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METHOD FOR THERMALLY REFORMING COAL HAVING LOW RANK OF COALIFICATION
METHOD FOR THERMALLY REFORMING COAL HAVING LOW RANK OF COALIFICATION
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机译：低级煤热重整方法
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摘要
PURPOSE:To reform coal having a low rank of coalification with high thermal efficiency into caking coal which hardly suffers spontaneous ignition, by adding pitch and water to coal having low rank of coalification to form a slurry, heat- treating the slurry under pressure and effecting heat exchange between the slurry after heating. CONSTITUTION:Coal having a low rank of coalification is crushed in a crusher 1. 0.02-2pts.wt. pitch such as coal tar and water or a mixture of water and an org. solvent such as toluene are added to one pt.wt. (on a dry basis) said coal and the mixture is mixed in a mixing tank 2 to form a slurry. The slurry is pressurized by a pressure pump 3, introduced through a heat exchanger 4 into a heating over 5 and heat-treated at 150-370 deg.C under pressure higher than saturated vapor pressure of water at that temp. to reform said coa. The treated slurry is fed to the heat exchanger 4 to make heat exchange between the slurry before heating and said slurry, and the resulting reformed coal is passed through an evaporator 7, a solid-liquid separator 9, etc. and recovered.
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