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High purification method of industrial tail gas containing oxynitride

A technology for industrial tail gas and nitrogen oxides, which is applied in chemical instruments and methods, separation methods, and separation of dispersed particles, etc., to achieve the effects of increasing oxidation rate, high operating flexibility, and reducing treatment costs

Inactive Publication Date: 2012-04-04
太原市恒远化工环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem that the existing dry or wet treatment methods of industrial waste gas containing nitrogen oxides have the above-mentioned different shortcomings, the present invention provides a method for highly purifying industrial tail gas containing nitrogen oxides

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  • High purification method of industrial tail gas containing oxynitride
  • High purification method of industrial tail gas containing oxynitride
  • High purification method of industrial tail gas containing oxynitride

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Example 1: The industrial tail gas treatment capacity is 3000m 3 / h, the inlet concentration of nitrogen oxides is 1000mg / m 3

[0027] A method for highly purifying industrial tail gas containing nitrogen oxides, such as figure 1 As shown, comprise the following steps: the industrial tail gas containing nitrogen oxide enters in the oxidation reactor 2 that is filled with immobilized metal porphyrin catalyst 1 from the top, and the volume content of the industrial tail gas containing nitrogen oxide entering the oxidation reactor accounts for the total amount of the reactor. 5% of volume. The metal atom M of the immobilized metalloporphyrin catalyst can be a transition metal Co or Cu, and the substituent R in the structural formula 1 , R 2 , R 3 It can be hydrogen, and the carrier is silica gel or molecular sieve; the residence time of the industrial tail gas containing nitrogen oxides passing through the oxidation reactor filled with metal porphyrin catalyst is 0.1 ...

Embodiment 2

[0028] Example 2: The industrial tail gas treatment capacity is 5000m 3 / h, the inlet concentration of nitrogen oxides is 5000mg / m 3

[0029] A method for highly purifying industrial tail gas containing nitrogen oxides, such as figure 1 As shown, comprise the following steps: the industrial tail gas containing nitrogen oxide enters in the oxidation reactor 2 that is filled with immobilized metal porphyrin catalyst 1 from the top, and the volume content of the industrial tail gas containing nitrogen oxide entering the oxidation reactor accounts for the total amount of the reactor. 5-21% of the volume. The metal atom M of the immobilized metalloporphyrin catalyst can be a transition metal Ni or Zn, and the substituent R in the structural formula 1 , R 2 , R 3 It can be alkoxyl or hydroxyl, and the carrier is zeolite or sepiolite or porous ceramics; the residence time of industrial tail gas containing nitrogen oxides through the oxidation reactor filled with metal porphyrin ...

Embodiment 3

[0030] Example 3: The industrial tail gas treatment capacity is 10000m 3 / h, the inlet concentration of nitrogen oxides is 6000mg / m 3

[0031] A method for highly purifying industrial tail gas containing nitrogen oxides, such as figure 1As shown, comprise the following steps: the industrial tail gas containing nitrogen oxide enters in the oxidation reactor 2 that is filled with immobilized metal porphyrin catalyst 1 from the top, and the volume content of the industrial tail gas containing nitrogen oxide entering the oxidation reactor accounts for the total amount of the reactor. 5-21% of the volume. The metal atom M of the immobilized metalloporphyrin catalyst can be a transition metal Fe or Mn, and the substituent R in the structural formula 1 ,R 2 ,R 3 It can be a hydrocarbon group, and the carrier is polyvinyl chloride or polystyrene; the residence time of the nitrogen oxide-containing industrial tail gas passing through the oxidation reactor filled with a metalloporp...

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Abstract

The invention relates to a purification technique of an industrial tail gas, in particular to a high purification method of an industrial tail gas containing oxynitride, which solves the problem that the traditional dry methods or wet methods have different disadvantages respectively. The industrial tail gas containing oxynitride enters an oxidation reactor filled with an immobilized porphyran catalyst from the top of the oxidation reactor; dioxygen in the industrial tail gas is activated by the porphyran catalyst so that the nitric oxide gas is converted into a nitrogen dioxide gas; the industrial tail gas containing nitrogen dioxide gas enters the bottom of an absorber from the bottom of the oxidation reactor and comes into contact with dilute nitric acid which enters from the top of the absorber; the nitrogen dioxide is absorbed to generate nitric acid; and the industrial tail gas after being absorbed is discharged from the top of the absorber. The porphyran is used as an oxidationcatalyst of the industrial tail gas containing oxynitride for the first time, the dioxygen in the industrial tail gas is activated to promote the nitrogen oxide to be converted into nitrogen dioxide,the oxidizability of the oxynitride is enhanced, and the size of an oxidation and absorption device of oxynitride is reduced by absorption with a wet method.

Description

technical field [0001] The invention relates to an industrial tail gas purification technology, in particular to a method for highly purifying industrial tail gas containing nitrogen oxides. Background technique [0002] Industries such as nitric acid production and nitric acid use often discharge industrial tail gas containing nitrogen oxides. The direct discharge of this kind of tail gas not only causes harm to the health of residents, but also seriously damages the ecological environment. It is one of the pollution gases that countries need to control. [0003] The treatment methods of exhaust gas containing nitrogen oxides mainly include dry method and wet method. The dry method includes selective (or non-selective) catalytic reduction method, activated carbon adsorption method and plasma electron beam irradiation method. Among them, the reduction method is divided into catalytic reduction method and non-catalytic reduction method. Patent 200410102301 discloses that the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/75B01D53/86B01D53/78B01D53/56
Inventor 王燕萍
Owner 太原市恒远化工环保科技有限公司
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