Cov kab ua tshuaj lom neeg thiab cov chaw tsim khoom batch feem ntau pom qhov tsis ruaj khov ntawm qhov hluav taws xob kub lossis cua sov ua haujlwm tsis zoo thaum cov nqi ntws hloov lossis qhov kub ntawm qhov sib txawv thaum lub sijhawm ua haujlwm. Kev xav tau sai sai ntawm kev tsim khoom, kev hloov pauv, lossis txawm tias lub twj tso kua mis hloov pauv tuaj yeem ua rau lub qhov hluav taws xob hloov pauv hluav taws xob mus, ua rau tawm - cov khoom lag luam tshwj xeeb lossis xav tau kev kho cov lus qhia tas li. Nyob rau hauv cov kev hloov pauv no, PTFE cov khoom siv hluav taws xob hloov pauv coj txawv ntawm lwm cov qauv tsim vim tias cov khoom siv thermal conductivity tsawg thiab txoj hauv kev zoo, uas cuam tshuam sai thiab ruaj khov lub zog teb.
PTFE heat exchangers siv lub nyias fluoropolymer raj los yog liner, feem ntau 0.5 mus rau 2 hli tuab, cais cov txheej txheem corrosive kua los ntawm kev pab cuam. Cov txheej no muaj cov thermal conductivity tsawg heev- nyob ib ncig ntawm 0.25 W/m·K- piv nrog cov hlau uas ua cua sov 50 txog 100 npaug sai dua. Thaum tus nqi ntws los yog kub hloov tam sim ntawd, PTFE phab ntsa qhia pom cov thermal inertia. Thaum tshav kub kub tsis dhau tam sim ntawd; Hloov chaw, cov txheej txheem polymer absorbs thiab tso tawm lub zog qeeb dua, ua haujlwm zoo li tsis muaj. Qhov hluav taws xob kub hloov maj mam es tsis txhob spiking lossis poob qis. Cov nyhuv damping no tuaj yeem pab txhim kho cov txheej txheem thaum muaj kev hloov pauv me me, tab sis nws kuj txhais tau hais tias tus exchanger yuav siv sij hawm ntev dua kom ncav cuag lub xeev khov kho tshiab tom qab hloov pauv tseem ceeb.
Flow ceev plays lub luag hauj lwm ncaj qha nyob rau hauv tag nrho cov efficiency. Cov velocities siab dua txhim kho cov cua sov hloov ntawm ob sab ntawm phab ntsa los ntawm thinning cov ciam teb txheej, uas ib nrab offsets cov nyhuv insulating ntawm PTFE. Hauv kev siv tiag tiag, ntau PTFE tsim lub hom phiaj kev hloov pauv hloov pauv (Reynolds tus lej kwv yees li 2,300 txog 4,000) kom sib npaug sib xyaw ua ke tiv thaiv kev poob siab. Thaum tus nqi ntws poob dheev, lub kaw lus yuav hloov mus rau laminar ntws, thickening ciam khaubncaws sab nraud povtseg thiab txo tag nrho cov cua sov-hloov coefficient. Hloov pauv, kev nce nrawm nrawm tuaj yeem rov ua haujlwm sai dua li qhov ntsuas kub ntawm qhov profile tuaj yeem hloov kho tag nrho, tsim kom muaj qhov tsis sib xws ntawm qhov xav tau thiab kev ua haujlwm tiag tiag.
Qhov kub hloov pauv ntxiv lwm txheej ntawm tus cwj pwm. PTFE tseem nyob ruaj khov mus txog 260℃yam tsis muaj corroding lossis hloov qhov loj me, yog li cov cua sov-hloov nto nyob twj ywm huv si thiab zoo ib yam txawm tias thaum caij tsheb kauj vab. Cov khoom uas tsis yog- nplaum tiv thaiv cov nplai lossis fouling txheej los ntawm kev txhim kho sai, uas pab tswj kev ua haujlwm tau ntev dua hauv cov hlau sib pauv uas cov deposits insulate saum npoo thiab nthuav cov lus teb qeeb. Txawm li cas los xij, qhov qis conductivity tseem txhais tau hais tias tus exchanger teb qeeb dua rau inlet kub viav vias dua siab -conductivity designs.
Kev sib piv nrog rau lwm cov kev daws teeb meem cua sov ua rau cov duab zoo li no yooj yim dua. Cov tshuab hluav taws xob siv hluav taws xob ua haujlwm yuav luag tam sim ntawd vim tias lawv tsim hluav taws xob ncaj qha rau hauv cov kua dej lossis cov khoom siv uas yuav luag tsis muaj cua sov hauv nruab nrab. Kev hloov pauv ntawm lub zog tawm tswv yim tshwm sim ntawm lub qhov hluav taws xob hauv vib nas this, ua rau lawv teb tau zoo tab sis txwv rau kev huv, tsis yog -cov haujlwm corrosive. Cov tshuab hluav taws xob hauv pem teb cua sov siv cov kua dej ntau thiab cov khoom nyob ib puag ncig, yog li lawv teb qeeb heev -feem ntau siv sij hawm- kom ncav cuag qhov kub thiab txias. Lawv muab qhov tseem ceeb ntawm cov khoom tso tawm tsis tu ncua, ua kom zoo tshaj qhov hloov kho sai. Phab ntsa- dai boilers cia siab rau cov hlau tsim thiab optimized flow paths kom ceev ceev sov- nyob rau hauv cov dej circuits, xa cov lus teb ceev ceev nyob rau hauv qhov chaw cua sov tab sis tsis muaj cov tshuaj cais tawm uas yuav tsum tau rau cov txheej txheem nruj heev. PTFE heat exchangers zaum ntawm cov kev kub ntxhov no: qeeb qeeb thiab ruaj khov dua li cov hluav taws xob hluav taws xob ncaj qha lossis cov hlau sib txuas, tseem muaj tshuaj tiv thaiv ntau dua li hauv pem teb lossis cov qauv boilers hauv kev pabcuam corrosive.
