Principle
The air steam passes through the surface of raw material only in treditional level chamber drier. The disadvantage is that the coefficient of raw material on]y in traditional level chamber drier. The disadvantage is that the coefficient of heat transfer is low and the defect of structure, it can not be in conformity with the requirements of "GMP". In order to overcome the shortcoming, we designed 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 filtered through primary, secondary and high efficiency. Therefore the purification reacone hundred thousand grades. Through steam heat exchanger, the temperature of air is raised to air is raised to certain temperature. The heated air is an 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 ever damp air is sucked from the inclined air channel under the drying tray. Parts of damp air are exhausted of out off the oven through centrifuge the other is circled and heated still. In this way the purpose can be realized.

Features
Each circulation of hot air is passed through primary and high effective filters. Therefore it can control effectively the raw materials brought by air to destroy during the period of re-circulation and reheat and polluting the medicines. It is in conformity with the requirements of GMP fully.
Compared with traditional horizontal box type dryer, its capacity of drying is alrger. The thickness of law materials on the drying layer can be over three times.
Compared with traditional horizontal box type dryer, its drying area is large and its efficiency is high. Its capacity of drying can raise 3~6 times. Its cost is cheaper.
Suitable for drying all kinds of granules such as, granule, block of law materials.
Easy in operation, convenient in parts exchanging, low in trouble.
There are air filters at air inlet and air outlet. Therefore the dried raw materials can not be polluted and the quality of product can not be effected too.
The hot source can adapt steam, oil or electric heater.

Technical Parameters