Vertical Vacuum Drying System (Ribbon type)

Materials are fed into the dryer via a dust-free unpacking station using both ton bags and small bags, and then conveyed into the dryer via vacuum conveying. Once inside the dryer, the jacketed cylinder (which can be vented with steam, heat transfer oil, or hot water) provides a uniform heat source for the material. Heating functions are also optional for the main shaft and screw ribbon. A special internal screw ribbon agitator continuously agitates the material, ensuring full contact between heat and the material, making the drying process more efficient. The high vacuum environment significantly lowers the liquid boiling point, achieving low-temperature, high-efficiency drying. Steam generated during the drying process is extracted by a vacuum pump and cooled and recovered by a condenser. The dust collector features heating and nitrogen backflushing functions to prevent dust blockage and backflush it into the tank, maintaining system cleanliness. A side-wall nitrogen inlet device intermittently injects nitrogen to break the vacuum, enhance convection, shorten the drying cycle, and improve drying efficiency. After drying, the material is cooled by the jacket and quickly discharged through a high-seal hemispherical valve or expansion ball valve. The entire machine adopts a mechanical seal structure, providing excellent sealing performance, convenient disassembly and maintenance, ensuring long-term stable operation and low maintenance costs.