I. Overview of Hollow Spiral Vacuum Dryer

The hollow spiral conveyer is a horizontal conveying equipment primarily driven by heat conduction, with the heat conduction section comprising the inner wall of the main unit and the hollow spiral blades. Due to its heat conduction method, the device emits very little gas, resulting in a low heat requirement, making it highly suitable for materials requiring solvent recovery or exhaust gas treatment. The specially designed jacketed spiral inside the unit allows for precise control of the material flow state and residence time within the equipment, enabling both continuous and batch production. This equipment uses a jacketed hollow conduction method, allowing for heating or cooling of the material. The device boasts excellent sealing properties and can be operated under vacuum or atmospheric pressure depending on different process requirements. This product breaks the limitations of previous equipment that only had a single function, making it a multifunctional, energy-saving, and environmentally friendly device.

Section II: Working Principle of Hollow Spiral Vacuum Dryer

The jacketed hollow spiral dryer-cooler has components including the main shaft (hollow), spiral blades (hollow), and wall surface (semi-tubular). Different mediums can be chosen for heating or cooling based on material requirements. Materials can be added in one batch, then the inlets and outlets are closed to form batch production. Alternatively, continuous feeding and discharging can be done through the outlet. Operation is controlled by adjusting the spiral's speed to regulate the material's residence time, achieving the desired drying or cooling.

Section 3: Features of Hollow Spiral Vacuum Dryer

1. Energy-saving; due to indirect conduction, most of the energy is absorbed and utilized by the material.

2. Environmentally friendly; under vacuum, no external air is carried, and emissions are all solvents, which can be recycled through a heat exchanger, achieving essentially zero emissions.

3. Broad application scope; the equipment allows for versatile selection of functions based on material processing requirements, such as heating, cooling, continuous, batch, vacuum, and atmospheric pressure.