Taw qhia: Tsav los ntawm ob lub hom phiaj carbon emissions thiab nruj ib puag ncig cov cai, kev kho cov dej khib nyiab thiab cov khoom siv rov qab siv dua hauv cov thee gasification thiab thee chemical industries tau ntev txij li hloov los ntawm "yeem" mus rau "yuav tsum tau" qhov teeb meem.
Coal chemical wastewater yog complex -muaj cov qib siab COD, ammonia nitrogen, tag nrho nitrogen, cyanide, phenols, thiab lwm yam pa phem recalcitrant. Qhov zoo ntawm cov dej khib nyiab kho tau hloov pauv ntau tom qab kev kho mob lom. Cov txheej txheem "multi-media filtration + organic ultrafiltration" cov txheej txheem raug kev txom nyem los ntawm cov dej ntws tsawg, yooj yim fiber ntau tawg, nquag tu, thiab lub neej luv luv, ua rau nws nyuaj rau kev ua kom tau raws li qhov yuav tsum tau siv dua. Puas muaj lub tshuab ua kom yooj yim pretreatment, tiv taus cov dej zoo hloov pauv, ua haujlwm ruaj khov nrog cov flux siab, thiab tswj nws cov kev ua tau zoo nyob rau lub sijhawm ntev?
Cov lus teb yog: ceramic ultrafiltration membranes.
Cov ntaub ntawv pov thawj tias ceramics ultrafiltration membranes tuaj yeem ua haujlwm ruaj khov ntawm qhov siab ntawm 150-180 LMH yam tsis muaj cov ntxaij lim dej ntau, nrog CEB lub voj voog ntau dua 12 teev thiab CIP voj voog ntau dua 1 lub hlis. Lub flux yog 3-4 npaug ntawm cov tsoos organic daim nyias nyias, ua rau nws arguably "qhov kawg tov" rau cov dej khib nyiab rov qab siv rau hauv kev lag luam thee.
I. Rov siv cov dej khib nyiab hauv Coal Chemical Industry: Peb Qhov Kev Mob Tsis Taus
Kev kho cov dej khib nyiab pov tseg feem ntau ua raws li txoj hauv kev "homogenization → kev kho mob lom → sib sib zog nqus pom → rov siv dua." Thaum cov khoom siv roj ntsha (hloov kho SBRs) tuaj yeem txo qis COD thiab ammonia nitrogen, cov effluent tseem raug kev txom nyem los ntawm kev hloov pauv loj hauv turbidity, residual suspended solids (SS), thiab nkag tau yooj yim ntawm cov organic teeb meem. Kev qhia ncaj qha rov qab osmosis yuav ua rau cov membrane fouling, nquag tu, thiab luv lifespan.
Cov txheej txheem kev kho dej khib nyiab tshaj plaws siv ntau- cov lim dej tawm + cov organic hollow fiber ultrafiltration, uas qhia txog peb qhov tsis zoo hauv kev ua haujlwm tiag tiag:
* ** Kev kho kom yooj yim thiab hneev taw loj:** Yuav tsum muaj ntau- media filtration thiab activated carbon filtration, ua rau cov txheej txheem ntev, kev nqis peev siab, thiab kev saib xyuas cumbersome.
* ** Organic daim nyias nyias muaj feem cuam tshuam rau fiber ntau tawg thiab nkag mus rau hauv dej: ** cov ntaub ntawv yas fibers muaj lub zog tsawg thiab yooj yim tawg, ua rau SS (suspended solids) thiab turbidity nkag mus, kis kab mob RO tom qab.
* ** Tsawg flux thiab nquag tu: ** Kev khiav hauj lwm flux tsuas yog 50-60 LMH, CEB tu yuav tsum tau txhua txhua 1-2 teev, thiab CIP tu txhua 1-2 lub lis piam, ua rau lub sij hawm ntev downtime thiab siab tu nqi.
Cov ntsiab lus mob tseem ceeb ntawm kev kho dej khib nyiab hauv kev lag luam thee chemical yog: kev hloov pauv loj hauv dej zoo (COD 50-150 mg / L, turbidity 2-10 NTU), complex pollutant muaj pes tsawg leeg, thiab qhov yuav tsum tau siv rau lub sij hawm ntev ruaj khov, uas cov txheej txheem ib txwm tsis tuaj yeem tiv taus.
II. Ceramic Ultrafiltration Membranes: Vim Li Cas Lawv Ua Haujlwm Zoo Tshaj Plaws Organic Membranes?
Ceramic ultrafiltration membranes yog sintered los ntawm -alumina ntawm qhov kub thiab txias, inherently muaj "hardcore zog." Muab piv rau cov organic ultrafiltration membranes, lawv muaj qhov zoo ntawm kev hloov pauv: cov khoom siv ceramic yog qhov ruaj khov dua, muaj zog dua, muaj zog dua, thiab yooj yim los tswj, zoo kawg nkaus haum rau qhov hnyav ntawm cov dej khib nyiab.
III. Pilot-Size Core Results: Cov ntaub ntawv hais lus rau nws tus kheej
(1) Siab -flux ruaj khov ua haujlwm
Ceramic ultrafiltration membrane ua haujlwm ruaj khov ntawm qhov flux ntawm 157 LMH, ncav cuag qhov siab tshaj plaws ntawm 180 LMH, uas yog 3-4 npaug ntawm cov khoom siv ib txwm muaj (50-60 LMH). Rau tib lub ntim dej kho mob, tus naj npawb ntawm cov membrane modules raug txo los ntawm 75%, txo qis kev nqis peev hauv khib nyiab.
