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Press release: Complex powders made easier
A new tool makes it now possible to predict the features of complex powder as a function of the process and product configuration. A network of scientists in Europe, coordinated by NIZO food research, are developing a ‘design tool’ to establish relations between the configuration of the drying installation (geometry, nozzle selection), process conditions, product composition and final powder properties. Spray drying is used for the manufacture of many consumer and industrial products. During spray drying, agglomerates of powder particles are formed which determine the instant properties of the powder. Agglomeration during spray drying is considered to be a difficult process to control. As a consequence, agglomeration during spray drying is operated by trial-and-error. In 2001 an EC-sponsored project started with the aim of developing an industrially validated (computer) model, using CFD technology, to predict agglomeration processes in spray drying machines. This project, initiated and co-ordinated by NIZO food research, is titled EDECAD (Efficient DEsign and Control of Agglomeration in spray Drying machines, www.edecad.com). The main result of the project will be an industrially validated design tool enabling control of instant properties and bulk density of powders through configuration of the drying installation. This allows the industry to target powder agglomeration for complex powders such as baby foods and ingredients for diet and sport foods. Although developed for food, translation to non-food applications is possible and the non-food industry has already shown interest. The project is expected to finish at the beginning of 2004. On 12 November 2003 a workshop will be organized within the framework of the EDECAD project. The aim of the workshop is to present relevant project results to the industry. A general introduction on spray drying and the background of the EDECAD project will be given. The academic partners will present their experimental and modelling results, including details on the measurement techniques used. Also the general structure of the design tool and the way it can be used in practice will be explained. Finally, es-spraydry, a user-friendly tool for CFD calculations in spray dryers, will be demonstrated. This workshop can be attended after invitation only. See also: www.nizo.com For more information: edecad@nizo.nl |
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