Numerical simulation and system optimization of temperature field in pusher type continuous heat treatment furnace
In order to improve the temperature uniformity and heating efficiency of the internal temperature field of continuous heat treatment furnace,a pusher type continuous heat treatment furnace was used as a reference for modeling.ANSYS FLUENT software was used to simulate the distribution of the internal temperature field of the continuous furnace under steady-state conditions.The simulation results were compared and analyzed with the measured results,and the maximum error was within 10％.On this basis,the effects of heating tube diameter,tube row spacing and inlet position on the internal temperature uniformity and heating efficiency of the furnace were studied,and the heating system was optimized accordingly.The results show that appropriately moving the upper row of heating pipes down and the side air inlet up in the low-temperature heating section can improve the temperature uniformity and heating efficiency inside the furnace body,and changing the heating pipe diameter has little effect on the low-temperature section system.Properly changing the cross-sectional size of the tube and moving the side air inlet upwards in the high-temperature section can effectively improve the temperature uniformity and heating efficiency inside the furnace body,while changing the spacing between tube rows has little effect on the high-temperature section system.The specific optimization plan is:the diameter of the heating pipe in the low-temperature heating section is φ60 mm,move the upper heating tube down by 300 mm,and move the side air inlet up by 400 mm;high-temperature heating section heating pipe cross-sectional size is 8 mm×28 mm,move the side air inlet up by 100 mm.After optimization,the average temperature difference between the center and edge of the heated workpiece in the low-temperature section has been reduced from 48.5 ℃ to 30.8 ℃;the high-temperature section has been reduced from 140.8 ℃ to 16.1 ℃,significantly improving the temperature uniformity and heating efficiency inside the furnace body.
continuous heat treatment furnacenumerical simulationtemperature uniformityaverage temperature differencesystem optimization
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NSTL
万方数据
维普
