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Fluidized bed pump-out gas deoxidation and equipment thereof

A fluidized bed and fluidized bed reactor technology, applied in the direction of granular/powdered fuel gasification, combined combustion mitigation, etc., to achieve the effects of low cost, fast heat transfer rate, and simple structure

Inactive Publication Date: 2008-06-11
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Excess heat is removed from the reactor through heat exchange tubes

Method used

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  • Fluidized bed pump-out gas deoxidation and equipment thereof
  • Fluidized bed pump-out gas deoxidation and equipment thereof
  • Fluidized bed pump-out gas deoxidation and equipment thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Shanxian County Xinglong coal coke particles are used as deoxidizers, and the particle size is less than 8mm. The operating conditions are: temperature 400°C, pressure 0.1MPa (absolute pressure). The composition of the exhaust gas at the inlet is (volume percentage): CH 4 Content 50%, N 2 Content 40%, O 2 Content 10%. Firstly, put coke particles with a particle size of 3 , in the dense phase area at the bottom of the reactor 13, the coke particles are fluidized and fully mixed, and the oxygen in the exhaust gas and the coke undergo a partial oxidation reaction under the above temperature conditions. When the oxygen is consumed, heat is released to maintain the deoxidation reaction. Since the released heat is more than the heat required to maintain the deoxidation reaction, the remaining heat needs to be removed through the heat exchange pipe set 35 provided in the reactor, and the heat exchange rate is adjusted by controlling the heat exchange amount to maintain the ...

Embodiment 2

[0022] Coal coke particles from Bin County, Shaanxi Province were used as the deoxidizer, and the particle size, operating conditions, and inlet exhaust gas composition were the same as those in Example 1. After 8 hours of stable operation, there is no oxygen in the gas after water washing, CH 4 content nearly 50%, N 2 Content about 30.2%, CO 2 7.2% content, 3.6% CO content, also includes trace amount of H 2 .

Embodiment 3

[0024] Shan County Xinglong coal char particles were used as the deoxidizer, and the particle size and operating conditions were the same as in Example 1. The composition of the exhaust gas at the inlet is (volume percentage): CH 4 Content 70%, N 2 Content 24%, O 2 Content 6%. After 8 hours of stable operation, there is no oxygen in the gas after water washing, CH 4 Content 69.5%, N 2 Content about 23%, CO 2 content of 4.8%, CO content of 2.7%, also includes trace H 2 .

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Abstract

The pumping and venting deoxygenation method with fluid bed comprises: with coked particle as the deoxidizer and fluid bed reactor, pumping gas into the fluid bed to fluidize the particle and mix the gas and solid completely; producing part oxidation reaction by the O2 in gas and C in coked particle at low temperature as 400-500Deg to consume O2 and release some heat; removing the residual heat conveniently for the fast heat transfer rate of fluid bed, and realizing the deoxygenation purpose. This fluid bed reactor needs small investment for simple structure, has high gas treatment capacity with low energy consumption and no explosion hazard.

Description

technical field [0001] The invention belongs to a method and equipment for deoxidizing exhaust gas, in particular to a method and equipment for deoxidizing exhaust gas in a fluidized bed. Background technique [0002] my country is rich in coalbed methane resources. According to estimates, the amount of coalbed methane resources buried less than 2,000 meters is 30-35 trillion cubic meters, which is equivalent to that of conventional basic natural gas on land. The development and utilization of coalbed methane is conducive to improving the energy structure, reducing environmental pollution, and improving the safety conditions of coal mine production. The state will actively support the development of the coalbed methane industry, making it a new growth point for the coal industry. In 2000, the output of coalbed methane was about 860 million cubic meters. In 2005, it is planned to reach 3 billion to 4 billion cubic meters. In 2010, it will reach 10 billion cubic meters. In 20...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10J3/46C10J3/48
CPCY02E20/18
Inventor 吴晋沪王洋孙志强白季钢马小云
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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