Ib lub tshuab magnetic flow meter (tseem hu ua electromagnetic flow meter los yog mag meter) ntsuas volumetric flow rate los ntawm kev thovFaraday txoj cai ntawm electromagnetic inductionmus rau ib tug conductive kua txav los ntawm ib tug yeeb nkab. Yog hais tias cov kua dej yog conductive, cov yeeb nkab nyob twj ywm tag nrho, thiab lub installation tiav lawm, lub mag meter muab kev ntsuas txhim khu kev qha uas tsis muaj qhov txav mus los thiab poob siab heev. Yog tias ib qho ntawm cov xwm txheej no ploj lawm, kev siv tshuab sib txawv feem ntau yog qhov zoo dua.
Cov lus qhia no suav nrog lub hauv paus ntsiab lus ntawm kev khiav hauj lwm, cov ntawv thov uas sib nqus flowmeter ua tau zoo tshaj plaws, cov xwm txheej uas lawv tsis ua, thiab cov ntsiab lus ntawm kev teeb tsa thiab qhov loj me uas cais qhov kev teeb tsa zoo ntawm qhov teeb meem.
Dab tsi yog Magnetic Flow Meter?
A magnetic flow meter is a volumetric flow measurement device designed for conductive liquids. Nws generates ib magnetic teb nyob rau hauv cov yeeb nkab bore thiab ntsuas qhov voltage induced thaum ib tug conductive kua dhau los ntawm qhov chaw. Vim tias lub tshuab ntsuas hluav taws xob yog hluav taws xob nkaus xwb, tsis muaj turbines, paddles, lossis lwm yam khoom siv hauv txoj kev ntws los hnav lossis cuam tshuam cov txheej txheem ntws.
Qhov tsis muaj qhov txav mus yog qhov tseem ceeb tshaj plaws vim li cas mag meters tau dav siv hauv kev kho dej, dej khib nyiab, tshuaj lom neeg, slurry tuav, thiab lwm yam.Daim ntawv thov electromagnetic flow meterqhov twg kev ntseeg siab thiab kev saib xyuas tsis tshua muaj teeb meem ntau dua li yuav luag txhua yam.
Lub Magnetic Flow Meter ua haujlwm li cas?
Lub hauv paus ntsiab lus ntawm kev khiav hauj lwm yog ncaj qha los ntawm Faraday txoj cai: thaum cov khoom siv hluav taws xob txav mus los ntawm qhov chaw sib nqus, qhov hluav taws xob yog tsim los ntawm perpendicular mus rau ob qho tib si ntws thiab qhov chaw. Nyob rau hauv ib lub mag meter, coils mounted nyob ib ncig ntawm lub meter raj tsim lub magnetic teb. Raws li cov kua conductive ntws los ntawm qhov chaw ntawd, ib qho hluav taws xob me me tshwm thoob plaws hauv txoj kab uas hla. Ob lub electrodes embedded nyob rau hauv lub raj phab ntsa tuaj tos qhov voltage, uas yog proportional rau qhov nruab nrab kua tshaj tawm. Lub transmitter converts lub teeb liab mus rau volumetric flow rate raws li tus ntoo khaub lig paub-sectional cheeb tsam ntawm lub raj.
Ob qhov tseeb ua raws ncaj qha los ntawm lub hauv paus ntsiab lus no thiab tsim nyog nco ntsoov thoob plaws txhua qhov kev xaiv thiab kev txiav txim siab installation:
Cov kua yuav tsum yog conductive.Tsis muaj conductivity, tsis muaj teeb liab. Qhov tsawg kawg nkaus conductivity pib sib txawv los ntawm cov chaw tsim khoom thiab cov qauv, tab sis ib qho piv txwv yog nyob ib ncig ntawm 5 µS / cm. Qee cov cuab yeej niaj hnub tuaj yeem ua haujlwm ntawm qhov pib qis, tab sis qhov no yuav tsum tau lees paub ib txwm tiv thaiv cov ntaub ntawv tshwj xeeb ntawm cov khoom.
Cov yeeb nkab yuav tsum puv.Qhov voltage-rau- kev ntsuas nrawm suav tias yog tag nrho cov ntoo khaub lig- ntu ntawm cov kua. Yog tias cov yeeb nkab khiav ib nrab khoob, qhov chaw tiv thaiv electrode hloov pauv thiab kev nyeem ntawv yuav tsis ntseeg lossis poob tag nrho. Raws liABB's electromagnetic flowmeter cov ntaub ntawvhais tias, lub 'meter' yeeb nkab yuav tsum tau ua kom tiav thaum ntsuas.
Dab tsi tuaj yeem ntsuas Magnetic Flow Meter?
