DRYING COATING LAYER WITH INERT FITTINGS Russian patent published in 2018 - IPC F26B17/10 

FIELD: technological processes.

SUBSTANCE: invention relates to the technology of drying disperse materials in a fluidized bed and can 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, additionally contains inert bodies and a baffle for cleaning inert bodies, made in the form of a perforated lattice fixed in the place of transition of the cylindrical part of the body into a conical part, and on the lateral surface of the conical part of the body there are at least two nozzles 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 apparatus is also equipped with pneumatic acoustic nozzles inserted into the nozzles for the high-temperature coolant, the nozzles being enclosed in a cooling jacket, and for discharging the dried granules in the grate, a calibrated hole is provided, and in the lower part of the body 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, wherein the space of the cavity resonator is spaced apart from the nozzle section at a distance b, and the air supply pipe is perpendicular to the axis of the housing and is connected to an annular cavity formed by the roller and the housing inner surface, while on the roller a cage with throttling holes is fixed coaxial with the annular 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 a gland that is mounted on the free end of the roller, and the ratio of the length h of the annular cavity resonator to the distance b from the open surface of the cavity of the cavity resonator to the nozzle section lies in the optimal range of values h/b = 0.7÷1.3; the 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: d_p/d_st.=1.2÷1.9; the 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: d_s/d_st=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 fastening element of the annular cavity resonator with the resonator rod in such a way that the output sections of the external and internal diffusers lie in one plane perpendicular to the axis of the annular volume resonator.

EFFECT: increase in drying performance.

1 cl, 2 dwg