The flue gas inlet section of a high-temperature tubular flue gas heat exchanger with a flue gas temperature of 800℃was numerically simulated by fluid simulation software to provide an important basis for the design improvement of the high-tem-perature section of high-temperature tube flue gas heat exchangers.By software simulation calculation,the cold side fluid pressure drop data and wall temperature distribution data of the high-temperature section of the high-temperature heat exchanger under dif-ferent structures and flow rates were obtained.The data analysis of pressure drop and wall temperature was carried out to obtain the optimal design solution for the high-temperature section of the high-temperature tube-type flue gas heat exchanger.The results show that controlling the cold air flow rate in the high-temperature section at around 25 m/s is more reasonable for wall tempera-ture and pressure drop.Higher or lower flow rates have adverse effects on the overall design of the heat exchanger.The design of circular convection cold air channels in the high-temperature section is a more optimal design structure.This simulation provides new methods and ideas for the design of high-temperature heat exchange engineering.
关键词
化工机械/换热器/传热/有限元分析/数值模拟
Key words
chemical machinery/heat exchanger/heat transfer/finite element analysis/numerical simulation
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