Method and apparatus for conveying material and ejector apparatus

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.