油田钢质常压储罐内腐蚀挂片在线检测装置的研制
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摘要
油田钢质常压储罐服役时间长、介质腐蚀性强,导致内腐蚀严重,存在较大的安全隐患。为确认储罐内腐蚀严重层位,指导储罐的维修与腐蚀防护,急需开展常压储罐内腐蚀检测。研制了钢质常压储罐内腐蚀挂片在线检测装置,其检测原理是利用浮漂挂片器实现储罐水油界面、油气界面的腐蚀检测;利用刚性挂片器实现储罐淤泥相、污水相、油相、气相的腐蚀检测;利用与被检储罐材质相同的螺纹连接棒状空心杆实现检测装置的组装及储罐不同高度腐蚀程度的定性连续表征,实现了对同一储罐6个层位腐蚀速率的在线检测。检测结果表明:两个周期腐蚀速率检测值的复现性超过91%,同一储罐挂片检测得到的腐蚀速率与依据该储罐两次超声波壁厚检测结果计算得到的腐蚀速率相吻合,检测结果稳定、可靠。利用常压储罐内腐蚀挂片检测装置可以确定储罐重点内腐蚀部位,及时发现腐蚀隐患,指导储罐的维修更换及靶向腐蚀治理。(图2,表2,参20)
The long service time and the strong corrosive media of steel atmospheric storage tanks in oilfields result in serious internal corrosion, so there is a huge security risk. In order to confirm the seriously corroded positions and guide the maintenance and anti-corrosion operations of storage tanks, it is in urgent need to detect the internal corrosion of steel atmospheric storage tanks. In this paper, the on-line detection device with internal corrosion coupon in steel atmospheric storage tanks was developed. The corrosion detection at oil-water interface and oil-gas interface of storage tanks was realized by using the float coupon. In addition, the corrosion detection in sludge phase, sewage phase, oil phase and gas phase was achieved by using the rigid coupon. What's more, the assembling of detection device and the qualitative continuous characterization of corrosion degree at different heights of the storage tank were realized by using the threadconnected rodlike hollow joint lever whose material is the same as that of the storage tank to be detected. Thus, the online detection of corrosion rate at six phases in the same storage tank was innovatively achieved. It is shown that the reproducibility of the detected corrosion rates in two cycles is over 91% and the corrosion rate detected by the coupons is coincident with that calculated from two detection results by the ultrasonic wall thickness detector in the same tank. It is demonstrated that the detection result is stable and reliable. By virtue of the detection device with internal corrosion coupon in steel atmospheric storage tank, the key internal corrosion positions of the storage tank can be determined and the hidden corrosion dangers can be identified in time, so as to provide the guidance for the maintenance, replacement and targeted corrosion control of the storage tanks.(2 Figures, 2 Tables, 20 References)
The long service time and the strong corrosive media of steel atmospheric storage tanks in oilfields result in serious internal corrosion, so there is a huge security risk. In order to confirm the seriously corroded positions and guide the maintenance and anti-corrosion operations of storage tanks, it is in urgent need to detect the internal corrosion of steel atmospheric storage tanks. In this paper, the on-line detection device with internal corrosion coupon in steel atmospheric storage tanks was developed. The corrosion detection at oil-water interface and oil-gas interface of storage tanks was realized by using the float coupon. In addition, the corrosion detection in sludge phase, sewage phase, oil phase and gas phase was achieved by using the rigid coupon. What's more, the assembling of detection device and the qualitative continuous characterization of corrosion degree at different heights of the storage tank were realized by using the threadconnected rodlike hollow joint lever whose material is the same as that of the storage tank to be detected. Thus, the online detection of corrosion rate at six phases in the same storage tank was innovatively achieved. It is shown that the reproducibility of the detected corrosion rates in two cycles is over 91% and the corrosion rate detected by the coupons is coincident with that calculated from two detection results by the ultrasonic wall thickness detector in the same tank. It is demonstrated that the detection result is stable and reliable. By virtue of the detection device with internal corrosion coupon in steel atmospheric storage tank, the key internal corrosion positions of the storage tank can be determined and the hidden corrosion dangers can be identified in time, so as to provide the guidance for the maintenance, replacement and targeted corrosion control of the storage tanks.(2 Figures, 2 Tables, 20 References)
引文
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[15]龙媛媛,刘晶姝,刘瑾,等.油田钢质常压储罐内腐蚀挂片检测及腐蚀机理研究[J].石油化工腐蚀与防护,2018,35(1):16-19.LONG Y Y,LIU J S,LIU J,et al.Detection and corrosion mechanism study of corrosion coupon inside steel atmospheric storage tank of oil field[J].Corrosion&Protection in Petrochemical Industry,2018,35(1):16-19.
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[17]史玉颖,杨剑锋,刘文彬,等.炼油厂储罐腐蚀检查及防护措施[J].安全与环境工程,2014,21(3):90-93.SHI Y Y,YANG J F,LIU W B,et al.Corrosion inspection and protection measures of storage tanks in oil refinery[J].Safety and Environmental Engineering,2014,21(3):90-93.
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[19]REGE H V,SAND W.Evaluation of biocide efficacy by micro calorimetric determination of microbial activity in biofilms[J].Journal of Microbiological Methods,1998,33(3):227-235.
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[2]李光海.常压储罐检验检测技术[J].无损检测,2010,32(7):509-512.LI G H.Inspection technique of atmospheric storage tanks[J].Nondestructive Testing,2010,32(7):509-512.
