SPRAY DRYER WITH COUNTER SWIRLING FLOWS OF VHT TYPE Russian patent published in 2018 - IPC F26B17/10 

FIELD: technological processes.

SUBSTANCE: invention relates to drying of dispersed materials and can be used in microbiological, food, chemical and other industries. This is achieved in that in spray dryer with counter-swirling flows containing vertical chamber with feed system with heat transfer medium and with hopper for discharging the dried particulate material, feedstock feed system with heat carrier is made in form of axial inlet with swirler, fairing, baffle and ejection nozzle, on which primary flow of heat-transfer medium and raw material flowing through acoustic nozzle is fed. Secondary flow of heat-transfer medium enters through inlet with swirler, into which raw material is also fed through acoustic nozzle. Primary and secondary flows of coolant are preheated to required temperature by heaters installed on main pipeline line, and axial nozzle serves for discharge of spent coolant, dried material being supplied with primary, secondary, and also with both flows of coolant simultaneously through acoustic nozzles serving as feeder. Acoustic nozzle contains housing with internal acoustic oscillation generator in form of nozzle and resonator, nozzles for supplying air and liquid. Acoustic oscillation generator is made in form of conical nozzle coaxial with housing and having annular throttle opening with external diameter dc formed by nozzle cut and resonator rod of diameter dct and annular cavity resonator of length h formed by resonator rod and cylindrical cavity with external diameter dp in fastening member. Volume resonator cavity is separated from nozzle cut at distance b, and air supply pipe is perpendicular to housing axis and is connected to annular cavity formed by roller and inner surface of housing. On platen cage is fixed with throttling holes coaxial with ring throttle opening, and also resonator rod is coaxially fixed. Sprayed fluid is supplied through pipe, perpendicular to body axis, to ring cavity formed by housing and external surface of nozzle One end of housing is made solid and is connected to casing, and in other end, which encloses conical nozzle, are throttled openings coaxial with ring throttle opening, while on side, opposite to cavity resonator, there is provided adjusting device in form of handwheel with oil seal that is installed on roller free end. External diffuser is coaxially attached to nozzle casing, and inner perforated diffuser is coaxially attached to fastening element of annular cavity resonator with resonator rod, in such a way that output sections of external and internal diffusers lie in one plane perpendicular to annular volume resonator axis.

EFFECT: increasing drying performance.

1 cl, 2 dwg