| Chamber filter press is a kind of intermittent operation equipment widely used in solid-liquid separation,and has been widely applied in petroleum,chemical engineer,metallurgy,mine and medicine industry.With the rapid development of industrialization,filter products currently has some disadvantages such as low filtration efficiency,low reliability,filter area small and great weight.So,in order to meet the needs of modemization,it is necessary to improve the structure of the filter press,The main research contents are as follows:(1)Structure principle and filtering mechanism of XAY160/1250-U type filter press was studied,Establishment of the design scheme of filter press.To calculate the force required of split plate,the motor power of board separating device is determined.Through the calculation of the pressing force,The pressure of the hydraulic cylinder is determined.Design and deflection,strength check of the filter plate,beam,head bracket and rear bracket,so theoretically verified the feasibility of the design.Solidworks was used to built filter press 3D parts and assembly modeling,and carries on the engineering drawing design.(2)Structural parameters design of the filter press filter plates,taking the volume of overall frame structure to be the lightest as the target,the finite element structural optimization was carried out on filter plate and selected a more ideal size.Compared with the results of the original dimension stress analysis,the maximum stress value decreased 25.4%,the minimum stress value decreased 15.8%,the displacement decreased 53.4%.Aimed at the problems of occurring cracks and fractures at the place of corners of tail bracket with beams and beams convex deformation too large in the course of using of chamber filter press.Established finite element mechanical model,Utilizing ANSYS software to carrying out finite element analysis on its overall framework and obtained the maximum stress and the maximum displacement.On the basis of in-depth analysis of the causes proposed the feasible solutions.Under the premise of normal operating conditions,taking the volume of overall frame structure to be the lightest as the target,the finite element optimization was carried out on overall framework of chamber filter press and selected a more ideal size based on the results.The comparison of overall framework after optimization with the structures of the original showed that the overall framework of the volume decreased 13.1%.(3)In order to observe the flow morphology and regularity of the slurry within filter chamber and ultimately improve the filtration efficiency,3D geometry model of filter chamber was built.By adopting center feeding,computational fluid dynamics(CFD)method was used to simulate the filtration process within the filter chamber of chamber filter press.With the established model,through the fluid simulation software FLUENT calculated the solid volume fraction increasing trend,velocity distribution cloud images,velocity vector images,filter cakes formation laws and pressure distribution cloud images within the filter chamber.Under every entrance velocity,of solid volume fraction growth rate of different particle size within the filter chamber was analyzed,and combined with the pressure size distribution within the filter chamber at different velocity,the appropriate entrance velocity was selected under higher filtration efficiency.By analyzing the velocity distribution cloud images and velocity vector images,the fluid flow state in the filter chamber and the impact on the filtration rate were obtained.By analyzing the formation and development laws of filter cakes,it can provide reference to better guide the practical work and improve the filtration efficiency of the filter press. |
PDF Full Text Request