The key to the design of dusty flue gas heat exchangers is to enhance heat transfer and solve the fouling problem. In this paper, a honeycomb 4H-type finned tube heat exchanger (FTHE) was proposed. A three-dimensional numerical investigation was conducted on heat transfer and flow friction characteristics of honeycomb 4H-type FTHEs. Firstly, the flow field and temperature of H-type FTHEs with inline and honeycomb arrangements were analyze. Then, the effect of different structural parameters (oblique tube pitch, fin height, slit width, fin pitch and fin thickness) and Re number were analyzed. Finally, the predicted correlations of Nu number and Eu number of honeycomb 4H-type FTHEs were obtained based on the multiple regression method and 105 sets of numerical data. The results show that the thermal-hydraulic performance of honeycomb 4H-type FTHEs is superior to that of aligned single H-type FTHEs. Through parametric analysis, it is found that Nu number is only negatively correlated with oblique tube pitch, and Eu number is negatively correlated only with fin pitch and slit width. Besides, the average error of correlations of Nu number and Eu number is less than 3%, which provides practical guidance for efficient recovery of industrial waste heat.

含尘烟气换热器设计的关键是加强传热和解决结垢问题。在本文中，提出了一种蜂窝4H型翅片管换热器（FTHE）。对蜂窝4H型FTHE的传热和流动摩擦特性进行了三维数值研究。首先，分析了具有直列式和蜂窝状排列的H型FTHE的流场和温度。然后，分析了不同结构参数（斜管间距、翅片高度、狭缝宽度、翅片间距和翅片厚度）和Re数的影响。最后，Nu数和Eu的预测相关性基于多元回归方法和105组数值数据得到蜂窝4H型FTHE的数量。结果表明，蜂窝4H型FTHE的热工水力性能优于对齐的单H型FTHE。通过参数分析发现，Nu数仅与斜管节距呈负相关，Eu数仅与翅片节距和狭缝宽度呈负相关。此外，Nu数与Eu数的相关性平均误差小于3%，为工业余热的高效回收提供了实践指导。