300MW循环流化床锅炉爆管事故分析研究
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摘要
循环流化床锅炉被公认为极具发展前途的炉型之一,但其爆管频率比其他炉型频率高得多。本文针对广东省某循环流化床锅炉中隔墙爆管事故进行分析研究,结果表明:此次蒸汽泄露应是热胀推(拉)力产生的交变弯曲应力导致的疲劳开裂,并且开裂在炉前后两个方向都有可能产生。同时根据相关经验及理论知识推断出炉前侧的开裂多发生在降负荷(停炉)过程中,炉后侧的开裂多发生在升负荷(启炉)过程中。根据分析结果及现场实际情况,提出了三项处理措施,有效控制了爆管问题。
Circulating fluidized bed boiler is recognized as one of the promising boiler in the furnace.But the tube rupture frequency is much higher than others. This paper analyze tube rupture on the partition wall of a CFB boiler in Guangdong Province. The results show that: the steam leakage should be fatigue cracking caused by alternating bending stress of expansion push( pull) force and two directions before and after cracking are likely to be produced. At the same time,we can conclude according to the relevant experience and theoretical knowledge that cracking furnace front occurs in the lower load( shutdown) process,cracking furnace rear occurs in the loading( rev furnace) process. According to the analysis results and the actual situation,this paper puts forward three measures which effectively controlled the tube rupture problem.
Circulating fluidized bed boiler is recognized as one of the promising boiler in the furnace.But the tube rupture frequency is much higher than others. This paper analyze tube rupture on the partition wall of a CFB boiler in Guangdong Province. The results show that: the steam leakage should be fatigue cracking caused by alternating bending stress of expansion push( pull) force and two directions before and after cracking are likely to be produced. At the same time,we can conclude according to the relevant experience and theoretical knowledge that cracking furnace front occurs in the lower load( shutdown) process,cracking furnace rear occurs in the loading( rev furnace) process. According to the analysis results and the actual situation,this paper puts forward three measures which effectively controlled the tube rupture problem.
引文
[1]孙献斌,黄中.大型循环流化床锅炉技术与工程应用[M].北京:中国电力出版社,2013.
[2]孙立新,范寻理,王文峰.兖矿南屯电力分公司某锅炉顶棚水冷壁爆管的分析与治理[J].锅炉制造,2011,7(4).
[3]刘全国,郭宁.循环流化床锅炉爆管原因分析及预防措施[J].内蒙古石油化工,2011,(11):57-59.
[4]申德峰,商海智,田民格,等.75 t/h循环流化床锅炉爆管事故原因分析及处理[J].清洗世界,2010,26(6):42-44.
[5]梁坚,梅春仙.锅炉爆管成因及对策[J].东方电气评论,2013,27(105):59-65.
[6]Y.M.Ferng*,C.T.Chen.CFD investigating thermal-hydraulic characteristics and hydrogen generationfrom graphiteewater reaction after SG tube rupture in HTR-10 reactor[J].Applied Thermal Engineering,2011,7:2431-2436.
[7]尤佐元,邹苍胜,廖鹏.300 MW循环流化床锅炉受热面爆管的事故处理[J].锅炉制造,2007,10(4):19-21.
[8]刘堂礼.汕头电厂锅炉再热器爆管原因分析[J].广东电力,1997,(4):5-7.
[9]林少文,胡平,钟万里,等.广州发电厂5号锅炉水冷壁爆管原因分析[J].广东电力,2002,15(3):69-71.
[10]邱建平.水冷壁管爆管案例综合分析[J].广东电力,2007,20(8):38-41.
[2]孙立新,范寻理,王文峰.兖矿南屯电力分公司某锅炉顶棚水冷壁爆管的分析与治理[J].锅炉制造,2011,7(4).
[3]刘全国,郭宁.循环流化床锅炉爆管原因分析及预防措施[J].内蒙古石油化工,2011,(11):57-59.
[4]申德峰,商海智,田民格,等.75 t/h循环流化床锅炉爆管事故原因分析及处理[J].清洗世界,2010,26(6):42-44.
[5]梁坚,梅春仙.锅炉爆管成因及对策[J].东方电气评论,2013,27(105):59-65.
[6]Y.M.Ferng*,C.T.Chen.CFD investigating thermal-hydraulic characteristics and hydrogen generationfrom graphiteewater reaction after SG tube rupture in HTR-10 reactor[J].Applied Thermal Engineering,2011,7:2431-2436.
[7]尤佐元,邹苍胜,廖鹏.300 MW循环流化床锅炉受热面爆管的事故处理[J].锅炉制造,2007,10(4):19-21.
[8]刘堂礼.汕头电厂锅炉再热器爆管原因分析[J].广东电力,1997,(4):5-7.
[9]林少文,胡平,钟万里,等.广州发电厂5号锅炉水冷壁爆管原因分析[J].广东电力,2002,15(3):69-71.
[10]邱建平.水冷壁管爆管案例综合分析[J].广东电力,2007,20(8):38-41.