Nyob rau hauv ib tug cua sov system, lubphaj kub exchangerua zoo li lub cav ua lub luag haujlwm rau kev xa thiab xa tawm thermal zog, tsis tu ncua hloov cua sov los ntawm ib sab ntawm qhov system mus rau lwm qhov.
Tab sis koj puas tau ntsib tej teeb meem no?
Thaum tshav kub kub hloov efficiency dheev poob rau tsis pom tseeb yog vim li cas?
Lub qhov hluav taws xob dej ntws ua qeeb qeeb thiab qeeb?
Koj qhib lub tshav kub exchanger thiab pom tias qee daim hlau tau ua tsis muaj xim, blackened, los yog blistered?
Yog tias muaj, koj tuaj yeem cuam tshuam nrogcorrosion nyob rau hauv lub phaj kub exchanger.
Qhov no tsis yog ib qho teeb meem me. Yog tias corrosion tsis kho kom zoo, kev ua haujlwm kub hloov mus ntxiv tuaj yeem poob mus ntxiv. Hauv qhov xwm txheej hnyav, nws yuav ua rauCov dej xau, kev sib kis kab mob, lossis txawm tias cov khoom tawg thiab kev kaw tsis tau npaj tseg.
Yog li hnub no, cia peb saib ze dua ntawm ib lo lus nug tseem ceeb:
Thaum corrosion tshwm sim nyob rau hauv lub phaj kub exchanger, nws yuav tsum tau kho kom zoo li cas? Thiab yuav ua li cas thiaj tiv thaiv kom tsis txhob muaj teeb meem qub?
I. Ua ntej, nkag siab qhov ua rau: Vim li cas Plate Heat Exchangers Corrode?
Ua ntej txiav txim siab yuav kho qhov teeb meem li cas, koj yuav tsum nkag siab tias qhov twg ua rau nws.
Vim li cas lub phaj kub exchanger corrode? Feem ntau, lub hauv paus ua rau poob rau hauv peb pawg hauv qab no.
1.1 Corrosion Ua los ntawm cov kua dej
Qee lub tshuab siv dej los yog lwm yam kua dej uas muaj cov tshuaj corrosive xws lichloride ions, sulfides, thiab organic acids.
Thaum cov tshuaj no nyob rau hauv kev sib cuag nrog stainless hlau daim hlau rau ib lub sij hawm ntev, lawv muaj peev xwm maj mam tua cov hlau nto thiab nws thiaj li ua rau mob hnyav.
Nws zoo ib yam li qhov txuas ntxiv mus rau cov dej qab zib acidic tuaj yeem ua rau cov hniav enamel. Nyob rau tib lub sijhawm, cov khoom yuav tsis muaj zog thiab yooj yim rau kev puas tsuaj.
1.2 Electrochemical Corrosion
Electrochemical corrosion yog tshwj xeeb tshaj yog tshwm sim thaum sib txawv hlau nyob rau hauv kev sib cuag nrog ib leeg nyob rau hauv ib tug conductive dej ib puag ncig.
Qhov sib txawv ntawm cov hluav taws xob muaj peev xwm ntawm cov hlau ua rau cov hluav taws xob me me ntws, tsim cov anode thiab cathode thiab ua raugalvanic corrosion kuj.
Ib qho piv txwv yooj yim yog tso hlau thiab tooj liab hauv dej. Sij hawm dhau mus, cov hlau ua cov hlau uas nyiam tshaj tawm tsam, tawm hauv qhov pits thiab tsis sib xws ntawm nws qhov chaw.
1.3 Localized Pitting lossis Crevice Corrosion
Thaum cov chaw tso nyiaj, nplai, lossis qhov chaw nyob ruaj khov nyob hauv lub tshuab hluav taws xob, lawv tuaj yeem tsim cov cheeb tsam micro-ib puag ncig.
Cov cheeb tsam no tuaj yeem tsim muaj ntau dua cov tshuaj corrosive, ua raulocalized corrosion, tshwj xeeb tshaj yog pitting lossis crevice corrosion.
Hauv lwm lo lus, corrosion tsis tshua muaj tshwm sim los ntawm ib qho. Nws feem ntau yog qhov sib xyaw ua ke ntawmntev - raug cuam tshuam, xaiv cov khoom siv tsis raug lossis tsim qauv, thiab kev saib xyuas tsis txaus.
II. Koj Yuav Tsum Ua Li Cas Thaum Corrosion tshwm sim? 5 Cov Kev Kho Kom Zoo Tshaj Plaws tau piav qhia
Yog hais tias corrosion yog irreversible, puas yuav kho tau ib tug corroded phaj kub exchanger?
