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Rapper (electrostatic precipitation)
Rappers are used to transmit strong shearing forces to collecting plates in order to release deposited dust particles. Rapping is the process by which electrodes and particles are broken apart by vibrations from the rappers. Often used in electrostatic precipitators, rappers relapse the caked on dust layer which then descends into a hopper. Number, size, and frequency of the rappers vary from system to system based upon the specific characteristics of the dust being collected.
== Rappers & Precipitators ==
Typically such vibrators are employed in conjunction with electrostatic precipitators. Precipitators contain sheet metal collector electrode plates. Vertically suspended discharge electrode wires are located between the plates. As a gas stream, often discharged from an industrial process, flows through the precipitator, air particulates are ionized by the electrode wire. The ionized particles then are attracted to the positively grounded plate, creating a layer of caked on dust particles. Rappers are responsible for Transmitting vibrations to the electrodes causing deposited dust particles to break loose and fall into a hopper located below the precipitator.〔http://books.google.com/patents?id=kP50AAAAEBAJ&printsec=abstract&zoom=4#v=onepage&q&f=false〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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