Hauv cov ntawv nyeem dhau los, peb tau piav qhia txog cov txheej txheem fouling thiab qhov sib txawv ntawm PAM ntawm cov ntaub so ntswg inorganic. Ntawm ntau qhov xwm txheej ntawm kev lag luam, roj thiab roj av ua dej (nrog rau cov dej ntws tawm polymer ua dej thiab cov kua dej ntws rov qab) yog cov dej tsis zoo nrog rau qhov tseem ceeb tshaj plaws PAM membrane fouling thiab qhov nyuaj tshaj plaws hauv kev kho mob.
I. Native PAM: Ib qho chaw tshwj xeeb ntawm kev sib kis hauv qhov chaw oilfield
Tsis zoo li PAM siv rau kev kho dej flocculation, PAM feem ntau yog siv los ua tus neeg sawv cev ntawm cov roj, cov kua dej ntxiv, cov dej kaw -tawm tus neeg sawv cev, thiab cov dej txias txias, txhaj rau hauv cov dej hauv cov roj. Hom PAM no hydrolyzes thiab degrades nyob rau hauv qhov kub thiab txias ntawm qhov tsim, dispersing uniformly nyob rau hauv dej nyob rau hauv ib tug yaj lub xeev, yog li cuam tshuam nrog lub membrane system nyob rau hauv ob txoj kev:
Txo cov pem hauv ntej- kawg kev kho mob: Hydrolyzed PAM disperses cov roj crude thiab tshem tawm cov khib nyiab hauv dej, ua rau nws nyuaj rau cov roj tee thiab cov khoom kom zoo sib cais los ntawm coagulation thiab sedimentation, indirect ua rau lub fouling load ntawm lub membrane unit;
Qhov no ncaj qha ua rau qhov tob tob: PAM molecules nyob rau tib qhov kev txiav txim ntawm qhov loj me me me me pore loj, tso cai rau lawv nkag mus rau cov pa ua ntej ua ntej. Thaum nyob rau hauv lub membrane raws, lawv ua entangled thiab solidified, tsim irreversible sib sib zog nqus blockage. Qhov no yog qhov laj thawj tseem ceeb vim li cas, txawm tias thaum cov roj thiab turbidity ua tau raws li cov qauv, cov dej ntws mus txuas ntxiv mus.
Daim duab - Schematic daim duab ntawm lub microscopic mechanism uas PAM exacerbates membrane fouling
Tau qhov twg los: "Daim ntawv thov ntawm ceramics nyob rau hauv kev kho mob ntawm oilfield- cov dej ua: Cov teebmeem ntawm polyacrylamide thiab inorganic ntsev"
Meanwhile, oilfield reinjection dej feem ntau muaj cov yam ntxwv ntawm siab hardness thiab siab mineralization. Inorganic ntsev ions compress lub hydration txheej ntawm PAM molecules, hloov cov molecular saw conformation, ua rau lawv yooj yim mus khaws cia rau ntawm daim nyias nyias thiab tsim ib tug denser fouling txheej; Nyob rau tib lub sijhawm, cov pab pawg nquag ntawm PAM complex calcium thiab magnesium ions, txhawb kev tsim cov organic-inorganic complex scale, txhim khu kev ruaj ntseg ntawm fouling txheej, thiab txo cov kev ua tau zoo ntawm pa acid thiab alkali ntxuav.
Daim duab - Cov nyhuv ntawm inorganic ntsev concentration ntawm flux poob ntawm PAM-cov kab mob uas tsis muaj kab mob
Tau qhov twg los: "Daim ntawv thov ntawm ceramics nyob rau hauv kev kho mob ntawm oilfield- cov dej ua: Cov teebmeem ntawm polyacrylamide thiab inorganic ntsev"
II.Qhov zoo ntawm Silicon Carbide Ceramic Films nyob rau hauv Adapting mus rau ntau yam scenarios
Yav dhau los, peb tau qhia txog daim ntawv thov ntawm silicon carbide ceramic membrane ua ke tshuab hauv oilfield reinjection dej tshuab.[kawm ntxiv]Rau cov yam ntxwv ntawm cov dej uas muaj salinity siab thiab cov ntsiab lus polymer, silicon carbide ceramic membranes muab superior adaptability rau ntau yam kev khiav hauj lwm tej yam kev mob piv rau zoo tib yam inorganic daim nyias nyias.
