Coal processing to upgrade low rank coal having low oil content
    2.
    发明授权
    Coal processing to upgrade low rank coal having low oil content 有权
    煤炭加工改造含油量低的低级煤

    公开(公告)号:US08968520B2

    公开(公告)日:2015-03-03

    申请号:US13152878

    申请日:2011-06-03

    摘要: A method of treating untreated low calorific coal containing moisture and organic volatiles includes feeding untreated coal to a dryer, and drying the coal. The dried coal is subjected to a pyrolyzing step where oxygen-deficient gases are brought into contact with the coal, thereby lowering the volatile content of the coal and producing a stream of pyrolysis effluent gases. The pyrolysis effluent gases are subjected to a separation process to separate lean fuel gases from liquids and tars, wherein the separation process removes less than about 20 percent of the pyrolysis effluent gases as the liquids and tars, with the remainder being the lean fuel gases. The lean fuel gases are returned to the dryer combustor, the pyrolyzer combustor, or the pyrolyzer.

    摘要翻译: 一种处理含有水分和有机挥发物的未经处理的低热量煤的方法包括将未处理的煤进料到干燥器中,并干燥煤。 将干燥的煤进行热氧化步骤,其中使氧气不接触气体与煤接触,从而降低煤的挥发物含量并产生热解流出气体流。 将热解废气进行分离,以将贫燃料气体与液体和焦油分离,其中分离过程除去作为液体和焦油的少于约20%的热解废气,其余为贫燃料气体。 贫燃料气体返回到干燥器燃烧器,热解器燃烧器或热解器。