Research On The Treatment Of Cotton Seeds Based On Combined Microwave And Plasma Sterilization Technology

As an important component in agricultural production,cotton seeds have a significant impact on cotton yield and quality.Traditional methods of seed sterilization include chemical disinfection and heat treatment,but these methods can affect seed quality or cause pollution and harm to human health and the environment.Microwave and plasma sterilization technologies have the advantages of being pollution-free,fast,effective,and easy to operate.In this thesis,a microwave and plasma combined sterilization technique for cotton seeds is proposed,and a model of the microwave plasma cotton seed sterilization device is established.In this thesis,a waveguide slot antenna for seed microwave sterilization is designed,and the effect of parameters such as slot length,width,and distance from the centerline on the electric field strength and reflection coefficient of the slot antenna is explored through simulation analysis.The simulation results show that as the slot length increases,the reflection coefficient of the slot antenna decreases,as the slot width increases,the resonant point of the slot antenna gradually shifts to the right,and as the distance from the centerline to the slot increases,the reflection coefficient of the slot antenna decreases.As the slot length increases,the electric field strength above the slot shows an increasing trend;the slot width has little effect on the electric field strength of the antenna;and as the distance from the slot center to the centerline increases,the electric field strength of the antenna shows a decreasing trend.By studying the correlation between slot antenna reflection coefficient and electric field strength and slot parameters,the values of various parameters of the slot antenna are determined.Using finite element method,the reflection coefficient and electric field strength of the microwave sterilization device are analyzed,and the effect of physical properties of seeds on microwave sterilization is explored.