Qhov sib txawv tseem ceeb ntawm decantation thiab filtration yog tias decantation cais ob lub ntsiab lus hauv ib qho sib tov los ntawm kev nchuav tawm ib feem, qhov pom cais ob lub ntsiab lus los ntawm kev lim tawm ib feem.
Ob qhov kev tshem tawm thiab lim cais ob yam hauv cov kua-khoom sib tov lossis sib xyaw ntawm ob cov kua dej tsis sib haum, nyob rau hauv lub zog ntawm lub ntiajteb txawj nqus. Txawm li cas los xij, kev lim dej siv cov ntawv lim lossis lwm cov lim dej haum rau qhov kev sib cais no. Tab sis, decantation tsuas yog nchuav tawm ntawm cov kua kom cais cov khoom lossis lwm cov kua hauv qhov sib tov. Yog li ntawd, filtration yog qhov tseeb tshaj plaws ntawm ob, tab sis decantation kuj tseem siv tau rau qee lub sijhawm.
Decantation yog dab tsi?
Decantation yog cov txheej txheem kev tshuaj xyuas uas cuam tshuam nrog kev sib cais ntawm ob yam khoom tsis sib xws los ntawm kev nchuav tawm ib yam khoom kom cais lwm yam khoom ntawm lub thawv. Peb tuaj yeem siv cov txheej txheem no rau ob lub kua dej tsis sib haum thiab sib xyaw ua kua thiab cov khoom (ib qho kev ncua).
Yog tias qhov sib xyaw ntawm ob cov kua dej tsis sib haum yuav tsum tau muab cais tawm hauv lub thawv, peb tuaj yeem nchuav cov kua dej tsawg dua (nyob rau saum lub thawv). Yog li, qhov no tuaj yeem cais cov kua dej tsawg dua los ntawm cov kua dej siab. Ib yam li ntawd, yog tias peb yuav cais cov kua los ntawm cov khoom hauv qhov kev ncua, peb tuaj yeem nchuav cov kua rau hauv lub thawv sib txawv kom cov khoom nyob hauv lub thawv.
Daim duab 01: Roj thiab dej yog ob yam ua kua tsis zoo
Txawm li cas los xij, qhov kev sib cais no feem ntau yog kev sib cais tsis tiav; piv rau kev pom, nws yog qhov tsawg dua. Tias yog vim li cas, muaj peev xwm tseem tshuav ntawm cov khoom (los yog nrog rau lwm yam immiscible kua) thiab yog hais tias peb yuav ncuav tawm cov kua ntxiv, cov khoom (los yog lwm yam kua) kuj poob rau hauv lub thib ob ntim. Piv txwv rau decantation muaj xws li kev sib cais ntawm cov kua thiab precipitate tom qab nag lossis daus cov tshuaj tiv thaiv, ntxuav cov av nkos los ntawm kev tshem cov av nkos los ntawm dej, thiab lwm yam.
Dab tsi yog Lim?
Filtration yog ib qho kev tshuaj ntsuam xyuas rau kev sib cais ntawm cov khoom ntawm cov kua. Cov txheej txheem no yuav pab tshem tawm cov khib nyiab hauv cov kua los ntawm kev hla cov kua dej los ntawm kev thaiv uas tuaj yeem tuav cov khoom ntawm lub cev, txhua yam lossis kev ua haujlwm lom neeg. Ntawm no, cov kua dej tuaj yeem yog kua lossis roj. Cov kua dej uas peb tau txais tom qab pom yog "filtrate". Qhov teeb meem uas peb siv rau kev pom yog "filter". Nws tuaj yeem yog lim dej los yog lim dej tob; Txawm li cas los xij, nws cuam tshuam cov khoom. Feem ntau, peb siv cov ntawv lim hauv chav kuaj kom pom.
Feem ntau, kev lim dej tsis yog txheej txheem tiav uas ua rau kom huv. Tab sis nws yog qhov tseeb piv rau decantation. Qhov ntawd yog vim qee cov khoom siv tuaj yeem dhau los ntawm cov lim dej thaum qee cov kua dej nyob hauv lub lim yam tsis tau mus rau qhov lim. Ntau hom kev pom muaj xws li kub pom, txias pom, nqus pom, ultrafiltration, thiab lwm yam.
Daim duab 02: Nqus Lim Tshuab
Cov ntawv thov loj ntawm cov txheej txheem pom muaj xws li hauv qab no:
- Yuav cais cov kua thiab cov khoom hauv kev ncua
- kas fes lim: cais kas fes hauv av
- Siv lim kom cais cov hlau muaj txiaj ntsig thaum lub sijhawm mining
- Yuav cais cov muaju los ntawm cov tshuaj thaum lub sij hawm recrystallization txheej txheem hauv organic chemistry
- Lub tshuab hluav taws xob siv qhov pom los tiv thaiv lub tshuab hluav taws xob los ntawm fouling nrog particulates
Dab tsi yog qhov txawv ntawm Decantation thiab Lim?
Ob qhov kev tshem tawm thiab lim cais ob yam hauv cov kua-khoom sib tov lossis sib xyaw ntawm ob cov kua dej tsis sib haum, nyob rau hauv lub zog ntawm lub ntiajteb txawj nqus. Qhov sib txawv tseem ceeb ntawm decantation thiab filtration yog tias decantation cais ob lub ntsiab lus hauv kev sib xyaw los ntawm kev nchuav tawm ib feem, qhov pom kev cais ob lub ntsiab lus los ntawm kev lim tawm ib feem.
Hauv qab infographic muab cov ncauj lus kom ntxaws ntxiv txog qhov sib txawv ntawm kev txiav tawm thiab lim.
Summary – Decantation vs Filtration
Ob qhov kev tshem tawm thiab lim cais ob yam hauv cov kua-khoom sib tov lossis sib xyaw ntawm ob cov kua dej tsis sib haum, nyob rau hauv lub zog ntawm lub ntiajteb txawj nqus. Txawm li cas los xij, qhov sib txawv tseem ceeb ntawm decantation thiab filtration yog tias decantation cais ob yam hauv kev sib xyaw los ntawm kev nchuav tawm ib feem, qhov pom cais ob lub ntsiab lus los ntawm kev lim tawm ib feem.
