DEVICE FOR NO-CARRYOVER DRYING Russian patent published in 2013 - IPC F26B17/10 F26B3/12 B05B1/14 

FIELD: heating.

SUBSTANCE: in a device for no-carryover drying, comprising a loading device of moist material or solution, a drying chamber, a fan and a system of spent drying agent treatment, besides, the drying chamber comprises a cylindrical vessel, a porous shell installed coaxially in it, forming a free space for even passage of a drying agent inside the shell, besides, the shell material is made on the basis of aluminium-containing alloys with their further filling by titanium hydride or air with density within 0.5…0.9 kg/m³ with the following strength properties: compression strength within 5…10 MPa, bending strength within 10…20 MPa, and dry product is removed from a hopper via a gate lock, besides, for removal of the drying agent from the shell there is a rotary hollow porous cylinder, connected by means of a shaft with a drive, installed on the cover. Besides, the porous cylinder is made of a stiff porous material, for instance, foam aluminium or metal ceramics, or metal foam rubber with porosity extent within the range of optimal values: 30…45%. Supply of moist material or solution may be carried out by several sprayers, evenly arranged along the entire cross section of the shell, and the drying agent via the space under the upper cover leaves the device, at the outlet of which there is an acoustic plant installed for catching of medium-dispersed particles, connected with a cyclone connected to a discharge device. Optimal parameters for sound treatment in the acoustic plant with concentration of particles in the drying agent flow of at least 2 g/m³ are as follows: level of sound pressure in the range of 145…150 dB, frequency of oscillating process in the range of 900…1100 Hz, time of sounding in the range of 1.0…2 s, according to the invention, the body of each nozzle is made with a channel for supply of solution and comprises a coaxial rigidly coupled bushing, with a nozzle fixed on its lower part, made in the form of a cylindrical double-staged bushing, the upper cylindrical step of which is connected by means of a threaded connection with a central core, comprising a cylindrical part and a coaxial hollow cone installed with a circular gap relative to the inner surface of the cylindrical bushing, and the circular gap is connected at least with three radial channels, made in the double-stage bushing, connecting it with the circular cavity formed by the inner surface of the bushing and the outer surface of the upper cylindrical stage, besides, the circular cavity is connected to the channel of the body for supply of solution, and a sprayer is rigidly connected to the cone in its lower part with the help of a screw, and the sprayer is made in the form of an end round plate, edges of which are bent towards the circular gap between the nozzle and the hollow cone, at the same time on the side surface of the cone there are at least two rows of cylindrical throttling holes, with axes lying in planes perpendicular to the axis of the cone, and in each row there are at least three holes, besides, axes of throttling holes of one row are displaced relative to axes of throttling holes of the other row by an angle in the range of 15°÷60°.

EFFECT: improved efficiency of drying.

2 dwg