Electrostatic Precipitator

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electrostatic precipitator

[i′lek·trə‚stad·ik prə′sip·ə‚tād· ər]
(engineering)
A device which removes dust or other finely divided particles from a gas by charging the particles inductively with an electric field, then attracting them to highly charged collector plates. Also known as precipitator.

Electrostatic Precipitator

 

a device used to remove liquid droplets or solid particles from an industrial gas by means of the ionization of the droplets or particles as the gas passes through a corona-discharge area and the subsequent precipitation of the droplets or particles on electrodes. In most cases, an electrostatic precipitator consists of a precipitator and a voltage source. The precipitator is a collecting chamber that contains corona-forming electrodes and collecting electrodes. The ionization area and the precipitation area may be either integrated or separated.

Electrostatic precipitators use only high-voltage (40-70 kilo-volts) direct current; the corona-forming electrodes are always connected to the negative terminal of the power supply. According to the state of the gas, electrostatic precipitators may be classified as wet or dry precipitators. In wet precipitators, the gas is saturated with moisture up to its dew point. According to the method of droplet or particle removal, a distinction is made between periodic and continuous precipitators. Electrostatic precipitators may operate at atmospheric pressure or at pressures above or below atmospheric pressure. The gas temperature may be as high as 500°C or even higher; the degree of gas cleaning may be as high as 99.9 percent.

Electrostatic precipitators are widely used to clean the flue gases of fossil-fuel-fired steam power plants. They are also used in, for example, ferrous and nonferrous metallurgy.

electrostatic precipitator

A device installed in flues, and the like, to prevent smoke and dust particles from escaping to the atmosphere; the particles are given an electric charge as they pass through a charged screen; then they are attracted to one of two electrically charged plates through which they pass; from time to time they are removed from the plates.
References in periodicals archive ?
Hsu, AirPol President, stated, "High removal efficiency and system reliability of the AirPol wet electrostatic precipitator are the two key criteria for this important selection by Lonza.
Geo Energy wet electrostatic precipitators, for both core and surface dryers, also contribute to environmental compliance.
The project also includes design of modifications to the quench chambers of the wet electrostatic precipitators (WESP) to improve access for cleaning and maintenance of the demisters or mist eliminators.
PPC, headquartered in Longview, Texas, designs, manufactures and installs dry and wet electrostatic precipitators and biofiltration devices for the pollution control industry.
SFM074 11/19/2001 11:30 r f bc-WA-MPM-Tech-Contract (SPOKANE) MPM Subsidiary Receives Order for Three Wet Electrostatic Precipitators
TurboSonic will supply its SonicKleen(TM) Wet Electrostatic Precipitators (WESPs) to control the emissions from three (3) single pass OSB dryers at Martco's green field OSB mill in Oakdale, LA.
Building on the successful Turbotak Wet Scrubbers and SonicKleen(TM) Wet Electrostatic Precipitators, the company gains greater flexibility to compete for a broader range of opportunities with the TurboVenturi Scrubber.