Vacuum Spiral Dryer

The vacuum spiral dryer equipment is equipped with a heating jacket on the heating cone, and the heat source is hot water, thermal oil or low-pressure steam, so as to maintain a certain temperature on the inner wall of the cone. The variable frequency speed regulating motor drives the single screw belt agitator to rotate through a parallel helical gear reducer, and the animal material is rotated along the conical cylinder and lifted from bottom to top. After the material reaches the highest point, it automatically flows towards the center of the vortex and returns to the bottom of the conical cylinder by gravity and inertia. The entire process forces the material to be heated inside the conical cylinder, with relative convection and mixing. The heat diffuses among the materials, causing them to undergo irregular reciprocating motion in all directions, completing high-frequency heat transfer exchange between the material and the single screw belt and cylinder wall surface, and achieving heating and drying effect in a short time. Thus, the internal moisture of the material continuously evaporates. Under the action of the vacuum pump, the water vapor is drawn out by the vacuum pump. If it is necessary to recover the liquid, a condenser or a recovery liquid storage tank can be used for recovery. After drying, open the discharge valve at the bottom to discharge the material.

Characteristics and functions of vacuum spiral dryer:
1. The equipment adopts jacket and screw internal heating, which increases the overall heating area of the equipment by about 40%.
The single screw belt agitator used in the equipment is a patented product of our company, which can achieve the effect of bottom-up circulation stirring and obtain efficient forced heat transfer performance. When the material loading rate is between 40% and 100%, 100% heating utilization can be achieved. Suitable for mixing and drying delicate materials.
3. Fully sealed system, no foreign matter contamination, high cleanliness, especially suitable for mixing and drying of pharmaceutical intermediates and raw materials, as well as for mixing and drying sterile raw materials.
4. The small gap between the single screw mixer and the container wall can effectively prevent materials from sticking to the surface of the container wall.
5. Adopting a small angle conical cylinder structure, the unloading speed is fast, clean, and does not accumulate material.
6. Equipped with a recoil device: During the material drying process, the dust raised by the drying of the material adsorbs onto the vacuum trap, blocking the vacuum channel. The obstruction of the gas channel directly leads to an extension of the drying time. The lower the temperature and shorter the drying time of the material during the drying process, the less the impact on the quality of the material. In response to the above reasons, our company has developed a single cone dryer with a back blowing device installed on the vacuum collector, which can maintain the smoothness of the vacuum channel during the material drying process, thereby ensuring the drying time and quality.
7. The bottom discharge valve is a suction valve with reliable sealing, which is conducive to vacuum drying.
8. The equipment has a compact structure, operates smoothly, has good sealing, no lubrication leakage, is easy to operate, and has a long service life.