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Treatment method for hydrogen sulfide in natural gas

A treatment method, hydrogen sulfide technology, applied in chemical instruments and methods, separation methods, gas fuels, etc., can solve the problems of alcohol amine solvent loss, equipment corrosion, large area occupied by absorption towers and desorption towers, etc., to reduce the occupied area The effects of land area, saving land, and avoiding the loss of alcohol amine solvent

Inactive Publication Date: 2017-04-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the loss of alcohol amine solvent, foaming and degradation, and equipment corrosion caused by solvent degradation are the main problems currently existing in this process
In addition, the absorption tower and desorption tower occupy a large area, especially for stations such as oil and gas fields with limited sites.

Method used

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  • Treatment method for hydrogen sulfide in natural gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The volume content of hydrogen sulfide in a certain natural gas is 2%.

[0042] The treatment steps are as follows: under the pressure of 0.1 MPa, the natural gas containing hydrogen sulfide is pressed into the shell side of the polypropylene hollow fiber hydrophobic membrane module with a pore size of 0.2 μm,

[0043] Sodium hydroxide solution with a mass concentration of 30% is used as the absorbing liquid, so that it circulates in reverse with the natural gas containing hydrogen sulfide in the tube side of the polypropylene hollow fiber hydrophobic membrane module, and the flow rate of the sodium hydroxide solution in the tube side is 0.5 m / s,

[0044] The hydrogen sulfide in the natural gas enters the sodium hydroxide absorption liquid through the membrane, and reacts to form sodium hydrogen sulfide, thereby realizing the removal of hydrogen sulfide in the natural gas.

[0045] The hydrogen sulfide content in the natural gas treated by the above steps is less than ...

Embodiment 2

[0047] The volume content of hydrogen sulfide in a certain natural gas is 5%.

[0048] The treatment steps are as follows: under the pressure of 0.2 MPa, the natural gas containing hydrogen sulfide is pressed into the shell side of the polypropylene hollow fiber hydrophobic membrane module with a pore size of 0.15 μm,

[0049] Sodium hydroxide solution with a mass concentration of 35% is used as the absorbing liquid, so that it circulates in reverse with the natural gas containing hydrogen sulfide in the tube side of the polypropylene hollow fiber hydrophobic membrane module, and the flow rate of the sodium hydroxide solution in the tube side is 0.7 m / s,

[0050] The hydrogen sulfide in the natural gas enters the sodium hydroxide absorption liquid through the membrane, and reacts to form sodium hydrogen sulfide, thereby realizing the removal of hydrogen sulfide in the natural gas.

[0051] The hydrogen sulfide content in the natural gas treated by the above steps is less than...

Embodiment 3

[0053] The volume content of hydrogen sulfide in a certain natural gas is 8%.

[0054]The treatment steps are as follows: under the pressure of 0.2 MPa, the natural gas containing hydrogen sulfide is pressed into the shell side of the polypropylene hollow fiber hydrophobic membrane module with a pore size of 0.15 μm,

[0055] Sodium hydroxide solution with a mass concentration of 40% is used as the absorption liquid, so that it flows in reverse circulation with natural gas containing hydrogen sulfide in the tube side of the polypropylene hollow fiber hydrophobic membrane module, and the flow rate of the sodium hydroxide solution in the tube side is 0.8 m / s,

[0056] The hydrogen sulfide in the natural gas enters the sodium hydroxide absorption liquid through the membrane, and reacts to form sodium hydrogen sulfide, thereby realizing the removal of hydrogen sulfide in the natural gas.

[0057] The hydrogen sulfide content in the natural gas treated by the above steps is less t...

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Abstract

The invention relates to a treatment method for hydrogen sulfide in natural gas. The method includes the steps of: under certain pressure, pressing natural gas containing hydrogen sulfide into a shell side of a hollow fiber hydrophobic membrane component, taking lye as the absorption liquid, letting the lye and the natural gas containing hydrogen sulfide do reverse flow in a pipe side of the hollow fiber hydrophobic membrane component together, making hydrogen sulfide in the natural gas penetrate the membrane and enter the lye, thus realizing removal of hydrogen sulfide in the natural gas. The treatment method for hydrogen sulfide in natural gas provided by the invention adopts lye as the absorption liquid, avoids alcohol amine solvent loss, foaming, degradation and solvent degradation caused equipment corrosion and other problems caused by use of an alcohol amine solution as the absorption solution, at the same time reduces the floor space of equipment, saves land, and can achieve modularized treatment in place limited areas.

Description

technical field [0001] The invention relates to the field of natural gas purification, in particular to a method for treating hydrogen sulfide in natural gas. In particular, it refers to the method of removing hydrogen sulfide in natural gas by using membrane absorption technology. Background technique [0002] With the development of the natural gas industry, high-sulfur gas fields continue to appear, and natural gas contains a large amount of H 2 S gas, due to H 2 When S gas encounters condensed water, it will not only cause overall corrosion of pipes and containers, but also cause sulfide stress corrosion cracking. In addition, CO 2 If the content is too high, the calorific value of natural gas will not meet the requirements. Therefore, all countries have corresponding purification standards for the quality of natural gas. Natural gas purification processes generally include natural gas desulfurization, decarbonization, dehydration and other processes. As far as pip...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L3/10B01D53/78B01D53/52
Inventor 张新妙郭智彭海珠杨永强
Owner CHINA PETROLEUM & CHEM CORP
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