Methane synthesis reactor

Abstract

The invention provides a methane synthesis reactor. A plurality of parallel flow or counter flow heat exchange pipes are added in the reactor; and a large amount of heat generated by the methane synthesis reaction are removed by feed gas in the heat exchange pipes so as to reduce the temperature of a catalyst bed layer and lead the temperature of the bed layer to be distributed more evenly. When the feed gas in the parallel flow or counter flow heat exchange pipes can not remove the reaction heat in time, chilling gas can be started for direct chilling so as to adjust the temperature of the catalyst bed layer and guarantee the smooth process of the reaction. The reactor has reasonable structure and convenient manufacture, effectively utilizes reaction heat, and has equalizing temperature on the catalyst bed layer and little circulating gas amount.

Description

technical field [0001] The invention relates to the field of methane synthesis, in particular to a methane synthesis reactor. Background technique [0002] The methane synthesis reaction is at high temperature and in the presence of a catalyst, CO, CO 2 and H 2 react to produce CH 4 and H 2 O. The methane synthesis reaction is a strongly exothermic reaction, and the value of the adiabatic temperature rise is roughly: [0003] [0004] [0005] At the same time, the operating temperature of the methane synthesis reaction is relatively high, and the reaction heat must be removed from the reactor in time to control the reaction temperature in order to ensure the normal operation of the reactor. In order to effectively remove a large amount of heat of reaction, stabilize the operation of the reactor, and prolong the service life of the catalyst, the structure of the reactor has become one of the core technologies of the methanation process. [0006] The methanation r...

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Problems solved by technology

In U.S. Patent US 4,064,256 and Danish Topsoe Syngas Production Natural Gas Process (U.S. Patents US 4,298,694, US4,130,573), 2 or 3 adiabatic reactors are used in series, and the product gas is circulated in large quantities to remove the heat of reaction and reduce the heat insulation The catalyst bed temperature of the reactor enables the strongly exothermic methane synthesis reaction to be fully carried out within the operating temperature range of the catalyst, but the higher operating temperature of the reactor imposes a burden on the material selection and cost of the equipment. , Excessive product gas circulation will directly increase the linear velocity of the reaction gas and the height of the catalyst bed, resulting in an excessive pressure drop in the reactor and an increase in the power of the external circulation compressor

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