国产1000MW超超临界锅炉基建期受热面缺陷的分析与治理

Analysis and correction of defects in heating surfaces of domestic 1000MW ultra-supercritical boiler during construction period

建设大容量超超临界火力发电机组是我国火电发展的趋势,随着机组蒸汽压力和蒸汽温度的提高,锅炉受热面选用的钢材等级也在不断提升,在基建期间,控制锅炉受热面焊接工艺和质量也就成了重中之重。神华国华徐州发电有限公司首台1 000MW超超临界锅炉在基建期间加强金属质量监督,通过检查,发现了受热面管缺陷和隐患并采取有效措施进行了治理,保证机组长周期、安全、稳定运行。

The development trend of the domestic thermal power industry is to construct the ultra-supercritical units with large capacity.Along with the increasing of the steam pressure and the steam temperature of the unit,the steel grade selected for the boiler heating surface is increased continuously.In the construction period,the top priority is to control the welding process and the welding quality of boiler heating surface.In the construction period of the first 1000MW ultra-supercritical boiler in Shenhua Guohua Xuzhou Power Generation Corporation Limited,the supervision of metal quality was enhanced.By inspecting,the defects and the potential hazards of the heating surface tubes were found,and some effective measures were adopted,so the safe,stable and long-period operation of the unit was ensured.