Flocculantfeem ntau hu ua "industrial panacea", uas muaj ntau yam kev siv. Raws li ib tug txhais tau tias ntawm kev ntxiv dag zog-kua sib cais nyob rau hauv lub tshav pob ntawm kev kho dej, nws yuav siv tau los ntxiv dag zog rau cov thawj los nag los ntawm cov dej phwj tuaj, flotation kev kho mob thiab theem nrab nag lossis daus tom qab activated sludge txoj kev. Nws kuj tseem siv tau rau kev kho mob tertiary lossis kev kho mob siab heev ntawm cov dej phwj tuaj. Hauv kev kho dej, feem ntau muaj qee yam cuam tshuam rau cov nyhuv coagulation (cov tshuaj siv tshuaj), cov yam ntxwv no yog qhov nyuaj, nrog rau cov dej kub, pH tus nqi thiab alkalinity, qhov xwm txheej thiab qhov concentration ntawm impurities hauv dej, kev txuag dej sab nraud, thiab lwm yam. .
1. Kev cuam tshuam ntawm dej kub
Cov dej kub muaj qhov cuam tshuam loj rau kev siv tshuaj, thiab dej kub tsis tshua muaj nyob rau lub caij ntuj no
muaj kev cuam tshuam ntau dua rau kev siv tshuaj, uas feem ntau ua rau qeeb tsim ntawm flocs nrog cov khoom zoo thiab xoob. Cov laj thawj tseem ceeb yog:
Lub hydrolysis ntawm inorganic ntsev coagulants yog cov tshuaj tiv thaiv endothermic, thiab hydrolysis ntawm cov dej kub tsis tshua muaj coagulants yog qhov nyuaj.
Lub viscosity ntawm cov dej tsis kub yog qhov loj, uas ua rau lub Brownian tsis muaj zog ntawm impurity hais nyob rau hauv
cov dej thiab txo txoj kev sib tsoo, uas tsis yog qhov tsim nyog rau kev ua kom tsis muaj zog thiab sib sau ua ke ntawm colloids thiab cuam tshuam rau kev loj hlob ntawm flocs.
Thaum cov dej kub qis, cov dej ntawm cov khoom colloidal yog txhim kho, uas cuam tshuam cov cohesion ntawm colloidal hais, thiab tseem cuam tshuam rau lub zog adhesion ntawm cov colloidal hais.
Cov dej kub yog cuam tshuam nrog pH ntawm cov dej. Thaum cov dej kub qis, pH tus nqi ntawm cov dej nce ntxiv, thiab qhov zoo tshaj pH tus nqi rau coagulation yuav nce ntxiv. Yog li ntawd, nyob rau lub caij ntuj no nyob rau hauv cov cheeb tsam txias, nws yog ib qhov nyuaj kom tau ib tug zoo coagulation nyhuv txawm yog hais tias ib tug loj npaum li cas ntawm coagulant ntxiv.
2. pH thiab Alkalinity
Tus nqi pH yog qhov qhia txog seb cov dej puas yog acidic lossis alkaline, uas yog hais tias, qhov ntsuas ntawm H + concentration hauv dej. Tus nqi pH ntawm cov dej nyoos ncaj qha cuam tshuam rau cov tshuaj tiv thaiv hydrolysis ntawm cov coagulant, uas yog, thaum pH tus nqi ntawm cov dej nyoos yog nyob rau hauv ib qho kev sib txawv, cov nyhuv coagulation tuaj yeem lav tau.
Thaum cov coagulant ntxiv rau hauv dej, H + concentration hauv dej nce vim yog hydrolysis ntawm coagulant, uas ua rau pH tus nqi ntawm cov dej poob thiab cuam tshuam cov hydrolysis. Txhawm rau kom pH nyob rau hauv qhov kev pom zoo, cov dej yuav tsum muaj cov tshuaj alkaline txaus kom tsis txhob muaj H +. Cov dej ntuj muaj qee qhov alkalinity (feem ntau HCO3-), uas tuaj yeem ua rau H + tsim tawm thaum lub sij hawm hydrolysis ntawm coagulant, thiab muaj cov nyhuv buffering ntawm tus nqi pH. Thaum cov alkalinity ntawm cov dej nyoos tsis txaus lossis cov coagulant ntxiv ntau dhau lawm, pH tus nqi ntawm cov dej yuav poob qis, ua rau cov nyhuv coagulation.
