Production method for pressure-swing adsorption concentration of methane in gas

A technology of pressure swing adsorption and production method, which is applied in separation methods, chemical instruments and methods, and separation of dispersed particles, etc. It can solve problems such as application limitations, difficult methane concentration, gas explosion, etc., to improve utilization and utilization rate, expand The effect of application range

Active Publication Date: 2010-06-16
四川省达科特能源科技股份有限公司
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Problems solved by technology

The explosion limit of methane in the air is 5% to 16%, so in the process of concentrating methane from gas, it is difficult to ensure high methane concentration and high yield of the product, and ensure that the methane concentration in the released waste gas is less than 5%, so that the further application of the technology is limited
Chinese patents CN101099606 and CN101096908 propose a method for concentrating methane in low-concentration gas by using pressure swing adsorption technology, but no safety treatment measures ar

Method used

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  • Production method for pressure-swing adsorption concentration of methane in gas
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  • Production method for pressure-swing adsorption concentration of methane in gas

Examples

Experimental program
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Example Embodiment

[0028] Example 1

[0029] Pressure swing adsorption devices such as figure 1 As shown, a VPSA process with two towers in series adsorption and two pressure equalization is adopted. The safety facilities of the PSA device are realized by the following measures:

[0030] 1. The gas compression uses a special screw compressor unit for gas. The main machine of the gas special screw compressor unit adopts a single-stage twin-screw internal water spray cooling structure, and the gas inlet and outlet directions are two-stage compression.

[0031] 2. The adsorption tower is filled with activated carbon adsorbent.

[0032] 3. The adsorption tower and buffer tank are filled with 3% of the adsorbent volume of aluminum alloy mesh explosion suppression material (FC-1).

[0033] 4. The pipeline of the pressure swing adsorption device is filled with aluminum alloy mesh explosion suppression material (FC-1) of 1% of the pipeline volume.

[0034] 5. Special program-controlled valve for gas pipeline is a...

Example Embodiment

[0063] Example 2

[0064] In this embodiment, the methane content of the coal mine gas is 50%, the adsorption pressure is 1.0 MPa, and the adsorption temperature is 40°C. The pressure swing adsorption device adopts the safety facilities of Example 1. The adsorption tower is filled with 3% of the volume of the adsorbent aluminum alloy mesh explosion suppression material (FC-1), and the pipeline is filled with 1% of the volume of the pipeline aluminum alloy mesh explosion suppression material (FC-1). Then follow the process steps of Example 1 to implement.

[0065] In this embodiment, a gas with a methane content of about 95% can be obtained, and a methane yield is about 99%. The downstream gas and displacement gas discharged from outlet 3 are recycled and recycled, and the methane content of gas discharged from outlet 4 is about 0.5v%. The system is safe, CO is not detected, CO 2 The content remains unchanged.

Example Embodiment

[0066] Example 3

[0067] The methane content of the coal mine gas in this embodiment is 10%, the adsorption pressure is 0.3 MPa, and the adsorption temperature is 40° C. The pressure swing adsorption device adopts the safety facilities of Example 1. The adsorption tower is filled with 4% of the volume of the adsorbent aluminum alloy mesh explosion suppression material (FC-1), and the pipeline is filled with 2% of the volume of the pipeline aluminum alloy mesh explosion suppression material (FC-1). Then follow the process steps of Example 1 to implement.

[0068] In this embodiment, a gas with a methane content of 65% can be obtained, and a methane yield is about 95%. The downstream gas and displacement gas discharged from outlet 3 are recycled and recycled, and the methane content of gas discharged from outlet 4 is about 0.5v%. The system is safe, CO is not detected, CO 2 The content remains unchanged.

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Abstract

The invention relates to a method for the concentration of methane in a gas, in particular to a production method for the pressure-swing adsorption concentration of methane in the gas. The technical problem to be solved by the invention is to provide the production method for the pressure-swing adsorption concentration of the methane in the gas. In the method, adsorbents are filled into an adsorbing tower of a pressure-swing adsorption device and a buffer tank; an explosion suppression material the volume of which is 3-4 percent of the volume of the adsorbent is filled into the adsorbing tower of the pressure-swing adsorption device, and an explosion suppression material the volume of which is 1-2 percent of the volume of a pipeline is filled into the pipeline. The method can be used for the concentration of the gas containing 0.5-90 percent of methane, expands the application range of pressure-swing adsorption and improves the utilization quantity and the utilization rate of the gas.

Description

technical field [0001] The invention relates to a method for producing methane in gas, in particular to a method for safely producing methane in gas by pressure swing adsorption concentration. Background technique [0002] my country is a country with large coal resources, with rich gas reserves, ranking third in the world. The gas resources buried within 2,000 meters reach 31.46 trillion cubic meters, of which, those buried within 1,500 meters account for about 60% of the total resources. . At present, my country emits more than 13 billion cubic meters of gas each year due to coal mining, accounting for about 30% of the world's total gas emissions. The development of gas can not only alleviate the contradiction between the tight supply and demand of natural gas, but also improve the safety production conditions of coal mines, increase clean energy, reduce air pollution, and drive the development of related industries. At the same time, it is also one of the important measu...

Claims

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Application Information

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IPC IPC(8): B01D53/047
Inventor 兰治淮李又福余兰金朱代希
Owner 四川省达科特能源科技股份有限公司
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