Vim li cas nanofiltration membranes yuav tsum tau ntxuav tsis tu ncua?
Vim hais tias cov nanofiltration membrane yuav siv sij hawm ntev nyob rau hauv cov txheej txheem ntawm kev siv, cov khoom raug tshem tawm thiab qee cov impurities hauv dej yuav thaiv qhov pore loj ntawm cov lim membrane nto, ua rau cov membrane thaiv, thiab lub sij hawm ntev blockage yuav ua rau cov dej ntau lawm, thiab nws yuav cuam tshuam rau nanofiltration membrane caij. Ua rau kev puas tsuaj irreversible.
Ntev npaum li cas lub voj voog tu ntawm nanofiltration membranes?
Feem ntau, kev tu lub voj voog ntawm nanofiltration membrane feem ntau yog txiav txim siab raws li kev siv cov txheej txheem membrane, feem ntau yog li peb lub hlis, tab sis thaum cov dej tsim tawm ntawm cov txheej membrane txo qis, cov nanofiltration membrane yuav tsum tau ntxuav hauv lub sijhawm.
Kuv yuav tsum xyuam xim rau dab tsi thaum ntxuav lub nanofiltration membrane?
Siv cov dej oxidant zoo uas tsis muaj cov tshuaj chlorine seem thiab lwm cov oxidants rau yaug
Thaum npaj cov tshuaj ntxuav, xyuas kom meej tias tag nrho cov tshuaj ntxuav tau zoo yaj thiab sib tov ua ntej nkag mus rau hauv lub voj voog.
Tom qab cov tshuaj ntxuav thiab cov khoom siv hauv daim nyias nyias tau nthuav tawm, cov txheej txheem membrane yuav tsum tau muab yaug nrog cov dej zoo uas tsis muaj cov tshuaj chlorine seem thiab lwm cov oxidants (tsawg kub> 20 ℃).
Kub thiab PH tus nqi
Thaum lub sij hawm lub voj voog ntawm kev ntxuav, qhov kub yuav tsum tsis pub tshaj 50C ntawm pH 2-10, qhov kub yuav tsum tsis pub tshaj 35C ntawm pH 1-11, thiab qhov kub yuav tsum tsis txhob ntau tshaj 30C ntawm pH 1-12.
Kev taw qhia ntws ntawm cov kua dej huv
Rau cov khoom uas muaj txoj kab uas hla ntau dua 6 ntiv tes, cov kev taw qhia ntws ntawm cov dej ntxuav yuav tsum zoo ib yam li cov kev khiav hauj lwm ib txwm ua kom tsis txhob muaj qhov cuam tshuam los ntawm kev tsim "tsoov tshuaj" tshwm sim, vim hais tias lub nplhaib thrust nyob rau hauv lub siab lub nkoj tsuas yog ntsia rau ntawm cov dej concentrated kawg ntawm lub nkoj siab. Nws kuj raug pom zoo kom ua tib zoo saib rau qhov no thaum ntxuav lub cev ntawm cov khoom me me.
Ua tib zoo ntxuav cov tshuaj detergent seem
Thaum ntxuav, ua tib zoo saib xyuas kom huv si ntxuav cov tshuaj ntxuav tes uas seem hauv daim nyias nyias. Yog tias tus neeg saib xyuas tsis tau ntxuav kom huv si, nws yooj yim heev los tsim cov av hauv daim nyias nyias, thiab tseem ua rau lub neej ua haujlwm luv ntawm nanofiltration membrane. Cov tshuaj ntxuav alkaline muaj lub zog tu qis kom tshem tawm cov stains.
Yuav ua li cas mus cuag lub voj voog tu ntawm nanofiltration membranes?
Nce kev kho mob
Kev nce cov txheej txheem pretreatment feem ntau yog siv ntev tshaj plaws, thiab cov dej nyoos tuaj yeem kho ua ntej los ntawm cov txheej txheem xws li cov ntxaij lim dej ntau thiab ultrafiltration membranes los txhim kho cov dej zoo, uas tuaj yeem txo cov pa phem ntawm nanofiltration membrane cov ntsiab lus.
Ntxiv kua qaub
CaCO3 nyob rau hauv feem ntau cov dej saum npoo av thiab hauv av yuav luag saturated. Yog li, los ntawm kev ntxiv H nplooj rau hauv cov kua qaub, cov tshuaj sib npaug tuaj yeem hloov mus rau sab laug kom cov calcium carbonate nyob rau hauv lub xeev yaj. Qhov zoo ntawm cov kua qaub siv yuav tsum yog qib zaub mov. Nyob rau hauv ntau lub teb chaws thiab cheeb tsam, sulfuric acid yog siv yooj yim dua li hydrochloric acid, tab sis ntawm qhov tod tes, cov ntsiab lus ntawm sulfate radicals hauv dej muaj zog nce. Raws li qhov ntsuas sulfate muaj kev txhawj xeeb, qhov teeb meem yuav loj heev.
Ntxiv antiscalant
Scale inhibitors tuaj yeem siv los tswj carbonate nplai, sulfate nplai, thiab calcium fluoride nplai. Feem ntau muaj peb hom scale inhibitors: sodium hexametaphosphate (SHMP), organic phosphate, thiab polyacrylate. Nws yog qhov tsim nyog rau kev tiv thaiv qhov ntsuas ntawm insoluble aluminium thiab hlau, thiab lub siab molecular hnyav polyacrylate tuaj yeem txo qhov tsim ntawm SiO2 scaling los ntawm cov nyhuv dispersion.
Ntxiv softening resin
Na + z ion tuaj yeem siv los hloov thiab tshem tawm cov nplai cations xws li Ca2+, Ba2+, thiab Sr2+ hauv dej. Thaum kho qhov no, pH ntawm cov dej muaj zog yuav tsis hloov. Yog li ntawd, tsis muaj kev ua haujlwm degassing yog yuav tsum tau.
Post lub sij hawm: Jun-28-2021