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Removal and recycling method of hydrogen sulfide in nature gas

A processing method and technology of hydrogen sulfide, which is applied in gas fuel, petroleum industry, fuel and other directions, can solve the problems of equipment corrosion, loss of alcohol amine solvent, large area of ​​absorption tower and desorption tower, etc. Save land and realize the effect of resource utilization

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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  • Removal and recycling method of hydrogen sulfide in nature gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] The volume content of hydrogen sulfide in a certain natural gas is 10%.

[0064] 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 unit membrane module with a pore size of 0.2 μm,

[0065] Cold water at a temperature of 5°C is used as the absorbing liquid, so that the natural gas containing hydrogen sulfide in the tube side and the shell side of the polypropylene hollow fiber hydrophobic membrane unit membrane module flows in reverse, and the hydrogen sulfide in the natural gas permeates through the membrane and enters the absorption In the liquid, the flow rate of cold water in the tube is 0.5m / s,

[0066] The sulfur-containing effluent from the tube side of the hydrophobic membrane unit is heated to 45°C by a pipeline heater after being heat-exchanged by a heat exchanger, and then pumped into a negative-pressure desulfuriza...

Embodiment 2

[0073] The volume content of hydrogen sulfide in a certain natural gas is 12%.

[0074] 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 unit membrane module with a pore size of 0.15 μm,

[0075] Cold water at a temperature of 15°C is used as the absorbing liquid, so that it flows countercurrently with the natural gas containing hydrogen sulfide in the tube side of the polypropylene hollow fiber hydrophobic membrane unit membrane module, and the hydrogen sulfide in the natural gas permeates through the membrane and enters the absorbing liquid. The flow rate of cold water in the tube is 1.0m / s,

[0076] The sulfur-containing effluent from the tube side of the hydrophobic membrane unit is heated to 40°C by a pipeline heater after being heat-exchanged by a heat exchanger, and then pumped into a negative-pressure desulfurization unit t...

Embodiment 3

[0083] The volume content of hydrogen sulfide in a certain natural gas is 15%.

[0084] The treatment steps are as follows: under the pressure of 0.4MPa, the natural gas containing hydrogen sulfide is pressed into the shell side of the polypropylene hollow fiber hydrophobic membrane unit membrane module with a pore size of 0.1 μm,

[0085] Cold water at a temperature of 8°C is used as the absorbing liquid, so that it flows in the reverse direction of the natural gas containing hydrogen sulfide in the tube side of the polypropylene hollow fiber hydrophobic membrane unit membrane module, and the hydrogen sulfide in the natural gas permeates through the membrane and enters the absorbing liquid. The flow rate of cold water in the tube is 0.8m / s,

[0086] The sulfur-containing effluent from the tube side of the hydrophobic membrane unit is heated to 35°C by a pipeline heater after being heat-exchanged by a heat exchanger, and then pumped into a negative-pressure desulfurization uni...

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Abstract

The invention relates to a removal and recycling method of hydrogen sulfide in nature gas, including the following steps of: first, under a certain pressure, pressing natural gas containing hydrogen sulfide into a shell side of a hollow fiber hydrophobic membrane unit, with cold water as an absorption liquid, allowing cold water to flow in a tube pass of the hollow fiber hydrophobic membrane unit in a direction reverse to that of the natural gas containing hydrogen sulfide, allowing hydrogen sulfide in natural gas to penetrate the membrane and enter into the water, so as to form water containing hydrogen sulfide; secondly, pumping the water containing hydrogen sulfide into a negative pressure desulfurization unit to be subjected to negative pressure desulfurization to produce hydrogen sulfide and a desulfurization effluent; and finally, pumping the hydrogen sulfide produced in the negative pressure desulfurization unit into an absorption tower for alkali solution absorption, wherein the alkali solution is a sodium hydroxide solution, and carrying out a reaction to generate a liquid sodium hydrosulfide product, so as to realize the removal and recycling of hydrogen sulfide in natural gas. The method has the advantages of simple technical equipment, easiness in operation and maintenance, strong adaptability to environment, high desulfurization efficiency, capability of achieving modular processing and low operation cost.

Description

technical field [0001] The invention relates to the field of natural gas purification, in particular to a method for removing and recycling hydrogen sulfide in natural gas. In particular, it refers to the treatment method that uses hydrophobic membrane separation technology + negative pressure desulfurization technology + alkali liquid absorption technology to remove hydrogen sulfide in natural gas and make it a resource. 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. Nat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L3/10
CPCC10L3/103C10L2230/22C10L2230/00C10L2290/541C10L2290/542C10L2290/548
Inventor 张新妙栾金义彭海珠侯秀华
Owner CHINA PETROLEUM & CHEM CORP