Ceramic Membrane Tube

● Lub silicon carbide membrane yog tsim los ntawm cov txheej txheem recrystallization, nrog sintering kub ntawm 2400 degree . Thaum lub sij hawm sintering txheej txheem, lub caj dab sintering nruab nrab ntawm silicon carbide aggregates undergoes ib theem hloov ntawm cov khoom rau roj mus rau cov khoom, nrog ib tug qhib tus nqi ntawm ntau tshaj 45%. Cov tsim lim channel muaj kev sib txuas muaj zog, ua ke nrog lub hauv paus hydrophilicity ntawm cov khoom siv silicon carbide (lub kaum sab xis tsuas yog 0.3 degree), uas ua rau cov dej ntshiab ntws mus txog 3200LMH, thiab yog hydrophilic thiab oleophobic.

● Lub ntsiab lus isoelectric ntawm silicon carbide membrane yog nyob ib ncig ntawm pH 3, thiab lub ntsej muag ntawm daim nyias nyias tuaj yeem tswj tau qhov tsis zoo ntawm pH ntau yam, txhim kho nws cov pa phem.

● Cov tshuaj lom neeg ruaj khov zoo heev, muaj peev xwm ua haujlwm hauv qhov chaw huab cua (pH ntau yam 1-14); ntau yam kev npaj tu yuav tsim tau raws li cov yam ntxwv ntawm cov pa phem; Oxidants muaj lub siab ntev, nrog rau ozone thiab hydroxyl radicals.

★ High flux, 3-10 zaug piv rau cov organic membranes;

★ Me me hneev taw, txuag av;

★ Kev siv dej rov qab los yog txo qis dua 50%;

★ Cov tshuaj tiv thaiv kab mob, muaj peev xwm ua haujlwm hauv pH 0-14 ib puag ncig, acid thiab alkali resistant;

★ Lub neej kev pab cuam yog 2-10 lub sij hawm ntev dua cov organic membranes, txo nqi hloov;

★ Tso cai rau kev tu tshuaj nruj, ua kom yooj yim hauv kev tu, thiab cov flux yooj yim rov qab los tom qab ntxuav;

★ Qhov kev ua tau zoo yog yooj yim rov qab los tom qab muaj kuab paug thiab thaiv, tshem tawm cov nqi ntawm kev hloov daim nyias nyias los ntawm kev ua tsis tiav;

★ Cov txheej txheem ua ntej qis, txo tag nrho cov peev txheej thiab cov nqi khiav lag luam;

★ Kev kub siab sib txawv ntawm daim nyias nyias tau tso cai, yog li qhov kub thiab txias qhov dej ntws nce ntxiv;

★ Tsis muaj teeb meem membrane tawg, thiab kev tswj xyuas tsawg dua.

Ntxuav thiab concentration ntawm nano hmoov

Roj-dej sib cais (oilfield reinjection dej, kua tsim kev puas tsuaj rov tsim dua tshiab)

Cov khoom sib cais

Cov kua dej sib cais nrog cov ntsiab lus siab (mine dej, lom fermentation broth)

Cov kua dej sib cais nyob rau hauv ib puag ncig hnyav tshuaj (acid purification, nano hmoov catalyst rov qab)

Muaj pes tsawg tus neeg tau hnov ​​​​txog microplastics? Nws nyob txhua qhov chaw hauv peb lub neej. Nyob rau hauv xyoo tas los no, tib neeg tau ua ntau yam kev tshawb fawb txog microplastics. Lub npe hu ua microplastics yog cov yas me me, nrog qhov ntev ntawm 1μm mus rau 5mm. Muaj txawm tias nanoplastics, uas yog me dua microplastics, tsuas yog tsawg dua 1μm.

Piv nrog rau microplastics, nanoplastics yog qhov me me thiab feem ntau yuav mus los ntawm ntau cov ntaub so ntswg thiab cov kabmob hauv tib neeg lub cev. Lawv tuaj yeem dhau los ntawm cov teeb meem lom neeg (xws li cov ntaub so ntswg ntawm tes) thiab nkag mus rau hauv cov kab mob lom, nrog rau cov ntshav, lymphatic system, thiab txawm tias tag nrho lub cev, uas muaj kev phom sij ntau dua rau tib neeg kev noj qab haus huv.

