Treatment process and device of waste gas containing hydrogen sulfide and carbon dioxide

A waste gas treatment device, carbon dioxide technology, applied in the direction of alkali metal sulfide/polysulfide, calcium carbonate/strontium/barium, chemical instruments and methods, etc., can solve the problem of increasing carbon dioxide emissions, adverse environmental effects, and reducing the use of hydrogen sulfide Value and other issues, to achieve the effect of benefit optimization, good economic and environmental benefits, and good social benefits

Inactive Publication Date: 2011-05-18
LIAOCHENG LUXI CHEM ENG DESIGN
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  • Application Information

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Problems solved by technology

It not only reduces the use value of hydrogen sulfide, but also increases the emission of carbon dioxide, causing adverse effects on the environment

Method used

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  • Treatment process and device of waste gas containing hydrogen sulfide and carbon dioxide
  • Treatment process and device of waste gas containing hydrogen sulfide and carbon dioxide

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Embodiment Construction

[0014] A waste gas treatment device containing hydrogen sulfide and carbon dioxide, comprising a multi-stage carbon removal tower 3 connected to the waste gas pipe 1, the upper end of the carbon removal tower 3 is connected to an alkali washing tower 4 through a pipeline, and an exhaust port is arranged at the upper end of the alkali washing tower 4, The lower end is connected to the crystallizer 6 through the evaporator 5, and the crystallizer 6 is connected to the centrifuge 7; the lower end of the carbon removal tower 3 is connected to the storage tank 9, and the storage tank 9 is connected to the centrifuge 7. Process flow of waste gas treatment containing hydrogen sulfide and carbon dioxide:

[0015] 1. Processing carbon dioxide to produce barium carbonate

[0016] Use industrial barium sulfate calcined material as raw material, dissolve it in water and stir to separate the solid and liquid, and make a relatively clean 20% barium sulfide solution, mix the carbon dioxide a...

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Abstract

The invention discloses treatment process and device of a waste gas containing hydrogen sulfide and carbon dioxide. The treatment process comprises the following steps of: firstly decarbonizing the waste gas through a multilevel barium sulfide solution; then carrying out alkali wash through a sodium hydroxide solution, and then emptying; separating sediments generated after decarbonization to obtain a barium carbonate product; recycling mixed liquor generated after the decarbonization; and evaporating, crystallizing and separating a solution obtained by alkali wash to obtain a sodium sulfide product. The treatment process and device provided by the invention have simple process flow, cannot only directly produce the barium carbonate by utilizing CO2 contained in a mixed gas, but also produce an H2S gas needed by next step reaction through reaction, thereby not only consuming the carbon dioxide gas contained in the mixed gas, but also obtaining a hydrogen sulfide gas with very high purity; and in addition, the crystal sodium sulfide is produced by using the hydrogen sulfide, therefore, no matter the environmental protection and the benefits are optimized.

Description

technical field [0001] The invention relates to a waste gas treatment process and device, in particular to a waste gas treatment process and device containing hydrogen sulfide and carbon dioxide. Background technique [0002] How to make full use of the gas containing hydrogen sulfide and carbon dioxide before treatment is an important problem that the relevant production enterprises need to solve urgently. Since the exhaust gas is composed of CO 2 and H 2 S, both are weakly acidic gases, and many manufacturers only simply treat these two gases, that is, simply oxidize hydrogen sulfide to obtain low-value elemental sulfur, and directly vent carbon dioxide. It not only reduces the use value of hydrogen sulfide, but also increases the emission of carbon dioxide, causing adverse effects on the environment. Contents of the invention [0003] The object of the present invention is to provide a waste gas treatment process and device containing hydrogen sulfide and carbon diox...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14B01D53/18B01D53/78B01D53/62B01D53/52B01D53/96C01F11/18C01B17/22C01B17/40
Inventor 张庆喜王延峰魏传国刘吉祥陈才修
Owner LIAOCHENG LUXI CHEM ENG DESIGN
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