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Method, device and reactor for recovery of sulfur from acidic gas

A technology for acid gas and sulfur recovery, applied in separation methods, sulfur preparation/purification, chemical instruments and methods, etc., can solve problems such as high toxicity, achieve reliable reaction temperature, simple and reasonable structure, and save equipment space. Effect

Inactive Publication Date: 2014-11-12
杭州林达化工技术工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The tail gas after sulfur recovery by selective catalytic oxidation is used. The current method is to increase the number of stages of sulfur recovery by oxidation, from the first level to the second level and the third level, and increase the sulfur recovery rate, but it is still difficult to exceed 99.5%.
Because H 2 S is highly toxic, my country's environmental protection requirement is 2 , the sulfur recovery rate can only reach slightly higher than 99%

Method used

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  • Method, device and reactor for recovery of sulfur from acidic gas
  • Method, device and reactor for recovery of sulfur from acidic gas
  • Method, device and reactor for recovery of sulfur from acidic gas

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Effect test

Embodiment 1

[0066] Use as figure 1 The method of the present invention shown and such as image 3 The device shown performs acid gas desulfurization, and the device includes a first catalytic oxidation reactor R connected in sequence 1 , The first water cooler E 5 , The first sulfur separator V 1 , The first heat exchanger E 1 , Hydrolysis reactor R 2 , The second catalytic oxidation reactor R 3 , The second water cooler E 6 , The second sulfur separator V 2 , Room temperature alcohol washing tower T 1 And tail gas washing tower T 2 , The normal temperature alcohol scrubber T 1 And tail gas washing tower T 2 Each is equipped with a pump.

[0067] The first catalytic oxidation reactor adopts a water-cooled coiled tube reactor, such as the reactor in the applicant's utility model patent application 201220234489.5.

[0068] The gas to be treated is the acid gas from the coke oven gas low-temperature methanol washing section, and its gas volume and composition are as follows:

[0069]

[0070] Press ...

Embodiment 2

[0072] Realize as figure 1 In the process shown, the three steps of primary catalytic oxidation, hydrolysis, and secondary catalytic oxidation can be carried out in the same reactor, ie Figure 4 In the horizontal reactor shown, the inside of the reactor is divided into three reaction chambers with two vertical partitions: hydrolysis reaction chamber R 2a , The first catalytic oxidation reaction chamber R 1a And the second catalytic oxidation reaction chamber R 3a , Where the hydrolysis reaction chamber R 2a Located in the middle, the first catalytic oxidation reaction chamber R 1a And the second catalytic oxidation reaction chamber R 3a Located in the hydrolysis reaction chamber R 2a On both sides, where the first catalytic oxidation reaction chamber R 1a It is a heat exchange water-cooled heat exchange reaction chamber, with heat exchange tubes distributed in the reaction chamber, and the hydrolysis reaction chamber R 2a And the second catalytic oxidation reaction chamber R 3a It...

Embodiment 3

[0077] Another structural form of the reactor of the present invention, such as Image 6 As shown, the inside of the reactor is divided into two left and right reaction chambers by vertical partitions, where the reaction chamber R 1a It is a catalytic oxidation reaction chamber, and the other reaction chamber is hydrolysis reaction chamber R from bottom to top. 2a And the secondary catalytic oxidation reaction chamber R 3a , One of the catalytic oxidation reaction chamber R 1a Water-cooled heat exchange reaction chamber, hydrolysis reaction chamber R 2a Adiabatic reaction chamber, secondary catalytic oxidation reaction chamber R 3a It is an adiabatic reaction chamber. Hydrolysis reaction chamber R 2a And the secondary catalytic oxidation reaction chamber R 3a There is no partition between them, and two upper and lower reaction chambers are formed by filling different catalyst layers used by each.

[0078] The reactor of the above structure can be used as Figure 7 Device shown:

[0...

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Abstract

The invention discloses a method, device and reactor for recovery of sulfur from acidic gas. An inorganic sulfide in the acidic gas is catalyzed and oxidized into sulfur by catalytic oxidation reaction, then the organic sulfur in the acidic gas is hydrogenated and hydrolyzed into an inorganic sulfide through catalytic hydrolysis reaction, finally the residual inorganic sulfur in the reaction gas is oxidized into sulfur through secondary catalytic oxidation reaction, and the tail gas is washed by a methanol lotion and / or water, thus realizing complete recovery of sulfur. The invention also discloses the device and reactor for realizing the method. The method and device provided by the invention are suitable for sulfur recovery of low H2S content acidic gas. An alcohol-containing solution is utilized for washing treatment of desulfurized tail gas according to the low temperature methanol washing process, the content of sulfide in the tail gas is reduced, and the environment is protected. At the same time, the reactor involved in the invention has a simple and reasonable structure, saves land occupation of equipment, and lowers the project investment.

Description

Technical field [0001] The invention relates to the technical field of sulfur-containing industrial gas processing, in particular to a method, device and reactor for recovering sulfur from acid gas, which is suitable for sulfur recovery in oil refining, coal chemical industry, petrochemical industry, and natural gas processing and production. Background technique [0002] In the existing acid sulfur-containing industrial gas treatment technology, the Claus process (original Claus process) is commonly used, and the reaction is as follows: [0003] H 2 S + 1 2 O 2 = 1 x S x + H 2 O [0004] This process is to control the reaction temperature and can only be carried out at a very low space velocity. It is difficult to use in large-scale industrial plants. Later, an improved Claus process appeared, and the H 2 S oxidation is carried out in two stages, and the reaction is as follows: [0005] H 2 S + 3 2 O 2 = S ...

Claims

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Application Information

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IPC IPC(8): B01D53/86B01D53/75B01D53/52B01D53/40B01D53/48C01B17/04
Inventor 楼韧楼寿林
Owner 杭州林达化工技术工程有限公司
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