Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 512368
Title Energy efficient powder production by closed-loop spray drying
Author(s) Moejes, S.N.; Visser, Quirien; Boxtel, A.J.B. van
Source In: Proceedings IDS2016, 20th International Drying Symposium, August 7-10 2016, Gifu, Japan. -
Event 20th International Drying Symposium, Gifu, 2016-08-07/2016-08-10
Department(s) Biobased Chemistry and Technology
Publication type Contribution in proceedings
Publication year 2016
Keyword(s) Spray drying, monodisperse droplet, air dehumidification, pinch analysis, system optimization.
Abstract Closed-loop dryers are able to reduce the energy consumption in milk powder production up to 60% compared to current practice. Application of monodisperse droplet atomizers eliminates the presence of fines in the exhaust air of spray dryers. It allows the recirculation of the exhaust air over the dryer and the recovery of latent heat. For recirculation, the air is dehumidified with a membrane contactor using saturated salt solutions, or a zeolite system. During dehumidification heat is released while energy is needed for regeneration of the adsorber. By heat integration of the adsorber-regenerator system with the dryer or a related process, a significant improvement of energy efficiency can be achieved. In this work we present four configurations for closed-loop spray drying. For each system simultaneous optimization of the operational conditions and the heat exchanger network is applied for optimal energy recovery. The results for milk powder production showed that, compared to the current practice, simultaneous optimization for closed-loop dryer system results in a reduction of energy consumption from 38% up to 62%.
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