From Drops to Powder From a Suspension to a Granulate. Innovative Processing of Fluids in Fluidised Bed Dryers

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1 From Drops to Powder From a Suspension to a Granulate Innovative Processing of Fluids in Fluidised Bed Dryers

2 Turn suspension and pastes into... Exhaust air Liquid Liquid ALLGAIER fluidised bed dryers are the solution to even the most difficult problems in the processing of liquids for the production of granulates and powders. Several processing stages can be combined into one single process step: - concentration of liquids - shaping by granulation or agglomeration - subsequent drying - classification and dust removal The simple operation of the fluidised bed dryers and their economical production method offer new possibilities for achieving higher-quality products. Fluidised beds provide ideal conditions for the optimum of head and mass transfer. This results in high energy densities which require only low plant volumes. Fluidised beds have a very uniform temperature profile and are thus also suitable for handling products which are sensible to high temperatures. Drying air Classifying air Granulate

3 high-quality powders or granulates. With the ALLGAIER fluidised bed dryers, liquids can be processed to form granulates or powders. Typical examples are: - salt solutions - pigment suspensions - sodium nitrate solution - sodium sulfates - organic acids - leakage water from garbage dumps - fertiliser suspensions - detergent concentrates - potash solution - waste water from synthetic resins - sorbitol - dextrose and glucose - ferrites - cereal slops - milk and whey - gelatine - yeast suspension - starch slurry - mixtures of mineral compounds - liquid manure - enzyme solution - flue-gas washing water - waste water from chemical or pharmaceutical processes - instant beverages - animal food mixtures

4 Granulation dryers: From fluid to granulate. During granulation, the fluid containing solid materials is injected through nozzles into the fluidised bed, where it comes into contact with the fluidised solid particles. The heat entering the dryer with the drying air vaporises the water or the solvent contained in the fluid, causing the solid material to be deposited on the granulate nuclei. This result in solid grown granulates by layered growth which are often of very good flowability. Once the granulates have reached the desired size, they drop through the classification tube and are removed from the dryer. Suspension Pump Air Air heater Granulation dryer Cooling Dust Crushing Exhaust Air Screening Machine Procuct

5 Reliable production of defined grain sizes. The ALLGAIER method is characterised by its high stability with respect to variations of the solid concentration in the feed and to variations in the feed capacity. Modern dosing devices permit precise compliance with defined formulas. The possibility of operating the granulation dryer in a closed circuit with superheated steam or solvent vapour results in a process free of exhaust air which is particularly suitable for the handling of toxic materials or for the treatment of dangerous waste materials. Our fluidised bed dryers can also be used for the continous agglomeration of powders or dusts to form easily soluble instant products such as instant coffee or tea. We will gladly test the granulation abilities of your new products in our technical testing centre.

6 Suspension and paste dryers: from fluids to powders. Suspensions, solutions, difficult pastes or solid filter cakes can be homogenised, dried and converted into powders with suspension and paste dryers. The feed injected through nozzles dries on the inert particles of the fluidised bed. In the process, the solid material in the liquid is converted reliably into a very fine powder which is carried out of the dryer by the flow of drying air. It is then separated from the air in high-performance filter systems. Suspensoin and paste dryers are extremely suitable for the processing of: - catalysts - metal hydroxide suspensions - anorganic sludges and waste water - boron nitride - carbonate slurry - salt solutions - pigment suspensions - sodium nitrate solution - mirabilite - organic acids - flue-gas washing water - leakage water from garbage dumps - ceramic glazing suspensions

7 Fully automatic plant control. The high efficiency of the fluidised bed, the optimal utilisation of energy, the clear conception of the plant and the safe process control of the ALLGAIER suspension and paste dryer offers you an opportunity to produce powders with a very economical process. The dryer can be heated with any commonly used heat transfer medium. The exhaust gas temperatures are normally low, resulting in optimum utilisation of the energy. Simple control concepts permit operation with only a few persons or even fully automated operation. Experimental plant in the ALLGAIER technical testing centre.

8 Allgaier Process Technology GmbH Ulmer Straße Uhingen Germany Phone: Fax: Manufacturing companies: Mogensen GmbH & Co. KG Kronskamp Wedel Germany Phone: Fax: Fredrik Mogensen AB Sveavägen Hjo Sweden Phone: Fax: Allgaier Mogensen S.A.U. C/ Téllez, 24 - Oficina 4A Madrid Spain Phone: Fax: info@almo.es