To understand what kind of material is suitable for vacuum belt drying, you must first understand the two main technical parameters of the vacuum belt dryer: 1) dynamic vacuum range; 2) heating temperature range.
Since the vacuum belt dryer is a dynamic drying device that continuously feeds and continuously discharges, the vacuum degree can not be measured by the conventional static method.
At present, the range of dynamic vacuum of domestically produced equipment is generally designed to be between 1000 and 5000 Pa, which is determined by the overall structure of the equipment. Corresponding to this dynamic vacuum range, the evaporation temperature of clean water is roughly between 40 and 140 ° C (evaporation above 100 ° C is because the drying speed can be accelerated in a vacuum environment). The heating temperature of the vacuum belt dryer is divided into the direct temperature of the heating plate and the indirect temperature of the material surface. The lower the evaporation temperature, the smaller the heat transfer coefficient between the two, and the larger the temperature difference; the higher the evaporation temperature, the smaller the temperature difference. Therefore, in general, the design temperature of the heating plate of the vacuum belt dryer is 45 ° C to 145 ° C.