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Device and method for preparing methane through catalytic gasification of oxygen carrier coal

A technology of catalytic gas and oxygen carrier, applied in the field of coal-to-methane production, can solve the problems of poor operation stability, low carbon conversion rate, low methane yield, etc. Effect

Pending Publication Date: 2021-12-28
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the deficiencies in the above-mentioned prior art, the object of the present invention is to provide a device for producing methane by catalytic gasification of oxygen-carrier coal, which effectively solves the problem of low carbon conversion rate, low methane yield and high energy consumption in the prior art. and poor operational stability

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  • Device and method for preparing methane through catalytic gasification of oxygen carrier coal
  • Device and method for preparing methane through catalytic gasification of oxygen carrier coal
  • Device and method for preparing methane through catalytic gasification of oxygen carrier coal

Examples

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Comparison scheme
Effect test

Embodiment 1

[0084] A new oxygen carrier coal catalytic gasification methane reaction device, the pyrolysis methane section 2 in the upper part of the gasifier 1 has an inner diameter of 2.0m and a height of 8m, and the oxidation gasification section 10 in the lower part of the gasifier 1 has an inner diameter of 1.2m and a height of 6m. The raw material inlet 19 is located at 1 / 10 of the height of the pyrolysis methane section 2 on the upper part of the gasifier 1, and the moving bed hydrogen production furnace 6 has an inner diameter of 1.5m and a height of 6m. The second hydrogen inlet 26 at the throat structure 11 is fed with a hydrogen ratio of 30%, the outer hole N1 of the gas distributor in the pyrolytic methane section 2 has an aperture of 2mm, the inner hole N2 has an aperture of 0.5mm, and the grate offset distance is 0.

[0085] Inner Mongolia lignite is selected as raw material and put into the gasification reduction furnace from the raw material inlet 19, and the oxidation carr...

Embodiment 2

[0087] A new oxygen carrier coal catalytic gasification methane reaction device, the pyrolysis methane section 2 in the upper part of the gasifier 1 has an inner diameter of 2.0m and a height of 8m, and the oxidation gasification section 10 in the lower part of the gasifier 1 has an inner diameter of 1.2m and a height of 6m. The raw material inlet 19 is located at 1 / 10 of the height of the pyrolysis methane section 2 on the upper part of the gasifier 1, and the moving bed hydrogen production furnace 6 has an inner diameter of 1.5m and a height of 6m. The second hydrogen inlet 26 at the throat structure 11 is fed with a hydrogen ratio of 0%, the outer hole N1 of the gas distributor in the pyrolytic methane section 2 has an aperture of 2mm, the inner hole N2 has an aperture of 0.5mm, and the grate offset distance is 0.

[0088] Inner Mongolia lignite is selected as raw material and put into the gasification reduction furnace from the raw material inlet 19, and the oxidation carri...

Embodiment 3

[0090] A new oxygen carrier coal catalytic gasification methane reaction device, the pyrolysis methane section 2 in the upper part of the gasifier 1 has an inner diameter of 2.0m and a height of 8m, and the oxidation gasification section 10 in the lower part of the gasifier 1 has an inner diameter of 1.2m and a height of 6m. The raw material inlet 19 is located at 1 / 10 of the height of the pyrolysis methane section 2 on the upper part of the gasifier 1, and the moving bed hydrogen production furnace 6 has an inner diameter of 1.5m and a height of 6m. The second hydrogen inlet 26 at the throat structure 11 is fed with a hydrogen ratio of 30%, the outer hole N1 of the gas distributor in the pyrolytic methane section 2 has an aperture of 2mm, the inner hole N2 has an aperture of 0.5mm, and the grate offset distance is 0.

[0091] Inner Mongolia lignite is selected as raw material and put into the gasification reduction furnace from the raw material inlet 19, and the oxidation carr...

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Abstract

The invention provides a device and a method for preparing methane through catalytic gasification of oxygen carrier coal. The device mainly comprises a gasification furnace, a gasification furnace separation unit, a hydrogen production furnace and a hydrogen production furnace separation unit, wherein the gasification furnace is provided with an oxidation gasification section, a throat structure and a methane pyrolysis section, which are sequentially communicated. Compared with the prior art, the novel device and method for preparing methane through catalytic gasification of oxygen carrier coal have the advantages that raw material coal reacts with synthesis gas, high-purity hydrogen and the oxidation carrier in the pyrolysis methanation section at the upper part of the gasification furnace to generate methane-rich synthesis gas such as tar, CH4 and H2, semicoke and a reduction carrier; wherein the reduction carrier enters the hydrogen production furnace, the semicoke enters the oxidation gasification section, the synthesis gas entering the pyrolysis methanation section comes from the oxidation gasification section, and the oxidation carrier and the high-purity hydrogen come from the hydrogen production furnace. According to the process, cyclic regeneration of the oxidation carrier is realized, heat flow and material flow are balanced, and the gasification strength, the carbon conversion rate and the methane yield are improved. The carbon conversion rate at the outlet of the device reaches 98%, and the methane content at the outlet reaches 70%.

Description

technical field [0001] The invention relates to the technical field of coal-to-methane production, in particular to a device and method for producing methane by catalytic gasification of oxygen carrier coal. Background technique [0002] Rich coal, poor oil, and little gas are the characteristics of my country's energy structure. With the rapid development of my country's economy and the acceleration of urbanization, the demand for natural gas is increasing. my country's own natural gas production cannot meet the demand, and the contradiction between supply and demand has become increasingly prominent. The supply gap can only be made up by relying on imports, which has greatly affected my country's energy security. In view of the fact that my country is a large coal country, using abundant coal resources to convert coal into natural gas is an important way for clean and efficient utilization of coal, which is suitable for my country's national conditions and greatly alleviat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L3/08C10J3/00C10J3/72C10J3/84
CPCC10L3/08C10J3/00C10J3/725C10J3/84C10J2300/093C10J2300/0983C10J2300/0986C10J2300/1662C10J2300/1807Y02P20/52
Inventor 金渭龙钟思青徐俊李勇征
Owner CHINA PETROLEUM & CHEM CORP
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