FIELD: technological processes.
SUBSTANCE: invention relates to the technology of drying disperse materials in a fluidized bed and may be used in aniline, food, pharmaceutical, microbiological, food, chemical and other industries. This is achieved by the fact that a fluidized bed drier with an inert packing comprising a housing consisting of a cylindrical and conical parts in which a gas distribution grid and a solution and coolant supply system are located, in addition, it comprises inert bodies and a baffle for cleaning inert bodies in the form of a perforated grille fixed at the junction of the cylindrical body part into a conical part and at least two nozzles are arranged on the lateral surface of the conical part of the body, in which a high-temperature coolant is supplied, and they are installed tangentially to the body and create a rotating flow of inert bodies, the gas distribution grille comprises pneumatic acoustic nozzles inserted into the nozzles into which a high-temperature coolant is supplied, and the cover of the device is also equipped with pneumatic acoustic nozzles inserted in the nozzles for high-temperature coolant, the nozzles being enclosed in the cooling jacket and a calibrated opening is provided for discharging the dried granules in the grate, and in the lower part of the housing there is a catchment system including an acoustic installation, where there is an acoustic agglomeration of fine particles, a cyclone and a baghouse filter with a hopper, wherein the acoustic nozzle is made in the form of a housing with an acoustic oscillation generator housed inside the nozzle and resonator, nozzles for supplying air and liquid, the acoustic oscillation generator is made in the form of a conical nozzle coaxial with the housing and having an annular throttle opening with an external diameter dc formed by the cut of the nozzle and a resonator rod of diameter dst, and an annular volumetric resonator of length h, formed by a resonator rod and a cylindrical cavity with an outer diameter dp in the fastener, the cavity of the cavity resonator is separated from the cut of the nozzle at a distance b, and the nozzle for air supply is perpendicular to the axis of the housing and is connected to the annular cavity formed by the roller and the inner surface of the housing, while the roller is secured with a cage with throttling holes coaxial with the ring throttle opening, and the resonant rod is coaxially fixed, and the sprayed liquid is fed through a pipe located perpendicular to the axis of the housing into the annular cavity formed by the casing and the outer surface of the nozzle, one end of the casing being made solid and connected to the casing, and in the other end, which encloses the conical nozzle, throttling openings are made coaxial with the ring throttle opening, while on the side opposite to the cavity resonator, there is provided an adjusting device in the form of a handwheel with an oil seal, which is set at the free end of the roller, and the ratio of the length h of the annular volume resonator to the distance b from the open surface of the cavity of the resonating chamber to the nozzle cut lies in the optimal range of values h/b = 0.7÷1.3; ratio of the outer diameter dp of the annular cavity resonator to the diameter dst of the outer cylindrical surface of the resonator rod lies in the optimal range of values: dp/dst=1.2÷1.9; ratio of the diameter dc of the ring throttle opening of the nozzle to the diameter dst of the outer cylindrical surface of the resonator rod lies in the optimum range of values: dc/dst=1.1÷1.7, and an outer diffuser is coaxially attached to the nozzle shell, and an internal perforated diffuser is coaxially attached to the annular cavity resonator fastening element with the resonator rod so, that output sections of external and internal diffusers lie in one plane perpendicular to annular volume resonator axis.
EFFECT: increase in drying performance.
1 cl, 2 dwg
