PLANT FOR SOLUTION, SUSPENSION AND SPREADS DRYING Russian patent published in 2008 - IPC F26B3/12 

FIELD: heating.

SUBSTANCE: plant for solution, suspension and spread drying includes drying chamber with oscillating granulator locating in the central part, and spraying chamber is located in the upper part of its housing. Spraying chamber is provided with injectors and coolant supply header. Plant is also equipped with solution supply system and spent coolant cleaning system. Gas-distributing system is equipped with two gas-distributing units: upper and lower. Upper gas-distributing unit supplies coolant to spray cone and is intended for even coolant distribution along sprayed material cone. Lower gas-distributing unit supplies coolant to bottom part of housing where gas-distributing lattice with nozzles for secondary coolant supply and discharge hopper for granules is installed. Oscillating granulator is represented as swirling flow with meshed bottom. Injector contains housing with chamber where screw with the external threaded groove is located. Besides, bottom of housing is provided with throttling opening. Choke with cylindrical opening is in the top of housing. Threaded opening is available inside screw and agitating chamber is situated under the screw. Agitating chamber consists of cylindrical and tapered parts. Screw is rigidly linked with T-shaped throttle plate, where at least three throttling openings are made in its end cylindrical part. Axial throttling opening is available in axial cylindrical part rigidly connected to end cylindrical part. In addition, hydraulic resistance of throttling openings is selected in dependence on properties of sprayed liquid and required rate of dispersion.

EFFECT: improvement of drying efficiency.

4 cl, 3 dwg