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ECN publication
Thin Film Drying Processes; Energy- and economic aspects compared to spray drying
Published by: Publication date:
ECN Biomass & Energy Efficiency 1-6-2017
ECN report number: Document type:
ECN-E--17-084 ECN publication
Number of pages: Full text:
36 Download PDF  

This report gives a systematic comparison of the energy consumption and the investment- and energy costs for a conventional spray dryer in comparison to three conductive thin film drying processes. The evaluated thin film drying processes are: vacuum drum drying, agitated thin film drying and refractance window drying. The comparison is carried out for a drying capacity of 500 kg water/h by evaporation. Taken all boundary conditions into account, it is concluded that for the evaluated conductive thin film drying processes a reduction in primary energy (15% to 35%), capital costs (45% to 65%) and operational costs (37% to 50%) can be expected.

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