Numerical Simulation Of Flow Field Distribution And Heat Transfer Processin In Regenerative Push Steel Reheating Furnace

Billet heating furnace of steel rolling is important before rolling heating equipment,its main properties and determine the cost of production of steel rolling production,product quality,the normal operation of production line,etc,so the temperature field in the heating furnace of steel rolling,the flow field,smoke emissions and heat transfer process of billet temperature field of research to improve the quality of billet rolling and the iron and steel enterprise’s production efficiency has an important value.In this paper,the material properties of the steel billet and the heat transfer process in the regenerative pusher furnace are studied.Firstly,the heat transfer process of billet in regenerative push-steel heating with variable rhythm is simulated by finite element analysis.Taking the flow field as the boundary condition and initial condition,the convective heat transfer coefficient and radiation heat transfer coefficient of billet are analyzed in detail.At the same time,considering the actual working conditions,the radiation heat transfer is the main factor,converted to the equivalent heat absorption coefficient,the three-dimensional transient temperature field finite element analysis,which can lay a theoretical foundation for the optimization of the furnace flow field.Secondly,a mathematical model of fuel combustion,gas distribution and temperature distribution in the regenerative pusher reheating furnace was established based on the boundary condition and initial condition of billet and furnace temperature,coupled with the heat transfer process and combustion heat exchange law.Two-way turbulence model,P-1 radiation heat transfer model,PDF combustion model and generation mechanism model were used in Fluent to analyze the flow field inside the furnace,and the visual distribution of temperature field and flow field was obtained.In addition,the law of emission side of gas from heating furnace flue gas is summarized and analyzed.Based on the flow field distribution,temperature field distribution and flue gas emission law,the operating parameters such as nozzle Angle,preheating temperature of air and gas and air-fuel ratio of the reheating furnace are improved,and the improved operating parameters provide practical theoretical guidance for the actual production operating parameters.Finally,the cascading relationship between the change of billet temperature and the atmosphere in the furnace was analyzed by referring to the measured data of the black box.The simulation results were basically consistent with the law of the example,which verified the reliability of the numerical analysis of the simulation model.Push for regenerative heating furnace of steel billet heating process optimization and optimization provides the reference for heating system,according to the result of simulation,optimization of the heating furnace,air and gas nozzle Angle parameters such as preheat temperature,air-fuel ratio,after analyzed the change of regenerative heating furnace of steel increases the optimal degree of the indicators,in order to achieve the purpose of energy saving and consumption reducing.