Dab tsi yog lub luag haujlwm ntawm Fluoropolymer Linings hauv Extending Life of Metallic Heat Exchangers?

Carbon steel plhaub-thiab- tube exchangers tuaj yeem pheej yig dua li txhua yam -fluoropolymer units, tab sis lawv tsis haum rau kev tuav cov kua dej corrosive sab hauv. Lub fluoropolymer hauv ob sab phlu siv rau lub plhaub steel thiab tubesheets muab cov kev tiv thaiv corrosion ntawm PTFE, tab sis nrog lub siab muaj peev xwm ntawm hlau, muab kev xaiv kev lag luam rau ntau cov txheej txheem tshuaj.

Fluoropolymer Lineing Techniques
Muaj ob txoj hauv kev los txuas cov fluoropolymer hauv ob sab phlu rau cov khoom siv hluav taws xob hlau, txhua tus muaj nws cov txiaj ntsig thiab qhov tsis zoo.

PFA (Powder Spray-Applied)
Ib txoj hauv kev nrov tshaj plaws yog tshuaj tsuag - siv PFA hmoov. Thaum lub sijhawm txheej txheem no, ib daim ntawv ntawm perfluoroalkoxy (PFA) yog txau rau ntawm qhov chaw sab hauv ntawm lub tshav kub exchanger. Cov hmoov yog ces qhov cub ci los ua ib qho seamless thiab uniform txheej. Lub thickness ntawm lub hauv ob sab phlu yog feem ntau ntawm 0.5 hli thiab 1.5 hli nyob ntawm daim ntawv thov. Qhov tshwm sim yog ib qho tawv, du txheej ntawm fluoropolymer uas tiv thaiv lub plhaub hlau los ntawm cov khoom corrosive.

Loose-Pib PTFE Sheet
Nyob rau hauv txoj kev siv xoob- kab PTFE daim ntawv, sab hauv ntawm lub plhaub thiab tubesheets yog mechanically fastened los ntawm PTFE los xij. Cov nplooj ntawv no zoo li tuab dua li cov tshuaj tsuag - ntawm PFA txheej thiab tuaj yeem muab kev tiv thaiv me ntsis ntxiv. Cov nplooj ntawv tau ruaj ntseg tiv thaiv kev txav los yog hloov chaw thaum lub sijhawm ua haujlwm tsis tau cov raj hauv cov khoom siv hluav taws xob tseem yog cov khoom fluoropolymer.

Cov txheej txheem ob txheej txheem npog tag nrho cov ntub dej ntawm lub plhaub thiab tubesheets nrog fluoropolymer rau tshwj xeeb corrosion kuj. Nyob rau hauv ob qho tib si cov hlab ntawm lub exchanger tseem yog cov khoom fluoropolymer, yog li cov dej ntws ntawm cov dej sab hauv tsis cuam tshuam los ntawm corrosion.

Fluoropolymer linings zoo
Hauv ob sab phlu hlau kub exchangers nrog fluoropolymer yog ib txoj hauv kev zoo heev los txhawb lawv lub neej thiab muaj ntau qhov zoo:

Tus Nqi Zoo: Cov Fluoropolymer- cov khoom siv hluav taws xob hluav taws xob sib txuas yog qhov tsis tshua muaj nqi qis dua li txhua tus fluoropolymer exchanger thiab yog ib qho kev daws teeb meem zoo rau ntau lub lag luam. Tus nqi no -kev ua tau zoo yog tshwj xeeb yog pab rau cov ntawv thov uas yuav tsum tau muaj kev tiv thaiv corrosion, tab sis qhov siab -kev ua tau zoo fluoropolymer fabrication tsis muaj peev xwm ua tau.

Siab Muaj Peev Xwm: Khoom fluoropolymer exchangers raug txwv hauv lawv lub peev xwm siab. Ib txoj kab sib hloov muaj lub plhaub hlau uas tuaj yeem ua rau qhov ntsuas siab ntau dua. Qhov no ua rau cov kab sib txuas tsim nyog rau cov ntawv thov siab uas qhov kev ncaj ncees ntawm cov qauv yog qhov tseem ceeb.

Corrosion resistance: Lub hauv ob sab phlu muab kev tiv thaiv zoo tiv thaiv ntau yam tshuaj xws li muaj zog acids, alkalis thiab cov kuab tshuaj, muab cov tshuaj tiv thaiv ntawm PTFE hauv cov qauv hlau ruaj khov. Lub exchanger yog zoo dua tiv thaiv corrosion nyob rau hauv lub sab hauv raws li ntev raws li lub hauv ob sab phlu yog nyob rau hauv zoo zoo.

Nyob rau hauv kev xyaum, ib tug lined exchanger yog kev sib haum xeeb ntawm tus nqi thiab kev ua tau zoo. Nws muaj kev tiv thaiv corrosion ntawm ib feem ntawm tus nqi ntawm tag nrho cov - fluoropolymer system, tab sis khaws ntau lub siab thiab cov txiaj ntsig zoo ntawm lub plhaub hlau.

