Daim ntawv thov ntawm Reverse Osmosis Membrane thiab Related Technologies hauv Kev Kho Dej

1. Kev kho dej khib nyiab

Kev kho dej khib nyiab yog qhov tseem ceeb ntawm kev rov qab osmosis membranes. Los ntawm thim rov qab osmosis thev naus laus zis, cov hlau hnyav lossis cov roj uas muaj cov dej khib nyiab tsim los ntawm cov chaw tsim hluav taws xob thiab cov chaw luam ntawv thiab dyeing tuaj yeem kho tau zoo. Nws kuj tseem siv tau los kho cov dej phwj hauv nroog, cov khib nyiab pov tseg, thiab lwm yam, ua tiav cov peev txheej dej rov qab.

Nyob rau hauv cov txheej txheem ntawm thermal zog tsim, ib tug loj npaum li cas ntawm circulating dej txias yog siv, uas feem ntau muaj ntau yam impurities thiab siab turbidity. Yog tias tso tawm ncaj qha, nws yuav ua rau muaj kuab paug rau ib puag ncig. Kev sib xyaw ntawm hollow fiber ultrafiltration membrane cov ntsiab lus thiab polyamide composite thim rov qab osmosis membrane tuaj yeem kho cov dej txias rau hauv cov dej rov siv tau nrog dej turbidity hauv qab 0.02 NTU thiab cov pa phem hauv qab 0.7.

Cov dej khib nyiab tsim los ntawm cov chaw luam ntawv thiab dyeing muaj ntau cov ntsev ions, xim ions, thiab lwm yam khoom. Kev siv ultrafiltration thiab thim rov qab osmosis dual membrane tshuab tuaj yeem lim tawm cov organic teeb meem, ntsev ions, thiab lwm yam hauv cov dej khib nyiab, thiab cov tshuaj lom neeg oxygen noj ntawm cov dej tsim tsis siab tshaj 10 mg / L, qhia txog kev kho dej tseem ceeb.

Hauv cov txheej txheem kev kho dej khib nyiab ib txwm muaj cov hlau hnyav, cov tshuaj siv tshuaj yuav tsum tau ntxiv, thiab kev kho cov haujlwm yuav tsum muaj siab. Kev siv rov qab osmosis daim nyias nyias thiab ntau theem rov qab osmosis thev naus laus zis los kho cov dej khib nyiab no tuaj yeem tshem tawm cov hlau hnyav uas muaj nyob hauv cov dej khib nyiab.

Cov khoom uas muaj nyob rau hauv nroog khib nyiab leachate yog ntau thiab complex. Kev siv cov polyamide thim rov qab osmosis membrane rau nws txoj kev kho mob tuaj yeem ntxuav cov kua dej ntawm cov khib nyiab mus rau theem tawm, ua tiav cov kev kho mob ntawm cov khib nyiab pov tseg.

2. Kev tsim cov dej ntshiab

Cov dej ntshiab huv muaj ntau yam kev siv hauv cov dej haus hauv tsev, kev tsim khoom, thiab tshuaj. Cov ntawv thov no muaj cov kev xav tau siab rau dej, thiab kev siv rov qab osmosis membranes rau kev kho dej yuav tsum ua raws li cov qauv tsim nyog.

Vim yog cov txheej txheem tsim khoom ntawm cov dej ntshiab ultrapure, cov khoom sib txuas permeable membrane tuaj yeem siv rau hauv ultrapure dej ntau lawm. Qhov rov qab osmosis system tuaj yeem tswj cov dej ntws mus txog 650 m ³/ h thiab tsim cov dej ultrapure nrog cov conductivity ntawm 0.3 m S / cm. Qhov teeb meem ntawm daim nyias nyias fouling thaum kho dej tuaj yeem daws tau los ntawm kev siv tshuaj ntxuav tes. Tam sim no feem ntau siv cov dej ntshiab huv yog qhov rov qab osmosis electrodeionization system.

Nyob rau hauv cov nqe lus ntawm kev lag luam dej ntau lawm, thiaj li ua tau raws li qhov xav tau ntawm kev siv, cov kws tshawb fawb hauv tsev tau npaj cov kev daws teeb meem los tsim kom rov qab osmosis system siv ultra-low siab yob hom composite membrane cov khoom. Cov dej ib leeg ntawm cov permeable membrane nyob rau hauv cov tswv yim no tuaj yeem ncav cuag 41.4 cubic meters ib hnub twg, nrog tus nqi khaws cia tsis pub tsawg dua 99.7%, uas tuaj yeem ua tau raws li qhov xav tau ntawm cov dej hauv kev lag luam caustic soda.

Tsis tas li ntawd, hauv kev tsim cov chlor alkali kev lag luam, nws yuav tsum tau lim tawm Ca ² ⁺ thiab Mg ² ⁺ ions hauv dej thaum lub sijhawm tsim khoom. Yog li ntawd, PVD rov qab osmosis daim nyias nyias tuaj yeem siv los tshem tawm lawv, thaum ua kom tus nqi qis qis rau sodium chloride, kom ua tiav cov dej kho thiab ntxuav hauv chlor alkali kev lag luam ntau lawm.

Nyob rau hauv kev tsim tshuaj, siv ib tug ultra-low siab polyamide composite permeable membrane module ion cais system thiab siv ob-theem rov qab osmosis txoj kev los tsim cov dej ntshiab uas yuav tsum tau nyob rau hauv cov tshuaj ntau lawm txheej txheem yuav ua tau zoo ntau lawm. Cov txheej txheem kev kho dej no muaj qhov rov qab tsis tsawg dua 80% tom qab rov qab osmosis theem nrab, uas coj cov txiaj ntsig tseem ceeb rau cov tuam txhab tshuaj.