引言两次石油危机之后全世界能源需求的增长渐趋下降。众所周知,危机后电站的能源由广泛使用的主要燃料石油向气体燃料和煤伸展。虽然能源消费的上升曾一度下跌,但现在又趋向回升,据说其增长率还高于原先的估计。在这样的情况下,能源就自然趋向于蕴藏量大的煤。许多设备使用的是煤粉,但为了使煤能在便利的形式下充分燃烧,新的煤的使用方法如水煤浆混烧、煤的气化或液化 INTRODUCTION The growth in energy demand worldwide has been declining after both oil crises. It is well-known that after the crisis the energy of the power station will be extended to gas fuels and coal from the widely used major fuel oil. Although the rise in energy consumption once fell, it is now on the rise again and its growth rate is said to be still above its previous estimate. Under such circumstances, energy naturally tends to contain large reserves of coal. Many devices use pulverized coal, but to make it possible to burn coal in a convenient form, new coal uses such as coal-water slurry co-firing, coal gasification or liquefaction