Kev soj ntsuam Feasibility ntawm daim ntawv thov hauv kev kho dej khib nyiab
1. Cov lus qhia yooj yim
Heavy hlau muaj kuab paug yog hais txog ib puag ncig muaj kuab paug los ntawm cov hlau hnyav los yog lawv cov tebchaw.Feem ntau tshwm sim los ntawm tib neeg yam xws li mining, pov tseg roj paug, dej phwj tuaj thiab siv cov khoom siv hlau hnyav.Piv txwv li, dej huab cua thiab kab mob mob hauv Nyij Pooj yog tshwm sim los ntawm mercury pollution thiab cadmium pollution feem.Lub degree ntawm kev puas tsuaj nyob ntawm qhov concentration thiab tshuaj daim ntawv ntawm hnyav hlau nyob rau hauv ib puag ncig, khoom noj khoom haus thiab kab mob.Heavy hlau muaj kuab paug feem ntau tshwm sim nyob rau hauv dej paug, thiab ib feem ntawm nws yog nyob rau hauv cov huab cua thiab cov khoom pov tseg.
Cov hlau hnyav yog hais txog cov hlau uas muaj lub ntiajteb txawj nqus (qhov ntom) ntau dua 4 lossis 5, thiab muaj txog 45 hom hlau, xws li tooj liab, txhuas, zinc, hlau, pob zeb diamond, npib tsib xee, vanadium, silicon, khawm, titanium, manganese. , cadmium, mercury, tungsten, molybdenum, kub, nyiaj, thiab lwm yam Txawm hais tias manganese, tooj liab, zinc thiab lwm yam hlau hnyav yog cov kab uas yuav tsum tau ua rau lub neej ua haujlwm, feem ntau ntawm cov hlau hnyav xws li mercury, lead, cadmium, thiab lwm yam. tsim nyog rau lub neej kev ua ub no, thiab tag nrho cov hlau hnyav saum toj no ib co concentration yog lom rau tib neeg lub cev.
Cov hlau hnyav feem ntau muaj nyob hauv cov xwm txheej hauv ntuj tsim.Txawm li cas los xij, vim muaj kev siv ntau ntxiv, smelting, ua thiab ua lag luam ntawm cov hlau hnyav los ntawm tib neeg, ntau cov hlau hnyav xws li txhuas, mercury, cadmium, cobalt, thiab lwm yam nkag mus rau hauv huab cua, dej, thiab av.Ua rau muaj kuab paug ib puag ncig loj.Cov hlau hnyav hauv ntau lub xeev lossis cov ntaub ntawv tshuaj lom neeg yuav nyob twj ywm, sib sau thiab txav mus tom qab nkag mus rau ib puag ncig lossis ecosystem, ua rau muaj kev puas tsuaj.Piv txwv li, cov hlau hnyav uas tawm nrog cov dej khib nyiab tuaj yeem sib sau hauv algae thiab cov av nkos hauv qab txawm tias qhov concentration me me, thiab raug adsorbed rau saum npoo ntawm cov ntses thiab cov plhaub ntses, ua rau cov khoom noj khoom haus concentration, yog li ua rau muaj kuab paug.Piv txwv li, dej ailments nyob rau hauv Nyiv yog tshwm sim los ntawm mercury nyob rau hauv cov dej khib nyiab tawm los ntawm lub caustic soda manufacturing kev lag luam, uas yog hloov mus rau hauv organic mercury los ntawm kev ua lom;Lwm qhov piv txwv yog mob, uas yog tshwm sim los ntawm cadmium tawm ntawm zinc smelting kev lag luam thiab cadmium electroplating kev lag luam.Rau.Cov hmoov txhuas tawm los ntawm lub tsheb tso rau hauv ib puag ncig los ntawm atmospheric diffusion thiab lwm yam txheej txheem, ua rau muaj kev nce ntxiv ntawm cov hlau lead hauv lub ntiaj teb tam sim no, uas ua rau kev nqus cov hlau lead hauv tib neeg niaj hnub no txog 100 npaug siab dua li cov tib neeg thaum ub, thiab ua rau tib neeg noj qab haus huv. .
Macromolecular hnyav hlau dej kho tus neeg saib xyuas, xim av-liab kua polymer, tuaj yeem cuam tshuam nrog ntau yam hlau hnyav ions hauv dej khib nyiab hauv chav sov, xws li Hg +, Cd2 +, Cu2 +, Pb2 +, Mn2 +, Ni2 +, Zn2 +, Cr3+, thiab lwm yam. los tsim cov dej-insoluble integrated ntsev nrog kev tshem tawm ntau dua 99%.Txoj kev kho mob yog yooj yim thiab yooj yim, tus nqi qis, cov nyhuv zoo kawg li, cov sludge yog me me, ruaj khov, tsis muaj kuab lom, thiab tsis muaj kuab paug thib ob.Nws tuaj yeem siv dav hauv kev kho dej khib nyiab hauv kev lag luam hluav taws xob, mining thiab smelting, hlau ua kev lag luam, fais fab nroj tsuag desulfurization thiab lwm yam lag luam.Kev siv pH ntau: 2-7.
2. Khoom siv daim teb
Raws li ib qho zoo heev hnyav hlau ion tshem tawm, nws muaj ntau yam kev siv.Nws tuaj yeem siv rau yuav luag txhua cov dej khib nyiab uas muaj cov hlau hnyav ions.
