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Method for processing nitrogen oxide exhaust

A technology for treating nitrogen oxides and waste gas, which is applied in the direction of chemical instruments and methods, separation methods, and dispersed particle separation, can solve the problems of low treatment cost and insignificant treatment effect, and achieve low cost, stable reduction treatment solution, and improved Effects of Processing Effects

Inactive Publication Date: 2009-09-16
CHONGQING POLYCOMP INT
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Chen Fuli invented a nitrogen oxide waste gas treatment liquid—patent number 00114647.5. Although this method has simple equipment and low treatment costs, but because he only uses a single tower to absorb nitrogen oxides, the treatment effect is not significant

Method used

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  • Method for processing nitrogen oxide exhaust
  • Method for processing nitrogen oxide exhaust

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Embodiment Construction

[0019] Combine below figure 1 The present invention is further described as follows with examples.

[0020] Depend on figure 1 It can be seen that the nitrogen oxide waste gas is first oxidized and absorbed in the oxidation tower A, and then reduced in the reduction tower B. Nitrogen oxide waste gas is pumped into the bottom of the treatment tower through the fan 1 and the exhaust pipe 2. The waste gas moves upward through the multi-faceted hollow filler 4 from bottom to top, and the treatment liquid is pressed into the treatment tower by the water pump 7 through the water spray pipe 6 and the nozzle 5. In the tower, the treatment liquid sprayed downward through the nozzle 5 fully contacts and reacts with the countercurrent waste gas, and after stratified treatment, the treatment liquid flows back into the treatment liquid storage tank 3, and the treated waste gas is discharged into the atmosphere through the exhaust pipe 8.

[0021] See Table 1 for the formulations of the t...

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Abstract

The invention discloses a method for processing nitrogen oxide exhaust, including: carrying out two steps, in combined manner, as oxidation and recovery to nitrogen oxide exhaust using special oxidation treating fluid and special recovery treating fluid, that is, the nitrogen oxide residual exhaust processed by oxidation tower is further processed via a recovery tower. Formulation and constituent of the oxidation treating fluid are as follows: NaCIO 10%-20%; NaOH 10%-20%; NANO3 0.01%-1%; H2O allowance. Formulation and constituent of the recovery treating fluid are as follows: Na2S2O3 1%-10%; NaOH10%-25%; H2O allowance. Through this invention, the processed exhaust has neither distinct odor nor distinct colour, which meets exhaust discharge requirement in PRC emission standard of air pollutants GB16297-1996. Further, it is low in treating fluid cost and stable, and the fluid prepared at a time can be utilized for 2 months.

Description

technical field [0001] The invention relates to a waste gas treatment method, in particular to a method for treating nitrogen oxide waste gas by combining two steps of oxidation and reduction. Background technique [0002] In the chemical industry, such as nitrogen fertilizer production and platinum purification process, a large amount of nitrogen oxide waste gas is produced due to the production and use of a large amount of concentrated nitric acid. These waste gases bring great harm to the earth's ecological environment and human health. It is not only acid rain One of the main sources of NO, but also a carcinogen, in addition NO x It also damages the ozone layer. Therefore, nitrogen oxide exhaust gas must be treated before it can be discharged. The data point out that the current methods for dealing with nitrogen oxide exhaust gas are: 1. Catalytic decomposition method. NO is directly converted to x decomposed into N 2 and O 2 , this method requires the use of noble...

Claims

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Application Information

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IPC IPC(8): B01D53/56B01D53/75B01D53/78
Inventor 刘伟廷王流兴彭辉
Owner CHONGQING POLYCOMP INT
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