PULVERIZED COAL DISCHARGE QUANTITY CONTROL DEVICE

摘要

PURPOSE:To provide a pulverized coal discharge quantity control device, which can detect the cut-out speed during the reception of the pulverized coal and which can control the discharge quantity accurately without delaying the control responsiveness at the time of cutting out the pulverized coal from a feed tank of a pulverized coal blowing device of a blast furnace for the iron industry. CONSTITUTION:A pulverized coal discharge quantity control device has an internal pressure control valve 9 for leading the pressurizing gas into a feed tank 2 and a differential pressure command control meter 7 for detecting the differential pressure between the inside of a powder material transporting pipeline 8 and the inside of the feed tank 2 and for controlling the opening degree of the internal pressure control valve 9 so that the differential pressure coincides with a predetermined value. Furthermore, the device has a valve 3 for powder material fitted to a lower discharge port of the feed tank 2, a powder material flow quantity meter 4 for detecting the flow quantity of the powder material passing inside of the powder material transporting pipeline 8, and a powder material flow quantity command control meter 6 for controlling the opening degree of the valve 3 for powder material on the basis of the signal input from the powder material flow quantity meter 4 so that the powder material flow quantity coincides with a predetermined value.