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A coalbed methane enrichment process

A coalbed methane and process technology, which is applied in the field of coalbed methane enrichment process, can solve the problems of complex process, high operating cost, and large investment in basic equipment, and achieve the effect of simple process line, less engineering loss and convenient operation

Inactive Publication Date: 2016-08-17
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] Among the five processes mentioned above, some of them have large investment in basic equipment and high operating costs, and some of them are immature, complicated in process and high in energy consumption.

Method used

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  • A coalbed methane enrichment process
  • A coalbed methane enrichment process
  • A coalbed methane enrichment process

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Embodiment Construction

[0035] In order to make the objects and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0036] The idea of ​​the whole process provided by the present invention is: use ether solvent to adsorb methane in coalbed methane, then desorb the solvent-rich liquid after adsorbing methane to separate methane, collect methane-enriched gas, and desorb methane-enriched gas Ether treatment, the system methane products.

[0037] When it is in operation: first pressurize and cool the ether solvent to 1.3MPa and -25°C, pressurize the coal bed gas to 1.3 MPa, and put the pressurized and cooled ether solvent and pressurized coal bed gas in countercurrent contact adsorption in the absorption tower T101 Methane in the coalbed methane, and then the so...

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Abstract

The invention discloses a coal bed gas enrichment process comprising the steps of: adsorbing methane in a coal bed gas with an ethyl ether solvent; then desorbing a solvent rich solution which adsorbs methane to separate methane; collecting to obtain a methane-rich gas; removing ethyl ether from the methane-rich gas to prepare a methane product. The coal bed gas enrichment process is simple in route, convenient to operate and small in investment.

Description

technical field [0001] The invention relates to the field of coal bed gas treatment in coal mines, and specifically designs a coal bed gas enrichment process. Background technique [0002] Coalbed methane, commonly known as gas, is a hydrocarbon gas that exists in coal seams, and its main component is CH 4 . Coalbed methane has high comprehensive utilization value. In addition to civil use, it can also be used as power fuel for gas turbine power generation, heat supply, compression and liquefaction, and chemical products such as methanol and synthetic ammonia. It is also the basis of organic chemical products such as pesticides, medicines, and dyes. raw material. Table 1 is a table of the extraction volume, utilization and discharge of coalbed methane in my country from 2007 to 2011. [0003] Table 1 2007 ~ 2011 my country's coalbed methane extraction, utilization, emission table [0004] [0005] At present, the main reason for a large amount of coalbed methane venti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C9/04C07C7/00C07C7/12C10L3/10
Inventor 杨志远宣自润王德超王思同曹水静张小宁
Owner XIAN UNIV OF SCI & TECH