某放射性废金属熔炼炉接受式排风罩优化研究

Research on the optimization of the receiving exhaust hood of a smelting furnace for radioactive scrap metal

为有效收集核设施废金属在回炉熔炼过程中产生的放射性气溶胶,选取某放射性废金属熔炼炉为研究对象,采用Fluent数值模拟方法模拟不同高度、不同罩口尺寸、干扰风等因素对排风罩的影响。结果表明熔炼炉口直径为0.5 m、0.3 m/s的横风、排风罩高度为1.5 m,优化后直径D=1.4 m的圆形罩,可以有效排除熔炼炉产生的放射性气溶胶。使用CFD数值模拟方法优化后的排风罩与理论计算设计相比,排风罩直径减少了0.84 m,风量减少了0.616 m^(3)/s,可为熔炼炉排风罩的设计提供参考和借鉴。

Purpose:In order to effectively collect radioactive aerosols generated during the re-smelting process of scrap metal in nuclear facilities,and to protect the health of workers,we conducted a research on the optimization of the receiving exhaust hood.Method:A certain radioactive scrap metal smelting furnace was selected as the research object.We established a model,divided the grid,and finally used the Fluent numerical simulation method to simulate the influence of factors such as different heights,different hood sizes,and interference winds on the exhaust hood.Results:The smelting furnace mouth diameter is 0.5 m,there is a cross-wind of 0.3 m/s,and the height of the exhaust hood is 1.5 m.The optimized exhaust hood is a circular hood with a diameter of D=1.4 m,which can effectively eliminate the radioactive aerosol produced by smelting furnace.Conclusion:Compared with the theoretical calculation design,the exhaust hood optimized by the CFD numerical simulation method has reduced the diameter of the exhaust hood by 0.84 m and the air volume by 0.616 m^(3)/s,which saves space and energy.It can provide reference for the design of smelting furnace exhaust hood.