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本文针对小型工业炉高温烟气余热回收，提出一种新型碳化硅－金属组合式高温换热器。其中高温段的ＳｉＣ装置采用了新开发研制的内翅片式ＳｉＣ换热管、改进的密封和热补偿结构，使传热效率和结构紧凑性得以提高；中温段金属换热器以Ｕ形管结构消除温差应力，并从结构和流程上防止了管板和管壁超温过热。该组合换热器工业试验装置用于锻造加热炉热能回收，在８００－９２０℃的烟温下，将空气预热到１００－１５３℃，操作性能稳定，取得良好节能效果。
In this paper, for the recovery of high temperature flue gas waste heat from a small industrial furnace, a new type of silicon carbide-metal composite high temperature heat exchanger is proposed. In the high temperature SiC device, a newly developed inner finned SiC heat transfer tube, an improved sealing and thermal compensation structure are adopted to improve the heat transfer efficiency and the compactness of the structure. The medium temperature heat exchanger is a U-shaped tube Structure to eliminate temperature stress, and from the structure and flow to prevent the tube plate and tube wall overheating overheating. The combined heat exchanger industrial test device is used for the heat recovery of the forging furnace, and the air is preheated to 100-153 DEG C at the temperature of 800-920 DEG C, the operation performance is stable and good energy-saving effect is achieved.