新型热解炉燃烧室流热固耦合仿真与结构优化

针对新型热解炉燃烧室结构，采用ANSYS Workbench流热固耦合方法，研究不同结构参数下燃烧室的温度场与变形场，获得了最优的燃烧室结构。结果表明，燃烧室内设挡板的结构性能优于无挡板的结构性能，燃烧室内设挡板的温度场变异系数的变化幅度比无挡板的变化幅度减小0.06，温度场分布更均匀；燃烧室的最大变形出现在燃烧室与热解室之间的隔板上，有挡板的燃烧室最大变形量较无挡板的燃烧室减少80%，且最大变形量均随着挡板位置距中心的距离或挡板长度增加呈先减小后增大的趋势，而挡板厚度对变形场的影响最小；在挡板位置为150 mm，挡板长度为800 mm，挡板厚度为14 mm时，新型热解炉燃烧室的结构最优。

Fluid-thermal-structure coupling simulation and structural optimization of combustion chamber of a new pyrolysis furnace

In order to dispose oily sludge, a vertical multi-layer rotating disc pyrolysis furnace is developed independently. The high-temperature gas generated in the combustion chamber provides heat for the pyrolysis furnace. Therefore, the thermal efficiency and safety of the combustion chamber are the guarantee for the stable operation of the entire pyrolysis furnace. In order to determine whether the new pyrolysis furnace structure was safe and feasible, the temperature field and deformation field of the combustion chamber under different structural parameters were studied by using the fluid-thermal-solid coupling method of ANSYS Workbench, and the structure of the combustion chamber of the pyrolysis furnace was optimized by exploring the parameters of the baffle. The results showed that the structural performance of the baffle in the combustion chamber was better than that without baffle. The variation range of the temperature field variation coefficient of the combustion chamber with the baffle was 0.06 smaller than that without baffle, and the temperature field distribution was more uniform. The maximum deformation of the combustion chamber appeared on the partition between the combustion chamber and the pyrolysis chamber. The maximum deformation of the combustion chamber with baffle was 80% less than the maximum deformation of the combustion chamber without baffle, and the maximum deformation with the increase of the position of the baffle to the centre or the length of the baffle showed a trend of first decreasing and then increasing, and the thickness of the baffle had the least influence on the deformation field. When the baffle position was 150 mm, the length of the baffle was 800 mm, and the thickness of the baffle was at 14 mm, the structure of the combustion chamber of the new pyrolysis furnace was optimal. The use of fluid-thermal-solid coupling method for the optimization design of such combustion chamber structure had more reliable engineering significance, and it also provided technical support for the subsequent industrial application of oily sludge pyrolysis technology.