Optimization of structural parameters of drum type tea re-dryer

doi:10.3969/j.issn.1004-1524.2020.02.19

›› 2020, Vol. 32 ›› Issue (2): 348-358.DOI: 10.3969/j.issn.1004-1524.2020.02.19

• Biosystems Engineering • Previous Articles Next Articles

Optimization of structural parameters of drum type tea re-dryer

LI Weining¹, BAI Xuanbing¹, LI Bing^1,2,*

1. School of Engineering, Anhui Agricultural University, Hefei 230036, China;
2. State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei 230036, China

Received:2019-08-11 Online:2020-02-25 Published:2020-03-13

Abstract

Abstract: In order to solve the problems that the broken tea rate is too high and the quality of tea is affected by the drum type tea re-dryer during the roasting process, based on the theory of discrete element method, the three-dimensional geometric model of the drum type tea re-dryer was established by SolidWorks 2014, and the numerical simulation of the baking process was carried out by EDEM 2018. The movement of tea particles under different rotational speed and inclination angle of drum was studied, and the influence of rotational speed and inclination angle on the baking effect of tea was analyzed. The Lu’an Guapian was used as test material, the quadratic orthogonal rotation combination test was adopted, and the baking test of drum type tea re-dryer was carried out. The results showed that the structure parameters affecting the baking effect of the drum type tea re-dryer were rotational speed and the inclination angle of the drum. The parameters were optimized as rotational speed of the drum was 33 r·min^-1, and the inclination angle of the drum was 3.7 °. Under this condition, the broken tea rate was 6.7%, and the sensory score was 90.6, indicating the produced tea had good baking effect.

Key words: discrete element method, tea re-dryer, quadratic orthogonal rotation combination test, response surface

CLC Number:

S226.9

LI Weining, BAI Xuanbing, LI Bing. Optimization of structural parameters of drum type tea re-dryer[J]. , 2020, 32(2): 348-358.

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Optimization of structural parameters of drum type tea re-dryer

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