CAJ | 학술논문

金属蒸汽侧氧化膜的生长和剥落对超临界或超超临界锅炉高温受热面的安全性有直接影响。以2台600MW超临界锅炉为对象，详细分析因蒸汽侧氧化膜剥落所导致的高温过热器爆管事故，介绍实际运行中所采取的提高高温受热面安全性的技术措施。在此基础上，以T91和TP347HFG管材为例，针对设备改造设计提出基于金属蒸汽侧氧化膜生长和剥落规律评价高温受热面金属安全性的方法，并应用于这2台锅炉高温过热器的实际改造方案的安全性评价，评价结果表明改造方案可以实现高温过热器在一个大修期内安全运行的预定目标，同时给出进一步优化改造方案的建议。研究结果对于制定锅炉检修计划和安全运行技术措施具有指导意义。
금속증기측양화막적생장화박락대초림계혹초초림계과로고온수열면적안전성유직접영향。이2태600MW초림계과로위대상，상세분석인증기측양화막박락소도치적고온과열기폭관사고，개소실제운행중소채취적제고고온수열면안전성적기술조시。재차기출상，이T91화TP347HFG관재위례，침대설비개조설계제출기우금속증기측양화막생장화박락규률평개고온수열면금속안전성적방법，병응용우저2태과로고온과열기적실제개조방안적안전성평개，평개결과표명개조방안가이실현고온과열기재일개대수기내안전운행적예정목표，동시급출진일보우화개조방안적건의。연구결과대우제정과로검수계화화안전운행기술조시구유지도의의。
The growth and spalling of steam-side oxide scale have direct effects on the operation safety of high- temperature heating surfaces in supercritical or ultra- supercritical boilers. The accidents leading to the rupture of high temperature super-heater tubes induced by the spalling of oxide scale were analyzed on the basis of two 600 MW supercritical boilers, and technical measures adopted in practical operation were also introduced in detail. As for the retrofit design, measures considering the growth and spaUing mechanism of steam-side scale for the evaluation of the metal safety were presented with the cases of T91 and TP347HFG tubes, the evaluation result is that high temperature super- heater tubes of two 600 MW supercritical boilers should be safe in a overhaul period after retrofit, and suggestions for the further optimization were also proposed. The research can provide valuable reference for the safety operation and the establishment of the boiler scheduled maintenance procedure.