System and method for catalytic purification and treatment of coal chemical raw synthesis gas

Abstract

The invention discloses a system and a method for catalytic purification treatment on a coal chemical industry crude synthesis gas. The system comprises a molten salt catalysis reaction device and a secondary purification device, wherein the molten salt catalysis reaction device is filled with molten salt; the secondary purification device is filled with an adsorbent. When the system is used, the crude synthesis gas is fed into the molten salt catalysis reaction device; fine coal powder, semi-coke granules, tar and phenolic substances in the crude synthesis gas sufficiently contact the molten salt under the viscous capturing action of the molten salt, and are subjected to catalytic cracking, gasification and reforming reaction under the action of gasses such as H2, CO, CO2 and H2O(g) in the crude synthesis gas, and then the crude synthesis gas can be purified; the crude synthesis gas purified in the molten salt catalysis reaction device is fed into the secondary purification device, and the molten salt carried by the crude synthesis gas can be desorbed through the absorbent in the secondary purification device.

Description

technical field [0001] The invention relates to the technical field of energy utilization, in particular to a system and method for catalytically purifying and treating crude synthesis gas from coal chemical industry. Background technique [0002] Coal accounts for about 77% and 70% of the total primary energy production and consumption in my country. In view of the prominent position and important role of coal in my country's energy structure, and this coal-based energy structure will not undergo substantial changes for a long period of time in the foreseeable future. Therefore, coal safety has become the top priority in the research of national energy strategy security. Therefore, it is necessary to re-examine the development model of the coal industry, change the development status quo of high consumption, heavy pollution, and large greenhouse gas emissions in the field of coal consumption, and make low-carbon and clean utilization truly implemented in all aspects of the...

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Problems solved by technology

[0008] The patent application with the publication number CN104593079A discloses that the crude synthesis gas is reheated when it is taken out of the gasifier to cause cracking and reforming reactions at high temperatures, although the tar and phenolic substances in the crude synthesis gas can be effectively removed , but the high temperature will lead to methane cracking, which is unfavorable to the natural gas production process and high energy consumption

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