烘干机温度PID控制系统及大红袍烘焙效果试验

doi:10.13305/j.cnki.jts.2014.06.016

Abstract

Abstract: This paper described the structure and principle of the temperature PID control system of dryer, and Dahongpao refined baked application experiment was carried out. The results showed that: When the set temperature is 180℃, the average air temperature is controlled at 181.9℃ by the PID system, and the average air temperature controlled by manual is 188.9℃, the baking temperature controlled by PID control system is more stable than manual control, and coal saving rate is about 22.97%-26.83%. In the two different quality levels of Dahongpao, tea polyphenols in the tea drying controlled by the PID and the manual are reached significant level, the amino acid of first-class Dahongpao reached very significant level, the amino acid and soluble sugar of secondary class Dahongpao reached significant level. The average tea quality scores under temperature PID control is higher than that of manual control.

Key words: dryer, temperature, PID control, Dahongpao tea

CLC Number:

WEI Shiqin, JIN Xinyi, HUANG Jiachun, HAO Zhilong, OUYANG Jingsheng, LIN Jie. The Temperature PID Control System of Dryer and Its Application on Dahongpao Baking[J]. Journal of Tea Science, 2014, 34(6): 557-564.

References 14

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The Temperature PID Control System of Dryer and Its Application on Dahongpao Baking

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