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 ?
Particle emissions from small scale wood combustion devices and their control by electrostatic precipitation, Chemical Engineering Transactions 22: 119-124.
XII International Conference on Electrostatic Precipitation, ICESP Nurnberg.
Using electrostatic precipitation to control diesel exhaust particulate emissions.
Electrostatic Precipitation Technologies for the Mitigation of Particulate Matter Emissions from Poultry Facilities.
Results showed that poultry PM was easier to capture by electrostatic precipitation compared to standard fine road dust.
In the first phase, two air cleaners were evaluated for their single-pass filtration efficiency, one based on the high-efficiency particulate absorbing (HEPA) filtration mechanism and one using electrostatic precipitation (ESP).
As such, the electrostatic precipitation and flue gas desulphurization markets will offer the most potential for the future, followed closely by bag filters, and scrubbers.
The major products analyzed under the Product By Technology segment are Stand-Alone Air Purification Equipment (Media Combinations, Electrostatic Precipitation (ESP), Plasma, & Others); and Induct Air Purification Equipment (Media Combinations, Ultra Violet, Electrostatic recipitation (ESP), Photo Catalytic Oxidation (PCO), & Others).
Table 3: Technologies and their Efficiencies in Removing Air Borne Contaminants (includes corresponding Graph/Chart) II-23 Types of Air Purifiers II-23 Stand-Alone Purification Equipment II-23 Media Combination Based Stand-Alone Air Purification Equipment II-24 Electrostatic Precipitation Based Stand-Alone Air Purification Equipment (ESP) II-24 Plasma-Based Stand-Alone Air Purification Equipment II-24 Other Stand-Alone Air Purification Equipment II-24 End-Use II-25
Integrated Gasification, High Temperature Flue Gas Conditioning, Clean Coal Technology, Avoiding CO2 Emissions, Fuel Processing, Membrane-Based Separations, Water Reuse and Treatment, Hg Removal, Electrostatic Precipitation and Standardization Society Test Methods.
He holds patents in electrostatic precipitation (licensed) and greenhouse gas control.
David Bayless, of Ohio University, Department of Mechanical Engineering, holds patents in electrostatic precipitation (licensed) and greenhouse gas control.

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