ELECTROSTATIC PRECIPITATORSGROUP 5

UMMUSSOBRINA BINTI SAARI 17DAS14F1027AHMAD ILAH MOHAIMIN BIN HASSAN 17DAS14F1031NUR FARRA HANA BINTI MOHD FARIKH 17DAS14F1035SIVANESWARI A/P M. DEVARAJOO 17DAS14F1081

TUBULAR

Consist of parallel arrangements of tubes with high-voltage electrodes running on their axis.

The tubes may be arranged as a circular, square, or hexagonal honeycomb with gas flowing upwards or downwards.

Designed as one-stage units in which all the gas passes through the tube, eliminating sneakage.

Less common than plate types. Used in applications involving wet or sticky particulate, and are

typically cleaned with water for lower reentrainment losses than typical ESPs.

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Can be tightly sealed to prevent leakage of material, an important consideration for valuable or hazardous substances.

PLATE

Plate ESPs primarily collect dry particles and are used more often than tubular precipitators.

Plate-Wire Precipitators In a plate-wire ESP, gas flows between parallel plates of sheet metal

and high-voltage long metal wires. It allows many flow lanes to operate in parallel, making it suitable for handling large volumes of gas.

 In industry, they are used in cement kilns, incinerators, boilers, cracking units, sinter plants, furnaces, coke oven batteries, and a variety of other applications.

Continue…. Flat Plate Precipitators Smaller precipitators use flat plates instead of wires for high-voltage electrodes. The

flat plates increase the average electric field used to collect particles and provide additional surface area for particle collection. They are less susceptible to back corona than conventional plate-wire precipitators but also have higher rapping losses.

WET

Wet electrostatic precipitators are used to strip wet (saturated) gas streams of particles. They use water sprays to condition/trap particles for collection and also to clean the particles off collection surfaces. WESPs collect particulate matter not suitable for dry ESPs, including sticky, moist, flammable, explosive, or high resistivity solids. WESPs can also remove very fine (submicron) particulate that dry ESPs cannot capture effectively. The use of water also gives these devices gas scrubbing capabilities. Most wet precipitators are tubular designs.

 

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DRY

Used to capture particles in dry product streams. Use periodic rapping to separate the accumulated dust from the

collector plates and discharge electrodes. The dust layer (released by rapping) is collected in a hopper and then

removed by an ash handling system. Dry electrostatic precipitators are often not suitable for submicron

particulate applications because of particle size, resistivity, and other issues

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