Sludge dehydration yog ib feem tseem ceeb ntawm cov txheej txheem dej phwj tuaj. Nws lub hom phiaj yog kom tshem tawm cov dej hauv cov sludge kom zoo, kom cov sludge tsawg dua, thiab cov nqi pov tseg thiab thaj av tau txo. Hauv cov txheej txheem no, kev xaiv ntawmFlocculantyog tus yuam sij, thiab PolyDADMAC, raws li qhov ua tau zooCationic Polymer flocculant, tab tom ua lub luag haujlwm tseem ceeb.
Ua ntej, peb yuav tsum to taub qhov muaj pes tsawg leeg thiab cov khoom ntawm sludge. Sludge feem ntau yog cov khoom khib nyiab uas tsim thaum lub sij hawm kho dej phwj. Nws muaj cov khoom sib xws xws li cov khib nyiab organic, pawg microbial, inorganic hais thiab colloids. Cov khib nyiab tshem tawm hauv cov sludge yog qhov tsis zoo thiab ua rau ib leeg, thaum dej puv nruab nrab ntawm cov khib nyiab, yog li thawj cov dej ntawm cov sludge tuaj yeem ncav cuag 95%. ua paug rau ib puag ncig. Yog li ntawd, yuav ua li cas ua tau zoo sludge dewatering tau dhau los ua qhov teeb meem tseem ceeb hauv kev kho dej phwj tuaj.
Hauv cov txheej txheem sludge dewatering,Flocculants rau sludge dewateringyog ib qho tseem ceeb cuam tshuam. Lub flocculant aggregates cov me me hauv cov sludge rau hauv cov khoom loj dua los ntawm hluav taws xob neutralization, adsorption bridging, thiab lwm yam, accelerating nws sedimentation thiab lub cev qhuav dej txheej txheem. Raws li cov khoom siv tshuaj tshwj xeeb siv hauv kev kho dej khib nyiab thiab sludge lub cev qhuav dej, PolyDADMAC ua tau zoo hauv sludge lub cev qhuav dej vim nws cov qauv molecular tshwj xeeb thiab cov nqi ceev.
Cov qauv molecular ntawm PolyDADMAC muab nws cov nqi siab ceev thiab zoo heev adsorption zog. Thaum lub sij hawm sludge dehydration txheej txheem, PolyDADMAC tuaj yeem sai sai adsorb rau ntawm qhov chaw ntawm sludge hais, txo lub zog quab yuam ntawm cov khoom los ntawm hluav taws xob neutralization, thiab txhawb kev tsim cov flocs loj ntawm cov khoom. Nyob rau tib lub sijhawm, cov saw hlau molecular ntawm PolyDADMAC tseem tuaj yeem tsim cov qauv siv tau zoo, txhawm rau ntau cov sludge hais ua ke, nyem dej tawm ntawm nruab nrab ntawm cov sludge hais, thiab tsim cov clumps uas yooj yim rau lub cev qhuav dej, kom cov dej ntim tuaj yeem txo. mus txog 60-80% lossis qis dua, thiab qhov ntim tuaj yeem txo los ntawm 75-87%.
Piv nrog rau cov tsoos inorganic flocculants, PolyDADMAC muaj qhov hnyav dua molecular thiab nqi ceev, muab nws muaj zog flocculation muaj peev xwm. Ntxiv rau,PolyDADMACmuaj kev ua haujlwm zoo heev, yooj yim siv, thiab tsis tsim cov pa phem thib ob. PD nws tus kheej tsis tsim cov sedimentation zoo li alum, yog li tus nqi ntawm cov sludge ntxiv tuaj yeem raug txo.Cov txiaj ntsig no ua rau PolyDADMAC muaj kev thov dav dav hauv thaj chaw ntawm sludge dewatering.
Cov qauv molecular ntawm PolyDADMAC muab nws cov nqi siab ceev thiab zoo heev adsorption zog. Ntau pawg cationic ntawm nws cov saw molecular tuaj yeem hnov mob nrog anionic pawg nyob rau saum npoo ntawm sludge hais los tsim cov ionic bonds ruaj khov, ua rau muaj zog adsorption. Qhov no adsorption tsis tsuas yog pab txo cov repulsion ntawm cov khoom, tab sis kuj pab tsim flocs loj.
Ntxiv nrog rau cov qauv molecular thiab nqi zog ntawm PolyDADMAC, nws cov concentration thiab ntau npaum li cas kuj tseem ceeb cuam tshuam rau cov nyhuv sludge dehydration. Nyob rau hauv ib tug tej yam ntau yam, raws li cov concentration ntawm PolyDADMAC nce los yog ntau npaum li cas, lub dewatering kev ua tau zoo ntawm sludge tuaj yeem txhim kho. Txawm li cas los xij, kev siv ntau dhau los yog ntau npaum li cas yuav ua rau muaj qhov cuam tshuam tsis zoo, uas ua rau muaj kev tiv thaiv colloid, uas ua rau txo cov dej ntws tawm. Yog li ntawd, nyob rau hauv cov ntaub ntawv siv, kev ntsuam xyuas thiab optimization yuav tsum tau ua raws li cov kev kho dej phwj system thiab sludge zog los txiav txim qhov zoo PolyDADMAC concentration thiab ntau npaum.
Post lub sij hawm: Sep-26-2024