Fluoropolymer Linings Risks
Fluoropolymer linings muaj ntau qhov zoo tab sis kuj muaj qee qhov kev phom sij uas yuav tsum tau tswj:

Pinholes los yog Debonding: Yog hais tias lub hauv ob sab phlu tsim pinholes los yog pib debond los ntawm lub plhaub hlau, corrosive kua yuav ncav cuag cov hlau substrate, tej zaum yuav ua rau sai sai nyob rau hauv -pab corrosion. Qhov corrosion no feem ntau faus yog li nyuaj rau kev pom ua ntej kev puas tsuaj loj.

Kev tshuaj xyuas ib ntus: Kev tshuaj xyuas lub sijhawm yog qhov tseem ceeb rau kev txo qis qhov kev pheej hmoo no. Advanced non-kev kuaj kev puas tsuaj (NDT) cov txheej txheem tuaj yeem siv los tshuaj xyuas cov kab hauv qab kom lav tias nws tseem nyob ruaj khov. Muaj qee cov tsos mob ntawm kev puas tsuaj lossis kev puas tsuaj uas tuaj yeem ua rau tsis ua haujlwm yog tias koj tsis ceev faj, "nws hais.

Qhov kev txhawj xeeb loj tshaj plaws yog ua kom cov fluoropolymer liner tsis zoo thiab ua haujlwm rau lub neej ntawm lub tshav kub exchanger. Exchanger kev ua tau zoo yuav tsum tau ua raws li kev ua haujlwm ntawm kev saib xyuas thiab tshuaj xyuas cov txheej txheem.

Technical teeb meem
Sab hauv Thickness: Cov txheej txheem txheej tuab rau cov tshuaj tsuag PFA yog nruab nrab ntawm 0.5 hli txog 1.5 hli. PTFE daim ntawv hauv ob sab phlu yog feem ntau tsim nyob rau hauv thicker linings rau ntxiv kev tiv thaiv nyob rau hauv ntau xav tau kev pab.

Kev Siv Ib Yam: Cov khoom sib txuas sib txuas tau dav siv hauv kev lag luam tshuaj lom neeg uas muaj kev pabcuam ib puag ncig hnyav thiab kev siv nyiaj ntawm tag nrho -fluoropolymer systems yog txwv tsis pub. Cov kev sib pauv no muab kev sib haum xeeb ntawm tus nqi, kev ua tau zoo thiab kev ntseeg siab rau cov ntawv thov uas muaj cov kua dej tsis zoo.

Fluoropolymer Thaum tshav kub kub Exchangers, Lined vs Khoom Fluoropolymer
Cov lus hauv qab no piv cov khoom fluoropolymer exchangers nrog fluoropolymer -liab hlau exchangers hais txog tus nqi, siab muaj peev xwm thiab corrosion kuj:

Cov Khoom Siv Fluoropolymer-Txheej Txheem Hlau Exchanger Khoom Fluoropolymer Exchanger Tus Nqi qis dua (hlau plhaub) Fluoropolymer (tag nrho chav tsev) Siab dua
Lub peev xwm siab dua (steel plhaub) Lower (tso los ntawm lub zog ntawm cov tshuaj fluoropolymer)
Zoo heev corrosion kuj (yog tias hauv ob sab phlu tsis zoo) Zoo heev (nyob rau hauv ib puag ncig tshuaj)
Txoj kev tu ncua Kev pheej hmoo ntawm qis dua -cov ntaub ntawv corrosion yog cov hauv ob sab phlu Kev puas tsuaj tsawg dua tab sis tus nqi hloov pauv ntau dua
Hauv ob sab phlu Thickness 0.5 hli - 1.5 hli (txhaj tshuaj PFA) Txhua chav tsev yog tsim los ntawm fluoropolymer
Summary thiab
Hauv kev teeb tsa corrosive, kev ua kom lub neej ntev ntawm cov khoom siv hluav taws xob hlau yog qhov tsim nyog thiab cov fluoropolymer hauv ob sab phlu muab cov txiaj ntsig zoo, tus nqi - lwm txoj kev zoo. Lawv muab cov kev tiv thaiv corrosion ntawm PTFE nrog lub siab muaj peev xwm ntawm hlau thiab yog qhov zoo tagnrho rau cov ntawv thov uas xav tau kev tiv thaiv tshuaj lom neeg, tab sis tsis tas yuav muaj fluoropolymer tag nrho. Txawm li cas los xij, kev ncaj ncees ntawm cov ntaub ntawv yuav tsum tau ua tib zoo saib xyuas kom tsis txhob muaj kev puas tsuaj rau corrosion.

Thaum kawg, feem ntau cov kev daws teeb meem engineering yog kev sib pauv ntawm tus nqi, kev ua tau zoo, thiab kev pheej hmoo. Hom fluoropolymer liner yuav tsum raug xaiv raws li daim ntawv thov yuav tsum tau thiab cov tshuaj ib puag ncig, siab tej yam kev mob thiab tu muaj peev xwm.