Hauv lub neej, peb tuaj yeem hais tias "nyob ua ke nruab hnub thiab hmo ntuj" nrog microplastics. Cov khoom uas muaj nws yog dav heev. Tsuav nws yog ua los ntawm cov yas, nws yuav luag inevitable uas yuav muaj microplastics. Tsis tas li ntawd xwb, cov kab mob hauv hiav txwv xws li ntses thiab plhaub ntses kuj yuav kis tau los ntawm microplastics, uas yuav nkag mus rau peb lub cev los ntawm kev noj. Kev noj haus yog txoj hauv kev tseem ceeb rau tib neeg kom noj microplastics. Nws kwv yees tias txhua tus neeg noj li 5 grams ntawm microplastics ib lub lim tiam, uas yog sib npaug rau qhov hnyav ntawm daim npav rho nyiaj.

Tej zaum ntau tus neeg xav tias microplastics yog txawv teb chaws, thiab txawm tias lawv noj, lawv yuav tsum tau tawm ntawm cov quav!

Qee cov microplastics noj tiag tiag yuav raug tso tawm nrog cov quav, tab sis qee qhov tseem yuav muaj nyob hauv lwm yam kabmob thiab cov ntaub so ntswg ntawm peb lub cev.

Cov kev tshawb fawb tau pom tias muaj qhov nruab nrab ntawm 20 microplastic hais nyob rau hauv txhua 10 grams ntawm tib neeg quav. Thiab cov kws tshawb fawb tau ua tiav pom tias muaj cov microplastics hauv tib neeg cov kab mob hnyuv thiab txawm tias cov ntaub so ntswg placental.

Cov kws tshawb fawb los ntawm Free University of Amsterdam hauv Netherlands kuj tau pom muaj cov microplastics hauv tib neeg cov ntshav thawj zaug. Qhov no qhia tau hais tias microplastics yuav ntws los ntawm lub cev nrog cov ntshav thiab cuam tshuam rau ntau yam kabmob.

Tsis txhob kwv yees cov microplastics uas tau noj rau hauv lub cev. Lawv yuav cuam tshuam rau kev nqus ntawm micronutrients; ua kom cov tsos mob tsis xis nyob xws li raws plab, qhov quav los ntshav thiab mob plab; cov khoom yas kuj tseem yuav puncture thiab rub lub cev phab ntsa kom induce o. Tam sim no, tseem muaj ntau yam tsis paub txog qhov cuam tshuam ntawm microplastics rau tib neeg kev noj qab haus huv, uas xav tau kev tshawb nrhiav ntxiv.

Mohs hardness ntawm calcium carbonate (pob zeb diamond yog 10) yog 3, Mohs hardness ntawm calcium fluoride yog 4, thiab Mohs hardness ntawm silicate muaj feem xyuam rau cov dej ntsiab lus, xws li ntawm 4.5 mus rau 7.5. Silicate nplai yog qhov nyuaj tshaj plaws ntawm ntau hom nplai.

Thaum silicate scaling tshwm sim nyob rau hauv lub rov qab osmosis system, tus desalination tus nqi yuav poob sai sai, cov dej tso zis yuav poob sai, thiab lub system desalination tus nqi yuav poob ntau tom qab tshuaj ntxuav. Hauv kev ntsuas hnyav, qhov sib txawv ntawm qhov siab yuav nce sai, thiab txawm tias cov dej sib xyaw ua ke yuav ntws tawm.

SiO₂concentration nyob rau hauv lub influent dej ntawm rov qab osmosis yog txiav txim los ntawm lub siab tshaj plaws solubility thiab concentration ntau ntawm cov concentrated dej sab, thiab feem ntau yog 20ppm. Yam yuavtsum tau kawm uantej: Thaum muaj cov pa oxygen (DO) hauv dej<0.5mg/L and the pH is <6, the iron ion and aluminum ion are <0.05mg/L, because the iron and aluminum ion content has a greater impact on silicate scaling.

