Dej phwj yog cov dej khib nyiab hauv kev tsim khoom thiab lub neej, uas muaj ntau cov organic thiab inorganic tshuaj. Yog tias nws raug tso tawm ncaj qha yam tsis muaj kev kho mob, nws yuav muaj kev cuam tshuam zoo rau ib puag ncig thiab tib neeg kev noj qab haus huv. Yog li ntawd, kev kho dej phwj tuaj ib txwm yog qhov tseem ceeb thiab nyuaj ntawm tib neeg txoj kev mloog, thiab polyacrylamide yog ib tus neeg sawv cev pabcuam zoo los daws cov teeb meem nyuaj rau cov neeg hauv kev kho dej phwj tuaj.
Polyacrylamide (PAM)yog ib qho hluavtaws polymer uas ua lub luag haujlwm tseem ceeb hauv ntau yam kev lag luam nrog rau kev kho dej khib nyiab. Nws cov khoom tshwj xeeb tso cai rau nws kom tshem tawm cov pa phem thiab impurities los ntawm dej, pab ntxuav cov dej khib nyiab ua ntej nws tawm rov qab rau hauv ib puag ncig. Nws tuaj yeem siv dav hauv ntau qhov chaw, xws li kev kho dej, kev sib koom ua ke hauv av, roj extraction, thiab lwm yam. Cov hauv qab no yog cov ncauj lus kom ntxaws txog lub luag haujlwm ntawm polyacrylamide hauv kev kho dej khib nyiab:
1. Coagulation thiab flocculation:
Coagulation thiab flocculation yog cov txheej txheem tseem ceeb hauv kev kho dej khib nyiab uas cuam tshuam nrog kev ua kom tsis muaj zog thiab sib sau ua ke ntawm cov teeb meem raug tshem tawm thiab colloidal los ua cov khoom loj dua hu ua flocs. Polyacrylamides yog siv los ua flocculants thiab coagulants hauv cov txheej txheem no. Nws pab khi ua ke cov khoom zoo uas yuav txwv tsis pub nyob hauv kev ncua, ua rau lawv yooj yim dua los daws. Qhov no txhim kho kev tshem tawm cov khib nyiab, cov organic thiab qee cov hlau hnyav hauv cov dej khib nyiab.
2. Txhim khu kev sib cais-kua kua:
Polyacrylamide txhim khu kev ua tau zoo ntawm cov kua-kua sib cais txoj kev xws li sedimentation thiab centrifugation. Los ntawm kev ntxiv PAM rau cov dej khib nyiab, kev tsim cov flocs loj dua tuaj yeem txhawb nqa. Cov flocs no daws sai dua thiab ua tau zoo dua, txo cov sij hawm xav tau thiab ua kom pom tseeb ntawm cov dej kho.
3. Sludge dewatering:
Hauv kev kho dej khib nyiab, sludge yog cov khoom siv los ntawm ntau yam txheej txheem. Polyacrylamide kuj tseem siv tau los pab sludge dewatering. Thaum ntxiv rau sludge, nws khi cov khoom ua ke los tsim cov agglomerates loj. Qhov no txhim kho cov kua dej thiab ua kom cov ntsiab lus ntawm cov dej dewatered sludge, txo qhov ntim ntawm sludge uas yuav tsum tau muab pov tseg.
4. Kev pab lim:
Polyacrylamide yog qee zaum siv los ua kev lim dej los txhim kho kev ua haujlwm ntawm cov txheej txheem pom xws li cov xuab zeb lim lossis cov lim dej ntau. Nws pab ntes cov khoom me me uas yuav dhau los ntawm cov xov xwm lim dej, txhim kho cov dej zoo.
5. Kev hloov kho pH thiab tshuaj lom neeg cov tshuaj tiv thaiv:
Polyacrylamide tuaj yeem siv ua ke nrog lwm cov tshuaj los kho cov pH ntawm cov dej khib nyiab. Kev tswj pH yog qhov tseem ceeb vim tias nws cuam tshuam rau kev ua haujlwm ntawm coagulation thiab flocculation txheej txheem. Tsis tas li ntawd, PAMs tuaj yeem pab ua ntau yam tshuaj tiv thaiv, suav nrog nag lossis daus ntawm qee yam ions thiab tshem tawm cov pa phem tshwj xeeb.
6. Txo kev cuam tshuam ib puag ncig:
Kev siv cov polyacrylamide hauv kev kho dej khib nyiab tuaj yeem tshem tawm cov pa phem ntau dua thiab ua tau zoo, thiab thaum kawg txo qhov cuam tshuam ntawm cov dej khib nyiab tawm ntawm ib puag ncig. Cov dej huv uas tso rau hauv ib puag ncig tuaj yeem txo qis kev puas tsuaj rau cov dej hauv dej thiab tiv thaiv tib neeg kev noj qab haus huv.
Nws yog tsim nyog sau cia tias txawm hais tias polyacrylamide muaj ntau yam zoo hauv kev kho dej khib nyiab, nws daim ntawv thov yuav tsum tau ua tib zoo tswj. Kev siv tsis raug lossis ntau dhau ntawm PAM tuaj yeem cuam tshuam rau ib puag ncig tsis zoo vim tias cov polymers lawv tus kheej tuaj yeem nyob hauv ib puag ncig thiab tuaj yeem ua rau muaj kuab paug hauv dej. Yog li ntawd, kev siv nws yuav tsum tau ua raws li kev soj ntsuam nruj me ntsis, kev tswj cov koob tshuaj, thiab ua raws li cov txheej txheem tswj hwm.
Yog tias koj xav tau polyacrylamide, thov koj xav tiv tauj peb!