Antifoam, tseem hu ua defoamer, yog ib qho tshuaj ntxiv uas siv rau hauv cov txheej txheem kho dej khib nyiab los tswj kev ua npuas dej.Ua npuas ncauj yog ib qho teeb meem tshwm sim hauv cov chaw kho dej khib nyiab thiab tuaj yeem tshwm sim los ntawm ntau qhov chaw xws li cov organic teeb meem, surfactants, lossis agitation ntawm cov dej.Thaum ua npuas ncauj yuav zoo li tsis muaj teeb meem, nws tuaj yeem cuam tshuam qhov kev ua haujlwm ntawm cov txheej txheem dej khib nyiab los ntawm kev cuam tshuam nrog cov khoom siv, txo cov txiaj ntsig ntawm kev kho tshuaj, thiab muaj peev xwm ua rau muaj kev cuam tshuam los yog nqa cov teeb meem.
Antifoam cov neeg ua haujlwm ua haujlwm los ntawm destabilizing npuas npuas, ua rau lawv tawg lossis coalesce, yog li txo cov npuas lub ntim thiab tiv thaiv nws los ntawm kev cuam tshuam nrog cov txheej txheem kho.Cov neeg ua haujlwm no feem ntau muaj kev sib xyaw ntawm surfactants, roj, silicones, lossis lwm yam tshuaj hydrophobic.Thaum ntxiv rau cov dej khib nyiab, cov tshuaj tua kab mob txav mus rau qhov chaw ntawm cov npuas dej thiab cuam tshuam qhov nro, ua rau tawg ntawm npuas npuas.
Muaj ntau ntau hom tshuaj tiv thaiv kab mob siv hauv kev kho dej khib nyiab, txhua tus muaj nws tus kheej tshwj xeeb thiab kev siv:
Silicone-based antifoams:
Cov no yog cov feem ntau siv antifoam agents vim lawv cov hauj lwm zoo nyob rau ntau yam kev mob.Silicone-based antifoams yog ruaj khov, insoluble hauv dej, thiab tuaj yeem tsim kom haum rau ntau yam kev kho dej khib nyiab.
Qhov zoo ntawm organosilicon defoamers:
Cov tshuaj zoo inertness, tsis hnov mob nrog lwm yam tshuaj, tuaj yeem siv rau hauv cov kua qaub, alkaline, thiab ntsev.
Zoo physiological inertness, haum rau siv nyob rau hauv cov zaub mov thiab tshuaj industries, tsis muaj kuab paug rau ib puag ncig
Nruab nrab thermal stability, tsis tshua muaj volatility, thiab tuaj yeem siv ntau qhov kub thiab txias
Tsawg viscosity, kis tau sai ntawm cov roj-kua interface
Qhov nro saum npoo yog tsawg li 1.5-20 mN / m (dej yog 76 mN / m)
Tsis soluble nyob rau hauv surfactants ntawm foaming systems
Tsawg npaum li cas, tsawg viscosity, thiab tsawg flammability
Polymeric antifoams:
Cov tshuaj tiv thaiv kab mob no yog ua raws li cov polymers uas cuam tshuam kev ua npuas ncauj los ntawm adsorbing mus rau saum npoo ntawm npuas npuas thiab hloov lawv qhov ruaj khov.Polymeric antifoams feem ntau yog siv nyob rau hauv cov xwm txheej uas cov tshuaj antifoam tej zaum yuav tsis zoo, xws li nyob rau hauv heev alkaline los yog acidic khib nyiab.
Lwm yam antifoams:
Qee zaum, silicone-based antifoams yuav tsis haum vim kev txhawj xeeb txog kev siv tshuab lossis cov txheej txheem tshwj xeeb.Non-silicone antifoams, xws li ntxhia roj los yog fatty acid-based antifoams, muaj lwm txoj hauv kev uas yuav ua rau tus phooj ywg zoo dua lossis zoo dua rau qee yam kev siv.
Hmoov antifoams:
Qee cov tshuaj tiv thaiv kab mob muaj nyob rau hauv daim ntawv hmoov, uas tuaj yeem ua tau zoo nyob rau hauv cov ntawv thov uas cov kua additives tsis siv tau los yog qhov yuav tsum tau ua haujlwm ntev.
Kev xaiv ntawm tus neeg saib xyuas cov tshuaj tiv thaiv tsim nyog nyob ntawm cov yam ntxwv xws li qhov xwm txheej ntawm cov dej khib nyiab, cov txheej txheem kev kho tshwj xeeb raug ua haujlwm, cov kev cai tswj hwm, thiab cov nqi txiav txim siab.Ntxiv nrog rau kev xaiv tus neeg saib xyuas cov tshuaj tiv thaiv zoo, kev siv tshuaj kom zoo thiab siv cov txheej txheem yog qhov tseem ceeb los xyuas kom meej ua npuas ncauj tswj tau zoo yam tsis muaj kev cuam tshuam rau kev kho dej khib nyiab.
Thaum cov tshuaj tua kab mob muaj txiaj ntsig zoo hauv kev tswj cov npuas dej hauv cov txheej txheem kho dej khib nyiab, nws yog ib qho tseem ceeb uas yuav tsum tau siv lawv cov kev txiav txim siab kom tsis txhob muaj qhov tshwm sim tsis zoo xws li cuam tshuam nrog cov txheej txheem kev kho mob lom lossis tso tawm cov khoom tsis zoo rau hauv ib puag ncig.Kev saib xyuas ntawm cov npuas dej tsis tu ncua thiab kev hloov kho cov tshuaj tiv thaiv kab mob raws li qhov xav tau tuaj yeem pab txhim kho ua npuas ncauj tswj thaum txo qis kev cuam tshuam tsis zoo rau kev kho dej khib nyiab thiab kev ua raws li ib puag ncig.
Post lub sij hawm: Apr-01-2024