Removal and resourceful treatment method for hydrogen sulfide in natural gas

A treatment method and technology for hydrogen sulfide, which are applied in gas fuel, petroleum industry, fuel and other directions, can solve the problems of large area of ​​absorption tower and desorption tower, loss of alcohol amine solvent, equipment corrosion, etc., to achieve resource utilization, reduce The effect of occupying area and saving land

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 ex...

Method used

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  • Removal and resourceful treatment method for hydrogen sulfide in natural gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] The volume content of hydrogen sulfide in a certain natural gas is 10%.

[0062] The treatment steps are as follows: under the pressure of 0.1MPa, press natural gas containing hydrogen sulfide into the shell side of a section of polypropylene hollow fiber hydrophobic membrane module with a pore size of 0.2μm, and use cold water at a temperature of 5°C as the absorbing liquid to make it in the hollow The tube side of the fiber hydrophobic membrane module is the reverse flow of the hollow fiber membrane hole and the natural gas containing hydrogen sulfide. The hydrogen sulfide in the natural gas enters the water absorption liquid through the membrane. The flow rate of the cold water in the tube side is 0.5m / s. After the sulfur-containing effluent of the hydrophobic membrane is heat-exchanged by the heat exchanger, it is heated to 45°C by a pipeline heater, and then flows into the membrane pores of the two-stage polypropylene hollow fiber hydrophobic membrane with a pore si...

Embodiment 2

[0067] The volume content of hydrogen sulfide in a certain natural gas is 12%.

[0068] The treatment steps are as follows: under the pressure of 0.2MPa, press natural gas containing hydrogen sulfide into the shell side of a section of polypropylene hollow fiber hydrophobic membrane module with a pore size of 0.15μm, and use cold water at a temperature of 15°C as the absorbing liquid to make it in the hollow The tube side of the fiber hydrophobic membrane module is the reverse flow of the hollow fiber membrane hole and the natural gas containing hydrogen sulfide. The hydrogen sulfide in the natural gas enters the water absorption liquid through the membrane. The cold water flow rate in the tube side is 1.0m / s. After the sulfur-containing effluent of the hydrophobic membrane is heat-exchanged by the heat exchanger, it is heated to 43°C by a pipeline heater, and then flows into the membrane pores of the two-stage polypropylene hollow fiber hydrophobic membrane with a pore size of...

Embodiment 3

[0073] The volume content of hydrogen sulfide in a certain natural gas is 15%.

[0074] The treatment steps are as follows: under the pressure of 0.3 MPa, the natural gas containing hydrogen sulfide is pressed into the shell side of a section of polypropylene hollow fiber hydrophobic membrane module with a pore size of 0.1 μm, and cold water at a temperature of 10 ° C is used as the absorption liquid to make it in the hollow The tube side of the fiber hydrophobic membrane module is the reverse flow of the hollow fiber membrane hole and the natural gas containing hydrogen sulfide. The hydrogen sulfide in the natural gas passes through the membrane and enters the water absorption liquid. The cold water flow rate in the tube side is 0.7m / s. The sulfur-containing effluent from the hydrophobic membrane is heated to 40°C by a pipeline heater after being heat-exchanged by a heat exchanger, and then flows into the membrane pores of the two-stage polypropylene hollow fiber hydrophobic m...

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Abstract

The invention relates to a removal and resourceful treatment method for hydrogen sulfide in natural gas. The removal and resourceful treatment method comprises the following steps that firstly, water serves as absorption liquid, the hydrogen sulfide in the natural gas is absorbed into the water on the other side of a hydrophobe film through a first section of the hydrophobe film, and sulfur-containing outlet water is formed; and secondly, a second section of the hydrophobe film is adopted, negative pressure is pumped through the film permeation side, the hydrogen sulfide in the sulfur-containing outlet water is pumped out and collected through the second section of the hydrophobe film to the film permeation side, then the hydrogen sulfide enters an absorption tower for alkali liquor absorption, and a sodium bisulfide product is formed. Through the removal and resourceful treatment method for the hydrogen sulfide in the natural gas, the problems of solvent loss, foaming and degradation caused by alcohol amine absorption adopted in a natural gas chemical absorption method desulfurization process and equipment corrosion caused by solvent degradation are solved, meanwhile, recycling of the hydrogen sulfide is achieved, the occupied space of equipment is reduced, land is saved, and skid-mounted and modularized treatment can be achieved for areas with limited places.

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 membrane separation 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. Natural gas purification processes generally include natural g...

Claims

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Application Information

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IPC IPC(8): C10L3/10
Inventor 张新妙栾金义郭智彭海珠
Owner CHINA PETROLEUM & CHEM CORP
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