Research On Energy Efficiency Optimization And Electrostatic Control Technology Of Airflow Vibration Drying Process Of Particulate Materials

Airflow vibration drying equipment uses hot airflow and vibration to continuously dry and produce water-containing particulate materials.The dual effects of hot airflow and vibration can effectively improve the drying efficiency of particulate materials.In the process of air vibration vibration drying of granular materials,static electricity will accumulate due to friction and collision between the granular materials and between the materials and the wall of the drying equipment,causing hidden dangers in production safety.In this study,air-flow vibration drying of particulate materials after hydraulic transportation is carried out,and the efficiency improvement method and drying energy optimization plan in the process of air-flow vibration drying of particulate materials are studied.Using theoretical analysis,experimental verification,numerical simulation and other methods to carry out research on the division of process stages,the drying characteristics of granular materials,the state of motion,and electrostatic control.Completed the prototype design and verification of the airflow vibration drying equipment.The main contents are:(1)Through theoretical analysis,divide the drying process of hydraulically conveyed granular materials into stages and optimize the process flow.By setting the solid-liquid separation process,the moisture content of the material entering the air vibration vibration drying device is reduced and the drying process parameters are optimized.In order to improve the efficiency of solidliquid separation,the effects of hydraulic conveying conditions,solid-liquid separation screen structure,vibration parameters,etc.on the solid-liquid separation efficiency,material movement status and changes in moisture content are analyzed.The design scheme of double-layer foldback solid-liquid separation device is proposed to improve the efficiency of solid-liquid separation and complete the verification of the design prototype.(2)In order to improve the drying efficiency of materials,study the influence of hot air parameters and vibration parameters on the drying efficiency of materials.Analyze the vibration parameters on the movement state of the granular material in the drying device,and use the method of theoretical analysis and experimental verification to study the vertical throwing motion and the horizontal conveying speed of the material.Optimize the material movement process under the vibration condition,improve the drying efficiency,and optimize the design of the air-flow vibration drying device.(3)In order to improve the energy efficiency of the drying process and reduce energy loss,research the factors affecting energy consumption.The methods of theoretical analysis and experimental verification are used to conduct research on hot air parameters,energy circulation,wind speed distribution,vibration and thermal coupling,etc.A scheme for reducing energy consumption based on the minimum fluidization wind speed is proposed,and the structure of the air equalization plate is optimized.Energy consumption calculation and energy efficiency optimization for air vibration drying process.(4)Analyze the influence of material moisture content,hot air temperature,vibration frequency,material layer thickness,etc.on the accumulation of static electricity during the air vibration drying process,and study the application of dust fine particles and ion wind electrostatic control technology.