Mag metres ua haujlwm zoo rau ntau yam ntawm cov kua dej, suav nrog cov dej nyoos thiab dej kho, cov dej khib nyiab thiab cov dej phwj tuaj, cov tshuaj daws teeb meem (acids, bases, brines), pulp thiab ntawv slurries, khoom noj thiab dej haus (kua txiv, mis nyuj, syrups), mining slurries thiab abrasive suspensions, thiab cov txheej txheem tshuaj. Lawv yog cov tshwj xeeb tshaj yog txaus nyiam nyob rau hauv cov kev pab cuam uas cov kua yog qias neeg, abrasive, los yog chemically txhoj puab heev - tej yam kev mob uas yuav sai sai hnav ib tugturbine flow meterlossis lwm yam kev tsim kho tshuab.
Dab tsi Magnetic Flow Meter ntsuas tsis tau
Lub mag meter yog cov cuab yeej tsis raug thaum cov txheej txheem dej tsis yog -conductive. Qhov no txwv tsis pub cov khoom siv hydrocarbons thiab roj av, roj thiab roj, feem ntau cawv thiab cov kuab tshuaj, dej distilled, dej deionized, thiab dej ultrapure. Nws kuj tseem txwv cov pa roj thiab cov pa tag nrho - lub hauv paus ntsiab lus ntsuas yuav tsum muaj kua.
Ib qho yuam kev hauv kev yuav khoom yog xav tias txhua yam dej - raws li cov kua dej tsim nyog. Deionized dej thiab dej ultrapure tau muaj lawv cov ntsiab lus ionic stripped mus rau qhov chaw uas conductivity tsawg dhau rau feem ntau mag meters los tsim ib tug ruaj khov teeb liab. Qhov no yog qhov yuam kev xaiv uas qee zaum tsuas yog tshwm sim tom qab lub ntsuas ntsuas tau teeb tsa. Nco ntsoov lees paub qhov tseeb cov kua dej tawm tsam qhov ntsuas qhov tsawg tshaj plaws, tsis yog tias cov kua dej "zoo li dej."
Vim li cas thiaj xaiv Magnetic Flow Meter? Qhov Zoo Tshaj Plaws
Tsis muaj qhov txav ntawm qhov ntws ntws.
Qhov no yog qhov zoo dua uas ua rau feem ntau ntawm kev txiav txim siab yuav khoom. Tsis muaj impellers, tsis muaj bearings, tsis hnav qhov chaw nyob rau hauv kev sib cuag nrog cov txheej txheem kua. Hauv ibdaim ntawv thov ntsuas dej, lub mag meter ntsia tau zoo tuaj yeem khiav tau ntau xyoo nrog kev saib xyuas tsawg.
Tsawg siab poob.
Vim tias lub 'meter' raj feem ntau yog tag nrho - bore, unobstructed seem, qhov poob siab mus tas li yog negligible. Hauv kev tso dej tawm -cov tshuab hnyav- cov dej hauv nroog loj lossis cov nroj tsuag tshuaj nrog cov yeeb nkab ntev khiav- qhov no txhais ua kev txuag hluav taws xob tiag tiag piv rau cov meters uas txwv txoj kev ntws.
Ua siab ntev rau cov dej qias neeg thiab abrasive.
Slurries, dej khib nyiab nrog cov khib nyiab, thiab cov kua tshuaj lom neeg muaj zog yog tag nrho hauv lub hnab ntawv tsim. Cov khoom siv liner zoo (PTFE, roj hmab, ceramic) tiv thaiv lub raj, thiab cov electrodes tsuas yog cov khoom ntub dej dhau ntawm lub liner nws tus kheej.
Muaj zog raug thaum ntsia zoo.
Tshaj tawm qhov tseeb specifications sib txawv los ntawm cov chaw tsim khoom thiab cov qauv. Qee cov cuab yeej siab - kawg qhia qhov tseeb raws li nruj li ± 0.2% ntawm kev nyeem ntawv, thaum cov qauv kev lag luam feem ntau poob rau hauv ± 0.5% ntau yam. Dab tsi tseem ceeb tshaj li tus lej catalog yog seb qhov kev teeb tsa kev teeb tsa puas tau txhawb nqa qhov kev qhia ntawd- cov ntsiab lus tau hais meej hauv qab no.
Bidirectional ntsuas muaj peev xwm.
Feem ntau mag metres tuaj yeem ntsuas qhov ntws ntawm ob qho tib si yam tsis muaj kev hloov kho kho vajtse, uas muaj txiaj ntsig zoo hauv cov txheej txheem batch lossis cov tshuab nrog lub sijhawm rov qab ntws.
Kev lag luam -Offs thiab txwv
Qhov kev txwv loj tshaj plaws yog qhov yuav tsum tau muaj conductivity. Yog tias cov kua dej tsis muaj hluav taws xob txaus, lub tshuab tsuas tsis ua haujlwm. Tsis muaj kev daws teeb meem rau qhov no - nws yog ib qho tseem ceeb ntawm kev ntsuas txoj cai.
