Wet desulfurization, denitrification and dust removal integrated method and device

Abstract

The invention discloses a process and device for wet desulfurization, denitrification and dust removal, which is characterized in that a slurry pool, an inlet flue, a rough dust collector, a first-stage desulfurization spray layer, and a first-stage gas-raising are arranged in the shell of the absorption tower from bottom to top. Liquid collector, denitrification spray layer, two-stage gas-lift liquid collector, two-stage desulfurization spray layer, three-stage gas-lift liquid collector, high-efficiency dust collector, high-efficiency dust collector flushing layer, mist eliminator and mist eliminator flushing layer, outside the shell of the absorption tower, there are slurry pumps, overflow pipes, denitrification liquid collection tanks, denitrification pumps, denitrification slurry return pipes, desulfurization liquid collection tanks, desulfurization pumps, desulfurization slurry return pipes, dust collection liquid collection boxes, flushing pumps, dust removal slurry The return pipe, the present invention has good effect of simultaneous desulfurization, denitrification and dust removal, good gas-liquid mass transfer effect, large gas circulation space without blockage, less investment, small footprint, stable and reliable operation, simple structure and low cost, convenient installation and maintenance, etc. advantage.

Description

technical field [0001] The invention relates to a flue gas purification and absorption device and method, in particular to a process and device integrating desulfurization, denitrification and dust removal with good desulfurization, denitrification and dust removal effects and good gas-liquid mass transfer effect. Background technique [0002] With the rapid development of my country's industrial economy, the growth of energy consumption is also accelerating. Among them, industrial production using coal as the main fuel releases a large amount of NOx, SO 2 , dust and other toxic and harmful gases, causing air pollution. With the seriousness of industrial pollution and the enhancement of human awareness of environmental protection, the purification of industrial waste gas has received more and more attention in our country, and it should be treated with desulfurization, denitrification and dust removal. [0003] At present, the denitrification methods of industrial waste ga...

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Problems solved by technology

[0007] The purpose of the present invention is to overcome the deficiencies of the prior art, to propose a device and process that can simultaneously complete high-efficiency desulfurization, denitrification and dust removal in the absorption tower, and to solve the problem that one tower cannot simultaneously desulfurize, denitrify and dust remove, the efficiency of desulfurization, denitrification and dust removal is low, and the liquid-gas ratio Large, high equipment loss and operating costs, poor gas-liquid mass transfer effect, etc.

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