overview
The through axis double door vacuum rake drying machine is a through axis vacuum negative pressure drying machine. It is the latest and most advanced new drying equipment launched by our company based on the long-term development of the full door cantilever shaft rake mixing vacuum drying machine, which is the first of its kind internationally.

Application scope
Drying of materials in industries such as medicine, food, and chemical: suitable for pulp, paste, and powder materials; Thermally sensitive materials that require low-temperature drying; Easily oxidizable, explosive, strongly irritating, and highly toxic materials; Require the recycling of materials containing organic solvents.


One of the advantages: innovative applicability
The novelty of the through shaft double door vacuum rake dryer lies in the fact that "the through shaft can open the door", which is the core point for this technology to obtain patent authorization.
The applicability of "through axis can open the door" lies in its ease of cleaning, ability to clean the warehouse, and compliance with GMP requirements.

Advantage 2: Sealing of the shaft
The reasonable structure of the support at both ends of the through shaft double door vacuum rake dryer overcomes the disadvantage of unstable operation of the cantilever shaft support at one end; The two ends of the shaft support stable operation and will not cause damage to the shaft seal. The shaft of the cantilever shaft single door vacuum rake dryer is supported at one end. During production operation, due to the weight of the shaft itself and the pressure resistance of the dried material, it causes deflection to the left, right, and downward. Therefore, the shaft seal was quickly damaged and leaked, resulting in shutdown.

Advantage 3: High yield and efficiency
The stability of the support at both ends of the machine shaft determines its ability to carry the dried material and make reasonable use of the machine's volumetric space (the inherent volumetric space of the cantilever shaft dryer cannot be utilized properly, resulting in waste of time, manpower, and energy), maximizing production capacity.
The carrying capacity of the through shaft double door vacuum rake dryer is 1.45-1.6 times that of the cantilever shaft single door vacuum rake dryer, and the production capacity is 1.17-1.3 times that of the cantilever shaft vacuum rake dryer. It is more than 5 times and 10 times more energy-efficient and high-yield than flash evaporation and box type vacuum rake dryers. The application of this machine can achieve significant economic benefits.

Advantage 4: Low energy consumption and energy-saving of the motor
The electric motors equipped for the 2000L capacity through shaft and cantilever shaft rake dryer are 15KW for the through shaft and 18.5KW for the cantilever shaft.

Advantage 5: Security
The reasonable structure supported by both ends of the shaft ensures stable operation. Even under the pressure resistance of the dried material, it will not produce deflection or cause the rake teeth to scrape the wall. Therefore, even if the dry material contains flammable and explosive organic solvents, there is no risk of ignition or explosion.
The structure supported by one end of the cantilever shaft is unstable during operation, and the shaft is prone to deflection, especially when overloaded by dry materials and with high material viscosity, which can cause the rake teeth to scrape the wall. If the dry material contains flammable and explosive organic solvents, there is a risk of ignition and explosion.
Not afraid of ten thousand, just afraid of what if!

Advantage 6: More suitable for dry and viscous materials
The reasonable structure supported by both ends of the shaft ensures stable operation, thus it can resist the pressure resistance of the dried material. So, this machine is more suitable for drying materials with strong viscosity. The structure supported by one end of the cantilever shaft deflects due to the compressive resistance of the dried material, causing the rake teeth to scrape the wall and affecting the normal operation of production.

Advantage 7: Low maintenance rate
The reasonable structure supported at both ends of the shaft will not cause deflection due to the compressive resistance of the dried material, so the shaft seal is not easily damaged.
Due to the structure supported at one end, the cantilever shaft is subjected to the compressive resistance of the dried material, resulting in deflection and damage to the shaft seal and rake teeth scraping the wall, which increases the equipment maintenance rate.
The work of repairing shaft seals is very heavy, requiring lifting equipment, moving hammers, dismantling bearings and other entire transmission parts, re debugging, etc., resulting in long production downtime.

Advantage 8: Beneficial for intermittent continuous production
The reasonable structure supported by both ends of the shaft ensures stable operation. Even under the pressure resistance of overloaded dry materials, there will be no deflection, no scraping of the rake teeth, and no shutdown phenomena such as "stuffiness" or leakage. This is conducive to the planned continuous production of the time period.
However, due to the structure supported at one end, the cantilever shaft operates unstably and undergoes deflection due to the pressure resistance of the dried material. The shaft seal is damaged, and the rake teeth scrape the wall and cause blockage, resulting in production stoppage and affecting the continuous production period.

Advantage 9: Flexible and convenient double door
The double door has a small volume (compared to the full door of the cantilever shaft vacuum rake dryer), flexible opening and closing, easy operation, reduces labor intensity, and the door shaft is not easily damaged, with almost no maintenance.
The fully opened door with a cantilever shaft has a large volume, is bulky, and very inconvenient to operate. The door shaft is prone to damage, has a high maintenance rate, and is difficult for workers to operate.

Advantage 10: Small gap between rake teeth and cylinder wall
The reasonable structure supported at both ends of the shaft ensures stable operation without deflection due to the pressure resistance of the dried material. The minimum gap between the rake teeth and the cylinder wall can be adjusted to 1-2mm. The small gap between the rake teeth and the cylinder wall makes it difficult to form a material layer, allowing the material to receive sufficient heat conduction, thereby shortening the drying time and saving energy.
The structure supported by one end of the cantilever shaft will definitely produce deflection when the shaft is subjected to the compressive resistance of the material, causing the rake teeth to scrape the wall. The gap between its rake teeth and the cylinder wall is 5-8mm, which easily forms a material layer of 5-8mm, which affects the heat conduction of the material, takes a long time to dry, and wastes energy.