Coordination of distinctive pesticide adjuvants and atomization nozzles on droplet spectrum evolution for spatial drift reduction  

作　　者：Shidong Xue Jingkun Han Xi Xi Zhong Lan Rongfu Wen Xuehu Ma 

机构地区：[1]State Key Laboratory of Fine Chemicals,Liaoning Key Laboratory of Clean Utilization of Chemical Resources,Institute of Chemical Engineering,School of Chemical Engineering,Dalian University of Technology,Dalian 16024,China [2]School of Fashion and Textiles,The Hong Kong Polytechnic University,Hong Kong 999077,China [3]China Tianchen Engineering Corporation,Tianjin 300400,China [4]School of Energy and Power Engineering,Dalian University of Technology,Dalian 116024,China

出　　处：《Chinese Journal of Chemical Engineering》2024年第2期250-262,共13页中国化学工程学报（英文版）

基　　金：financially supported by the National Key Research and Development Program of China(2017YFD0200304)。

摘　　要：Pesticide adjuvants,as crop protection products,have been widely used to reduce drift loss and improve utilization efficiency by regulating droplet spectrum.However,the coordinated regulation mechanisms of adjuvants and nozzles on droplet spectrum remain unclear.Here,we established the relationship between droplet spectrum evolution and liquid atomization by investigating the typical characteristics of droplet diameter distribution near the nozzle.Based on this,the regulation mechanisms of distinctive pesticide adjuvants on droplet spectrum were clarified,and the corresponding drift reduction performances were quantitively evaluated by wind tunnel experiments.It shows that the droplet diameter firstly shifts to the smaller due to the liquid sheet breakup and then prefers to increase caused by droplet interactions.Reducing the surface tension of sprayed liquid facilitates the uniform liquid breakup and increasing the viscosity inhibits the liquid deformation,which prolong the atomization process and effectively improve the droplet spectrum.As a result,the drift losses of flat-fan and hollow cone nozzles are reduced by about 50%after adding organosilicon and vegetable oil adjuvants.By contrast,the air induction nozzle shows a superior anti-drift ability,regardless of distinctive adjuvants.Our findings provide insights into rational adjuvant design and nozzle selection in the field application.

关 键 词：Pesticide drift Spray droplets Particle size distribution Spray atomization Transport processes ADJUVANTS 

分 类 号：TQ450.1[化学工程—农药化工]