PNEUMATIC DRYER-CLASSIFIER Russian patent published in 2007 - IPC F26B17/10 

FIELD: chemical industry; food-processing industry; microbiological industry; devices for the pneumatic drying of the dispersed materials.

SUBSTANCE: the invention is pertaining to the devices for drying of the dispersed materials and may be used in microbiological industry, food-processing industry, chemical industry and other industries. The technical result of the invention is the increased efficiency of drying. The result is attained by the fact that the pneumatic dryer-classifier contains: the spiral channel, which is hermetically closed from above and from below accordingly by the cover and the bottom with formation of the vortex chamber; the loading and exhaust fitting pipes. The loading fitting pipe used for feeding through it of the damp product in the mixture with the air is tangentially disposed to the coils of the spiral(channel, which number lies in the optimal range from 4 up to 6, and the vortex chamber is rigidly connected and the coaxially located with it separation chamber with the overflow threshold. The separation chamber is rigidly fixed on the bottom of the vortex chamber, and the exhaust fitting pipe is disposed coaxially to the separation chamber and passes through the vortex chamber hermetically, that is not contacting it by the aerodynamic streams, and the separation chamber in its lower part has an unloading fitting pipe of the conical type, which axis is disposed at the acute angle to the vertical axis of the separation chamber. And inside the separation chamber - coaxially to it and to each other there are the similar to the separation chamber unloading pipes with the unloading fitting pipes of the conical type, which axes are disposed at the acute angles to the vertical axis of the separation chamber. At that the unloading pipes form in the bottom of the vortex chamber the overflow thresholds, and on the vortex chamber bottom there is the fixed vibrator, which optimal parameters for the vibration treatment are the vibration level in the range of 70... 85 dB, the frequency of vibrations - in the range of 31.5... 125 Hz, the time of action - 5 seconds with the interval of 30 seconds.

EFFECT: the invention ensures the increased efficiency of drying.

2 cl, 2 dwg