Closed loop air flow dryer and its advantages

In order to prevent air pollution or recovery of dry materials by oxygen ratio and organic solvents, a closed-circuit air flow dryer was developed. Due to a series of characteristics of the drying technology, it is gradually concerned by people. At present, the drying technology has been widely used in food additives, biological products, resins and fine chemical products.

Closed loop air dryer

   in order to prevent air pollution or recovery of dry materials by oxygen ratio and organic solvents, a closed-circuit air flow dryer was developed. Due to a series of characteristics of the drying technology, it is gradually concerned by people. At present, the drying technology has been widely used in food additives, biological products, resins and fine chemical products.

What is a closed loop air dryer

   the so-called closed-circuit circulation air drying refers to the drying medium circulating operation in the drying system. The drying method was first put forward by grussman et al. At that time, he used superheated steam as drying medium and closed-circuit circulation to dry odorous materials. In closed-circuit air flow dryer, the drying medium used is not air, but superheated steam or inert gas (such as nitrogen). The main features of the dryer are as follows:

(1) The moisture in the material is divided into organic solvents, which can be recycled;

(2) The organic solvent contained in the material is not in contact with air, which can prevent combustion or explosion;

(3) In the process of food processing, it can prevent the oxidation of fat in products;

(4) It can prevent harmful bacteria from mixing in;

(5) If the material contains odor and toxic substances, it can prevent air pollution;

(6) High thermal efficiency.

The design method of nitrogen closed cycle air dryer is basically the same as that of conventional air dryer. The difference is that the physical parameters of air and water are replaced by nitrogen and organic solvent.