Tus Kheej -Limiting PTC Polymer Heaters Yuav Ua Li Cas Thiaj Li Ua Raws Li Kev Cai Lij Choj PTFE Immersion Heaters hauv Tsawg-Tsuas Kub?

Ib qho piv txwv PTFE immersion rhaub yuav tsum muaj cov thermocouple sab nraud, PID maub los, SSR thiab cov khoom siv hluav taws xob muaj kev nyab xeeb los tiv thaiv overheating. Tab sis rau ntau yam yooj yim, tsis tshua muaj -kub cua sov ua haujlwm- xws li tuav lub tank me me ntawm cov dej yaug dej sov los ntawm qhov khov, lossis maj mam ua kom sov lub roj ntsha reagent - qhov kev tswj xyuas tiav no yog kev tua ntau dhau. Ib chav kawm tshiab ntawm kev tswj tus kheej PTC (Positive Temperature Coefficient) polymer cua sov cov ntsiab lus tab tom tsim los ua ib qho kev xaiv yooj yim heev. Cov tshuab cua sov no yog qhov tsim nyog, tus kheej - tswj cov resistors uas tuaj yeem ua rau lub cev tsis muaj cua sov, txawm li cas los xij.

Kev Ua Haujlwm ntawm Tus Kheej -Kev txwv PTC Polymer rhaub
PTC polymer rhaub yog tsim los ntawm cov khoom siv hluav taws xob sib xyaw, feem ntau yog cov pa roj carbon -dub puv polymer matrix. Cov yam ntxwv hluav taws xob yooj yim ntawm cov khoom sib xyaw no yog qhov muaj zog tsis muaj -linear nce hauv hluav taws xob tiv thaiv nrog kub. Thaum lub hwj chim yog thawj zaug hloov ntawm cov khoom txias muaj qhov tsis zoo thiab cov tam sim no ntws yooj yim. Cov cua sov ua kom sov. Raws li nws ze rau qhov kev hloov pauv kub (feem ntau ntawm 80℃thiab 100 degree, nyob ntawm kev tsim) cov polymer matrix pib nthuav. Qhov no nthuav tawm lub cev cais cov pa roj carbon conductive, rhuav ntau txoj hauv kev. Qhov kev tiv thaiv tau nce siab heev- feem ntau los ntawm qhov ntau ntawm ntau txhiab- kaw cov hluav taws xob tam sim no tau zoo.

Xws li yog tus cwj pwm ntawm PTC nyhuv. Lub rhaub yuav txo nws tus kheej qhov kub thiab txias. Nws tsis tuaj yeem kub hnyiab tau txawm tias lub tank tsis muaj dab tsi lossis cov kua dej poob qis hauv qab cov cua sov. Nws yuav tsum tsis muaj lwm tus sensor, tsis muaj kev nyab xeeb relay, tsis muaj kev tswj hwm algorithm. Lub tshuab cua sov tsuas yog tig mus rau nws qhov chaw teeb tsa thiab tuav nws, cycling zog sab hauv raws li nws qhov kev hloov pauv.

PTC Polymer Vs PTFE Immersion Rhaub [Direct Comparison]
Thaum koj piv PTC polymer rhaub rau PTFE immersion rhaub, qhov sib txawv mus ntau tshaj li cov khoom ntawm cov cua sov. Hauv qab no yog cov ntsiab lus ntawm qhov sib txawv tseem ceeb:

PTFE Immersion rhaub FeaturePTC Polymer Cua sov Element
Kev tswj ntsuas kub Yuav tsum tau tswj PID sab nraud, thermocouple thiab SSRSSelf tswj Tsis muaj kev tswj xyuas sab nraud
Kev tiv thaiv overheat Separate kev nyab xeeb Circuit Court lossis thermal fuse xav tauInherent; tsis tuaj yeem mus dhau qhov kev hloov pauv kub
Max. Kub txog li 110℃(nruam ntub dej) feem ntau Tsawg dua lossis sib npaug li 100℃(nyob ntawm polymer)
Tshuaj tiv thaiv zoo heev (universal) Zoo, tab sis txwv tsis pub - tawm tsam
Corrosion shielding PTFE sheath inert rau yuav luag tag nrho cov khoom muaj zog hnyav los yog oxidisers tuaj yeem tua cov polymer sheath.
Tswj qhov system nqiHigh (tswj, sensor, xaim, vaj huam sib luag qhov chaw) Zero (tsis muaj qhov xav tau ntxiv)
Hom tsis ua hauj lwm Contactor welded kaw → runaway heatingCurrent tus kheej -limited Tsis tau khiav tawm
PTC polymer rhaub yog ntse, ntsiag to, tsis hlawv. Nws tus kheej ua tau -nyob rau hauv lub ntsuas sov yuav tsis kub heev, txawm li cas los xij.