Silicon scaling feem ntau tshwm sim thaum txhuas lossis hlau nyob hauv dej. Hlau thiab txhuas reacts nrog silicon los tsim insoluble hlau silicates (aluminium silicate thiab hlau silicate), thiab cov tsim hlau silicates hloov lub solubility ntawm SiO2, yog li sai sai fouling lub membrane ntsiab.

Txawm hais tias silicon concentration hauv dej tsawg (10ppm), qhov concentration ntawm 50ppb ntawm txhuas yuav ua rau txo qis hauv kev ua haujlwm.

Yog tias muaj silicon, nws yuav tsum xyuas kom meej tias tsis muaj txhuas lossis hlau hauv dej, thiab nws raug nquahu kom siv 1μm kev ruaj ntseg lim caij, thiab siv cov tshuaj tiv thaiv acid ntxuav tib lub sijhawm.

Cov tshuaj ntxuav cov pa yog qhov pib tsis zoo tiv thaiv silicate nplai, thaum hydrofluoric acid tuaj yeem ntxuav silicate nplai. Txawm tias qhov kub thiab txias tsis tshua muaj siab, hydrofluoric acid muaj qhov zoo solubility rau silicate nplai.

Kev ntxuav tshuaj tuaj yeem ua tiav los ntawm kev sib xyaw {{0}}.1% HF + 0.4% HCl, lossis siv 0.1% NaF + 0.4% HCl.

Nco tseg:
(1) Lub concentration ntawm cov tshuaj ntxuav yuav tsum tau kho raws li qhov tseeb fouling qhov teeb meem. Nws raug nquahu kom txiav txim siab qhov kev tu kom tsim nyog tom qab kev sim ntxuav;

(2) Hydrofluoric acid yog corrosive heev. Kev nqus pa ntawm chav lossis kev sib cuag nrog daim tawv nqaij tuaj yeem ua rau kub hnyiab tsis tau. Nws kwv yees tias kev noj 1.5g ntawm hydrofluoric acid tuaj yeem ua rau tuag taus. Kev nqus pa ntawm qhov siab ntawm hydrofluoric acid pos huab tuaj yeem ua rau mob ntsws ntsws thiab hemorrhagic pulmonary edema. Nws kuj tuaj yeem nqus tau los ntawm daim tawv nqaij thiab ua rau muaj kev lom lom heev. Yog li ntawd, kev tiv thaiv kev tiv thaiv yuav tsum tau ua thaum lub sij hawm tshuaj ntxuav thiab kev ua haujlwm yuav tsum tau ua los ntawm cov kws tshaj lij.

(1) Kev tswj cov SiO2 concentration nyob rau hauv lub influent thiab tus nqi rov qab ntawm lub rov qab osmosis system kom txo tau cov SiO2 concentration nyob rau hauv cov concentrate thiab tsis txhob tshaj cov solubility khoom yog lub ntsiab txoj kev los tiv thaiv SiO2 scaling;

(2) Txhim kho lossis ntxiv dag zog rau cov txheej txheem ua ntej, xws li siv cov txiv qaub softening, tuaj yeem txo 50% ntawm SiO2 hauv cov dej pub, los yog ntxiv magnesium oxide los yog sodium aluminate thaum lub sij hawm txiv qaub-soda softening pretreatment kom txo cov SiO2 concentration nyob rau hauv lub influent;

(3) Ua kom cov dej kub kom zoo (tsis pub tshaj 40 degree) tuaj yeem pab ua kom cov solubility ntawm SiO2 thiab txo qis silicate scaling;

(4) Ua kom cov pH ntawm cov neeg muaj peev xwm ua tau zoo tuaj yeem pab ua kom cov solubility ntawm SiO2 thiab txo qis silicate scaling;

(5) Pretreatment nrog scale inhibitor dispersant uas yog tsom ntawm silica scaling. Qhov siab tshaj plaws tso cai SiO2 concentration ntawm cov concentrate sab ntawm txawv nplai inhibitor dispersants txawv. Thov sab laj nrog lub chaw tsim khoom scale inhibitor kom paub meej;

(6) Colloidal silica tuaj yeem raug tshem tawm los ntawm adsorption siv lub zog alkaline anion txauv resin lossis los ntawm kev siv ultrafiltration membrane nrog txiav tawm qhov hnyav ntawm molecular tsawg dua 10, 000.

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