Analysis And Optimization Of Structure Parameters Of Gas-solid Two-phase Flow Self-circulation Dust Suppression And Dust Removal Device

Thermal power generation companies,wharves,mines,steel mills,etc.generally use belt conveyors to unload bulk materials into storage bins,which have the advantages of efficient and continuous transportation and have been widely used.The bulk material falling along with the transfer gap produces a large amount of impact dust spilling,which not only pollutes the environment,poses a safety hazard,but also seriously endangers human health.Therefore,the design of a low-energy,high-efficiency transport and dust removal equipment has become one of the important topics studied by experts and scholars in related fields.This paper analyzes and optimizes the design of the blanking pipe and the return pipe of the gas-solid two-phase flow self-circulating dust suppression and dust removal device,and suppresses the dust generated in the material transportation process from multiple angles.The main research content is divided into the following parts:Combining the existing transport and dust removal equipment,according to related design books,proposes the transformation plan of the curved blanking pipe and the return pipe,and uses Solid Works to carry out the three-dimensional modeling of the gas-solid two-phase flow self-circulating dust suppression and dust removal device.The Discrete Element Method(DEM)is used to analyze the coal flow velocity at the outlet of the blanking tube under different parameters,and the influence law of the outlet angle and particle size of the different curved blanking tube on the coal flow outlet speed is obtained,and the type of the curved blanking tube is determined.Using the CFD-DEM coupling simulation method,the velocity of the gas phase at the outlet of the upper end of the curved blanking tube was analyzed.On the basis of determining the curve blanking pipe,the lower half of the intercepting device establishes a three-dimensional model of the dust suppression and dust removal structure,and uses the method of Computational Fluid Dynamics(CFD)to analyze the return effect of the return pipe under different structural parameters.The constructed three-dimensional model is meshed,and its internal flow field is simulated by Fluent software;the diameter of the return pipe,the angle of the return pipe,the height of the expansion area connected to the return pipe,the center of the return pipe and the blanking pipe are analyzed by the single variable method Four structural parameters such as distance are studied on the recirculation effect,and the influence of different parameters on the recirculation effect is analyzed.Finally,by designing an orthogonal test table,combined with CFD simulation to analyze the recirculation effect of different structural parameter combinations,determine the optimal structure parameter combination;use FLUENT simulation analysis to obtain the recirculation effect of the optimal structural parameters and the dust concentration at the outlet,and compare,analyze and optimize The dust emission concentration of the front and rear dust removal devices.