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Equipment and process for liquefying and separating coal bed methane

A liquefaction separation and coal bed gas technology, applied in liquefaction, refrigeration and liquefaction, lighting and heating equipment, etc., can solve the problem of incomplete gas separation, reduce energy consumption, reduce dependence on external cooling capacity, and save energy Effect

Active Publication Date: 2013-03-20
北京惟泰安全设备有限公司
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  • Abstract
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Problems solved by technology

[0010] For this reason, the technical problem to be solved by the present invention is that CO 2 The problem of incomplete gas separation caused by blockage of equipment, and then provide a liquefaction separation equipment with better separation effect and energy saving

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  • Equipment and process for liquefying and separating coal bed methane
  • Equipment and process for liquefying and separating coal bed methane

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Embodiment Construction

[0045] Such as figure 2 As shown, the equipment for the liquefaction and separation of coalbed methane according to the present invention includes sequentially connected:

[0046] Compression purification equipment 1: including dust removal equipment, sulfur removal equipment and water removal equipment, used for pretreatment of the coalbed methane raw material gas. The selected dust removal equipment is a water curtain or a return tank; the sulfur removal equipment is a dry alkaline catalyst filter tank or a wet copper sulfate washing tank; the water removal equipment is an organic silica gel adsorption and desorption tank. so that the coalbed methane only contains O 2 , N 2 、CH 4 and CO 2 Wait for gas.

[0047] A plurality of series-connected cold separators: the cold separator regulates its own temperature control according to the properties of each component gas in the coalbed methane, so that the various component gases in the coalbed methane are cooled and cooled i...

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Abstract

The invention belongs to the field of liquefying and separating on mixed gas, and in particular relates to equipment and a process for liquefying and separating coal bed methane, especially the coal bed gas with low CH4 content. The liquefying and separating process provided by the invention comprises the steps of controlling a cooling temperature in stages and sequentially independently liquefying and separating CO2 and CH4, thus the defect that the equipment is blocked as CO2 is liquefied firstly and even condensed in a CH4 liquefying process can be overcome. Potential safety hazard in a coal bed gas mining process can be solved, and pure CH4 can be collected for other industrial applications.

Description

technical field [0001] The invention belongs to the field of liquefaction and separation of mixed gas, in particular to a kind of coal bed gas, especially low CH 4 Liquefaction and separation equipment and technology of coalbed methane with gas content. Background technique [0002] Coalbed methane, commonly known as "gas", is an unconventional natural gas associated with coal and stored in the coal seam in an adsorbed state. Its calorific value is 2-5 times that of general-purpose coal, and its main component is methane. There are two extraction methods for coalbed methane: one is surface extraction, which has high methane purity (about 98%) and high utilization value. It can be directly pressurized for pipeline network transportation, and can also be directly liquefied for storage and transportation. But much more widely is extraction under mines where coal mining is already in production. The methane content of coalbed methane extracted in this way is relatively low, us...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25J3/02F25J5/00
CPCY02C20/40
Inventor 魏厚瑗丁琦洋
Owner 北京惟泰安全设备有限公司
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