System and method for preparing ethyne through joint cracking of coal and lime
A technology for acetylene and lime is applied in the field of co-cracking of coal and lime to prepare acetylene, which can solve problems such as difficulty in operation, dust pollution and environmental pollution, and achieve the effects of avoiding environmental pollution, reducing waste of resources and reducing energy consumption.
Pending Publication Date: 2018-03-02
SHENWU ENVIRONMENTAL TECH CO LTD
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Problems solved by technology
If the solid product is directly used as fuel, its particle size is small, the operation is difficult, and it is easy to cause dust pollution; if it is discarded or ignored, it is not only a waste of resources, but also easily causes environmental pollution.
Method used
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Embodiment 1
[0051] (1) Mix coal powder with a moisture content of approximately 3% and quicklime powder with a moisture content of approximately 1%. The molding pressure is 15MPa to obtain green pellets. The pelletizing rate of the green pellets is 95%; The pellets are activated in a fixed-bed pyrolysis furnace to obtain activated pellets at about 630 degrees Celsius and oil and gas at about 600 degrees Celsius, with an activation temperature of 750°C;
[0052] (2) Feed the high-temperature active pellets into the high-temperature smelting furnace for smelting treatment, and feed the smelted solid product into the acetylene generator to react with water to generate acetylene. The smelting temperature of the active pellets is 1900℃, and the calcium carbide content is about 81.7 %;
[0053] (3) High-temperature oil and gas plasma cracking treatment. The high-temperature oil and gas are insulated and transported into the plasma cracker. The cracking temperature is 2100°C to produce a mixture of a...
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The invention relates to a system and method for preparing ethyne through joint cracking of coal and lime. The system comprises a plasma cracking unit, a quenching unit, a multiphase separation unit,a pellet activation unit, an active pellet smelting unit and an ethyne generating unit, wherein the technologies of coal powder and lime powder shaping, coal and lime co-pyrolysis, ethyne preparationwith active pellet and oil gas respectively and the like are coupled; the effective utilization rate of raw material coal and the conversion rate of the ethyne prepared from the coal can be improved;the grading gradient utilization of the coal is realized; the powdery raw materials are used; the process energy consumption is reduced; the resource waste is reduced; an effective path is provided for the utilization of the powder material; the smelting tail gas treatment is realized; the environment pollution is avoided.
Description
Technical field [0001] The invention belongs to the technical field of organic chemical engineering, and specifically relates to a system and method for preparing acetylene by co-cracking coal and lime. Background technique [0002] Acetylene is a very important organic chemical raw material. Before it was widely used in the petroleum ethylene industry, ethylene, vinyl chloride, trichloroethylene, vinyl acetate, acrylonitrile, polyacrylonitrile, and chloroprene could be derived through a series of chemical reactions of acetylene. Chemical products such as rubber. In addition, acetylene also plays a very important role in metal processing, welding, cutting and other fields. [0003] The traditional methods of industrial production of acetylene are calcium carbide hydrolysis and methane partial oxidation. These two methods have been developed for a long time and the technology is relatively mature, but their shortcomings are obvious. The calcium carbide hydrolysis method has high e...
Claims
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IPC IPC(8): C10H21/10C07C11/24C07C4/08
CPCC10H21/10C07C4/08C07C11/24
Inventor 吴道洪赵小楠董宾丁力路丙川李东艳郭云鹏张琦张喆
Owner SHENWU ENVIRONMENTAL TECH CO LTD