| 摘要 |
PURPOSE:To provide a method of coal gasification capable of quickly controlling the gasifying conditions and maintaining the optimal gasifying conditions, by feeding a coal and a gasifier into a furnace kept at a high temperature and controlling the amount of the gasifier to be fed according to the concentration ratio of the formed gas component. CONSTITUTION:Pulverized coal and a gasifier is fed into the gasifying chamber in the body of a gasifying furnace 10 from feeding pipes 18, 20 through a pulver ized coal feeder 44 and a flow controlling valve 50 which have been controlled with a controller 52. the formed gas is passed through a leading pipe 30, a dust collector 32 and a desulfurizer 34 to obtain a refined gas 38. The concentra tion ratio of the formed gas is determined with a gas analyzer 36. The results are input into the controller 52. When the absolute value of the difference be tween the concentration ratio which has been obtained lately and that obtained in the last determination is larger than a predetermined value, the valve 50 is controlled so as to decrease the amount of the gasifier, while when the abso lute value is smaller than the predetermined value, the amount of the gasifier is increased.
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