Coal slime is pulverized coal discharged in the process of coal mining,and its formation is a by-product in the washing and processing process of coal preparation plants.It is easy to agglomerate af-fecting transportation,and has certain harm to air pollution.The rotary regenerative oxidation device uti-lizes low-concentration gas from the coal mine methane drainage pumping station,which is mixed with ventilation air methane(VAM)or air to produce high-temperature flue gas.This high-temperature gas is then used to dry the slime through a hot air heat exchange device.The moisture content of the treated slime can be reduced from 25％～28％to about 12％.This process has objective positive significance for the utilization of coal mine methane and the production of coal mines,and it also improves the compre-hensive utilization of energy.
Low-concentration ventilation air methanerotary regenerative oxidationintelligent mixing
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