PRINCIPLE OF WORK
The principle of work is shown in Fig. The raw material to be treated should be distributed on the conveyer screen belt. The screen belt is made from 12-60 mesh of stainless steel wire. It will be moved inside the drier through driving apparatus. The dry section consists of several units, each unit uses hot air circle separately. In which, parts of tail air are discharged through fan 6. The discharged air amount is controlled through regulation valve 7. At upper circle unit, air from circle fan 5 enters into the low chamber of unit through side duct. Air stream to be heated is up forward through heat exchanger 4 and then is distributed through distributor 3 and finally is injected to the screen belt and is penetrated to raw material and entered into upper chamber. The dry process is a conduction process of heat and mass when hot air passes through the layer of raw material.
