Vacuum Belt Dryer (VBD) technology has been put into large-scale production in the first line of well-known domestic pharmaceutical, food, and biological enterprises. The quality of equipment operation is stable, and the energy-saving effect is obvious.

The principle of a vacuum belt dryer is a low-temperature drying method by continuously coating liquid raw materials on the conveyor belt under vacuum conditions. The materials move through the heating zone with the conveyor belt to be dried, and then cooled and embrittled to obtain a low-temperature drying method. In the whole drying process, the extract is in a vacuum and closed environment, and the drying process is gentle (working temperature 30-145C), which can maintain its physical properties to the maximum and obtain high-quality final products.

As the material is directly dried under vacuum and gradually dried over a period of time, the dried particles have a certain degree of crystallization effect, and at the same time, there are micropores in the microstructure. After being directly crushed to the required granules, the granules have good fluidity and can be directly compressed or filled into capsules. The granules have good instant dissolution.

Vacuum belt dryer technology has a wide application range, and it can be used for most extracts. Especially for materials with high viscosity, easy solidification, thermoplasticity, and heat sensitivity, the use of vacuum belt drying can overcome the shortcomings of too fine and dense spray drying powder and high temperature. In addition, the operating speed of the vacuum belt drying conveyor belt, the thickness of the material, the temperature, and the vacuum degree of the environment—a series of parameters can be adjusted to suit the process requirements of different products. At this point, the belt vacuum dryer is far superior to the spray dryer

1 The use of digital integrated machine reporting technology realizes automatic detection and control in the dynamic vacuum drying process.

2 Adopting digital combined correction technology to overcome the problem of belt deviation during the vacuum drying process. The material belt conveying system has an automatic online correction function, which can ensure the continuous operation of the equipment for a long time.

3 Adopting new superheated water heating technology, can be adjusted freely online within the temperature range of (30-150). Due to the use of a liquid fully enclosed circulating heating medium, the stability of the heating temperature and the utilization rate of energy consumption are better than the traditional steam heating technique.

4 Using dynamic vacuum degree automatic online adjustment and control technology, the main parameters such as temperature, vacuum degree, and speed of the drying process can be optimized and combined, which is the most ideal economic benefit for the utilization rate of the equipment.

5 Using CIP automatic online cleaning system, the cleaning is diversified, and the equipment can be cleaned in an all-round way. The cleaning effect is thorough and fast, which meets GMP requirements.

6 The batching system, incoming and outgoing system can carry out a variety of optimized designs and configuration combinations according to the characteristics of different materials, which have met the user’s process requirements.

7 Based on the principle of humanized design: the main body adopts thermal insulation measures so that the working temperature of the equipment and the operating environment temperature are included in a suitable range.

Corresponding detection channels are evenly designed inside and outside the equipment, which is convenient for daily maintenance and maintenance.