Dab tsi Ultrasonic Sonochemical Equipment tuaj yeem siv rau?

Dab tsi Ultrasonic Sonochemical Equipment tuaj yeem siv rau?

Ultrasonic Cavitation:

Thaum cov kua tau kho nrog lub siab siv ultrasound, lub suab tsis propagating rau hauv cov kua nruab nrab tsim alternating cycles ntawm kev kub siab (compression) thiab tsis tshua muaj siab (sparse), tus nqi uas nyob ntawm qhov zaus. Thaum lub sij hawm qis-siab cycling, high-siv ultrasonic tsis tsim me me nqus npuas los yog voids nyob rau hauv cov kua. Thaum cov npuas nkag mus txog qhov ntim uas lawv tsis tuaj yeem nqus tau lub zog lawm, lawv tawg ua rau lub sijhawm muaj kev kub ntxhov, ib qho tshwm sim hu ua "cavitation." Thaum lub sij hawm tawg, kub heev (kwv yees 5,000K) thiab siab (kwv yees 2,000 atm) yuav mus txog hauv zos. Lub cev qhuav dej ntawm cov npuas cavitation kuj ua rau lub dav hlau ua kua nrog qhov nrawm txog li 280 m / s, thiab qhov tshwm sim shear force mechanically stirs cov kua kom huv si sib tov cov reactants.

Yog li ntawd, nrog rau cov nyhuv cavitation ntawm ultrasonic tsis nyob rau hauv cov kua, ultrasonic sonochemical khoom yuav siv tau rau extraction, crushing, nws, emulsification, dispersion, stirring, defoaming thiab degassing, thiab accelerating tshua.

1. Dispersion

Ultrasonic dispersion yog raws li cov kua raws li qhov nruab nrab, thiab high-frequency ultrasonic vibration yog ntxiv rau cov kua. Txij li thaum ultrasound yog ib tug neeg kho tshuab nthwv dej, nws tsis absorbed los ntawm molecules thiab ua rau vibrational suab ntawm molecules thaum propagation. Raws li cov nyhuv cavitation, uas yog, nyob rau hauv cov teebmeem ntxiv ntawm qhov kub thiab txias, kev kub siab, micro-jet, thiab muaj zog vibration, qhov kev ncua deb ntawm molecules nce lawv qhov nruab nrab ntawm kev co, uas nws thiaj li ua rau molecular fragmentation. Lub siab sai tso tawm los ntawm ultrasound lov lub van der Waals rog ntawm cov hais, ua rau nws tsis tshua muaj hais tias cov hais yuav agglomerate ua ke. Piv nrog cov txheej txheem dispersion, ultrasonic dispersion tshuab muaj kev ua haujlwm siab thiab lub sijhawm luv. Muaj kev siv hauv kev tsim cov graphene, nanomaterials, roj thiab xim.

2. Emulsification

Nyob rau hauv qhov kev txiav txim ntawm ultrasonic zog, ob los yog ntau tshaj immiscible kua yog tov ua ke, thiab ib tug kua yog uniformly dispersed nyob rau hauv lwm yam kua los ua ib tug emulsion zoo li kua. Cov txheej txheem no yog hu ua ultrasonic emulsification. Qhov loj tshaj feature ntawm ultrasonic emulsification yog tias tsis muaj emulsifier yuav tsum tau. Tsis tas li ntawd, ultrasonic emulsification tuaj yeem tswj tau hom emulsion, tsim emulsion ruaj khov dua, thiab qee qhov ruaj khov rau ob peb lub hlis mus rau ntau tshaj ib nrab xyoo; Cov emulsion npaj muaj ib tug siab concentration, lub concentration ntawm ntshiab emulsion yuav tshaj 30 feem pua, thiab cov emulsifier ntxiv tuaj yeem ncav cuag 70 feem pua; Phacoemulsification kuj tseem tuaj yeem npaj cov emulsions uas tsis tuaj yeem npaj los ntawm cov txheej txheem pa. Piv txwv li, txoj kev sib xyaw ua ke tsuas tuaj yeem tsim tau 5 feem pua ​​​​ntawm paraffin emulsion hauv dej, thaum nws yog qhov tsis txaus ntseeg tias 20 feem pua ​​​​ntawm paraffin emulsion tuaj yeem tsim nyob rau hauv qhov kev txiav txim ntawm lub zog ultrasonic. Lub peev xwm emulsification ntawm cov khoom siv ultrasonic emulsification hauv chav kuaj tau paub zoo thiab siv tau ntev, thiab nws yog siv rau hauv kev lag luam rau kev ua haujlwm siab emulsification ntawm huab hwm coj ntau lawm hauv cov nroj tsuag ntau lawm, xws li tshuaj pleev ib ce thiab cov khoom tu tawv nqaij, tshuaj pleev xim. , xim, lubricants thiab roj thiab lwm yam.