Kev kho cov kua qaub-muaj dej ntas wastewater

AccessSwater yog cov dej khov kho nrog pH nqi tsawg dua 6. Acidic dej khib nyiab tuaj yeem faib ua cov kua qaub inorganic acid dej thiab cov organic acid dej. Muaj zog acid ntauv thiab qaug zog cov kua qaub; Monoacid cov dej khib nyiab thiab polyacid dej cia; Qes cov siab acidic pov tseg acidic dej thiab siab accompric acidic dej. Feem ntau acidic dej khib nyiab, ntxiv rau muaj qee cov kua qaub, feem ntau tseem muaj cov hlau hnyav thiab lawv cov ntsev thiab lwm yam yeeb yam. AccessSewic dej los ntawm ntau qhov chaw, xws li mineidetallurgy, cov roj ntsha, elicter loj, cov roj ntsha, hluav taws xob, cov fibers, khoom siv lwm yam muaj cov sectors. Cov khoom siv tshuaj pleev ib ce yog li sulphuric acid dej khib nyiab, ua raws los ntawm hydrochloric acid thiab nitric acid ntauv ntas. Txhua txhua xyoo, Suav yog hais txog kev tawm tsam ze li ib lab sau cubic metre ntawm cov khib nyiab, yog tias cov qoob loo puas tsuaj, yog tias cov khoom siv pov tseg, nws puas tsuaj, thiab ua kom puas tsuaj ib puag ncig. Muaj cov kua roj ntsha ua kom tau txais kev kho kom tau raws li cov qauv hauv tebchaws teb chaws ua ntej tawm, cov kua qaub tsis tuaj yeem rov siv dua thiab rov siv dua. Thaum kho cov khib nyiab, cov hau kev tuaj yeem xaiv tau muaj xws li cov qauv ntsev, cov txheej txheem tshuaj lom neeg, kos duab sib pauv txheej txheem, thiab lwm yam.

1. Ntsev tawm rov ua dua tshiab

Qhov thiaj li hu ua salting tawm yog siv ntau npaum li cas ntawm cov ntsev noo noo kom precipate yuav luag txhua cov organic impurities nyob rau hauv cov khib acid. Txawm li cas los xij, hom no yuav tsim cov acid hydrochloric acid thiab siv tau cov organic acid, yog li kev siv cov kua khib nyiab hauv cov kuab khib nyiab nrog cov kua khib nyiab nrog sodium bisulphaate solticial kev daws tau kawm.
Cov khib nyiab acid muaj cov sulfuric acid thiab ntau yam organic impurities, uas yog ntau yam isometoluene-4-nitrotoluene-4-nitrotoluene-3-nitrotoluene-4-nitrotholuene-4-nitrotool-3-nitrotoluene Txoj kev salting tawm yog los siv ntau npaum li cas ntawm cov ntsev noo noo kom prekipate yuav luag txhua cov organic impurities nyob rau hauv cov khib acid. Cov txheej txheem ntsev tsis tuaj yeem tsuas yog tshem tawm ntau cov organic cov organic nyob rau hauv cov khib nyiab acid kom muab tso rau ntau lawm, txuag tus nqi thiab lub zog.

2. Roasting Txoj Kev

Cov txheej txheem ci tau siv rau cov roj tsw qab xws li cov tshuaj acid, uas tau sib cais los ntawm kev daws teeb meem los ntawm kev daws teeb meem kom rov ua tiav.

3. Tshuaj Txhaum Cai Needralization

Qhov yooj yim acid-puag tshuaj tiv thaiv ntawm h + (Aq) + Oh- (AQ) = H2O tseem yog ib qho tseem ceeb rau kev kho cov kua qaub ntawm cov kua qaub. Cov txheej txheem sib xws rau kev kho cov kua qaub muaj cov khib nyiab, feem ntau siv cov pa roj ntsha, thiab cov roj ntsha ua kom zoo nkauj Txheem. Sodium Carbonate (dej qab zib Hydroxide, Limestone lossis kua qaub ua cov kua qaub yog qhov pheej yig, yooj yim ua txiv qaub.

