Rotary flash drying system

Abstract

The invention relates to a rotary flash drying system which is provided with an air filter, an air blower, an air heater, a rotary flash drying tower, a cyclone separator, a sack dust collector, an air preheater, a steam general supplying pipe and a steam general back pipe; the system preheats suction air through a plate-type heat exchanger by utilizing high-temperature tail gas through the system; an alluminum fin steam heat exchanger pipe with a high heat transfer coefficient is adopted for the air heater, and after the air surrounding the alluminum fin heat exchanging pipe positioned at a second unit is heated through the alluminum fin heat exchanging pipe of the second unit, the steam changes into high-temperature condensate water; the alluminum fin heat exchanging pipe of a first unit is heated by utilizing the high-temperature condensate water, the use amount of the fresh steam is reduced, steam consumption amount is estimated to be saved by about 5%-8%, and the system has an obvious energy saving effect; and the system is especially suitable for the drying of viscous materials.

Description

technical field [0001] The present invention relates to a spin flash drying system. Background technique [0002] The drying medium of flash drying generally adopts ambient air. After the ambient air passes through the air filter, it is blown into the steam heat exchanger, coal or fuel oil or gas hot air stove by the fan to be heated, and the heated hot air passes through the hot air of the flash evaporation host The distributor is distributed into a cyclone with uniform flow rate and flow direction. The cyclone contacts and collides with the wet material added by the screw feeder, and a series of physical changes such as mass heat exchange and separation begin, so that the material is separated from the moisture contained in it, and finally dried. Chinese Patent No. 92242824.7 utility model patent specification discloses a cyclone flash dryer, including a drying chamber and a cyclone separator, the heater is connected to the distributor, and a feeder is provided on the upp...

AI Technical Summary

Problems solved by technology

The cavity of the dryer can be cylindrical and hollow, with a classification plate inside. During the drying process of the above-mentioned spin flash dryer, the exhaust gas is directly discharged, and the heat medium is not fully utilized.

In addition, for the drying of viscous materials, for example, during the drying process of lithium iron phosphate as a battery material, the shape of the material changes greatly from liquid to paste to powder. At present, there is no drying equipment that is particularly suitable for lithium iron phosphate. The above-mentioned utility model Not suitable for drying of viscous materials

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