SPRAY DRIER OF BOILING BED WITH PASSIVE HEAD PIECE Russian patent published in 2009 - IPC F26B3/12 

FIELD: heating; drying.

SUBSTANCE: present invention pertains to technology of drying particulates in boiling bed and can be used in anilino-painting, food, pharmaceutical, microbiological, chemical and other industries. Spray drier of a boiling bed with passive head piece consists of drying chamber with gas-distributing array, vibrating plates of vibration mechanism, fitted in the drier case with provision for rotating about an axis, and sprayer. The drier is distinguished by that, extra plates of varying lengths are rigidly fixed on the vibrating plates chequerwise at an angle ranging from 80° to 40° to the vibrating plates. Free peaks of the extra plates on the right side vibration plate face upwards, while those on the left side vibration plates face downwards. In the bottom part of the case there is trapping system, comprising an acoustic device for agglomeration of small particles, cyclone collector and bag filter with storage bin. The sprayer is acoustic and comprises case with nozzle ultrasonic generator inside it, as well as ring shaped cavity resonator. The case is in form of vertical cylinder bushing, in the upper part of which there is pipe for feeding in air, and perpendicular to its axis, there is pipe for feeding in liquid. Inside the case, in line with it, bushing is rigidly fixed with upper and lower flanges. The lower flange is rigidly fixed in groove on the case, and inside the bushing, in line with it, there is ring shaped cavity resonator in form of cup with conical surface. The cup is pressed on to beam with diameter d, equal to the diameter of the resonator, and in its tail end, there are locking disks, which are in the form of elastic blades, touching the inner surface of the bushing. In the lower flange there is at least one nozzle at an angle 20°÷40° to the axis of the resonator. The extension of axis of the nozzle lies on circumference located in the middle part of the conical surface, and on the inner surface of the bushing, there are in-line tapered and cylindrical openings.

EFFECT: increased efficiency of drying.

8 cl, 5 dwg