Nitric oxide waste gas pollution control process method and equipment

A technology for treating nitrogen oxides and exhaust gas, applied in chemical instruments and methods, separation methods, and separation of dispersed particles, can solve the problems of low absorption and purification efficiency, difficult absorption liquid treatment, and high operating costs, and achieve the goal of overcoming alkali consumption Large, reduce secondary pollution, improve the effect of treatment efficiency

Inactive Publication Date: 2015-01-07
天津市嘉腾环保设备股份有限公司
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AI Technical Summary

Problems solved by technology

In particular, high-concentration nitrogen oxides use alkali absorption technology, which not only consumes a lot of alkali (usually sodium hydroxide), but also has high operating costs, and the absorption and purification efficiency is not high, and the absorption liquid is difficult to handle.

Method used

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  • Nitric oxide waste gas pollution control process method and equipment
  • Nitric oxide waste gas pollution control process method and equipment

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Embodiment Construction

[0020] In order to further understand the invention content, characteristics and effects of the present invention, the following examples are given, and detailed descriptions are as follows in conjunction with the accompanying drawings:

[0021] see figure 1 , a nitrogen oxide exhaust gas treatment process, characterized in that: the method includes the following steps:

[0022] a. Use water as the absorbing liquid to spray the waste gas in two layers. This step will produce the first spray recovery liquid; dehydrate the waste gas after spraying in this step;

[0023] b. Use water as the absorption liquid to carry out two-layer circular spraying on the waste gas produced in step a. This step will produce the second spray recovery liquid; dehydrate the waste gas after spraying in this step; The drenched recovered liquid is introduced into the first sprayed recovered liquid in step a;

[0024] c. Use water as the absorption liquid to carry out two-layer circular spraying on th...

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Abstract

The invention relates to a nitric oxide waste gas pollution control process method and equipment. The nitric oxide waste gas pollution control process method comprises a first-stage backwashing process, a second-stage backwashing process and a third-stage backwashing process; waste gas is sequentially washed through the first-stage backwashing process, the second-stage backwashing process and the third-stage backwashing process, dilute nitric acid can be recycled in the backwashing processes, and dry-method absorption is performed on the waste gas after subjected to three-stage backwashing. According to the nitric oxide waste gas pollution control process method, the concentration of nitric oxide in waste gas is substantially reduced on the premise that nitric acid is recycled, and waste gas is absorbed by virtue of a dry-method adsorbent so that emission of nitric acid on standard can be ensured; deficiencies of a known existing alkali absorption process method are overcome; nitric acid is recycled; alkali or additive is omitted, and the operation cost of waste gas treatment is lowered; the pollution control difficulty of high-concentration nitric oxide is reduced; the waste gas pollution control rate is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of environmental protection treatment equipment, and in particular relates to a nitrogen oxide waste gas treatment process method and equipment. Background technique [0002] At present, in the nitrogen oxide waste gas treatment process, regardless of the concentration, the alkali absorption process is generally used. Especially for high-concentration nitrogen oxides, the alkali absorption process is used, which not only consumes a lot of alkali (usually sodium hydroxide), but also has high operating costs, and the absorption and purification efficiency is not high, and the treatment of the absorption liquid is difficult. Contents of the invention [0003] In order to solve the technical problem of nitric acid recovery in the treatment of nitrogen oxides in the known technology, the invention designs a kind of recovery and reuse of nitric acid, which can avoid the use of alkali and additives, reduce the op...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/96B01D53/56
Inventor 云凤刚
Owner 天津市嘉腾环保设备股份有限公司
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