COAL GASIFICATION, COAL CONVEYANCE SYSTEM AND COAL GASIFICATION-COMBINED POWER-GENERATING PLANT

PROBLEM TO BE SOLVED: To provide a coal gasification, coal conveyance system which can stably convey coal to a gasification furnace when operating by changing load of the gasification furnace corresponding to the target output value of power generation, and can control the conveyance of coal to the gasification furnace with excellent responsibility to pressure fluctuation of the gasification furnace when pressure of the gasification furnace temporarily fluctuates.SOLUTION: This coal gasification, coal conveyance system is equipped with: a gasification furnace; a feed hopper storing coal pressurized to higher pressure than the gasification furnace; and a conveyance pipe for airflow-conveying coal from the feed hopper to the gasification furnace using an inert gas, wherein a plurality of feed systems feeding the inert gas from the bottom of the feed hopper and from the side face of a cone part are respectively provided; and flow regulating valves to regulate the flow rate of the inert gas are provided at each of the plurality of feed systems. The coal gasification, coal conveyance system is provided with a control device to control flow rate of the inert gas supplied to the feed hopper by operating the plurality of flow regulating valves, and to control the conveying flow rate of coal by changing the feed proportion of the inert gas supplied to the feed hopper.