Desulfurization liquid for absorbing H2S, desulfurization system and desulfurization method

A desulfurization system and desulfurization liquid technology, applied in separation methods, chemical instruments and methods, dispersed particle separation, etc., can solve problems such as poor desulfurization effect, and achieve the effects of easy sedimentation and separation and large sulfur particles

Active Publication Date: 2020-11-10
BEIJING UNIV OF CHEM TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] One of the technical problems solved by the present invention is that the existing desulfurization liquid is 2 S with high concentrations of CO 2 The desulfurization effect of raw material gas is poor

Method used

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  • Desulfurization liquid for absorbing H2S, desulfurization system and desulfurization method
  • Desulfurization liquid for absorbing H2S, desulfurization system and desulfurization method
  • Desulfurization liquid for absorbing H2S, desulfurization system and desulfurization method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Preparation of iron-based ionic liquid-polyethylene glycol dimethyl ether compound desulfurization solution

[0057] (1) Preparation of iron-based ionic liquid

[0058] Add 759kg of chlorobutane to the autoclave, pump out 641kg of N-methylimidazole, heat to 70°C with steam or water bath, and turn on the mixer for constant temperature reaction for 72h.

[0059] After 72 hours, turn off the heating device, and slowly add ferric chloride to the high-pressure reactor. Since ferric chloride dissolves in the above-mentioned substances, it will generate heat. For safety reasons, ferric chloride can be divided into 20 minutes within 12 hours. For each dosing, a total of 1000kg of ferric chloride needs to be put in, and after all of it is put in, it is cooled to room temperature to obtain 1-butyl-3-methylimidazolium chloride iron-based ionic liquid.

[0060] (2) Compounding of iron-based ionic liquids and additives

[0061] Polyethylene glycol dimethyl ether: After the iron-ba...

Embodiment 2

[0065] Preparation of iron-based ionic liquid-sulfolane compound desulfurization solution:

[0066] After cooling the iron-based ionic liquid prepared in Example 1 to room temperature, continue to add 480-960 kg of sulfolane into the autoclave, and stir for 2 hours to obtain the iron-based ionic liquid-sulfolane compound desulfurization solution.

[0067] Advantages of choosing sulfolane:

[0068] (1) Low viscosity and reduced surface tension make the system less prone to foaming; (2) Compared with iron-based ionic liquid-polyethylene glycol dimethyl ether compound desulfurization liquid, it is easier to absorb hydrogen sulfide under high pressure conditions; (3) The absorption of methane is very small; (4) the sulfolane compound desulfurization liquid absorbs CO 2 Compared with the polyethylene glycol dimethyl ether system, the capacity increased by 20%.

Embodiment 3

[0070] Adopt the desulfurization liquid prepared in embodiment 1 and embodiment 2 to absorb H 2 S desulfurization system, such as figure 1 As shown, the desulfurization system includes a primary desulfurization tower 11, a secondary desulfurization tower 12, a slurry pump 13, a regeneration tower 14, a sulfur separation device 15, and a sulfur melting kettle 16;

[0071] The desulfurization liquid is filled in the primary desulfurization tower 11, the feed gas inlet 111 is provided on the top of the primary desulfurization tower 11, the first pipeline 112 is installed at the lower end of the primary desulfurization tower 11, the primary desulfurization tower 11 and the secondary desulfurization tower 12 are communicated through the first pipeline 112;

[0072] Desulfurization liquid is filled in the secondary desulfurization tower 12, and the top of the secondary desulfurization tower 12 is provided with a purified gas outlet 121, and a second pipeline 122 is installed under ...

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Abstract

The invention discloses a desulfurization liquid for absorbing H2S, and relates to the field of gas purification and the field of pollution control in the chemical process. The desulfurization liquidis mainly prepared from the following components by weight: 200 parts of an iron-based ionic liquid; 1-100 parts of a cosolvent, wherein the cosolvent comprises sulfolane. The invention also providesa desulfurization system for absorbing H2S by adopting the desulfurization liquid and a desulfurization method for absorbing H2S by adopting the desulfurization system. The invention has the beneficial effects that sulfolane is added into the prepared desulfurization liquid, so the desulfurization liquid has the characteristics of being suitable for high pressure and high concentration, and the desulfurization process is not influenced by CO2 impurity gas; the system and method has important application value in treatment of industrial process gas with high system pressure, high sulfur concentration or high CO2 concentration, such as natural gas, acidic water stripping, biomass gas and alcohol amine liquid refined sulfur-containing tail gas.

Description

technical field [0001] The invention relates to the field of gas purification and pollution control in the chemical process, in particular to a hydrogen absorbing 2 S desulfurization liquid, desulfurization system and desulfurization method. Background technique [0002] h 2 S gas will seriously corrode transportation equipment, such as oil tankers, pipelines, gas tank trucks, etc., and the foul-smelling gas it emits will seriously pollute the surrounding environment of pipelines and other transportation equipment. So contains H 2 Before the raw material gas of S is transported, it is very important to desulfurize in situ. [0003] Contains H 2 S feedstock gas includes natural gas, biomass gas, sour water stripping tail gas and Claus hydrogenation tail gas, etc. Natural gas alone includes conventional natural gas, tight gas, coalbed methane, shale gas, and natural gas hydrate. They are not only H 2 The S content is high, and often contains substances such as carbon di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/52B01D53/96
CPCB01D53/78B01D53/52B01D53/96
Inventor 余江李智达施王军钱明超张丽刘雪珂牟朝霞王红雨
Owner BEIJING UNIV OF CHEM TECH
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