SPRAYING DRIER Russian patent published in 2013 - IPC F26B15/06 F26B3/12 

FIELD: instrument making.

SUBSTANCE: spraying drier includes cylinder-conical drying chamber, cylindrical housing, conical cover plate and bottom, heat carrier supply air pipeline enclosing the drier housing on the outer side. Drag-type device with drive shaft is arranged at the bottom; outer side of the housing is provided with a duct with cyclones, the output of which is connected via air pipeline to the inlet of fans installed on the cover plate of drying chamber, and pressure lines of fans are connected by means of connection pipes to scrubber, in the upper part of which a header with atomisers is located and connected to supply pipeline and pressure pump; heat carrier is supplied from air heater via the line to the air duct to be further supplied to drying chamber. Drag-type device represents a lever with the centre connected to drive shaft and shoulders which are inclined and parallel to generatrixes of conical surface of the bottom. Drags made from the material that is inert in relation to the initial solution - suspension are rigidly attached to the lever arms, and the drying chamber bottom has an attached conical duct, in the lower part of which an additional drag-type device made in the form of a lever the centre of which is connected to drive shaft, is located; besides, its arms are horizontal and parallel to horizontal surface of conical duct bottom, in which finished product collecting bin is located, and vibrator is installed in lower part. Atomiser consists of cylindrical part with external thread for connection to the nozzle of distributing pipeline supplying the solution, suspension, conical transient part and cylindrical part with large size of diametrical section, and with internal threaded surface. A nozzle is fixed in lower part of housing coaxially to it; the nozzle is formed with cylindrical surface with external thread interacting with cylindrical part of housing. Besides, cylindrical surface of nozzle passes to conical surface and ends with an end blind partition perpendicular to the housing axis, with an orifice made in its centre, which is asymmetrical to the nozzle and consists of cylindrical and conical orifice holes connected in series. Larger diameter of conical hole is located on blind partition wall of the nozzle. Housing and nozzle form three internal cylindrical chambers that are coaxial to each other, and the nozzle, on the side that is opposite to the suspension solution supply, is provided with an additional row of orifices which are formed at least with three pairs of mutually perpendicular vertical channels for solution, suspension passage and horizontal channels, which cross on conical side surface of the nozzle and form outlet holes of each orifice; at that, pair channels are located at right angle to each other in longitudinal planes of the housing, and conical side surface of the nozzle is provided at an angle at the apex, which is equal to 90°.

EFFECT: improving the plant productivity by reducing the dried material sticking to drying chamber walls.

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