基于农药热力烟化雾化机理研究的可视化测试装置

Graphical test device for mechanism research of thermodynamical fuming and atomization of pesticide

烟雾载药防治技术具有防效高、用药省、无需用水等显著优点,广泛应用于农林病虫害的快速防治。目前国内外对该技术的研究大都停留在热力烟化后的效果层面上,而对热力烟化雾化过程及机理缺乏深入认识、相关测试装置十分匮乏。因此,笔者在现有热烟雾机热力烟化技术基础上,采用高纯度耐高温石英材料,研制出用于农药热力烟化雾化机理研究的可视化测试装置,实现了对油溶剂或水基型农药热力烟化雾化中破碎、裂化、蒸发及冷凝形成雾滴的过程的可视化研究,以及对雾滴粒径、热力烟化雾化管轴向温度和压力及其出口气流速度分布的测试,从而为农药热力烟化雾化机理的探讨提供方法和依据。

Thermal fogging of pesticide is a pest control technique with the benefits of high efficiency,low chemical consumption and no water consumption.Previous studies on this technology were mainly on the pest killing effects.The understanding of the thermodynamical fuming and atomization process is still limited and the corresponding test device hard to find.Based on the thermodynamical atomization technology of current thermal fogger,a new graphical test device for the mechanism research of thermodynamical atomization and fuming of pesticide was developed,the process of breaking,cracking,evaporation and condensation of the pesticide could be visually observed,and droplet size,axial temperature,axial pressure and exit flow velocity distribution of the exhaust pipe could also be tested.Thus,theoretical and practical guide for mechanism research of thermodynamically atomization could be provided.