Yog lawm, nws tuaj yeem-tab sis txoj kev kho kom raug yuav tsum raug xaiv raws li qhov ntau thiab hom kev xeb.
Hauv qab no yog tsib txoj hauv kev siv los ntawm cov kws tshaj lij kev saib xyuas, nrog rau lawv cov txiaj ntsig tseem ceeb, qhov tsis zoo, thiab cov ntawv thov tsim nyog.
2.1 Hloov daim Hlau Corroded - Qhov Kev Xaiv Ncaj Ncees thiab Siv Tau
Txoj Cai:
Tshem tawm cov phaj corroded hnyav thiab hloov lawv nrog cov phaj tshiab ntawm tib tus qauv lossis nrog cov ntawv hloov pauv kom raug.
Qhov zoo:
Muab kev kho kom zoo thiab tuaj yeem kho cov cuab yeej ua haujlwm kom zoo
Khaws cov qauv qub thiab kev ua haujlwm ntawm cov khoom siv hluav taws xob
Qhov tsis zoo:
Tus nqi siab heev, tshwj xeeb tshaj yog thaum stainless hlau lossis titanium daim hlau yuav tsum tau
Hloov daim hlau yuav nyuaj rau qhov chaw yog tias cov qauv hloov hluav taws xob qub qub lossis tsis txuas ntxiv
Haum rau:
Localized corrosion cuam tshuam nrog ib tug neeg daim hlau, tshwj xeeb tshaj yog thaum tsuas yog ib tug me me daim hlau puas lawm thiab kho pob nyiaj siv txaus.
2.2 Localized Hlau Txau Kho
Txoj Cai:
Siv cov hlau tiv thaiv los yog ceramic txheej rau thaj tsam corroded los tsim ib qho kev thaiv tiv thaiv corrosion ntxiv.
Qhov zoo:
Tso cai kho hauv zos yam tsis tau hloov tag nrho lub phaj
Tus nqi nruab nrab thiab cov txiaj ntsig tau sai
Qhov tsis zoo:
Txheej adhesion tej zaum yuav raug txwv, ua rau nws tsis tsim nyog rau kev pabcuam ntev - hauv qee daim ntawv thov
Tej zaum yuav txo qis kev hloov pauv hluav taws xob me ntsis
Haum rau:
Me me deg corrosion, kho thaum muaj xwm ceev ib ntus, lossis cov xwm txheej uas cov cuab yeej xav tau nyob twj ywm hauv kev pabcuam rau lub sijhawm luv.
2.3 Siv Anti-Corrosion Txheej
Txoj Cai:
Siv cov txheej txheem corrosion- tiv taus, xws li afluorocarbon lossis epoxy txheej, tshaj qhov cuam tshuam.
Qhov zoo:
Yooj yim rau kev thov
Tus nqi qis
Yuav ua kom qeeb ntxiv corrosion
Qhov tsis zoo:
Txheej thickness tuaj yeem cuam tshuam rau kev hloov hluav taws xob
Cov coatings tuaj yeem tev lossis deteriorate nyob rau lub sijhawm, thiab lawv cov kav ntev yog feem ntau txwv
Haum rau:
Tiv thaiv corrosion los ntawm kev sib kis, tshwj xeeb tshaj yog nyob rau hauv cov khoom siv standby lossis tsis yog - qhov tseem ceeb ntawm cov cua kub hloov pauv.
2.4 Vuam Kho thiab Polishing - Tsuas yog rau Localized, Tsis yog -Perforating Corrosion
Txoj Cai:
Siv cov txheej txheem tshwj xeeb micro- vuam cov txheej txheem los sau cov qhov hauv zos corrosion, ua raws li kev sib tsoo thiab polishing los kho qhov chaw.
Qhov zoo:
Tus nqi qis dua - kev xaiv rau kev ua haujlwm ntev
Khaws cov qauv phaj qub thiab tuaj yeem txo cov khoom siv poob qis
Qhov tsis zoo:
Tsis haum rau kev xeb los yog daim hlau uas twb tau perforated
Yuav tsum muaj cov kws tshaj lij vuam cov kws tshaj lij thiab kev ua haujlwm zoo
2.5 Hloov Tag Nrho Cov Hluav Taws Xob Hluav Taws Xob - Rau Kev Siv Hluav Taws Xob lossis Cov Khoom Siv Zej Zog Thaum Kawg ntawm Nws Lub Neej Kev Pabcuam
Thaum ntau daim hlau tau raug corroded loj, cov gaskets kuj deteriorates, thiab thaum tshav kub kub kev ua tau zoo tau poob qis heev, tus nqi ntawm kev kho txuas ntxiv yuav tsis tsim nyog.