Ib qho kev txwv thib ob yog qhov mag meter ntsuas qhov ntim, tsis yog qhov loj. Yog tias koj tus txheej txheem tswj lossis kev txiav txim siab hloov chaw nyob ntawm huab hwm coj tus nqi lossis cov kua dej ntom ntom, Coriolis meter feem ntau yog qhov kev xaiv tsim nyog. Sim ua kom tau cov huab cua ntws los ntawm mag meter los ntawm kev ntxiv qhov ntsuas qhov sib cais ntxiv qhov nyuaj thiab tsis paub tseeb tias ib qho cuab yeej Coriolis zam.
Ib qho kev txwv thib peb uas feem ntau tsis saib xyuas thaum lub sij hawm engineering: mag meters xav kom cov yeeb nkab kom puv. Nyob rau hauv lub ntiajteb txawj nqus-fed systems, ib nrab sau kab rov tav khiav, los yog kab uas ntws ntawm batches, tus qauv mag meter yuav tsis ua kom raug. Qee cov tuam txhab lag luam muab cov khoob khoob -cov yeeb nkab nrhiav kom tau raws li qhov kev kuaj mob, tab sis qhov no chij qhov teeb meem es tsis daws nws. Yog tias koj tsis tuaj yeem lav tag nrho cov yeeb nkab ntawm qhov ntsuas ntsuas, tshem tawm lub ntsuas hluav taws xob lossis xav txog kev siv thev naus laus zis uas ua rau ib feem ntawm - yeeb nkab tej yam kev mob.
Sib Nqus Flow Meter vs. Ultrasonic vs. Coriolis: Yuav Txiav Txim Li Cas
Kev xaiv ntawm peb lub thev naus laus zis no yog ib qho kev txiav txim siab tshaj plaws ntawm kev ntsuas hauv cov nroj tsuag. Txhua tus muaj qhov pom tseeb qab zib, thiab qhov kev xaiv zoo feem ntau yuav pom tseeb thaum koj teb peb nqe lus nug: Puas yog cov kua ua kua? Kuv puas xav tau volumetric lossis huab cua ntws? Kuv cov kev txwv kev teeb tsa yog dab tsi?
Thaum Magnetic Flow Meter yog qhov haum tshaj plaws
Xaiv ibmas ' meterThaum cov kua yog conductive, koj xav tau volumetric flow, thiab koj xav tau ib tug robust, low -cov cuab yeej tu uas zam cov dej qias neeg los yog txhoj puab heev. Qhov no suav nrog feem ntau ntawm cov dej, dej khib nyiab, thiab kev siv tshuaj lom neeg. Rau feem ntau cov nroj tsuag cuam tshuam nrog cov kua ua kua hauv kab ntau thiab tsawg los ntawm DN10 txog DN2000, mag meter yog qhov pib pib.
Thaum Ultrasonic Flow Meter yog qhov kev xaiv zoo dua
Ibultrasonic flow meterdhau los ua qhov kev xaiv zoo tshaj plaws thaum cov kua tsis yog -conductive, thaum cov yeeb nkab loj heev thiab tag nrho - bore inline meter yog impractical, lossis thaum lubclamp- ntawm kev teeb tsayog xav tau kom tsis txhob txiav rau hauv kab. Clamp- ntawm ultrasonics yog qhov tshwj xeeb tshaj yog muaj txiaj ntsig rau kev kuaj xyuas, ntsuas ib ntus, lossis rov ua dua qhov xwm txheej uas cov txheej txheem kaw rau kev ntsuas ntsuas tsis ua tau. Rau kev sib piv sib sib zog nqus, saib peb phau ntawv qhiaultrasonic thiab electromagnetic flowmeter.
Thaum Coriolis Meter tsim nyog rau kev nqis peev
Coriolis meters ua tau zoo thaum koj xav tau kev ntsuas huab cua ncaj qha, cov ntaub ntawv ceev, lossis qib siab tshaj plaws ntawm qhov tseeb thiab txaus siab them rau nws. Lawv kuj tuav cov kua uas tsis yog -cov khoom siv hluav taws xob. Kev lag luam tawm -tawm yog tus nqi siab dua, hnyav dua, thiab lub cev loj dua hneev taw-tshwj xeeb hauv cov kab loj dua. Rau kev hloov mus rau kev saib xyuas, batching ntawm siab - tshuaj muaj txiaj ntsig, lossis cov txheej txheem uas qhov sib txawv ntawm qhov sib txawv tseem ceeb, Coriolis feem ntau yog txoj cai hu.
