超超临界锅炉水冷壁管横向裂纹原因分析及控制策略Cause Analysis and Control Strategy of Transversal Water-wall Tube Crack of Ultra-supercritical Boilers
陈建江,童家麟,郭洪涛
CHEN Jianjiang,TONG Jialin,GUO Hongtao
摘要(Abstract):
超超临界锅炉水冷壁管横向裂纹已成为制约机组稳定运行的重要因素之一,对其形成原因进行研究并提出有效治理措施具有非常重要的意义。运用理化分析、数值模拟等方式对其水冷壁管横向裂纹产生原因进行分析,并从设备改造、燃烧优化等角度进行有针对性的治理。治理结果表明,在深度调峰已成为常态的现阶段,锅炉水冷壁管横向裂纹产生大幅放缓,治理效果明显。
Transversal water-wall tube crack is an important factor to restrict the stable operation of ultra-supercritical boilers. It is significant to study the formation reasons and propose governance measures. The physical and chemical analysis, numerical simulation are employed for analyzing the reasons for transversal waterwall tube crack. Besides, the equipment modification and combustion optimization are employed for governing transversal water-wall tube crack. The governance results show that the cause speed of the transversal waterwall tube crack is slowed down sharply with the constant in-depth peak load regulation, and the governance effects are obvious.
关键词(KeyWords):
横向裂纹;理化分析;数值模拟;治理措施
transversal crack;physical and chemical analysis;numerical simulation;governance measure
基金项目(Foundation):
作者(Author):
陈建江,童家麟,郭洪涛
CHEN Jianjiang,TONG Jialin,GUO Hongtao
DOI: 10.19585/j.zjdl.202002014
参考文献(References):
- [1]李文华,熊建国,许好好,等.1 025 t/h锅炉末级过热器频繁爆管机理研究[J].热能动力工程,2017,32(S1):121-125.
- [2]张家维,张忠华,张振杰,等.超超临界锅炉内螺纹管垂直上升水冷壁横向裂纹原因分析及治理[J].东北电力技术,2013(10):24-30.
- [3]赵炜炜,彭以超,闫飞,等.超超临界机组低温再热器导向管夹焊缝泄漏分析[J].浙江电力,2019,38(4):109-113.
- [4]中国电力企业联合会.中国电力行业年度发展报告[M].北京:中国市场出版社,2019.
- [5]李剑,熊建国,童家麟,等.深度调峰中锅炉超低负荷稳燃技术的研究[J].浙江电力,2018,37(2):62-66.
- [6]严方.火电机组水冷壁管横向裂纹失效机理分析与热应力数值模拟[J].热加工工艺,2013,42(10):83-86.
- [7]李斌,汪华剑,梁学东,等.超超临界锅炉水冷壁管传热恶化对横向裂纹影响的有限元分析[J].中国电力,2015,48(12):64-69.
- [8]张兴豪,汪华剑,白鹏,等.超临界锅炉水冷壁横向裂纹形成原因分析[J].铸造技术,2016,37(1):67-70.
- [9]徐贤,刘励,马秀梅,等.国电宁夏大武口发电厂水冷管管横向裂纹原因分析[J].宁夏电力,2006(1):60-63.
- [10]张义伟,袁晓敏,李胜祗,等.控制冷却工艺对SA213-T12锅炉钢组织性能的影响[J].材料热处理学报,2016,37(增1):34-38.
- [11]陈铭,王永杰,刘晓东.超超临界直流锅炉水冷壁横向裂纹治理[J].热能动力工程,2019,34(5):142-148.