(2) Ultra-Ntev Lub Sij Hawm Ntxuav
CEB (Online Chemical Cleaning) cycle: >12 teev / voj voog (organic membranes 1-2 teev / voj voog);
CIP (Offline Chemical Cleaning) cycle: >1 lub hlis (organic membranes 1-2 lub lis piam / voj voog);
Kev tu tus nqi rov qab: ze rau 100%, uas tsis muaj degradation hauv daim nyias nyias.
(3) Kev ruaj khov Permeate dej zoo heev
Permeate turbidity:<0.04 NTU;
Permeate SDI:<2;
Ua tau raws li qhov yuav tsum tau ua rau rov qab osmosis pub dej thiab tuaj yeem siv ncaj qha rau hauv cov dej ntws thiab cov tshuab desalination.
(4) Kev tiv thaiv zoo rau cov dej tsis zoo
Txawm hais tias siab - zaus thiab qhov hloov pauv tseem ceeb hauv cov dej pub COD thiab turbidity, cov dej permeate zoo ntawm cov ceramic membrane tseem nyob ruaj khov tsis muaj kev pheej hmoo ntawm kev nkag mus, daws qhov mob ntawm kev lag luam ntawm cov organic membranes qhov twg "kev hloov pauv hauv cov dej zoo ua rau cov qauv dej ntau dhau."
IV. Engineering Tus Nqi: Qhov Zoo Tshaj Plaws rau Kev Siv Hluav Taws Xob Hluav Taws Xob Hluav Taws Xob
Qhov kev sim ntsuas no tau ua kom pom tseeb txog kev tsim vaj tsev ua tau zoo ntawm ceramic ultrafiltration membranes rau cov thee tshuaj khib nyiab rov siv dua, nqa plaub qhov tseem ceeb:
1. Cov txheej txheem yooj yim heev ntws thiab txo kev nqis peev tsawg
Kev tshem tawm cov khoom siv ua ntej xws li clarifiers, ntau- cov ntxaij lim dej tawm, thiab cov pa roj carbon lim dej ua kom luv cov txheej txheem ntws los ntawm 60%, txo qhov chaw hauv pem teb los ntawm 50%, thiab txo cov kev tsim vaj tsev thiab cov cuab yeej siv peev ntau dua 30%. 2. Txo cov nqi khiav lag luam thiab tu, txuag sij hawm thiab kev siv zog.
Membrane lifespan ncua los ntawm 2-5 zaug, txhua xyoo hloov cov nqi txo los ntawm 80%;
Kev tu lub voj voog txuas ntxiv los ntawm ntau dua 10 zaug, lub sijhawm poob qis los ntawm 90%;
Tsis xav tau kev hloov pauv cov lim dej ntau zaus lossis kev kho cov cuab yeej ua ntej, cov nqi ua haujlwm raug txo los ntawm 50%.
3. Ua kom rov siv dua tus nqi, dej thiab carbon txo
Cov dej rov qab los ntawm qhov system tau nce ntau dua 2%, kev siv dej tshiab txo qis, cov dej khib nyiab txo qis, ua tib zoo ua raws li kev lag luam thee chemical txoj cai ntawm "kev txuag dej, kev txo qis, thiab kev siv cov peev txheej."
4. Kev tiv thaiv ntawm cov kab mob membrane tom ntej, ncua kev ua neej ntev
Tsis tshua muaj turbidity thiab SDI nyob rau hauv cov dej tsim, tsis muaj kab mob nkag mus, thim rov qab osmosis / nanofiltration membrane tu zaus txo los ntawm 70%, lifespan ncua los ntawm 3-5 xyoo, ntxiv txo nqi khiav hauj lwm.
V. Conclusion: Ceramic Membranes Yuav Reshape the Coal Chemical Wastewater Treatment Landscape
Kev lag luam thee chemical wastewater kho kev lag luam yog ushering nyob rau hauv ib tug thev naus laus zis kiv puag ncig uas ceramic membranes hloov cov organic membranes.
Cov ntaub ntawv pov thawj tias ceramic ultrafiltration daim nyias nyias tuaj yeem kho cov dej khib nyiab ncaj qha los ntawm cov txheej txheem thee thiab biochemical, tshem tawm qhov xav tau rau ntau -kev kho dua tshiab. Lawv muab cov kev ua haujlwm siab, lub sijhawm ua haujlwm ntev, tsis kam mus rau qhov hloov pauv, thiab kev yooj yim ntawm kev ua haujlwm thiab kev saib xyuas, ua kom zoo dua cov txheej txheem organic ultrafiltration hauv txhua yam.
Rau cov lag luam thee chemical xws li thee gasification, hluavtaws ammonia, methanol, thiab coking nroj tsuag:
Cov dej num tshiab: Ncaj qha siv cov tshuab ceramic ultrafiltration ua tiav cov dej khib nyiab rov qab siv hauv ib kauj ruam;
Txhim kho cov haujlwm: Hloov cov organic ultrafiltration nrog ntau- media filtration sai txhim kho cov qauv thiab kev ua haujlwm zoo.
Ceramic ultrafiltration membranes tsis yog ib qho "nyiaj tshwj xeeb" rau kev kho cov dej khib nyiab, tab sis yog ib qho kev xaiv tseem ceeb rau kev ua tiav cov txheej txheem rov siv dua, txo nqi, thiab txhim kho kev ua haujlwm!