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A fixed-bed coalbed gas non-catalytic deoxidation device and method

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 long residence time, no cooling measures, high equipment investment, etc., achieve small loss of methane content, complete and efficient treatment, and complete oxygen removal quick effect

Inactive Publication Date: 2018-08-03
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The side wall of the furnace body of the device in this patent is equipped with a water jacket, which can well control the temperature in the furnace; the lower part of the furnace body adopts a water seal device to prevent the coalbed gas from overflowing from the bottom of the device; the process in this patent adopts reflux Part of the deoxidized and cooled CBM is transferred to the CBM before deoxidation, which can well adjust the oxygen content in the deoxidized CBM; however, the device and process of this patent still have deficiencies: the cooling effect of the water jacket is not very good, and the furnace The temperature inside the furnace is not uniform, and the temperature in the center of the furnace body may be too high, resulting in the loss of methane cracking; another shortcoming in this patent: the consumption of deoxygenation fuel in the process of non-catalytic deoxidation of coal bed methane by using this device is large, and the coal heat The solution process produces a large amount of H 2 , which brings separation difficulties for subsequent processing, and high investment in equipment
[0009] Most of the existing fixed bed devices are designed for coal gasification, and they have some disadvantages when used for non-catalytic deoxidation of coal bed methane: 1) The height and diameter are relatively large, and the gas stays in the furnace for a long time, resulting in serious methane loss; 2) The device is Adiabatic, without cooling measures, unable to remove too much heat in the device in time, resulting in too high temperature in the reactor, resulting in a large amount of methane cracking and serious loss; H 2 , subsequent separation is difficult, and equipment investment is high

Method used

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  • A fixed-bed coalbed gas non-catalytic deoxidation device and method
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  • A fixed-bed coalbed gas non-catalytic deoxidation device and method

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Effect test

Embodiment 1

[0058] Embodiment 1: Provide a kind of deoxidation method that methane content is below 30%

[0059] Open the circulating gas regulating valve 11, circulating gas compressor 13, intake regulating valve 17, branch regulating valve 20, water spray regulating valve 8, circulating water regulating valve 9 and centrifugal separator 5 of the fixed bed coalbed methane non-catalytic deoxygenation device After the separated water is switched on and off, add coke with a particle size of 50-120mm into the deoxidation furnace, the feeding amount is 300kg / h, and the flow rate is 5520Nm 3CBM / h (gas flow rate is 0.2m / s) passes through the flame arrester 14, pressure sensor 15, overpressure cut-off valve 16, air intake pressure regulating valve 17, and stopper to prevent the backflow of CBM on the CBM inlet pipeline 23. After returning to the valve 18 and the coal bed gas flow meter 19, the grate 26 and the upper air inlet enter the corresponding furnace body for deoxidation reaction with the...

Embodiment 2

[0062] Embodiment 2: Provide a kind of deoxidation method that methane content is 30%~80%

[0063] Close the circulating gas regulating valve 11 and the circulating gas compressor 13 of the fixed-bed CBM non-catalytic deoxygenation device, open the intake regulating valve 17, the branch regulating valve 20, the water spray regulating valve 8, the circulating water regulating valve 9 and the centrifugal separator 5. After the separated water is turned on and off, add the fat coal with a particle size of 3-50mm into the fixed bed deoxidation furnace 1, the feeding amount is 250kg / h, and the flow rate is 5520Nm 3 CBM / h (airflow velocity is 0.2m / s) passes through the flame arrester 14, pressure sensor 15, overpressure cut-off valve 16, intake pressure regulating valve 17 on the CBM inlet pipeline 23, and the stopper to prevent the CBM from flowing backward. After returning to the valve 18 and the coal bed gas flow meter 19, it enters the furnace body through the grate 26 and the u...

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Abstract

The invention discloses a fixed-bed coal seam gas non-catalytic deoxygenation device and method.The device comprises a fixed-bed deoxygenation furnace, wherein a sidewall and conical top of a furnace body are provided with a water jacket surrounding the sidewall and the conical top; the upper portion of the water jacket at the conical top is connected with a water inlet of a steam drum, and the bottom of the water jacket is connected with a water outlet of the steam drum; a circular coal seam gas pipe and a water spray pipe are arranged in the furnace body.By using the device to deoxygenate coal seam gas, H2 produced in coal pyrolysis and water gas reaction is made full use in deoxygenation, the coal seam gas enters the furnace body through upper and lower paths, coal seam gas treatment quantity is high, deoxygenation temperature is effectively controlled, oxygen content of the coal seam gas is decreased to below 0.5%, methane splitting can be reduced maximally, and methane loss is below 5%.

Description

technical field [0001] The invention belongs to the field of coal gas deoxidation, and in particular relates to a fixed bed coal bed gas non-catalytic deoxidation device and method. Background technique [0002] Coalbed methane, commonly known as coal mine gas, is a gas resource that is associated and symbiotic with coal. The main component is methane, and it also contains a certain amount of carbon dioxide, nitrogen and oxygen. It is an unconventional natural gas. Coalbed methane is explosive and is the main cause of accidents in coal mines. In fact, coalbed methane is also a kind of energy with high calorific value and no pollution. It can be used in various industries such as power generation, industry, and chemical industry, and can also be directly used in residents' lives. Methane is a greenhouse gas, and its greenhouse effect is more than 20 times that of carbon dioxide. If coalbed methane can be used reasonably, it can make up for energy shortages, and the recycling...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L3/10
CPCC10L3/101
Inventor 张国杰赵培玉郝兰霞徐英贾永屈江文苏爱廷孙映晖张永发
Owner TAIYUAN UNIV OF TECH
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