Yuav ua li cas zoo li qub Mixers nyob rau hauv PTFE Tubes ntawm Low Laminar Flow Regimes?

Turbulent flow yog qhov dawb huv grail rau kev hloov hluav taws xob, tab sis ntau yam tsawg -flow PTFE exchanger designs tseem laminar. Ntawm no cov kua dej dhau los ntawm cov ntawv tsis tu ncua, thiab cov cua sov tsuas yog pauv los ntawm kev ua haujlwm qeeb. Kev sib xyaw ntawm cov khoom zoo li qub cuam tshuam cov laminar ntws hauv lub raj thiab kev ua haujlwm tau zoo heev hauv cov khoom zoo li qub laminar ntws PTFE raj cov ntsiab lus zoo.

Laminar Flow hauv PTFE Tubing: Qhov Teeb Meem
Cov kua dej hauv cov raj PTFE feem ntau ua haujlwm hauv kev sib sib zog nqus laminar ntawm tus nqi qis. Nyob rau hauv cov ntaub ntawv no cov dej ntws yog heev organised, kua txheej khiav mus rau tib lub sij hawm thiab muaj me ntsis sib tov ntawm rhuab tub ntxhais thiab cov phab ntsa txias.

Qhov no ua rau muaj kev txwv hnyav heev. Thaum tshav kub kub kis tau tus mob tsuas yog txwv los ntawm radial conduction ntawm stagnant txheej. Tag nrho cov kev ua tau zoo ntawm lub exchanger yog tsawg txawm tias txaus cheeb tsam yog muab. Txawm li cas los xij, kev nce ntws tsis yog ib txwm ua tau vim muaj kev txwv cov twj tso kua mis, kev txwv kev tswj tshuaj lom neeg lossis kev xav txog kev ruaj ntseg.

Nyob rau hauv cov xwm txheej no, passive internal augmentation yog ib qho tseem ceeb.

Influence ntawm Static Mixers ntawm Laminar Flow Behavior
Tube: Nruam Flow Reorganization
Ib qho khoom siv zoo li qub muaj xws li cov helical ruaj khov lossis cov hniav-zoo li cov khoom siv ntxig rau hauv lub raj. Cov ntsiab lus no tsis tig, tab sis siv lawv cov duab geometry kom sib cais, tig, thiab rov ua kom cov dej ntws tawm.

Raws li cov dej nkag mus los ntawm cov khoom sib tov, cov qauv sab hauv ua rau cov kev khiav dej num rov ua dua. Cov kua dej kub nyob hauv nruab nrab ntawm lub raj xa mus rau ntawm phab ntsa thaum cov kua dej txias hauv thaj tsam phab ntsa yog rub rov qab rau hauv cov tub ntxhais. Qhov kev sib pauv radial tas li no ua rau cov txheej txheem txheej txheej uas yog yam ntxwv ntawm laminar ntws.

Lub tov khoom yog ib tug passive stirrer uas redistributes tshav kub zog tas li yam tsis muaj lwm lub hwj chim input.

Txawm li cas los xij, cov khoom sib xyaw zoo li qub tseem ua haujlwm ntawm cov lej Reynolds tsawg heev uas tsis tuaj yeem ua rau muaj kev kub ntxhov, thiab cov neeg txhawb nqa kev kub ntxhov tsis zoo. Hloov chaw lawv mechanically quab yuam sib tov ntawm microscale .

Kev txhim kho cua sov hauv Laminar Flow Regimes
Los ntawm Stratified Flow mus Nruam Mixing
Qhov teeb meem txwv nyob rau hauv cov xwm txheej laminar tsis yog qhov chaw tab sis tsis muaj kev sib xyaw ntawm cov kua dej. Static mixers kov yeej qhov kev txwv no los ntawm kev txhim kho kev thauj mus los radial.

Nws tau pom tias nyob rau hauv ntau daim ntawv thov ntawm PTFE hlab, static mixing li boost cua sov hloov los ntawm 3 mus rau 10 npaug tshaj ib lub raj khoob. Qhov kev txhawb nqa tseem ceeb no yog vim lub sijhawm tawg thiab hloov kho ntawm cov txheej txheem thermal ciam teb raws lub raj ntev.

