The damp raw material enters into helix bed from inlet at the top and along with the helix ced from up low and make jumping mot ion to the bottom and then discharge under the action of vibrating force at the circle and gravity .Meanwhile clean hot air enters into it from the bottom of helix bed and carries out heat exchange with raw material on the helix bed fully and exhausts from and outlet at the top .In this way the dry purpose of damp raw is reached . ]

Because the hot air passes through the layer of raw material several thimes and acts counter motion toward the raw material ,the heat exchanges is fully used and thermal efficiency is high.

The structure is compact and it occupies smThall area The star time of raw material in thehelix bed ca be adjusted and the operation is very convenient

The raw material acts the motion of circle at helix bed from up to low ,at the same time the equipment can jump itself ,so the contact surface between hot air and raw meterial is increased too and the dry effects is strengthrned .

The equipment is suitable for continuous operation because of continuous feeds and discharging raw material .Meanwhile it is easy to meet the requirements of "GMP"

it dose not damge the surface and shape of raw material basically ,it can not only maintain the roundness of pill but also decrease the broken rate of pill.