HEADWIND TYPE WIND SCREENING DEVICES

摘要

The present invention provides a screening device comprising: a first conveyor part for conveying input waste; a pivoting roller arranged at the lower side of the first conveyor part; a blowing fan arranged before the first conveyor part in an advance direction and installed in front of the pivoting roller; a second conveyor part arranged below the pivoting roller to discharge incombustible waste with a high specific gravity, which cannot be passed over the pivoting roller by the wind pressure and wind velocity of the blowing fan, by dropping and separating the incombustible waste using the conveyance inertia of the first conveyor; and a third conveyor arranged below the pivoting roller to drop, separate, discharge and selectively recover combustible waste with a low specific gravity over the pivoting roller using the wind power of the blowing fan. Small-sized light incombustible waste with a high specific gravity is prevented from being recovered in the recovery direction of combustible waste using the inertial force of the conveyor for supplying waste without being mixed with combustible waste by arranging the blowing fan in an opposite direction to the advance direction of supplied waste to supply wind power. Therefore, the wind-powered screening device using an adverse wind can screen waste into combustible waste and incombustible waste correctly by gravity irrespective of size.