Method and system for preparing benzene from low-rank coal
A low-rank coal and high-quality coal technology, applied in the field of metallurgy, can solve the problems of low efficiency of direct combustion or gasification, inability to fully utilize resource value, high water content of low-rank coal, and achieve low processing difficulty, clean and efficient utilization, The effect of increasing yield
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[0123] The limestone is crushed to less than 45mm, and the particle size of 5~45mm is selected, and it is transported to the coke oven for firing via a belt. The low- and medium-rank coal is crushed to below 25mm, with a particle size of 5-25mm, and transported to the coke oven for pyrolysis via a belt. The mass ratio of middle and low rank coal to limestone is 1:2, and the heating temperature of the coke oven combustion chamber is 1000°C. After 12 hours of firing and pyrolysis, the upgraded coal and quicklime enter the mixing tank for mixing, and the mixed material is loaded into the high-level trough of the calcium carbide production system, and then loaded into the calcium carbide furnace to produce calcium carbide. The produced calcium carbide is cooled and crushed, the particle size of the calcium carbide is controlled between 50 and 80 mm, and then enters the acetylene generator to react to obtain acetylene. Through this system, about 348kg of acetylene, 88kg of hydrogen...
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