某电厂1025t/h锅炉中温再热器爆管原因分析与对策  

Cause Analysis and Countermeasures against Pipeburst of Moderate Temperature Reheater of 1025t/h Boiler in a Power Plant

作　　者：张延京[1] 马志鸿[2] 

机构地区：[1]中国电力工程顾问集团华北电力设计院工程有限公司,北京100120 [2]兖矿集团有限公司南屯电力分公司,山东邹城273515

出　　处：《广东电力》2011年第11期100-105,共6页Guangdong Electric Power

基　　金：广东省产业技术研究与开发资金计划资助项目(2010B010900034)

摘　　要：针对某电厂1 025 t/h锅炉中温再热器爆管的情况,对中温再热器管爆口取样进行宏观、微观分析和组织球化评级,发现弯管的向烟侧组织普遍严重球化,且爆口处金相组织中已出现大量碳化物聚集在晶界上。根据对现场运行工况的调查研究,以及爆管特性的比较,认定中温再热器管长期超温运行是造成其爆管的根本原因。针对此,提出了改进对策和预防措施。Aiming at pipeburst of moderate temperature reheater of 1 025 t/h boiler in a power plant, macroscopic analysis, microscopic analysis and grading of nodularization on sampling are carried through. It is found that there is serious nodularization on structure at smoke side and large amount of carbide on grain boundary in fine texture of the burst. In accordance to investigation on operating condition and comparison of pipeburst characteristics, it is believed that the long-term overtemperature operation results in the pipeburst. Therefore, improvement and precautions are given.

关 键 词：电厂锅炉 中温再热器管 爆管分析 显微组织 

分 类 号：TM714.3[电气工程—电力系统及自动化]