Research on the Effect of Inner Wall Coking on the Performance of Industrial Furnaces
To address the issue of coking failure in industrial furnaces during operation,the impact of coking on the performance of industrial furnaces is studied.An industrial furnace with the model DG1025/18.3-Ⅱ5 is studied as the research object to analyze the coking mechanism of the inner wall of the industrial furnace.Then a finite element analysis model was constructed using the finite element software ABAQUS.The mesh of the coking layer in the model was relatively fine,and the metal mesh of the industrial furnace was relatively sparse.Finally,the model boundary conditions and operating conditions were set to test the performance of the industrial furnace caused by coking on the inner wall of the furnace.The research results show that the particle size of coal powder can affect the thickness of coking on the inner wall of industrial furnaces.The larger the particle size,the greater the coking thickness;with the increase of coking thickness,the yield strength,tensile strength,and elongation of industrial furnaces show a downward trend,indicating that coking on the inner wall of the furnace will have a nega-tive impact on the strength and plasticity of the industrial furnace,that is,its coking thickness is inversely proportional to the mechanical prop-erties of the industrial furnace;as the thickness of coking increases,the temperature at the interface between the metal substrate and the co-king layer of the industrial furnace gradually increases,and the temperature difference between the inner and outer walls of the industrial fur-nace gradually increases.That is,coking on the inner wall of the industrial furnace will damage its heat transfer performance;when coking oc-curs on the inner wall of an industrial furnace,the radial deformation of the outer wall is lower than that of the inner wall.As the coking thick-ness increases,the radial deformation of the inner and outer walls shows an increasing trend.When the deformation reaches a certain value,it will cause local expansion and cracking of the industrial furnace,thereby damaging its mechanical properties.In summary,coking on the inner wall of industrial furnaces can damage their mechanical,heat transfer,and mechanical properties.
coking on the furnace inner wallindustrial furnacefinite element modelboundary conditionsmechanical propertiesmechan-ical properties
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维普
