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Method for removing acidic components and water from gas in one step

A technology for acid components and gases, applied in the field of one-step removal of acid components and water, can solve problems such as the combination of deacidification and dehydration processes, and achieve the effects of increasing surface area, reducing purification costs, and avoiding degradation and deterioration.

Active Publication Date: 2017-02-22
BEIJING SIJIANTONG TECH&DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to overcome the defect that the deacidification and dehydration processes cannot be combined into one process by adopting the existing method, and provide a new method for removing acid components and water in one step from gas

Method used

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  • Method for removing acidic components and water from gas in one step
  • Method for removing acidic components and water from gas in one step

Examples

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Effect test

specific Embodiment approach

[0046] According to a specific embodiment of the present invention, the method for removing acid components and water in one step from gas is figure 1Or in the one-step deacidification and dehydration system shown in 2, the one-step deacidification and dehydration system includes an absorption device and a regeneration device, wherein the regeneration device includes a heater 8 and a supergravity regenerator 10. The gas to be treated containing acidic components and water is contacted with an absorbent in the supergravity absorber 1 to remove the acidic components and water in the gas to be treated to obtain purified gas from which the acidic components and water have been removed And the rich absorbent that has absorbed acidic components and water, the purified gas is discharged from the gas outlet at the top of the supergravity absorber 1, and part of the absorbent entrained in the gas is recovered through the first recycler 3 or not, and the The rich absorbent is then decom...

Embodiment 1

[0051] This example is used to illustrate the one-step method for removing acidic components and water provided by the present invention.

[0052] Main components of the gas to be treated: water content 5g / m 3 , CO 2 Content 1.5% (v / v), H 2 S content 1% (v / v), the rest is methane;

[0053] Supergravity absorber: manufactured by Hangzhou Keli Chemical Equipment Co., Ltd., model BZ750-3P;

[0054] Supergravity regenerator: manufactured by Hangzhou Keli Chemical Equipment Co., Ltd., model BZ750-3P;

[0055] Absorption test: gas to be treated at 500Nm 3 The flow rate of / h is introduced into the high gravity absorber from the gas inlet of the high gravity absorber, and the absorbent (obtained after uniformly mixing 20 parts by weight of TEG and 80 parts by weight of MDEA) is fed from the supergravity absorber at a flow rate of 100kg / h The liquid inlet of the gravity absorber is introduced into the supergravity absorber, the rotation speed is 1000r / min, the absorption pressure...

Embodiment 2

[0060] This example is used to illustrate the one-step method for removing acidic components and water provided by the present invention.

[0061] The absorption test of this embodiment is the same as that of Example 1, except that the desorption test is carried out at 160° C., and other conditions remain unchanged. Analysis of the water content in the lean absorbent was 0.1% by weight, the hydrogen sulfide content was 0.2% by weight, and no carbon dioxide was detected.

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Abstract

The invention relates to the field of deacidification and dehydration and provides a method for removing acidic components and water from gas in one step. The method includes the steps that to-be-treated gas containing the acidic components and the water makes contact with an absorbent for deacidification and dehydration so as to obtain gas without the acidic components and the water and a rich absorbent absorbing the acidic components and the water, then the rich absorbent is subjected to regeneration, and a poor absorbent obtained after regeneration circulates and is used in the deacidification and dehydration process, wherein the absorbent is an amino compound or a mixture of an amino compound and an alcohol compound. The regeneration process includes the step that the rich absorbent is sequentially subjected to heating and supergravity desorption and regeneration to obtain the poor absorbent serving as liquid-phase effluent and the gas containing the acidic components and the water and serving as gas-phase effluent. The aim of deacidification and dehydration in one step in the same procedure can be achieved, and efficient regeneration of the rich absorbent at low temperature is achieved.

Description

technical field [0001] The present invention relates to a method for removing acid components and water from gas in one step. Background technique [0002] In the fields of energy, petrochemical and environmental protection, some gases (such as natural gas, shale gas, synthesis gas, coal gas, dry gas, etc.) usually contain a certain amount of acidic components (such as H 2 S, CO 2 , SO 2 etc.) and water, in order to meet the requirements of environmental protection and use, it is necessary to remove the acidic components and water in these gases to a certain extent before they can meet the requirements of subsequent use or deep processing. [0003] At present, the acidic components and water in the gas are removed in two steps, and the water is usually removed after the acidic components are removed. The basic work flow for removing acidic components and water is similar, which includes absorbing acidic components or water with absorbent in the absorption tower, and then ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14
Inventor 李云龙童扬传朱纯峰周跃王媛
Owner BEIJING SIJIANTONG TECH&DEV
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