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EFFECT OF DRYING ON FLUIDISATION BEHAVIOUR OF PACKED BEDS OF SHREDDED COCONUT

 

作者: W.J.N. Fernando,   T. Thangavel,  

 

期刊: Drying Technology  (Taylor Available online 1987)
卷期: Volume 5, issue 1  

页码: 51-62

 

ISSN:0737-3937

 

年代: 1987

 

DOI:10.1080/07373938708916528

 

出版商: Taylor & Francis Group

 

关键词: Area of cross-section of the bed;channeling;moisture content (dry basis);piston flow;pressure drop;solids transport;weight of dry material of the bed

 

数据来源: Taylor

 

摘要:

Drying of shredded coconut is usually carried out commercially in order to facilitate storage over reasonable periods of time and to obtain advantages of reduction of weight and volume in transport and packaging. Fluidised bed drying of materials is generally accepted to be an efficient method of drying. Experiments were carried out to investigate the behaviour of fluidisation of shreddet coconut at various moisture contents. The pressure drop was measured across random packings of shredded coconut. It is seen that shredded coconut does not fluidise easily at moisture contents greater than 0.55 (55 weight percent moisture). It is also seen that fluidisation can be easily achieved by drying shredded coconut to moisture contents between approximately 0.25 to 0.55. The pressure drop characteristics within this region is seen to closely resemble the theoretical behaviour of a fluidised bed. It is also seen that particles of shredded coconut in beds of moisture contents less than 0.25 tend to undergo pneumatic transport if efforts are made to fluidise such beds.

 

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