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Vertical Vacuum Dryer
Vertical ribbon vacuum dryer integrates mixing, reaction and drying, widely used in battery materials, food, chemical, building materials and other industries. The equipment is equipped with a heating jacket, and the main shaft and ribbon can also be equipped with heating function, which significantly improves drying efficiency. Special ribbon design ensures thorough material tumbling and minimal clearance to cone wall, reducing material adhesion. Main shaft adopts mechanical seals achieves high-vacuum sealing, efficient drying with vacuum system, 3–5 times faster than conventional machines. High vacuum lowers liquid boiling point for efficient low-temperature drying, shortening heating/cooling time and improving batch productivity. The equipment is equipped with a dust collector at the top with a back-blowing device, which can introduce nitrogen gas to block and back-blow the sucked-up material, reducing loss. Additionally, a condensation recovery device can be optionally installed to recover the evaporated solvent. The equipment supports PLC automated control (such as temperature, vacuum degree, speed, and other key parameters) and is equipped with signal interfaces to facilitate remote monitoring and operation.
Product Overview
| Capacity Range | 40-15,000L (working volume is 20-60% of the design volume) |
| Material | SS304/SS316L/SS321 stainless steel, wear-resistant steel, duplex steel, Hastelloy steel, titanium, nano-ceramic coating, Teflon coating, silicon carbide coating, zirconium oxide coating, alumina coating, tungsten carbide coating, etc. |
| Agitator | Ribbon type (optional: ribbon bar round hole design or main shaft and threaded bar heating) |
| Vacuum Degree | Up to 5mbar |
| Heating Temperature | 50-300℃ (with outer heat-insulating decorative layer) |
Product Advantages
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Versatile Temperature Control
Heating is typically achieved using circulating hot oil/hot water/steam, or electric heating rods can be directly installed within the jacket. Using a circulating heating system, one heat source system can be configured with multiple drying and mixing units.
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Vacuum System (Assisted system for drying process)
To improve the drying performance of the mixer, a vacuum is typically created inside the mixer during heating and drying, reaching a vacuum level of up to 5 mbar. This high vacuum environment significantly reduces the boiling point of the liquid and the liquid content in the air, shortening the overall drying time by approximately 40%. To reduce the amount of dust extracted from the mixer during vacuuming, a bag type dust collector (with a backflushing device) is installed on top of the mixer to minimize raw material loss. Additionally, a condensation recovery filtration device can be added to allow for the recycling of the liquid material.
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Rich Application Experience, Targeted Non-Standard Design
To meet the diverse requirements of different industries regarding raw material properties, finished product characteristics, pressure and temperature requirements, solid-liquid ratios, and supporting processes, SIEHE can provide customers with a variety of customized solutions. For example, in the field of solid electrolyte material preparation for the battery materials industry, SIEHE has developed high-performance equipment that fully meets the complex operating conditions such as high vacuum, high sealing performance, high temperature resistance (300°C), corrosion resistance, high purity,
and explosion-proof design. -
Reliable Drive Configuration
Drive units with various capacities, power, and output speeds are configured based on material properties, starting methods, and stirring methods. The drive motors are sourced from top international motor suppliers such as INNOMOTICS (SIEMENS), ABB, SEW, etc., and can be connected via direct driven, sprocket connection, or hydraulic coupling for torque output. K-series spiral bevel gear reducers (or H-series gearbox reducers) are commonly used, offering advantages such as high safety factor, large rated torque, high transmission efficiency, safe, long service life, low operating noise, low failure rate, and easy maintenance.
Related Video
Technical Parameter
Optional Functions:
Vacuum system: dry screw pump, water ring pump + Roots pump combination, rotary vane pump, etc., realizing automatic constant pressure control. Equipped with dust collector.
Heating unit: hot water, hot oil or steam heating, to achieve automatic temperature control.
Cooling unit: air-cooled or water-cooled chiller, to achieve automatic temperature control.
Multiple liquid spraying/atomizing units are available for coating and granulation etc.
Optional CIP/SIP online cleaning and sterilization system, one-button operation.
Optional automatic control system: HMI + PLC control, parameter storage and output, remote control is supported.
Working Principle
After the material is vacuum-transported to the dryer, it is heated and dried through the jacket of the mixing chamber wall. The steam generated by heating is extracted by the vacuum pump and recovered to the storage tank through the horizontal condenser at the front end of the vacuum pump. High-vacuum sealed environment lowers boiling point for efficient low-temperature drying, shortening heating / cooling time and improving discharge efficiency. The dust collector is equipped with heating and nitrogen backflushing functions to block the powder sucked up by the vacuum and backflush it into the mixing chamber, keeping the system clean. Nitrogen purge on side wall breaks vacuum intermittently and enhances convection, shortens drying cycle and aiding material discharge. After drying, materials are cooled via jacket and discharged quickly through a half-ball valve or expansion ball valve, with high sealing performance and minimal dead zones.
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