1. Kangani iyo reverse osmosis system inofanira kucheneswa?
Kazhinji, kana iyo yakajairwa flux inodzikira ne10-15%, kana desalination mwero weiyo system inodzikira ne10-15%, kana kudzvanywa kwekushanda uye mutsauko pakati pezvikamu uchiwedzera ne10-15%, iyo RO system inofanirwa kucheneswa. . Iyo yekuchenesa frequency yakanangana neiyo dhigirii rekutanga system. Apo SDI15<3, nguva yekuchenesa inogona kuva 4 nguva pagore; Kana SDI15 yakatenderedza 5, iyo frequency yekuchenesa inogona kupetwa kaviri, asi iyo frequency yekuchenesa inoenderana nemamiriro chaiwo ega rega reprojekiti.
2. Chii chinonzi SDI?
Parizvino, tekinoroji yakanakisa yekuongorora kunoshanda kwekusvibiswa kwecolloid mukupinda kweRO/NF system ndeyekuyera iyo sedimentation density index (SDI, inozivikanwawo seyekusvibisa blockage index) yekupinda, iyo inokosha parameter inofanirwa. tsunga pamberi peRO dhizaini. Munguva yekushanda kweRO / NF, inofanira kuyerwa nguva dzose (yemvura yepamusoro, inoyerwa 2-3 nguva pazuva). ASTM D4189-82 inotsanangura chiyero chebvunzo iyi. Mvura inopinza ye membrane system inotsanangurwa se SDI15 kukosha kunofanira kuva ≤ 5. Inoshanda michina yekuderedza SDI pretreatment inosanganisira multi-media filter, ultrafiltration, microfiltration, nezvimwewo. .
3. Kazhinji, reverse osmosis process kana ion exchange process inofanira kushandiswa pamvura inopinza?
Mumamiriro ezvinhu akawanda ane simba, kushandiswa kweion exchange resin kana reverse osmosis kunogoneka nehunyanzvi, uye kusarudzwa kwemaitiro kunofanirwa kutariswa nekuenzanisa kwehupfumi. Kazhinji, kukwirisa munyu, kunowedzera hupfumi kudzoreredza osmosis, uye kuderera kwemunyu, ndiko kuwedzera hupfumi hwekuchinjana kweion. Nekuda kwekufarirwa kwereverse osmosis tekinoroji, iyo musanganiswa maitiro e reverse osmosis + ion kuchinjana maitiro kana akawanda-nhanho reverse osmosis kana reverse osmosis + mamwe akadzika desalination matekinoroji yave inozivikanwa tekinoroji uye hupfumi inonzwisisika nzira yekurapa mvura. Kuti uwane rumwe ruzivo, ndapota bvunza mumiriri weWater Treatment Engineering Company.
4. Makore mangani anogona kudzoreredza osmosis membrane zvinhu zvinogona kushandiswa?
Hupenyu hwesevhisi hwe membrane hunoenderana nekugadzikana kwekemikari ye membrane, kugadzikana kwemuviri kwechinhu, kucheneswa, chitubu chemvura yekupinza, pretreatment, frequency yekuchenesa, chiyero chekutungamira kwekushanda, nezvimwewo Zvinoenderana nekuongorora kwehupfumi , kazhinji inopfuura makore mashanu.
5. Ndeupi musiyano pakati pe reverse osmosis uye nanofiltration?
Nanofiltration ndeye membrane mvura yekuparadzanisa tekinoroji pakati reverse osmosis uye ultrafiltration. Reverse osmosis inogona kubvisa diki solute ine huremu hwema molecular isingasviki 0.0001 μ m. Nanofiltration inogona kubvisa solutes nehuremu hwemamorekuru hunosvika 0.001 μ m. Nanofiltration imhando yemhando yepasi yekumanikidza reverse osmosis, iyo inoshandiswa mumamiriro ezvinhu apo kuchena kwemvura inogadzirwa mushure mekurapwa hakuna kunyanya kuomarara. Nanofiltration yakakodzera kurapa zvakanaka mvura uye pamusoro pemvura. Nanofiltration inoshanda kune mvura yekurapa masisitimu ane yakakwira desalination mwero izvo zvisina kufanira senge reverse osmosis. Zvisinei, ine simba guru rekubvisa zvikamu zvekuoma, dzimwe nguva zvinonzi "membrane yakapfava". Iko kushandiswa kwesimba re nanofiltration system yakaderera, uye simba rekushandisa rakaderera pane iro rinoenderana reverse osmosis system.
