Working principle:
The air steam passes through the surface of raw matirial only in traditional level chamber drier. The disadvantage is that the coefficient of heat transfer is Iow and the utilization factor is poor and the drying time so long.Moreover because of the defect of structure,it can not be in conformity with the requirements of "GMP" .In order to overcome the shortcoming,we edsigned and developed the penetrating air stream box type drier on the basis of absorbing abroad advanced technology. The principle of work is shown in the figure listed below:
The fresh air is sucked through fan and then filterd through primary ,secondary and high efficiency. Therefore the purification reaches to one hundred thousand grades .Through steam heat exchanger,the temperature of air is raised to certain temperature. The heated air is purified through filter again and then flows to every layer through left glow divider. It makes the hot air pass through the raw material to be dried evenly ,The damp air is sucked from the inclined air channel under the drying tray. Parts of damp air are exhausted out off the oven through centrifuge fan and the other is circled and heated still , In this way the purpose can be realized.