Silicon Carbide Ceramic Flat Sheet Membrane yog tsim los ntawm sintering high-purity silicon carbide hmoov ntawm qhov kub thiab txias, thiab tam sim no yog cov khoom siv membrane nrog qhov zoo tshaj plaws hydrophilicity thiab muaj peev xwm tiv thaiv kev ua qias tuaj.
• Lub membrane nto nrog cov nqi tsis zoo tuaj yeem ua kom muaj kuab paug zoo nyob thoob plaws ntau qhov pH;
• Cov kev ua haujlwm zoo tshaj plaws - thaum PAC ntxiv ua rau pH tsawg dua 6, daim nyias nyias muaj peev xwm tswj tau qhov tsis zoo ntawm -25 ~ -30 millivolts, ua rau nws nyuaj rau soluble organic carbon thiab pob tshab exopolymer hais rau ua raws li daim nyias nyias;
• Nws yog ib qho yooj yim kom tshem tawm cov khoom tsis zoo hauv dej los ntawm Silicon Carbide Ceramic Flat Sheet Membrane nto, xws li cov kab mob, algae, MLSS, pob tshab exopolymer hais, thiab cov khoom roj.
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Siab Zoo
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Siab Flux
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Corrosion Resistant
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Me Hneev taw
Cov teeb meem tshwm sim hauv kev khiav dej num
Thaum lub sijhawm ua haujlwm ntawm cov dej txias txias, cov dej ntws tsis tu ncua vim dej evaporation thiab cua poob, thiab cov ntsev cov ntsiab lus tshaj tus qauv, anions thiab cations nce, thiab pH tus nqi hloov pauv, ua rau cov dej tsis zoo. . Qhov kub, pH tus nqi thiab cov as-ham ntawm cov dej ntws yog qhov tsim nyog rau kev tsim cov kab mob me me, thiab lub hnub ci txaus ntawm cov cua txias yog qhov chaw zoo rau kev loj hlob ntawm algae. Thiab kev tswj scaling, corrosion tswj, microbial tswj, thiab lwm yam, inevitably yuav tsum tau circulating dej kho.
Scale
Vim lub evaporation tsis tu ncua ntawm circulating dej thaum lub sij hawm txias txheej txheem, cov ntsev concentration nyob rau hauv cov dej txuas ntxiv mus, tshaj cov solubility ntawm tej ntsev thiab precipitating. Cov nplais muaj xws li calcium carbonate, calcium phosphate, magnesium silicate, thiab lwm yam. Qhov kev ntxhib los mos ntawm nplai yog qhov ntom ntom, uas ua rau txo cov cua sov ua haujlwm. Qhov ntsuas thickness ntawm 0.6 hli txo qhov kub hloov coefficient los ntawm 20%.
Corrosion
Lub corrosion ntawm circulating dej rau cov khoom siv hluav taws xob pauv yog feem ntau electrochemical corrosion. Qhov ua rau muaj xws li kev tsim khoom tsis raug, cov pa oxygen txaus hauv dej, corrosive ions hauv dej (Cl-, Fe2+, Cu2+) thiab cov av tsim los ntawm cov mucus secreted los ntawm cov kab mob. Cov txiaj ntsig ntawm corrosion yog qhov hnyav heev. Yog tias nws tsis tswj tau, cov khoom siv hluav taws xob thiab cov kav dej yuav raug muab pov tseg hauv lub sijhawm luv luv.
Microbial slime
Vim tias cov dej ntws muaj cov pa oxygen txaus, qhov kub thiab txias thiab eutrophic, nws yog qhov tsim nyog rau kev loj hlob thiab kev loj hlob ntawm cov kab mob. Yog tias nws tsis tswj tau raws sijhawm, nws yuav ua rau dej tsis zoo, tsw ntxhiab, blackening, ntau cov slime deposition thiab txawm blockage ntawm lub txias ntauwd, ib tug tseem ceeb txo nyob rau hauv txias thiab kub dissipation nyhuv, thiab aggravated khoom corrosion. Yog li ntawd, kev yug me nyuam ntawm cov kab mob yuav tsum tau tswj nyob rau hauv circulating dej kho.
