Kev ziab kom qhuav yog tshem tawm cov dej dawb thiab ib feem ntawm cov dej sib khi adsorbed nyob rau hauv qhov sib txawv ntawm cov khoom lattice nyob rau hauv qis kub lub tshuab nqus tsev ib puag ncig. Yog li ntawd, cov txheej txheem ziab kom qhuav yog feem ntau muab faib ua tsib kauj ruam, uas yog ua ntej khov, sublimation ziab (los yog thawj theem ziab), analytical drying (los yog thib ob theem ziab), qhov kawg kev txiav txim thiab cov khoom tshem tawm.
Khoom noj khoom haus khov drying khoom chaw tsim tshuaj paus: pre-freezing ntawm cov khoom
Cov theem no tsuas yog ua lub luag haujlwm ruaj khov kom qhuav cov khoom. Qhov no yog ib kauj ruam tseem ceeb heev, vim tias yog tias nws tsis ua haujlwm zoo, nws yuav ua rau muaj ntau yam khoom molding teeb meem lossis teeb meem zoo. Yog li ntawd, nws yog ib qho tsim nyog yuav tsum nruj me ntsis tswj lub sij hawm ua ntej khov, qhov kub thiab txias, tab sis nyob rau hauv qhov tseeb ntau lawm, lub influencing yam ntawm lub tshuab nqus tsev degree feem ntau ignored nyob rau hauv lub pre-freezing txheej txheem. Qhov ntsuas kub ua ntej khov yog feem ntau nyob rau hauv 5 degree hauv qab qhov chaw khov, tseem hu ua eutectic point kub, lossis 10 ~ 15 degree hauv qab qhov kub ntawm eutectic point. Qhov kub dhia taw tes nyob rau hauv cov txheej txheem no yog qhov tsim nyog pre-freezing kub. Thaum qhov kub nce mus txog qhov txias txias txias, khaws cia rau ib lub sijhawm. Lub sij hawm ua ntej khov tsis kho, thiab nws tuaj yeem khov tag nrho hauv 2-3 teev, uas nyob ntawm cov khoom thauj khoom, phaj cheeb tsam thiab cov khoom ntawm qhov nruab nrab ntawm cov cua sov.
Khoom noj khoom haus khov drying khoom manufacturers: sublimation ziab ntawm cov khoom
Nws yog cov txheej txheem tseem ceeb ntawm kev ziab kom qhuav, feem ntau yog ua kom cov dej khov rau hauv cov khoom siv, tab sis kom ntseeg tau tias cov dej khov tsis yaj, cov saturated vapor siab ntawm qhov chaw khov ntawm cov khoom yog siab dua qhov chaw nyob ib puag ncig cov dej khov. Yog li ntawd, nws yog ib qho tsim nyog yuav tsum tau tshem tawm cov dej vapor sai sai thiab txuas ntxiv ntxiv cov cua sov uas xav tau rau sublimation. Qhov kub thiab qhov siab dhau los ua qhov tseem ceeb ntawm cov txheej txheem no. Thawj yog qhov kub thiab txias thaum lub sij hawm sublimation ziab, uas yuav tsum tau teem rau hauv qab ntawm eutectic point. Lub sublimation ceev yog ceev tshaj nyob ze ntawm lub eutectic point. Thaum lub sij hawm sublimation txheej txheem, lub interface ntawm cov qhuav txheej thiab khov txheej nyob rau hauv cov khoom yuav maj mam txo lub sij hawm. Thaum qhov sib cuam tshuam ntawm txheej qhuav thiab txheej khov ploj (cov txheej khov khov ploj), qhov kub thiab txias ntawm cov khoom nyob rau lub sijhawm no yog qhov nrawm dua ua ntej cov txheej khov ploj. Raws li cov txheej txheem tsim khoom ntawm cov khoom, nws yuav tsum tau txuas ntxiv rau ob peb teev kom ntseeg tau tias tag nrho cov khaubncaws sab nraud povtseg hauv cov khoom ploj.
