最新催化装置乙醇胺再生塔底重沸器腐蚀失效原因分析.pdf

催化装置乙醇胺再生塔底重沸器 腐蚀失效原因分析 1 2 1 1 2 1 , , , , , ( 1. , 266071; 2. , 266043) : 对某石化公司催化装置乙醇胺再生塔底重沸器的腐蚀失效原因进行了分析, 据外观检查 材料成分分析微观形貌观察和分析腐蚀产物成分分析及工艺状况和设备检维修调研结果的判 定, 重沸器管束腐蚀失效主要是由于原料中的H S, SO 酸性物质引起的孔蚀和胺液氧化降解所致, 2 2 最后 据失效原因提出了改进措施和建议 : 再生塔; 重沸器; 腐蚀; N - 甲基二乙醇胺溶液 : TQ 05 1; TQ050. 9 : B : 1001- 4837( 2010) 06- 0059- 06 do i: 10. 3969 / j. issn. 1001- 4837. 2010. 06. 012 Corrosion FailureAnalysis ofA Reboiler of Diethanolam ine Regeneration Tower 1 2 1 1 2 1 XU Shu- jian, FAN M ing- xin, IU Xiao- hui, HAN ei, IU Guo- liang, CHAI Yong- xin ( 1. S NOPEC Safety Eng ineering nstitu te, Q ingdao 26607 1, China; 2. S NOPEC Q ingdao P etrochem ical C o. , Ltd. , Q ingdao 266043, Ch ina) Abstract: The corrosion failure causes of a rebo iler of the diethano lam ine regeneration tow er in a certain refinery w as investigated. From the results of spot inspection, elem ent ana lysis of the m aterials, the ob servation and analysis ofm icro- mo rphology, the ingred ients analysis of the corrosion production, and the researches of process cond itions and equipm ent m ain tenance, it w as conc luded that the corrosion fa ilure of reboiler tubes ism a in ly caused by the p itting of the acid ic m ater ia lsH S and SO of raw m ater ia,l and 2 2 the degradation of N - m e thyl d iethano lam ine so lutions. F inally, the co rresponding m easures and sugges tions w ere g ived according to the above resu lts. Key words: regenerat ion tow er; rebo iler; corrosion; N- m ethy l d iethano