Method for deoxidizing coal bed gas and separating methane by concentration

A technology of coalbed methane and methane, applied in the direction of gas fuel, petroleum industry, fuel, etc., can solve the problems of incomplete separation, poor enrichment effect, and many components after one concentration

Active Publication Date: 2010-12-22
CCTEG CHINA COAL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the process of separation, concentration and deoxygenation of coalbed methane by pressure swing adsorption has many components, and the one-time concentration cannot be completely separated and CH 4 The effect of enrichment is not good, so it is impossible to realize the promotion and application of industrialization. At the same time, it is also a major difficulty that a suitable adsorbent can separate multi-component gases at the same time. Many scholars are working on this aspect.

Method used

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  • Method for deoxidizing coal bed gas and separating methane by concentration
  • Method for deoxidizing coal bed gas and separating methane by concentration
  • Method for deoxidizing coal bed gas and separating methane by concentration

Examples

Experimental program
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Effect test

Embodiment 1

[0054] 1) Deoxidation of coalbed methane with fixed bed coalbed methane non-catalytic deoxidation device:

[0055] turn on figure 1 The shown fixed bed coal bed methane non-catalytic deoxidation device (the inner diameter of the furnace body 1 of the fixed bed reactor of the device is 2m, and the height is 3.5m) after the circulating gas pressure regulating valve 7, anthracite with a particle size of 25-50mm is used) As the deoxygenated fuel, the deoxygenated fuel is added into the furnace body 1 of the fixed bed reactor through the coal box 4, and the charging amount is 140kg / h, and the flow rate is 1130Nm 3 Coal bed methane (raw material gas) at / h (air velocity is 0.1m / s) passes through the flame arrester 15 on the coal bed gas inlet pipe 16, the pressure sensor 14, the overpressure cut-off valve 13, the intake pressure regulating valve 12, and the check valve 11 and flow meter B 24, enter the furnace body 1 of the fixed-bed reactor through the grate 21, and carry out deox...

Embodiment 2

[0069] 1) Deoxidation of coalbed methane with fixed bed coalbed methane non-catalytic deoxidation device:

[0070] closure figure 1Coke with a particle size of 25-50mm is used as the fuel for deoxygenation after the circulating gas pressure regulating valve 7 of the fixed-bed coalbed methane non-catalytic deoxidation device (the inner diameter of the furnace body 1 of the fixed-bed reactor of the device is 2m and the height is 3.5m). , the deoxygenated fuel is added into the furnace body 1 of the fixed-bed reactor through the coal box 4, and the charging amount is 110kg / h, and the flow rate is 1130Nm 3 Coal bed methane (raw material gas) at / h (air velocity is 0.1m / s) passes through the flame arrester 15 on the coal bed gas inlet pipe 16, the pressure sensor 14, the overpressure cut-off valve 13, the intake pressure regulating valve 12, and the check valve 11 and flow meter B 24, enter the furnace body 1 of the fixed-bed reactor by the grate 21, and carry out deoxidation reac...

Embodiment 3

[0083] 1) Deoxidation of coalbed methane with fixed bed coalbed methane non-catalytic deoxidation device:

[0084] closure figure 1 After the circulating gas pressure regulating valve 7 of the fixed-bed non-catalytic deoxidation device for coalbed methane (the inner diameter of the fixed-bed reactor (1) of the device is 2m and the height is 3.5m), semi-coke with a particle size of 25-50mm is used as the deoxygenation fuel , the deoxygenated fuel is added into the furnace body 1 of the fixed-bed reactor through the coal box 4, and the charging amount is 130kg / h, and the flow rate is 1130Nm 3 Coal bed methane (raw material gas) at / h (air velocity is 0.1m / s) passes through the flame arrester 15 on the coal bed gas inlet pipe 16, the pressure sensor 14, the overpressure cut-off valve 13, the intake pressure regulating valve 12, and the check valve 11 and flow meter B 24, enter the furnace body 1 of the fixed-bed reactor by the grate 21, and carry out deoxidation reaction with th...

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Abstract

The invention discloses a method for deoxidizing coal bed gas and separating methane by concentration. By using the method, the coal bed gas having 20 to 50 percent of CH4 can be deoxidized, and the requirement on the oxygen content in raw material gas is low, so that the raw material gas can be deoxidized when the oxygen content is 10.6 to 15 percent, and the times of circulated deoxidization can be obviously reduced compared with that of the conventional method. Therefore, energy consumption and production cost can be lowered, deoxidization time can be shortened, and production efficiency can be further improved. The method is characterized by wide application range, low investment consumption, complete and fast deoxidization, and good application prospect in the field of coal bed gas deoxidization. The concentration of the methane in the coal bed gas can be improved from 20 to 50 percent in the raw material gas to 80 to 90 percent by the method. CH4 concentration, decarbonization and denitrification can be performed by the method with only one carbon molecular sieve, so that the concentration separation efficiency is obviously improved, and the method has great significance andapplication value in the aspect of industrialized popularization of the coal bed gas.

Description

technical field [0001] The invention belongs to the field of coal bed gas, in particular to a method for coal bed gas deoxidation, concentration and separation of methane. Background technique [0002] Coalbed methane, commonly known as coal mine gas, is mainly composed of methane (CH 4 ), and also contains a certain amount of carbon dioxide, nitrogen and oxygen, which is an unconventional natural gas. It is a gas resource associated and symbiotic with coal. [0003] Because coalbed methane contains oxygen, in addition to being directly used as fuel or power generation, oxygen must be removed for pressurized transportation or concentration, so as to ensure the safe operation of subsequent processes. Currently available coalbed methane deoxidation methods mainly include catalytic deoxidation method (CN02113627.0) and coke combustion method. Compared with the two, the catalytic deoxygenation method requires the use of a catalyst, and the cost of deoxidation is relatively hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L3/10
Inventor 董卫果李雪飞王鹏徐春霞杨宗仁文芳张科达李小亮国晖刘春兰段超吴涛
Owner CCTEG CHINA COAL RES INST
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