Methanation reaction process

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...

AI Technical Summary

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.

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