摘要
针对目前热风滚筒杀青机热能利用率不高、杀青质量和产量受到限制的问题,对热风杀青过程中滚筒转速、导叶板数量、导叶板高度、导叶板宽度以及热风进风口结构对杀青质量的影响展开了研究,利用EDEM与FLUENT联合对离散场、流场和温度场进行了耦合分析,在所构建的模型上对杀青过程进行了数值模拟。并在结合工程实践基础上对目标机型进行了导叶板数量的增加和将进风口由内凹改为外凸的优化;研究结果表明,滚筒转速和导叶板数量对茶叶颗粒温升速率有较大影响,进风口结构对滚筒内温度场有较大影响,优化后的目标机型在提高杀青质量的情况下,产能提高约25%,采用的多相流耦合分析方法也可用于多种茶叶加工装备的开发与优化。
Aiming at solving low utilization rate of heat energy and improving the quality and quantity of tea, specific model of tea hot-air cyl- inder dryer was studied. The approach of combining EDEM and FLUENT was used to analysis the discrete field, flow field and temperature field during the de-enzyme process, and to study the impact of roller speed, the number of shovelling plate, the width and height of shovel- ling plate and the structure of hot-air inlet on quality of tea. In combination with engineering practice, the target machine was optimized by increasing the number of shovelling plate and changing the air inlet from concave to convex. The results indicate that, the rate of temperature rise of tea and the temperature field in the cylinder are influenced by the roller speed, the number of shovelling plate and the structure of hot- air inlet. The optimized machine can improve the quantity of tea by 25% , while improving the quality of tea. The method of multiphase flow coupling can also be used to develop and optimize a variety of tea processing equipments.
出处
《机电工程》
CAS
2015年第8期1050-1055,共6页
Journal of Mechanical & Electrical Engineering
基金
"十二五"国家科技支撑计划项目(2014BAD06B06)
国家自然科学基金资助项目(31201138)
