Vacuum Dryer with Rake for Efficient Drying Process

• Customization: Available
• After-sales Service: 1 Year
• Warranty: 1 Year
• Model NO.: 1500~22000
• Flow: Contra-Flow
• Heating Mode: Transmission
• Material Status: Powder, Solution, Cream, Strap, Bulk, Alipay
• Drying Medium: Superheated Steam
• Operational Method: Continuous
• Type: Vacuum Rake
• Material: Stainless Steel
• Speed: 7-8r/Min
• Application Scope: Thermal Sensitivity and Oxygen Sensitivity Mud Li
• Moisture Content: 15~90%
• Power: 4-15kw
• Transport Package: Standard Wood Package
• Specification: 1.6~22m3
• Origin: China
• HS Code: 8419399090

Product Description

vacuum rake dryer

 

Equipment Overview
Vacuum rake dryer is a horizontal stirring type dryer that mainly uses indirect heating through heat conduction. The blades of the horizontal rake mixer inside the dryer are made of cast steel or thick walled seamless pipes, installed on a circular spindle, with half of the blades oriented to the left and the other half to the right. The speed of the shaft is 7-8r/min, which is driven by a transmission motor with a reducer. At the same time, automatic steering is set to change the rotation direction of the mixer every 5-8min when the main shaft rotates.

 

Working principle
The dried material is added from the middle of the shell, and under the stirring of the continuously rotating rake teeth, the surface of the material comes into contact with the shell wall, constantly updating. The dried material is indirectly heated by steam, causing the moisture of the material to vaporize. The vaporized moisture is promptly removed by a vacuum pump. This machine can also use a sandwich layer and rake teeth to heat simultaneously, with a larger heat transfer area and higher thermal efficiency, enabling it to achieve higher drying efficiency.
Due to the high vacuum degree of operation, the surface water vapor pressure of the dried material is much greater than the water vapor pressure in the evaporation space inside the drying machine shell, which is conducive to the discharge of internal and surface moisture of the dried material, and facilitates the movement of water molecules in the dried material, achieving the drying purpose.
The vacuum rake dryer device uses a steam jacket to indirectly heat materials and exhaust them under high vacuum, making it particularly suitable for drying materials that are not resistant to high temperatures, are prone to oxidation at high temperatures, or are prone to powder production during drying (such as various flammable and explosive materials), as well as materials that must be recovered from the steam or solvent discharged during the drying process. The highest moisture or solvent content of the dried material in the vacuum rake dryer is 90%, while the lowest is only 15%. The dried materials can be in the form of slurry, paste, granules, powder, or fiber.

Application scope
Suitable for drying batches, thermal sensitivity and oxygen sensitivity Mud like and paste like materials with a moisture content range of 15%~90%.
Performance characteristics
★Wide adaptability and application: Due to the use of jacket heating and high vacuum exhaust, the rake type vacuum dryer is suitable for almost all materials with different properties and states, especially for drying explosive, easily oxidized, and paste like materials;
★Low steam consumption: Due to the fact that vacuum rake dryers often use steam to pass through the jacket and use latent heat to heat materials, the steam consumption per kilogram of finished products is relatively small. Generally, evaporating 1kg of water requires 1.3-1.8kg of steam;
★Easy to operate: The vacuum rake dryer is easy to operate, with fewer personnel and low labor intensity. The loss of material leakage has been reduced, improving environmental hygiene.
★Good product quality: Due to the continuous forward and backward rotation of the rake teeth during the drying process, the dried material is stirred evenly to avoid overheating and easy escape of moisture, resulting in products with low temperature and extremely low moisture content. Due to the fine particle size of the product, it can be packaged without the need for crushing;
★Without air intervention, the condenser has a low load, making it convenient to recover material solvents;
★According to the different characteristics and requirements of drying materials, the sealing system of the dryer can be selected from two types: packing seal and mechanical seal. The special design ensures sealing performance and service life;

Thechnical Parameter

	Total Volume m3	Product volume m3	A	B	C	D	E	F
			mm	mm	mm	mm	mm	mm
1500	1.6	1.0	1000	2000	5000	810	2730	750
2000	2.0	1.3	1200	1800	5200	1000	3180	900
3000	3.4	2.2	1200	3000	5590	1000	3270	900
4000	4.0	2.6	1200	3550	6140	1000	3270	900
5000	5.0	3.0	1400	3200	5950	1100	3900	1150
6000	6.2	3.7	1400	4000	6750	1100	4300	1150
8000	8.0	5.0	1600	4000	6950	1200	4300	1250
10000	10.2	6.3	1800	4000	7130	1380	4000	1450
12500	12.5	7.7	1800	4900	8050	1380	4000	1450
15000	14.3	8.7	1800	5600	8950	1380	5650	1450
18000	18.7	11.4	2100	5500	9100	1540	5650	1650
22000	22.0	13.4	2200	5800	9400	1620	6600	1800