| 摘要 |
PURPOSE:To make constant the amt. of production and to improve the accuracy of layer formation and treating capacity by providing a second coal discharging device just behind a bed-height detector and controlling the amt. of coal feed of a coal feeder and the amt. of coal discharge by the detected signal of the bed- height. CONSTITUTION:A float 1 is disposed in the material 28 fluidized in a coal washer. The vertical movement of the float 1 is transmitted to the bed-height detector 2 and transmitted further to a controller 9 through a signal convertor 7 and an analog memory 8. Then, a positioner 12 is operated by the control module 11 to open a slide gate 3 and move a rotary gate 4 vertically and control the discharge of coal 29. Thus, only the washed coal 27 is sent to the next tank. In this case, a second coal bed-height detector 17 and a coal discharge device 24 are provided to near a coal feeding port 30, and a motor 18 of the coal feeder 26 and a motor 25 of a coal discharge device 24 are controlled to adjust the feed amt. of the coal and the discharge amt. of the coal. Accordingly, the quantity and the quality of the coal grain on the bed after passing through the coal discharge device 24 are both held in constant range. |
