Structure Development And Performance Research Of Guide Vane Cyclone Separator

Multi-tube cyclone separators are often used in catalytic cracking equipment to separate and collect particulate matter in high-temperature gas.However,in actual production,this type of cyclone separator often encounters clogging of the dust outlet and erosion of the cone wall,which indirectly leads to the flue gas turbine.Faults such as blade fouling and vibration.Therefore,this paper uses numerical simulation to study the relationship between the structure parameters of the axial flow guide vane cyclone and the flow field performance,and proposes a reasonable single-tube cyclone structure parameter scheme,and considering the degree of influence of structural parameters on the flow field,combined with orthogonal experiment method and intuitive analysis method,output the single-tube structural parameter scheme,by comparing the two optimization schemes,a single-tube cyclone separator with high separation efficiency,low pressure loss,compact structure and less abrasion is obtained,and apply this model in the multi-tube separator to discuss the influence of flue gas parameters on the flow field of the multi-tube separator.The specific research content is as follows:(1)Build a calculation model,use Catia software to build a single-tube separator model;Complete flow field extraction,meshing and other tasks in Ansys software;Numerical calculation of the gas-solid two-phase flow field in the cyclone is performed by Fluent,the Reynolds Stress Model is selected for the gas phase,and the Discrete Phase Model is selected for the solid phase;Analyze the pressure distribution and velocity distribution of the flow field under the reference structure.(2)Discuss the relationship between geometric structure parameters and flow field performance indicators,and study the effects of the number of blades,blade drainage angle,blade height,and cone angle of the inner tube on the flow field pressure loss,tangential velocity,and separation efficiency.Obtain the change rule of performance index with each structural parameter,and output the optimization model based on single variable method.(3)To study the degree of influence of structural parameters on the performance indicators of cyclone separators,the orthogonal test method was used to establish a 4-factor 4-level orthogonal test table,and the response values of 16 orthogonal test combinations were obtained.Through the intuitive analysis method,analyze the response values of pressure loss and separation efficiency,and get the values of K,K,R in each column.Combine the mean value K and extremum R,summarize the degree of influence of each factor on the performance index,the relationship between each factor and the change of the performance index,and output the optimization model based on the orthogonal method.The two optimization models are compared and analyzed for velocity distribution,pressure loss,erosive wear and particle movement trajectory.The best optimized parameters are 10 blades,45 mm blade height,the drainage angle of 30°,and the cone angle of 7.5°.(4)The influence of flue gas parameters on the multi-tube separator were studied.Connect24 single-tube separators in parallel to form a multi-tube cyclone separator to analyze the uniformity of single-tube air intake in the regenerator,and the influence of flue gas parameters such as air intake,and particle concentration on the internal flow field of the regenerator.