断续螺旋折流板在大直径换热器中的应用研究与展望

Research and Prospect of Application of Intermittent Spiral Baffles in Large Diameter Heat Exchangers

通过一个实例简要介绍断续螺旋折流板在大直径换热器中的应用状况。结果表明,大直径断续螺旋折流板换热器在壳程单位压降下的传热系数仍高于传统的弓形折流板换热器,但换热效率稍差。从结果的比较与分析中探讨该换热器换热效率稍差的原因及其解决方法,通过对不同螺旋角的螺旋折流板换热器的壳程传热系数和总传热系数的比较,得出螺旋角小的换热器换热性能较好。

With a practical example, the application of intermittent spiral baffle in large diameter heat exchanger was briefly intro- duced. It has been shown that with unit pressure drop, the heat transfer coefficient by using intermittent spiral baffle was high than that by using traditional arc baffle, but, the heat transfer efficiency was little lower. With the comparison and analysis, the cause of low ef- ficiency and solving method were discussed. Through the comparison of shell side heat transfer coefficient with different spiral angle in spiral baffle with total heat transfer coefficient, it was concluded that the smaller the spiral angle, the better the heat transfer coeffi- cient. Then, the application of the heat exchanger with spiral baffle was prospected.