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Method for treating exhaust gas containing nitrogen oxides and volatile acids

A technology of nitrogen oxides and volatile acids, applied in chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve the problems of inability to deal with volatile acids and low treatment effect

Inactive Publication Date: 2019-04-16
SHANGHAI SHENGJIAN ENVIRONMENTAL SYST TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the traditional alkaline washing and neutralization treatment process has a low effect on the treatment of nitrogen oxides and volatile acids in chemical tail gas. Although some studies have given methods that can effectively treat nitrogen oxides in chemical tail gas, they cannot deal with Volatile acids that exist at the same time as oxides, and the phenomenon of white smoke formed when exhaust gas is emitted

Method used

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  • Method for treating exhaust gas containing nitrogen oxides and volatile acids
  • Method for treating exhaust gas containing nitrogen oxides and volatile acids
  • Method for treating exhaust gas containing nitrogen oxides and volatile acids

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Embodiment

[0099] The exhaust gas containing nitrogen oxides and volatile acids is oxidized and washed at a pH value of 5 to 6 at normal temperature and pressure to obtain the first scrubbing gas; the medicament used in the oxidized water washing includes KClO with a mass concentration of 10%. 2 aqueous solution and an aqueous solution with a mass concentration of 15% NaOH.

[0100] The first scrubbing gas is introduced into the humidification bellows through the booster fan, atomized and humidified at room temperature, and after reaching the saturated humidity (relative humidity is 100%), it is pumped, dispersed, and collided by the booster fan to obtain the processed first scrubber. A scrubbing gas; the particle size of the treated first scrubbing gas is ≥0.5 μm;

[0101] The first scrubbing gas after the treatment is subjected to reduction water washing at normal temperature and pressure to obtain the second scrubbing gas; the medicament used in the reduction water washing includes Na...

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Abstract

The invention provides a method for treating an exhaust gas containing nitrogen oxides and volatile acids. The method comprises the steps of A) oxidizing and washing the exhaust gas containing the nitrogen oxides and the volatile acids at a pH of 5-6 to obtain a first washing gas, wherein an oxidized and water-washed medicament comprises a chlorite solution and first alkali liquid; B) after the first washing gas is atomized and humidified, conducting collision and dissipating to obtain a treated first washing gas having a particle diameter greater than or equal to 0.5 micrometer; C) reducing and water-washing the treated first washing gas to obtain a second washing gas, wherein a reduced and water-washed medicament comprises a reducing agent solution and second alkali liquid; D) conductingoxidation, deodorization and washing on the second washing gas to obtain a third washing gas, wherein an oxidized, deodorized and water-washed medicament comprises a hypochlorite solution and third alkali liquid; E) filtering the third washing gas, and controlling a filtration precision to be 0.5-2 micrometers to obtain a purified treated gas. The method can remove the volatile acids and the nitrogen oxides efficiently, and have no white smoke phenomenon.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a method for treating waste gas containing nitrogen oxide compounds and volatile acids. Background technique [0002] With the increasingly serious environmental problems, environmental protection and pollution treatment have received more and more attention. Air pollution is extremely serious in environmental pollution, and air pollution is extremely harmful to human body, animals, plants and climate. There are many factors that cause air pollution, such as smoke from industry, domestic stoves and heating boilers, transportation and forest fires. Among them, industrial pollution is an important source of air pollution. [0003] With the rapid development of the electronic industry, liquid crystal panel industry and optoelectronic industry at home and abroad, the types and amounts of chemicals used are also increasing, and the treatment of the exhaust gas produ...

Claims

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Application Information

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IPC IPC(8): B01D53/78B01D53/56B01D53/40
CPCB01D53/40B01D53/56B01D53/78B01D2251/108B01D2251/304B01D2251/60
Inventor 张伟明黄江华汪哲
Owner SHANGHAI SHENGJIAN ENVIRONMENTAL SYST TECH
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