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天津冶金局于1983年6月与有关单位协同设计制作了一台气-气式热管换热器,在轧钢一厂热带钢加热炉上安装试投运以来,一直工作正常。该热管换热器将经过喷流换热器后仍有300～350℃的烟气余热回收起来,提高风温80～90℃,节约燃料3～4％,经济效益显著,不到半年就收回了全部投资,其后,天津大成五金厂热处理炉、天津轧钢二厂小型轧
In June 1983, Tianjin Metallurgical Bureau designed and produced a gas-gas heat pipe heat exchanger in cooperation with the relevant units. Since the installation and commissioning of the first steel rolling plant in a steel rolling mill, the Tianjin Metallurgical Administration has been working normally. The heat pipe heat exchanger will still after the jet heat exchanger 300 ~ 350 ℃ flue gas waste heat recovery, increase the air temperature 80 ~ 90 ℃, saving 3 to 4% of fuel, significant economic benefits, less than six months to recover All the investment, then, Tianjin Dacheng Hardware Factory heat treatment furnace, rolling mill in Tianjin Small rolling