Bella™ Dryer/Cooler

Experience Premier Bulk Solids Drying, Heating or Cooling with the Bella™ Dryer/Cooler

The Perfect Way to Heat, Dry, Cool or Moisturize Dry Solids

The Bella™ dryer/cooler offers a highly efficient method of drying or cooling powders, granulates and filter cakes. The rapid mixing capability of the Bella dryer/cooler makes it an ideal heater or cooler, since the process of drying or cooling is simply the mixing of hot or cold air with the material. The better the mixer, the better the drying or cooling performance. 

This unit can be used for drying, cooling, mixing, spraying or agglomerating, making it a versatile and valuable bulk solids handling solution. And with countless different industry applications, businesses ranging from food processing to foundries can benefit from this innovative technology.

What are the Benefits of the Bella Dryer/Cooler?

• Low Energy Requirements: Since the Bella mixer is one of the fastest mixers for mixing dry granular powders and granulates, when used as a dryer or cooler it becomes highly efficient. This creates substantial  energy savings which can have a huge impact on lowering operational costs.
• Improved Material Characteristics: Additionally, the gentle agitation of the mixing paddles produces a very desirable finished material which is consistent in texture, moisture and particle size.
• No Material Stagnation: Twin counter‑rotating paddles keep all material in continuous motion, eliminating dead zones and preventing any chance of stagnation. Because the material never settles, every particle experiences extended exposure to the heated or cooled air, improving overall thermal efficiency. The constant agitation slightly suspends the material, allowing air to move freely around each particle as it cycles in and out of the weightless zone before the heated or cooled air is allowed to exit.
• High Thermal Efficiencies: This process also maximizes the total surface of the material which is exposed to the heated or cooled air, increasing the thermal efficiency. 
• Customizable: The Bella dryer/cooler can be customized to fit your unique size and finish preferences upon request.
• And More: From low maintenance requirements to the flexibility to choose between continuous or batch operation, efficiently cooling or drying solids is easier than ever with the Bella dryer/cooler.

How does the Bella bulk solids dryer/cooler work?

Figure 1

The Bella dryer/cooler consists of twin drums which have two counter rotating agitators with specifically angled paddles. The paddles sweep the entire bottom of both drums. The material moves in a horizontal counterclockwise direction at the perimeter while simultaneously moving both left and right in the center (figure 1). The hot or cold air enters the drums at Zone B and Zone C. The air then moves downward in the direction of the moving agitators (figure 2), moving in and around the material and in and out of the weightless zone.

The material in Zone B and Zone C (figure 2) is in its normal gravimetric state as material and air are mixed together by the agitators. In Zone A, a weightless zone is created allowing the material to move freely and randomly and mix thoroughly with the hot or cold air, thereby achieving maximum contact with the material for maximum efficiency.

Heating/cooling procedure

The supply air inlet temperature can be as hot or as cold as the product will allow. Once the heating or cooling process has begun, the product temperature immediately rises or falls to a controlled temperature.

Heating or cooling  bulk solids is dependent on four parameters: air flow, air temperature, air humidity and process efficiency. The Bella optimizes these parameters.

Benefits Summary

• Improved material characteristics
• Excellent heat transfer rates
• High thermal efficiencies
• Added mixing capability
• No material stagnation
• Minimal exposure time
• Operating temperatures from
• Operating temperatures from 38° F (3° C) to 212° F (100° C)
• Gentle, low shear agitation
• Easy access doors
• Low maintenance requirements
• Low energy requirements
• Continuous or batch operation

Applications

• Weight reduction
• Volume reduction
• Reclamation
• Liquid/solid separation
• Dewatering
• Foundry shakeout sand cooling/drying
• Product sterilization
• Crystallizing PET
• Organic and inorganic compound drying
• Detergent powder drying
• Milk powder drying
• And many more