Cov teeb meem tshwm sim hauv kev siv cov khoom siv rov qab osmosis membrane

1. Dej flux attenuation

Yog vim li cas: Membrane fouling, organic teeb meem, inorganic teeb meem, tshem tawm cov khib nyiab, microorganisms thiab lwm yam kuab paug nyob rau hauv cov dej qhov chaw yuav maj mam accumulate nyob rau saum npoo ntawm daim nyias nyias, tsim ib daim nyias nyias fouling txheej; Scaling teeb meem, qhov twg hardness ions nyob rau hauv dej hnov ​​​​mob nrog rau lwm yam ions nyob rau hauv daim tawv nqaij daim tawv nqaij deposits; Membrane aging, raws li lub sij hawm siv nce, cov ntaub ntawv membrane yuav undergo ib co degree ntawm kev laus; Kev khiav hauj lwm tsis zoo, xws li siab inlet siab heev, siab inlet txaus tus nqi, los yog siab inlet kub heev; Kev tu tsis tiav yuav ua rau kev tshem tawm tsis tiav ntawm cov pa phem, ua rau cov khoom ua paug rau ntawm daim nyias nyias dua.

Txoj kev txiav txim: Tsis tu ncua saib xyuas cov dej ntau lawm thiab qhov zoo ntawm qhov rov qab osmosis system, sib piv cov dej ntws thawj zaug thiab tam sim no thaum ua haujlwm; Thaum saib xyuas cov kev hloov pauv hauv qhov system siab thiab cov dej ntws tawm tau tshwm sim, lub kaw lus yuav xav tau siab dua kom tswj tau qhov qub dej ntau lawm; Qhov txo qis hauv cov dej ntws ntawm cov khoom membrane feem ntau yog nrog los ntawm kev txo qis ntawm cov ntsev tshem tawm. Yog tias cov ntsev tshem tawm tau pom tias qis dua tus nqi tsim qauv thaum kuaj, nws yuav yog lub teeb liab ntawm cov dej ntws tawm.

Kev ntsuas teb: Tsis tu ncua ntxuav cov txheej membrane thiab xaiv cov tshuaj ntxuav kom tsim nyog rau kev rov qab ntxuav raws li hom pa phem; Xyuas kom meej tias cov kev khiav hauj lwm ntawm cov membrane system nyob rau hauv qhov kev pom zoo, tsis txhob muaj ntau inlet siab thiab kub, thiab xyuas kom meej ruaj khov inlet txaus tus nqi; Kev siv cov txheej txheem ua ntej ua ntej xws li sedimentation, pom, softening, thiab tshem tawm hlau kom txo tau cov pa phem hauv dej; Yog tias cov dej ntws tawm ntawm daim nyias nyias tsis tau rov qab zoo dua tom qab ntau lub voj voog tu thiab muaj cov tsos mob ntawm kev laus lossis kev puas tsuaj rau cov khoom siv membrane, kev hloov ntawm daim nyias nyias yuav raug txiav txim siab.

2.Scaling phenomenon

Yog vim li cas: Cov dej tsis zoo tsis tau txheeb xyuas tag nrho, ua rau muaj kev tsim tsis tsim nyog; Kev siv tsis raug lossis siv tsis txaus ntawm cov nplai inhibitors; Cov dej zoo tau hloov pauv, thiab cov txheej txheem kev ua haujlwm tsis tau hloov kho raws sijhawm.

Cov lus qhia teb: Ua ib qho kev ntsuam xyuas tag nrho ntawm cov dej zoo ua ntej tsim qhov system; Xaiv cov scale inhibitors / dispersants rau koob tshuaj; Kho qhov system khiav hauj lwm tsis raws sij hawm thaum dej hloov pauv; Tshem tawm lossis txo cov ions uas ua rau scaling thaum lub sijhawm ua ntej.

3.Oxidation tshwm sim

Yog vim li cas: Cov tshuaj chlorine ntau dhau los lossis lwm yam tshuaj oxidizing nyob rau hauv cov dej nkag ntawm daim nyias nyias.

Cov lus qhia teb: Siv cov kev ntsuas xws li ntxiv cov tshuaj txo qis kom ntseeg tau tias cov tshuaj chlorine seem hauv cov neeg muaj zog tsawg dua 0.1ppm; Nruab ORP / cov khoom siv tshuaj chlorine seem hauv lub kaw lus rau kev saib xyuas lub sijhawm kom ntseeg tau tias cov tshuaj oxidizing tsis nkag mus rau hauv daim nyias nyias RO system.