3. Siv cov txheej txheem thiab cov txheej txheem raug ntws
1. Yuav siv li cas
1. Ntxiv thiab do
① Ntxiv cov polymer hnyav hlau dej kho tus neeg saib xyuas ncaj qha rau cov hlau hnyav ion-muaj cov dej khib nyiab, cov tshuaj tiv thaiv tam sim ntawd, txoj kev zoo tshaj plaws yog do txhua 10min-times;
②Rau qhov tsis paub meej ntawm cov hlau hnyav hauv cov dej khib nyiab, kev sim tshuaj yuav tsum tau siv los txiav txim seb cov hlau hnyav ntxiv.
③Rau kev kho cov dej khib nyiab uas muaj cov hlau hnyav hnyav nrog ntau qhov sib txawv, cov khoom siv raw ntxiv tuaj yeem tswj tau los ntawm ORP
2. Cov cuab yeej siv thiab cov txheej txheem thev naus laus zis
1. Pretreat cov dej 2. Txhawm rau kom tau PH = 2-7, ntxiv cov kua qaub los yog alkali los ntawm PH regulator 3. Tswj cov khoom siv raw ntxiv los ntawm redox regulator 4. Flocculant (potassium aluminium sulfate) 5. Lub sijhawm nyob. ntawm lub stirring tank 10min 76, tuav lub sij hawm ntawm agglomeration tank 10min 7, sloping phaj sedimentation tank 8, sludge 9, reservoir 10, lim 121, kawg pH tswj ntawm lub pas dej ua ke 12, tso dej
4. Kev txheeb xyuas cov txiaj ntsig kev lag luam
Kev siv cov dej khib nyiab electroplating raws li cov dej khib nyiab hnyav hnyav ua piv txwv, hauv kev lag luam no ib leeg, cov tuam txhab thov yuav ua tiav cov txiaj ntsig zoo thiab kev lag luam.Electroplating wastewater mas yog los ntawm cov dej yaug ntawm plating qhov chaw thiab ib tug me me ntawm cov txheej txheem pov tseg kua.Hom, cov ntsiab lus thiab daim ntawv ntawm cov hlau hnyav hauv cov dej khib nyiab sib txawv heev nrog ntau hom kev tsim khoom, feem ntau muaj cov hlau hnyav xws li tooj liab, chromium, zinc, cadmium, thiab nickel..Raws li kev txheeb cais tsis tiav, txhua xyoo tso dej pov tseg los ntawm kev lag luam electroplating ib leeg tshaj 400 lab tons.
Kev kho tshuaj ntawm electroplating dej khib nyiab tau lees paub tias yog txoj hauv kev zoo tshaj plaws thiab meej.Txawm li cas los xij, kev txiav txim siab los ntawm cov txiaj ntsig tau ntau xyoo, cov txheej txheem tshuaj muaj teeb meem xws li kev ua haujlwm tsis ruaj khov, kev ua haujlwm ntawm kev lag luam thiab tsis zoo ib puag ncig.Lub polymer hnyav hlau dej kho tus neeg saib xyuas yog daws tau zoo heev.Qhov teeb meem saum toj no.
4. Kev soj ntsuam zoo ntawm qhov project
1. Nws muaj peev xwm txo qis CrV, pH ntau ntawm kev txo Cr" yog dav (2 ~ 6), thiab feem ntau ntawm lawv yog acidic me ntsis.
Cov dej khib nyiab sib xyaw tuaj yeem tshem tawm qhov xav tau ntxiv cov kua qaub.
2. Nws muaj zog alkaline, thiab tus nqi pH tuaj yeem nce ntxiv rau tib lub sijhawm nws ntxiv.Thaum pH nce mus txog 7.0, Cr (VI), Cr3+, Cu2+, Ni2+, Zn2+, Fe2+, thiab lwm yam tuaj yeem ncav cuag tus qauv, uas yog, cov hlau hnyav tuaj yeem raug precipitated thaum txo tus nqi VI.Cov dej kho tau ua tau raws li lub teb chaws thawj-chav tawm tus qauv
3. Tus nqi qis.Piv nrog rau cov tshuaj sodium sulfide, cov nqi ua haujlwm raug txo los ntawm ntau dua RMB 0.1 ib tuj.
4. Kev ua haujlwm ceev ceev, thiab kev tiv thaiv ib puag ncig yog qhov ua tau zoo.Cov nag lossis daus yog ib qho yooj yim rau kev daws, uas yog ob zaug sai dua li cov txiv qaub txoj kev.Ib txhij nag lossis daus ntawm F-, P043 hauv dej khib nyiab
5. Tus nqi ntawm cov sludge yog me me, tsuas yog ib nrab ntawm cov tsoos tshuaj los nag txoj kev
6. Tsis muaj cov pa phem thib ob ntawm cov hlau hnyav tom qab kev kho mob, thiab ib txwm siv tooj liab carbonate yooj yim rau hydrolyze;
7. Tsis muaj clogging lub lim ntaub, nws tuaj yeem ua tiav tas li
Qhov chaw ntawm tsab xov xwm no: Sina Aiwen qhia cov ntaub ntawv
Post lub sij hawm: Nov-29-2021