6. Chii chinonzi kupatsanura kugona kwe membrane tekinoroji?
Reverse osmosis ndiyo chaiyo chaiyo yekusefa tekinoroji parizvino. Reverse osmosis membrane inokwanisa kubata mamorekuru akadai semunyu unonyunguduka uye zvinhu zvine huremu hwemamorekuru hunodarika 100. Ukuwo, mamorekuru emvura anogona kupfuura nepakati nepakati reverse osmosis membrane, uye chiyero chekubvisa cheyakajairika soluble salt is> 95- 99%. Kudzvinyirira kwekushanda kunotangira pa7bar (100psi) kana mvura inopinza iri mvura ine brackish kusvika 69bar (1000psi) apo mvura inopinza iri mvura yegungwa. Nanofiltration inogona kubvisa tsvina yezvikamu pa 1nm (10A) uye zvinhu zvehupenyu zvine huremu hwema molecular kupfuura 200 ~ 400. Muyero wekubviswa kwezvinhu zvakanyunguduka ndeye 20 ~ 98%, iyo yemunyu ine univalent anions (yakadai seNaCl kana CaCl2) i20 ~ 80%, uye iyo yemunyu ine bivalent anions (yakadai seMgSO4) i90 ~ 98%. Ultrafiltration inogona kuparadzanisa macromolecules akakura kupfuura 100 ~ 1000 angstroms (0.01 ~ 0.1 μ m). Zvese zvinonyunguduka munyu uye mamorekuru madiki anogona kupfuura nepakati peiyo ultrafiltration membrane, uye zvinhu zvinogona kubviswa zvinosanganisira colloids, mapuroteni, microorganisms uye macromolecular organics. Huremu hwemamorekuru hwema ultrafiltration membranes ndeye 1000 ~ 100000. Huwandu hwezvikamu zvakabviswa ne microfiltration inenge 0.1 ~ 1 μ m. Kazhinji, zvakamiswa zvakasimba uye hombe particle colloids inogona kubatwa nepo macromolecules uye soluble salts inogona kupfuura nemukati me microfiltration membrane. Iyo microfiltration membrane inoshandiswa kubvisa mabhakitiriya, micro flocs kana TSS. Dzvinyiriro pamativi ese e membrane inowanzoita 1 ~ 3 bar.
7. Ndeipi yakanyanya kubvumirwa silicon dioxide concentration ye reverse osmosis membrane inlet mvura?
Iyo yakanyanya kubvumidzwa kusungirirwa kwesilicon dioxide kunoenderana nekupisa, pH kukosha uye scale inhibitor. Kazhinji, iyo yakanyanya kubvumidzwa kusanganiswa kwemvura yakadzika ndeye 100ppm isina scale inhibitor. Mamwe mascale inhibitors anogona kubvumira kuwanda kwesilicon dioxide mumvura yakadzika kuve 240ppm.
8. Chii chinokonzera chromium paRO firimu?
Mamwe masimbi anorema, senge chromium, anokonzeresa oxidation yeklorini, nekudaro zvichikonzera kuparara kusingadzoreki kwe membrane. Izvi zvinodaro nekuti Cr6 + haina kugadzikana pane Cr3 + mumvura. Zvinoita sekunge iyo inoparadza mhedzisiro yesimbi ion ine yakakwira oxidation mutengo wakasimba. Naizvozvo, kuwanda kwechromium kunofanirwa kuderedzwa muchikamu chekutanga kana kuti Cr6 + inofanira kuderedzwa kusvika Cr3 +.