Ntau yam tsim qauv cuam tshuam zoo npaum li cas tus PTFE exchanger tuav cov xwm txheej sib txawv. Tube txoj kab uas hla, tus naj npawb ntawm kev hla, thiab tag nrho thaj chaw saum npoo txiav txim siab tshaj tawm thiab lub sijhawm nyob. Cov kab me me los yog ntau dua dhau los nce qhov nrawm hauv zos thiab txhim kho cov coefficients convective tab sis nce siab poob thaum hloov pauv. Cov khoom ua kua xws li viscosity thiab cov cua kub tshwj xeeb kuj tseem ceeb - cov kua nplaum ua kom qeeb cov lus teb ntxiv. Hauv kev xyaum, qhov tsim nyog qhov kev ua kom zoo nrog kev ua qauv ua ntu zus pab kwv yees lub sij hawm lag luam thiab tiv thaiv kev overshoot.
Cov lus qhia muaj txiaj ntsig zoo rau kev tswj xyuas cov cua sov kom ruaj khov nyob rau hauv cov xwm txheej tsis sib xws xws li kev txhim kho cov tso tsheb hlau luam me me lossis sib xyaw cov ntsiab lus qis qis thaum tswj nruj yog qhov tseem ceeb thaum lub sij hawm nquag hloov. Hloov pauv tau- cov twj nrawm ua ke nrog qhov tseeb ntws thiab ntsuas qhov ntsuas kub tso cai rau kev hloov pauv hloov pauv sai sai. Tswj loops tuned tshwj xeeb rau tus exchanger lub thermal inertia-feem ntau nrog pub-forward ntsiab raws li inlet tej yam kev mob- ua tau zoo tshaj cov lus qhia yooj yim ib leeg. Kev soj ntsuam kev poob siab thiab qhov kub thiab txias sib txawv ua rau muaj kev ceeb toom ntxov ntawm txhua tus cwj pwm tsis zoo uas tshwm sim los ntawm fouling lossis flow maldistribution.
Feem ntau ua yuam kev thaum xaiv cov khoom siv lossis kev tsim qauv suav nrog kev xav tias PTFE exchangers yuav teb zoo li nyias-cov hlau thaiv phab ntsa, uas ua rau muaj qhov loj ntawm cov khoom siv los yog qhov tsis zoo ntawm PID. Lwm qhov kev ua yuam kev tsis tu ncua yog xaiv cov qauv catalog raws li qhov ruaj khov- lub luag haujlwm ntawm lub xeev yam tsis tau kuaj xyuas cov ntaub ntawv ua haujlwm tsis tu ncua rau cov kua dej tiag tiag thiab qhov xav tau hloov pauv. Kev tsis saib xyuas cov txiaj ntsig ntawm qhov kub thiab txias- nyob ntawm qhov viscosity tuaj yeem hloov pauv kev tswj hwm kev npaj txhij txog thaum lub sijhawm hloov pauv, txo kev ua haujlwm ntau dua li qhov xav tau.
Hauv cov ntsiab lus, kev hloov hluav taws xob ua kom sov hauv PTFE lub tshuab hluav taws xob hloov pauv hloov maj mam thaum tus nqi ntws thiab qhov kub hloov pauv vim tias cov khoom siv thermal conductivity tsawg thiab ua rau thermal inertia, muab smoother damping thiab ntev dua -lub sij hawm stability nyob rau hauv corrosive kev pab cuam txawm tias thawj zaug teb lags qab siab -conductivity designs. Thaum lub tshuab hluav taws xob ua kom sov tam sim ntawd thiab cov cua sov hauv pem teb lossis phab ntsa- dai boilers ua hauj lwm qis dua - cov luag hauj lwm, PTFE units muab kev ntseeg siab tsis ncaj mus rau qhov twg cov tshuaj sib haum xeeb tseem ceeb tshaj plaws. Ntau qhov chaw muaj kev lag luam- tsis tu ncua siab- kab purity, batch kev cuam tshuam nrog kev hloov pauv ntau zaus, lossis cov kwj tsis sib xws -yuav tsum tau muaj cua sov zoo- hloov cov kev daws teeb meem sib haum rau cov kev ua haujlwm tiag tiag, cov khoom ua kua dej, thiab kev tswj hwm xav tau kom ua tau raws li qhov kev ua tau zoo, kev ua tau zoo tshaj qhov ntau ntawm cov xwm txheej ntau lawm.
