Ntawm cov dej khib nyiab hauv kev lag luam, cov dej khib nyiab luam ntawv thiab zas xim yog ib qho ntawm cov dej khib nyiab uas nyuaj kho tshaj plaws. Nws muaj cov khoom sib xyaw ua ke, cov nqi chroma siab, cov concentration siab, thiab nyuaj rau degrade. Nws yog ib qho ntawm cov dej khib nyiab loj tshaj plaws thiab nyuaj kho uas ua rau ib puag ncig puas tsuaj. Kev tshem tawm cov chroma yog qhov nyuaj dua ntawm cov teeb meem.
Ntawm ntau txoj kev kho dej khib nyiab luam ntawv thiab zas xim, kev siv cov coagulation yog txoj kev siv dav tshaj plaws hauv cov lag luam. Tam sim no, cov flocculants ib txwm siv hauv kev luam ntawv thiab zas xim hauv kuv lub tebchaws yog cov flocculants ua los ntawm txhuas thiab hlau. Cov nyhuv decolorization tsis zoo, thiab yog tias cov xim reactive raug decolorized, yuav luag tsis muaj cov nyhuv decolorization, thiab tseem yuav muaj cov hlau ions hauv cov dej kho, uas tseem ua rau tib neeg lub cev thiab ib puag ncig puas tsuaj.
Dicyandiamide formaldehyde resin decoloring agent yog ib qho organic polymer flocculant, hom ntsev quaternary ammonium. Piv nrog rau cov tshuaj flocculants decolorizing ib txwm muaj, nws muaj qhov ceev flocculation, tsawg dua koob tshuaj, thiab cuam tshuam los ntawm cov ntsev sib xyaw, PH thiab cov txiaj ntsig xws li tsawg dua qhov kub thiab txias.
Tus neeg sawv cev dicyandiamide formaldehyde resin decoloring yog ib qho flocculant feem ntau siv rau kev tshem tawm xim thiab COD. Thaum siv nws, nws raug pom zoo kom kho qhov pH ntawm cov dej khib nyiab kom nruab nrab. Thov sib txuas lus nrog cov kws tshaj lij rau cov txheej txheem siv tshwj xeeb. Raws li ntau qhov kev koom tes Cov lus tawm tswv yim los ntawm cov chaw tsim khoom luam ntawv thiab zas xim yog tias dicyandiamide formaldehyde resin decolorizer muaj cov nyhuv tseem ceeb rau kev tshem tawm xim ntawm kev luam ntawv thiab zas xim dej khib nyiab. Tus nqi tshem tawm chroma tuaj yeem ncav cuag ntau dua 96%, thiab tus nqi tshem tawm ntawm COD kuj tau ncav cuag ntau dua 70%.
Cov tshuaj flocculants polymer organic tau siv thawj zaug hauv xyoo 1950, feem ntau yog cov tshuaj flocculants polyacrylamide, thiab polyacrylamide tuaj yeem muab faib ua non-ionic, anionic, thiab cationic. Hauv tsab xov xwm no, peb yuav nkag siab txog acrylamide polymer dicyandiamide formaldehyde resin decolorizing flocculant uas tau salted nrog quaternary amine ntawm cov cationic organic polymer flocculants.
Cov dicyandiamide formaldehyde resin decolorizing flocculant yog thawj zaug reacted nrog acrylamide thiab formaldehyde aqueous solution nyob rau hauv alkaline mob, ces reacted nrog dimethylamine, thiab ces txias thiab quaternized nrog hydrochloric acid. Cov khoom yog concentrated los ntawm evaporation thiab lim kom tau txais quaternized acrylamide monomer.
Cov tshuaj dicyandiamide-formaldehyde condensation polymer decolorizing flocculant tau qhia tawm xyoo 1990. Nws muaj cov txiaj ntsig tshwj xeeb zoo heev ntawm kev tshem tawm cov xim ntawm cov dej khib nyiab. Hauv kev kho cov dej khib nyiab uas muaj xim ntau thiab cov dej khib nyiab uas muaj ntau, tsuas yog siv polyacrylamide lossis polyacrylamide xwb. Polyaluminum chloride flocculant tsis tuaj yeem tshem tawm cov xim tag nrho, thiab tom qab ntxiv cov tshuaj decolorizing flocculant, nws neutralizes cov nqi tsis zoo uas txuas nrog cov xim hauv cov dej khib nyiab los ntawm kev muab ntau cov cations thiab yog li ua rau tsis ruaj khov. Thaum kawg, ntau cov floccules raug tsim, uas tuaj yeem nqus cov xim tom qab flocculation thiab destabilization, yog li ua tiav lub hom phiaj ntawm decolorization.
Yuav siv cov tshuaj decolorizer li cas:
Txoj kev siv cov tshuaj flocculant uas ua rau cov xim ploj mus zoo ib yam li polyacrylamide. Txawm hais tias tus thawj yog cov kua, nws yuav tsum tau diluted ua ntej nws siv tau. Lub chaw tsim khoom pom zoo kom nws yuav tsum tau diluted los ntawm 10% -50%, thiab tom qab ntawd ntxiv rau cov dej khib nyiab thiab do kom tag. Ua paj alum. Cov xim hauv cov dej khib nyiab uas muaj xim yog flocculated thiab precipitated tawm ntawm dej, thiab muaj nruab nrog sedimentation lossis cua flotation kom ua tiav kev sib cais.
Hauv kev luam ntawv thiab zas xim, textile thiab lwm yam lag luam, kev siv dej ntau heev thiab tus nqi rov siv dua tsawg. Yog li ntawd, kev pov tseg ntawm cov peev txheej dej yog qhov tshwm sim ntau heev. Yog tias cov txheej txheem no siv los ua kev kho mob siab heev thiab rov ua dua cov dej khib nyiab muaj xim siab thiab muaj zog no, nws tsis tsuas yog txuag tau ntau cov peev txheej dej tshiab hauv kev lag luam xwb, tab sis nws kuj tseem tuaj yeem txo qhov tso tawm ntawm cov dej khib nyiab hauv kev lag luam, uas yog qhov tseem ceeb thiab tseem ceeb rau kev txhawb nqa kev txhim kho kev lag luam luam ntawv, zas xim thiab textile.
Tau txais los ntawm EasyBuy.
Lub sijhawm tshaj tawm: Kaum Ib Hlis-16-2021