Working principle
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CT-DRYER WORKING PRINCIPLE The Hosokawa CT-dryer is a conical vertical ribbon dryer especially designed for drying of granules, powders, filter cakes and granulating of powders. Central single or double helicoidal ribbons ensure a constant motion and move the whole batch, which results in high heat transfer and short drying times. All the experience of Vrieco-Nauta® and Cyclomix mixer/dryers has been putted to developed this dryer. The products being dried are subject to minimal mechanical en thermal stress. Therefore even fragile and heat sensitive products can be mixed with this mixer. The Hosokawa CT dryer is a conical vacuum dryer which is developed to: reduce drying times reduce building height reduce maintenance costs The CT dryer is available with different rotor and vessel to suit the best to customer requirements. Research in laboratory with some products, has shown that the heat transfer rate could be improved up to 50% compared to other dryers due to the design of the Hosokawa helicoidal ribbon rotor. The CT vacuum dryer is a contact dryer. Heat energy is basically transferred into the product through the jacketed vessel wall causing solvents or residual moisture to evaporate. Schematic sketch of jacketed vessel The helicoidal ribbon transports the product, helps the vapours escaping to the surface and provides at the same time a continuous exchange of product in contact with the vessel wall. Fields of application This selection chart below illustrates what are the possible applications of the CT and of the Vrieco- Nauta® dryers. Drying Rate Dry powder …… Wet powder ….. Paste ….. Slurry ……. Suspension Each of the above dryers has his specific field of application and benefits. Our specialists can assist you selecting and evaluating the most suitable technologies to handle your products. n our laboratory in Doetinchem, both types of dryers are available for testing. Main features of the CT dryer: The Hosokawa CT Dryers are built as totally enclosed systems and when operated under full vacuum they offer the following advantages: Fast drying time with quick and efficient removal of vapours Total product in movement during drying, so high heat transfer Compact design with reduced height Low end moisture achievable even with bonded moisture Recovery of pure solvents is possible Transmission completely outside the vessel No bearings or seals in the vessel Special outlet valve to insure deep vacuum Full compliance with international standards and guidelines like FDA, cGMP, GAMP, EHEDG Customized seal and Mechanical seal design including sterile versions Automated cleaning solutions with our famous robotised Cyberjet and our patented CIP filter and CIP Skids HOW PROCESS WORKS Heat energy is basically transferred to the product from a heated jacket causing solvents and moisture residues to evaporate. A central helicoidal ribbon refreshes the product on the heated vessel wall and assists the vapours to escape to the surface. The jacket can be heated by media like steam, hot oil, water, etc. A vacuum system holds the vessel under constant vacuum and removes the vapours through a dust filter fitted on the top of the vessel. The vacuum conditions allow evaporating vapours at lower temperatures which enables to dry heat sensitive products. For recovery of solvents a condenser together with a receptacle will be provided. It can be installed before but also after the pump depending on the solvents. The moisture of the product can be controlled by means off: Weighing the condensate Taking samples without breaking the vacuum As an overview, we can mention the following processes Vacuum drying of temperature sensitive materials Vacuum drying of filter cakes and wet powders Chemical reactions such as alkalisation, crystallisation, etc. Wet agglomeration and granulation Sterilisation of products Homogenising under vacuum Cooling It is also possible to combine several processes in one vessel offering tremendous savings in investment cost, labour and space. SIZE & MODELS The Hosokwa CT Dryer is available in a range from 5 up to 6.000 liters. We offer specific design for: Secondary Pharmaceuticals Bulk pharmaceuticals Fine chemicals Food The Hosokawa CT dryers are designed and built according to requirements of the various coding authorities i.e. Stoomwezen, PED, TÜV, Lloyd's, ASME, Afnor, ISPLE etc and are available in all grades of Stainless Steel, Monel, Nickel, Hastelloy, etc. Special models or configurations are available upon request. TOLL PROCESSING & TESTING We can offer a range of contract processing facilities ranging from a single process up to multiple services comprising the following operations. - Batch Mixing Batch Agglomeration - Continuous Mixing Continuous Agglomeration - Batch Drying Milling & Classification - Continous Drying Densification & Packing Activities The above activities can be performed at several locations in the world Hosokawa Micron B.V. Doetinchem Holland Hosokawa Micron LTD Runcorn United Kingdom Hosokawa Micron GmbH Koln Germany Hosokawa Alpine Augsburg Germany Hosokawa Micron Summit Summit USA Hosokawa Bepex USA Minneapolis Hosokawa Micron Corp. Hirakata Japan Toll processing facility in Doetinchem Holland Our contract processing services can help you to develop your products and also other aspects are important: Materials for R&D purposes Process materials before installation of a new plant To make small batches for market testing To process materials which can not be made in clients facilities Products In our toll processing facility we can handle various products and we can adapt our equipment in accordance with your requirements. Handling and processing of: Food Ingredients and additives Chemicals Pharmaceuticals ( we have an isolated area and in USA an FDA approved facility) Minerals Detergents Others Equipment Mixers and Dryers and agglomeration and various other equipment is available to help you for testing and tolling of your products Contact us to get further information for toll processing and testing Processing station in Doetinchem Holland Vacuum Dryer (3500 ltrs) with Cyclomix Intensive Mixer Do you want more information? We would be pleased if you contact us: Hosokawa Micron B.V. Gildenstraat 26, P.O.Box 98, 7000 AB Doetinchem, The Netherlands, Tel. +31 314 373 532 Fax +31 314 373 491