3. Kev cuam tshuam ntawm qhov xwm thiab concentration ntawm impurities hauv dej
Qhov loj me me thiab kev them nqi ntawm SS hauv dej yuav cuam tshuam rau cov nyhuv coagulation. Feem ntau hais lus, particle txoj kab uas hla yog me me thiab sib xws, thiab cov nyhuv coagulation tsis zoo; cov particle concentration hauv dej yog tsawg, thiab qhov tshwm sim ntawm particle sib tsoo me me, uas tsis zoo rau coagulation; Thaum lub turbidity loj, thiaj li yuav destabilize lub colloid nyob rau hauv cov dej, qhov yuav tsum tau cov tshuaj noj yuav tsum tau zoo heev. Thaum muaj cov organic teeb meem loj hauv dej, nws tuaj yeem raug adsorbed los ntawm cov av nplaum, yog li hloov cov yam ntxwv saum npoo ntawm cov khoom qub colloidal, ua rau cov khoom colloidal ruaj khov, uas yuav cuam tshuam rau coagulation nyhuv. Lub sijhawm no, oxidant yuav tsum tau ntxiv rau hauv dej kom rhuav tshem cov nyhuv ntawm cov organic teeb meem, txhim kho cov nyhuv coagulation.
Cov ntsev yaj hauv dej kuj tuaj yeem cuam tshuam cov nyhuv coagulation. Piv txwv li, thaum muaj ntau cov calcium thiab magnesium ions muaj nyob rau hauv cov dej ntuj, nws yog conducive rau coagulation, thaum ib tug loj npaum li cas ntawm Cl- tsis yog conducive rau coagulation. Thaum lub caij dej nyab, cov dej turbidity siab uas muaj ntau cov humus nkag rau hauv cov nroj tsuag vim yog cov dej los nag, thiab cov tshuaj ua ntej chlorination thiab coagulant feem ntau yog siv los ntawm qhov no.
4. Kev cuam tshuam ntawm kev txuag dej sab nraud
Cov xwm txheej yooj yim rau kev sib sau ua ke ntawm colloidal hais yog kom destabilize cov colloidal hais, thiab ua kom cov destabilized colloidal hais sib tsoo. Lub luag haujlwm tseem ceeb ntawm cov coagulant yog ua kom tsis muaj zog ntawm cov colloidal hais, thiab cov hydraulic agitation sab nraud yog los xyuas kom meej tias cov colloidal hais tuaj yeem hu rau cov coagulant, kom cov colloidal hais sib tsoo nrog ib leeg los tsim flocs.
Txhawm rau ua kom cov colloidal particles sib cuag nrog cov coagulant, cov coagulant yuav tsum tau sai sai thiab uniformly dispersed nyob rau hauv tag nrho cov qhov chaw ntawm lub cev dej tom qab lub coagulant muab tso rau hauv dej, feem ntau hu ua ceev sib tov, uas yuav tsum tau nyob rau hauv 10 mus rau 30. vib nas this thiab tsis ntau tshaj 2 feeb.
5. Kev cuam tshuam ntawm dej cuam tshuam load
Kev poob siab dej yog hais txog cov dej tsis tu ncua lossis tsis yog lub caij nyoog ntawm cov dej nyoos, uas tam sim ntawd hloov pauv ntau heev. Kev siv dej hauv nroog ntawm cov dej ua haujlwm thiab kev hloov pauv ntawm cov dej ntws ntws tawm yuav cuam tshuam rau cov dej nkag mus rau hauv cov nroj tsuag, tshwj xeeb tshaj yog nyob rau lub caij nplooj ntoo hlav thaum lub caij ntuj sov, uas ua rau cov dej nkag mus rau hauv cov nroj tsuag hloov pauv ntau, uas ua rau muaj kev hloov pauv ntau npaum li cas. ntawm cov tshuaj. Thiab cov nyhuv dej tom qab tso dej tsis zoo heev. Nws yog tsim nyog sau cia tias qhov kev hloov pauv no tsis nce linearly. Tom qab ntawd, ua tib zoo saib xyuas cov alum nyob rau hauv cov tshuaj tiv thaiv tank, thiaj li tsis mus rhuav tshem cov coagulation nyhuv vim ntau npaum li cas.
6. Flocculanttxuag kev ntsuas
Ntxiv nrog rau cov xwm txheej saum toj no, kuj tseem muaj qee qhov kev txuag tshuaj, xws li nce tus naj npawb ntawm lub sijhawm nplawm hauv lub pas dej ua kua, txo cov nag lossis daus ntawm cov khoom siv tshuaj, stabilizing cov tshuaj, thiab txuag cov tshuaj noj.
Yog tias polyacrylamide xav txuag cov nqi hauv kev siv, nws yog ib qho tsim nyog los xaiv cov qauv tsim nyog. Lub hauv paus ntsiab lus yog xaiv cov polyacrylamide nrog cov txiaj ntsig kev kho mob zoo tshaj plaws, tus nqi kim tsis tas yuav yog qhov zoo tshaj plaws, thiab tsis txhob sim pheej yig kom ua rau cov dej khib nyiab tsis zoo, tab sis nce nqi. Xaiv tus neeg sawv cev uas tsis yog tsuas yog txo cov dej noo ntawm cov sludge, tab sis kuj txo qis qhov ntau npaum ntawm tus neeg sawv cev ntawm chav tsev. Ua cov kev sim flocculation ntawm cov qauv tshuaj, xaiv ob lossis peb hom tshuaj uas muaj kev sim zoo, thiab tom qab ntawd ua cov kev sim ntawm lub tshuab raws li kev soj ntsuam cov av nkos zaum kawg thiab txiav txim siab hom tshuaj kawg.
