Methanation reaction process

A methanation and reaction technology, applied in the field of methanation process, can solve the problems of large system resistance, high-temperature deactivation of catalyst, easy overheating of reactor, etc., and achieve low equipment investment and operation cost, simple and reliable temperature control, and broad Effect of Market Application Prospects

CN104152198AActive Publication Date: 2014-11-19WUHUAN ENG
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2014-11-19

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Abstract

The invention relates to a methanation reaction process, and is used for solving the problems that existing methanation reaction processes are complex and are long in flows, system temperatures are instable to control and catalysts are easy to inactivate. The methanation reaction process comprises the steps that the raw gas is sent to a desulfurization tank to be desulfurized after undergoing gas-liquid separation in a gas-liquid separation tank and then is sent to a feed gas heater to exchange heat with the reaction gas coming out of an isothermal reactor to be heated, the heated raw gas is sent to the isothermal reactor to react and the reaction gas after reaction is sent to the feed gas heater to exchange heat with the raw gas to be cooled and then is sent to a low-temperature adiabatic reactor to further fully react, thus obtaining the methane gas. The process has the advantages of extremely simple flow, reliability in control, low equipment investment, low operating cost, energy conservation and consumption reduction and capability of obtaining high-grade steam.
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Description

technical field

[0001] The invention relates to a methanation process, specifically a methanation reaction process. Background technique

[0002] The preparation of natural gas products such as SNG, LNG, and CNG by methanation reaction is an important way in natural gas chemical industry. Taking SNG as an example, the raw material gas required for SNG production is carbon monoxide and hydrogen. The methanation reaction is a process in which the raw material gas reacts with carbon monoxide and hydrogen in a methanation reactor at a certain temperature with the help of a catalyst to generate methane. . The methanation reaction is a strongly exothermic reaction and is a thermodynamically controlled process. The industrial methanation device mostly uses adiabatic fixed-bed reactors. This reaction process is generally equipped with multiple adiabatic fixed-bed reactors and multiple heat exchange equipment. The process route is long, the system resistance is large, the project i...

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Embodiment Construction

[0025] Below in conjunction with accompanying drawing, the present invention will be further explained:

[0026] The structure of the isothermal reactor D is to include a housing 16, the upper section and the lower section of the housing 16 are respectively equipped with an upper chamber water distributor 7 installed in the upper chamber support plate 11 and a lower chamber water distributor installed in the lower chamber support plate 12. The water dispenser 8, the upper chamber support plate 11 has an annular gap 10 from the wall surface of the shell 16, and the upper chamber water distributor 7 and the lower chamber distributor 8 are connected through a plurality of heat exchange tubes 13 evenly arranged, so The upper chamber water distributor 7 communicates with four evenly arranged water vapor outlet pipes 4 on the top of the housing 16, and the lower chamber water distributor 8 communicates with four evenly arranged boiler feed water pipes 3 at the bottom of the housing 1...