Flue gas purification and adsorption device before desulfurization and denitrification

Abstract

The invention discloses a flue gas purification and adsorption device before desulfurization and denitrification, and relates to the technical field of industrial flue gas purification devices. The device comprises a middle ash collecting bin, an arch breaking unloader, a centrifugal fan, a plurality of long-bag low-pressure pulse bag-type dust removers, a blowing device and an ash storage bin, wherein the arch breaking unloader is mounted at the lower end of the middle ash collecting bin; a discharge port of the arch breaking unloader is connected with an air inlet of the long-bag low-pressure pulse bag-type dust collector through a connecting pipeline; one end of the connecting pipeline is connected with an air outlet of the centrifugal fan; an air inlet of the centrifugal fan is connected with a pipeline for conveying flue gas; and a mixing pipe section is arranged on the connecting pipeline. Through the designed flue gas purification and adsorption device before desulfurization anddenitrification, fine dust and small particles can be effectively controlled and tar in flue gas is adsorbed, so that the purpose of removing pollutants is completely achieved, the purpose of protecting the next procedure is achieved, and the problem that an existing multi-stage filter screen cannot filter out the small particles and the tar is solved.

Description

technical field [0001] The invention belongs to the technical field of industrial flue gas purification devices, and in particular relates to a flue gas purification and adsorption device before desulfurization and denitrification, which is mainly suitable for purification and adsorption of coke oven flue gas before low-temperature SCR denitration + new catalytic desulfurization process. Background technique [0002] SO in coke oven flue gas 2 , NO x , particulate matter, tar and other pollutants, and the temperature of the flue gas is 200-260°C. In general, a coke will The furnace corresponds to a set of desulfurization and denitrification reactors. The raw flue gas of the coke oven first enters the multi-stage filter for dust removal treatment to remove dust, tar, carbon black and other pollutants. Then it enters the SCR denitration reactor for denitration reactor. The denitration reactor is equipped with five layers of catalysts, and the four layers are normally used a...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a flue gas purification and adsorption device before desulfurization and denitrification, which can effectively control fine dust and small particles, absorb tar in the flue gas, completely realize the purpose of removing these pollutants, and achieve the purpose of protecting the next process. The problem that the existing multi-stage filter screen cannot filter out small particles and tar

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