Qhov sib txawv tseem ceeb ntawm kev qhia meej thiab pom yog qhov kev qhia meej yog hais txog kev tshem tawm cov khoom me me ntawm cov kua dej, qhov pom yog hais txog kev qhia meej ntawm cov kua uas muaj cov khoom siv los ntawm kev lim tawm cov kua los ntawm lub lim.
Kev qhia meej yog ib lub ntsiab lus dav uas suav nrog ntau txoj hauv kev qhia kom meej cov kua dej uas muaj cov khoom me me raws li impurities. Lim yog ib hom kev qhia meej. Ntxiv nrog rau kev pom, cov kev qhia meej muaj xws li sedimentation, nag lossis daus, sib nqus sib nqus, thiab lwm yam.
Kev nthuav qhia yog dab tsi?
Kev qhia meej yog txheej txheem ntawm kev qhia meej cov kua uas muaj cov khoom me me ntawm kev tshem tawm cov khoom ntawm cov kua. Muaj ntau txoj hauv kev uas peb tuaj yeem siv los qhia meej txog cov kua uas muaj paug. Kev lim dej, lub ntiajteb txawj nqus sedimentation, centrifugal sedimentation, thiab sib nqus sib nqus yog txoj kev qhia meej. Cov hom tshuaj uas peb siv rau qhov kev qhia meej no yog hu ua tus neeg saib xyuas kom meej. Clarifying agents feem ntau koom nrog hauv kev tsim cov clumps hauv cov khoom sib kis, uas ua rau nws yooj yim dua tshem tawm ntawm cov kua. Peb hu nws "inducing flocculation".
Daim duab 01: Kev nthuav qhia ntawm Sedimentation
Sedimentation yog ib hom nag lossis daus uas peb tuaj yeem ua cov av ntawm cov khoom paug ntawm cov txheej txheem xws li centrifugation lossis tawm hauv qab lub zog ntawm lub ntiajteb txawj nqus mus txog rau hauv cov ntaub ntawv sediment. Nyob rau hauv txoj kev no, cov khoom hais ua ib tug precipitate nyob rau hauv qab ntawm lub. Tom qab ntawd peb tuaj yeem yooj yim tau cov kua purified los ntawm decantation.
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 peb tau txais tom qab pom yog "filtrate". Qhov thaiv 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.
Daim duab 02: Lim Apparatus rau Nqus Lim
Feem ntau, kev lim dej tsis yog txheej txheem tiav uas ua rau kom huv. Txawm li cas los xij, 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.
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
Qhov txawv ntawm Kev Tshaj Tawm thiab Kev Pom Zoo yog dab tsi?
Kev lim dej yog hom kev qhia meej. Qhov sib txawv tseem ceeb ntawm kev qhia meej thiab kev pom yog qhov kev qhia meej yog hais txog kev tshem tawm cov khoom me me ntawm cov kua dej, qhov pom tau hais txog kev qhia meej ntawm cov kua uas muaj cov khoom siv los ntawm kev lim tawm cov kua los ntawm lub lim. Ob txoj hauv kev no tseem ceeb hauv kev ua kom huv cov kua uas muaj cov khoom tsis huv.
Hauv qab infographic tabulates qhov sib txawv ntawm kev qhia meej thiab pom.
Summary – Clarification vs Filtration
Kev lim dej yog hom kev qhia meej. Qhov sib txawv tseem ceeb ntawm kev nthuav dav thiab kev pom yog tias qhov kev qhia meej yog hais txog kev tshem tawm cov khoom me me ntawm cov kua dej kom meej cov kua, qhov pom yog hais txog kev qhia meej ntawm cov kua uas muaj cov khoom siv los ntawm kev lim tawm cov kua los ntawm lub lim.
