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1概况焦化二厂供汽车间2台UG-35/3.82-Q蒸汽锅炉结构如图1所示。锅炉技术参数:额定蒸发量为35t/h;额定蒸汽压力为3.82MPa;额定蒸汽温度为450℃;给水温度为104℃;排烟温度为137℃;锅炉热效率为91.7%。因腐蚀破坏的部件有下级空气预热器和排烟管道。下级空气预热器采用管式空气预热器结构,用φ40×1.5有缝管子制成,与烟气呈2个回程交差流;空气从炉后进出,烟气从下级空气预热器底部引出;下级空气预热器共有管子1623根,管长2604mm。锅炉排烟管道采用矩形烟道,由厚度为5mm的普通金属钢板焊接而成。
1 Overview Coking Plant for the workshop 2 UG-35 / 3.82-Q steam boiler structure shown in Figure 1. Boiler technical parameters: rated evaporation 35t / h; rated steam pressure of 3.82MPa; rated steam temperature of 450 ℃; water temperature of 104 ℃; exhaust temperature of 137 ℃; boiler thermal efficiency of 91.7%. Parts damaged by corrosion have lower air preheaters and exhaust pipes. Lower air preheater tube air preheater structure, made of φ40 × 1.5 slit pipe, and the flue gas was two return alternating flow; air out of the furnace, the flue gas from the bottom of the air preheater leads to the bottom ; Lower air preheater total of 1623 tubes, tube length 2604mm. Boiler exhaust pipe rectangular flue, the thickness of 5mm common metal welded steel plate.