Method for removing odor organic gas

A technology for organic gas and odor, applied in separation methods, chemical instruments and methods, and separation of dispersed particles, etc., can solve the problems of secondary pollution, high fuel costs, etc., and achieve low requirements for operating equipment, simple operation, and low consumption Effect

Active Publication Date: 2015-07-22
牛小夺
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Direct combustion is effective for high-concentration odor, but the fuel cost is high, and there is SO in the gas after combustion 2 Chemical composition, easy to cause secondary pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1, a kind of method that removes the organic gas that has foul smell, this method is applicable to 2-methyl sulfide, mercaptan, thiophenol organic gas, and its steps are as follows:

[0021] (1) Prepare a mixed solvent containing alcohol, prepare a mixed inorganic metal salt; then prepare an absorption solution according to the mass ratio of mixed solvent: mixed inorganic metal salt 1:0.02; the mixed solvent is selected from methanol, ethanol, isopropanol, A mixed solvent composed of at least two of n-butanol, N.N-dimethylformamide, and dimethyl sulfoxide, and the mixed solvent contains at least one of methanol, ethanol, isopropanol, and n-butanol; The mixed inorganic metal salt is selected from at least 2 kinds of mixed inorganic metal salts consisting of sulfate and chloride salts;

[0022] (2) Turn on the stirring, pass 2-methyl sulfide, mercaptan, and thiophenol organic gases with odor into the container containing the absorption solution, and absorb at 2...

Embodiment 2

[0024] Embodiment 2, a kind of method that removes the organic gas with foul smell, this method is applicable to 2-methyl sulfide, mercaptan, thiophenol organic gas, and its steps are as follows:

[0025] (1) Prepare a mixed solvent containing alcohol, prepare a mixed inorganic metal salt; then prepare an absorption solution according to the mass ratio of mixed solvent: mixed inorganic metal salt 1:0.08; the mixed solvent is selected from methanol, ethanol, isopropanol, A mixed solvent composed of at least two of n-butanol, N.N-dimethylformamide, and dimethyl sulfoxide, and the mixed solvent contains at least one of methanol, ethanol, isopropanol, and n-butanol; The mixed inorganic metal salt is selected from at least 2 kinds of mixed inorganic metal salts consisting of sulfate and chloride salts;

[0026] (2) Turn on the stirring, pass 2-methyl sulfide, mercaptan, and thiophenol organic gases with odor into the container containing the absorption solution, and absorb at 25°C~...

Embodiment 3

[0028] Embodiment 3, a kind of method for removing the organic gas with foul smell, this method is applicable to 2-methyl sulfide, mercaptan, thiophenol organic gas, and its steps are as follows:

[0029] (1) Prepare a mixed solvent containing alcohol, prepare a mixed inorganic metal salt; then prepare an absorption solution according to the mass ratio of mixed solvent: mixed inorganic metal salt 1:0.05; the mixed solvent is selected from methanol, ethanol, isopropanol, A mixed solvent composed of at least two of n-butanol, N.N-dimethylformamide, and dimethyl sulfoxide, and the mixed solvent contains at least one of methanol, ethanol, isopropanol, and n-butanol; The mixed inorganic metal salt is selected from at least 2 kinds of mixed inorganic metal salts consisting of sulfate and chloride salts;

[0030] (2) Turn on the stirring, pass 2-methyl sulfide, mercaptan, and thiophenol organic gases with odor into the container containing the absorption solution, and absorb at 25°C~...

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PUM

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Abstract

The invention discloses a method for removing an odor organic gas, which is applicable to 2-dimethyl sulfide organic gas, thioalcohol organic gas, and thiophenol organic gas. The method comprises the following steps of: preparing a solvent mixture comprising an alcohol, and preparing an inorganic metal salt mixture from the solvent mixture and an inorganic metal salt mixture at the mass ratio of 1:0.02-0.08; starting stirring and introducing the odor 2-dimethyl sulfide organic gas, the odor thioalcohol organic gas, and the odor thiophenol organic gas into a container with an absorption solution; when the solution is saturated by absorption, distilling the absorption solution for recycling, and supplementing the inorganic metal salt mixture for recycling. The method disclosed by the invention is simple to operate, low in requirements for running equipment, and good in odor removal effect for the odor 2-dimethyl sulfide organic gas, the odor thioalcohol organic gas, and the odor thiophenol organic gas. The use amount of the inorganic metal salt is less, the solvent can be recycled, and finally, the black and odorless inorganic metal salt waste can be dehydrated and subjected to deep landfill treatment.

Description

technical field [0001] The invention relates to a waste gas treatment method, in particular to a method for removing an odorous organic gas. Background technique [0002] With the development of society, the impact of odorous gases produced by pesticide plants, chemical plants and sewage plants has become increasingly significant. 2-Methylsulfide and mercaptan organic gases contain a strong odor, and are common exhaust gases in modern chemical production, causing serious environmental pollution. The existing main methods for removing 2-methyl sulfide, mercaptans, and thiophenols with odorous organic gases are as follows: [0003] 1. Alkaline method: Put the odorous organic gas into the NaOH solution for washing, and the odorous 2-methyl sulfide and mercaptan can be 、 Thiophenol washes off. The main reactions that occur during alkaline cleaning: [0004] h 2 S+NaOH=NaHS+H 2 o [0005] h 2 S+2NaOH=Na 2 S+2H 2 o [0006] Na 2 S+H 2 S=2NaHS [0007] RSH+NaOH=RSNa+...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/14
Inventor 张久彦秦宁傅咏梅毛庆磊严飞飞李佳谨张辉
Owner 牛小夺
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