褐煤汽爆提质新方法

Research on steam explosion device for lignite upgrading

利用汽爆方法对内蒙褐煤进行了汽爆粉碎和改质初步研究,考察了汽爆设备、工艺条件和汽爆效果,同时进行了汽爆工艺条件对褐煤改质的影响。结果显示,单次汽爆过程对褐煤具有明显的粉碎效果,汽爆过程对褐煤具有显著的改质作用。停留1 h,随着汽爆温度的提高,褐煤水分降幅达63.6%,挥发分降低11.3%,氧质量分数降低48%,含碳量提高了12.9%,褐煤质量得到明显改善。

A steam explosion grinding and upgrading study was carried on method. The investigation was conducted on the process conditions, and Neimeng lignite with the steam explosion the steam explosion effects , meanwhile, the influence of process conditions of the steam explosion on lignite upgrading were also studied. The results show that the steam explosion has great effects on lignite grinding and lignite upgrading. When the residence time is 1 h, with the increasing of the steam explosion temperature , the lignite moisture decrease by 63.6%, the volatile decresse by 11.3% and the oxygen content decrease by 48% ,while the carbon content increase by 12.9%. The lignite quality is improved after upgrading