Thaum xav txog kojKev kho dej khib nyiabtxheej txheem, pib los ntawm kev txiav txim siab dab tsi koj yuav tsum tau tshem tawm ntawm cov dej thiaj li ua tau raws li qhov yuav tsum tau tso tawm.Nrog kev kho tshuaj kom raug, koj tuaj yeem tshem tawm cov ions thiab cov khoom me me ntawm cov dej, nrog rau cov khib nyiab tshem tawm.Cov tshuaj siv hauv cov chaw kho dej phwj tuaj feem ntau suav nrog: pH regulator, coagulant,flocculant.
Flocculant
Flocculants yog siv nyob rau hauv ntau yam kev lag luam thiab kev siv los pab tshem tawm cov khib nyiab pov tseg los ntawm kev tsom cov pa phem rau hauv cov ntawv los yog "flocs" uas ntab saum npoo los yog nyob hauv qab.Lawv kuj tuaj yeem siv los ua kom cov txiv qaub, mloog zoo sludge thiab dehydrate cov khib nyiab.Ntuj los yog ntxhia flocculants muaj xws li nquag silica thiab polysaccharides, thaum hluavtaws flocculants feem ntaupolyacrylamide.
Nyob ntawm tus nqi thiab tshuaj muaj pes tsawg leeg ntawm cov dej khib nyiab, flocculants yuav siv tau ib leeg lossis ua ke nrog cov coagulants.Flocculants txawv ntawm coagulantsnyob rau hauv hais tias lawv feem ntau yog polymers, whereas coagulants feem ntau yog ntsev.Lawv qhov loj me me (qhov hnyav) thiab qhov hnyav (feem pua ntawm cov molecules nrog cov nqi anionic lossis cationic) tuaj yeem sib txawv rau "sib npaug" tus nqi ntawm cov khoom hauv dej thiab ua rau lawv ua ke ua ke thiab lub cev qhuav dej.Feem ntau, anionic flocculants yog siv los cuab cov pob zeb hauv av, thaum cationic flocculants yog siv los cuab cov organic hais.
PH tus tswj
Txhawm rau tshem tawm cov hlau thiab lwm yam dej paug tawm ntawm cov dej khib nyiab, lub pH regulator tuaj yeem siv tau.Los ntawm kev nce cov pH ntawm cov dej, thiab yog li nce tus naj npawb ntawm cov hydroxide ions tsis zoo, qhov no yuav ua rau cov hlau ions zoo rau kev sib txuas nrog cov tsis zoo hydroxide ions.Qhov no ua rau cov lim tawm ntawm cov khoom ntom ntom thiab insoluble hlau.
Coagulant
Rau txhua txoj kev kho dej khib nyiab uas kho cov khib nyiab tshem tawm, coagulants tuaj yeem sib sau cov kab mob tshem tawm kom yooj yim tshem tawm.Cov tshuaj coagulants siv rau pretreatment ntawm industrial wastewater yog muab faib ua ib tug ntawm ob pawg: organic thiab inorganic.
Inorganic coagulants yog tus nqi-zoo thiab tuaj yeem siv rau ntau yam kev siv.Lawv muaj txiaj ntsig tshwj xeeb tiv thaiv cov dej nyoos ntawm qhov tsis tshua muaj turbidity, thiab daim ntawv thov no tsis haum rau cov organic coagulants.Thaum ntxiv rau dej, inorganic coagulants los ntawm txhuas los yog hlau precipitate, absorbing impurities nyob rau hauv dej thiab purifying nws.Qhov no yog hu ua "sweep-and-flocculate" mechanism.Thaum ua tau zoo, cov txheej txheem nce tag nrho cov sludge uas yuav tsum tau muab tshem tawm ntawm cov dej.Feem ntau inorganic coagulants muaj xws li txhuas sulfate, txhuas chloride, thiab ferric sulfate.
Organic coagulants muaj qhov zoo ntawm kev siv tsawg, me me sludge ntau lawm thiab tsis cuam tshuam rau pH ntawm cov dej kho.Piv txwv ntawm cov organic coagulants muaj xws li polyamines thiab polydimethyl diallyl ammonium chloride, nrog rau melamine, formaldehyde thiab tannins.
peb cov kab ntawm flocculants thiab coagulants yog tsim los txhim kho cov dej khib nyiab thiab txo tus nqi tag nrho ntawm ntau yam kev siv cov ntxhia, ua kom tau raws li qhov kev thov rau cov tshuaj kho dej hauv ntau yam kev thov.
Post lub sij hawm: Feb-15-2023