Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Evaluation of a Direct Granulation Method for Liquid Materials with a Fluidized Bed Granulator [Translated]†
The authors propose a new granulation technique employing a spray fluidized bed granulator that directly produces granules from liquid materials. Instant coffee dissolved in water was used as the liquid material. In order to elucidate the agglomeration mechanisms in the granulator, changes in the physical properties of granules were measured at various liquid material feed rates. We proposed an index R that is related to the liquid feed rate and is capable of quantitatively evaluating the conditions of drying in the granulator. Experimental results showed that granule formation depends on the R value in accordance with the following three mechanisms: 1) generation of fine particles by the spray drying effect, 2) agglomeration of fine particles, and 3) layering of fine particles onto the surface of individual agglomerates. Spherical granule products with high bulk density were obtained especially with layering granulation in a stable fluidized bed. Further, an equation derived from the mass balance for coffee solids in the granulator accurately described the growth of granules during layering granulation.† This report was originally printed in J. Soc. Powder Technology, Japan. 36(5), 368-377 (1999) in Japanese, before being translated into English by KONA Editorial Committee with the permission of the editorial committee of the Soc. Powder Technology, Japan.
Evaluation of a Direct Granulation Method for Liquid Materials with a Fluidized Bed Granulator [Translated]†
The authors propose a new granulation technique employing a spray fluidized bed granulator that directly produces granules from liquid materials. Instant coffee dissolved in water was used as the liquid material. In order to elucidate the agglomeration mechanisms in the granulator, changes in the physical properties of granules were measured at various liquid material feed rates. We proposed an index R that is related to the liquid feed rate and is capable of quantitatively evaluating the conditions of drying in the granulator. Experimental results showed that granule formation depends on the R value in accordance with the following three mechanisms: 1) generation of fine particles by the spray drying effect, 2) agglomeration of fine particles, and 3) layering of fine particles onto the surface of individual agglomerates. Spherical granule products with high bulk density were obtained especially with layering granulation in a stable fluidized bed. Further, an equation derived from the mass balance for coffee solids in the granulator accurately described the growth of granules during layering granulation.† This report was originally printed in J. Soc. Powder Technology, Japan. 36(5), 368-377 (1999) in Japanese, before being translated into English by KONA Editorial Committee with the permission of the editorial committee of the Soc. Powder Technology, Japan.
Evaluation of a Direct Granulation Method for Liquid Materials with a Fluidized Bed Granulator [Translated]†
Hiroyuki Tsujimoto (Autor:in) / Toyokazu Yokoyama (Autor:in) / Isao Sekiguchi (Autor:in)
2014
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
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An investigation on process of seeded granulation in a continuous drum granulator using DEM
| British Library Online Contents | 2017