Lub Freeze Dryer yog dab tsi?

Lub tshuab ziab khaub ncaws khov tshem tawm cov dej los ntawm cov khoom siv uas tsis tuaj yeem khaws cia, txuas nws lub neej txee thiab / lossis ua kom yooj yim rau kev thauj mus los.Lub tshuab ziab khaub ncaws ua haujlwm los ntawm kev khov cov khoom, tom qab ntawd txo qhov siab thiab ntxiv cua sov kom cov dej khov hauv cov khoom hloov pauv ncaj qha mus rau qhov vapor (sublimate).

Lub tshuab ziab khaub ncaws khov ua haujlwm hauv peb theem:
1. khov
2. Kev ziab qhuav (Sublimation)
3. Secondary Drying (Adsorption)

Kev ziab kom qhuav tuaj yeem txo lub sij hawm ziab los ntawm 30%.

Theem 1: Theem khov

Qhov no yog theem tseem ceeb tshaj plaws.Freeze dryers siv ntau txoj hauv kev los khov ib yam khoom.

· Kev khov tuaj yeem ua rau hauv lub freezer, da dej txias (plhaub lub freezer), lossis ntawm lub txee rau hauv lub tshuab ziab khaub ncaws.

· Lub tshuab ziab khaub ncaws txias txias cov khoom hauv qab nws qhov taw tes triple kom paub meej tias sublimation, tsis yog melting, yuav tshwm sim.Qhov no khaws cov khoom siv lub cev.

· Lub tshuab ziab khaub ncaws uas yooj yim tshaj plaws khov dries cov dej khov loj loj, uas tuaj yeem tsim los ntawm qeeb khov lossis annealing.Txawm li cas los xij, nrog cov ntaub ntawv lom neeg, thaum muaj cov pob zeb loj dhau lawm lawv tuaj yeem ua rau cov phab ntsa ntawm tes, thiab qhov ntawd ua rau cov txiaj ntsig tsis zoo tshaj plaws.Txhawm rau tiv thaiv qhov no, qhov khov yog ua kom sai.

· Rau cov ntaub ntawv uas nyiam los nag, annealing tuaj yeem siv tau.Cov txheej txheem no suav nrog ceev ceev khov, tom qab ntawd tsa cov khoom kub kom cia cov muaju loj tuaj.

Theem 2: Kev ziab qhuav (Sublimation)
· Lub sijhawm thib ob yog thawj qhov ziab (sublimation), uas lub siab txo qis thiab cua sov ntxiv rau cov khoom kom cov dej sublimate.

· Lub tshuab ziab khaub ncaws lub tshuab nqus tsev nrawm sublimation.Lub freeze dryer lub txias condenser muab ib qho chaw rau cov dej vapor rau adhere thiab solidify.Lub condenser kuj tiv thaiv lub tshuab nqus tsev twj los ntawm cov dej vapor.

· Kwv yees li 95% ntawm cov dej hauv cov khoom raug tshem tawm nyob rau theem no.

· Kev ziab thawj zaug tuaj yeem ua haujlwm qeeb.Cov cua kub ntau dhau tuaj yeem hloov cov qauv ntawm cov khoom.

Theem 3: Secondary Drying (Adsorption)
· Cov theem kawg no yog kev ziab kom qhuav (adsorption), thaum lub sij hawm uas cov dej ionically-bound molecules raug tshem tawm.
· Los ntawm kev nce qhov kub siab tshaj nyob rau hauv thawj lub sij hawm ziab, cov bonds tawg ntawm cov khoom thiab cov dej molecules.

· Khaws cov khoom qhuav qhuav khaws cov qauv ntxeem tau.

· Tom qab lub tshuab ziab khaub ncaws ua tiav nws cov txheej txheem, lub tshuab nqus tsev tuaj yeem tawg nrog cov roj inert ua ntej cov khoom ntim.

· Cov ntaub ntawv feem ntau tuaj yeem qhuav mus rau 1-5% seem noo noo.

Freeze Dryer Teeb meem kom zam:
· Cua sov cov khoom kub dhau heev lawm yuav ua rau yaj-rov qab los yog cov khoom tawg

· Condenser overload tshwm sim los ntawm vapor ntau dhau los tsoo lub condenser.
o Ntau dhau vapor creation

o Ntau qhov chaw saum npoo av

o Qhov chaw me me dhau ntawm condenser

o Lub tub yees tsis txaus

· Vapor choking - cov vapor yog tsim los ntawm tus nqi nrawm dua li nws tuaj yeem tau los ntawm qhov chaw nres nkoj vapor, qhov chaw nres nkoj ntawm cov khoom lag luam thiab cov condenser, tsim kom muaj kev nce siab hauv chamber.

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