Separation Mechanism Of A Dust Separator In Electric Decontamination Vehicle-borne Air Dust Separator And Its Parameters Optimization

With the rapid development of China’s industry and the increasing emissions of automobile exhaust,the outbreak of haze has become more frequent,and the issue of air pollution and haze has attracted more and more attention.The composition of smog is more complex.The main harmful substances are respirable particles and carbon oxynitride.The double-entrance straight-cut cyclone separator is a device for removing particulates in the atmosphere.It has the advantages of simple structure,high dust removal efficiency,and no secondary pollution.It can be mounted on electric vehicles as a new type of removal of fine particles in the atmosphere.Therefore,this article takes the electric deduplication vehicle-mounted dual-entry straight-cut cyclone separator as the research object,through the comparison of different structures and numerical calculation methods,analyzes the flow field characteristics of the electric deduplication vehicle-mounted separator,based on the initial model.The separation characteristics of the separator were simulated and analyzed,and orthogonal experiments were used to optimize the separation characteristics of the initial model.The main work contents and innovations of the thesis are as follows:(1)For the different configurations of the single inlet and double inlet of the separator,numerical calculations were performed under different numerical calculation methods to obtain the flow field characteristics of the separator at different inlet numbers and the velocity fields of the separators at different inlet numbers were analyzed.And Through comparative analysis of different numerical calculation methods,a better numerical simulation method for dual inlet separator is obtained.(2)A structure size is designed to meet the use of double-entry cyclones mounted on electric vehicles,and the model gas-solid phases are simulated.The flow field characteristics and turbulence structure characteristics of the double inlet separator in gas phase are analyzed.The separation characteristics and pressure drop characteristics of the gas-solid two-phase model of the initial model.(3)The four structural parameters affecting the separation characteristics of the double inlet direct-cut separator were analyzed by orthogonal test method:exhaust pipe diameter D,exhaust pipe depth S,cylinder length,intake inlet width B.The results show that the depth of the exhaust pipe and the width of the air inlet have the most significant influence on the separation efficiency.The main factor is the effect of the diameter of the exhaust pipe,and the effect of the length of the cylindrical pipe on the separation characteristics and pressure drop characteristics is the smallest.,The other three factors have a greater impact on pressure drop characteristics.Through calculation and analysis of the optimal model under different working conditions,it was found that the inlet velocity has a greater influence on the separation characteristics and pressure drop characteristics of the double inlet separator.The particle diameter has a greater influence on the separation characteristics of the separator but the pressure characteristics have no obvious effect.,The particle concentration is not obvious in the separation characteristics and pressure characteristics within a certain range.