Pneumatic conveying feeder and transfer pipe connecting structure

Disclosed is a pneumatic conveying feeder, comprising a middle circular cylinder (2), an upper flange (1), a lower flange (4), an impeller (3) and a transmission device. By means of arranging at least two feed inlets (14) on the upper flange (1), making the number of feed outlets (41) the same as the number of feed inlets (14) and arranging the feed outlets (41) and the feed inlets (14) in a staggered manner, the invention realises an increase in space utilization rate of the device, so as to increase the feeding ability of a single device. By means of arranging a groove-shaped air distribution cavity (12) at the positions of a lower surface of the upper flange (4) corresponding to each feed outlet (41), the invention changes the blowing method, so as to increase the blowing ability and blowing concentration of a single device with the same diameter with regard to materials, and reduce operating costs of the device. Further disclosed is a transfer pipe connecting structure, which, by means of changing the connection relationship between transfer pipelines, while ensuring the flow precision for blowing materials, can not only realise a feeder blowing a reactor in a traditional manner, but can also realise a feeder blowing two reactors, thereby saving on costs for a user.