Expertise in granular Products processing

The Vibrating Fluid Bed     Products with a wide particle size distribution or including large particles, cannot be processed in a static fluidization equipment. It is the same for products discharged from centrifuges which are sticky or include lumps and which will not permit treatment by direct fluidization. comessa developped the Vibrating Fluid Bed processor to solve most of these delicate drying problems.     click the picture to enlarge     Advantage of the vibration in a Fluid Bed: In a Vibrating Fluid Bed, agitation of the product is partly generated by a vibrator shaking the fluidizer's casing whereas agitation in a static unit is obtained by pure fluidization. The gas flow requirements are determined by processing considerations. The direction and force of vibration are readily changed to adapt to the needs of an extremely diversified sampling of products. click the picture to enlarge           Technological description of the Vibrating Fluid Bed : In a Vibrating Fluid Bed, the mechanical energy is added to the aeraulic energy of upgoing gas stream in the Fluid Bed. This allows the processing of products having a wide particle size distribution or cohesive properties. comessa offers several types of Vibrating Fluid Beds : Forced oscillation type, where the vibration is generated either by vibrating motors (VFB with coil spring suspension) or by exciters (VFB with leaf spring suspension). The size of the Fluid Beds with vibrating motors ranges from 0.3 to 14 m². The size of larger Leaf springs supported VFB varies from 10 to 26 m². High excitation frequencies and low amplitudes are used for these types of Fluid beds. Resonance VFB types, are characterized by high amplitudes and low excitation frequencies. These machines are available in sizes from 10 to 30 m². comessa is able to adapt the characteristics of the vibration to the different nature of each product thanks to the wide range of proposed items.   click the picture to enlarge   Main applications : Chemical industry : Amino acids, Boric acid, Citric acid, Oxalic acid, Alumina prills, Potassium bromide, Synthetic rubber, Sodium chlorate, Explosives, Sodium metabisulphite, Sodium metasilicate, Sodium monopersulfate, Potassium nitrate, Sodium nitrate, Sodium perborate, Trisodium phosphate, Polystyrene, Polyethylene, Ammonium sulfate, etc... Food Industry : Extruded food, Coffee beans, Soya beans, Sunflower beans, Chocolate granules, Lactose, Yeast, L-Lysine, Nutmeg, Milk powder, Tomato powder, Soya proteins, Salt, Sugar. Minerals industry : Clay, Bauxite, Lime, Calcium carbonate, Coke, Abrasive materials, Sand. Miscellaneous : Match sticks, Wood sticks, Natural rubber, Vichy salt.