Fixed bed coal seam gas non-catalytic deoxidization method and device

A technology of coalbed methane and fixed bed, which is applied in the direction of gas fuel, petroleum industry, fuel, etc., can solve the problems of difficult reaction temperature, increased methane loss, and long residence time, so as to reduce energy consumption and production cost, and reduce methane cracking , Thorough and rapid deoxygenation effect

A technology of coalbed methane and fixed bed, which is applied in the direction of gas fuel, petroleum industry, fuel, etc., can solve the problems of difficult reaction temperature, increased methane loss, and long residence time, so as to reduce energy consumption and production cost, and reduce methane cracking , Thorough and rapid deoxygenation effect

CN101914402BActive Publication Date: 2013-05-29CCTEG CHINA COAL RES INST
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  • Fixed bed coal seam gas non-catalytic deoxidization method and device

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Effect test

Embodiment 1

[0036] figure 1 The fixed bed coalbed methane non-catalytic deoxidation device shown includes the body of the fixed bed coalbed methane deoxidation device including the furnace body 1, wherein the side wall of the furnace body 1 is provided with a water jacket 2 surrounding the side wall of the furnace body; The top of this water jacket 2 links to each other with the air inlet of steam drum 23 by pipeline, and the steam in water jacket 2 enters steam drum 23 through this pipeline, and the water inlet pipe of the bottom of this water jacket 2 and the water outlet of steam drum 23 Connected, water enters the water jacket 2 from the steam drum 23 through this pipeline.

[0037] In this device, the body of the fixed-bed coalbed methane deoxidation device includes a furnace body 1, a grate 21 located at the bottom of the furnace body 1 and connected to the coalbed gas inlet pipe 16, and a furnace body 1 connected to the top of the fixed-bed reactor through a pipeline. The coal box...

Embodiment 2

[0042] closure figure 1 After the circulating gas pressure regulating valve 7 of the fixed-bed coalbed methane non-catalytic deoxidation device (the internal diameter of the fixed-bed reactor 1 of the device is 3m and the height is 5m), coke with a particle diameter of 25-50mm is used as the deoxygenation fuel, and the deoxidation The fuel is fed into the furnace body 1 of the fixed bed reactor through the coal box 4, the feeding amount is 300kg / h, and the flow rate is 2543Nm 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 the deoxygenated fuel. The deoxidation reaction pressure in the furnace body of the fixed-bed reactor is 5KPa. The te...

Embodiment 3

[0046] closure figure 1After the circulating gas pressure regulating valve 7 of the non-catalytic deoxidation device for fixed bed coalbed methane (the inner diameter of the body of furnace 1 of the fixed bed reactor of the device is 3m and the height is 5m), coke with a particle diameter of 25-50mm is used as the deoxygenation fuel, Add the deoxygenated fuel into the body of furnace 1 of the fixed-bed reactor through the coal box 4, the feed rate is 490kg / h, and the flow rate is 5087Nm 3 Coalbed methane (raw material gas) at / h (air velocity is 0.2m / s) passes through the flame arrester 15 on the coalbed 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 flowmeter second 24, enter in the furnace body 1 of fixed-bed reactor by grate (21), carry out deoxidation reaction with deoxygenation fuel, the deoxidation reaction pressure in the furnace body of fixed-bed reactor is 6KPa, control ...

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Abstract

The invention discloses a fixed bed coal seam gas non-catalytic deoxidization method and a fixed bed coal seam gas non-catalytic deoxidization device. The device comprises a fixed bed coal seam gas deoxidization device body including a furnace body (1), wherein the side wall of the furnace body (1) is provided with a water jacket (2) enclosing the side wall of the furnace body; the upper part of the water jacket (2) is connected with an air inlet of a steam pocket (23) through a pipeline; and a water inlet pipe on the lower part of the water jacket is connected with a water outlet of the steam pocket (23). The device deoxidizes the coal seam gas, can effectively control the deoxidization temperature and reduce the oxygen content in the coal seam gas to less than 0.5 percent, and maximallyreduces methane decomposition to make the methane loss less than 5 percent.

Description

technical field [0001] The invention belongs to the field of deoxidation of coal bed gas, in particular to a non-catalytic deoxidation method and device for fixed bed coal bed gas. 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 rela...

Claims

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Application Information

Patent Timeline
29 May 2013
Publication
CN101914402B
IPC
C10L3/10
Inventors
董卫果; 王鹏