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Method and device for removing hydrogen sulphide from mixture gas containing low-concentration hydrogen sulphide

A technology of mixing gas and hydrogen sulfide, which is applied in chemical instruments and methods, separation methods, and dispersed particle separation, etc., can solve the problems of small gas processing capacity, difficulty in absorbing liquid regeneration, and low hydrogen sulfide removal rate.

Active Publication Date: 2007-10-31
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. Small gas treatment capacity and low hydrogen sulfide removal rate;
[0005] 2. It is difficult to regenerate the absorption liquid;
[0006] 3. Large area;
[0007] 4. Serious waste of absorption liquid;
[0008] 5. Higher cost

Method used

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  • Method and device for removing hydrogen sulphide from mixture gas containing low-concentration hydrogen sulphide

Examples

Experimental program
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Embodiment

[0049] In a 2.5 million tons / year delayed coking unit cold coke water closed circulation system, according to the method of the present invention, an absorption tower is set to absorb the hydrogen sulfide gas in the mixed gas discharged from the cold coke hot water tank, and then remove the mixed gas The stench in it, its specific operation process and effect are described as follows:

[0050] 1. The nature of the gas mixture

[0051] The exhaust volume of coking hot water tank V=600m 3 / h, the outlet pipe of the coking hot water tank is DN 400mm; the mixed gas is composed of air, water vapor, and a small amount of hydrogen sulfide gas, of which the content of hydrogen sulfide is not more than 100ppm, and the temperature is 80-90°C.

[0052] 2. The nature of the absorption liquid

[0053] The absorption solution used is 30% N-methylethylene glycol amine solution (MDEA), and 10% triethanolamine (TEA) is added as an additive.

[0054] 3. Device (absorption tower)

[0055] Th...

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Abstract

The invention provides a H2s removing method from the gas mixture, comprising a provision of absorption of liquid, with the solution selected from N-methyl diethanolamine, aminoethanol and their mixture, under 0. 05-0. 30MPa absolute pressure, keeping the 18-42deg.C absorption liquid contact with the 20-52deg.C low density H2S gas, absorbing mixture gas through countercurrent and vortex, lowering the mixture gas H2S into 10ppm or even lower, separating the mixture gas for swirl gas and liquid separation. It also provides a low density H2S gas mixture to remove it.

Description

technical field [0001] The present invention relates to a method for absorbing low-concentration hydrogen sulfide gas, in particular to a method for removing hydrogen sulfide from a mixed gas containing low-concentration hydrogen sulfide gas. The present invention also relates to a device for removing hydrogen sulfide from a mixed gas containing low-concentration hydrogen sulfide gas. Background technique [0002] Hydrogen sulfide is a highly irritating gas with a strong smell of rotten eggs. It is very toxic to the human body, and it is flammable and explosive. It is easy to corrode metals, cause catalyst poisoning, and block pipelines. Even a small amount of hydrogen sulfide in factory exhaust and natural gas will cause great pollution to the environment. Coal chemical industry, rubber regeneration, sewage sludge, and municipal waste treatment and other industrial processes will produce a lot of low-concentration hydrogen sulfide odor gas, which not only seriously affects...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/52B01D53/78B01D53/18
Inventor 杨强汪华林周萍李权炳
Owner EAST CHINA UNIV OF SCI & TECH
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