Cov tshuaj tsuag kom qhuav yog tus cwj pwm los ntawm kev hloov pauv sai, dej nrawm nrawm, thiab lub sijhawm ziab sai. Tsis tas li ntawd, cov khoom lag luam muaj cov khoom zoo, nkig zoo nkauj, thiab zoo solubility, uas tuaj yeem txhim kho tus nqi ntawm kev sib xyaw ntawm qee qhov kev npaj thiab tsim nyog rau cov tshuaj thermosensitive. Tsis tas li ntawd, cov tshuaj tsuag kom qhuav tuaj yeem siv los npaj microcapsules. Txoj kev dav siv rau dye drying.
Ib txoj kev ziab kom tshem tawm noo noo los ntawm atomizing dyes. Haum rau ziab ntau yam dyes. Nws tuaj yeem qhuav cov hmoov zoo dye, hmoov ultrafine, hmoov tsis muaj hmoov av, thiab hollow granules.
Raws li txoj kev dye atomization, nws tuaj yeem muab faib ua peb pawg:
(1) Airflow atomization, siv cov cua compressed los yog dej vapor rau atomize cov khoom ua kua;
(2) Siab atomization, siv lub twj tso kua mis siab los nias cov khoom ua kua tawm ntawm lub nozzle ntawm kev kub ceev, ua ib qho pos huab;
(3) Rotary atomization suav nrog ntxiv cov khoom ua kua rau lub siab ceev rotating disc (7000 ~ 20000 r / min) nyob rau hauv lub atomizer kom sai tshem tawm cov khoom ua kua thiab atomize nws. Txoj kev thib peb muaj cov txiaj ntsig zoo, lub sijhawm luv luv, kev ua haujlwm siab, thiab tau txais txiaj ntsig los ntawm kev lag luam dyeing. Nws qhov tsis zoo yog cov cuab yeej siv nyiaj siab thiab kev siv hluav taws xob siab.
Lub hauv paus ntsiab lus ntawm kev ziab kom qhuav yog disperse cov ntaub ntawv kom qhuav rau hauv cov khoom zoo xws li pos huab los ntawm kev ua haujlwm, (ua kom cov evaporation cheeb tsam ntawm cov dej, ua kom cov txheej txheem kom qhuav) sib cuag nrog cua kub, tshem tawm feem ntau ntawm cov dej nyob rau hauv ib qho instant, thiab qhuav cov khoom nyob rau hauv cov ntaub ntawv mus rau hauv hmoov.
Qhov zoo thiab qhov tsis zoo ntawm cov tshuaj tsuag kom qhuav Qhov zoo ntawm cov tshuaj tsuag kom qhuav:
1. Cov txheej txheem ziab yog ceev heev;
2. Nws tuaj yeem qhuav ncaj qha rau hauv cov hmoov;
3. Ib qho yooj yim los hloov cov kev ua kom qhuav thiab kho cov qauv zoo;
4. Vim yog evaporation tam sim ntawd, kev xaiv cov khoom siv rau cov khoom siv tsis nruj;
5. Lub tshuab ziab khaub ncaws muaj qee qhov tsis zoo, ua kom muaj kev nyiam huv thaum lub sij hawm tsim khoom, tsis txhob muaj plua plav ya hauv lub rooj cob qhia, thiab txhim kho cov khoom purity;
6. Kev ua haujlwm siab ntau lawm nrog ob peb tus neeg ua haujlwm.
Disadvantages ntawm spray drying:
1. Cov cuab yeej siv tau yooj yim, npog thaj tsam loj, thiab yuav tsum muaj peev txheej loj ib zaug;
2. Tus nqi ntawm atomizers thiab hmoov rov qab cov cuab yeej yog qhov siab;
3. Yuav tsum muaj huab cua ntau, ua kom lub zog siv hluav taws xob ntawm lub tshuab nqus tsev thiab lub peev xwm ntawm cov cuab yeej rov qab;
4. Tsawg thermal efficiency thiab siab kub noj.
Kev xav tau ntawm cov tshuaj tsuag kom qhuav ntawm cov khoom siv:
1. Cov khoom nyob rau hauv kev sib cuag nrog cov khoom yuav tsum yooj yim los ntxuav thiab sterilize;
2. Kev ntsuas yuav tsum tau coj los tiv thaiv cov hmoov coke los ntawm kev tsim cov eddy tam sim no thiab countercurrent hauv huab cua kub;
3. Tiv thaiv huab cua los ntawm kev nqa impurities rau hauv cov khoom;
4. Nruab nrog kub thiab siab qhia thiab kaw cov cuab yeej rau kev tshuaj xyuas yooj yim ntawm kev ua haujlwm ntau lawm;
5. Ib qho khoom siv plua plav rov qab nrog tus nqi rov qab siab;
6. Cov hmoov yuav tsum tau tawm sai sai thiab txias kom zoo dua solubility thiab solubility sai;
7. Qhov kub thiab txias hauv chav ziab thiab qhov tso pa tawm yuav tsum tsis pub tshaj 100 ℃ kom muaj kev nyab xeeb thiab zoo;
8. Thaum cov tshuaj tsuag, cov kua mis ntau ntxiv yog nyob rau hauv kev sib cuag nrog cov cua kub kom txhim kho cov thermal efficiency;
