摘要
锦州石化公司第３套催化裂化装置分馏系统蒸发器由于贴胀质量不好及管子与管板间的连接焊缝开裂，造成了蒸发器内漏；由于外头盖八角垫的残余变形和梯形槽密封面受损，造成了蒸发器外漏。清除管板上的裂纹、堆焊５ｍｍ厚的１Ｃｒ１８Ｎｉ９Ｔｉ并经热处理，将换热管由原来的１０号钢改为１Ｃｒ１８Ｎｉ９Ｔｉ无缝钢管，进行强度焊加贴胀，解决了蒸发器的内漏问题；将原来的八角垫改为波齿复合垫片，解决了蒸发器的外漏问题。经上述改动后，收到较好的效果。
ThejointweldsbetweentubesandtubesheetofevaporationarecrackedduetobadexpandingqualityandtheycauseinternalleakageinevaporatorofthethirdcatalysticcrackingunitforJinzhoupetrochemicalcompany.Owingtotheresidualdeformationofexternalheadoctangonalgasketanddamageoftrapezoidgroovesealingface,theevaporatorisexternalleakage.Afterremovingthecrackfromtubesheet,overlay1Cr18Ni9Tisteelof5mmandundergoheattreatment,changeheatexchangetubefromoriginal10#steelto1Cr18Ni9tiseamlesssteeltube,makestrengthweldandslightexpansion,theinternalleakageofevaporatorissolved.Substitutetheoriginaloctangonalgasketbycombinedcorrugatedgasket,theexternalleakageofevaporatorissolved.
出处
《石油化工设备技术》
CAS
1999年第3期8-10,共3页
Petrochemical Equipment Technology
关键词
蒸发器
泄漏
重油
催化裂化
分馏
Evaporator,Leakage,Reasonanalysis,Improvement
