3-220-100型锅炉系苏制高温高压锅炉,负压燃烧,额定出力为220t/h、额定汽压9.8MPa、额定汽温540℃。炉顶面积为4.7×10m~2。该炉自1959年投产时和以后的历次检修中,均采用传统炉顶保温密封方式,即在锅炉顶棚过热器管上先烧制一层耐火混凝土,然后在上面砌筑(石至)石保温两层(厚约200mm),在过热器穿墙管处则在耐火混凝土上填充硅酸铝耐火纤维,在膨胀缝处做成简单的迷宫型密封,然后进行水 3-220-100 type boiler is a Soviet-made high-temperature and high-pressure boiler with negative pressure combustion, rated output 220t / h, rated steam pressure 9.8MPa and rated steam temperature 540 ℃. Roof area of ​​4.7 × 10m ~ 2. The furnace from the 1959 production and after the previous maintenance, the use of traditional roof insulation seal, that is, in the boiler roof superheater tube firing a layer of refractory concrete, and then masonry (stone to) stone insulation Two layers (about 200mm thick) are filled with refractory concrete with alumina silicate refractory fibers at the wall of the superheater and a simple labyrinth seal at the expansion joints, followed by water