Electrostatic precipitation

Japanese: 電気集塵 - でんきしゅうじん（英語表記）electrostatic precipitation

Dust collection using the action of electricity is generally called electrostatic precipitator. In industry, electrostatic precipitators are widely used, which charge fine particles in gas with corona discharge and collect the fine particles on an electrode with the static electricity of a high-voltage electric field. The principle is that a flat conductive dust collecting electrode and a thin conductive discharge electrode are placed opposite each other, and the positive pole is connected to the collecting electrode and the negative pole to the discharge electrode. When a high DC voltage is applied, the electric field on the surface of the discharge electrode becomes strong. When gas is passed between these two electrodes, a corona discharge occurs near the surface of the discharge electrode, which fills most of the space between the two electrodes with negative charges. Particles that pass through this area are negatively charged and collect on the collecting electrode. This method was invented by FG Cotterell in 1906, so it is also called the Cotterell dust collector after his name. This device uses electrostatic force, so there is little gas pressure loss and has a high dust collection capacity, but the equipment costs are high. (→ Dust collector)

Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information

Japanese:

電気の作用を利用した集塵操作を一般に電気集塵といい，工業的には，ガス中の微粒子をコロナ放電によって荷電させ，高圧電界による静電気の力で電極に微粒子を集める電気集塵装置が広く用いられている。その原理は，平板な導体の集塵極と細い導体の放電極を対向させ，集塵極に正，放電極に負の極を接続し，直流高電圧を加えると，放電極の表面の電界は強力になる。この両極間にガスを流すと放電極表面付近でコロナ放電が起り，これによって両極間の大部分は負の電荷で充満され，ここを通る粒子は負に帯電して集塵極に集るわけである。この方式は 1906年に F.G.コットレルによって発明されたので，その名をとってコットレル集塵装置ともいわれる。この装置は，静電気力によるためガスの圧力損失が少く，高い集塵能力をもつが，設備費が高くつく。 (→集塵装置 )

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