Cov nyhuv ultrasonic cavitation yog hais txog kev sib hloov compression thiab nthuav tawm ntawm cov kua molecules li ultrasound propagates hauv cov kua. Thaum lub suab siab nce mus txog qhov tseem ceeb, ntau qhov me me cavitation npuas tsim nyob rau hauv cov roj diesel. Cov cavitation npuas no nthuav dav sai thiab ua rau lub cev qhuav dej hauv lub sijhawm luv luv (nanoseconds), tam sim ntawd tso tawm qhov kub thiab txias hauv zos (ntau tshaj 5000K) thiab kev ntxhov siab (ntau pua MPa), thaum tib lub sijhawm ua rau muaj zog poob siab, microjets, thiab shear rog. Qhov chaw ntawm lub cev hnyav no cuam tshuam qhov sib npaug ntawm cov qauv molecular hauv cov roj diesel, ua tiav ntau yam kev kho mob: ntawm ib sab, lub zog shear quab yuam rhuav tshem cov pawg loj molecular, impurity hais, thiab dej hauv cov roj diesel rau hauv micron lossis txawm nanometer - qhov loj me, dispersing lawv uniformly thoob plaws hauv cov roj diesel; Ntawm qhov tod tes, qhov kub thiab siab siab tsim los ntawm cov nyhuv cavitation accelerates qhov kev hloov pauv thiab kev sib cais ntawm cov khoom tsis zoo hauv cov roj diesel, tsim kom muaj kev sib haum xeeb rau kev kho kom huv tom qab. Ntxiv nrog rau cov nyhuv cavitation, cov neeg kho tshuab cov nyhuv ntawm ultrasound tuaj yeem ua kom muaj kev sib tw siab - zaus ntawm cov roj diesel, txhim kho kev sib xyaw thiab txhim kho kev ua haujlwm sib xws. Cov nyhuv thermal, los ntawm ib nrab hloov dua siab tshiab ntawm ultrasonic zog, me ntsis nce lub diesel roj kub, pab kom optimize kev ua tau zoo yam tsis muaj kev puas tsuaj rau lub cev thiab tshuaj zog ntawm cov roj diesel, yog li tswj nws cov yam ntxwv roj thoob plaws hauv cov txheej txheem.
Ultrasonic diesel emulsification: Txhim kho combustion efficiency thiab txo cov pa phem emissions.
Ultrasonic emulsification yog ib qho ntawm cov kev siv tseem ceeb ntawm ultrasonic diesel roj kho. Nws lub hauv paus ntsiab lus tseem ceeb yog tsim cov dej zoo sib xws thiab ruaj khov - diesel emulsion (WIDE) nyob rau hauv qhov kev txiav txim ntawm ultrasonic cavitation, nrog cov dej ntsiab lus feem ntau yog li ntawm 5% mus rau 25%. Txij li cov dej thiab cov roj diesel tsis zoo, cov cavitation shear quab yuam ntawm lub ultrasound tuaj yeem rhuav tshem cov tee dej rau hauv nanoscale hais, uniformly dispersing lawv nyob rau hauv lub diesel roj los tsim ib tug ruaj khov emulsion system. Qhov no tshem tawm qhov xav tau ntau ntawm cov tshuaj emulsifiers, lossis tsuas yog xav tau me me los txhim kho kev ruaj ntseg.
Qhov no emulsified diesel roj muaj qhov zoo tseem ceeb thaum lub sij hawm combustion: thaum nws nkag mus rau hauv lub combustion chamber, cov tee dej sai sai vaporize thiab nthuav nyob rau hauv qhov kub thiab txias, rhuav tshem qhov nro ntawm lub diesel roj droplets thiab ua tiav theem nrab atomization. Qhov no ua rau kom qhov chaw sib txuas ntawm cov roj diesel thiab huab cua, uas ua rau muaj kev sib txuas ntau dua thiab txo cov roj noj ntawm kwv yees li 5%. Hauv qee qhov xwm txheej, kev siv roj tuaj yeem txhim kho los ntawm 15% - 20%. Nyob rau tib lub sijhawm, cov txheej txheem vaporization ntawm cov tee dej nqus cov cua kub ntau, txo qis hauv zos adiabatic combustion kub hauv chav combustion, thiaj li txo cov nitrogen oxide (NOx) emissions txog li 40% thiab cov teeb meem (PM) emissions los ntawm ntau tshaj 30%, thiab txawm tag nrho tshem tawm cov pa phem ib puag ncig. Tsis tas li ntawd, emulsified diesel tuaj yeem txo cov pa roj carbon deposits hauv lub cav, txo cov khoom siv, thiab ua kom lub neej ntev ntawm lub cav, ua rau nws tsim nyog rau cov khoom siv roj av xws li logistics fleets, nkoj cav, thiab cov khoom siv hluav taws xob.
Tam sim no, cov tuam txhab lag luam hauv tsev tau ua tiav qhov loj - nplai ntawm cov khoom siv ultrasonic emulsified diesel, nrog ib chav ua haujlwm txog li 20 tons hauv ib hnub thiab emulsification stability (tsis muaj stratification tom qab 48 teev) ncav cuag 99%. Cov cuab yeej siv no tau siv rau cov phiaj xwm roj optimization hauv cov tuam txhab xws li Sinopec thiab PetroChina, pab cov tuam txhab logistics loj txo cov nqi roj.