Patent ID: 7896584
Filing Date: 2011-03-01
Classification: B01D,B65G,F04F

Abstract:
1. An apparatus for the food industry which conveys bulk material by the application of a pressure difference in a conveying conduit ( 4 ), said apparatus comprising a material conveying conduit ( 4 ), a separating device ( 5 ) and means for creating a negative pressure in the conveying conduit ( 4 ) by using an ejector apparatus ( 6 ), having a suction side that is connected to the separating device ( 5 ), said ejector apparatus being operated by an operating medium, said ejector apparatus ( 6 ) comprising at least one nozzle ( 121 , 122 ) for spraying a liquid mist and for using the liquid mist as the operating medium of the ejector and means ( 125 , 126 , 127 , 131 ) for supplying a liquid to the nozzle, said at least one ejector nozzle ( 122 ) arranged in or near an ejector tube ( 128 ), or near an ejector tube inlet, the outlet of said at least one ejector nozzle and said ejector tube being directed towards a separating element ( 38 ) and extending into the separating element ( 38 ), wherein the apparatus comprises means for enhancing the negative pressure to be produced according to need by limiting the flow of gases including air, into the ejector tube ( 128 ) from a distal end of said ejector tube ( 129 ) relative to the spraying direction of the operating medium defined by the outlet end of the ejector tube.