dej hiav txwv dej kho cog dej ro system Chaw tsim tshuaj paus

Cov txheej txheem khoom

EDI thev naus laus zis yog txheej txheem desalination tshiab uas ua ke nrog electrodialysis thiab ion pauv.Cov txheej txheem no siv qhov zoo ntawm qhov muaj zog ntawm ob qho tib si electrodialysis thiab ion pauv thiab them nyiaj rau lawv qhov tsis muaj zog.Nws siv ion txauv kom sib sib zog nqus desalinate kom kov yeej qhov teeb meem ntawm kev ua tsis tiav desalination los ntawm electrodialysis polarization.Nws kuj tseem siv electrodialysis polarization los tsim H + thiab OH- ions rau kev hloov pauv tsis siv neeg, uas kov yeej qhov tsis zoo ntawm cov tshuaj rov tsim dua tshiab tom qab cov resin tsis ua haujlwm.Yog li, EDI thev naus laus zis yog txheej txheem desalination zoo meej.

Thaum lub sij hawm EDI desalination txheej txheem, ions nyob rau hauv dej yog pauv nrog hydrogen ions los yog hydroxide ions nyob rau hauv lub ion pauv resin, thiab ces cov ions no tsiv mus rau hauv cov concentrated dej.Qhov kev sib pauv ion no tshwm sim hauv cov dej dilute chav tsev.Nyob rau hauv lub dilute dej chamber, hydroxide ions nyob rau hauv lub anion pauv resin pauv nrog cov anions nyob rau hauv dej, thiab cov hydrogen ions nyob rau hauv lub cation txauv resin pauv nrog cov cations nyob rau hauv dej.Cov ions sib pauv ces tsiv mus nyob rau saum npoo ntawm cov pob cob pob nyob rau hauv qhov kev txiav txim ntawm DC hluav taws xob tam sim no thiab nkag mus rau hauv chav dej concentrated los ntawm kev sib pauv ion.

Tsis zoo them anions yog attracted rau lub anode thiab nkag mus rau cov nyob ib sab concentrated dej chamber los ntawm cov anion membrane, thaum lub cation membrane uas nyob ib sab tiv thaiv lawv los ntawm thiab thaiv cov ions nyob rau hauv cov concentrated dej.Cov cations zoo yog nyiam mus rau cathode thiab nkag mus rau hauv cov dej concentrated chamber uas nyob ib sab los ntawm cov cation membrane, thaum uas nyob ib sab anion membrane tiv thaiv lawv los ntawm thiab thaiv cov ions nyob rau hauv cov concentrated dej.

Nyob rau hauv cov dej concentrated, cov ions los ntawm ob qho tib si kev taw qhia tswj hluav taws xob nruab nrab.Lub caij no, qhov tam sim no thiab cov ion tsiv teb tsaws yog proportional, thiab tam sim no muaj ob feem.Ib feem yog los ntawm kev tsiv teb tsaws ntawm cov ions tshem tawm, thiab lwm qhov yog los ntawm kev tsiv teb tsaws ntawm cov dej ions uas ionize rau hauv H + thiab OH- ions.Thaum cov dej dhau los ntawm cov dej diluted thiab concentrated dej chamber, cov ions maj mam nkag mus rau hauv cov dej concentrated nyob ib sab thiab nqa tawm ntawm chav tsev EDI nrog cov dej concentrated.

Nyob rau hauv lub high voltage gradient, dej yog electrolyzed los tsim ib tug loj npaum li cas ntawm H + thiab OH-, thiab cov on-site tsim H + thiab OH- tsis tu ncua regenerate cov ion pauv resin.Yog li ntawd, ion exchange resin nyob rau hauv lub chav tsev EDI tsis xav tau tshuaj regeneration.Qhov no yog EDI desalination txheej txheem.

Technical nta

1. Nws tuaj yeem tsim cov dej tsis tu ncua, thiab qhov kev tiv thaiv ntawm cov dej tsim tau siab, xws li 15MΩ.cm txog 18MΩ.cm.
2. Cov dej ntau lawm tuaj yeem ncav cuag tshaj 90%.
3. Cov dej ua tau zoo yog qhov ruaj khov thiab tsis tas yuav muaj cov kua qaub-puag dua.
4. Tsis muaj dej khib nyiab tsim nyob rau hauv cov txheej txheem.
5. Lub kaw lus tswj yog siab automated, nrog kev ua haujlwm yooj yim thiab kev siv zog tsawg.T

Cov kev cai tseem ceeb

1. Cov dej pub mis yuav tsum yog RO-tsim cov dej uas muaj qhov ua tau zoo ntawm ≤20μs / cm (pom zoo kom <10μs / cm).
2. Tus nqi pH yuav tsum nyob nruab nrab ntawm 6.0 thiab 9.0 (pom zoo yuav tsum nyob nruab nrab ntawm 7.0 thiab 9.0).
3. Cov dej kub yuav tsum nyob nruab nrab ntawm 5 txog 35 ℃.
4. Lub hardness (xws li CaCO3) yuav tsum tsawg tshaj li 0.5 ppm.
5. Cov organic teeb meem yuav tsum tsawg dua 0.5 ppm, thiab tus nqi TOC raug pom zoo kom tsis txhob xoom.
6. Cov oxidants yuav tsum tsawg dua los yog sib npaug ntawm 0.05 ppm (Cl2) thiab 0.02 ppm (O3), nrog rau ob qho tib si xoom raws li qhov kev pom zoo.
7. Qhov siab ntawm Fe thiab Mn yuav tsum tsawg dua lossis sib npaug ntawm 0.01 ppm.
8. Qhov concentration ntawm silicon dioxide yuav tsum tsawg dua 0.5 ppm.
9. Qhov concentration ntawm carbon dioxide yuav tsum tsawg tshaj li 5 ppm.
Yuav tsum tsis txhob muaj roj lossis rog.