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介绍了常钢钢管车间斜底式加热炉、无水冷辊底式退火炉和缝式冲头炉,在节能技术改造中分别选用片状管、辐射、对流和喷流辐射等金属换热器两次回收烟气余热的使用情况及经济效益.从损坏换热器的分析中得知,经常突然停电是换热器损坏的主要原因,换热器关键部位选用耐热球铁材质,安装放风阀,停炉时供半小时冷风,喷流换热器内筒下端增设耐热混凝土保护圈及风管阀门加一下限位使其无法关死,是它们达到有效使用的措施。
In this paper, we introduce the incline bottom heating furnace, the cooling bottom roller annealing furnace and slot punch furnace of Changgang Steel Pipe Plant. In the energy-saving technology reformation, two metal heat exchangers, such as sheet tube, radiation, convection and jet radiation, Recycling of flue gas waste heat use and economic benefits from damaged heat exchanger analysis, the frequent power outage is the main reason for heat exchanger damage, the heat exchanger selected key parts of heat-resistant ductile iron material, the installation of the valve , For half an hour when the cold shutdown windshield, spray heat exchanger at the lower end of the barrel to add heat-resistant concrete protection ring and duct valve plus a limit so that it can not be shut down, they are effective measures to achieve.