Muaj zog corrosion kuj: Cov tshuaj lom neeg ruaj khov zoo heev, tuaj yeem tiv taus ntau yam pH thiab siab ntsev corrosion ib puag ncig, thiab tsis muaj kev pheej hmoo ntawm cov khoom siv corrosion thaum lub sij hawm ntev - ua haujlwm hauv cov dej tsis zoo, ua rau nws haum rau kev ua haujlwm hnyav hauv cov roj av.
Cov txheej txheem kho kom zoo: kev tu niaj hnub tuaj yeem siv 60℃kub alkaline tov nrog EDTA ncig tu kom decompose PAM gel thiab chelate scale ions, uas tuaj yeem rov qab 90% ntawm cov flux; nyob rau hauv cov ntaub ntawv ntawm fouling loj heev, nws yuav tsum regenerated los ntawm high -kub calcination kom tag decompose lub solidified PAM nyob rau hauv daim nyias nyias pores, rov ua hauj lwm ntawm lub membrane caij, thiab ncua nws lifespan.
Nws yog ib qho tseem ceeb kom paub meej tias kev ntxuav thiab rov tsim dua tshiab yog ob qho tib si kho. Txhim kho cov txheej txheem pretreatment thiab txo PAM load ntawm cov dej yog cov hauv paus ntsiab lus los xyuas kom meej lub sijhawm ntev - lub sijhawm ua haujlwm ruaj khov ntawm qhov system.
Cov ntsiab lusy
Qhov kev sib tw tseem ceeb hauv kev khiav hauj lwm hauv cov ntaub ntawv tsis muaj kab mob rau cov roj av ua dej nyob hauv qhov tsis tu ncua, tob - zaum fouling tshwm sim los ntawm yaj hydrolysis ntawm phosphoric acid (PAM). Nws qhov kev cuam tshuam tsis zoo ntawm daim nyias nyias tawm deb tshaj li cov roj crude thiab tshem tawm cov khib nyiab, thiab nws ua ke nrog cov dej salinized heev los ua nyuaj dua - rau - tswj txoj kev fouling. Silicon carbide ceramic membranes, nrog rau lawv muaj zog corrosion kuj thiab siab -kub regeneration muaj peev xwm, yog zoo suited rau cov complex dej zoo sib sib zog nqus kev kho mob scenarios. Txawm li cas los xij, membrane fouling tswj tseem yuav tsum tau ua raws li lub hauv paus ntsiab lus ntawm "qhov chaw tswj raws li thawj txoj hauv kev, kawg- ntawm- yeeb nkab kho raws li kev ntxiv," sib txuas rau pem hauv ntej- kawg load txo nrog cov qauv kev ua haujlwm thiab kev saib xyuas kom ua tiav ntev - lub sijhawm ua haujlwm ruaj khov.
Peb zoo siab tos txais cov kws tshaj lij hauv kev lag luam kho dej los sib pauv kev paub txog kev tswj xyuas cov membrane fouling thiab kev lag luam engineering.
Rau kev sab laj thiab kev daws teeb meem ntsig txog silicon carbide ceramic membranes, thov koj xav tiv tauj peb ntawm cov lus ntiag tug.
Peb lub tuam txhab niaj hnub nrhiav neeg ua haujlwm rau cov haujlwm muaj feem xyuam, thiab peb txais tos cov ntawv thov los ntawm cov kws tshaj lij kev lag luam.