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A method and equipment for deoxidizing low-concentration oxygen-containing coalbed methane

A coalbed methane, low-concentration technology, used in gas fuel, petroleum industry, fuel and other directions, can solve the problem that natural gas production and reserves cannot meet the needs of social and economic development, and achieve low operating costs, less equipment investment, and compact process flow. Effect

Active Publication Date: 2017-03-15
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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  • A method and equipment for deoxidizing low-concentration oxygen-containing coalbed methane
  • A method and equipment for deoxidizing low-concentration oxygen-containing coalbed methane
  • A method and equipment for deoxidizing low-concentration oxygen-containing coalbed methane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

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

[0039] The fixed-bed deoxyge...

Embodiment 2

[0045] The fixed-bed deoxygenation reactor has a diameter of 1000mm and a height of 1200mm. The reactor is equipped with 128 catalyst tubes with a diameter of 40mm and a length of 650mm. The baffle baffle is a round notch baffle, the notch area is 30% of the overall area of ​​the circle, and the distance between the baffles is 500mm.

[0046] The oxygen-containing coalbed methane deoxygenation process 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 . The oxygenated coalbed methane processing capacity is 350m 3 / h, the gas composition is (volume percentage): CH 4 Content 92.71%, O 2 Content 1.52%, N 2 The content is 5.72%, and the content of other gases is 0.05%. The operating temperature of the fixe...

Embodiment 3

[0050] The fixed-bed deoxygenation reactor has a diameter of 1000mm and a height of 1200mm. The reactor is equipped with 108 catalyst tubes with a diameter of 38mm and a length of 700mm. The baffle baffle is a round notch baffle, the notch area is 20% of the overall area of ​​the circle, and the distance between the baffles is 400mm.

[0051] The oxygen-containing coalbed methane deoxygenation process 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 . The oxygen-containing coalbed methane processing 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 other gases is 0.17%. The operating t...

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

Claims

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Application Information

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Patent Type & Authority Patents(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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