Patent ID: 6562109
Filing Date: 2003-05-13
Classification: B01D

Abstract:
Spin particle trap apparatus for separating powder particles from a powder-laden stream of flowing gas, comprising:a housing enclosing an upper chamber and a lower chamber and having an inlet opening positioned in the upper chamber for directing the stream of flowing gas out of the upper chamber without flowing through the lower chamber; an impeller positioned in the upper chamber between the inlet opening and an outlet opening, said impeller being powered by a motor to spin and thereby impart sufficient additional kinetic energy to powder particles in the powder laden stream of flowing gas to separate the powder particles from the stream of flowing gas before the stream of flowing gas flows through the outlet opening, wherein the motor is positioned outside the upper chamber and is magnetically coupled to the impeller in a manner that applies rotational torque of the motor to spin the impeller in the upper chamber, and with said lower chamber being positioned under and open to the upper chamber such that powder particles separated from the stream of flowing gas can fall by gravity from the upper chamber into the lower chamber; and an inverted frustoconical-shaped chute with a top end and a bottom end, the chute being positioned inside the housing below the impeller and separating the upper chamber from the lower chamber, the top end of the chute including an opening that is larger in diameter than the impeller and the bottom end of the chute including an opening that is smaller in diameter than the opening at the top end of the chute.