Ultrasonic sib cais tshuab
Xyoo tsis ntev los no, ntau qhov ntau zaus ultrasonic suab tsis nrog ntau tshaj 400 kHz tau siv dav hauv ntau cov ntawv thov uas txhais tau tias txhim kho tus nqi rov qab ntawm cov khoom noj hauv cov khoom sib xyaw. Lub premise ntawm kev sib cais ultrasonic yog kom ua tiav qhov tseem ceeb ntawm cov txheej txheem kev sib cais tsis muaj kev hloov lub cev lossis tshuaj lom neeg ntawm cov zaub mov. Daim ntawv thov ntawm ultrasonic sawv vuam tsis muaj txiaj ntsig kev tshwj xeeb rau ib leeg kev poob qis lossis ib qho me me ntawm qhov siab nkees lossis antinodes hauv cov reactor, uas ua rau muaj peev xwm ntau ntxiv uas lawv yuav tsim los lossis coalesce rau hauv cov chaw loj dua sai dua. Lub siab qhov loj me ntxiv txhawb nqa kev hloov mus los lossis kev ziab, yog li ua kom txoj kev sib thooj ntawm cov khoom sib xyaw kom sib cais. Tshooj lus no yuav nthuav qhia lub ntsiab cai tseem ceeb tom qab cov thev naus laus zis no thiab yuav siv li cas rau cov khoom lag luam kev ua khoom noj tam sim no. Nws yuav ua kom pom daim ntawv thov ntawm cov thev naus laus zis hauv kev ua zaub mov noj, kev ua lag luam ua tiav ntawm kev lag luam ua cov roj xibtes thiab kev muaj peev xwm yav tom ntej ntawm cov khoom siv mis nyuj thiab cov khoom siv roj ntsha.
Ultrasonic sib cais
Taw qhia rau Ultrasonic Sib Cais
Cov kev tsim cov khoom noj ultrasonic tau kawm rau ntau xyoo, thiab daim ntawv thov yog cov neeg ntse nyob rau hauv ntau zaus ntawm 20-100kHz. Thaj chaw no feem ntau hu ua" lub zog ultrasonic" thaj chaw. Ntawm no, tej zaum yuav muaj qhov tshwm sim hu ua acoustic cavitation. Kev siv ultrasonic tsis siv lub tshuab ua kom muaj zog rau cov kua, ua rau cov roj uas twb muaj lawm hauv kev daws teeb meem los ua npuas uas nthuav thiab cog lus. Vim kev coalescence thiab huab hwm coj hloov mus, cov npuas no yuav dhau sijhawm thiab vau thaum lawv mus txog lub npuas npuas hu ua resonance loj. Kev sib tsoo txheej xwm feem ntau muaj qhov sib zog, ua rau qhov kub siab nce mus txog 10,000 K, ua rau lub zog ua rau lub zog poob ntas ntawm ntau pua qhov chaw huab cua nyob hauv qhov chaw hauv zos ntawm cov npuas uas tsaus muag. Cov txiaj ntsig ntawm lub cev no tuaj yeem siv tau rau kev txiav plaub hau, sib xyaw thiab cua sov, thiab tsim nyog rau cov ntawv thov zaub mov ua noj xws li emulsification, homogenization, rho tawm lossis kho cua sov.
Ultrasonic sib cais siv tshuab feem ntau yog siv cov loj siv hluav taws xob (GG gt; 0.4 MHz mus rau ntau MHz) cais cov khoom noj kua thiab / lossis cov khoom tso tawm hauv kua. Ntawm cov zaus ntau dua, ntau dua ntawm cov shear thiab lub cev puas vim los ntawm kev ua cavitation ua npuas tawg yog yuav luag tsis pom kev. Ua ntej, qhov pib ntawm lub cavitation nce nrog qhov nce ntawm ultrasound zaus, uas txo qhov tshwm sim ntawm qhov teeb meem vau. Ntxiv rau, resonance loj ntawm lub npuas tawg kuj yog inversely xwm yeem rau lub zaus ntawm lub suab yoj. Raws li cov resonance loj txo, lub zog ntawm npuas txheej xwm poob qis, thiaj li hais tias thaum lub zaus loj dua 1mhz, cov txheej xwm vau no dhau los ua benign. Yog li no, ultrasonic sib cais yog txawv los ntawm kev siv ua ultrasonic. Nws lub hom phiaj yog ua tiav" benign" kev los ntawm kev zam qhov ua txhaum cai npuas tawg.
