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《Journal of Jimei University(Natural Science)》 2010-02
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Preliminary Drying Experiments on Tubular Incense Employed Closed Air Drying Cycle

ZHENG Qing-rong,CAI Zhen-xiong,WANG Ji,PAN Qi-yong(Institute of Marine Engineering,Jimei University,Xiamen 361021,China)  
Analyses were carried out to accurately locate the optimum working condition for tubular incense drying.A closed air drying cycle was employed to set up an experimental unit,about 1.2 kg tubular incense in length of 0.97 m and diameter 0.025 m was then selected for comparatively drying tests under different initial water contents,heating rates,drying temperatures as well as circulating velocities of the drying air.Results showed that the drying characteristics of the incense were similar to those of timber,and the heating rate was the most important factor in bending or cracking of incense.Results also revealed that optimization matching on the working condition of the drying air should be undertaken to improve the drying quality,and for the tested sample with an initial water content about 66.08 %,a better quality of the product incense could be achieved under a drying temperature in range of 45~50 ℃ with a circulating velocity and heating rate of the drying air respectively less than 1.7 m/s and 0.22 ℃/min.Conclusions were drawn that selection of the working condition for tubular incense drying should be based on the optimization matching results from experiments and dynamic modeling.
【Fund】: 福建省科技廳資助項目(2009J10101);; 福建省高等學校新世紀優秀人才計劃支持項目(C14294);; 福建省教育廳資助項目(JA08148)
【CateGory Index】: TS971
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