4. Cov qauv sib zog

Ua kua ua kua extraction, tseem hu ua cov kuab tshuaj extraction, yog chav haujlwm ua haujlwm uas siv qhov sib txawv hauv cov khoom siv uas tsim nyog kom ua tiav kev sib cais. Hauv kev kho cov kua qaub muaj dej khib nyiab, nws yog qhov tsim nyog los ua kom cov kua qaub thiab cov organic nyob rau hauv cov khib nyiab pauv mus rau cov kuab tshuaj. Cov extractant yuav tsum yog: (1) rau cov khib nyiab khib nyiab yog inert, tsis yog chemically reason nrog cov khib nyiab, thiab tsis yaj nyob hauv cov khib nyiab; (2) Cov impurities nyob rau hauv cov khib nyiab acid muaj kev faib tawm siab coefficient nyob rau hauv extractant thiab sulfuric acid; (3) Tus nqi yog pheej yig thiab yooj yim kom tau txais; (4) Yooj yim cais los ntawm impurities, poob me me thaum stripping. Cov extractants ib txwm muaj xws li Benzene (Toluene (nitrobenzene, trichoetated hydrodolons (trichloroethan), isopropalis ether thiab n-503.

5. Ion txauv cov qauv resin

Tus txheej txheem yooj yim ntawm kev kho cov organic acid pov tseg ua kua los ntawm ion cov kua qaub thiab cov hlau ua kom ua tiav cov kua khib nyiab thiab cov hlau roj ntsha kom ua tiav cov khoom sib cais ntawm cov kua qaub sib txawv thiab ntsev.

6. Mihabrane Sib Cais Qauv

Rau cov acidic pov tseg ua kua, membrane kev kho mob xws li lim ntshav thiab cov hluav taws xob thiab siv hluav taws xob kuj tseem tuaj yeem siv. Membrane rov qab ntawm cov khib nyiab feem ntau yog adopts lub hauv paus ntsiab lus ntawm kev lim ntshav, uas yog tsav los ntawm kev cuam tshuam sib txawv. Tag nrho cov cuab yeej yog tsim ntawm diffusion dhuav, kua rependensing daim phaj, kua yeeb yaj kiab, thiab lwm yam sib cais sib cais ua haujlwm hauv cov khoom pov tseg.

7. Cua crystallization txoj kev

Cua txias cov txheej txheem crystallization yog ib txoj kev los txo qhov kub ntawm kev daws thiab precipualion solution. Nws yog siv nyob rau hauv cov txheej txheem khib nyiab cov khib nyiab tias cov impurities nyob rau hauv cov khib nyiab yog txias tawm kom rov qab ua kom tau cov kua qaub uas ua tau thiab tuaj yeem rov qab siv dua. Piv txwv li, cov khib nyiab sulfuric acid raug rho tawm los ntawm cov txheej txheem ua npuas dej ntawm cov roj hmab uas muaj ntau ntawm cov txheej txheem ntawm cov txheej txheem ntawm cov pej xeem-crystallization thiab pom. Tom qab tshem tawm ntawm ferrous suldate los ntawm kev lim dej, cov kua qaub tuaj yeem xa rov qab mus rau cov txheej txheem steel pickling rau kev siv txuas mus txuas ntxiv.
Cua txias crystallization muaj ntau cov ntawv thov kev lag luam, uas tau qhia ntawm no los ntawm cov txheej txheem pickling hauv kev ua hlau. Nyob rau hauv tus txheej txheem ntawm cov hlau thiab kev ua tshuab, txheej txheem sulfuric tau siv los tshem tawm cov xeb ntawm cov hlau nto. Yog li ntawd, kev rov ua dua ntawm cov khib nyiab tuaj yeem txo tus nqi thiab tiv thaiv ib puag ncig. Cua txias crystallization yog siv hauv kev lag luam kom ua tiav cov txheej txheem no.

8. Oxidation txoj kev

Txoj kev no tau siv sijhawm ntev, thiab cov hauv paus ntsiab lus yog los ua kom muaj kuab lom, yog li nws tuaj yeem hloov pauv cov roj ntsha li qub, yog li ntawd nws tuaj yeem hloov pauv cov kua qaub, yog li ntawd cov khib nyiab sulfuric acid tuaj yeem ua kom huv thiab zoo. Oxidants feem ntau yog hydrogen peroxide, nitric acid, perchloric acid, hypoclorous acid, nitrate, ozone thiab li ntawd. Txhua oxidizer muaj nws cov txiaj ntsig thiab cov kev txwv.