SWIRL CLASSIFIER OF POWDER MATERIALS Russian patent published in 2017 - IPC B07B7/08 

FIELD: power industry.

SUBSTANCE: vortex classifier of powder materials comprises a cylindrical straight-flow swirl chamber with classified material output channels in the form of annular slits, a chamber with coarse fraction output channels, each of the coarse fraction output channels is designed as a divergent nozzle of bimetallic material. Cam grooves are made on the inner surface of the divergent nozzle arranged longitudinally from the inlet to the outlet. One of the output valves of the classified material in the form of the annular slit and one of the coarse fraction output channels in the form of the divergent nozzle of bimetal with longitudinally arranged grooves on the inner surface are connected to the thermoelectric generator, made in the form of a housing with a pass for a hot flow of compressed air transporting the classified material and a pass for a cold flow of compressed air transporting the coarse fractions, as well as with a set of differential thermocouples, "hot" ends of which are located in the pass for the hot flow of compressed air, and their "cold" ends are located in the pass for the cold flow of compressed air. The cylindrical straight-flow swirl chamber is covered with fine fibre basalt material from the outer surface made in the form of extended beams longitudinally placed along the length of the cylindrical chamber. The "hot" and "cold" ends of differential thermocouples respectively located on the inner surfaces of the hot compressed air pass and cold compressed air pass are covered with a dielectric in the form of nano-type film of tantalum oxide.

EFFECT: increased efficiency of classifier perfomance, maintained quality of the finished product during long-term operation of the classifier.

4 dwg