Qhov kev coj cwj pwm no yuav muaj txiaj ntsig zoo rau cov khoom siv hluav taws xob zoo li qub laminar ntws PTFE raj kev ua haujlwm hauv kev ua tshuaj lom neeg uas tsis tshua muaj nqi yuav xav tau rau kev tswj cov tshuaj tiv thaiv lossis kev txwv sijhawm nyob.

Thaum tshav kub kub hloov vs. siab poob
Hydraulic nplua rau kev sib xyaw kom zoo
Thaum tshav kub kub kev ua haujlwm tau zoo dua qub, tab sis ntawm tus nqi ntawm kev nce siab poob. Cov dej ntws yuav tsum dhau los ntawm ntau qhov geometry hauv cov khoom sib tov, uas ntxiv cov dej ntws tawm. Tus nqi ntawm qhov tsis kam yog nyob ntawm tus nqi ntws thiab qhov nyuaj ntawm qhov sib tov.

Hauv qis- cov tshuab ntws no qhov kev poob siab feem ntau yog siv tau vim tias lub zog siv hluav taws xob tsis yog thawj qhov kev txwv. Tab sis nyob rau hauv cov xwm txheej siab dua qhov kev nplua hydraulic tuaj yeem txwv.

Feem ntau PTFE sib xyaw ua ke zoo li qub yog ua los ntawm PTFE lossis PFA kom tiv taus cov chaw tsis sib haum nrog cov tshuaj tiv thaiv tag nrho. Cov ntaub ntawv no khaws lawv cov kev tiv thaiv corrosion thiab mechanical stability nyob rau hauv tas li ndlwg tej yam kev mob.

Static mixers muab cov txheej txheem siv tau los txhim kho cov cua sov hauv cov txheej txheem thaum ntws tsis tuaj yeem nce ntxiv, yam tsis hloov cov xwm txheej sab nraud ntawm lub cev.

Daim ntawv thov hauv Heat Exchanger Tubes ntawm PTFE
Cov khoom sib xyaw zoo li feem ntau yog kev cai- ua cov khoom siv ntxig siv hauv PTFE raj tshuab. Cov inserts tuaj yeem muab tso rau hauv cov txheej txheem tsim khoom lossis rov ua dua tshiab rau hauv cov raj xa dej uas twb muaj lawm, nyob ntawm qhov nkag tau ntawm qhov system.

Cov ntsiab lus tseem ceeb rau kev siv suav nrog:

Ua kom tiav chemical compatibility ntawm cov khoom sib tov nrog cov txheej txheem kua

Matching tov khoom geometry rau raj txoj kab uas hla los xyuas kom meej pom kev koom tes ntawm ntws

Kev soj ntsuam ntawm cov nyhuv poob siab piv rau cov twj tso kua mis muaj peev xwm

Fouling kev pheej hmoo txo ​​qis hauv cov khoom me me - cov kua dej ua kua

Hauv cov xwm txheej laminar ntws, cov tshuab yuav tuaj yeem khaws cov haujlwm ruaj khov nrog kev tsim kom zoo, thaum ua kom zoo dua thermal teb.

Xaus: Los ntawm Laminar Flow mus rau Siab -Txoj Cai Ua Haujlwm
Static mixers yog ib qho ntawm cov kev ua tau zoo tshaj plaws rau kev txhim kho cov cua sov hloov hauv laminar ntws PTFE hlab. Lawv rov faib thiab sib koom ua ke cov kwj ntawm cov kua dej, cuam tshuam cov thermal stratification thiab yog li txhim kho lub zog pauv kev ua haujlwm.

Nyob rau hauv ntau qhov xwm txheej zoo li qub mixers tig lub laminar - ntws thermal bottleneck mus rau hauv lub qhov dej - sib xyaw, siab - kev ua tau zoo yam tsis muaj kev hloov kho rau cov dej ntws sab nraud. Cov cuab yeej txhim kho passive no qhia tau hais tias yuav ua li cas lub geometry sab hauv tuaj yeem hloov kho qhov kev txwv ntawm kev ua tau zoo ntawm tus exchanger.

Thaum kawg, cov kev daws teeb meem zoo li no qhia tau tias cov qauv tsim sab hauv ntse, tsis muaj lub zog tawm tswv yim ntau, tuaj yeem txhawb nqa thermal ua tau zoo txawm tias nyob rau hauv qhov qis qis - ntws.