9. Txo cov phab ntsa nplaum rau cov khoom viscous kom ntau li ntau tau.
Kev faib tawm ntawm cov khoom siv tshuaj tsuag kom qhuav yog cais raws li txoj kev ntawm granulation:
1) Txoj kev siv tshuaj tsuag kom qhuav:
① Lub hauv paus ntsiab lus: Siv lub twj tso kua mis siab, cov khoom yog condensed rau hauv 10-200 pos huab zoo li hais los ntawm atomizer (spray phom) ntawm lub siab ntawm 70-200 atmospheric siab, uas ncaj qha hu rau huab cua kub rau kev sib pauv cua sov thiab ua tiav ziab hauv lub sijhawm luv luv.
② Lub tshuab nqus dej twj tso kua mis: M-hom thiab S-hom, nrog cov lus qhia zawj uas tuaj yeem ua rau cov kua dej tig. Lub axis ntawm M-hom qhia zawj yog nyob rau ntawm lub axis ntawm lub nozzle thiab tsis cuam tshuam nrog nws; Lub axis ntawm S-shaped qhia ditch yog ntawm ib lub kaum sab xis rau kab rov tav. Lub hom phiaj yog sim ua kom muaj kev kub ntxhov ntawm cov tshuaj thaum lub sij hawm txau.
2) Centrifugal spray kom qhuav txoj kev:
① Lub hauv paus ntsiab lus: Lub tshuab hluav taws xob ceev ceev nyob rau hauv txoj kab rov tav yog siv los siv lub zog centrifugal rau cov kev daws teeb meem, ua rau nws yuav tsum tau muab pov tseg ntawm kev kub ceev, tsim ib zaj duab xis nyias, zoo hlau, los yog kua tee dej. Vim muaj kev sib txhuam, kev cuam tshuam, thiab kua muag ntawm huab cua, tangential acceleration generated los ntawm kev sib hloov ntawm lub disk thiab radial acceleration generated los ntawm centrifugal quab yuam ua rau ib qho kev sib txuas ceev txav ntawm lub disk, nrog ib tug trajectory ntawm ib tug kauv duab. Tom qab cov kua raug muab pov tseg los ntawm cov disk saum toj no cov kab kauv, tawg mus rau hauv cov tee me me, lawv txav mus raws qhov kev taw qhia tangential ntawm lub disk ntawm qhov nruab nrab ceev, thiab tib lub sijhawm, cov tee dej poob rau hauv lub zog gravitational ntawm lub ntiaj teb qhov chaw, vim muaj qhov sib txawv ntawm cov khoom txau. Yog li ntawd, lawv cov ya deb kuj txawv, thiab cov khoom ntog ntawm qhov sib txawv ntawm qhov sib txawv tsim ib lub tog raj kheej symmetrical txog lub axis ntawm kev sib hloov.
② Yuav kom tau txais cov tee dej ntau dua:
ib. Txo kev vibration thaum lub sij hawm hloov disk
b. Tus nqi ntawm cov kua nkag mus rau hauv lub disk tseem nyob tas li ntawm ib lub sijhawm
c. Qhov saum npoo ntawm lub disc yog tiaj thiab du. d. Lub voj voog nrawm ntawm lub disc yuav tsum tsis txhob me dhau, rmin = 60m / s. Yog tias cov emulsion (100-160m / s) tsawg dua 60m / s, cov tshuaj tsuag tsuag tsis sib xws. Qhov kev ncua deb ntawm cov tshuaj tsuag zoo li feem ntau yog tsim los ntawm ib pawg ntawm cov tee dej thiab ib pab pawg ntawm cov tee dej uas nyob ze ntawm lub disc, thiab txo qis nrog qhov nce ntawm kev sib hloov ceev.
③ Cov qauv ntawm cov tshuaj tsuag centrifugal: qhov yuav tsum tau muaj: qhov ntub dej ib puag ncig ntev, cov tshuaj tuaj yeem ncav cuag kev sib hloov ceev, cov tshuaj tsuag yog ib yam, cov qauv ruaj khov, lub teeb, yooj yim, tsis muaj kaum tuag, yooj yim rau disassemble thiab ntxuav, thiab cov khoom tsim tau siab. Muab faib raws li daim ntawv ntawm lub tshuab ziab khaub ncaws raws li cov kev taw qhia ntawm kev txav ntawm cov cua kub thiab cov khoom qhuav hauv chav ziab khaub ncaws: hom sib xyaw ua ke, hom dej ntws, hom sib xyaw. Concurrent flow qauv feem ntau yog siv rau hauv cov mis nyuj. Cov qauv sib xyaw ua ke tuaj yeem qhuav tau siv qhov kub ntawm qhov cua nkag siab dua yam tsis muaj kev cuam tshuam rau qhov zoo ntawm cov khoom.
