Patent PH-12017501213-A1 (PH)
Title: Dust reduction apparatus depending on supply of falling coal in coal drying apparatus using reheat steam
Inventor: KIM SUNG KON
IPC: F26B25/00
Filed: 2017-06-29
Abstract: The present invention relates to a dust reduction apparatus which minimizes dust generation when coal is dropped and supplied from an upper dryer to a lower dryer in a multi-stage dryer for drying coal using reheat steam. The present invention relates to a coal drying apparatus 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 means of rotational force 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. In addition, the apparatus comprises: a first flattening device for uniformly dispersing and flattening a coal pile which is transferred after being dropped and inputted from the dust reducer onto the surface heading for the top of an upper first transfer plate; a first coal receiver which has a plurality of panels fixedly installed therein radially at a certain angle about a rotation axis between a pair of first driven sprockets; a second flattening device for uniformly dispersing and flattening the coal pile which is transferred after being dropped and inputted from the first coal dryer to the surface heading for the top of a lower first transfer plate through rotation of the first driven sprockets; a third flattening device for uniformly dispersing and flattening the coal pile which is transferred after being dropped and inputted from the first coal dryer to the surface heading for the top of an upper second transfer plate of the second coal dryer; a second coal receiver which has a plurality of panels installed therein radially at a certain angle about a rotation axis between a pair of second driven sprockets; and a fourth flattening device for uniformly dispersing and flattening the coal pile which is dropped and inputted from the second coal receiver to the surface heading for the top of a lower second transfer plate through rotation of the second driven sprockets, wherein the first coal receiver receives the coal pile dropped from the surface of the upper first transfer plate, is rotated according to the rotation of the first driven sprockets, and thereafter inputs the coal pile onto the surface of the lower first transfer plate to thereby inhibit dust, and the second coal receiver receives the coal pile dropped from the surface of the upper second transfer plate, is rotated according to the rotation of the second driven sprockets and thereafter inputs the coal pile onto the surface of the lower second transfer plate to thereby inhibit dust.