Design Simulation Optimization And Application Research Of Exhaust Gas Purification System Of Sintering Machine Tail Based On BIM Model

With the improvement of environmental protection requirements and sintering efficiency of iron and steel enterprises in China in recent years,key iron and steel enterprises in China have embarked on the sintering transformation.Small sintering machines with poor environmental protection and high energy consumption will be replaced by sintering units with more mature technology and larger area per machine.Accordingly,the required pipe network system also becomes more and more complex,which brings great difficulties to designers.The efficiency of traditional CAD design is low and the resumption of work is serious.In the process of operation,it is very easy to occur the problem of pipeline air flow imbalance,resulting in poor collection effect of pipeline network,easy to cause dust accumulation in pipelines,leading to the waste of energy and aggravating pipeline wear.At present,the traditional adjustment methods for pipeline imbalance mainly have the problems of long debugging cycle and high cost.In this paper,on the basis of related literature at home and abroad,in view of the sintering machine tail pipe network on the problems existing in the design and operation,put forward the modeling method based on BIM(Building Information Modeling)technology,numerical simulation method,and combined with FLUENT precision modeling of large centralized network,effectively improve the imbalance in the resistance of pipelines and improve the energy efficiency.In this paper,BIM technology is adopted to model the dust removal pipe of sintering machine tail in a 500m~2 sintering plant,and CFD method is adopted to analyze the 3d model,so as to realize the connection between architectural design software and physical analysis software.The original design flow field was analyzed,and the pipe network structure was optimized by adding throttle valve in the pipe,and the following results were finally obtained:(1)The pipeline was modeled by Revit software,and the 3D model was analyzed by using CFD method,which realized the connection between engineering design software and CFD analysis software,and provided a new method for the model rendering of numerical simulation.(2)Adjust the unbalance rate of air volume of the original system from 31.7%to below 10%,and adjust the maximum deviation of the dust collection point from 45%to1.8%,and the overall deviation is close to zero,and achieve full balance negative pressure operation of pipe network.The maximum unbalance rate of resistance loss of each branch is 4.2%,which meets the requirements of the design code for heating,ventilation and air conditioning of industrial buildings for the dust removal system.(3)The exhaust gas purification system of the sintering machine runs stably after commissioning,and the actual running air volume is not different from the numerical simulation result,which meets the requirements of running under the designed air volume.The reliability of the numerical simulation method is proved,which can be used to guide the optimization research of the tail gas purification system of sintering machine.