Ntsuas Lub Hwj Chim thiab Lub Sij Hawm Ntev: Watt Density Considerations rau 316 Cartridge rhaub

Nyob rau hauv lub ntiaj teb nyuaj ntawm kev lag luam cua sov, 316 stainless hlau cartridge tso cua sov feem ntau xaiv vim lawv tiv taus corrosion heev. Qhov no ua rau lawv zoo tshaj plaws rau cov chaw uas muaj tshuaj lom neeg, dej noo, lossis ntsev ntsev . 316 yog ua los ntawm austenitic alloy nrog 2-3% molybdenum ntxiv. Nws yog qhov zoo dua los tiv thaiv pitting thiab crevice corrosion tshaj 304, ua rau nws zoo heev rau kev siv tshuaj, khoom noj khoom haus thiab dej haus, thiab cov khoom siv hauv hiav txwv. Tab sis txawm tias nrog cov khoom zoo no -, engineers tseem tuaj yeem tsis meej pem thaum muaj tej yam tsis zoo thaum ntxov. Cov ntaub ntawv sheath feem ntau tsis yog qhov teeb meem; Nws yog ib yam dab tsi uas tsis tau: qhov tsis ncaj ncees lawm specification ntawm nto watt ceev. Thaum koj overload lub rhaub nrog kub flux ntau dhau lawm, lub plhaub kub yuav nce mus rau theem uas ua kom cov degradation, uas swb lub hom phiaj ntawm kev siv 316 stainless hlau hauv thawj qhov chaw.

Qhov saum npoo watt ntom ntom, uas ntsuas hauv watts ib square centimeter (W / cm²) lossis watts ib square inch (W / in²), yog tus lej tseem ceeb uas qhia tau hais tias muaj cua sov ntau npaum li cas ntawm lub tshuab cua sov sheath muab tawm ib square centimeter lossis square inch. Tsis muaj teeb meem dab tsi ntawm cov hlau nws yog, nws muaj kev cuam tshuam ncaj qha rau ntawm lub sheath qhov kub thiab txias, uas ua rau muaj kev cuam tshuam rau sab hauv xws li magnesium oxide (MgO) rwb thaiv tsev thiab nichrome kuj hlau. Kev tswj cov watt ceev yog qhov tseem ceeb dua rau lub tshuab cua sov 316 hauv qhov chaw corrosive, qhov kub siab tuaj yeem ua rau cov tshuaj lom neeg tsis zoo. When watt densities are high, the sheath has to operate hotter to get rid of the same amount of power. Qhov no tej zaum yuav ua rau oxidation, thermal qaug zog, los yog rwb thaiv tsev tawg ntev ua ntej corrosion teeb nyob rau hauv. Nyob rau hauv phem heev tshwm sim, qhov no tej zaum yuav ua rau tawg, burnout, los yog qis efficiency, uas yuav ua rau kim downtime thiab hloov.


Rau cov hlau ib txwm siv - cua sov lossis immersion daim ntawv thov, kev lag luam cov qauv raws li kev sim ntau thiab tiag- ntiaj teb kev siv qhia txog qhov nruab nrab watt ntom ntom ntawm 5 txog 7 W / cm² (ib puag ncig 32-45 W ​​/ in²) rau 316 stainless hlau cartridge rhaub. Qhov no ua kom paub tseeb tias cov cua sov tau hloov mus rau qhov nruab nrab ib puag ncig, xws li cov kua dej corrosive, cov tshuaj platen, lossis electroplating da dej, thaum ua kom kub kub hauv qab qhov tseem ceeb, uas feem ntau yog nyob ib ncig ntawm 400-500℃(752-932℃F) kom ruaj khov mus ntev. Nyob rau theem no, lub tshuab cua sov pom qhov sib npaug ntawm kev xa lub zog thiab kev tiv thaiv cov ntaub ntawv. Qhov no ua rau 316 alloy's passive oxide txheej los ntawm kev ntxhov siab dhau, uas yog qhov tseem ceeb rau nws txoj kev tiv thaiv corrosion. Piv txwv li, nyob rau hauv cov tshuaj ua cov nroj tsuag uas heats acidic kua, ua raws li qhov ceev no yuav ua rau cov cuab yeej siv ntev, los ntawm lub hlis mus rau xyoo, vim hais tias qhov kub thiab txias yuav txo qis cov tshuaj tiv thaiv kinetics thiab txo scaling.

