Torusdisc® - Single or Twin Rotor Dryer
The Torusdisc® dryer/heater/cooler is an indirect heat exchanger, with mechanical agitation of material. This indirect heating and drying system provides batch or continuous indirect heating, drying, cooling or reaction of solids, slurries, gels, filter cakes, powders, and viscous materials.
The Torusdisc® processor consists of a stationary horizontal vessel containing a tubular rotor with vertically mounted double-walled discs. These discs provide approximately 85% of the total heating surface. Other heating surfaces are the rotor shaft and the inner wall of the jacketed vessel trough.
During operation of this indirect heating and drying system, a high relative velocity between the rotating discs and the product contributes to a high heat transfer coefficient. Agitator plows or scraper bars can be added to increase exposure of new surfaces and prevent material build-up on surfaces. These design features allow the Torusdisc® to achieve heat transmission-coefficients two to six times greater than many other indirect dryers. Its rotor speed can be set for optimum heat exchange and thorough mixing, independent of residence time. Residence time ranges from minutes to several hours, making the Torusdisc® more versatile than almost any other indirect heat exchanger available today.
FEATURES OF THE TORUSDISC INDIRECT DRYER
1. Small Space Requirements
2. Energy Efficient
3. Maximum Drying Efficiency
4. High Heat Transfer Coefficient
5. Product Versatility
6. Application Versatility
7. Reduced Steam Requirements
8. Low Maintenance
APPLICATIONS OF THE TORUSDISC INDIRECT DRIVER
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FOOD
- Distillery and Brewery waste products
- Hexane extracted soybean meal
- Soy protein dextrose
- Corn and soybean waster products
- Fish meal
- Meat by-products/Rendering processes
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CHEMICALS
- Oxides
- Hydroxides
- Inorganic salts
- Fine chemicals
- Pharmaceuticals
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MINERALS
- Coal
- Lime
- Cement
- Yellow Cake
- Pigments
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PETROCHEMICALS / PLASTICS
- ABS
- Adipic acid
- Acrylics
- Acetates
- Polycarbonate
- Polypropylene
- Polyethylene
- Terephthalic acid
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SYSTEM # 1
Heat transfer fluid flows through a tubular rotor and hollow discs mounted on the rotor. Fluid also flows through the jacket surrounding the rotor.
Stationary agitator plows or scraper bars are located between the discs in order to achieve better mixing and to prevent material build-up on heat transfer surfaces. Transport of product is in an axial direction through the annular space between the discs and the vessel toward the discharge end, effecting high jacket heat transfer rates. Adjustable conveying vanes are fixed to the outer rim of the discs to control conveyance.
Residence time is independent of rotor speed and is adjustable by means of an overflow weir located at the discharge end. Therefore, the unit can be operated at the best rotor speed for optimum heat transfer.
The tubular rotor can be divided into two sections for gradual heating
and cooling processes using different heat transfer media with different
temperatures.
This unit as a dryer has two operating modes:
1. Indirect heat transfer
2. Combination direct and indirect drying system
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