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
CN113845950APending Publication Date: 2021-12-28CHINA PETROLEUM & CHEM CORP +1
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEM CORP
Publication Date
2021-12-28

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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%.
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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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