The flash dryer carries out strong shearing, blowing and rotating action on the material through hot air, so that the material is micronized by centrifugation, shearing and collision friction, and strengthens the mass and heat transfer. The material enters the dryer by the screw feeder, and under the strong action of the high-speed rotary agitator, the material is dispersed under the action of impact, friction and shear, and the block material is quickly crushed, fully contacted with hot air, heated and dried. After dehydration, the dry powder rises with the hot gas, the grading ring intercepts the large particles, and the small particles are discharged from the center of the ring outside the dryer, and the cyclone separator is not completely dried or the large material is thrown to the wall by centrifugal force, and falls back to the bottom to be crushed and dried. The dried material is carried into the dust collection system by the air flow for collection and processing, which meets the requirements of environmental protection, and the exhaust gas is emptied by the induced draft fan to complete the whole drying process.
Belt dryer is a continuous drying equipment, which is suitable for the drying of sheet, strip and granular materials with good air permeability. The belt dryer consists of several individual units, each of which is equipped with an inlet, an outlet, a transmission and a tensioning device. The wet material enters the dryer through the inlet and is finally discharged from the discharge port after being dried by multiple units in the dryer. The drying effect of each unit can be controlled by adjusting its operating parameters.
From the perspective of working principle and operation mode, flash dryer and belt dryer have their own characteristics. Flash dryer is suitable for a variety of industries, such as dyes, pigments, chemicals, pesticides, fertilizers, feed, food, medicine, electronics, etc., its high efficiency and energy saving, fast, small equipment production, continuous operation characteristics make it have high drying efficiency in some fields. The belt dryer is suitable for the drying of sheet, strip and granular materials with good air permeability, and its continuous operation mode also has a high drying efficiency.
In actual use, it is necessary to select the appropriate drying equipment according to the characteristics of the material and the drying requirements. It is not easy to determine which of the drying efficiency of the flash dryer or the belt dryer is higher, and they may have their own advantages in different application scenarios.