Kilburn Engineering Ltd

Fluid Bed Dryers

Fluid Bed Dryers

KILBURN  manufactures Fluid Bed Dryers and Coolers in technical collaboration with M/s. NARA MACHINERY COMPANY, JAPAN, the world leader in this field.These dryers/coolers utilize the FLUIDIZED BED TECHNIQUE to effectively dry many chemical, petrochemical, and other products.

Fluidized bed technique is most effectively utilized in a number of heat and mass transfer applications like:

• Drying
• Cooling
• Calcination
• Roasting
• Carbonization
• Reaction
• Sterilization

PRINCIPLE OFFLUIDISATION

Fluid means a liquid. A substance is said to be fluidized when it starts behaving like a liquid. When a determined quantity of air is passed below a perforated bed, carrying the substance to be dried, say PVC, the material starts bubbling and it behaves like a fluid. Much depends upon the substance, its moisture content, size of perforations, and air flow.

When the air velocity is low, the bed of solids remains still. As the air velocity increases, the particles on the upper part of the static bed begin to move and separate from one another.
When the air velocity is further increased . all the particles begin to float The particulate bed is expanded and the movement of particles become an active formation of a mixture of air and particles. This gas­solid mixture is called “Fluidised Bed”

ADVANTAGES

• Intimate contact of hot air and solids result in high heat transfer co-efficient. This makes the drying system compact
• High operating temperatures possible because of rapid heat and mass transfer rates.
• No overheating of heat sensitive products because of special constructional features.
• Unique and thermally efficient design of embedded Heat Exchanger.
• Lower capital costs.
• Easy control of residence time & simple to adjust moisture content of dried product.
• Easy handling of feed and product. No Moving parts, stabilized operation and negligible maintenance.