. To turn

the boiler down below 10%, the supply power must be

interrupted.

The closed loop of the hot water boiler is filled with water

at selected conductivity and periodically surveyed for con-

ductivity. The capacity of the boiler can be adjusted by

varying the conductivity.

The concept of the CEJW is not new. It has been used in

Europe for many years. It is a proven concept with proven

components. As the market for high voltage electrode boil-

ers has expanded, competitive pressures have created a

need for immersed electrode high voltage hot water boil-

ers. Not only are they better suited to certain applications

(water quality permitting) but also somewhat simpler. The

ACME Electrode Models CEJW will satisfy the needs of this

developing market segment.

PERFORMANCE

High performance CEJW high voltage hot water boilers

convert virtually 100% of the electrical energy into heat.

Rapid response achieves full load within 30-40 minutes

from cold start or within one minute from hot start. Au-

tomatic load and temperature control provide step less

control over an output range from 10 to 100%.

Economical Installation Operating at distribution voltag-

es, CEJW boilers eliminate the need for fuel lines, storage

and handling equipment, economizers and emission con-

trol equipment, saving on capital expenditures.

Lower operating costs Electrode boilers are easy to op-

erate. Automatic controls reduce the operating person-

nel requirements. Cost of water treatment is practically

eliminated as the system is isolated. Water loop is origi-

nally filled with water at selected conductivity and quali-

ty. Automatic venting ensures full water filling of vessel.

Solves energy problems For areas affected by allocations

or interruption of natural gas and costly oil, supply elec-

trode boilers provide a dependable source of hot water.

Allows users to take advantages of lower energy rates

during daily or seasonal off peak periods or filling the

demand charge.

Safer operation there are no flames, fumes, fuel lines or

storage tanks. No low water danger since the current

cannot flow without water. And no problem with heat

buildup or electrode burnout even if scaling should oc-

cur. Thermal shock is eliminated. Electrically safe due to

grounded pressure vessel. Safety enclosure around boiler

is not required. Expensive isolating piping connections

are not required

Minimal maintenance Long life electrodes are cooled by

water jets produced by an integrated loop pump. Elec-

trode boilers having a minimum number of components

and electrical controls, provide maximum reliability.

Without fuels, cleaning and maintenance are reduced.

Pollution-free Without combustion, the operation of

CEJW boilers is quiet, clean and emission free. Problems

associated with other energy sources such as noise, fuel

fumes, fly ash, large stacks, do not exist for electrode

boilers.

ACCESSORIES

Pumps

Simplex or duplex pumps circulate water in the loop.

Flow of each pump is determined by the cooling re-

quirements of the electrodes therefore ensuring

their long life and minimizing wear. Air cooled pump

skids include TEFC motors, usually at building voltage

controlled from the System Control Panel. Pressure

loss in the loop determines head of the pump at the

required flow.

Heat Exchanger

Completes heating system loop including boiler and

pump. Plate type construction with standard steel

plates individually removable on rod. Primary circuit

design method is to pump flow and heat transfer of

boiler heating capacity. Secondary circuit water heats

building, plant or storage facilities transferring

heating boiler capacity.

Minor accessories part of the loop

Expansion tank based on total water content of the

loop and its operating pressure. Chemical feed tank

with mixer and injection pump to produce selected

operating conductivity to the initial fill with deminer-

alized water.

Thermal Storage

Can be incorporated as part of the heating system. It

will store the hot water produced during periods of

low demand and low cost and use it at advantageous

times.

WATER TREATMENT AND

CONDUCTIVITY The simplest way is to fill the isolated loop with de-

mineralized water and add caustic soda solution

(NaOH) or phosphate solution (Na₃PO₄) to achieve

the conductivity requested at the operating

temperature.

The conductivity has to be supervised or a constant

basis in order to maintain or avoid exceeding the MW

capacity.

MAXIMUM POWER (MW) AT SELECTED VOLTAGES (KV)

Beside the standard models, CEJW immersed electrode hot water boilers are available to meet specific

capacity and operating conditions.

STANDARD EQUIPMENT FOR MODEL CEJW HEATING LOOP

MECHANICAL

• Pressure vessel with local code approval

• Large Manhole

• Duplex circulating pumps to suit local requirement

• Jacket and thermal insulation of boiler

• Cage surrounding high voltage connections at upper level

• Heat exchanger

• Expansion Tank

CONTROL

• Free standing control panel NEMA 12 (IP54)

• Pre-programmed PLC processor

• HMI display and system electronic gauges

• Operating capacity control based on temperature and MW demand

• Temperature limits

• Water level protection

• Pumps Control and Flow switch

• Electric shield actuator

• Remote monitoring and reporting

PLUMBING

• Safety valve(s)

• Chemical treatment tank

• Conductivity sampling line

• Boiler blowdown valve and isolating valves

• Boiler automatic vent line

• Temperature and pressure gauges

ELECTRICAL

• Common grounding of panels and vessel

• Terminals in cage enclosure

• Duplex sets circulating pumps motor starters if required

IN THE U.S.A

ACME Engineering Prod. INC.

Trimex Ind. Bldg., PMB #10

2330 State Route 11

Mooers, N.Y. 12958

Tel.: (518) 236-5659

Fax.: (518) 236-6941

IN CANADA

ACME Engineering Prod. LTD.

5706 Royalmount Ave.,

Montreal, Quebec

H4p 1k5

Tel.: (514) 342-5656

Fax.: (514) 342-3131

REPRESENTED BY:

BOILER

MODEL UNIT CEJW-6 CEJW-10 CEJW-15 CEJW-20

VOLTAGE KV 4.16 6.9 10 13.5 4.16 6.9 10 13.5 4.16 6.9 10 13.5 4.16 6.9 10 13.5

POWER CAPACITY MW 2.5 4.2 6 6 4 7 10 11 6.2 10 15 17 8 14 20 22

VESSEL DESIGN PRESSURE bar(Psi) 10 (150)

WORKING PRESSURE bar(Psi) 8 (115)

WORKING TEMPERATURE ºC (ºF) 120 (248)

LOOP PIPE DIAMETER mm (in) 200 (8) 250 (10) 300 (12) 350 (14)

VESSEL DIAMETER mm (in) 1700 (66) 2200 (90) 2200 (90) 3000 (120)

VESSEL HEIGHT mm (in) 2000 (80) 2500 (100) 3000 (120) 2500 (100)

CLEARANCE HEIGHT mm (in) 4100 (165) 5000 (200) 6000 (240) 5000 (200)

PUMP

TYPE IN LINE CENTRIFUAL PUMP

QUANTITY 1 2

FLOW RATE m³/hr

(gpm) 300 (1320) 480 (2110) 760 (3350) 960 (4225)

MOTOR POWER KW (hp) 18.5 ( 25) 30 (40) 45 (60) 60 (80)

PRIMARY

CIRCUIT OF

HEAT EX-

CHANGER

TYPE PLATE

PLATE MATERIAL STAINLESS STEEL

TEMPERATURE INLET ºC (ºF) 120 (248)

WORKING PRESSURE bar(Psi) 8 (115)

TEMPERATURE DROP AT

LOOP FLOW ºC (ºF) 17 (31) 18 (33) 17 (31) 18 (33)