Patent ID: 7785044

Claim:
Method for conveying material by applying a pressure difference in a conveying conduit ( 4 ), in which method the material is fed into the conveying conduit ( 4 ) and in the conveying conduit further into a separating device ( 5 ), where the material being conveyed is separated from conveying air, in which method a negative pressure is created in the conveying conduit ( 4 ) by means of an ejector apparatus ( 6 ), whose suction side is connected to the separating device ( 5 ), said ejector apparatus being operated using an operating medium consisting of a liquid mist, said medium being sprayed through at least one spraying nozzle ( 122 ) into an ejector tube ( 128 ) directed into a separating element ( 38 ), characterized in that the generation of the negative pressure to be produced is enhanced according to need by limiting the flow of gases into the ejector tube ( 128 ) from the direction opposite to the spraying direction of said operating medium defined by the outlet end ( 129 ) of the ejector tube.