Apparatus for dust reduction and dispersion supply of input coal in system for drying coal using reheat steam

An apparatus for dust reduction and dispersion supply of input coal in a system for drying coal using reheat steam including

• a first coal dryer in which a pair of first drive sprockets and a pair of first driven sprockets are spaced apart from each other at a predetermined distance to be fastened to first chains, respectively, a plurality of transfer plates is hinge-coupled between the first chains, a pair of first guide rails horizontally supporting a first transfer plate is installed below an upper second chain connected between a first drive sprocket and a first driven sprocket, a pair of second guide rails horizontally supporting a first transfer plate is installed below a lower first chain connected between the first drive sprocket and the first driven sprocket, a first steam chamber injecting reheat steam supplied from a reheater is installed below an upper first chain, a second steam chamber injecting reheat steam supplied from the reheater is installed below the lower first chain, a first exhaust gas chamber collecting exhaust gas is installed on the upper first chain, and a second exhaust gas chamber collecting exhaust gas is installed on the lower first chain, and
• a second coal dryer in which a pair of second drive sprockets and a pair of second driven sprockets are spaced apart from each other at a predetermined distance to be fastened to second chains, respectively, a plurality of transfer plates is hinge-coupled between the second chains, a pair of second guide rails horizontally supporting a second transfer plate is installed below an upper second chain connected between a second drive sprocket and a second driven sprocket, a pair of second guide rails horizontally supporting the second transfer plate is installed below a lower second chain connected between the second drive sprocket and the second driven sprocket, a third steam chamber injecting reheat steam supplied from the reheater is installed below the upper second chain, a fourth steam chamber injecting reheat steam supplied from the reheater is installed below the lower second chain, a third exhaust gas chamber collecting exhaust gas is installed on the upper second chain, and a fourth exhaust gas chamber collecting exhaust gas is installed on the lower second chain,
• wherein coal which is primarily dried in the first coal dryer is inputted into the second coal dryer and thus is secondarily dried, the apparatus comprising:
• a coal constant feeder supplying a predetermined amount of coal onto an upward surface of the first transfer plate;
• and
• a dust reducer constituted by
• an inlet pipe coupled to an outlet of the coal constant feeder by a bearing,
• a worm wheel coupled onto the outer periphery of the inlet pipe,
• a worm gear-coupled with the worm wheel and rotating with rotary force transferred from a motor,
• a curved pipe of which a top is coupled to the inlet pipe, and an outlet pipe coupled to the end of the curved pipe,
• wherein the dust reducer which rotates at a predetermined velocity reduces velocity of the coal supplied by the coal constant feeder to minimize generation of dust from the coal input onto the upward surface of the first transfer plate.