Cov hlau bellows uas haum rau thermal zog nyob rau hauv ib tug ruaj -tubesheet PTFE exchanger yog ib tug nyias, corrugated siab ciam teb nyob rau hauv tas li ntawd mechanical cycling. Tom qab xyoo ntawm kev nthuav dav thiab kev cog lus, ib qho micro- tsis xws luag tuaj yeem tsim nyob rau hauv ib qho ntawm cov kab hauv plab lossis cov troughs, tsim kom muaj lub qhov dej ntws uas maj mam quaj cov kua dej. Thaum qhov no tshwm sim, kev tshawb pom ntxov thiab kev tswj xyuas kev cuam tshuam ib ntus tuaj yeem tiv thaiv kev nce nrawm mus rau hauv kev kaw tag nrho.
Hauv kev kuaj mob,leaking plhaub expansion sib koom ruaj tubesheet PTFECov xwm txheej raug kho raws li ob qho tib si kev ncaj ncees thiab cov txheej txheem kev nyab xeeb vim yog qhov ncaj qha cuam tshuam ntawm cov kua dej ntawm qhov sib koom ua ke tseem ceeb.
Muaj nuj nqi thiab kev ntxhov siab Profile ntawm Expansion Bellows
Lub plhaub nthuav dav sib koom ua ke hauv qhov ruaj khov -tubesheet exchanger yog tsim los nqus qhov sib txawv thermal expansion ntawm lub plhaub thiab lub raj ntim. Qhov kev hloov pauv no tau ua tiav los ntawm cov hlau corrugated uas tau rov hais dua thaum ua haujlwm.
Thawj Kev Nyuaj Siab Mechanisms
Nyob rau lub sijhawm ua haujlwm ntev, cov hauv qab no raug rau:
Cyclic thermal expansion thiab contraction
Internal pressure fluctuations
Sab nraud corrosion raug
Kev vibration ntawm cov txheej txheem ntws
Kev nyuaj siab concentration ntawm weld cag
Cov khoom sib xyaw ua ke no maj mam txo qhov qaug zog lub neej thiab tej zaum yuav ua rau qhov chaw tawg lossis tsim pinhole.
Kev txheeb xyuas qhov tshwm sim ntawm Bellows Leak
Ib qho me me hauv qhov sib koom ua ke nthuav dav feem ntau hloov maj mam nyob rau theem pib.
Visual and Physical Indicators
Cov txheej txheem kuaj pom muaj xws li:
Cov tee me me ua rau ntawm lub plab sab nrauv
Damp staining nyob rau hauv rwb thaiv tsev los yog tiv thaiv npog
Localized corrosion trails raws corrugation folds
Kev poob siab sib txawv hauv kev saib xyuas cov ntaub ntawv
Qee zaus muaj ntxhiab tsw lossis vapor tso tawm hauv cov kev pabcuam tsis muaj zog
Lub pinhole xau feem ntau nyob rau hauv qhov nruj nruj uas qhov kev ntxhov siab siab tshaj plaws thiab kev tshuaj xyuas kev nkag tau txwv.
Thaum pom tau tias, kev faib tawm tam sim ntawm qhov hnyav yog qhov yuav tsum tau ua, raws li lub tshuab nqus dej ua haujlwm raws li qhov tseem ceeb ntawm ciam teb.
Kev kho thaj chaw ib ntus siv Epoxy
Thaum kaw tsis tau tam sim ntawd, kev tswj xyuas ib ntus yuav raug siv.
Kev npaj deg thiab kev cais tawm
Ua ntej kho, thaj chaw cuam tshuam yog:
Ua tib zoo ntxuav ntawm cov txheej txheem residue
Ua kom qhuav kom ntseeg tau adhesion
Mechanically tshuaj xyuas kom paub meej tias qhov dej xau
Kev npaj saum npoo kom zoo yog qhov tseem ceeb rau kev ua haujlwm sealing ib ntus.
Daim ntawv thov Epoxy Patch
Ib ob -ib feem, tshuaj tiv thaiv epoxy- tau xaiv tshwj xeeb rau kev sib raug zoo nrog cov txheej txheem dej thiab kev ua haujlwm kub- yog siv rau qhov tsis xws luag.
Kev kho yog ua los ntawm:
Nias epoxy ncaj qha rau hauv tus pinhole
Txhim kho cov txheej txheem sab nraud ntawm qhov tsis xws luag
Tso cai rau kev kho tshuaj tag nrho raws li kev ua haujlwm (thaum tso cai)
Txoj kev no tuaj yeem ua kom ruaj khov ib ntus aleaking plhaub expansion sib koom ruaj tubesheet PTFEsystem rau hnub lossis txawm lub lis piam, nyob ntawm qhov kev pabcuam hnyav.
Ib qho epoxy thaj yog ib daim nplaum nplaum rau lub plhaub ua pa, tsuas yog los tuav lub sijhawm luv luv - kom txog thaum kho kom raug.
