Double cone vacuum dryer drying powder without cooling released

Does the subject want to ask "what happens when the drying powder of double cone vacuum dryer is released without cooling"? It will form air bubble powder. Double cone vacuum dryer drying powder without cooling out of the surface temperature is too low, the internal temperature is high, the internal part of the water is not easy to discharge, will cause bubble powder. Double cone rotary vacuum dryer working principle is in the closed sandwich passed into the thermal energy, heat through the inner shell to be dried materials.