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发布时间：2019-10-22

论文类型：期刊论文

发表时间：2019-09-01

发表刊物：ENGINEERING FAILURE ANALYSIS

收录刊物：EI、SCIE

卷号：103

页面范围：9-19

ISSN号：1350-6307

关键字：Steam jet pump; Failure; CFD simulation; Erosion; Selective corrosion

摘要：The steam jet pump made by SAF 2205 duplex stainless steel (DSS) provides vacuum for vacuum distillation tower to improve the distillation efficiency of crude oil. The pump suffers from severe local wall thinning during service, especially at diffuser section. Failure analysis of the pump is carried out using traditional characterization techniques and computational fluid dynamics (CFD) simulation. The results show that the pump suffer from not only the electrochemical corrosion of acidic droplets forming in HCl-H2S-H2O environment, but also the mechanical erosion by high speed flow with a large value of wall shear stress. A vicious erosion-corrosion circle built by electrochemical corrosion together with mechanical erosion leads to severe damage at the diffuser section of steam jet pump.