The fluidized surface dryer is a new type of high-efficiency dry milling device developed and developed by the Institute of Drying Technology of Southeast University. It combines the advantages of drying, boiling drying and film drying, and solves the problem of drying high viscosity, heat sensitive solution, suspension or syrup material. The machine is advanced in design, reasonable in structure, has been tested in production for decades, and has been promoted and applied in many industries in China. The national patent of this technology (85200130), the fourth prize of the national invention in 1990!

Fluidized surface dryer (drying equipment) working principle:

The high temperature air causes the inert carrier in the dryer to be in a fluidized state. If the material is fed into the nozzle, it is evenly attached to the surface of the inert carrier after being atomized. The film material sprayed on the surface of the inert carrier is internally subjected to the heat conduction of the relatively warm inert carrier, and the outside is strongly convected by the fluidizing gas to rapidly evaporate and dry the water, and is ground into a powdery product by an inert carrier. . The carrier separator mounted at the top returns the inert carrier to the bottom, and the fine dry powder product is carried out of the drying chamber by the gas stream and enters the trapping system for trapping. The amount of wet material entering the drying chamber is steplessly adjusted by a speed control motor mounted on the feed pump. The drying process control parameters are the temperature inside the drying tower and the differential pressure.

Main features of fluidized surface dryer (drying equipment):

1. Applicability is strong. It is used for solutions, suspensions or syrupy materials with a solid content of less than 60%, and is dried to a qualified powdery product at one time.

2. Small size, small land occupation, low investment and high thermal efficiency. Due to the fluidization of the inert carrier and its own heat conduction effect, the heat transfer and mass transfer coefficient of the film material attached to the surface thereof are enhanced, so that the drying speed is fast, the production capacity is large, and the energy saving effect is remarkable. Compared with the spray dryer, the tower volume is 10 times smaller, the equipment investment cost is about 20% lower, and the thermal efficiency is about 10% higher. (drying equipment)

3, the drying speed is fast, and it is steamed and dried instantly. The entire process from wet to dry powder products is completed in only 1-5 seconds, which is especially suitable for heat sensitivity and drying of biological products.

4, no material sticking wall phenomenon, due to the fluidization of the inert carrier, ball milling, the material can not adhere to the drying tower wall, which is unmatched by spray drying.

5. The machine integrates drying and smashing into one, which simplifies the process flow, reduces the consumption of materials and reduces the labor intensity. (drying equipment)

6. Less wearing parts and simple maintenance. The machine uses a low-pressure screw-rod pump instead of the high-pressure pump required for pressure spray drying. The atomization uses a micro two-flow nozzle instead of the ultra-high-speed rotary atomizer used in centrifugal spray drying, making maintenance very simple and greatly reduced.

7. The dusty places in the system are all slightly negative pressure, which improves the working environment.