摘要
热浸镀锌锅主要有铁锅、陶瓷锅、坩埚等,加热方式有上加热、内加热、感应加热等。铁锅镀锌加热方式为外加热,适用于440～450℃低温镀锌;陶瓷锌锅使用温度在420～800℃,使用寿命能达到10 a。详细介绍浸入式燃气内加热烧嘴的结构及特点。铝合金外壳为双层结构,排烟管设有绝热材料;烧嘴内芯由燃气连接法兰、燃气导管、空气导管、混合燃烧室及火焰监测、点火电极组成;马刺状金属换热器利用烟气通过内置换热器预热助燃空气,火焰喷出速度约120～160 m/s;直接电极点火,多级燃烧,火焰温度低。浸入式燃气内加热器利用陶瓷外套管加热锌液,由于配置特殊的换热器和循环再加热辐射管,浸入式燃气内加热器的热效率最高可达67%。
Hot dip galvanized pot has iron pot, ceramic zinc pot and crucible zinc pot etc. heating method has upper heating, inner heating and inducting heating etc. the heating method of iron pot is outer heating, it is suitable for 440 - 450 ℃ low temperature galvanizing. The using temperature of ceramic zinc pot is 420 ～ 800 ℃, the service life can reach 10 years. The structure and characteristic of gas heating immersion heater nozzle are introduced in detail. Aluminium alloy shell is double layer structure, there is insulation material in the exhaust pipe, the nozzle inner core is consist of gas con- necting flange, gas duct, air duct, mixing combustion chamber, flame monitor, ignitor electrode. The combustion air is preheated by the spurs shape metal heat exchanger using smoke with inner heat exchanger, flame jet speed is about 120 - 160 m/s, it is direct ignition electrode, multi stage combustion, flame temperature low. The gas heating immersion heater uses ceramic sheath to heat molten zinc, the heat efficiency of gas heating immersion heater can reach the highest 67% because it is installed special heat exchanger and recycled heating radiation tube.
出处
《金属制品》
2012年第3期36-39,共4页
Metal Products