[3]许振清,王观军.常压储罐腐蚀原因分析及防护[J].石油化工安全技术,2003,19(3):40-42.XU Z Q,WANG G J.Corrosion cause of atmospheric tank and its protection[J].Petrochemical Safety Technology,2003,19(3):40-42.
[4]赵振宇.油气储罐腐蚀的安全监管建模及应用[J].安全,2016,39(7):10-11.ZHAO Z Y.Safety supervision modeling and application of the corrosion of oil and gas tank[J].Safety,2016,39(7):10-11.
[5]刘雪云,王琳,钟诗胜,等.拱顶罐罐顶腐蚀数据的统计分析[J].中国石油大学学报(自然学科版),2012,36(1):150-153.LIU X Y,WANG L,ZHONG S S,et al.Statistical analysis of corrosion data of vaulted tank roof[J].Journal of China University of Petroleum(Edition of Natural Science),2012,36(1):150-153.
[6]郭江萍.原油储罐内底板腐蚀原因分析[J].石油化工腐蚀与防护,2011,28(5):17-26.GUO J P.Cause analysis of corrosion in bottom plates of crude oil tank[J].Corrosion&Protection in Petrochemical Industry,2011,28(5):17-26.
[7]白新德.材料腐蚀与控制[M].北京:清华大学出版社,2005:353-375.BAI X D.Materials corrosion and control[M].Beijing:Tsinghua University Press,2005:353-375.
[8]刘福斌.污水沉降罐过渡层组分分析与治理方法[J].油气田地面工程,2015,34(8):78-79.LIU F B.Component analysis and treatment method of the transition layer in the sewage settlement tank[J].Oil-Gas Field Surface Engineering,2015,34(8):78-79.
[9]金彦熊,任彦中.大庆油田含油污水沉降罐排泥技术[J].油气田地面工程,2005,24(8):24-25.JIN Y X,REN Y Z.Sludge discharge technique of the oil sewage settlement tank in Daqing Oilfield[J].Oil-Gasfield Surface Engineering,2005,24(8):24-25.
[10]苗成,毛先荣,马骞.降低天然气处理厂回注水油分机杂对策分析[J].石油化工应用,2016,35(7):143-147.MIAO C,MAO X R,MA Q.Natural gas processing plant to reduce the injection water of oil machine complex analysis[J].Petrochemical Industry Application,2016,35(7):143-147.
[11]罗慧娟,孙银娟,成杰.长庆油田原油储罐腐蚀现状与防腐蚀技术[J].腐蚀与防护,2015,36(6):577-581.LUO H J,SUN Y J,CHENG J.Situation of corrosion and anticorrosion technology of oil tanks in Changqing Oilfield[J].Corrosion&Protection,2015,36(6):577-581.
[12]李勇,徐伟.大型储油罐内腐蚀分析及防腐蚀措施[J].石油化工腐蚀与防护,2004,21(5):20-22.LI Y,XU W.Analysis of internal corrosion of large oil storage tank and corrosion protection measures[J].Corrosion&Protection in Petrochemical Industry,2004,21(5):20-22.
[13]孙波.探讨储油罐防腐的施工方法及控制策略[J].全面腐蚀控制,2018,32(6):40-41.SUN B.Discussion on construction methods and control strategies of oil tank corrosion protection[J].Total Corrosion Control,2018,32(6):40-41.
[14]郝明.浅谈储油罐防腐的施工工艺和技术标准[J].全面腐蚀控制,2017,31(12):56-58.HAO M.Discussion on construction technology and technical standard of oil storage tank anticorrosion[J].Total Corrosion Control,2017,31(12):56-58.
[15]龙媛媛,刘晶姝,刘瑾,等.油田钢质常压储罐内腐蚀挂片检测及腐蚀机理研究[J].石油化工腐蚀与防护,2018,35(1):16-19.LONG Y Y,LIU J S,LIU J,et al.Detection and corrosion mechanism study of corrosion coupon inside steel atmospheric storage tank of oil field[J].Corrosion&Protection in Petrochemical Industry,2018,35(1):16-19.
[16]周景宏,程艺兵,吴涛,等.含硫常压储罐腐蚀检测与维修[J].石油化工腐蚀与防护,2015,32(5):26-29.ZHOU J H,CHENG Y B,WU T,et al.Corrosion inspection of atmospheric storage tank for sulfur crude oil and repair[J].Corrosion&Protection in Petrochemical Industry,2015,32(5):26-29.
[17]史玉颖,杨剑锋,刘文彬,等.炼油厂储罐腐蚀检查及防护措施[J].安全与环境工程,2014,21(3):90-93.SHI Y Y,YANG J F,LIU W B,et al.Corrosion inspection and protection measures of storage tanks in oil refinery[J].Safety and Environmental Engineering,2014,21(3):90-93.
[18]YU L,DUAN J,DU X,et al.Accelerated anaerobic corrosion of electro active sulfate-reducing bacteria by electrochemical impedance spectroscopy and chronoamperometry[J].Electrochemistry Communications,2013,26(1):101-104.
[19]REGE H V,SAND W.Evaluation of biocide efficacy by micro calorimetric determination of microbial activity in biofilms[J].Journal of Microbiological Methods,1998,33(3):227-235.
[20]VENZLAFF H,ENNING D,S RINIVASAN J,et al.Accelerated cathodic reaction in microbial corrosion of iron due to direct electron uptake by sulfate-reducing bacteria[J].Corrosion Science,2012,66(1):88-96.