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Closed-cycle drying of solids
KTH, School of Chemical Science and Engineering (CHE), Chemical Engineering and Technology, Transport Phenomena. (Drying & Process Technology)
1996 (English)In: Drying Technology, ISSN 0737-3937, E-ISSN 1532-2300, Vol. 14, no 5, 1041-1062 p.Article in journal (Refereed) Published
Abstract [en]

The influence of the recovery system and other system parameters upon drying selectivity was studied in a closed-cycle dryer. A continuously-worked unit consisting of a single stage dryer and a ondenser was simulated. In the dryer, a thin solid wetted with a liquid mixture was dryed in contact with an inert gas flowing either parallelly or as an impinging jet Partial recycle of the exhaust gas was allowed. Two recovery systems were studied, a scrubber condenser and an indirect condenser. Both drying and condensation were described by a mathematical model considering a s-phase-controlled process. The inlet liquid composition in the scrubber condenser has the greatest influence on drying selectivity. Degree of vapour recovery, recycle ratio and other operational parameters ffect selectivity and equipment dimensions in a variable extent. The combined use of these variables constitutes a powerful method to control selectivity. The present models may be useful to aid the optimization of the system with regard to product quality in gas-phase-conirolled processes.

Place, publisher, year, edition, pages
1996. Vol. 14, no 5, 1041-1062 p.
Keyword [en]
closed-systems, condensation, multicomponent drying, selectivity
National Category
Chemical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-102099DOI: 10.1080/07373939608917139OAI: oai:DiVA.org:kth-102099DiVA: diva2:550818
Note
NR 20140805Available from: 2012-09-08 Created: 2012-09-08 Last updated: 2017-12-07Bibliographically approved

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