Methanation reaction process

A methanation and reaction technology, applied in the field of methanation process, can solve the problems of large system resistance, easy deactivation of catalysts at high temperature, easy overheating of reactors, etc., and achieves low equipment investment and operating costs, simple and reliable temperature control, and wide The effect of market application prospects

Active Publication Date: 2017-05-17
WUHUAN ENG
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Problems solved by technology

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 investment is large, the operation energy consumption is high, the low-grade heat energy is much but cannot be effectively utilized, the system energy consumption is high, the reactor is easy to overheat, and the catalyst is easy to deactivate at high temperature, etc.

Method used

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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...

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Abstract

The invention relates to a methanation reaction process, which solves the existing problems of complex methanation reaction process, long process flow, unstable system temperature control and easy deactivation of catalysts. The technical solution includes that the raw material gas is sent to the desulfurization tank for desulfurization after gas-liquid separation in the gas-liquid separation tank, and then sent to the feed gas heater to exchange heat with the reaction gas exiting the isothermal reactor to raise the temperature, and the heated raw material gas is sent to the isothermal reaction The reacted reaction gas is sent to the feed gas heater to exchange heat with the feed gas to cool down, and then sent to the low-temperature adiabatic reactor for further full reaction to obtain methane gas. The technical process of the invention is extremely simple, reliable in control, low in equipment investment, low in operating cost, energy-saving and consumption-reducing, and high-grade steam can be obtained.

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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L3/08
Inventor 张宗飞唐凤金汤连英晏双华徐建民
Owner WUHUAN ENG
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