旋塞阀内衬剥落腐蚀的分析与处理

:10025855(2010)04003703:(1984-),,,,,(,277527)分析了普通型PTFE内衬旋塞阀在醋酸系统合成反应釜自循环管线上应用时出现内衬损坏的原因,介绍了T475材料的性能和特点,论述了采用T475替代原有的普通型PTFE内衬和改变旋塞阀内部结构的方法;PTFE;T475;;;;:TH134:AAnalysisandsettlementofliningdroppingofftheplugvalveXUEZiwen,YANGDonghui(YankuangCathayCoalChemicalsCo.,Ltd,Tengzhou277527,China)Abstract:AnalysescausesofliningbreakdownofgeneraltypesofPTFEliningsforplugvalveinselfrecyclingpipelinesofsyntheticreactorsofaceticacidsystem,introducespropertiesandcharacteristicsofT475materia,ldiscussesthemethodsofadoptingT475toreplaceoriginalgeneraltypesofPTFEliningsandchangingtheinnerstructureofplugvalves.Keywords:cock;PTFE;T475;coldflow;heatexpansion;tensilestrength;elasticmodulus130,185~195,28~40MPaPTFE,2~3,,,2(1),,,,,,,,,,,,(),,,(2),(8in(200mm)10in(250mm)),,,,,,,372010年第4期阀门F,(3),,,,,,,,,,,,,,(1a),,,PTFE,,,(1b)123(a)(b)1(4)123(a)(b)2PTFE19302PTFE,12%30PTFE,C-C,301910%PTFE,PTFE1930,,(2a),,(2b),(5)PTFEPTFE,100100,100(3a)PTFE,252525,PTFE,,,(3b)PTFE,(3c)38阀门2010年第4期(a)-(b)-(c)-3PTFE3PTFE,(a)-(b)(c)-(100,100)(d)-4T475PTFE(1)T475PTFET475(4),300,,PTFE,T475(4a)15N/mm223,100h,PTFET475PTFE2~3(4b)PTFE,T475,25%PTFE(4c)150,PTFE,,,T475,,T475PTFE(4d)T475PTFE,,(2),(5)1235,,,(45)392010年第4期阀门(5),,(6),,,,(7),1%(8),4,,,,(1),,(),,(2),,(3)(4),,,,(5),5,,,(!!!!!!!!!!!!),,,,,6,,,,,,,∀1#.∀M#.:,2006.∀2#.()∀M#.:,2004.∀3#()∀S#.:,2004.(收稿日期:20090918)(39),,,,4T475PTFE,,∀1#CzerwiecT.low-pressure,high-densityplasmanitriding;mechanisms,technologyandresults∀J#.SurfaceandCoatingTechnology,1998.∀2#GB/T1040-1992.,1992.∀3#.[J].,2006(1):46-48.∀4#,,.PTFE[J].,2007(1):29-30.(收稿日期:20091221)452010年第4期阀门