Application Research Of Bottom Erosion Of Blast Furnace Hearth Based On Industrial Wireless Detection

Blast furnace lining is subject to various erosion and damage for a long time,mainly including hot metal erosion and thermal stress.It is an important factor affecting the longevity of blast furnace.Research on lining erosion has important significance for extending the furnace age and safety production.In this paper,taking the blast furnace cooling system of an ironmaking plant as the research background,a constant temperature differential variable flow cooling control system is established to convert the blast furnace erosion analysis into a three-dimensional steady-state heat transfer problem.The finite element analysis software is used to analyze the blast furnace erosion.Situation detection and safety warning functions.In this paper,a high-precision wireless temperature monitoring system based on the Simplici TI network protocol was designed and developed for the erosion analysis of the lining of the blast furnace.The detection terminal and the node both use the CC1110 as the main control unit,and a novel detection circuit is designed by combining the working characteristics of the AD7799 and Pt1000.The temperature conversion result is fitted by the least squares method,and the water temperature is detected with high accuracy and is designed through software.The low energy consumption of the water temperature acquisition node is achieved.RS485 and network communication are used to complete the data transmission between the terminal and the ARM collector and the collector and the host computer,and the realtime display of the results is finally completed.This article is based on the principle of constant temperature differential variable flow water supply method,designed a blast furnace cooling wall heat load control algorithm,its essence is to control the cooling wall water temperature difference and its flow.The article models the controlled cooling system,which mainly includes the establishment of the cooling wall heat transfer model.In combination with the time delay,an adaptive fuzzy PID controller is designed to adjust the cooling water flow and achieve the purpose of controlling the cooling water temperature difference.Based on the thermodynamic analysis,combined with the detected temperature difference of the cooling wall and the thermocouple data of the furnace lining,a threedimensional steady-state heat transfer model of the lining of the blast furnace was built using the finite element analysis software ANSYS.The data was combined with the data of the cooling stave and the data of the thermocouples on the furnace.The internal temperature field was analyzed to infer the 1350°C erosion line.The analysis shows that erosion analysis using the system-detected cooling wall heat flux intensity data can accurately analyze the corresponding regional erosion status.If combined with the blast furnace thermocouple data,it can accurately reflect the erosion status of the blast furnace liner.