Hauv cov xwm txheej hnyav heev, suav nrog cov tshuaj chloride ntau lossis cov kua qaub muaj zog, nws yog qhov zoo dua los xaiv txawm tias qis dua watt ntom, tsawg dua 5 W / cm². Txoj kev ceev faj no txo ​​qis qhov ntsuas kub hauv qhov sib piv ncaj qha rau watt ntom ntom, uas yog qhov sib txawv ntawm thaj chaw saum npoo rau lub zog tso tawm. Lub tsho txias txias tsis tsuas yog ua kom qis qis qis (uas tuaj yeem ua ob npaug nrog txhua 10℃nce, raws li Arrhenius kab zauv), tab sis nws kuj ua rau sab hauv MgO los ntawm kev tawg vim yog cua sov, uas yuav ua rau ya raws thiab teeb meem hluav taws xob. Qhov no tuaj yeem ua rau siv lub tshuab cua sov ntev dua lossis ntau dua ib chav los muab tib lub zog tag nrho, tab sis kev lag luam - tawm hauv cov cua kub ceev feem ntau tsim nyog vim tias cov cua sov kav ntev dua. Cov tshuab compact, zoo li cov tshuaj tua kab mob lossis cov khoom siv semiconductor, yuav xav tau kev tsim qauv zoo vim tias lawv tsis muaj chaw ntau. Tab sis qhov no ua rau lub cev muaj zog. Muaj ob peb lub sijhawm tiag tiag hauv ntiaj teb. Piv txwv li, low-density 316 heaters in seawater desalination facility has lasting 2 to 3 times long than high-density heaters, which means less care in hard-to-reach place.

Nws yog ib qho yooj yim los txiav txim siab watt ntom ntom: tsuas yog faib tag nrho cov wattage los ntawm thaj chaw uas muaj cua sov (π × txoj kab uas hla × ntev ntev, tsis suav nrog cov cheeb tsam uas tsis muaj cua sov). Qhov ceev ntawm 200W 316 cartridge rhaub nrog ib txoj kab uas hla ntawm 8 hli thiab qhov ntev ntawm 100 hli yuav yog li ntawm 200 / (π × 0.8 × 10)=8 W / cm². Qhov no tej zaum yuav siab dhau rau corrosive daim ntaub ntawv, yog li tus tsim yuav tsum tau hloov. Nco ntsoov xyuas tus lej no tiv thaiv qhov tshwj xeeb ntawm daim ntawv thov, suav nrog cov thermal conductivity ntawm cov cua sov nruab nrab (piv txwv li, cov hlau hloov hluav taws xob zoo dua li cov kua dej) thiab cov xwm txheej hauv chav. Finite element tsom xam (FEA) software thiab lwm yam cuab yeej tuaj yeem ua qauv kev thauj mus los, kwv yees qhov kub thiab txias, thiab nrhiav hotspots.

Ua haujlwm nrog cov kws tshaj lij cua sov los ntawm cov tuam txhab xws li Watlow lossis Omega Engineering yog qhov pab tau zoo kom tsis txhob muaj teeb meem. Lawv tuaj yeem tsim thermal profiles, qhia tshwj xeeb teeb xws li dispersed wattage rau txawm cua sov, thiab xyuas kom meej tias cov txheej txheem kev nyab xeeb zoo li UL lossis CE tau ntsib. Thaum koj overspecify watt ceev, koj tsis tsuas yog nkim nyiaj koj siv rau 316 lub siab -end nta, tab sis koj kuj khiav qhov txaus ntshai ntawm scorching nyob ze qhov chaw los yog nkim zog.

Watt ceev yog tus yuam sij rau ntsuas lub zog thiab lub neej ntev hauv 316 lub tshuab cua sov. Los ntawm kev tsom mus rau qhov nruab nrab mus rau qhov ntom ntom uas tsim nyog rau ib puag ncig, cov neeg siv yuav tau txais kev tiv thaiv corrosion feem ntau tawm ntawm cov hlau thaum ua kom nws qhov kev ua tau zoo tag nrho. Txoj hauv kev zoo no hloov pauv qhov kev puas tsuaj mus rau qhov kev cia siab, ntev - lub sijhawm kho uas txhawb kev tsim khoom hauv cov chaw tsim khoom nyuaj. Yog tias koj paub yuav ua li cas tswj watt ntom ntom, koj lub tshuab cua sov yuav ua rau koj ib txwm tau txais txiaj ntsig, txawm tias koj siv nws rau cov tso tsheb hlau luam, kev ua zaub mov, lossis kev tsim khoom.