Khoom noj khoom haus khov drying khoom manufacturers: analytical ziab ntawm cov khoom
Tom qab sublimation qhuav, tag nrho cov dej khov muaju hauv cov khoom yuav tawm ntau qhov, tab sis tseem yuav muaj li ntawm 10% ntawm cov dej tsis khov. Los ntawm kev ua kom qhuav, peb txhais tau tias txo cov dej no thiab khaws cia li ntawm 2%, uas ua haujlwm hauv cov ntaub ntawv kom qhuav. Qhov kub siab dua ntawm theem no yuav tsum tau txiav txim siab raws li cov khoom lag luam thiab cov ntsiab lus noo noo ntawm cov khoom tiav, tab sis qhov kub thiab txias tuaj yeem tsim nyog kom txo tau cov dej noo. Hauv qhov rov ua kom qhuav, lub aeration siab yuav tsum tau nce kom tsim nyog los ua kom sov. Txhawm rau ua kom lub ziab kom nrawm nrawm thiab ua kom lub sijhawm luv, lub tshuab nqus tsev siab tuaj yeem rov qab tau thaum cov khoom kub tau nce mus txog qhov kub thiab txias los ntawm qhov nruab nrab ntawm lub tshav kub hloov.
Khoom noj khoom haus khov-drying khoom chaw tsim tshuaj paus: freeze-drying kawg point kev txiav txim
Hauv kev ua haujlwm tiag tiag, lub sijhawm kawg ntawm kev ntsuas ziab tuaj yeem txiav txim siab raws li cov xwm txheej hauv qab no:
(1) Qhov ntsuas kub ntawm cov khoom yog qhov ua tau raws li qhov ntsuas kub ntawm cov khoom cua sov thiab khaws cia rau lub sijhawm.
(2) Lub siab nyob rau hauv lub qhov cub kom qhuav thiab lub siab nyob rau hauv lub txias ntxiab yuav zoo ib yam thiab raug tswj rau ib lub sij hawm.
(3) Qhov cub siab. Qhov ntsuas kub qhov txias txias pib rov qab mus rau qhov ntsuas thaum cov khoom siv thauj khoom thiab khaws cia rau lub sijhawm.
(4) Thaum lub valve nruab nrab ntawm lub qhov cub kom qhuav thiab lub condenser raug kaw, lub tshuab nqus tsev ntawm lub qhov cub kom qhuav nce los ntawm tsawg dua 5Pa ({2}}.05 bar) li ntawm ob feeb los txiav txim tias qhov khov-qhuav dhau lawm. .
Khoom noj khoom haus khov-drying khoom chaw tsim tshuaj paus: freeze-drying nkhaus tsim tsis
Lub khov-drying nkhaus tuaj yeem muab faib ua qhov dav thiab nqaim. Qhov nqaim khov-drying nkhaus yog hais txog qhov nkhaus ntawm kev sib raug zoo ntawm lub qhov cub khov-qhuav qhov kub thiab lub sijhawm. Hauv kev txiav txim siab dav dav, qhov nkhaus khov-qhuav yog hais txog kev sib raug zoo ntawm cov khoom kub, phaj (txuas) kub, condenser (txias ntxiab) kub, nqus tsev kawm ntawv thiab lub sij hawm thaum lub sij hawm khov-drying txheej txheem, raws li qhia hauv daim duab hauv qab no. Feem ntau, qhov kub thiab qhov siab yog cov ordinates, thiab lub sij hawm yog abscissa. Tsuas yog los ntawm kev tswj hwm qhov tsis sib xws ntawm txhua theem ntawm cov txheej txheem khov-ua kom qhuav tuaj yeem tau txais cov khoom zoo. Lub freeze-drying nkhaus tsis yog tsuas yog lub hauv paus rau kev tuav haujlwm ntawm lub tshuab ziab khaub ncaws, tab sis kuj yog lub hauv paus rau kev tswj tsis siv neeg lub tshuab ziab khaub ncaws.
