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 ?
EEC's Mid-Atlantic center received a contract from Virginia Power for the comprehensive refurbishment of an electrostatic precipitator located at their Chesterfield Power Station.
The other project consists of the addition of an electrostatic precipitator to reduce the emissions from a chemical recovery boiler.
The second award was received from Westvaco Corporation for their mill in Wickliffe, Kentucky, to modify an existing electrostatic precipitator in order to reduce emissions.
Ljusdal Energy Ltd intends to supplement its current production by one (1) piece of electrostatic precipitators to existing boiler and one (1) piece of electrostatic precipitators for a new boiler.
Environmental Elements Corporation, a leading air pollution control systems provider for almost fifty years, designs and supplies electrostatic precipitator, fabric filter, flue gas desulfurization, and acid gas cleaning systems.
The complex also features an on-site desalination plant for the facility's water needs, low NOx burners, a flue gas scrubber and electrostatic precipitators.
The new contract comes just five months after Alstom was picked to supply 5 x 620 MW steam turbine, generators, supercritical boilers as well as electrostatic precipitators and flue gas desulphurisation systems for the Yanbu 3 plant in Saudi Arabia.
Bengbu Environmental Protection Equipment Company, a locally owned manufacturer of electrostatic precipitators for more than 20 years, is located in Bengbu, Anhui Province, China.
FWEC will supply the arch-fired boilers, the firing system including bunkers, coal feeders and pulverizers, coal burners with oil igniters, boiler and mill bay structures and enclosures, air/flue gas duct system including fans/air heaters, and electrostatic precipitators.
Tenders are invited for Retrofitting of Electrostatic Precipitators (ESPs) of2x 200 MW Unit No.
Bengbu Environmental Protection Equipment Factory, an established manufacturer of electrostatic precipitators for the power and cement industries, is located in Anhui Province, which is in East Central China, near Shanghai.

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