Belt dryers have a wide range of applications, and they are currently used in pharmaceutical, food, biological, chemical and other fields. However, the standards for selection in each area are not the same, because the requirements and parameters of dry materials in various fields are quite different. For example, in the pharmaceutical industry (especially in traditional Chinese medicine), the viscosity of the extract is generally high, and the drying temperature is more stringent. The melting point should be controlled precisely (especially for the polysaccharides). The vacuum control range must be different. The heating temperature of the segment requires an online automatic adjustment function and so on. In addition, the detection system should be as complete as possible to comply with the pharmaceutical GMP standards. For the food industry, the solids content of the material extracts are generally relatively large (above 65%). The requirements for production volume, specific volume and appearance of the product are key in the selection criteria of vacuum belt dryers, and food grade vacuum belts. There are two factors that must not be ignored in the selection process of the dryer: one is the consumption ratio of the unit's energy consumption, and the other is the delivery of auxiliary equipment such as raw materials, the fine crushing of the dried product, and packaging. As for the vacuum belt dryers used in biology and chemical industry, because the products are in different forms, the selection criteria are extremely complicated. Therefore, extra caution is required.
The first step in selecting a vacuum belt dryer is to perform a small sample test on the dried material. This is important. Therefore, whether or not the equipment supplier has material testing equipment and experienced samplers is the most direct way for customers to measure the true capabilities of manufacturers. Qualified vacuum belt dryer manufacturers can generally provide customers with a copy of the actual evaporation of materials, dynamic drying vacuum degree, drying temperature distribution, the amount of feeding amount, the actual drying time in the shortest time after the material test. The technical parameter reports such as actual production capacity, unit energy consumption ratio, etc., facilitate customers to select equipment models and specifications that can meet production requirements.