600MW超临界锅炉TP347H屏式过热器管强激光与粒子束高温蒸气氧化腐蚀探讨
High Temperature Steam Oxidization Resistance of TP347H Panel Division Super-heater Tubes for 600MW Super-critical Boiler
摘 要
对某电厂600MW超临界锅炉中TP347H屏式过热器管在运行5 000 h后内壁出现大量氧化皮的现象进行了综合分析:过热器管的化学成分和力学性能分析,氧化皮的形貌、能谱和X射线衍射分析,结果表明,氧化皮致密层中的Cr含量高于疏松层及基体,有助于延缓管材的氧化,造成严重氧化的原因可能与超温运行和加氧运行有关.后来在电厂运行中采取一定的保护措施,继续运行到10 000 h后检查,氧化状况得到明显改善.
氧化皮
抗氧化
super-critical boiler
scale
oxidation resistance
Abstract
There were large number of oxide in internal surface of the TP347H panel division super-heater tubes after operation for 5000 h in a 600MW super-critical boiler.The chemial composition and mechanical properties of the material and oxide morphology etc were analyzed by meuns of SEM,EDS etc.The results indicated that Cr content in the compact scale layer was higher than that in the loose layer and in the base,resulling in the enhancement of the oxidation resistance.The reasons causing serious oxidation may be related to overrun-temperature and operation with adding oxygen.After taking some protection measures the oxidation resistance of tubes was improved obviously,and the tubes had been operated continuously for 10 000 h.
中图分类号 TG172.8
所属栏目 应用技术
基金项目
收稿日期 2008/2/2
修改稿日期 2008/4/9
网络出版日期
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引用该论文: DENG Yong,LIU Sheng-bo,PENG Fang-fang,YANG Shou-en. High Temperature Steam Oxidization Resistance of TP347H Panel Division Super-heater Tubes for 600MW Super-critical Boiler[J]. Corrosion & Protection, 2009, 30(2): 124～127
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参考文献
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【2】杨德钧.金属腐蚀学[M].北京:冶金工业出版社,2003.
【3】汪德良,李志刚,柯于进,等.超超临界参数机组的水汽品质控制[J].中国电力,2005(8):57-61.
【4】沈嘉年,周龙江,李铁藩,等.水蒸汽加速Fe-Cr合金高温氧化的作用[J].材料研究学报,1998(2):128-132.
【5】李辛庚,何家文.喷丸处理提高TP304H耐热钢锅炉管抗水蒸气氧化性能应用效果的观察[J].中国腐蚀与防护学报,2003(3):171-174.
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