Kev sib piv ceev
| Kev ntsuas | Sib nqus | Ultrasonic | Coriolis |
|---|---|---|---|
| Yuav tsum tau ua kua conductivity? | Yog lawm | Tsis muaj | Tsis muaj |
| Kev ntsuas huab hwm coj ncaj qha? | Tsis yog (tsuas yog ntim) | Tsis yog (tsuas yog ntim) | Yog lawm |
| Tsiv qhov chaw? | Tsis muaj | Tsis muaj | Tsis muaj (vibrating tubes) |
| Kov cov dej qias neeg / abrasive? | Zoo heev | Nyob ntawm hom | Txwv nyob rau hauv hnyav slurries |
| Clamp- ntawm kev xaiv muaj? | Tsis muaj | Yog lawm | Tsis muaj |
| Tus nqi txheeb ze (qhov ntau thiab tsawg) | Nruab nrab | Nruab nrab mus rau siab | Siab |
| Zoo tshaj rau | Conductive kua, dej, dej khib nyiab, slurries | Tsis yog-cov kua ua kua, cov kav dej loj, rov ua dua tshiab | Cov dej ntws ntau, qhov ntom ntom, siab -txoj cai hloov pauv raug |
Inline vs. Insertion Magnetic Flow Meters
Sib nqus flow meters tuaj nyob rau hauv ob lub ntsiab configurations, thiab xaiv ntawm lawv yog ib tug loj lo lus nug ntawm cov yeeb nkab loj, pob nyiaj siv, thiab ntau npaum li cas installation yooj koj muaj.
Inline (Full{0}}Ntawm) Meters
Ibinline electromagnetic flow meteryog ntsia raws li ib feem ntawm cov yeeb nkab. Nws pom tag nrho tus ntoo khaub lig- ntu ntawm ntws thiab yog tus qauv xaiv rau feem ntau cov ntawv thov txog li DN600. Vim hais tias qhov ntsuas npog tag nrho cov bore, qhov tseeb thiab rov ua dua yog feem ntau zoo dua li cov qauv tsim. Upstream ncaj-khiav yuav tsum muaj nruab nrab- feem ntau nyob ib ncig ntawm 5 yeeb nkab diameters ntws thiab 2-3 txoj kab uas hla hauv qab, tab sis qhov no txawv ntawm cov qauv thiab hom kev cuam tshuam txog dej ntws.
Insertion Meters
Ibinsert mag metertso ib qho kev sojntsuam los ntawm tus kais dej hauv cov yeeb nkab phab ntsa. Qhov kev teeb tsa no yog qhov txaus nyiam tshaj plaws nyob rau hauv loj - txoj kab uas hla (DN600 thiab siab dua) qhov twg tag nrho - meter bore yuav hnyav heev, kim, thiab nyuaj rau nruab. Qee cov qauv tsim muaj xws li kub- coj mus rhaub lossis thim rov qab cov txheej txheem uas tso cai rau kev teeb tsa thiab tshem tawm yam tsis tau kaw txoj kab - qhov zoo tshaj plaws hauv cov kav dej xa dej lossis lwm lub tshuab uas lub sijhawm poob qis.
Kev lag luam tawm -tawm yog tias qhov ntsuas ntsuas ntsuas ntsuas nrawm ntawm ib lossis ob peb lub ntsiab lus es tsis yog hla tag nrho cov bore, yog li nws muaj kev nkag siab ntau dua rau kev cuam tshuam qhov profile. Upstream ncaj nraim -khiav yuav tsum tau ntev npaum li cas -feem ntau 15–20 yeeb nkab diameters los yog ntau tshaj. Yog hais tias cov kav dej ntws ntws muaj xws li lub luj tshib, li qub, lossis cov twj tso kua mis ze rau qhov ntsuas ntsuas, ib qhoinsertion type meterxav tau kev soj ntsuam kom zoo.
Yuav Ua Li Cas Loj Qhov Sib Nqus Flow Meter kom raug
Ib qho yuam kev tshaj plaws hauv mag meter procurement yog sizing los ntawm cov yeeb nkab kab ib leeg. Ib tug kws ua haujlwm cog ntoo hais tias "peb muaj 6- kab" thiab xaj 6-nti 'meter'. Feem ntau, qhov ntsuas qhov ntsuas qhov ntsuas qhov ntsuas qhov ntsuas qhov ntsuas qhov ntsuas qhov tseeb, ua rau cov dej ntws qis los ntawm lub ntsuas ntsuas thiab degraded qhov tseeb-tshwj xeeb tshaj yog qhov kawg ntawm qhov ntws.
Txoj hauv kev kom raug yog pib nrog cov txheej txheem ntws cov ntaub ntawv:
Sau cov tswv yim no ua ntej:Tus nqi khiav lag luam ib txwm muaj, qhov tsawg kawg nkaus uas yuav tsum tau txaus siab, qhov siab tshaj plaws yuav tsum tau khiav tawm, cov dej conductivity (kuaj, tsis xav), cov dej kub thiab cov tshuaj muaj pes tsawg leeg, cov khoom siv yeeb nkab thiab qhov loj me, thiab muaj ncaj nraim khiav mus rau sab saud thiab qis.
