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

A calcium carbide acetylene and production process technology, which is applied in the field of coal chemical industry, can solve the problems of shortening the reaction time of solid calcium carbide, not considering the utilization of waste residue, and reducing the reaction temperature, so as to achieve efficient and clean production, improve the production efficiency of calcium carbide, and improve the quality of calcium carbide Effect

Active Publication Date: 2018-10-19
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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  • Abstract
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  • Claims
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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

Method used

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

Examples

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Effect test

Embodiment 1

[0040] This embodiment is used to reduce the calcium carbide acetylene production process that carbide slag produces, combining figure 1 As shown, it specifically includes the following steps:

[0041] S1. Preparation materials: After deep deliming of coke from a factory with an ash content of 12.02wt% and a fixed carbon content of 70.03wt% in a micro-nano bubble deashing device in NaOH solution medium, the obtained ash content is 4.79wt%. Delimed coke with a fixed carbon content of 92.09wt% (as shown in Table 1); after mixing delimed coke with quicklime (purity not less than 99.0wt%) according to the carbon-calcium molar ratio of 2.7:1, perform ultrafine Prepare superfine mixture with particle size less than 100um;

[0042] S2. Wet granulation molding: mix the superfine mixture and water according to the mass ratio of 65:35, so that the calcium oxide is completely digested; the digested mixture is granulated in a disc granulator to obtain Cylindrical calcium carbide raw mat...

Embodiment 2

[0063] This embodiment is used to reduce the calcium carbide acetylene production process that carbide slag produces, combining figure 1 As shown, it specifically includes the following steps:

[0064] S1. Preparation of materials: After deep deliming of a factory coke with an ash content of 12.02wt% and a fixed carbon content of 70.03wt% in an ultrasonic device in a NaOH solution medium, the obtained ash content is 4.79wt%, and the fixed carbon content is 92.09wt% delimed coke; after mixing delimed coke and calcium hydroxide (purity not less than 99.0wt%) according to the carbon-calcium molar ratio of 2.7:1, then superfine to obtain a powder material with a particle size of less than 100um ;

[0065] S2. Wet granulation molding: mix the superfine mixture and kerosene evenly according to the mass ratio of 100:25, and then granulate in a disc granulator to obtain a spherical calcium carbide raw material group with a particle size of 1 cm;

[0066] S3. Calcium carbide synthesi...

Embodiment 3

[0074] The present embodiment is used to reduce the calcium carbide acetylene production process that carbide slag produces, specifically comprises the following steps:

[0075] S1. Preparation materials: After deep deliming of raw coal from a factory with an ash content of 10.73wt% and a fixed carbon content of 71.95wt% in a microwave-microbubble deashing device in NaOH solution medium, an ash content of 1.22wt% was obtained , deashed coal with a fixed carbon content of 81.84wt% (as shown in Table 2); after mixing deashed coal with calcite (calcium carbonate purity of 98.2wt%) according to the carbon-calcium molar ratio of 3.2:1, ultrafine Chemically prepare ultra-fine mixture with particle size less than 100um;

[0076] S2. Wet granulation molding: mix the superfine mixture and water evenly according to the mass ratio of 78:22, and then granulate in a disc granulator to obtain a spherical calcium carbide raw material group with a particle size of 0.75cm ;

[0077]S3. Calci...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C11/24C07C1/04C01B32/942
CPCC07C1/04C01B32/942C07C11/24
Inventor 姜标赵虹齐会杰黄伟光
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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