Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

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
View PDF3 Cites 23 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 are proposed, and the result will be subject to application restrictions like patent CN85103557
[0009] As mentioned above, in the process of concentrating methane in gas by pressure swing adsorption, in order to obtain methane with a concentration greater than 90%, no matter how small the concentration of methane in gas is, the concentration of methane and oxygen in the adsorption tower and pipeline may reach The conditions for a gas explosion, as long as there is a fire source at the same time, a gas explosion accident will occur

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Production method for pressure-swing adsorption concentration of methane in gas
  • Production method for pressure-swing adsorption concentration of methane in gas
  • Production method for pressure-swing adsorption concentration of methane in gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0030] 1. Gas compression uses a screw compressor unit dedicated to gas gas. The main engine in the screw compressor unit dedicated to gas gas adopts a single-stage twin-screw internal water spray cooling structure, and the direction of gas inlet and outlet is two-stage compression.

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

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

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

[0034] 5. Adopt special p...

Embodiment 2

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

[0065] In this embodiment, gas with a methane content of about 95% can be obtained, and the methane yield is about 99%. The bleed gas and replacement gas discharged from the outlet 3 are recycled, and the methane content of the gas discharged from the outlet 4 is about 0.5v%. System safe, no CO detected, CO 2 Content unchanged.

Embodiment 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 the first embodiment. The adsorption tower is filled with 4% aluminum alloy mesh explosion suppression material (FC-1) of adsorbent volume, and the pipeline is filled with aluminum alloy mesh explosion suppression material (FC-1) with 2% pipeline volume. Then implement according to the processing steps of embodiment 1.

[0068] In this embodiment, gas with a methane content of 65% can be obtained, and the methane yield is about 95%. The bleed gas and replacement gas discharged from the outlet 3 are recycled, and the methane content of the gas discharged from the outlet 4 is about 0.5v%. System safe, no CO detected, CO 2 Content unchanged.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com