Cov kab mob microbial
Cov kab mob hauv cov dej txias txias tuaj ntawm ob yam. Ua ntej, cov cua txias ntauwd yuav tsum tau ua kom muaj huab cua ntau thaum lub sij hawm evaporation ntawm cov dej, thiab cov kab mob kuj tau coj mus rau hauv cov dej txias nrog cov huab cua. Qhov thib ob, cov dej ntxiv ntawm cov dej txias yuav muaj ntau dua lossis tsawg dua cov kab mob, thiab cov kab mob no kuj nkag mus rau hauv cov dej txias nrog cov dej ntxiv.
Nyob rau hauv irradiation ntawm tshav ntuj, algae yuav photosynthesize nrog carbon dioxide, bicarbonate thiab lwm yam carbon qhov chaw nyob rau hauv dej, nqus carbon raws li kev noj haus thiab tso pa oxygen. Yog li ntawd, thaum algae ntau ntau, cov ntsiab lus oxygen yaj hauv dej yuav nce ntxiv, uas yog qhov zoo rau kev depolarization ntawm oxygen, thiab cov txheej txheem corrosion yuav nrawm dua.
Kev loj hlob ntawm cov kab mob loj hauv cov dej ntws yuav ua rau cov dej ntws tawm dub, tsim cov ntxhiab tsw phem, thiab ua paug rau ib puag ncig. Nyob rau tib lub sijhawm, ntau cov sludge yuav raug tsim los txo qhov kev ua haujlwm txias ntawm cov cua txias ntauwd thiab ua rau cov ntoo tsis zoo thiab rot.
Cov sludge yog tso rau hauv lub tshav kub exchanger, uas txo cov tshav kub hloov efficiency thiab ua rau kom lub taub hau poob. Cov sludge tso rau ntawm qhov chaw hlau yuav ua rau muaj kev cuam tshuam loj heev. Nyob rau tib lub sijhawm, nws tseem cais cov nyhuv ntawm corrosion thiab scale inhibitors ntawm cov hlau, yog li cov neeg ua haujlwm tsis tuaj yeem ua si lawv cov kev ua haujlwm corrosion thiab scale inhibition.
Ntxiv nrog rau kev ua kom qis qis qis, qee cov kab mob zais cov tshuaj uas ncaj qha corrode hlau thaum lub sij hawm metabolism. Tag nrho cov teeb meem no ua rau lub cev tsis muaj peev xwm ntawm cov dej ntws mus ua haujlwm zoo rau lub sijhawm ntev, cuam tshuam rau kev tsim khoom thiab ua rau muaj kev puas tsuaj loj. Yog li ntawd, qhov kev puas tsuaj ntawm cov kab mob yog qhov loj npaum li qhov kev puas tsuaj ntawm nplai thiab corrosion rau cov dej txias. Nws tuaj yeem hais tau tias kev tswj hwm kev puas tsuaj ntawm cov kab mob yog qhov tseem ceeb tshaj plaws.
Tsim cov nplai
Nyob rau hauv lub circulating dej system, nplai yog tsim los ntawm supersaturated dej-soluble Cheebtsam. Ntau cov ntsev xws li bicarbonate, carbonate, chloride, silicate, thiab lwm yam yog yaj hauv dej. Ntawm lawv, yaj bicarbonate xws li Ca (HCO3)2 thiab Mg (HCO3)2 yog qhov tsis ruaj khov tshaj plaws thiab yooj yim heev rau decompose rau hauv carbonate. Yog li ntawd, thaum muaj ntau cov bicarbonates yaj nyob rau hauv cov dej txias, cov dej yuav decompose thaum dhau los ntawm lub tshav kub exchanger, tshwj xeeb tshaj yog cov nto nrog kub dua;
Thaum phosphate thiab calcium ions yaj hauv dej, calcium phosphate nag lossis daus kuj yuav raug tsim;
Calcium carbonate thiab Ca3 (PO4) 2 yog ob qho tib si nyuaj rau yaj thiab txawv ntawm cov ntsev dav dav. Lawv solubility tsis nce nrog qhov nce ntawm qhov kub thiab txias, tab sis txo qis nrog qhov nce ntawm qhov kub thiab txias.
