烟气轮机进气锥隔板焊缝开裂原因分析及解决措施
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摘要
介绍了烟气轮机的主要设备结构和使用功能,详述了在役烟气轮机进气锥隔板与锥体连接部位出现的焊缝开裂情况,分析了进气锥流道内的复杂温度场和焊缝位置存在的多种应力、应力和腐蚀介质共同作用下的焊缝腐蚀及其发展机理、现有进气锥结构设计方面的考虑与实际不足、隔板和锥体母材与焊材之间存在的焊接性能差异,提出并实施了对隔板和支持锥的结构改进,解决了影响烟气轮机安全平稳长周期运行的隐患,提高了烟气轮机的使用性能。
Main structure and using function of the flue gas turbine are introduced,and the cracking of weld connecting baffle plate and cone body of the turbine in service are detailed.The complicated temperature field within the intake cone flow passage and various stress at the weld position,weld corrosion and its development mechanism under the combined function of stresses and corrosive media,design consideration and actual shortcomings of existing baffle plate and supporting cone are analysized in turn.As a result,improvement measures are proposed and carried out,which solved potential problems in the flue gas turbine safe,stable and long term operation and has been proved to be efficient.
Main structure and using function of the flue gas turbine are introduced,and the cracking of weld connecting baffle plate and cone body of the turbine in service are detailed.The complicated temperature field within the intake cone flow passage and various stress at the weld position,weld corrosion and its development mechanism under the combined function of stresses and corrosive media,design consideration and actual shortcomings of existing baffle plate and supporting cone are analysized in turn.As a result,improvement measures are proposed and carried out,which solved potential problems in the flue gas turbine safe,stable and long term operation and has been proved to be efficient.
引文
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[2]梁凤印.流化催化裂化[M].北京:中国石化出版社,2006.LIANG F Y.Fluid catalytic cracking[M].Beijing:China Petrochemical Press Co.Ltd.,2006.
[3]烟气轮机技术条件:HG/T 3650-2012[S].Specifications for gas expander:HG/T 3650-2012[S].
[4]丁勤,冀江.高效烟气轮机设计的探讨[J].石油化工设备技术,2009,30(2):1-5.DING Q,JI J.Discussion on the design of high efficiency FCC flue gas expander[J].Petro-chemical equipment technology,2009,30(2):1-5.
[5]S L狄克逊,C A霍尔.透平机械中的流体力学与热力学[M].西安:西安交通大学出版社,2016.Dixon S L,Hall C A.Fluid mechanics and thermodynamics of turbomachinery[M].Xi′an:Xi′an Jiaotong University Press,2016.
[6]中国石油和石化工程研究会.炼油设备工程师手册[M].北京:中国石化出版社,2003.China Petroleum and Petrochemical Engineering Institute.Refining equipment engineers handbook[M].Beijing:China Petrochemical Press Co.Ltd.,2003.
[7]王洪光.焊接检验[M].北京:机械工业出版社,2011.WANG H G.Welding inspection[M].Beijing:China Machine Press,2011.
[8]王洪光.实用焊接工艺手册[M].北京:化学工业出版社,2014.WANG H G.Handbook of practical welding process[M].Beijing:Chemical Industry Press,2014.
[9]约翰C利波尔德.焊接冶金与焊接性[M].北京:机械工业出版社,2017.John C Lippold.Welding metallurgy and weldability[M].Beijing:China Machine Press,2017.
[10]张其枢.不锈钢焊接技术[M].北京:机械工业出版社,2015.ZHANG Q S.Welding technology of stainless steel[M].Beijing:China Machine Press,2015.
[11]张义.异种金属焊接技术[M].北京:机械工业出版社,2016.ZHANG Y.Welding of dissimilar metals[M].Beijing:China Machine Press,2016.
[12]刘中青.异种金属焊接技术指南[M].北京:机械工业出版社,1997.LIU Z Q.Technical guide for welding of dissimilar metals[M].Beijing:China Machine Press,1997.
[13]李亚江,刘强,王娟.焊接质量控制与检验[M].北京:化学工业出版社,2005.LI Y J,LIU Q,WANG J.Welding quality control and inspection[M].Beijing:Chemical Industry Press,2005.
[14]秦大同,谢里阳.现代机械设计手册[M].北京:化学工业出版社,2011.QIN D T,XIE L Y.Handbook of modern mechanical design[M].Beijing:Chemical Industry Press,2011.
[15]中国石油集团渤海石油装备制造有限公司.一种烟气轮机的进气锥及烟气轮机:2014205815413[P].2014-10-09.CNPC Bohai Equipment Manufacturing Co.Ltd.The intake cone of a gas expander and the gas expander:2014205815413[P].2014-10-09.