Study on Drying Kinetics of Paddy Rice: Intermittent Drying

被引:0
|
作者
Golmohammadi, Morteza [1 ,2 ]
Foroughi-dahr, Mohammad [1 ]
Rajabi-hamaneh, Mehdi [1 ]
Shojamoradi, Ali Reza [1 ]
Hashemi, Seyed Jalaledin [1 ,3 ]
机构
[1] Univ Tehran, Coll Engn, Sch Chem Engn, POB 11365-4563, Tehran, Iran
[2] Tarbiat Modares Univ, Fac Chem Engn, POB 14115-143, Tehran, Iran
[3] McGill Univ, Dept Chem Engn, Pulp & Paper Res Ctr, Montreal, PQ, Canada
来源
IRANIAN JOURNAL OF CHEMISTRY & CHEMICAL ENGINEERING-INTERNATIONAL ENGLISH EDITION | 2016年 / 35卷 / 03期
关键词
Intermittent drying; Drying model; Effective moisture diffusivity; Paddy rice; Tempering; Statistical analysis; BED; KERNELS; HEAT;
D O I
暂无
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The intermittent drying characteristics of an Iranian popular paddy rice variety were experimentally investigated to determine the drying kinetics and obtain the effective moisture diffusivity. A lab-scale fluidized bed dryer was designed and constructed to enable obtaining the required results while controlling critical drying parameters. The effects of drying temperature and tempering period on drying kinetics and moisture diffusivity were studied. The results showed a significant effect on drying performance and effective moisture diffusivity by adding tempering stage. Drying rate improved sharply by implementing the tempering stage, increase of drying air temperature as well as the tempering duration. Several thin layer drying models were fitted separately to experimental data of each drying stages namely pre-tempering and post-tempering and suitability of these models were examined using the statistical analysis. The Midilli and Tow-Term model were found to be the most appropriate one for the first and second drying stages, respectively.
引用
收藏
页码:105 / 117
页数:13
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