Kev xav txog kev nyab xeeb
Vim tias cov hauv qab yog lub siab -muaj cov khoom:
Yuav tsum tau saib xyuas tas li
Qhov kev txwv thib ob yuav tsum nyob hauv qhov chaw
Ib qho kev nce hauv cov pa xau yuav tsum ua rau muaj kev nce ntxiv tam sim
Kev kho ib ntus yeej tsis suav tias yog kev daws teeb meem mus tas li.
Lub Tswv Yim Kho Kho Kom Zoo
Ntev- kev kho lub sij hawm yuav tsum tau hloov kho cov khoom seem uas puas lawm.
Bellows Section Hloov
Tus txheej txheem kho mus tas li muaj xws li:
Kev rho tawm thiab ua kom tiav cov kua dej ntawm cov exchanger
Tshem tawm cov rwb thaiv tsev thiab cov npog sab nraud
Txiav tawm qhov puas hauv qab seem
Vuam nyob rau hauv ib tug hloov expansion sib koom ua ke
Txhua qhov kev ua haujlwm vuam yuav tsum tau ua los ntawm tus neeg siv khoom siv, thiab cov khoom siv vuam zoo yuav tsum raug txheeb xyuas.
Kev Ntsuas Kev Ntsuas Siab
Tom qab kho, lub hauv paus sib dhos yuav tsum yog:
Hydrotested los yog pneumatic kuaj raws li tsim qauv
Tshawb xyuas qhov kev ncaj ncees ntawm weld thiab to
Muaj ntawv pov thawj raws li lub siab - khaws cov khoom
Vim tias lub hauv siab yog ib thaj tsam hloov tau yooj yim, tom qab - kho qhov tseeb yog qhov yuav tsum tau ua ua ntej rov qab mus rau qhov kev pabcuam.
Tag Nrho Plhaub Hloov Scenario
Yog hais tias lub expansion sib koom ua ke yog integrally fabricated rau hauv lub plhaub thiab tsis tuaj yeem raug cais tawm, tag nrho lub plhaub yuav tsum tau hloov. Qhov xwm txheej no tsis tshua muaj tshwm sim tab sis tshwm sim hauv cov laus lossis cov qauv sib hloov sib hloov.
Keeb Kwm Analysis
Kev kho yam tsis tau hais txog qhov tshwm sim hauv qab yuav ua rau rov ua tsis tiav.
Cov hauv paus ntsiab lus
Sab nraud chloride-induced corrosion nyob rau hauv rwb thaiv tsev
Internal acid condensation los yog tshuaj tua kab mob
Kev qaug zog los ntawm kev siv thermal ntau dhau
Kev sib dhos tsis raug lossis kev ntxhov siab ntawm kev teeb tsa
Flow-induced vibration
Nyob rau hauv PTFE exchanger systems, mismatched thermal expansion lossis localized hot spots kuj yuav ua rau kom qaug zog ntawm ntu ntu.
Kev nyab xeeb thiab kev pheej hmoo ua haujlwm
Ib qho kev sib txuas sib txuas yog qhov kev txhawj xeeb tseem ceeb ntawm kev nyab xeeb vim nws lub luag haujlwm raws li kev ciam teb siab.
Cov kev pheej hmoo tseem ceeb suav nrog:
Kev tso tawm cov kua dej txaus ntshai
Localized corrosion propagation
Poob qhov system siab ncaj ncees
Unplanned shutdown escalation
Kev ua haujlwm tas mus li yam tsis muaj kev txwv tsis pub suav hais tias yog kev coj ua.
Xaus
Lub tshuab xau hauv qhov ruaj khov -tubesheet PTFE exchanger sawv cev rau qhov tseem ceeb tab sis tswj tau qhov tsis ua haujlwm. Kev tshawb pom ntxov tso cai rau kev tswj xyuas daim ntawv thov ntawm epoxy- raws li kev kho ib ntus, uas tuaj yeem ua haujlwm ruaj khov thiab tswj kev tsim khoom txuas ntxiv rau lub sijhawm txwv. Txawm li cas los xij, ntev - kev cia siab rau lub sij hawm tsuas yog rov qab los ntawm tag nrho cov neeg kho tshuab hloov pauv ntawm kev sib koom ua ke thiab kev ntsuas siab zoo ntawm kev kho lub rooj sib txoos.
Lub plhaub nthuav dav sib koom ua ke ruaj khov PTFE mob underscores qhov tseem ceeb ntawm kev kho lub hauv siab raws li kev ntxhov siab heev, kev nyab xeeb- cov khoom tseem ceeb. Cov ntsiab lus nyias, hloov tau yooj yim ntawm qhov ruaj khov -tubesheet plhaub ua haujlwm raws li lub tshuab ua haujlwm "lub ntsws," thiab yog li yuav tsum tau saib xyuas tas li, cov qauv tsim kom zoo, thiab kev cuam tshuam raws sij hawm thaum kuaj pom qhov degradation.
