Pulse Combustion Mechanism Of Smart Heating Furnace And Research And Development Of Temperature Control System

The reheating furnace is the core equipment of the hot rolling production line.However,due to its highly nonlinear,large inertia and pure lag characteristics of the temperature control process,the traditional flame combustion control leads to large fuel consumption,large fluctuation of the atmosphere in the furnace,low accuracy of furnace temperature control,and serious side cracks caused by uneven heating of stainless steel,which cannot meet the production requirements of automated and intelligent production lines.Based on the above problems,aiming at the characteristics of the combustion control system of the heating furnace and the stainless steel heating process,through the design of advanced pulse combustion control system,combined with fuzzy control theory,improve the control accuracy of the temperature in the heating furnace,reduce the temperature fluctuation caused by the adjustment of the atmosphere in the furnace,reduce the energy consumption of the heating furnace and increase the output of the heating furnace.The main work includes :Firstly,aiming at the problems of large fluctuation of atmosphere in the furnace and the lag of temperature regulation under the control of traditional flame adjustment combustion in the step-by-step heating furnace,according to the actual working conditions of the pulse step-by-step heating furnace,a double coupling furnace temperature control model with furnace temperature and billet temperature model as the boundary is designed,and the double coupling setting of furnace temperature and billet temperature in each zone is realized synchronously.At the same time,the pulse combustion control strategy is formulated,and the control parameters of the pulse combustion control system are optimized by combining the fuzzy control theory.It provides basis and reference scheme for formulating intelligent control policy of intelligent heating furnace.Secondly,according to the industrial actual operation data of the walking-beam reheating furnace under the traditional flame-adjusting combustion mode and the pulse combustion mode,the variation law of the atmosphere in the furnace and the accuracy of the furnace control under the two combustion modes are compared.The heating analysis of the measured billet is carried out under the pulse combustion control based on the black box experiment.The stability of the pulse combustion and whether the temperature and heating uniformity of the stainless steel billet meet the requirements are verified by the black box experimental data.Finally,the intelligent steel burning system of pulse stepping heating furnace with man-machine friendly operation is designed.The system includes control and setting of combustion control,stepping,hydraulic,vaporization cooling and heating furnace monitoring and alarm.Under the control of pulse combustion control and intelligent temperature control system,the actual production data of the heating furnace for four months were counted,including the production data of the heating furnace,energy consumption and broken edge rate.It realizes the improvement of energy utilization rate,the increase of output and the decrease of finished product breaking rate after curling.Since the pulse stepping heating furnace and its intelligent temperature control system have been put into operation,the operation state is stable,the temperature control precision is high,and the atmosphere fluctuation in the furnace is small.The production output of stainless steel is increased while saving energy consumption of rolling line.It greatly improves the intelligent level of heating furnace.It provides strong support for enterprises to reduce costs and increase efficiency,and the results have broad promotion value.