造气废热锅炉改造小结  

Brief Sum-Up of Transformation of Waste Heat Boiler of Gasifier

作　　者：戴乐亭 孙纪念 

机构地区：[1]河南安阳化学工业集团公司,455133

出　　处：《化肥工业》2005年第2期53-55,共3页Chemical Fertilizer Industry

摘　　要：以造气火管式废热锅炉的改造为主线,对火管式废热锅炉存在的火管变形扭曲、热应力无法消除、露点腐蚀、焊接工艺、水侧的氧腐蚀和垢下腐蚀问题进行了剖析。提出了改进意见,即热水加热器管间距由32m扩至50mm、软水加热器及套管式过热器最上端增加防腐护瓦、设计1台专用制贫气锅炉、改进材质等,并对改造后的套管式锅炉结构特点及其使用效果进行了介绍。With the transformation of the fire tube waste heat boiler of the gasifier as the principal line, problems in the fire tube boiler are analyzed, viz., the deformation and torsion of the fire tubes, inability to eliminate the thermal stress, dew point corrosion, welding procedure, oxygen corrosion on the water side, and corrosion under the scale. Suggestions on improvement are put forward, including the space between the hot water heater tubes enlarging from 32 mm to 50 mm, the addition of protective bushes to the top ends of demineralized water heater and double-pipe superheater, design of a special boiler for giving lean gas, and improvement on the materials. A presentation is given of the characteristics of the double-pipe boiler structure and its service results after the transformation.

关 键 词：锅炉改造 造气 火管式废热锅炉 热水加热器 软水加热器 露点腐蚀 焊接工艺 腐蚀问题 使用效果 结构特点 套管式 热应力 氧腐蚀 管间距 过热器 水侧 

分 类 号：TQ113.264[化学工程—无机化工] TK229.66[动力工程及工程热物理—动力机械及工程]