Calcium carbide acetylene production technology capable of reducing generation of calcium carbide slag

Abstract

The invention discloses a calcium carbide acetylene production technology capable of reducing generation of calcium carbide slag. The calcium carbide acetylene production technology comprises the following reaction steps: S1, preparing an ultrafine deashed carbon source material and a calcium source material; S2, adding mixture of the ultrafine deasehd carbon source material and the calcium sourcematerial into a binding agent, feeding in a pelletizer, and forming by adopting wet granulation, thus obtaining calcium carbide raw material balls in certain size; S3, putting the obtained raw material balls in a calcium carbide synthetic furnace for heating and smelting; S4, introducing CO2 gas in certain concentration in a high-temperature solid-phase product obtained through reaction, and carrying out decarbonization and heat exchange; merging a produced gas into furnace gas, separating and purifying the mixed gas after carrying out heat exchange and dedusting, and feeding the treated gasinto a storage tank or to next process; S5, developing gas by calcium carbide, thus obtaining an acetylene gas and calcium hydroxide slurry; S6, recycling the calcium source material; S7, stopping recycling of the calcium source material when the amount of impurities in the calcium hydroxide slurry exceeds 20 weight percent of calcium groups, and removing the calcium hydroxide slurry, thus obtaining calcium carbide slag. According to the calcium carbide acetylene production technology disclosed by the invention, the calcium source material is recycled, and meanwhile, no scorification / less scorification during a calcium carbide process and great improvement of quality of the calcium carbide can be realized.

Description

technical field [0001] The invention belongs to the technical field of coal chemical industry, and in particular relates to a production process of calcium carbide acetylene with little or no generation of calcium carbide slag. Background technique [0002] Acetylene is known as "the mother of modern organic synthesis industry" internationally. It can chemically react with many substances to derive thousands of organic compounds, such as polyvinyl chloride, acetic acid, vinyl acetate, acrylic acid, butadiene, and chloroprene. Rubber, trichloroethylene, tetrachloroethylene, acetylene black, etc. In my country, the most important raw material for the production of acetylene is calcium carbide. The organic synthesis of calcium carbide and acetylene has a long history in the chemical industry, and it occupies a certain proportion in chemical production. [0003] In the process of producing acetylene from calcium carbide in industry, calcium carbide slag with a calcium oxide con...

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Problems solved by technology

[0004] Chinese patent documents 201711406332.X and 201721825097.5 disclose a method and system for producing solid calcium carbide by using microwave energy and producing acetylene by gas generation, and co-producing carbon monoxide at the same time. The patent proposes that solid calcium carbide can be synthesized by microwave energy, which can reduce the reaction temperature and shorten the production time. The reaction time of solid carbide formation can significantly save energy and reduce consumption, but the utilization of waste residue in the process is not considered

[0005] In view of the current problems in the calcium carbide acetylene industry, such as large output of carbide slag, poor economy, low reutilization rate, and difficult post-processing, it is urgent for those skilled in the art to propose a clean calcium carbide acetylene production process without or less carbide slag. Realize the circular economical production of calcium carbide acetylene by recycling calcium resources, and promote the green and clean development of the calcium carbide acetylene industry

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