Method and structure of preventing channel of reactor for preparing ethyne by cracking plasma coal from coking

Abstract

The invention discloses a method and structure to prevent a plasma coal pyrolysis reactor channel from coking. An annular combustor is set in the lower part of the coal and plasma jet mixing section in the reactor. There is a ring slit between the combustor chamber annular inner wall and its channel inner wall, which can rapidly release high temperature and high pressure gas generated from rapid combustion or reaction in the combustion chamber. A high temperature and high speed film formed in the inner wall of channel can prevent contact between channel inner wall gasified carbon as well as melting coal particles, therefore preventing the reactor channel from coking.

Description

technical field [0001] The invention relates to a process and device for producing acetylene by plasma coal cracking. Background technique [0002] In the past 20 years, scientists at home and abroad have carried out a lot of basic research work on the laboratory scale of hydrogen plasma production of acetylene technology, and achieved rich research results. The scientific nature of plasma cracking coal production of acetylene has been verified. Scientific research results show that the technical route of plasma cracking coal to acetylene has the advantages of no environmental pollution, short process, and low energy consumption (70% of the calcium carbide method), but the two key technical issues of coking in the reactor and increasing the yield of acetylene have not been solved. solve. [0003] At present, the process technology of thermal plasma cracking coal to acetylene is still in the pilot test stage in the world, and there are no reports of large-scale industrialize...

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Problems solved by technology

[0007] Aiming at the problem of coking in the channel of the plasma coal cracking to produce acetylene reactor, the present invention proposes a method and structure for preventing the plasma coal cracking to produce acetylene reactor channel from coking on the basis of the existing pilot test device for plasma coal cracking to produce acetylene , in the lower part of the pulverized coal and plasma jet mixing section, add a high-temperature and high-pressure combustion chamber. The combustion chamber uses materials that can burn quickly. A high-temperature and high-speed gas film is formed on the inner wall to prevent gaseous carbon and melted coal particles from contacting the inner wall of the channel, so as to prevent coking of the reactor channel

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