Qhov Kev Sib Tw yog Kev Tsim Kho: Kub Kub, Tsis yog-Cov ntawv siv corrosive
PTFE yog chemically ubiquitous yog li ntawd cov tsoos PTFE immersion heaters yog cov workhorses ntawm hostile tshuaj ib puag ncig -kub acids, kuab tshuaj thiab plating da dej. Txawm li cas los xij, ntau qhov kev ua haujlwm kub cua sov tsis siv corrosive chemistry. Qee qhov piv txwv suav nrog:

Kev tiv thaiv cov dej los yog cov dej me me tiv thaiv kev khov rau sab nraum cov tso tsheb hlau luam lossis cov kav dej.

Cov cua sov ntawm cov tshuaj lom neeg lom neeg xws li kab lis kev cai xov xwm, kev daws teeb meem enzyme, qhov twg qhov kub yuav tsum tsis pub tshaj 40-50C thiab txwv tsis pub thermal overshoot.

Cov cua kub ntawm cov dej yaug hauv kev ua zaub mov los yog cov khoom siv ntxhua khaub ncaws.

Kev tswj kub rau cov dej tso dej deionised siv rau kev yaug hauv cov khoom siv hluav taws xob lossis kev lag luam tshuaj.

Nyob rau hauv cov ntaub ntawv no, cov kua dej tsis yog txhoj puab heev, yog li cov tshuaj tiv thaiv ntawm PTFE tsis xav tau. Qhov tsis zoo ntawm kev tswj hwm sab nraud rau PTFE lub rhaub yog qhov nyuaj thiab tus nqi. PTC polymer rhaub tuaj yeem txuas rau lub zog hluav taws xob ncaj qha los ntawm kev hloov pauv yooj yim lossis relay. Nws heats mus txog nws qhov ntsuas kub tsim thiab nyob ntawd. Tsis muaj calibration, tsis muaj sensor drift, tsis muaj kev txhawj xeeb txog tus contactor tau ntes tau thiab ua rau muaj kev puas tsuaj loj heev.

Cov txiaj ntsig kev nyab xeeb: Ua tau -Ua tsis tiav- Kev Ua Haujlwm Zoo
Tab sis qhov zoo tshaj plaws ntawm PTC polymer heaters yog lawv qhov kev nyab xeeb. Txawm li cas los xij, tus txheej txheem PTFE immersion rhaub tuaj yeem ua tsis tau zoo txawm tias rov qab los - kev tswj hwm sab nraud, yog tias SSR tsis raug kaw (welded contacts) thiab kev nyab xeeb Circuit Court tawg. Lub rhaub yuav kub hnyiab mus ntxiv thiab rhuav tshem nws tus kheej, lub tank, lossis txhua yam uas muaj hluav taws kub.

PTC polymer rhaub tsis muaj logic, tsis muaj sensors, tsis muaj kev sib txuas. Nws yog cov khoom vaj khoom tsev uas nws yog tus kheej txwv. Txawm hais tias koj tso lub hwj chim rau txhua lub sijhawm thiab lub tank tsis muaj dab tsi, lub rhaub yuav ncav cuag nws qhov kev hloov pauv kub thiab nce kev tiv thaiv kom kos tsuas yog cov xau tam sim no (feem ntau milliamps). Feem ntau qhov kub ntawm qhov chaw muaj kev nyab xeeb rau kov - qis dua 100 degree. Qhov no ua tau - nyob rau hauv tsis tau - tus cwj pwm nyab xeeb ua rau PTC cov cua sov zoo heev rau cov tsis muaj neeg saib lossis tsis tshua muaj - kev txhim kho xws li chaw nres tsheb huab cua nyob deb, cov dej ua liaj ua teb lossis chav ua dej sov so.

