Nrog rau ntau dua thiab siv ntau tus activated alumina hauv ib co ntawv. txoj hauj lwm tseem ceeb heev yog ua kom muaj kev ua ub ua no rau cov neeg siv. Tam sim no peb tsuas hais qhov activated alumina regeneration.
Thaum activated alumina yog siv rau ib lub sij hawm ntawm lub sij hawm, cov adsorption equilibrium yog mus txog. Yog tias nws tsis tiav nyob rau lub sijhawm, nws siv tsis tau dua. Los ntawm kev lag luam lossis kev nrhiav kev lag luam, txoj kev pib ntawm alumina activated yog qhov zoo tshaj plaws txoj kev.
Feem ntau, tag nrho cov tshuaj muaj peev xwm tawm tswv yim, tab sis tsuas yog dej cawv paug los yog cov av zoo heev yuav siv tau raws li cov adsorbents vim lawv thaj tsam loj. Cov adsorbent yuav tsum tau ua raws li cov cai hauv qab no: muaj peev xwm nthuav tawm peev; zoo adsorption selectivity; tsawg adsorption equilibrium concentration; yooj yim dua qub thiab rov qab siv dua; zoo mechanical zog; cov tshuaj muaj zog ruaj khov; Nws yog qhov yooj yim rau cov adsorbent kom tau raws li cov cai ntawm cov xya yam ntawm tib lub sijhawm. Yog li, nws yuav tsum raug xaiv raws li ntau zaus.
ctivated alumina yog ib qho nyuaj, aqueous alumina particle. Tom qab lub cev tsis huv thiab qhib lub cev, cov dej alumina yog qhib kom tsim tau cov qauv ntawm cov khoom cua lossis cov hmoov, uas yuav siv tau ziab ntawm cua lossis roj, concentration thiab desulfurization ntawm cov roj carbon coconut los yog roj av roj, txhim kho cov roj coking qhov cub lossis roj refinery , thiab cov zoo li no.
Kev tsim hluav taws xob yog txoj kev zoo tshaj plaws rau kev pib ua rau lub alumina activated nrog saturated activated organic saturated, thiab yog dav siv. Los ntawm externally cua sov lub activated activated alumina, lub adsorption equilibrium kev sib raug zoo yog hloov mus ua lub hom phiaj ntawm desorption los yog decomposition ntawm cov khoom organic absorbed. Activated alumina, nquag siv rau qhov adsorption ntawm cov khoom ntaws tsis taus, yuav ua kom tsis zoo thiab tsim dua tshiab ntawm qis dua. Thaum tshav kub kub txoj kev rov qab muaj xws li kub kub rov rau txoj kev thiab sov li kub dua qub. Qhov kub-kub cua sov txoj kev rov ua rau lub activated activated alumina los ntawm kev ziab thiab kev ua kom nyob rau hauv ib lub qhov cub tawg. Ua rau hauv lub cub tawg, nws yog dehydrated thiab rhaub mus rau kub dua 150 ° C kom qhuav dej rau hauv cov pores ntawm activated alumina thiab ib feem ntawm cov ntxhuav roj tsawg. Cov txheej txheem alumina activated yog maj qhuav, thiab ces cov alumina yog oxidized nyob rau hauv cov neeg mob ntshiv. Qhov kub yog tsa rau 350 degrees, thiab desorption thiab desorption ntawm adsorbate nyob rau hauv lub pores ntawm activated alumina yog tiav
Rau qhov alumina activated rau cov ntaub ntawv thov kev kho dej, yuav ua li cas thiaj ua alumina tsuaj?
Ua rau alumina siv nyob rau hauv cov dej purification niaj hnub no yog cov dawb kheej kheej kheej kheej. Nws muaj qhov zoo li cov xim me me, qhov dav du, cov neeg kho tshuab loj, muaj zog hygroscopicity, thiab muaj zog txaus ntawm cov tshuaj fluorine. Nws tsuas yog siv rau cov dej haus hauv cov cheeb tsam uas muaj cov tshuaj fluoride. Tshem tawm cov tshuaj fluoride. Txawm li cas los, txhua yam khoom muaj kev pab cuam lub neej los yog kev pab cuam lub neej. Ua rau alumina yog tsis muaj kev zam. Tom qab siv lub sijhawm ntev ntev, lub pob ntseg qhib lub ntsej muag zoo nkauj daj-xim av, thiab cov nyom ntawm cov defluoridation yog txo. Nws tsis tuaj yeem rov qab siv dua thaum nws tuaj yeem.
Yog li ntawd, qhov kev pib ntawm qhov pib ntawm alumina yog qhov tseem ceeb heev. Muaj ob hom kev kho tshiab rau kev siv lub alumina. Ib qho yog muab cov activated alumina tom qab koj ua rau txhuas sulfate txhuam rau 30 teev, thiab muab pov tseg cov kua thiab siv dej huv. Ntxuav 3 txog 5 zaug. Yog hais tias muaj ntau dhau heev lawm impurity nyob rau hauv cov tshuaj, nws tuaj yeem kho nrog 3% hydrochloric acid ib zaug thiab ces regenerated los ntawm tus qauv saum toj no.
Lwm txoj kev yog siv lub dilute nitric acid impregnation thiab calcination txoj kev los tsim dua tshiab. Tom qab nws tau ntxuav thiab qhuav khib nyiab tshuab alumina, qhov activated alumina yog muab tso rau hauv lub pas dej thiab soaked rau 8% -20% dilute nitric acid kua. Tom qab 5-25 feeb, lub impregnated activated alumina yog ntxuav nrog dej thiab qhuav. Cov khoom qhuav yog muab tso rau hauv ib qho hnyuv thiab txias txias rau chav sov kub tom qab kev kho calcination. Tus nquag alumina kho tau los ntawm txoj kev tau ua cov nqi qis thiab cov khoom ua tau zoo muaj kev tiv thaiv ib puag ncig zoo thiab nyiaj txiag.