脱硫再生重沸器失效分析及建议措施  

Failure analysis and recommendation of desulfurization regeneration reboiler

作　　者：林万洲 岳云喆 罗国民 苏晓杰 冯庆 罗斌 LIN Wanzhou;YUE Yunzhe;LUO Guomin;SU Xiaojie;FENG Qing;LUO Bin(PetroChina Southwest Oil&Gas Field CDB Operating Company,Dazhou 636164,China;PetroChina Southwest Oil&Gas Field Natural Gas Purification Plant,Chongqing 400021,China)

机构地区：[1]中国石油西南油气田川东北作业分公司,四川达州636164 [2]中国石油西南油气田天然气净化总厂,重庆400021

出　　处：《石油化工腐蚀与防护》2022年第3期49-54,共6页Corrosion & Protection In Petrochemical Industry

基　　金：中国石油工程建设有限公司:高腐蚀性气田用双金属衬里复合管应用技术研究(CPECC2019KJ13)。

摘　　要：天然气净化厂脱硫单元再生重沸器一般采用热虹吸式重沸器或釜式重沸器,热虹吸式重沸器结构分为立式和卧式。针对某高含硫天然气净化厂立式热虹吸式重沸器运行中存在的管束腐蚀问题,对换热管进行宏观检查和理化分析,结果表明:腐蚀机理为空泡腐蚀,热稳定盐对腐蚀又有促进作用,工艺操作不当对腐蚀加剧有一定影响。提出了脱硫单元再生重沸器腐蚀防护的建议措施。Thermosiphon reboiler and kettle reboiler are generally adopted as regenerative reboiler of desulfurization unit in natural gas purification plant. The structure of thermosiphon reboiler is divided into vertical and horizontal. Regarding the problem of tube corrosion during the operation of vertical thermosiphon reboiler in a high sulfur natural gas purification plant, macro inspection and physical and chemical analysis were conducted. It was found that the main cause of failure is cavitation corrosion, heat stable salt and parameter setting further aggravates the corrosion. Corrosion prevention proposals were recommended for regeneration reboiler of desulfurization unit.

关 键 词：高含硫天然气 热虹吸式重沸器 釜式重沸器 空泡腐蚀 

分 类 号：TE96[石油与天然气工程—石油机械设备]