Tom qab ntawd phim lub 'meter' rau qhov ntws, tsis yog cov yeeb nkab.Lub mag meter ua tau zoo tshaj plaws thaum cov dej tawm los ntawm lub sensor feem ntau yog nruab nrab ntawm 1 thiab 5 m / s rau feem ntau cov kua huv, thiab 2-4 m / s rau abrasive slurries. Yog tias qhov ntsuas nrawm ntawm koj tus nqi ntws ib txwm qis dua 0.5 m / s, lub 'meter' yuav loj dua. Yog hais tias nws siab tshaj 7-8 m / s, liner yaig thiab siab poob yuav muaj kev txhawj xeeb. Nws yog qhov ua tau zoo kawg nkaus -thiab feem ntau tsim nyog- rau nruab ib lub 'meter' ib lossis ob qhov loj dua li kab, siv concentric reducers rau kev hloov.
Yog xav paub ntxiv txog kev xaiv qhov kev teeb tsa zoo, saib peb cov peev txheej ntawmCov ntsiab lus tseem ceeb rau kev xaiv lub ntsuas hluav taws xob electromagnetic.
Installation Cov kev coj ua zoo tshaj plaws uas muaj teeb meem tiag tiag
Lub hauv paus ntsiab lus ntsuas ntawm mag meter yog qhov muaj zog, tab sis kev teeb tsa tsis tu ncua tuaj yeem cuam tshuam txawm tias qhov ntsuas zoo tshaj plaws. Hauv kev xyaum, feem ntau mag meter kev ua haujlwm tsis txaus siab taug qab mus rau ib qho ntawm ob peb teeb meem kev teeb tsa- tsis yog rau lub 'meter' nws tus kheej.
Khaws cov yeeb nkab kom puv -Nco ntsoov
Qhov no yog ib qho tseem ceeb tshaj plaws txoj cai installation. Lub 'meter' yuav tsum tau muab tso rau ntawm ib qho chaw nyob rau hauv cov kav dej uas lub raj nyob twj ywm tag nrho cov kua nyob rau hauv tag nrho cov kev ua hauj lwm zoo. Qhov zoo tshaj plaws txoj hauj lwm yog nyob rau hauv ib tug ntsug khiav nrog upward flow, los yog nyob rau hauv ib tug kab rov tav khiav ntawm ib tug tsawg point nyob rau hauv lub system. Tsis txhob txhim kho rau sab saum toj ntawm cov yeeb nkab koov, ntawm qhov tso tawm ntawm lub ntiajteb txawj nqus ntws, lossis nyob qhov twg cov kab yuav khiav ib nrab ntawm cov khoom siv. Yog tias koj tsis paub meej tias cov yeeb nkab nyob twj ywm tag nrho, tej zaum nws tsis yog, thiab koj yuav tsum tau hloov lub 'meter' los yog ntxiv cov khoom siv downstream backpressure.
Tiv thaiv Flow Profile
Mag meters tsis tshua muaj kev cuam tshuam rau kev cuam tshuam ntau dua li ntau lwm cov thev naus laus zis, tab sis lawv tsis muaj kev tiv thaiv. Kev swirl loj, asymmetric flow, los yog turbulence los ntawm li qub, twj, los yog fittings ze rau ntawm ntug dej yuav degrade raug. Cov lus qhia dav dav rau inline meters yog qhov tsawg kawg nkaus ntawm 5 yeeb nkab diameters ntawm ncaj, tsis muaj kev cuam tshuam cov yeeb nkab ntws thiab 2-3 txoj kab uas hla hauv qab. Yog hais tias ib feem qhib lub valve los yog lub twj tso kua mis tawm yog kaw nyob rau hauv cov dej ntws, xav txog kev ntxiv ncaj nraim khiav los yog txhim kho cov dej txias. Yog xav paub ntxivncaj yeeb nkab seem xav tau, sab laj cov 'meter''s installation phau ntawv.
Tau txais Txoj Cai Kev Nyab Xeeb
Qhov no yog qhov nthuav dav ntawm kev teeb tsa uas feem ntau tsis quav ntsej- thiab feem ntau yog qhov ua rau tsis muaj kev piav qhia lub suab nrov lossis drift. Lub induced voltage nyob rau hauv ib tug mag meter yog nyob rau hauv lub millivolt ntau yam. Yog tias tsis muaj peev xwm siv tau zoo ntawm cov kua dej thiab cov electrodes, lub suab nrov ntawm cov twj tso kua mis, VFDs, lossis lwm yam khoom siv cog tuaj yeem cuam tshuam cov teeb liab ntsuas.
Thaum lub 'meter' raug ntsia rau hauv cov hlau, cov kav dej hauv av, cov yeeb nkab nws tus kheej feem ntau muab cov av tsim nyog. Thaum cov kav dej tsis yog -conductive (PVC, HDPE, fiberglass, lined yeeb nkab), cov rings hauv av los yog av electrodes yuav tsum tau muab tso rau ntawm lub 'meter' flanges los tsim kev sib cuag ntawm cov kua thiab lub meter's reference av. Kev hla cov kauj ruam no ntawm cov yeeb nkab yas yog ib txoj hauv kev txhim khu kev qha tshaj plaws los lav qhov nrov nrov, nyeem tsis ruaj khov. Yog xav paub ntxiv, nyeem txogvim li cas electromagnetic flow meters yuav tsum tau grounded.
