循环流化床锅炉水冷壁管磨损原因分析与预防.doc

循环流化床锅炉水冷壁管磨损原因分析和预防 摘 要 水冷壁管是循环流化锅炉受热面中磨损最严重的部位之一，但由于各种原因造成水冷壁管磨损，发生局部破坏，甚至导致停炉事故，严重影响了锅炉的使用安全性和效率。近年来,防磨器材厂家与锅炉生产厂家都做了大量的尝试,但总不能达到令人满意的效果。 本文对循环流化床锅炉运行中水冷壁管磨损、泄漏的原因进行了分析、总结，并提出相应的调整和改进措施。指出各自的局限性对一系列磨损案例的分析找出了磨损的规律，并据此提出和验证了新的防磨损方法，有效的降低了水冷壁的磨损，水冷壁爆管发生率明显降低，锅炉运行周期明显见长，延缓锅炉水冷壁管的磨损，保证锅炉安全、经济运行。 关键词：水冷壁管；循环流化床锅炉；磨损；改进措施 Abstract Water-wall tubes are circulating fluidized boiler heating wear the most serious smelliest, but due to various causes of water-wall tubes, partial damage and wear furnace and even cause accidents, the serious influence the use of boiler safety and efficiency. In recent years, the mill equipment manufacturers and boiler manufacturers are doing a lot of trying, but always cant achieve satisfactory results. This paper circulating fluidized bed boiler water-cooled wall tube wear, leakage reasons were analyzed and summarized, and put forward the corresponding adjustment and improvement measures. Their limitations on a series of case analysis to find the wear and abrasion, and then put forward and proved effective and new methods, the reduced water-wall wear, water-cooled wall pipe explosion significantly reduced incidence, boiler operation cycle clearly, delaying boiler of water-wall tubes, to ensure the safety and wear economic operation. Key words: Water-wall tubes the circulating fluidized bed boiler abrasion improvement measures 目 录 第一章 绪论 1 1.1 循环流化床锅炉概况 1 1.2 循环流化床锅炉的工作原理及其优点 1 1.3 循环流化床锅炉水冷壁管的磨损 1 第二章 循环流化床锅炉水冷壁管磨损的原因分析 3 2.1锅炉水冷壁管磨损原理 3 2.2锅炉水冷壁管磨损的因素 3 2.2.1燃烧因素 3 2.2.2 设计、安装因素 4 2.2.3运行因素的影响 4 2.3火电厂锅炉水冷壁管防腐耐磨研究 5 2.3.1水冷壁管高温腐蚀和磨损的危害 5 2.3.2水冷壁管高温腐蚀和磨损的机理 6 2.3.3防止水冷壁高温腐蚀和磨损的途径 6 2.4锅炉水冷壁管磨损、泄漏原因 7 第三章 锅炉水冷壁管磨损的预防措施 9 3.1　检修工艺方面 9 3.1.1　膜式水冷壁局部热喷焊 9 3.1.2　加装防磨平台 9 3. 2　运行调整方面 9 3.2.1　严格控制适宜的风量 9 3.2.2　严格控制入炉煤的煤质和粒度 10 3.2.3　控制锅炉床压 10 3.3 对水冷壁管不同部位的预防措施 10 3.4锅炉水冷壁管磨损、泄漏的预防措施 11 结论 13 致 谢 14 参考文献 15 第一章 绪论 循环流化床锅炉概况 合肥天源热电有限3＃、4＃循环流化床锅炉是由济南锅炉集团有限公司制造生产的中温、中压锅炉，采用旋风分离器组成循环燃烧系统，炉膛为膜式水冷壁结构，过热器分高、低二级过热器，中间设喷水减温器，尾部设三级省煤器和一、二次风预