Selection
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 a direct way for customers to measure the true capabilities of manufacturers. Qualified vacuum belt dryer manufacturers generally can provide customers with a short time after the material test includes: the actual evaporation of the material, the dynamic drying vacuum, the drying temperature of the distribution, the amount of feed size, the actual drying time, the actual Product capacity, unit energy consumption ratio, and other technical parameter reports are convenient for customers to select equipment models and specifications that can meet production requirements.

The second step in selecting a vacuum belt dryer is to comprehensively review the manufacturer's design level and manufacturing capabilities. On the basis of the material test report, the manufacturer will generally provide a draft of the technical design plan according to the customer's production indicators and working conditions and make a detailed statement of the design reasons in the plan. The technical design scheme is a very important part of assessing manufacturers' manufacturing capabilities in vacuum belt dryers, especially the design descriptions of the key technologies of manufacturers for equipment such as the design of vacuum systems, the design of heating systems, and the correction systems. Design, design of cleaning system and design of feeding and discharging systems. Another aspect of manufacturing capabilities is to examine the actual usage of the manufacturer's users. According to the list of users provided by the manufacturer, the customer may request to go to the site for a site visit. If the manufacturer does have sufficient strength, it will not refuse the reasonable request of the customer. Some of the customers even can provide multiple visit targets for customers to choose.

The third step in selecting a vacuum belt dryer is to examine the manufacturer's actual processing capacity and production scale. Because of the characteristics of large size, large number of auxiliary equipment, high configuration requirements, and complex intermediate links, vacuum belt dryers are not easy to maintain the long-term stability of the equipment. The price of this kind of equipment is also relatively expensive. Users are generally optimistic about its drying capacity and technical advantages and use huge amounts of money to purchase. Therefore, they all hope to recover the cost as soon as possible to improve the economic efficiency of the company. Therefore, when purchasing equipment, we must be able to choose a manufacturer with scale, practical design and manufacturing experience, and a reliable after-sales service guarantee system to be able to rest assured. Of course, the vacuum belt dryer provided by such a manufacturer generally has a slightly higher price, but There is a sense of security in the use of the user, the client must not be affected by the low price for a moment and may affect the overall situation.

Application area
It is suitable for the drying of sheets, strips, and granular materials with good air permeability. It is particularly suitable for dehydrated vegetables, Chinese Herbal Pieces, etc., which have a high moisture content and material temperature is not allowed to be high; this series of drying machines has a fast drying speed. Evaporation intensity, good product quality advantages. For the creamy material of the dehydrated filter cake, it may be dried after being granulated or made into a rod shape.