The flash drying system is used to dry particulate solids during transportation in a hot gas stream (usually air or combustion gas). A simple fast drying system includes six basic components: gas heater, wet material feeder, drying tube, separator, exhaust fan and dry product collector. Sometimes a special mixing device is used to send wet particles into the hot air flow, which flows upward along the drying tube.

  Four factors that affect the production of flash dryers: material shape, material moisture content, medium temperature, wind speed/wind pressure. 

  Rapid drying uses heated gas to pneumatically transport the feed to the flash tube and into the main air separation unit, usually a cyclone. The air is induced or forced into the feed area by the hot gas generator, where it entrains the feed and flashes off the moisture during transportation. The product is fed into the throat of the feed area of the flash dryer in a controlled manner. The particle speed is about 80% of the conveying speed, and fine products require secondary dust collection, such as multi-layer, bag filter, scrubber and electrostatic precipitator.

  The gas velocity must be greater than the free falling velocity of the large particles to be dried. The gas velocity relative to the particle velocity is very high. The thermal contact between the conveying air and the solid as described above is usually very short, so the flash dryer is suitable for removing the outside moisture (surface moisture) and not suitable for removing internal moisture. At the end of the drying process, install a dust separation device.

  It must comply with pollution control regulations. For this, cyclones, fabric filters, electrostatic precipitators, wet scrubbers, and fabric filters can be selected. Flash dryers are used in various fields of chemical, pharmaceutical, ceramics, gypsum, wood and mining industries. The flash dryer has a simple structure, low investment cost and almost no failures.

  Zhengzhou Jiutian is a manufacturer specializing in the production and sales of flash dryers. If you need it, please feel free to contact us.