Vacuum belt dryer is a new type of drying equipment developed in China in recent years. It is widely used in extracts of most natural botanical drugs, especially suitable for drugs with high viscosity, easy agglomeration, thermoplasticity, and heat sensitivity or not The spray drying method can be used for continuous feeding and continuous discharging. The whole process of feeding, drying and discharging is sealed and carried out under high vacuum, without contact with the external environment, and meets GMP requirements.
Working principle of vacuum belt dryer
The material to be dried is sent into the vacuum chamber of the dryer through a screw metering pump, and is evenly shoaled on a conveyor belt by a distribution motor. The motor-driven special roller drives the conveyor belt and runs at the set speed. Below the conveyor belt, there are independent heating plates and a set of cooling plates. The conveyor belt is closely attached to the heating plates and the cooling plates, and the heat required for drying is transferred to the materials and cooled in a contact heat transfer manner. The speed of the conveyor is set according to the nature of the material. When the material is transported from one end of the barrel to the other by the conveyor, the material has been dried and cooled. When the conveyor belt is folded back, the dried cake is peeled from the conveyor belt. After being pulverized by the pulverizing device, the granules obtained through the butterfly valve airlock can be directly made into capsules or tablets.
Vacuum belt dryer (VBD) is mainly used in drying many kinds of solid, liquid or paste raw material, such as traditional & western medicines, food, biological products, chemical material,
health foods, food additive etc, especially suitable for drying material with high-viscosity, easy agglomeration, or thermoplastic, thermal sensitivity, or material that can not be dried by traditional dryer.
For above materials, VBD is the best choice:
Pharmaceutical industry:chinese medicine extract, plant extract, egg embryo, PVPK series, fermenting liquid etc
Food industry:instant coffee, malt extract, carbohydrate, instant beverage, tea powder, cocoa powder, corn paste etc
Chemical Industry:lithium battery, emamectin benzoate etc.
1. Main body structure is stainless steel sealing container, work continuously, feed material continuously, discharging continuously.
2. The unit heating source adopts hot water and pressured hot water, equipped with water cooling system. Heating source adopts steam and electric heating ways.
3. The charging amount can fine-tuning and auto control, even if in the condition of charging amount is so less, the coating device can coating uniformly, so as to optimizing drying technology;
every belt is equipped with solely screw pump as the feed pump.
4. The belts are imported Teflon belt, resist stick, resist chemical products, resist temperature from -70 ℃~260 ℃.
5. Due to the thermal sensitivity of natural medicine, adopts low temperature drying way, in the drying process the products temperature are generally at 40 ℃~50 ℃.
6. Vacuum belt type dryer adopts PLC control, through the PC man computer interface to operate the equipment, meanwhile in the discharge area and nearby of dryer set the operation panel
to operate in the work area. It can auto run and also can manual operation.
7. The unit has reasonable temperature measured point, and measured the temperature in time and reliable, and auto control the operation parameters.
8. The terminal outlet use the pneumatic vacuum butterfly valve blocked the vacuum then continuous drain out the drying material.
9. The discharge outlet has the function of smash and pelleting the dry power granular size can accord to the customer's requirement to set.
10. The unit equips the high pressure water cleaning device.
11. Vacuum auto belt type dryer are widely usage, and drying all kind of natural medicine extracts, include the thermoplastic products (polysaccharide, colloid, lipid ingredient, etc)
and other difficult dried products.
12. Vacuum belt type drying has the belt tension device (can set the tension) and correct errors device prevent the belt run deviation.