Coal bed gas deoxidation, nitrogen removal, concentration method based on product gas methane replacement and device thereof

A coalbed methane and gas methane technology, applied in the field of coalbed methane deoxygenation and nitrogen removal, can solve the problems of methane enrichment effect and oxygen concentration reduction, so as to reduce methane and oxygen concentration, increase methane concentration and ensure safety Effect

Inactive Publication Date: 2018-12-18
ZHENGZHOU FULONG NEW MATERIAL TECH
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Problems solved by technology

However, it does not mention the enrichment effect of this method on methane and the possibility of further reducing the concentration of oxygen

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  • Coal bed gas deoxidation, nitrogen removal, concentration method based on product gas methane replacement and device thereof
  • Coal bed gas deoxidation, nitrogen removal, concentration method based on product gas methane replacement and device thereof
  • Coal bed gas deoxidation, nitrogen removal, concentration method based on product gas methane replacement and device thereof

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Embodiment Construction

[0036] Specific embodiments of the present invention will be described in detail below in conjunction with specific drawings. It should be noted that the technical features or combinations of technical features described in the following embodiments should not be regarded as isolated, and they can be combined with each other to achieve better technical effects. In the drawings of the following embodiments, the same reference numerals appearing in each drawing represent the same features or components, which can be used in different embodiments.

[0037] A coalbed methane deoxygenation and denitrogenation enrichment method based on product gas methane replacement, including the following two-stage process:

[0038] The first stage: remove the oxygen in the coalbed methane;

[0039] The second stage: remove the nitrogen in the coalbed methane;

[0040] The concentration of oxygen in the product gas enriched by the above concentration and separation method is below 0.3%; the co...

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Abstract

The invention relates to the technical field of a pressure swing adsorption gas separation technology, and especially relates to a coal bed gas deoxidation, nitrogen removal, concentration method based on product gas methane replacement and a device thereof. The method comprises the following two-stage process: a first stage is a deoxidation process, and a second stage is a denitrification process; the oxygen concentration in a final product gas obtained by the above concentration method is below 0.3%, and the concentration of methane is above 90%, so that a purpose of purifying coal bed gas can be achieved. The method realizes the purpose of purifying low-concentration coal bed gas to obtain high-concentration methane; a separation process uses methane replacement to replace part of the nitrogen in an adsorption tower, and the methane concentration is increased; the nitrogen produced by a second-stage separation process is used as the purge gas for regeneration of the first-stage adsorption tower, the concentration of methane and oxygen at a first-stage regeneration outlet can be reduced, the danger of the regeneration gas entering the explosion limit can be eliminated, and the safety of the adsorption process can be ensured.

Description

technical field [0001] The invention relates to the technical field of pressure swing adsorption gas separation, in particular to a coalbed gas deoxygenation and nitrogen removal concentration method and device based on product gas methane replacement. Background technique [0002] Coalbed methane is a high-quality energy source with high calorific value and no pollution. my country is rich in coalbed methane resources, but low-concentration coalbed methane accounts for a relatively high proportion. my country emits more than 1.2 billion cubic meters of low-concentration coalbed methane every year due to coal mining and other activities. At present, the utilization rate of this part of gas in our country only accounts for 5% to 7% of the total emissions, and most of them are discharged into the atmosphere, which not only wastes resources, but also causes air pollution. [0003] An important factor restricting the utilization of low-concentration coalbed methane is that the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/047C10L3/10
CPCB01D53/047B01D2253/102B01D2253/108B01D2253/204C10L3/101C10L3/105Y02C20/20
Inventor 孙星星丁艳宾郝小非张银年胡宏杰
Owner ZHENGZHOU FULONG NEW MATERIAL TECH
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