Tsis txhob nqus cov twj tso kua mis
Kev txhim kho lub mag meter ntawm qhov nqus ntawm lub twj tso kua mis centrifugal txaus ntshai ua rau cov kab rau qhov tsis zoo, uas tuaj yeem ua rau cov kab delamination lossis tawg thaum lub sijhawm. Nws kuj tseem tuaj yeem qhia cavitation- ntsig txog huab cua npuas uas cuam tshuam qhov ntsuas. Qhov chaw nyiam tshaj plaws yog downstream ntawm lub twj tso kua mis, tom qab ib qho kev kuaj xyuas valve, qhov twg lub siab yog qhov zoo thiab cov dej ntws ruaj khov dua.
Kev xaiv ntau thiab kev teeb tsa yuam kev-Nqe los ntawm Feem ntau lawv tshwm sim tiag tiag
Tom qab xyoo dhau los ntawm kev paub dhau los ntawm kev siv dej, tshuaj, thiab kev lag luam, cov no yog qhov yuam kev uas tshwm sim ntau zaus, kwv yees li qhov peb pom ntau npaum li cas:
Sizing los ntawm cov yeeb nkab txoj kab uas hla es tsis txhob ntws ntau.
Qhov no yog qhov feem ntau yuam kev ntawm kev yuav khoom. Ib lub 'meter' loj ntawm qhov qis tshaj nyeem tsis zoo thiab yuav tsis ua raws li cov lus qhia raug tshaj tawm.
Txhim kho qhov twg cov yeeb nkab tsis nyob puv.
Lub ntiajteb txawj nqus-fed kab, ntws headers, thiab saum cov yeeb nkab arches yog nquag ua txhaum. Qhov kev nyeem ntawv tsis tu ncua thiab lub tswb tsis tseeb tsim kev hu xov tooj ntau dua li yuav luag txhua qhov teeb meem.
Tsis quav ntsej grounding ntawm cov yeeb nkab uas tsis yog{0}}hlau.
Qhov no tsim cov teeb liab suab nrov uas ua rau lub meter faulty. Nws yog tag nrho tiv thaiv nrog grounding rings uas raug nqi ib feem ntawm tus nqi 'meter'.
Xaiv cov thev naus laus zis rau cov kua dej tsawg - conductivity.
Cov pab pawg qee zaum xav tias "nws yog dej, yog li lub mag meter yuav ua haujlwm" yam tsis tau kuaj xyuas qhov conductivity. Deionized dej, siab -purity boiler feedwater, thiab ib co hnyav- dej sib tov tuaj yeem poob qis dua qhov tsawg kawg nkaus.
Tsis txaus upstream ncaj khiav.
Tso lub ntsuas hluav taws xob tam sim ntawd tom qab ib feem qhib npauj npaim valve, lub twj tso kua mis tawm, lossis rov qab - rau - lub luj tshib rov qab qhia txog qhov cuam tshuam ntawm qhov ntsuas qhov ntsuas tsis tuaj yeem kho kom raug.
Rauntau electromagnetic flow meter installation ceev faj, peb cov lus qhia ntxaws ntxaws suav nrog cov xwm txheej ntxiv.
Daim ntawv thov Scenario
Cov dej khib nyiab hauv nroog:Mag metres yog cov cuab yeej siv thev naus laus zis hauv cov chaw kho dej khib nyiab- ntsuas dej nkag, rov ua kom cov sludge, pov tseg cov sludge, thiab cov dej ntws tawm. Cov kua dej yog conductive, feem ntau muaj cov khib nyiab, thiab cov kav dej nyob twj ywm hauv siab. Apuv -dej electromagnetic water flow meterhauv qhov kev pabcuam no tuaj yeem khiav mus rau kaum xyoo lossis ntau dua yam tsis muaj calibration drift ua ib qho kev txhawj xeeb, muab cov liner thiab electrodes tsim nyog rau cov kua dej chemistry.
Chemical dosing kab:Hauv me me - kab kab (DN10–DN50) nqa cov kua qaub, cov hauv paus, lossis cov tshuaj kho mob, lub mag meter nrog PTFE liner thiab Hastelloy lossis tantalum electrodes tuav cov tshuaj raug thaum muab qhov tseeb xav tau rau kev tswj kev noj tshuaj. Qhov tseem ceeb ntawm no yog sib piv cov ntaub ntawv ntub dej rau cov tshuaj lom neeg tshwj xeeb-ib kauj ruam uas qee zaum yuav raug saib tsis taus thaum pawg neeg yuav khoom tsuas yog tsom rau ntawm qhov ntws thiab kab loj xwb.
