A kind of production method of plasma enhanced coal-to-acetylene

Abstract

The invention belongs to the field of chemical engineering and specifically relates to a method for producing acetylene by intensifying coal by virtue of plasma. According to the method, coal is taken as the raw material, is heated at a intermediate temperate in a moving-bed reactor and is then pyrolyzed, pyrolysis gas is sequentially subjected to cyclone dust removal and ceramic filtration dust removal, and then the content of dust in pyrolysis gas can meet a production process of plasma acetylene. After the dust removal, the pyrolysis gas enters an acetylene generator to generate acetylene, impurities such as carbon black, sulfur, phosphorus, fluorine and chlorine in the reaction products are removed by virtue of a temperature swing adsorbent through temperature swing adsorption (TSA), and the purified gas is subjected to heavy component removal, absorption and concentration, so as to obtain a byproduct, namely hydrogen. By virtue of process characteristics that the heat is realized in a cooling process of the reaction products and is absorbed in a heating process of the raw material in the technical process, the adequate application of heat in a system is realized through the coupling of heat in the technical process; and semi-coke and the pyrolysis gas are obtained by virtue of an intermediate-temperature pyrolysis manner, so that the high energy consumption caused by high-temperature pyrolysis is avoided.

Description

technical field [0001] The invention belongs to the field of chemical industry, in particular to a production method of plasma-intensified coal-based acetylene. Background technique [0002] Acetylene is an important basic raw material in the organic synthesis industry. It can be used to produce polyvinyl chloride, neoprene rubber, polyvinyl alcohol, acetylene carbon black, trichloroethylene, methyl butynol, propyne pure, etc. It can also be used as a desulfurizer for steel , also used in metal cutting and welding gases. my country is the world's largest producer of acetylene, and acetylene products are mainly obtained through the calcium carbide method. There are more than 450 calcium carbide production enterprises in my country. In 2010, the production capacity of calcium carbide was 22 million tons, and the output was 15 million tons. Based on the output of 10 million tons of closed calcium carbide, a total of 4 billion Nm of calcium carbide furnace tail gas is produced...

AI Technical Summary

Problems solved by technology

[0004] At present, in the coal-to-acetylene process, there are mainly the following technical bottlenecks: one is that the existing method uses coal directly into the plasma reactor to produce acetylene, and the coal is easy to coke and agglomerate at high temperature, resulting in blockage of the plasma reactor; the other is that the product in this method The amount of dust entrained in the air is large, and it is difficult to remove, which makes it impossible to carry out follow-up work

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