Polyacrylamide feem ntau yog cov khoom siv. Nws yuav tsum tau npaj rau hauv ib qho kev daws teeb meem nrog ib qho kev solubility. Qhov concentration yog feem ntau ntawm 0.1% thiab 0.3%. Cov concentrated los yog nyias dhau lawm yuav cuam tshuam rau cov nyhuv, nkim tshuaj, nce nqi, thiab yaj cov granular polymerization. Cov dej rau cov khoom yuav tsum huv si (xws li dej kais dej), tsis yog dej phwj tuaj. Dej ntawm chav tsev kub txaus, feem ntau tsis tas yuav tsum muaj cua sov. Thaum cov dej kub qis dua 5 ° C, qhov kev sib cais qeeb heev, thiab qhov kev sib cais nrawm nrawm thaum cov dej kub nce. Tab sis saum toj no 40 ℃ yuav ua rau kom qhov degradation ntawm cov polymer thiab cuam tshuam rau kev siv. Feem ntau, kais dej yog tsim rau kev npaj cov tshuaj polymer. Muaj zog acid, muaj zog alkali, siab ntsev dej tsis haum rau kev npaj.
Ua tib zoo saib lub sijhawm kho hauv kev npaj ntawm tus neeg sawv cev, kom tus neeg sawv cev tuaj yeem yaj tag nrho hauv dej thiab tsis agglomerated, txwv tsis pub nws yuav tsis tsuas yog ua rau pov tseg, tab sis kuj cuam tshuam cov nyhuv ntawm cov av nkos. Cov ntaub lim dej thiab cov raj xa dej kuj tuaj yeem ua rau txhaws, ua rau rov ua cov khoom pov tseg. Thaum tsim los rau hauv kev daws teeb meem, lub sijhawm cia yog txwv. Feem ntau hais lus, thaum cov tshuaj concentration yog 0.1%, cov tshuaj uas tsis yog-anionic polymer yuav tsum tsis pub tshaj ib lub lim tiam, thiab cov tshuaj cationic polymer yuav tsum tsis pub tshaj ib hnub.
Tom qab kev npaj ntawm tus neeg sawv cev, thaum lub sij hawm noj cov tshuaj, xyuam xim rau qhov kev hloov ntawm cov av nkos zoo thiab cov nyhuv ntawm cov av nkos, thiab kho cov tshuaj ntawm tus neeg sawv cev nyob rau hauv lub sij hawm kom ua tau ib tug zoo dua koob tshuaj piv.
Cov tshuaj yuav tsum tau muab cia rau hauv ib lub warehouse qhuav, thiab lub hnab tshuaj yuav tsum tau muab kaw. Hauv kev siv, siv ntau npaum li qhov ua tau, thiab kaw cov tshuaj tsis siv kom tsis txhob ya raws. Hauv kev npaj cov tshuaj, kev saib xyuas yuav tsum tsis txhob teeb tsa ntau li ntau tau, thiab cov kua dej uas tau muab tso rau lub sijhawm ntev yog yooj yim hydrolyzed thiab siv tsis tau lawm.
Cov cuab yeej siv tau zoo, cov neeg ua haujlwm tau nyiaj tshwj xeeb, thiab cov kev pab cuam tom qab muag zoo dua; Peb kuj yog ib tsev neeg loj sib koom ua ke, leej twg nyob nrog lub koom haum muaj txiaj ntsig "kev sib koom ua ke, kev txiav txim siab, kev ua siab ntev" rau Quots rauPolyacrylamideFlocculamide Anionic Cationic Nonionic Water Treatment Polyacrylamide, Peb sov siab txais tos cov phooj ywg los ntawm txhua qhov chaw ntawm kev ua neej nyob niaj hnub mus yos hav zoov kev sib koom tes thiab tsim kom muaj kev ci ntsa iab thiab zoo nkauj tag kis. "polyelectrolyte"
Quots rau Tuam Tshoj tshuaj thiab dej khib nyiab kho, Nrog lub zog muaj zog thiab txhim khu kev qha credit, peb tau nyob ntawm no los pab peb cov neeg siv khoom los ntawm kev muab cov khoom zoo tshaj plaws thiab kev pabcuam, thiab peb ua tsaug rau koj txoj kev txhawb nqa. Peb yuav sim ua kom peb lub koob npe nrov ua tus muag khoom zoo tshaj plaws hauv ntiaj teb. Yog tias koj muaj lus nug lossis lus nug, koj yuav tsumtiv tauj pebywj siab.
Post lub sij hawm: Nov-04-2022