Hauv qhov xwm txheej no,Hloov tag nrho cov khoom siv hluav taws xob tuaj yeem yog qhov kev xaiv zoo dua.
Lub tshuab hluav taws xob tshiab tuaj yeem pab tau:
Txo qhov kev pheej hmoo ntawm cov khoom siv tsis ua haujlwm
Txhim kho qhov system efficiency
Zam kom tsis txhob muaj cov nqi rov ua dua thiab kev poob qis uas cuam tshuam nrog kev rov kho dua
III. Kev tiv thaiv ib txwm tseem ceeb dua li kev kho: 6 cov lus pom zoo
Yog tias koj tsis xav rov ua dua ib qho kev hloov pauv kub hloov pauv txhua txhua xyoo, cov neeg saib xyuas cov nroj tsuag thiab cov pab pawg saib xyuas yuav tsum tau ua tib zoo saib rau 6 qhov kev ntsuas hauv qab no.
Nws raug nquahu kom disassemble thiab tshuaj xyuas cov khoom siv hluav taws xob tsawg kawg ib xyoos ib zaug.
Yog tias pom muaj xeb, pitting, lossis lwm yam cim ntawm corrosion, lawv yuav tsum tau hais kom sai li sai tau.
Tswj lubchloride concentration, pH nqi, thiab hardnessntawm cov dej tuaj.
Thaum tsim nyog, teeb tsa cov cuab yeej kho dej kom tsim nyog los tswj cov dej kom zoo nyob rau hauv qhov kev ua haujlwm uas yuav tsum tau ua.
Kev hloov pauv ntawm qhov kub thiab txias tam sim ntawd tuaj yeem ua kom corrosion thiab ua rau gasket tsis ua haujlwm.
Yog li ntawd, lub tshav kub exchanger yuav tsum tau pib thiab kaw maj mam, tsis txhob cia li hloov nyob rau hauv kev khiav hauj lwm tej yam kev mob.
Tsis txhob siv cov kua qaub uas muaj zog tsis txaus ntseeg thaum ntxuav lub tshav kub exchanger.
Siv ahaum inhibited ntxuav kuatsim los rau kev saib xyuas cov khoom siv hluav taws xob, thiab xyuas kom meej tias cov tshuaj ntxuav tu uas tseem tshuav yog raug nruab nrab tom qab ntxuav.
Cov roj hmab uas muaj hnub nyoog lossis tsis zoo tuaj yeem tso cai rau cov dej noo thiab cov kab mob nkag mus rau hauv cov cheeb tsam hauv cheeb tsam, uas tuaj yeem ua kom muaj corrosion.
Hloov cov gaskets puas los yog muaj hnub nyoog tam sim ntawd kom muaj kev sib khi kom zoo thiab tiv thaiv cov phiaj.
Lub tshav kub exchanger uas kaw thiab khaws cia nyob rau hauv standby cia tseem yuav tsum tau kev tiv thaiv kom raug.
Khaws cov khoom kom raug kaw thiab tiv thaiv los ntawm ya raws kom txo tau qhov kev pheej hmoo ntawm corrosion thiab oxidation thaum lub sij hawm txuas ntxiv ntawm kev siv tsis yog -.
Cov ntsiab lus kawg: Tsis txhob tos kom txog thaum koj pom xeb kom ua
Corrosion nyob rau hauv lub phaj kub exchanger tsis yog ib qho teeb meem ntawm "ib thooj hlau tau rusty." Nws tuaj yeem qhia qhov teeb meem loj dua.
Qhov koj yuav poob yog:
Thaum tshav kub kub hloov efficiency thoob plaws tag nrho chav tsev;
Kev siv hluav taws xob ntau dua thiab muaj kev pheej hmoo ua haujlwm ntau dua thoob plaws hauv lub cev;
Thiab muaj peev xwm, kev ntseeg siab ntawm koj cov neeg siv khoom hauv koj qhov chaw tsim khoom.
Yog li, thaum corrosion tshwm sim, tsis txhob ntshai. Xaiv ib txoj kev kho kom tsim nyog raws li qhov tseeb ntawm cov khoom siv.
Thiab txawm hais tias koj lub tshav kub exchanger tsis pom muaj cov tsos mob ntawm corrosion, tsis txhob cia koj tus neeg saib xyuas. Ua raws li lub sijhawm tshuaj xyuas thiab kev saib xyuas tsis tu ncua.
Ib qhov zoo-paj rwb thaiv tsev kub exchanger tuaj yeem ua tau ntau dua li tsuas yog siv lub neej ntev.Kev saib xyuas kom zoo tuaj yeem pab tiv thaiv kev ua tsis tau zoo, txo cov nqi kho dua, thiab ua kom lub cev ua haujlwm tau zoo rau xyoo tom ntej.