Yog li ntawd, nyob rau ntawm lub tshav kub hloov chaw ntawm lub tshav kub exchanger, cov insoluble ntsev tau yooj yim mus txog ib tug oversaturated lub xeev thiab crystallize nyob rau hauv dej. Tshwj xeeb tshaj yog thaum cov dej ntws qis qis los yog qhov chaw hloov hluav taws xob yog qhov ntxhib, cov crystalline precipitates yuav muab tso rau ntawm lub tshav kub hloov mus rau qhov uas feem ntau hu ua nplai. Vim tias cov nplais pob zeb no tuab thiab tawv, lawv kuj hu ua hard scale. Cov nplais feem ntau yog: calcium carbonate, calcium sulfate, calcium phosphate, magnesium ntsev, silicate.
Concentration ntau
Lub circulating dej concentration ntau yog hais txog qhov sib piv ntawm cov dej circulating mus tas li concentrated vim dej evaporation, cua poob, thiab lwm yam thaum lub sij hawm ua hauj lwm ntawm lub circulating dej system (piv nrog cov dej ntxiv raws li ib tug benchmark). Nws yog ib qho tseem ceeb qhia txog kev ntsuas qhov zoo ntawm kev tswj dej.
Yog tias qhov concentration ntau tsawg, kev siv dej thiab cov dej phwj tuaj yog loj, thiab kev ua haujlwm ntawm tus neeg saib xyuas dej tsis tuaj yeem siv tag nrho; Yog tias qhov concentration ntau yog siab, cov dej ntim tuaj yeem txo tau thiab cov nqi kho dej tuaj yeem txuag tau; Tab sis yog tias qhov concentration ntau dhau lawm, qhov kev xav ntawm cov dej yuav nce ntxiv, qhov nyuaj ntawm kev tswj kev ntsuas thiab kev tiv thaiv corrosion yuav nce, tus neeg saib xyuas dej yuav ua tsis tiav, thiab nws tsis tsim nyog rau kev tswj cov kab mob. Yog li ntawd, qhov concentration ntau ntawm cov dej ntws yuav tsum muaj qhov ntsuas tsim nyog.
Kev txav ntawm cov kab mob hauv cov dej ntws tuaj yeem ntsuas tau los ntawm cov khoom tshuaj ntsuam xyuas hauv qab no:
Residual chlorine (dawb chlorine)
Thaum ntxiv cov tshuaj chlorine rau kom tsis muaj menyuam, ua tib zoo saib xyuas lub sijhawm thiab cov tshuaj chlorine seem, vim tias thaum cov kab mob sib kis loj heev, cov tshuaj chlorine noj hauv cov dej yuav nce ntxiv.
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Ammonia
Cov dej ntws feem ntau tsis muaj ammonia, tab sis ammonia tuaj yeem tshwm sim hauv dej vim tias cov txheej txheem xau los yog nqus tau ammonia hauv huab cua. Lub sijhawm no, peb yuav tsum tsis txhob maj maj. Ntxiv nrog rau nquag nrhiav cov ntsiab lus ammonia to, peb yuav tsum tau saib xyuas seb cov dej puas muaj nitrite. Cov ntsiab lus ammonia hauv dej yog qhov zoo tshaj plaws tswj hauv qab 10mg / L.
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TSIS MUAJ 2-
Thaum ammonia thiab nitrite tshwm hauv dej, nws txhais tau tias cov kab mob nitrite hauv dej tau hloov ammonia mus rau nitrite. Lub sijhawm no, chlorination ntawm cov dej ntws yuav nyuaj heev, kev siv tshuaj chlorine yuav nce ntxiv, thiab cov tshuaj chlorine seem yuav nyuaj kom ncav cuag lub hom phiaj. NO2- cov ntsiab lus hauv dej yog tswj tau zoo tshaj 1mg/L.
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Tshuaj lom neeg xav tau oxygen
Thaum cov kab mob hauv dej ntau zuj zus, COD yuav nce ntxiv, vim tias cov hnoos qeev zais los ntawm cov kab mob ua rau cov ntsiab lus ntawm cov organic hauv dej. Yog li ntawd, los ntawm kev soj ntsuam ntawm cov tshuaj oxygen xav tau, cov qauv ntawm microbial hloov hauv dej tuaj yeem pom. Raws li ib txwm muaj, COD hauv dej yuav tsum tsawg dua 150 mg / L.
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Peb Cov Haujlwm
Kev kho dej ntawm kuv
High Standard Kais Dej Purification
Seawater Desalination Pretreatment
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