Dual-airflow cyclone flash drying device

A dual-airflow cyclone flash drying device, comprising:

• a feeding device, a fluidizing cyclone generator and a drying cylinder;
• wherein the fluidizing cyclone generator is connected with the drying cylinder through a central connecting pipe;
• wherein a tail end of the feeding device is provided with a porous plate doser, wherein the porous plate doser is connected with the central connecting pipe;
• wherein the fluidizing cyclone generator comprises a housing with a lateral air inlet for supplying air, wherein in operation, air supplied from the lateral air inlet in the housing forms a cyclone to enter the central connecting pipe from a bottom of the central connecting pipe, the cyclone shears and breaks sludge entering the central connecting pipe into granules, and the granules are brought into the drying cylinder at a top of the central connecting pipe along with the cyclone;
• wherein a drying cyclone generator is arranged at a lower portion of the drying cylinder, and comprises a lateral drying air inlet for supplying drying air, wherein in operation, drying air supplied from the lateral drying air inlet forms a drying air cyclone in the drying cyclone generator, said drying air spirally rises to make contact with the granules to evaporate moisture of the granules into water vapor;
• and
• wherein a particle size selector is arranged at an upper portion of the drying cylinder, and an outlet flue is arranged above the particle size selector.