Kev siv tshuab cais tawm hauv cov khoom noj
Cov txheej txheem kev cais zaub mov ib txwm muaj nrog kev ua centrifugation, nag lossis daus kom pom tseeb, ua kom pom kev ua tshuaj lom neeg hauv flocculation thiab membrane pom. Cov txheej txheem sib cais no tau muab pov thawj thiab kev ua haujlwm ruaj khov.
Txawm li cas los xij, lawv tseem muaj qee qhov teeb meem, suav nrog tab sis tsis txwv rau cov nram no:
1.High zog noj;
2. Tshaj dhau kev txiav plaub hau tuaj yeem ua rau kev ncaj ncees ntawm cov khoom;
3.Cov txheej txheem ua kom tsis pub dhau cov khoom tawm los yog yuav tsum tau tu kom ntau;
4.Qhov kev sib cais nrawm yog qeeb;
5.Txoj kev siv tshuaj ntau.
Ultrasonic sib cais tuaj yeem siv ib leeg los yog ua ke nrog cov thev naus laus zis txhawm rau txhim kho cov txheej txheem ua haujlwm.
Hauv kev lag luam khoom noj khoom haus, kev sib cais ultrasonic yog qhov ua tau zoo hauv peb lub ntsiab:
Ua ntej yog flocculation lossis kev txhim kho kev sib xyaw ua ke, uas yog, daim ntawv thov ntawm ultrasonic sawv vuag hauv kev paub meej lossis cov tshuaj flocculation tshuab muaj peev xwm nce tus nqi ntawm qhov kev sib cais tshwm sim, yog li txo lub sijhawm nyob thiab / lossis tshuaj nyob. Nws tuaj yeem txo cov nqi, nce ntxiv thiab txo qis kab ntawv ecological.
Qhov txheej txheem thib ob yog kev kho mob ua ntej lossis kho ua ntej ntawm cov zaub mov pem hauv ntej, thiab tom qab ntawd nqa cov haujlwm sib cais. Cov tswv yim no tau tshwj xeeb hauv kev ua haujlwm nrog cov khoom noj uas tsis txawv txav, xws li cov khoom noj uas muaj cov khoom ua kua, kua thiab ua kua. Piv txwv li, cov ntaub tev ntawm cov txiv maj phaub txiv ntoo. Daim ntawv thov ntawm ultrasound tsis tsuas yog pib ua lub polymerization ntawm cov ntaub ntawv, thiab qhov sib cais nrawm nrawm dua hauv cov txheej txheem nqes dej dua qub, tab sis kuj tseem maj mam ua lub cev shear muab los ntawm ultrasound tuaj yeem pab tso tawm ntau cov khoom lag luam. Qhov no tuaj yeem muab cov khoom lag luam theem ruaj khov rov qab thiab txo qhov yuav tsum tau siv hluav taws xob los ntawm kev nrawm dua thiab ua haujlwm tau zoo tshaj qhov nqes dej. Ua ke nrog cov kev sib cais uas twb muaj lawm xws li kev sib cais centrifugal, nws tuaj yeem txuag ntau lub zog.
Thaum kawg, megasonic kev sib cais tsis xws luag (xws li zaus, theem hwj chim, thiab lub sijhawm nyob hauv tsev) tuaj yeem kho kom haum rau kev xaiv tshem tawm qhov me me ntawm qee qhov ntau thiab tsawg. Yog li, nws tuaj yeem raug siv los ua cov cuab yeej fractionation rau cov khoom xyaw khoom noj khoom haus dispersed hauv ntu txuas ntxiv. Los ntawm cov fractionating mus rau hauv cov kwj deg uas muaj zaub mov ntau dua lossis cov txiaj ntsig zoo, cov cheebtsam uas yuav muab ntxiv yog: rog, protein, carbohydrate, thiab fiber. Vim li no, ultrasonic kev cais tshuab yog ntxiv rau cov txheej txheem kev sib cais membrane uas twb muaj lawm.
