卷曲形绿茶自动化加工生产线设计与参数优化

Design and Parameter Optimization of Automatic Processing Production Line for Curly Green Tea

以国产茶叶加工设备为主体,设计、选配和组建了卷曲形绿茶自动化标准化加工生产线,采用一芽二叶茶鲜叶原料,优化提出了关键加工工序参数;以传统炒青绿茶及工艺为对照,比较新生产线所制卷曲形绿茶的感官、色泽和理化品质、工艺特点和加工成本。结果发现:自动化生产线以生物质颗粒为燃烧热源,集成了自动摊放与称量、热风滚筒解块和循环滚炒等技术,实现了全程自动化加工,提高了茶叶的滋味和色泽品质,所制卷曲形绿茶的感官品质得分比传统炒青绿茶高3分,酚氨比相对较低(P<0.05),干茶的色相值、茶汤、叶底的亮度和色相值相对更好(P<0.01);该生产线日均可加工1200 kg绿茶,能耗成本为1.3~1.4元/kg干茶,相比传统单机加工设备,用工成本减少80%。该生产线提高了茶叶品质,降低了生产成本,为卷曲形绿茶标准化加工和品质提升提供参考。

The automatic standardized processing production line for curly green tea was designed,selected and set up by taking the demestic tea processing equipment as the main body.The key processing parameters were optimized by using the raw materials of fresh tea leaves with one bud and two leaves.The sensory quality,color,physical and chemical quality,technological characteristics and processing cost of curly green tea produced by the new production line were compared with the traditional roasted green tea and its technology.The results showed that the automatic production line took biomass particles as the combustion heat source,integrated automatic spreading and weighing,hot-air cylinder deblocking and circular rolling frying,realized the whole process of automatic processing,improved the taste and color quality of tea,the sensory score of the curly green tea was 3 points higher than that of the traditional roasted green tea,the phenol ammonia ratio was relatively low(P<0.05),the color value of dry tea,the brightness and color value of soup and brewed leaves were better(P<0.01);the production line could process 1200kg green tea per day,and the energy consumption cost was 1.3-1.4 yuan per kg dry tea,the labor cost was reduced by 80%compared with the traditional single machine processing equipment.The production line improves the quality of tea,reduces the production cost,and provides guidance for the standardized processing and quality improvement of curly green tea.