Principle of operation
The drying process of closed circulating fluidized bed drying system is similar to that of open fluidized bed drying system. Because the material to be treated contains organic solvents such as methanol, ethanol, toluene, DMF, etc., the system adopts the process of drying tail gas to bring out moisture, then condensing, emptying a small part, recycling most of it to the air inlet for heating, and then fluidized drying.
Performance characteristics
Compared with the open fluidized bed drying system, the closed circulating fluidized bed drying system has the following remarkable characteristics:
◎ High thermal efficiency.
◎ The adjustment range of drying time is large, which can realize the extremely low control of final moisture content.
◎ The solvent can be recovered, which has good economic benefits and conforms to the green circular economy.
◎ The tail gas is condensed and then discharged, so the environmental protection pressure of tail gas treatment is low.
◎ The whole system needs to be explosion-proof.
Applied range
Widely used in the drying of easily oxidizable materials, and the drying of powdery, uniform and small-particle materials containing organic solvents.