4.Telescope phenomenon

Yog vim li cas: Kev ua tsis tau raws li qhov yuav tsum tau ua thaum lub sij hawm installation los yog disassembly ua rau cov txheeb ze misalignment ntawm rov qab osmosis membranes; Tsis txaus rigidity thiab lub zog ntawm lub plhaub membrane ua rau deformation thaum lub sijhawm ua haujlwm siab; Thaum pib lub twj tso kua mis siab, qhov nkag siab ntawm qhov system nce sai heev.

Cov lus qhia teb: Ntxiv dag zog rau kev sau thiab tshuaj xyuas cov ntaub ntawv ua haujlwm. Tom qab cov ntaub ntawv standardization, thaum lub siab sib txawv tshaj 15% ntawm tus nqi pib, tshuaj ntxuav yuav tsum tau ua raws sij hawm, thiab yuav tsum tau them nyiaj mloog kom tsis pub tshaj qhov siab tshaj plaws siab sib txawv. Thaum muaj qhov tshwm sim ntawm lub tsom iav loj loj tshwm sim, nws yog ib qho tsim nyog yuav tsum tau hloov cov khoom siv ntawm cov membrane puas thiab tshawb xyuas qhov ua rau lub siab sib txawv tshaj tus qauv.

5.Concentration polarization tshwm sim

Yog vim li cas: Thaum lub sijhawm rov qab osmosis txheej txheem, vim yog qhov txuas ntxiv ntawm cov dej los ntawm daim nyias nyias, muaj qhov sib txawv ntawm cov dej ntsev nyob ze ntawm daim nyias nyias thiab cov dej ntsev nkag. Lub concentration ntawm cov tshuaj nyob rau hauv daim nyias nyias yog siab, thiab raws li ib tug loj npaum li cas ntawm cov dej hla mus rau hauv daim nyias nyias, lub concentration nce ho, tsim ib tug supersaturated tov. Qee cov ntsev yuav maj mam precipitate crystals.

Cov lus qhia teb: Ua kom tus nqi ntws ntawm cov dej concentrated thiab nce lub zog shear ntawm daim nyias nyias; Tswj tus nqi rov qab thiab qhov nruab nrab flux.

6.Compaction phenomenon

Yog vim li cas: Siab inlet siab, siab kub, dej rauj. Thaum muaj huab cua nyob rau hauv qhov rov qab osmosis system, lub twj tso kua mis siab pib pib. Lub siab ntawm lub twj tso kua mis siab siab nce sai heev, uas tuaj yeem ua rau muaj kev cuam tshuam rau lub zog ntawm RO daim nyias nyias, ua rau cov dej rauj cuam tshuam thiab yooj yim puas rau rov qab osmosis membrane.

Cov lus qhia teb: Tom qab cov txheej membrane yog compressed, lub membrane puas yuav tsum tau hloov; Tswj cov kev khiav hauj lwm siab thiab kub ntawm lub membrane caij nyob rau hauv lub tsim yuav tsum tau.

7.Membrane nto puas

Yog vim li cas: Cov teeb meem hauv cov dej nkag nkag mus rau hauv RO system, ua rau khawb ntawm daim nyias nyias; Kos los ntawm cov khoom scaling; Dej rauj; Cov tshuaj lom neeg tuaj yeem ua rau muaj kev puas tsuaj rau daim nyias nyias.

Cov lus qhia teb: Hloov cov lim kev ruaj ntseg hauv lub sijhawm kom tsis txhob muaj cov khoom tawv tawv hauv cov dej nkag mus rau hauv daim nyias nyias; Thaum ntxuav cov fouling membrane cov khoom, thawj zaug txaus tus nqi yuav tsum raug txo kom tsis txhob muaj kev puas tsuaj los ntawm kev ntws tawm ntau dhau; Txhawm rau tiv thaiv cov dej rauj, cov pa tso pa qis yuav tsum tau nqa tawm ua ntej pib lub twj tso kua mis siab, thiab qhov nce siab ntawm lub twj tso kua mis siab yuav tsum tsis txhob ceev heev. Kev hloov pauv zaus, pib muag muag lossis hluav taws xob qeeb qhib valve yuav tsum siv rau kev pib lub twj tso kua mis siab; Tiv thaiv cov tshuaj tsis sib xws los ntawm kev nkag mus rau hauv daim nyias nyias.