FIELD: technological processes.
SUBSTANCE: invention relates to drying dispersed materials and can be used in microbiological, food, chemical and other industries. Plant for drying solutions, suspensions and pasty materials comprises a casing with a spray chamber located in its upper part, equipped with a nozzle and a manifold for supplying a heat transfer medium, drying chamber with a vibrating granulator located in the central part and a gas distribution system of drying agent, solution supply system and exhaust air purification system. Gas distribution system is equipped with two gas distributors: upper and lower. Upper gas distributor brings the drying agent to the spray gun root and is designed to evenly distribute the coolant through the torch of the sprayed material, and the lower distributor allows the coolant to be introduced into the lower part of the body, where there is a gas distribution grid with connections for the supply of secondary coolant and charging chute for the exit of the pellets. In the central part of the body there is a vibratory granulator in the form of a vibrating tray with a mesh bottom with a perforation factor of 0.3…0.5, and elastically fixed to the bottom by means of springs of a perforated plate with a perforation factor of 0.5…0.7. Vibration drive has a control unit with which it changes the direction, amplitude and frequency of vibration in the required optimal range of parameters of the granulator: level of vibration in the range of 100…120 dB, oscillation frequency in the range of 50…100 Hz. Each of the nozzles contains a hollow cylindrical body connected to the nozzle, in which the nozzles are made in mutually perpendicular planes. Hollow body consists of a cylindrical part with an external thread for connecting a distribution pipe to the fitting, a liquid inlet, a conical transitional part and a cylindrical part with a large diameter section and an internal threaded surface, nozzle is fixed in lower part of housing coaxially to it; nozzle is formed with cylindrical surface with external thread interacting with cylindrical part of body. Cylindrical surface of the nozzle goes into a conical surface and closes end-face perpendicular to the axis of the housing with a hollow partition with a jet in its center, made with an axisymmetric nozzle and consisting of cylindrical and conical throttle openings connected in series, larger diameter of conical bore is located at atomizer blind web. Body and the nozzle form three coaxially interconnected internal cylindrical chambers, and on the nozzle from the side opposite to the liquid supply, an additional row of nozzles is made, which are formed by at least three pairs of mutually perpendicular vertical channels for the passage of fluid and horizontal channels that intersect on the conical side surface of the nozzle and form the outlet openings of each of the nozzles.
EFFECT: increased drying performance.
4 cl, 3 dwg
