Isothermal reactor and its device and method for methanation reaction

Abstract

The invention relates to an isothermal reactor, which comprises an outer cylinder body, an inner cylinder body, several heat exchange tubes, a catalyst packing plate, a raw material gas inlet pipe, a raw material gas outlet pipe, a water vapor inlet pipe and a water vapor outlet pipe; A lower partition is arranged horizontally in the outer cylinder, the inner cylinder is arranged on the upper part of the lower partition, and an upper partition is arranged horizontally in the inner cylinder. The upper and lower partitions form a closed catalytic reaction chamber with the side wall of the inner cylinder. The upper partition The plate cooperates with the top of the inner cylinder to form an airtight first chamber, the lower partition cooperates with the lower part of the outer cylinder to form an airtight second chamber, and a gas channel is formed between the outer cylinder and the inner cylinder. The invention provides an isothermal reactor and a device and method for methanation reaction using it, which can synthesize methane at low temperature without circulation, and solve the problems of long process flow, large circulating gas volume and energy utilization rate in the existing methanation process. Low, high reactor temperature problems.

Description

technical field [0001] The invention belongs to the technical field of reaction equipment, and in particular relates to an isothermal reactor and a device and method for using it to carry out methanation reaction. Background technique [0002] my country's energy structure is characterized by "more coal, less oil and less gas", which poses a potential threat to my country's energy security. Traditional coal combustion not only has low energy utilization rate but also pollutes the environment, and a large amount of coke oven gas produced in the coking process has not been rationally utilized. The production of natural gas from coal pyrolysis gas and coke oven gas through methanation can not only optimize my country's energy structure, but also make more clean and efficient use of coal resources. [0003] The principle of synthesis gas / coke oven gas methanation process is CO, CO 2 and H 2 The methanation reaction is carried out under the action of a catalyst. The main resp...

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Problems solved by technology

[0010] The purpose of the present invention is to overcome the defects of the prior art, and provide an isothermal reactor and a device and method for methanation reaction using it, which can synthesize methane at low temperature without circulation, and solve the long process flow existing in the existing methanation process , Large circulating gas volume, low energy utilization rate, high reactor temperature, difficulty in catalyst loading, etc.

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