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Liquefied gas desulphurization alcoholic lye regeneration tail gas deodorizing method

An alcohol-lye and liquefied gas technology, which is applied in chemical instruments and methods, separation methods, and dispersed particle separation to achieve the effect of reducing operating costs and prolonging service life.

Inactive Publication Date: 2018-07-10
NORTH HUAJIN CHEM IND CO LTD
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0006] The invention proposes a method for deodorizing tail gas from liquefied gas demercaptan alkali liquor regeneration, in order to solve the technical problem of how to reduce the deodorization cost of alkali liquor regeneration tail gas and improve the quality of deodorization

Method used

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  • Liquefied gas desulphurization alcoholic lye regeneration tail gas deodorizing method

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Embodiment Construction

[0016] In order to make the purpose, content and advantages of the present invention clearer, the specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0017] This embodiment proposes a method for deodorizing tail gas from regeneration of liquefied gas sweetening alkali liquor, and the deodorizing method adopts such as figure 1 Shown technological process, comprises the steps:

[0018] S1. The tail gas regenerated from liquefied gas demercaptan alkali solution enters the bottom of the water washing tower T-402, and countercurrently contacts with the desalted water entering from the top to wash off the residual alkali solution in the tail gas. Two water washing circulation pumps P-401A are installed at the bottom of the water washing tower / B, carry out circulating water washing on the tail gas, regularly supplement and replace the desalted water according to the analys...

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Abstract

The invention belongs to the technical field of chemical industry tail gas treatment, and concretely relates to a liquefied gas desulphurization alcoholic lye regeneration tail gas deodorizing method.The method comprises the following steps: washing liquefied gas desulphurization alcoholic lye regeneration tail gas with water to remove an alkali lye residual in the regeneration tail gas; washingthe water-washed regeneration tail gas with diesel oil to absorb sulfides in the regeneration tail gas; and performing adsorption deodorizing treatment on the diesel-washed regeneration tail gas to further remove sulfides in the regeneration tail gas. The tail gas is sequentially washed with water and diesel before undergoing adsorption deodorizing, so the service life of an adsorption deodorizingdevice is prolonged, the operating cost is reduced, and requirements of all environmental protection indexes are met.

Description

technical field [0001] The invention belongs to the technical field of chemical tail gas treatment, and in particular relates to a method for deodorizing tail gas regenerated with liquefied gas sweetening alkali liquor. Background technique [0002] With the in-depth advancement of my country's industrialization and urbanization, the consumption of energy resources continues to increase, and the pressure on air pollution prevention and control continues to increase. More and more countries are enacting stricter legal provisions to restrict air pollution. my country has successively revised the "Air Pollution Prevention and Control Law" and "Environmental Protection Law", and issued the "Petroleum Refining Enterprise Pollutant Discharge Standard" (GB31570-2015) specifically for petroleum refining enterprises. [0003] In order to meet the corresponding environmental protection requirements, the lye containing sodium mercaptide and sodium sulfide needs to be regenerated. At p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/18B01D53/02
CPCB01D53/02B01D53/1406B01D53/1493B01D53/18B01D2252/103B01D2252/205
Inventor 孙伟黄武生金晓晨王建伟罗军郭立陆兰超贾凌岩王晓辉周严
Owner NORTH HUAJIN CHEM IND CO LTD
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