基于CFD的汽化过氧化氢PET瓶坯灭菌过程流场分析  

Flow field analysis of vaporized hydrogen peroxide PET bottle preform sterilization process based on CFD

作　　者：石朴 许娜 邓立生 郑兆启 SHI Pu;XU Na;DENG Lisheng;ZHENG Zhaoqi(College of Mechanical Engineering,Tianjin University of Science and Technology,Tianjin 300222,China;Tianjin Electric Information College,Tianjin 300350,China;Guangdong Intelligent Filling Technology Co.,Ltd.,Foshan 528137,China)

机构地区：[1]天津科技大学机械工程学院,天津300222 [2]天津电子信息职业技术学院,天津300350 [3]广东智能灌装科技有限公司,广东佛山528137

出　　处：《包装与食品机械》2023年第2期48-52,共5页Packaging and Food Machinery

基　　金：广东省重点领域研发计划项目(2020B0202010004)。

摘　　要：为高效、快速、均匀地对PET瓶坯内部进行灭菌,设计一种针对PET瓶坯灭菌的汽化过氧化氢喷气装置。运用SolidWorks软件对瓶坯和喷气喷头建立模型;基于计算流体力学方法对PET瓶坯灭菌过程进行分析;通过对喷气喷头相距瓶坯底部不同位置和开孔位置与喷气喷头的距离进行模拟,比较短时间内过氧化氢气体在瓶坯内部的流场,得到喷气喷头与瓶坯最佳相对位置和喷气喷头最佳形状的优化参数。试验结果表明:在6 s的灭菌时间内,喷气喷头与瓶坯底部最佳距离为40 mm,开孔位置在距离喷气喷头上方35 mm处时,气体在瓶坯内部灭菌速度为0.9~1.2 m/s,内部流场较为均匀,灭菌效果较好。研究为瓶坯灭菌设备设计与优化提供参考。In order to efficiently,quickly and evenly sterilize the interior of PET preform,a vaporized hydrogen peroxide injection device for sterilization of PET bottle preform was designed.The SolidWorks software was used to model the bottle preform and air injection nozzle.Based on the computational fluid dynamics method,the sterilization process of PET bottle preform was analyzed.By simulating different positions of the air injection nozzle from the bottom of the bottle preform and distance of the opening position from the air injection nozzle,the flow field of hydrogen peroxide gas inside the bottle preform in a short time was compared,and the best relative position of the air injection nozzle to the bottle preform and the best shape of the nozzle were obtained.The test results show that:in the sterilization time of 6 s,the optimal distance between the air injection nozzle and the bottom of the bottle preform is 40 mm,and when the opening position is 35 mm above the air injection nozzle,the sterilization speed of the gas inside the bottle preform is 0.9~1.2 m/s,the flow field in the bottle preform is relatively uniform,and the sterilization effect is good.The research can also provide a reference for the design and optimization of sterilization equipment for bottle preform.

关 键 词：PET瓶坯 汽化过氧化氢 计算流体力学 灭菌过程 结构优化 

分 类 号：TS203[轻工技术与工程—食品科学]