... consisted of hot-air stove,screw feeder,buffer air pipe blower and cyclone. Negative pressure. QHG Air-flow Drier ... of the first drier.The drier is consisted of hot-wind stove (ready by customer), screw feeder, buffer ... pipes and cyclThe work process is that the air flow is formed through the negative pressure of ... pipe through the screw feeder, so that the hot wind and materials mix together, and the ...