Kev txwv thiab qhov twg PTFE tseem ci
Thaum PTC polymer heaters muaj qhov zoo rau qhov kub thiab txias, tsis yog - cov kev pabcuam corrosive, lawv tsis yog ib daim pam hloov rau PTFE immersion heaters. Muaj qee qhov kev txwv yuav tsum tau hais:

Qhov kub siab tshaj plaws tuaj yeem tswj tau txog li 100 degree. Rau cov ntawv thov ntawm qhov kub siab dua (xws li . 110℃boiling ntawm dilute acids) kev siv PTFE rhaub nrog kev tswj sab nraud yog tseem yuav tsum tau.

Poorer tshuaj tiv thaiv. Cov sheaths ntawm PTC polymers feem ntau yog tsim los ntawm polyolefins, sib tov ntawm fluoropolymer los yog lwm yam kev yas yas. Lawv raug puas tsuaj los ntawm cov kuab tshuaj muaj zog (acetone, chlorinated hydrocarbons), concentrated acids lossis oxidising agents. PTFE tseem yog tus txheej txheem kub thoob ntiaj teb rau tshuaj inertness.

Lub zog ceev yog qis dua. Lub watt ntom ntom rau PTC cov ntsiab lus feem ntau yog txwv tsis pub muaj qhov tseem ceeb (piv txwv li, 1-3 W / cm 2) txhawm rau tiv thaiv kev kub ntxhov hauv cheeb tsam. Yog tias muab tso rau kom zoo, PTFE immersion rhaub tuaj yeem ua haujlwm ntawm ntau dua watt ntom (3-5 W / cm2).

Form factor txwv. Feem ntau muaj raws li cov ntaub ntawv hloov tau yooj yim, cov vaj huam sib luag tiaj tus lossis cov khoom siv me me, PTC cov cua sov yog qhov ua tau, qhov loj dua -wattage immersion ntsiab (xws li, 3 kW lossis ntau dua) feem ntau muaj nyob rau hauv PTFE kev tsim kho.

Yav Tom Ntej: Coexist, Tsis Hloov
Tus kheej- txwv tsis pub PTC polymer cov cua sov ua rau muaj kev sib tw rau cov pa PTFE immersion heaters nyob rau hauv qhov dej-txhais tau tias qhov kub thiab txias (tsawg dua lossis sib npaug li 100 degree), tsis yog-corrosive, kev nyab xeeb-tseem ceeb lossis nqi-sensitive niche. Lub tshuab cua sov PTC muab qhov ua kom yooj yim ntawm kev tswj hwm, ua tau - hauv kev ua tsis tiav- kev ua haujlwm nyab xeeb thiab txo nqi tag nrho rau cov haujlwm no.

PTFE immersion heaters are the norm for harsh chemical service, high temperature service (>100 degree) los yog thaum lub siab tshaj plaws tshuaj inertness yuav tsum tau. Ob lub thev naus laus zis tsis yog kev sib tw ncaj qha thoob plaws ntau yam tab sis yog qhov sib ntxiv, txhua qhov tsim nyog rau ntau yam cua sov thiab tshuaj tswj hwm.

Xaus: physics, qhov zoo nkauj tshaj plaws kev nyab xeeb feature
Tus kheej - txwv tsis pub PTC polymer rhaub yog qhov ntse, yooj yim thiab muaj kev nyab xeeb zoo rau tus qauv PTFE immersion rhaub rau qhov tshwj xeeb ntawm qis- kub, tsis yog -corrosive, maj mam cua sov. Nws tshem tawm cov kev tswj xyuas sab nraud, qhov ua tau ntawm kev khiav tawm overheating, thiab system complexity. Qhov zoo tshaj plaws kev nyab xeeb feature yog ib qho uas muaj nyob rau hauv lub physics ntawm cov khoom nws tus kheej - lub rhaub uas tsis tuaj yeem overheat vim nws tus kheej molecular molecular molecular tiv thaiv nws. Raws li cov txheej txheem kev lag luam xav tau kev ua kom yooj yim dua, kev ua haujlwm me me thiab tsis ua haujlwm- qauv tsim muaj kev nyab xeeb, PTC polymer rhaub yuav tsum pom kev lag luam loj hlob nyob rau hauv cov ntawv thov xav tau cua sov nruab nrab, txhim khu kev qha thiab tsis yooj yim. Txwv tsis pub, lub PTFE immersion rhaub yuav txuas ntxiv ua hauj lwm nrog nws cov universal tshuaj armor thiab siab kub peev xwm. Lub neej yav tom ntej tsis yog tus yeej- coj- txhua qhov kev ua si, tab sis kev sib raug zoo nrog kev sib raug zoo uas tau tsav los ntawm daim ntawv thov.