ib. Kab rov tav parallel flow qauv
b. Vertical qhovntsej thiaj tsis mob thiab ntws qauv
c. Vertical descent mix flow type.
d. Txau kom qhuav ntawm vertically ascending thiab ntws cov zaub mov Qee cov nroj tsuag cov as-ham yuav poob vim qhov kub thiab txias. Rau cov nroj tsuag no, khov kom qhuav yog ib txoj hauv kev zoo ntawm kev khaws cia thiab khaws cia. Txawm li cas los xij, qee cov nroj tsuag xav tau qhov kub thiab txias kom tshem tawm toxicity. Rau cov nroj tsuag no, tshuaj tsuag kom qhuav tshuab yog qhov zoo tagnrho. Muab cov taum pauv ua piv txwv. Cov txheej txheem concentration yuav tsum muaj qhov kub thiab txias kom tshem tawm cov khoom hu ua trypsin inhibitors (uas yuav cuam tshuam kev zom zaub mov thiab protein decomposition).
Cov tshuaj tsuag kom qhuav yog feem ntau cov kauj ruam kawg hauv kev tsim khoom, uas yog hloov cov tshuaj los ntawm cov kua rau hmoov los ntawm cov tshuaj tsuag tas li, sib tov thiab ziab. Ntawm ntau cov khoom noj khoom siv thev naus laus zis, tshuaj tsuag kom qhuav muaj nws qhov tshwj xeeb zoo. Vim tias qhov kub ntawm cov cuab yeej siv no tsis siab heev, nws tuaj yeem khaws cov saj, xim, thiab khoom noj khoom haus zoo thaum tshem tawm cov kab mob microbial. Cov tshuaj tsuag kom qhuav feem ntau yog siv los tshem tawm cov dej los ntawm cov khoom siv raw. Tsis tas li ntawd, nws muaj ntau yam kev siv, xws li hloov qhov loj, zoo li, los yog ntom ntawm cov khoom. Nws tuaj yeem pab ntxiv lwm cov khoom xyaw thaum lub sijhawm tsim khoom, pab tsim cov khoom nrog cov qauv nruj tshaj plaws. Kev ua haujlwm ntawm cov tshuaj tsuag kom qhuav ua ntej cov tshuaj tsuag kom qhuav, cov taum pauv yuav tsum tau ntxuav thiab tev, thiab cov khoom xyaw uas tsis muaj protein ntau xws li roj yuav tsum tau txo qis, yog li txhawm rau mloog cov khoom noj muaj txiaj ntsig zoo tshaj plaws hauv cov taum pauv. Tom qab xws li concentration, soybeans tuaj yeem tsuag qhuav.
Cov txheej txheem tiag tiag ntawm cov tshuaj tsuag kom qhuav tuaj yeem muab faib ua ob peb kauj ruam:
Ua ntej, cov khoom ua kua yog nkag mus rau hauv lub atomizer, qhov twg lub log siab ceev tig atomizes cov kua, ua rau cov khoom ua cov kua sib xyaw ua ke.
Hauv cov kauj ruam thib ob, cov khoom atomized yog xa mus rau lub tshuab ziab khaub ncaws uas tswj tau qhov kub thiab txias, thiab cua kub evaporates cov kua hauv cov khoom. Txhawm rau kom cov khoom kawg ua tau raws li cov qauv, lub sijhawm sib cuag ntawm cov khoom siv nrog cov cua kub yuav tsum tsim nyog kom muaj qee qhov dej noo hauv cov khoom hmoov; Nyob rau tib lub sijhawm, lub xeev hauv chav ziab yuav tsum tau tswj kom zoo, vim tias qhov loj ntawm chav ziab ziab thiab cov cua ntws tuaj yeem cuam tshuam rau cov khoom noj khoom haus.
Cov kauj ruam thib peb thiab zaum kawg ntawm tag nrho cov kev pab cuam yog khaws cov hmoov hauv cov cua nkag mus rau hauv lub thawv los ntawm cov khoom sib cais, kom cov khoom kawg tuaj yeem ntim los yog tov nrog lwm yam khoom.
Nta:Ceev kom qhuav ceev. Tom qab cov tshuaj tsuag centrifugal, thaj tsam ntawm cov kua pub yog loj heev. Hauv cov huab cua kub kub, 95% - 98% ntawm cov dej tuaj yeem evaporated tam sim ntawd, thiab lub sij hawm ziab tsuas yog ob peb feeb xwb. Kev sib xyaw ua ke ntawm cov tshuaj tsuag kom qhuav tuaj yeem ua rau cov tee dej ntws mus rau tib txoj kev raws li cov cua kub. Txawm hais tias qhov kub ntawm cov cua kub yog siab, cov cua kub nkag mus rau hauv chav tsev ziab thiab tam sim ntawd kev sib cuag nrog cov tshuaj tsuag, ua rau muaj kev poob qis hauv qhov kub hauv tsev, thaum lub teeb ntub dej kub ntawm cov ntaub ntawv yog qhov pib tsis hloov, yog li nws kuj tsim nyog rau ziab cov ntaub ntawv thermosensitive.
Post lub sij hawm: Apr-26-2023