Hollow spiral vacuum continuous dryer

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This post was last edited by AiDrying on 2023-3-9 at 14:32. Overview of the hollow spiral vacuum continuous dryer: The hollow spiral vacuum continuous dryer is suitable for continuous production under vacuum conditions; it enables the rapid decomposition and evaporation of water in materials at low temperatures, making it ideal for drying heat-sensitive materials； Drying at low pressure results in a low oxygen content, which prevents the material being dried from oxidizing and deteriorating; it can be used to dry flammable and explosive hazardous materials ； It is capable of recovering valuable and useful components from the dried material ； It prevents the release of toxic and harmful substances present in the dried materials, representing an environmentally friendly \"green\" type of drying. Since this device solves the problem of continuous production under vacuum conditions, it is more energy-efficient and environmentally friendly than conventional devices. Working principle: The hollow spiral vacuum continuous dryer features a large-area conductive stirring vacuum structure, which enables continuous feeding and discharging in a vacuum environment. The main components of the device include: the spindle (hollow), the spiral blades (hollow), and the wall surface (semi-tubular), among others ； The housing is of W-shaped design, and generally two hollow spiral shafts are arranged inside the housing ； The housing is equipped with a sealed end cover and an upper cover to prevent the leakage of material dust and ensure optimal performance. Depending on the temperature requirements of the material, different heating media can be used: such as hot water, steam, or heat transfer oil. The heat transfer medium flows through the rotary joint, the shell jacket, and the hollow spiral shaft. The material can be fed continuously through a dedicated feeding device; the residence time of the material is controlled by the rotation speed of the screw, and after achieving the desired level of drying, it is discharged continuously from the outlet. Features -- Energy-saving: Due to indirect conduction, most of the energy is absorbed by the material. --Environmental protection: There is no air present under vacuum, so the only emissions are solvents; these solvents can be recovered through heat exchangers, achieving zero emissions. --Wide range of materials that can be processed: suitable for various types of materials. --Common media include: water vapor, heat transfer oil, hot water, etc. --Low operating costs: Simple operation, easy loading and unloading, which reduces the workload on workers ； Environmental pollution affecting the materials is reduced, improving product quality ； A reasonable device design makes maintenance simple and convenient. Applicable materials ◎ Heat-sensitive materials that cannot withstand high temperatures ◎ Materials that are prone to oxidation, as well as those that are flammable and explosive ◎ Materials that require the recovery of solvents and toxic gases