A flash dryer is a system in which a wet powder is introduced into a hot stream of air. Usually this is done by throwing the wet material into a very high-speed airflow in a venturi using a mechanical disperser. The powder has a large surface area surrounded by hot air. Since the powder is wet, the hot air can easily evaporate the water at the particle surface, simultaneously cooling the air down and carrying the water vapour away in the air stream.
The rapid evaporation which takes place in the venturi of the dryer is called flashing, hence the name “Flash Dryer”. In fact, most of the water is evaporated in this short section until the powder surface has no free water. The remaining moisture must diffuse through the inside of the particles, and this takes more time. So, the last part of the drying takes much longer than the initial flashing. The moisture content in the final product can vary from 0% to as high as 12%, influenced by the operating parameters or the amount of residual moisture present in the product. So, it’s an effective industrial solution to extract moisture from wet substances.
Therefore, Zhengzhou Dingli has focused on flash drying for more than 20 years and has rich R&D and production experience. It can customize products according to your processing volume to solve your production needs. Welcome to inquire and get a quote.
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