Design And Research Of Separator For Cement Pneumatic Ship Unloader

As construction needs continue to increase,insufficient efficiency of cement unloading,Leading to the current port unloading takes up a lot of time and space,and often the environment is polluted,the main reason is the inefficient efficiency of cement and air separation.In order to improve the unloading efficiency of the cement separator,it is necessary to design a separator of reasonable structure and size,and it can meet the unloading efficiency requirements and the green environmental protection concept.In this paper,by querying the development status of separators at home and abroad,the mechanical analysis of cement particles in the separator is carried out,and the influencing factors of cement particle movement are obtained.For these influencing factors,the numerical simulation method of Euler gas-solid two-phase flow separation model was carried out by means of ANSYS Fluent software.The separator inlet size,inlet shape,number of inlets,inlet symmetry,cylinder diameter,vertical part of the cylinder and cone were investigated.The influence of the height ratio of the shape part and the inclination angle of the conical part of the cylinder on the amount of cement particles in the separator,the escape and return of the outlet,the stability of the flow field and the trajectory of the movement.Concluded as follow:(1)In the gas-solid two-phase separation of fine particles such as cement particles,the cyclone separation can reasonably utilize the two-phase fluid movement in the separator to separate and move,and the efficiency is generally better than other methods.(2)Under the conditions of the inlet flow rate and the same cylinder size,the separation efficiency of the separator is related to the inlet size,the inlet shape,the number of inlets,and the inlet symmetry.The separator has better performance,more stable flow field,more mixed flow and escape particle volume under the condition that the inlet axial width is 0.4m,the radial width is 0.25 m,the inlet flow velocity is 10m/s,and the double inlet axis is symmetrically distributed.Less,separation efficiency is higher.(3)Under the conditions of the same inlet flow rate and the same size,the separation efficiency of the separator is related to the diameter of the cylinder,the height ratio of the vertical part and the conical part of the cylinder,the inclination angle of the conical part of the cylinder,etc.,but the stability of the flow field Sexual influence is small.The larger the diameter of the cylinder is not conducive to the precipitation efficiency of theparticles.The diameter of the cylinder is smaller and the escape amount of the outlet particles is larger.The higher the height ratio,the lower the separation effect.The smaller the height ratio,the larger the escape amount of the outlet particles;the reasonable range increases.The angle of inclination of the cone of the cylinder is beneficial to improve the separation effect and reduce the back-feed phenomenon.Based on these influence laws,a separator with reasonable structure and size was designed.Combined with numerical simulation results,the designed separator meets the design requirements of high port efficiency,small space occupation and green environmental protection.