The invention discloses a hot-
air drying machine capable of utilizing
waste heat and achieving penetrating countercurrent
fluidization. The upper portion of a
drying tower is connected with an induced draft fan, and the induced draft fan is connected with a
cyclone dust removing
waste heat efficient recoverer formed by a tube-type
heat exchanger and a
cyclone dust collector in an overlapped manner in the tangent direction and then is emptied; the air inlet end of the shell side of the tube-type
heat exchanger is communicated with the
atmosphere, and the air outlet end of the shell side of the tube-type
heat exchanger is connected with the lower portion of the
drying tower through an
air blower and a steam finned heater; and an
impeller of the induced draft fan is of a structure that blades are in a hollow and wedged shape, and the
contour line of the appearance of the induced draft fan is an
involute. According to the hot-
air drying machine capable of utilizing the
waste heat and achieving the penetrating countercurrent
fluidization, creative integration is conducted on waste heat utilization and dust removal, the
cyclone dust removing waste heat efficient recoverer is designed out, the equipment input is reduced, and the work efficiency is improved; and due to the fact that
sieve mesh cone covers,
sieve mesh cone discs, discharging tubes, a stretching
vibration transmission shaft and conical plugs are arranged, penetrating, countercurrent, boiling and
fluidization drying of materials are exquisitely and perfectly achieved, more energy is saved, the drying quality is higher, the
power consumption of the induced draft fan is lower, and the application prospect is wider.