electrostatic precipitation
- electrostatic precipitation
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▪ chemical process
method of removing certain impurities (either solid particles or liquid droplets) from air or other gas. It is widely used for removing particles from industrial-waste gases.
In 1824 M. Hohlfeld, a mathematics teacher in Leipzig, Ger., first described the precipitation of smoke particles by electricity. The first commercially successful process was developed in 1906 following experiments by F.G. Cottrell at the University of California, Berkeley.
When a discharge of electricity is fed into the air or gas, the particles it contains are ionized; i.e., they become negatively charged from the gain of electrons on their surfaces. A large electrode surface of opposite charge then attracts these particles, and they are deposited there for removal by washing or scraping.
The earliest applications were to the smelting and sulfuric acid industries and at cement mills. Other important applications include removal of tar from coke-oven gases; cleaning the air in air-conditioning systems; removal of acid fumes in petroleum refineries and chemical plants; recovery of such industrially valuable materials as the oxides of tin and copper; and removal of fly ash from stack gases of large coal-burning power plants.
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Universalium.
2010.
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electrostatic precipitation — elektrostatinis nusodinimas statusas T sritis chemija apibrėžtis Kietųjų dalelių ar skysčio lašelių atskyrimas iš dujų srauto elektriniame lauke. atitikmenys: angl. electrostatic precipitation rus. электростатическое осаждение … Chemijos terminų aiškinamasis žodynas
electrostatic precipitation — /əˌlɛktroʊstætɪk prəsɪpəˈteɪʃən/ (say uh.lektrohstatik pruhsipuh tayshuhn) noun a method of removing small particles of dust, smoke, oil, etc., from a gas, especially air, by first giving the particles an electrostatic charge and then passing the …
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electrostatic precipitation — Смотри электрическая газоочистка … Энциклопедический словарь по металлургии
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electrostatic precipitator — noun removes dust particles from gases by electrostatic precipitation • Syn: ↑precipitator, ↑Cottrell precipitator • Derivationally related forms: ↑precipitate (for: ↑precipitator) • Hypernyms: ↑ … Useful english dictionary
electrical precipitation — noun : electrostatic precipitation … Useful english dictionary
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electrostaticprecipitation — electrostatic precipitation Purified air is the byproduct of an electrostatic precipitator, in which an ionizer gives a positive charge to dirt particles which then adhere to a negatively charged collector. Precision Graphics n. The removal of… … Universalium
электрическая газоочистка — [electrostatic precipitation] частицы твердых примесей улавливаются под воздействием электрического поля в результате притягивания разноименно заряженных частиц пыли и фильтра. Электрические фильтры нашли широкое применение для тонкой очистки… … Энциклопедический словарь по металлургии
