| 减压塔顶湿空冷器的腐蚀与防护 |
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| 引用本文： | 王德胜,张嵘,张伟.减压塔顶湿空冷器的腐蚀与防护[J].石油化工腐蚀与防护,2007,24(2):36-39,48. |
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| 作者姓名： | 王德胜 张嵘 张伟 |
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| 作者单位： | 中国石油天然气股份有限公司玉门油田分公司,甘肃,玉门,735200 |
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| 摘 要： | 针对某石化公司5．0 Mt/a常减压蒸馏装置减压塔顶湿空冷器的腐蚀问题,重点讨论了湿空冷器的腐蚀介质及来源、腐蚀过程及腐蚀形态,指出减压塔顶预冷器及一级空冷器外侧水汽面的腐蚀主要是喷淋水中Cl~-造成的点蚀及垢下腐蚀,一级空冷器内侧是由于H_2S-H_2O引起的腐蚀。在一级空冷器入口前增设中和缓蚀剂和水的注入点,或选用抗拉强度不大于414 MPa的碳钢或碳锰钢,或选用08Cr2AlMo材料,可大大缓解上述部位的腐蚀问题。
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| 关 键 词： | 常减压蒸馏装置 湿空冷器 湿H2S 腐蚀 中和缓蚀剂 |
| 文章编号： | 1007-015X(2007)02-0036-04 |
| 修稿时间： | 2006年12月21 |
Corrosion of Vacuum Tower Overhead Wet Air Cooler and Protection |
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| Wang Desheng,Zhang Rong,Zhang Wei.Corrosion of Vacuum Tower Overhead Wet Air Cooler and Protection[J].Petrochemical Corrosion and Protection,2007,24(2):36-39,48. |
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| Authors: | Wang Desheng Zhang Rong Zhang Wei |
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| Abstract: | On the basis of the corrosion of the vacuum tower overhead wet air cooler of a 5.0 Mt TPY atmospheric-vacuum distillation unit, the corrosion media sources,corrosion process and corrosion forms are discussed.It is concluded that the corrosion of external side of pre- cooler and 1st-stage air cooler is pit corrosion and under-deposit corrosion from Cl~- in spray water,while the corrosion inside of air cooler is the H_2S-H_2O corrosion.The corrosions can be greatly mitigated by injecting neutralization corrosion inhibitor at the inlet of 1st- stage air cooler,selecting carbon steel or CMn steel with a tensile strength of less than 44 MPa or 08Cr2AlMo material. |
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| Keywords: | atmospheric-vacuum distillation unit wet air cooler wet H_2S corrosion neutratization corrosion inhibitor |
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