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Treatment method of waste gas containing nitride oxides

A technology of nitrogen oxides and treatment methods, which is applied in chemical instruments and methods, separation methods, and separation of dispersed particles, etc., can solve the problems of inability to remove nitrogen oxides and low treatment effect of nitrogen oxides, and achieve the effect of improving treatment efficiency

Inactive Publication Date: 2017-08-11
SHANGHAI SHENGJIAN ENVIRONMENTAL SYST TECH
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Problems solved by technology

[0004] However, the traditional alkaline washing and neutralization treatment process has a low treatment effect on nitrogen oxides in chemical tail gas, especially for nitrogen monoxide NO, which is insoluble in water, and the traditional alkaline washing neutralization treatment process cannot remove it at all.

Method used

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  • Treatment method of waste gas containing nitride oxides
  • Treatment method of waste gas containing nitride oxides
  • Treatment method of waste gas containing nitride oxides

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Experimental program
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Embodiment

[0071] according to figure 1 In the process flow shown, the gas is drawn into the three-stage wet (packed) scrubber through the fan, and under the condition of pH value of 5-6, the waste gas containing nitrogen oxides is oxidized and washed (the first stage of washing) to obtain The first scrubbing gas; the first scrubbing gas is subjected to reduction water washing (second stage scrubbing) to obtain the second scrubbing gas; the second scrubbing gas is subjected to oxidation and deodorization water washing (third stage scrubbing) to obtain purification treatment The gas is discharged through the chimney.

[0072] Dosing through the treatment agent addition device: add NaOH, NaClO in the first scrubber 2 ; NaOH, NaHS are added to the second washing tower; NaOH and NaClO are added to the third washing tower. Each washing section adopts tap water spray purification treatment; in addition, the present invention cooperates with an automatic dosing device to make the entire dosin...

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Abstract

The invention provides a treatment method of waste gas containing nitride oxides. The method includes the following steps that firstly, the waste gas containing the nitride oxides is subjected to oxidization washing to obtain a first washed gas, wherein the oxidization washing uses chemicals including chlorite and a first soluble alkaline substance; secondly, the first washed gas is subjected to reduction washing to obtain a second washed gas, wherein the reduction washing uses chemicals including sodium bisulfide and a second soluble alkaline substance; thirdly, the second washed gas is subjected to oxidization and deodorization washing to obtain purified treated gas, wherein oxidization and deodorization washing uses chemicals including hypochlorite and a third soluble alkaline substance. The oxidization, reduction and oxidization treatment technical process is developed according to the waste gas containing the nitride oxides, and the treatment process can effectively improve the treatment efficiency of the nitride oxides at normal temperature and normal pressure.

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. 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 produced by the chemical...

Claims

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Application Information

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IPC IPC(8): B01D53/78B01D53/56
Inventor 张伟明黄江华
Owner SHANGHAI SHENGJIAN ENVIRONMENTAL SYST TECH
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