Chinese herbal medicine extract is refined from root, stem and leaves of plants, and contains high sugar which is easy melted at high temperature. Normal centrifugal spraying cannot meet these drying requirements, so we organized a group of technicians to develop such a dryer which specialize in Chinese herbal medicine extract through repeated calculations and many tests basis on our experience to make spraying dryer and collect advantages of same line of dryers from domestic and abroad.
Features
i. The diameter and height of tower have be modified, not only ensure that powder cannot reach at the wall of tower before drying, but also ensure that the powder will have enough dwelling time in hot air to complete low temperature drying. The wall of tower has sandwich cooling device to ensure liquid materials not to be softened, melt or coked when hey are stuck on the wall that has partial high-temperature. There is air shocker on the cone body which has larger and can pulsate the tube by compressed air to shake down powder which is stuck on the tube.
ii. All contact place inside the dryer have plain or round surface, and are ground and polished (fine polish over 10) to avoid sand hole and dead angle… The contact surface is made of stainless steel to ensure material free of pollution. The driving parts have good sealing to prevent water and oil. Material discharge is done by sealed butterfly valve to avoid air leaking. Discharge pipes are connected flexibly for easy dismantling in order.
iii. Three-stage air filters are used on air pre-treatment system and air can be purified up to 100 thousand level.
iv. PLC program control system circuit is used and cartoons of contact screen displays technological process. Variable data carries out automatic trace and regulation by fuzzy technique, the atomizer is adjusted stably frequency converter, temperature of incoming air is adjusted by power-regulator, precision can teach plus and minus two so as to largely reduce energy consumption. Inlet and outlet temperature as well as pressure inside the tower can be set up precisely.
