YAM DAB TSI YOG HAIV NEEG YUAV TSUM TXOG ULTRASONIC DEGRADATION NYOB HAUV CHAW TSEV?
Lub ntsiab yam cuam tshuam rau ultrasonic degradation hauv cov dej phwj tuaj yeem muaj roj gas, pH nqi, fab kub, ultrasonic zog siv thiab ultrasonic zaus :
1. Muaj cov txheej txheem cov kua roj muaj peev xwm muab cavitation nucleus, tswj cov teebmeem cavitation, thiab txo cov cavitation qhov kev sib tshuam. Muaj ob lub ntsiab lus tseem ceeb rau kev cuam tshuam ntawm ultrasonic degradation tus nqi thiab degradation: A. Qhov thiab cavitation ntawm yaj roj rau ntawm cavitation npuas. Lub zog muaj kev cuam tshuam tseem ceeb; B, cov dawb radicals uas ua los ntawm cov pa roj carbon huab cua xws li N2O2 kuj koom rau hauv cov txheej txheem degradation, yog li ntawd, cuam tshuam rau cov tshuaj tiv thaiv txoj cai thiab cov thermodynamic thiab kev coj cwj pwm ntawm qhov degradation.
2. Rau qhov degradation ultrasonic ntawm cov organic acid alkaline, pH tus nqi ntawm cov tshuaj muaj ib tus cawv zoo. Thaum lub txiaj ntsim pH ntawm cov tshuaj yog qhov me me, cov tshuaj muaj peev xwm ua tau cov pa no ua rau lub cavitation npuas thiab ncaj qha pyrolyze hauv cavitation npuas; tib lub sij hawm, oxidation tshua tshwm sim ntawm cov roj-kua nruab nrab ntawm cov cavitation npuas thiab cov dawb radicals generated los ntawm cov cavitation ntawm cov kav dej. Kev ua haujlwm siab degradation. Thaum tus nqi pH ntawm qhov kev daws loj, cov organic tsis tuaj yeem tsis tau evaporate rau hauv cavitation npuas, thiab qhov tshuaj oxidation tshwm sim nrog cov dawb radicals nkaus xwb ntawm qhov roj-kua nruab nrab ntawm cov cavitation npuas, thiab qhov degradation efficiency kuj raug tsawg. Yog li no, cov kev hloov ntawm cov pH ntawm cov tshuaj yuav tsum zoo li sai tau rau cov organic teeb meem nyob rau hauv daim ntawv ntawm nruab nrab molecules thiab yooj yim rau volatilize hauv tub ntxhais npuas.
3. Kub muaj ib qho tseem ceeb heev ntawm kev siv thiab kev puas hlwb ntawm ultrasonic cavitation, ua rau muaj kev hloov hauv tus nqi thiab qhov kawg ntawm ultrasonic degradation. Qhov nce hauv kub yog pab kom ceev cov tshuaj tiv thaiv, tiam sis qhov ultrasonic hob degradation mas vim cov nyhuv cavitation. Thaum lub ntsuas kub siab dhau lawm, cov dej kub nyhiab hauv lub voj voog ib nrab ntawm lub suab thiab cov cavitation-ntxias siab yog txo. Npuas tam sim ntawd muaj cov dej ua paug thiab txo qhov kub siab ua los ntawm cavitation, yog li ua rau txo cov kev ua kom degradation. Kev ua kom tiav sonochemical tsawg zuj zus uas nce zuj zus. Yog li, qhov tsawg kub (tsawg tshaj li 20 ° C) yog ntau txoj kab rau ultrasonic degradation thwmsim, feem ntau ntawm chav sov.
4 . Tshawb nrhiav pom tias tsis ntau dua qhov zaus, qhov zoo dua qhov degradation effect. Ultrasonic zaus muaj feem xyuam rau txoj cai ntawm kev degradation ntawm cov pa paug, muaj ib zaus zoo ntawm kev degradation tshua raws li dawb radicals; degradation tshua raws li pyrolysis, thaum lub suab ultrasonic yog muaj zog tshaj qhov cavitation chaw, raws li qhov kev nce qeeb, nce tus nqi ntawm kev txhais lus.
5. Lub hwj huam ultrasonic hais txog tag nrho cov acoustic zog xa mus rau hauv cov tshuaj tiv thaiv qhov system txhua lub sij hawm los ntawm cheeb tsam ntawm chav tsev ntawm ultrasonic emission. Nws feem ntau ntsuas los ntawm lub zog ntawm ib chav tsev irradiation. Feem ntau, ntau dua qhov ultrasonic zog siv, qhov ntau paaj nws yog rau degradation cov tshuaj tiv thaiv, tab sis, thaum nws loj dhau, cov cavitation npuas yuav shielded, thiab ultrasonic zog siv tau siv los txo cov zog thiab degradation tus nqi yuav raug txo.
Nrhiav ib txoj kev kho kev rau ultrasonic degradation hauv cov kav dej phwj tuaj?
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