9. Imhandoi yepretreatment inowanzodiwa kune RO system?
Iyo yakajairwa pre-treatment system ine coarse filtration (~ 80 μ m) kubvisa zvimedu zvakakura, kuwedzera oxidants senge sodium hypochlorite, wozonyatso kusefa kuburikidza ne-multi-media sefa kana clarifier, kuwedzera oxidants sesodium bisulfite kuderedza yakasara chlorine, uye pakupedzisira kuisa sefa yekuchengetedza pamberi pekupinza kwepombi yepamusoro-yekumanikidza. Sezvinoreva zita, iyo chengetedzo sefa ndiyo yekupedzisira inishuwarenzi chiyero chekudzivirira netsaona zvidimbu zvakakura kubva mukukuvadza yakakwirira-kudzvanywa pombi impeller uye membrane element. Zvitubu zvemvura zvine zvidimbu zvakaturikwa kazhinji zvinoda dhigirii yepamusoro yepretreatment kuti isangane nezvinodiwa zvekupinda kwemvura; Kune zvitubu zvemvura zvine kuomarara kwakanyanya, zvinokurudzirwa kushandisa kupfava kana kuwedzera acid uye scale inhibitor. Kune zvitubu zvemvura zvine yakakwira microbial uye organic zvemukati, activated kabhoni kana anti kusvibisa membrane zvinhu zvinofanirwa kushandiswa zvakare.
10. Ko reverse osmosis inogona kubvisa utachiona hwakadai semavhairasi nemabhakitiriya?
Reverse osmosis (RO) yakaoma kwazvo uye ine yakanyanya kubviswa mwero wevhairasi, bacteriophages uye mabhakitiriya, inodarika 3 log (yekubvisa> 99.9%). Nekudaro, zvinofanirwa kucherechedzwawo kuti muzviitiko zvakawanda, ma microorganisms anogona kuramba achibereka zvakare padivi rinogadzira mvura ye membrane, iyo inonyanya kuenderana nenzira yekuunganidza, kutarisa uye kugadzirisa. Mune mamwe mazwi, kugona kwehurongwa kubvisa tupukanana kunoenderana nekuti dhizaini, mashandiro uye manejimendi akakodzera kwete pane chimiro chemembrane element pachayo.
11. Ko tembiricha inobata sei goho remvura?
Kana tembiricha yakakwira, ndiko kuwedzera kwegoho remvura, uye zvakasiyana. Paunenge uchishanda pakupisa kwepamusoro, kushandiswa kwekushanda kunofanira kuderedzwa kuchengetedza goho remvura risina kuchinjwa, uye zvakasiyana.
12. Chii chinonzi particle uye colloid kusvibiswa? Kuyera sei?
Kamwe kusvibiswa kwezvidimbu uye colloids kunoitika mune reverse osmosis kana nanofiltration system, goho remvura re membrane richakanganiswa zvakanyanya, uye dzimwe nguva chiyero che desalination chinodzikiswa. Chiratidzo chekutanga che colloid fouling ndiko kuwedzera kweiyo system differential pressure. Kunobva zvimedu kana colloids mu membrane inlet mvura sosi inosiyana kubva munzvimbo nenzvimbo, kazhinji inosanganisira mabhakitiriya, sludge, colloidal silicon, iron corrosion zvigadzirwa, etc. Mishonga inoshandiswa muchikamu che pretreatment, senge polyaluminium chloride, ferric chloride kana cationic polyelectrolyte. , inogonawo kukonzera kukanganisa kana isingakwanise kubviswa mujekerere kana media sefa.
13. Nzira yekuziva nzira yekuisa brine seal ring pane membrane element?
Iyo brine seal mhete pane membrane element inodiwa kuti iiswe pamvura inopinza yechinhu, uye iyo yekuvhura inotarisana neinopinza mvura. Kana mudziyo wekumanikidza uchidyiswa nemvura, kuvhurika kwayo (kumucheto kwemuromo) kuchave kuchizovhurwazve kuti ivhare zvachose kuyerera kwemvura yedivi kubva kune membrane element kusvika kumadziro emukati meiyo yekumanikidza mudziyo.
Nguva yekutumira: Nov-14-2022