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Method and equipment for deoxidizing low-concentration oxygen-containing coal bed gas

A low-concentration technology of coalbed methane, applied in the direction of gas fuel, petroleum industry, fuel, etc., can solve the problem that the production and reserves of natural gas cannot meet the needs of social and economic development, and achieve low operating costs, high system heat utilization, and process The effect of a compact process

Active Publication Date: 2015-05-20
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

[0002] As a clean, efficient and low-carbon resource, natural gas will increase significantly in China's future energy consumption structure, but the production and reserves of natural gas in my country are far from meeting the needs of social and economic development

Method used

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  • Method and equipment for deoxidizing low-concentration oxygen-containing coal bed gas
  • Method and equipment for deoxidizing low-concentration oxygen-containing coal bed gas
  • Method and equipment for deoxidizing low-concentration oxygen-containing coal bed gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The fixed bed deoxidation reactor includes a shell (7), an upper head (8), a lower head (9), an oxygen-containing coalbed gas inlet (10), a deoxygenated coalbed gas outlet (11), a temperature measuring port (12), Tubes (13), tube sheets (14), vertical tubes (13) are arranged in the casing (7), the upper ends of the tubes are fixed on the tube sheet (14) connected to the casing (7), and the columns Three baffles (15) are installed between the tubes, the upper part of the shell (7) below the tube plate (14) has an oxygen-containing coalbed gas inlet (10), and the top of the upper head (8) has a deoxidation The coal bed gas outlet (11), the lower head (9) has a temperature measuring port (12).

[0038]The lower end of the tube array (13) is the tube gas inlet (16), the upper end is the tube gas outlet (20), the inner lower part of the tube tube (13) has a support packing (17), the middle part is a catalyst bed (18), and the upper part has filler (19).

[0039] The diamet...

Embodiment 2

[0045] The diameter of the fixed-bed deoxygenation reactor is 1000mm, and the height is 1200mm. There are 128 catalyst tubes installed in the reactor. The diameter of the tubes is 40mm, and the length is 650mm. The deflection baffle is a circular baffle, the area of ​​the gap is 30% of the overall area of ​​the circle, and the distance between the baffles is 500mm.

[0046] The deoxygenation process of oxygen-containing coalbed methane and the structure of the fixed-bed deoxygenation reactor are as described in Example 1. The deoxidation catalyst uses Cu as the catalytic active component, the active component content is 15wt%, the carrier alumina content is 85wt%, the catalyst particle size is 0.4-1.0mm, and the pore volume is 0.5cm 3 / g, bulk density 0.80g / cm 3 . Oxygen-containing coalbed methane treatment capacity is 350m 3 / h, the gas composition is (volume percentage): CH 4 Content 92.71%, O 2 Content 1.52%, N 2 Content 5.72%, other gas content 0.05%. The operating ...

Embodiment 3

[0050] The diameter of the fixed bed deoxygenation reactor is 1000mm, and the height is 1200mm. There are 108 catalyst tubes installed in the reactor. The diameter of the tubes is 38mm, and the length is 700mm. The deflection baffle is a circular baffle, the area of ​​the gap is 20% of the overall area of ​​the circle, and the distance between the baffles is 400mm.

[0051] The deoxygenation process of oxygen-containing coalbed methane and the structure of the fixed-bed deoxygenation reactor are as described in Example 1. The deoxidation catalyst is spherical, with Cu as the catalytic active component, the active component content is 20wt%, the carrier alumina content is 80wt%, the catalyst particle size is 0.6-1.2mm, and the pore volume is 0.4cm 3 / g, bulk density 0.68g / cm 3 . Oxygen-containing coalbed methane treatment capacity is 300m 3 / h, the gas composition is (volume percentage): CH 4 Content 85.69%, O 2 Content 3.01%, N 2 The content is 11.13%, and the content of...

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Abstract

The invention discloses a method for deoxidizing a low-concentration oxygen-containing coal bed gas. The method comprises the following steps: preheating a fixed bed deoxidization reactor; feeding the oxygen-containing coal bed gas into the reactor after penetrating through a flame arrester, a preheater and a preheater bypass; carrying out deoxidization reaction when the reaction temperature is 350-650 DEG C, the operation pressure is 0-0.4MPa and the gaseous hourly space velocity is 2,000-20,000h<-1>; feeding a hot deoxidized coal bed gas into the preheater and exchanging heat with a cold oxygen-containing coal bed gas; and feeding the cooled oxygen-containing coal bed gas into a cooler, cooling and dewatering, and feeding to a coal bed gas delivery pipeline. The method has the advantages of being good in safety, good in deoxidization effect, low in investment, convenient to operate and low in operation cost.

Description

technical field [0001] The invention relates to a deoxidation method and equipment for low-concentration oxygen-containing coal bed gas. Background technique [0002] As a clean, efficient, and low-carbon resource, natural gas will increase substantially in China's energy consumption structure in the future, but the production and reserves of natural gas in my country are far from meeting the needs of social and economic development. Therefore, the development and utilization of unconventional natural gas (coal bed methane, shale gas) is of great significance to increase energy supply, reduce environmental pollution, and ensure sustainable development of social economy, resources, and environment. [0003] Coal bed methane is methane gas associated with coal. my country is a large coal production and consumption country. During the coal mining process, a large amount of coal bed methane is emitted, which not only wastes resources, but also increases the greenhouse effect of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L3/10
Inventor 赵建涛方惠斌张磊黄戒介张永奇房倚天王建国王洋
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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