(1) The ultrafine powder dryer's mixing and crushing device rotates at thousands of revolutions per minute, while the flash dryer only rotates at hundreds of revolutions per minute. Therefore, the ultrafine powder dryer has unparalleled crushing capabilities compared to the rotary flash dryer.
(2) The flash dryer uses tangential airflow, and the rotational air velocity within the drying section is determined by the airflow speed, resulting in a constantly changing value. In contrast, the ultrafine powder dryer's rotational air velocity is powered by a high-speed rotating crushing disc, unaffected by system interference, thus ensuring reliable production and stable product quality.
(3) The ultrafine powder dryer's feeding device features a unique double-helix structure, ensuring smooth feeding. The continuously variable transmission is new, guaranteeing reliable operation at extremely low speeds. The flash dryer's feeding device differs from this machine.
(4) The ultrafine powder dryer's grading device is a rotating device with adjustable speed, while the flash dryer's grading device is essentially just a grading ring. Although the rotary flash dryer has also been improved, its grading capability is still inferior to that of the ultrafine powder dryer. 2. Performance Differences
(1) The ultrafine powder dryer has better control over the moisture content and fineness of the dried material than the flash dryer. The fineness of the material in the flash dryer can only reach a certain level and cannot be further controlled.
(2) Because the ultrafine powder dryer's pulverizing function is much better than that of the flash dryer, its output is greater and the product particle size is finer.
(3) The ultrafine powder dryer has a significantly higher drying thermal efficiency than the flash dryer, resulting in significant energy savings.
3. Comprehensive Comparison of Drying Effects
The advantages of using an ultrafine powder dryer are:
(1) Small machine size and small footprint: Small supporting equipment (such as fans, dust collectors, etc.).
(2) Low power consumption and energy saving: The ultrafine powder dryer only requires 1000 kcal to evaporate 1 kg of water, while the flash dryer requires 1500 kcal to evaporate 1 kg of water.
