Plhaub thiab tube exchangers muaj ib tug xov tooj ntawm cov hlab mounted nyob rau hauv lub plhaub. Ib qho dej ntws los ntawm cov hlab ntsha (tube sab) thaum lwm qhov ntws tawm sab nraud ntawm cov hlab ntsha (plhaub sab). Baffles yog siv rau ntawm lub plhaub sab kom ua rau muaj kev kub ntxhov, tiv thaiv stagnation thiab txhim kho cov cua sov hloov pauv.
Cov txheej txheem tu yuav sib txawv nyob ntawm seb cov kua dej siv hauv qhov system. Piv txwv li, thaum dej nyob hauv ib qho system, koj tuaj yeem muaj ntau yam kev saib xyuas nyob ntawm seb cov ntxhia hauv dej.
FOULING yog tus yeeb ncuab
Fouling yog yeeb ncuab nyob rau hauv ntau lub tshav kub exchangers. Yog hais tias scale pib txheej cov hlab, lub efficiency ntawm chav tsev poob dramatically. Thaum tshav kub kub hloov mus deteriorates li fouling zuj zus. Los ntawm kev saib rau qhov nce siab poob lossis txo qis hauv cov cuab yeej ua haujlwm koj tuaj yeem pom fouling ntxov.
Fouling tuaj yeem ua tau ntau yam. Raws li CSI Designs, "Qhov feem ntau tshwm sim ntawm fouling thiab kev laus hauv kev tu cev poob rau plaub yam tseem ceeb:
Inrustation:tsub zuj zuj ntawm cov crust los yog txheej txheej ntawm cov kua, minerals, los yog cov tshuaj ntxuav nyob rau saum npoo ntawm tshav kub exchanger qhov chaw.
Scaling:ib hom incrustation tshwm sim los ntawm calcium carbonate, calcium sulfate, thiab silicates.
Sediment:los ntawm cov khoom siv corrosion, hlau oxides, silt, alumina, thiab cov kab mob diatomic (microalgae) thiab lawv cov excrement.
Txoj Kev Loj Hlob:Qhov chaw ntawm biofouling suav nrog cov kab mob, nematodes, thiab protozoa. "
CLEARING TUBE BLOCKAGES
Clearing raj yuav tsum tau ua tsis tu ncua los xyuas kom meej efficiency ntawm chav tsev. Nyob ntawm cov kua siv nyob rau hauv lub plhaub thiab lub raj kub exchanger, qhov zaus ntawm kev ntxuav no yuav hloov.
Yog tias muaj slime los yog algae tsim, siv cov dej kub siab kom tawg nws tawm tuaj yeem ua kom yuam kev (AKA hydro blasting). Rau cov deposits loj ntawm sludge thiab tougher buildups nws yuav tsum tau siv ib tug mechanical txoj kev ntawm tu.
Qhov no suav nrog hlau txhuam los yog siv cov scrapers. Koj tuaj yeem xav txog "rodding" raws li daim ntawv ntawm kev ntxuav ntawm cov khoom siv hluav taws xob me me. Thaum koj siv cov txheej txheem tu txhua yam, koj yuav tsum tau ceev faj kom tsis txhob ua kom puas ntawm cov hlab ntsha los ntawm kev quab yuam ntau dhau.
Thaum kawg, yog tias cov khoom siv tawv tawv, ces siv cov tshuaj ntxuav tes lossis tshuaj ntxuav tes. Thaum koj siv cov tshuaj, nws yog ib qho tseem ceeb kom nco ntsoov xyuas kom meej tias cov tshuaj yog sib xws nrog cov hlab ntsha nws ntxuav.
KEV SAIB XYUAS
Tom qab ntxuav cov hlab, pom pom cov cim qhia ntawm cov dej xau, tawg lossis xeb hauv qhov system. Kev siv cov zas xim yog ib txoj hauv kev los pom cov xau hauv qhov system. Koj tuaj yeem pom cov xau los ntawm kev nias lub plhaub sab ntawm lub system. Qhov no yuav thawb cua los ntawm cov raj uas muaj cov pa tawm.
Yog tias siv cov anodes sacrificial, nco ntsoov xyuas cov phiaj no thaum lub sijhawm kuaj pom thiab. Txoj cai zoo ntawm tus ntiv tes xoo yog tias yog tias ntau tshaj 50% ntawm lub phaj noj tam sim ntawd koj yuav tsum hloov nws.
Kho cov kab mob
Leaks tuaj yeem tshwm sim rau ntau qhov laj thawj thiab tuaj yeem ua rau muaj kev sib kis ntawm cov kua dej. Thermal qaug zog feem ntau yog ua rau thiab tshwm sim thaum muaj qhov kub thiab txias sib txawv hauv lub plhaub thiab cov hlab. Hauv qab no yog ob peb txoj hauv kev uas peb tuaj yeem txhim kho cov xau hauv lub plhaub thiab lub raj cua kub exchangers.
TUBE THIAB TUBE SHEET kho
Thaum lub raj muaj nws lub foob rau lub raj ntawv los xoob, koj tuaj yeem pib los ntawm kev sim rov yob lub raj. Yog tias qhov ntawd tsis yog ib qho kev xaiv vim muaj kev txwv kev nthuav dav, hlaws lossis vuam yuav tsim nyog. Yog tias pom cov dej ntws tawm ntawm cov ntawv raj nws tus kheej, vuam feem ntau yuav tsum tau kho qhov teeb meem.
PLUGING TUB
Los ntawm kev ntsaws lub raj, koj tuaj yeem tiv thaiv kom tsis txhob cuam tshuam rau lwm qhov ntawm lub cev. Qhov no txawm li cas los xij hloov tag nrho tus nqi ntws thiab txo qhov ua haujlwm ntawm qhov system. Qhov no tuaj yeem yog qhov kho tau zoo ib ntus, tab sis koj yuav tsum sim thiab txwv kev siv cov plugs hauv koj lub cev.
RE-TUBING
Raws li cov raj muaj hnub nyoog, nws yuav ua rau kev txiav txim siab tshem cov hlab qub thiab hloov lawv nrog cov tshiab. Txawm li cas los xij, qhov no yuav xav kom lub tsev nyob qis qis rau lub sijhawm txuas ntxiv.
Shell and Tube Heat Exchanger Maintenance Checklist
1. Depressurize chav tsev
2. Ntxuav tawm lub taub hau thiab txhuam cov ntawv raj
3. Cov raj ntshiab ntawm txhua qhov thaiv (qhov no kuj tseem tuaj yeem siv cov kua qaub, dej siab, xyaum rods, scrapers, calcite cleaners lossis scale remover)
4. Saib xyuas cov dej xau
5. Hloov cov gaskets
6. Txheeb xyuas qhov ntsuas qhov ntsuas siab thiab ntsuas ntsuas qhov tseeb
7. Tshawb xyuas thiab ntxuav cov lim dej yog tias muaj.
8. Tshawb xyuas cov khoom siv kev nyab xeeb
9. Ntxuav sab nrauv raws li xav tau
10. Tshawb xyuas kev ua haujlwm ntawm Sump Tank
11. Tighten tag nrho cov neeg kho tshuab kev sib txuas kom pom zoo torques
