Ultrafine powder dryer is developed on the basis of rotary flash dryer. It is a multi-function drying machine that integrates drying, crushing and grading. It is professionally used for ultra-fine and nano-scale materials with strict particle size requirements. dry.
Rotary flash dryer is a kind of drying method of solid fluidization. Drying machine has functions of mechanical dispersion and dry material size adjustment and high moisture content paste paste. After the filter cake-like material enters into the dryer, it is mixed with hot air. The material forms granular fluidization under the action of hot air and mechanical dispersing force. Instant exchange of heat and mass is completed. The dried material enters the collector to obtain a powdery product.
The difference between ultra-fine powder dryer and flash dryer
1 structural difference
(1) Ultra-fine powder dryer The stirring and crushing device has a rotating speed of several thousand revolutions, while the flashing machine has only a few hundred revolutions. Therefore, the ultrafine powder drier has an unparalleled crushing ability of the rotary flash drier.
(2) The inlet direction of the flash dryer is tangential air inlet. The rotating wind speed in the drying section is determined by the inlet air speed. It is always an indefinite value, and the rotating air speed of the ultrafine powder dryer is high-speed rotation. The rotating wind speed of the power is free from system interference, thus ensuring reliable production and stable product quality.
(3) The feeding device of the ultrafine powder dryer is a unique double helix structure, and the material feeding is smooth: The continuously variable transmission is a new type, which ensures the reliability of working at a very low speed. The feeding device on the flasher is different from this unit.
(4) The grading device of the ultrafine powder dryer is a rotating device with an adjustable rotation speed, while the grading device of the flasher is actually only a grading ring. Although the rotary flash dryer has also been improved, the grading ability is not as good as Ultrafine powder dryer.
2 differences in performance
(1) Ultrafine powder dryers have better control of moisture content and fineness of dry materials than flash dryers. The fineness of the flash dryer material can only reach a certain degree and cannot be further controlled.
(2) Since the ultrafine powder dryer has a much better comminution function than the flasher, the output is larger than that of the flasher and the product size is finer.
(3) The thermal efficiency of ultra-fine powder dryers is significantly higher than that of flash evaporators, so energy savings are significant.
3 comprehensive comparison of dryness effect
The advantages of using ultrafine powder dryers are:
(1) The model is small and the floor space is small: the supporting devices are small (such as fans, dust collectors, etc.).
(2) Low power consumption, energy saving: Only 1000 Kcal is needed for evaporating 1 kg of water on the ultra-fine powder dryer, and 1500 Kcal for every 1 kg of water evaporated on the flash dryer. .
(3) Large output and fine products.