The vacuum belt dryer is a contact type vacuum drying device with continuous feeding and continuous discharging. The liquid to be dried directly enters the interior of the dryer under high vacuum through the conveying mechanism, and several pieces are spread in the dryer. On the drying belt, a special rubber roller driven by the motor drives the drying belt to move along the direction of the dryer cylinder at a set speed. Each of the drying belts is provided with three independent heating plates and a cooling plate, and the drying belt is provided. The heating plate and the cooling plate are closely fitted to transfer the energy required for drying to the material in contact with heat transfer.
When the drying belt moves from one end of the cylinder to the other end, the material has been dried and cooled, and when the drying belt is folded back, the dried cake is peeled off from the drying belt, and is broken down by a lifting device that moves up and down. In the device, the pulverized material is discharged through two air-glot type discharge hoppers. Since the material is directly dried under a high vacuum for a period of time (usually 30-60 minutes), the particles obtained after drying have a certain degree of crystallization effect, and at the same time, there are micropores inside from the microscopic structure.
After directly pulverizing to the required particle size, the flowability of the particles is very good, and it can be directly compressed or filled with a capsule, and at the same time, since the particles have a microscopic loose structure, the fast solubility is excellent. Moreover, the appearance of the granules is good, and for the instant (granules) products, the grade of the products can be greatly improved.
The vacuum belt dryer continuously feeds and continuously discharges at both ends of the fuselage, and the batching and discharging parts can be set in the clean room. The whole drying process is completely closed, and does not contact with the external environment, and meets the requirements of GMP.
Vacuum belt dryers are suitable for a wide range of applications and are suitable for most natural product extracts. Especially for materials with high viscosity, easy agglomeration, thermoplasticity and heat sensitivity, it is not suitable or can not be spray dried. Belt vacuum dryer is the best choice. Moreover, the concentrated extract can be directly sent to the belt dryer for drying without adding any auxiliary materials, which can reduce the dosage of the final product and improve the product grade. During the whole drying process, the product is in a vacuum, closed environment, and the drying process is mild (product temperature 40-60 ° C). For natural extract products, it can maintain its color, fragrance and taste to the maximum extent and obtain high quality final products. The vacuum belt dryer can perform full CIP in-place cleaning. CIP can be cleaned in place between batch and batch, product and product, making it very convenient to replace the product, greatly reducing the labor intensity of workers. Guarantee the quality of the product.
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