Thermal Stress Analysis And Optimum Design Of Continuous Electric Furnace

This paper mainly researches the continuous electric furnace, which is a new kind of furnace. Comparing with the traditional graphitization furnace, continuous graphitization furnace has low energy consumption, short in production cycle, high efficiency and low production cost. Cooler design is the biggest characteristic of continuous graphitization furnace. Due to the raw material is up to3000degrees Celsius, the cooler need to force cooling the raw material. Therefore, the furnace cooler must have the capable to withstanding high thermal stress. Graphitization furnace life directly relates to the whole life of Cooler, so it is very necessary to analysis the main factor to bring the failure of the graphitization furnace.The cooler mainly divided into three parts, every section contain it’s independent cooling sys(?). every section includes many of cooling water pipes, in the actual production of continuous graphitization furnace, damage occurs mainly in the first section and cooler entrance. In these areas, the temperature difference between inside and outside wall is very high, so inside and outside of the cooler wall form temperature gradients and it’s inevitable to produces thermal stress. It is quite necessary to analysis the temperature field and stress field of cooler entrance and the cooling water pipe in section1, and which the main factor to influence the thermal stress is. These studies have extremely vital significance for future cooler structure optimization design, manufacturing, maintenance and improve the furnace life.Because the axisymmetric characteristic of the cooler, a simplified2d finite element model is advisable, and use the heat transfer theory combine with experiment to calculation the internal and external wall temperature of the cooler, use the software ANSYS, to analysis temperature field and stress field of the cooler. And compare the analysis result of variable parameter with fixed parameters to determine which is more advisable. By doing this to ensure the results of analysis is more close to the actual situation, and more precision.In accordance with finite element analysis, find the main influential factors of maximum thermal stresses, and combining with actual situation, presented the optimizing design suggestion, and reestablish the finite element model to further analysis, puts forward the reasonable improvement suggestion. This research results has important reference meaning and reference value to improve the furnace cooler design and maintenance level.