| MBR出水管线腐蚀穿孔失效分析 |
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| 引用本文： | 王丽,张艳玲,刘小辉,单广斌.MBR出水管线腐蚀穿孔失效分析[J].石油化工腐蚀与防护,2013,30(4):61-64. |
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| 作者姓名： | 王丽 张艳玲 刘小辉 单广斌 |
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| 作者单位： | 1. 中国石油化工股份有限公司金陵分公司,江苏南京,210033
2. 中国石油化工股份有限公司青岛安全工程研究院,山东青岛,266071 |
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| 摘 要： | 某公司炼油污水经过MBR膜生物反应器处理后,通过普通碳钢管线输送到下游用户回用。两年后回用管线出现腐蚀穿孔现象,至2011年发现漏点100余处。2012年对一段MBR回用水线进行了测厚,实测172个点,测厚数据显示管线平均腐蚀速率为0.398 mm/a,局部腐蚀速率达到了0.757 mm/a。通过水样分析、垢样分析及扫描电镜(SEM)分析等手段对MBR回用管线腐蚀穿孔原因进行了分析,结果表明MBR出水管线腐蚀穿孔主要是由溶液中的溶解氧和溶解盐引起的。
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| 关 键 词： | 膜生物反应器 腐蚀 穿孔 溶解氧 溶解盐 |
Failure analysis of MBR effluent pipelines |
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| Wang Li
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Zhang Yanling
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Liu Xiaohui
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Shan Guangbin.Failure analysis of MBR effluent pipelines[J].Petrochemical Corrosion and Protection,2013,30(4):61-64. |
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| Authors: | Wang Li Zhang Yanling Liu Xiaohui Shan Guangbin |
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| Affiliation: | Wang Li, Zhang Yanling, Liu Xiaohui, Shah Guangbin ( 1. SINOPEC Jinling Petrochemical Company, Nanjing, Jiangsu 210033 ; SINOPEC Qingdao Safety Engineering Institute, Qingdao, Shandong 266071 ) |
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| Abstract: | After treatment in MBR membrane bioreactor, the refinery waste water is delivered to downstream users for reutilization through carbon steel pipelines in SINOPEC Jinling Petrochemical Company. The pipelines failed by corrosion perforation after two years＇ operation, and more than 100 leaking points were found by 2011. The thickness measurements of a MBR effluent reutilization pipe line on 172 points in 2012 showed that the average corrosion rate was 0. 398 mm/a, localized corrosion rate reached 0.757 mm/a. The study of the corrosion leaking causes by water samples analysis, scale analysis, scanning electron microscopy （SEM） analysis has found that the leakage is mainly caused by the dissolved oxygen （DO） and the dissolved salt in the solution. |
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| Keywords: | membrane bioreactor corrosion perforation dissolved oxygen dissolved salt |
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