The flash dryer uses hot air to exert strong shear, blowing and rotating forces on the material, through which the material is micronized, thus greatly improving the efficiency of mass and heat transfer. The material is fed into the dryer by the screw feeder, and under the action of the high-speed rotating agitator, the material undergoes impact, friction and shear processes to achieve rapid dispersion. The lumpy material is quickly crushed, thoroughly mixed with hot air, heated and dried. Subsequently, the dewatered dry powder rises with the hot air flow, and the grading ring effectively intercepts the large particles, while the small particles are smoothly discharged from the center of the ring outside the dryer.
The cyclone is responsible for incomplete drying or bulky materials, which are thrown against the wall under the action of centrifugal force and fall back to the bottom for crushing and drying again. Finally, the dried material is brought into the dust collection system by the air flow for centralized treatment, which fully meets the environmental protection standards, and the exhaust gas is discharged by the induced draft fan, and the whole drying process is efficient and environmentally friendly.
The belt dryer is a continuous drying equipment, especially suitable for the drying of sheets, strips and granular materials with good air permeability. It consists of a number of independent units connected in series, each equipped with an independent inlet, outlet, transmission and tensioning device. The wet material is continuously fed into the dryer through the feed port, and after the gradual drying of multiple units in turn, it is finally discharged continuously from the discharge port. The drying effect of each unit can be precisely controlled by adjusting its operating parameters to ensure that the material reaches the ideal drying state.
In general, flash dryers and belt dryers have their own unique advantages and application scenarios, and it is impossible to simply judge which one has higher drying efficiency. In practice, the best decision should be made based on the specific characteristics of the material and the drying requirements.