Loj - taub dej loj:Rau DN600 thiab siab dua, qhov kev txiav txim siab ntawm inline thiab insertion dhau los ua ib qho kev lag luam. Tag nrho - bore meter nyob rau hauv qhov ntau thiab tsawg yog hnyav, kim, thiab yuav tsum tau ib tug crane rau installation. Ib qho ntxig mag meter -los yog aclamp- ntawm ultrasonic meter-tej zaum yuav muab cov lus teb siv tau ntau dua, tshwj xeeb tshaj yog rau cov xwm txheej retrofit uas lub ntsiab tsis tuaj yeem raug tshem tawm ntawm kev pabcuam.
Daim Ntawv Txiav Txim Siab: Puas yog Magnetic Flow Meter Txoj Cai rau Koj Daim Ntawv Thov?
Ua ntej cog lus rau mag meter, ua haujlwm ntawm tsib lo lus nug no. Yog tias koj tuaj yeem teb tau "yog" rau tag nrho tsib, lub ntsuas hluav taws xob sib nqus yog qhov zoo tshaj plaws. Yog tias ib lossis ob lo lus teb yog "tsis yog," koj tseem tuaj yeem ua rau nws ua haujlwm nrog kev tsim kho. Yog tias peb lossis ntau dua yog "tsis muaj," ib qho kev siv tshuab sib txawv- feem ntauultrasoniclos yog Coriolis- tej zaum yuav pab tau koj zoo dua.
1. Puas yog cov kua conductive txaus?Paub meej tias tus nqi conductivity tiag tiag tiv thaiv qhov ntsuas qhov tsawg tshaj plaws. Tsis txhob cia siab rau qhov kev xav txog "dej-raws" kua.
2. Cov yeeb nkab puas yuav nyob puv thaum lub sijhawm ua haujlwm ib txwm muaj?Xav txog kev pib, kaw, qis -load, thiab batch- voj voog xwm txheej, tsis yog qhov ruaj khov- lub xeev tsim rooj plaub.
3. Koj puas xav tau qhov ntim ntim ntau dua li cov dej ntws los yog qhov ntom ntom?Yog tias huab hwm coj los yog qhov ntom ntom yog lub hom phiaj ntsuas qhov tseem ceeb, xav txog Coriolis ua ntej.
4. Cov kev teeb tsa puas tuaj yeem muab cov av tsim nyog thiab ncaj nraim - khiav cov xwm txheej?Tshwj xeeb tshaj yog nyob rau hauv tsis yog -cov kav dej hlau lossis qhov chaw- txwv qhov chaw, xyuas qhov no ua ntej xaj.
5. Puas yog daim ntawv thov tau txais txiaj ntsig los ntawm qhov tsis muaj-tsav- ntu, qis-tsim tu?Hauv kev huv, ruaj khov, tsis yog- cov kev pabcuam abrasive nrog kev nkag tau yooj yim, cov thev naus laus zis yooj yim yuav raug nqi ntau dua - siv tau. Lub mag meter qhov zoo qhia tau meej meej hauv cov kev pabcuam ua kua tawv.
Rau ntxivKev xaiv cov kev xav rau electromagnetic flowmeter, saib peb cov lus qhia ntxaws.
Cov lus nug nquag
Lub ntsuas magnetic flow meter ntsuas tsis yog -cov kua ua kua?
Tsis yog. Lub hauv paus ntsiab lus ntawm kev ntsuas yuav tsum muaj ionic conductivity nyob rau hauv cov kua los tsim ib tug detectable teeb liab. Hydrocarbons, cov roj feem ntau, cov cawv ntshiab, thiab cov dej huv huv heev txhua tus tsis muaj kev ua haujlwm txaus. Rau cov kua uas tsis yog -cov dej conductive, ibultrasonic flow meterlos yog Coriolis meter feem ntau yog txoj kev xaiv.
Puas yog magnetic flow meter xav tau cov yeeb nkab puv?
Yog lawm. Standard mag meters xav tias tag nrho cov yeeb nkab hla -section. Kev sau ib nrab ua rau cov electrodes poob kev sib cuag nrog cov kua dej thiab ua rau tsis muaj kev ntseeg lossis tsis nyeem ntawv. Yog tias koj tsis tuaj yeem ua kom muaj cov yeeb nkab tag nrho ntawm qhov ntsuas qhov chaw, txawm tias hloov lub ntsuas mus rau qhov taw tes hauv qhov system uas muaj tag nrho - cov kav dej muaj nyob, lossis xav txog hom 'meter' tsim rau cov kav dej ib nrab.
Yuav ua li cas yog magnetic flowmeter?
