Composite electro-static dust-collector for cooperatively removing multipollutants in flue gas

Abstract

The invention discloses a composite Cottrell precipitator for synergistically removing various infectants in smoke gases, which has four high-voltage electricity discharging fields, wherein, a first electric field is a negative high-voltage direct-current electricity discharging field that is connected with a smoke gas inletting pipeline and used as advances collected dust collection level; a second electric field and a third electric field are both positive high-voltage pulse electricity discharging fields, and connected with the first direct-current electric field and used at the level of dust grain charging and the synergistic removing of various infectants in the smoke gases; a fourth electric field is a negative high-voltage direct-current electricity discharging field that is positioned behind the third positive high-voltage pulse electricity discharging field and used at the coagulation dust collection level. The composite Cottrell precipitator for synergistically removing various infectants in the smoke gases can improve the removing capacity of inhalable particulates especially nanophase particulates, effectively oxidize and remove the content of sulfur dioxide, nitrogen oxide and zerovalent mercury in the smoke gases, reduce the toxicity of the smoke gases, and implement the integrated and synergistic removing of various infectants in the smoke gases by combining with a solution absorption method.

Description

technical field [0001] The invention relates to an electrostatic precipitator, in particular to a composite electrostatic precipitator for synergistic removal of multiple pollutants in flue gas. Background technique [0002] Coal is the main source of electricity in our country. In the foreseeable next few decades, coal-fired thermal power generation will occupy a dominant position in my country's power industry for a long time. This long-term energy structure that relies on coal-fired power generation has caused serious environmental pollution. The soot and gaseous pollutants emitted by coal-fired power plants, such as SO 2 , NO x And mercury has become an important source of pollution that destroys my country's atmospheric environment. Smoke and dust emitted by coal-fired power plants is one of the important sources of inhalable particulate matter in the atmosphere. Inhalable particulate matter, especially particulate matter (PM2.5) with a diameter of less than 2.5 micr...

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Problems solved by technology

Respirable particulate matter entering the atmosphere can cause many environmental and health problems

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