APPARATUS FOR DUST REDUCTION AND DISPERSION SUPPLY OF INPUT COAL IN SYSTEM FOR DRYING COAL USING REHEAT STEAM

摘要

The present invention relates to an apparatus for, in a multi-stage dryer for drying coal using reheat steam, minimizing occurrence of dust and dispersedly supplying coal to a transfer device when coal is supplied to the multi-stage dryer from a fixed quantity coal supplier by way of a pulverizer. The present invention relates to an apparatus for drying coal using reheat steam, the apparatus being configured so that coal which has been dried primarily in a first coal dryer is inputted into a second coal dryer and thus is secondarily dried. The apparatus comprises a fixed quantity coal supplier for supplying a fixed amount of coal onto the surface heading for the top of a first transfer plate, and comprises a dust reducer consisting of: an inlet pipe coupled by a bearing to a discharge port of the fixed quantity coal supplier; a worm wheel coupled to the outer circumferential surface of the inlet pipe; a worm which is coupled by a gear to the worm wheel and which rotates by a rotator power delivered from a motor; a bent pipe having an upper end coupled to the inlet pipe; and an outlet pipe coupled to one end of the bent pipe. The dust reducer, which rotates at a certain speed, reduces the speed of coal being supplied from the fixed quantity coal supplier, thereby minimizing dust occurrence from coal which is inputted into the surface heading for the top of the first transfer plate.