Qhov tseeb txawv ntawm cov qauv thiab cov chaw tsim khoom. Standard industrial mag meters feem ntau muab ± 0.5% ntawm kev nyeem ntawv lossis zoo dua. Cov qauv hwm los ntawm cov tuam txhab loj tuaj yeem ua tiav ± 0.2% ntawm kev nyeem ntawv lossis nruj dua. Txawm li cas los xij, cov kev qhia tshwj xeeb no suav tias yog qhov loj me, cov yeeb nkab tag nrho, tsim nyog ncaj nraim -khiav cov xwm txheej, thiab cov av tsim nyog. Hauv qhov ntsuas ntsuas tsis zoo, qhov tseeb - lub ntiaj teb qhov tseeb tuaj yeem ua qhov phem dua li tus lej catalog txawm tias qhov ntsuas zoo npaum li cas.
Dab tsi yog qhov txawv ntawm qhov sib nqus flow meter thiab ultrasonic flow meter?
Lub ntsuas dej sib nqus yuav tsum muaj cov kua ua kua thiab tau nruab rau hauv kab ua ib feem ntawm cov kav dej. Ultrasonic flow meter tsis xav tau conductivity thiab tuaj yeem ntsia tau raws li clamp- ntawm lub cuab yeej yam tsis tau txiav rau hauv cov yeeb nkab. Mag metres zoo li ua kom cov dej qias neeg thiab abrasive zoo dua. Ultrasonic meters feem ntau nyiam nyob rau hauv cov yeeb nkab loj loj, rau cov uas tsis yog -cov kua dej, los yog qhov uas tsis yog - invasive installation yog ib qho tseem ceeb. Saib peb qhov puvKev sib piv ntawm ultrasonic thiab electromagnetic flowmeterkom paub meej ntxiv.
Thaum twg Coriolis meter yog qhov kev xaiv zoo dua li lub ntsuas ntsuas sib nqus?
Coriolis meters feem ntau yog qhov kev xaiv zoo dua thaum koj xav tau kev ntsuas huab cua ncaj qha, ntsuas qhov ceev ib txhij, lossis qhov ua tau zoo tshaj plaws rau kev saib xyuas hloov pauv lossis siab - cov txheej txheem batch nqi. Lawv kuj ua haujlwm ntawm cov kua dej uas tsis yog - conductive. Kev lag luam tawm - tawm yog tus nqi siab dua thiab lub cev loj dua, tshwj xeeb tshaj yog nyob rau hauv kab ntau dua DN100.
Kuv yuav xaiv li cas ntawm ib qho inline thiab ib qho ntxig magnetic flow meter?
Inline meters yog tus qauv rau feem ntau daim ntawv thov mus txog DN600 thiab muab cov neeg raug zoo dua thiab qis rhiab heev rau ntws profile cuam tshuam. Insertion meters yuav tsim nyog xav txog saum DN600 qhov twg tag nrho -bore meter yog txwv tsis pub kim lossis nyuaj rau nruab lub cev. Yog tias koj xaiv qhov ntxig, npaj rau kev khiav ncaj nraim thiab npaj kom paub tseeb tias cov dej ntws profile. Yog xav paub ntxiv txog kev xaiv ntxig, saib pebinsertion mag meter khoom nplooj.
Thaum kawg Takeaway
Magnetic flow meter yog ib qho ntawm cov cuab yeej siv tau zoo tshaj plaws thiab dav siv rau kev ntsuas cov kua ua kua. Hauv dej, dej khib nyiab, tshuaj lom neeg, thiab slurry daim ntaub ntawv, feem ntau yog lub neej ntawd tshuab rau qhov laj thawj zoo: tsis muaj qhov txav mus los, tsis tshua muaj txij nkawm, muaj zog raug, thiab ua siab ntev rau cov txheej txheem nyuaj.
Tab sis thev naus laus zis tsuas yog xa cov lus cog tseg thaum muaj peb yam xwm txheej: cov kua dej yog cov khoom siv hluav taws xob, cov yeeb nkab nyob twj ywm tag nrho, thiab kev teeb tsa tau ua tiav. Qhov yuam kev kim tshaj plaws yog tsis yuav tus qauv tsis ncaj ncees lawm -nws yog kev yuav cov cuab yeej tsim nyog rau daim ntawv thov tsis raug, lossis txhim kho nws hauv txoj hauv kev uas txwv tsis pub nws ua haujlwm.
Pib nrog cov txheej txheem cov ntaub ntawv -kwv dej conductivity, qhov tseeb ntws ntau yam, yeeb nkab tej yam kev mob, thiab ntsuas lub hom phiaj. Cov plaub inputs yuav qhia rau koj seb lub mag meter yog cov lus teb yog, los yog seb koj yuav tsum tau saibultrasoniclossis Coriolis thev naus laus zis. Yog hais tias lub mag meter yog qhov haum, loj nws los ntawm cov ntaub ntawv ntws, tsis yog cov yeeb nkab txoj kab uas hla, thiab nqis peev lub sij hawm kom tau txais hauv av thiab teeb tsa geometry txoj cai.
