Continuous Fluid Bed Dryers

A continuous fluid-bed dryer/cooler is a machine in which a continuous flow of damp, granular material is conveyed over a perforated bed, through which air is blown to bring about fluidization. The material is dried in the first section of the machine and cooled in the second. Drying occurs because of the direct contact between the damp material and the hot air blown through it. The air velocity is adjusted to keep the moving layer of material fluidized. The same mechanism applies to the cooling part of the process, except that the air used is either ambient or conditioned (ie cooled). The drying and cooling sections of the machine form a single conveyor in which the hot and cool air flows are segregated. Conveying of the product is achieved either by means of a low-frequency, high amplitude shaker mechanism.

Fluid bed dryers are specially preferred in mineral drying in combination with after cooling and heat recovery, resulting in better end product quality and very low energy consumptions.

interior of continuous Autoclave
Advantages of continuous fluid-bed dryer system technology
Low energy consumption compared to other type of dryers
Accurate control of the residence time, product is dried uniformly
Gentle on sensitive materials (no friction)
Low operating costs
Cooling section integrated in dryer
Handling of sticky products (from centrifuges or filters)
Small footprint
Process flexibility
Reliable system, less downtime

TEMA Process B.V. is a specialised design and manufacturing company for Fluid Bed Systems for drying of minerals, chemicals, food, feed, biomass, etc. The TEMA Fluid Bed can be applied not only for drying, but also for cooling, roasting, torrefaction, puffing, blanching, stripping , spices and herbs sterilisation and pasteurisation and calcining.

TEMA Process B.V. manufactures continuous and batch fluid beds. Batch fluid beds are used when products integrity is required for example in the pharma industry or for small quantities of product. Continuous dryers / coolers can be delivered in static or dynamic (shaking, vibrating) fluid beds. Static fluid bed can be delivered with or without submerged heat exchangers.

Types of Fluid bed dryers
fluid bed dryer unit
Fluid bed units
A fluid bed is an effective unit to thermally treat powders, crystalline products, pelletized or extruded materials. High heat and mass transfer are obtained as a result of the intimate contact between fluidizing air and product.

tema-process fluid bed dryers Shaking fluid bed
Shaking fluid bed
units for continuous operation and suitable for sticky materials with a wide particle size distribution. The shaking motion improves the fluidization and transport of any material within the fluid bed. Drying gas temperature up to 750 °C and product temperatures up to 400 °C are achieved.

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