Xu Darong 1,2, Zhang Zhongzhi 2, Jiang Hao 1, Ma Zhigang 1
(1. Beijing Guoneng Zhongdian zog txuag thiab Environmental Protection Technology Co., Ltd., Beijing 100022; 2. Tuam Tshoj University of Petroleum (Beijing), Beijing 102249)
Paub meej: Hauv kev kho cov dej khib nyiab thiab cov khib nyiab pov tseg, PAC thiab PAM tau siv dav los ua cov flocculants thiab coagulant pab. Daim ntawv no qhia txog cov txiaj ntsig ntawm daim ntawv thov thiab kev tshawb fawb ntawm pac-pam hauv ntau qhov chaw, piav qhia luv luv txog kev nkag siab thiab kev xav ntawm cov kws tshawb fawb sib txawv ntawm kev sib xyaw ua ke ntawm pac-pam, thiab soj ntsuam cov kev xav tau ntawm daim ntawv thov thiab cov hauv paus ntsiab lus ntawm pac-pam nyob rau hauv cov kev sim sib txawv. thiab teb tej yam kev mob. Raws li cov ntsiab lus thiab kev txheeb xyuas cov txiaj ntsig ntawm kev tshuaj xyuas, daim ntawv no taw qhia cov ntsiab lus sab hauv ntawm pac-pam siv rau ntau yam kev ua haujlwm, thiab taw qhia tias kev sib xyaw ntawm PAC thiab PAM kuj muaj qhov tsis xws luag, thiab nws daim ntawv thov hom thiab ntau npaum li cas yuav tsum tau ua. txiav txim siab raws li qhov xwm txheej tshwj xeeb.
Cov ntsiab lus: polyaluminium chloride; Polyacrylamide; Kev kho dej; Flocculation
0 Kev Taw Qhia
Hauv kev lag luam, kev sib xyaw ua ke ntawm polyaluminium chloride (PAC) thiab polyacrylamide (PAM) los kho cov dej khib nyiab thiab cov khib nyiab zoo sib xws tau tsim cov saw hlau thev naus laus zis, tab sis nws txoj kev sib koom ua ke tsis meej, thiab qhov ntau npaum li cas rau kev ua haujlwm sib txawv hauv txawv teb kuj txawv.
Daim ntawv no tau txheeb xyuas ntau yam ntawm cov ntaub ntawv tseem ceeb hauv tsev thiab txawv teb chaws, sau cov txheej txheem kev sib xyaw ua ke ntawm PAC thiab PAC, thiab ua cov ntaub ntawv qhia txog ntau yam kev txiav txim siab ua ke nrog cov txiaj ntsig ntawm PAC thiab PAM hauv ntau qhov kev lag luam, uas muaj kev taw qhia tseem ceeb. rau kev tshawb fawb ntxiv hauv cov haujlwm muaj feem xyuam.
1. Kev tshawb fawb hauv tsev piv txwv ntawm pac-pam
Cov nyhuv crosslinking ntawm PAC thiab PAM yog siv nyob rau hauv txhua qhov chaw ntawm lub neej, tab sis ntau npaum li cas thiab kev txhawb nqa txoj kev kho mob yog txawv rau txawv kev ua hauj lwm thiab kev kho mob ib puag ncig.
1.1 Cov dej phwj hauv tsev thiab hauv nroog sludge
Zhao Yueyang (2013) thiab lwm tus tau sim cov nyhuv coagulation ntawm PAM raws li kev pab cuam coagulant rau PAC thiab PAFC los ntawm kev siv txoj hauv kev hauv tsev. Qhov kev sim pom tias cov nyhuv coagulation ntawm PAC tom qab PAM coagulation tau nce zoo heev.
Wang Mutong (2010) thiab lwm tus tau kawm txog kev kho mob ntawm PAC + PA ntawm cov dej phwj hauv tsev hauv ib lub nroog, thiab kawm txog kev tshem tawm COD thiab lwm yam ntsuas los ntawm kev sim orthogonal.
Lin Yingzi (2014) et al. Kawm txog kev txhim kho coagulation nyhuv ntawm PAC thiab PAM ntawm algae hauv cov nroj tsuag kho dej. Yang Hongmei (2017) et al. Kawm txog kev kho mob ntawm kev siv ua ke ntawm kimchi cov dej khib nyiab, thiab txiav txim siab tias qhov zoo tshaj pH tus nqi yog 6.
Fu Peiqian (2008) et al. Kawm txog cov txiaj ntsig ntawm kev sib xyaw flocculant siv rau rov siv dej. Los ntawm kev ntsuas qhov kev tshem tawm ntawm impurities xws li turbidity, TP, COD thiab phosphate hauv cov qauv dej, nws pom tau tias cov khoom sib xyaw flocculant muaj kev tshem tawm zoo rau txhua yam ntawm impurities.
Cao Longtian (2012) thiab lwm tus tau txais txoj hauv kev sib xyaw flocculation los daws cov teeb meem ntawm cov tshuaj tiv thaiv qeeb, lub teeb flocs thiab nyuaj rau hauv cov txheej txheem kho dej hauv Northeast Tuam Tshoj vim qhov kub thiab txias hauv lub caij ntuj no.
Liu Hao (2015) et al. Kawm txog cov txiaj ntsig kev kho mob ntawm kev sib xyaw flocculant ntawm qhov nyuaj sedimentation thiab turbidity txo ncua kev ncua hauv cov dej phwj hauv tsev, thiab pom tias ntxiv qee qhov nyiaj ntawm PAM flocculate thaum ntxiv PAM thiab PAC tuaj yeem txhawb kev kho mob kawg.
1.2 luam ntawv thiab dyeing dej khib nyiab thiab papermaking khib nyiab
Zhang Lanhe (2015) et al. Kawm txog kev sib koom ua ke ntawm chitosan (CTS) thiab coagulant hauv kev kho cov dej khib nyiab, thiab pom tias nws zoo dua ntxiv chitosan.
Cov kev tshem tawm ntawm COD thiab turbidity tau nce 13.2% thiab 5.9%.
Xie Lin (2010) tau kawm txog cov txiaj ntsig ntawm PAC thiab PAM ua ke kev kho cov dej khib nyiab papermaking.
Liu Zhiqiang (2013) thiab lwm tus siv nws tus kheej ua PAC thiab PAC composite flocculant ua ke nrog ultrasonic los kho luam ntawv thiab dyeing dej khib nyiab. Nws tau txiav txim siab tias thaum tus nqi pH nyob nruab nrab ntawm 11 thiab 13, PAC tau xub ntxiv thiab nplawm rau 2 min, thiab tom qab ntawd PAC tau ntxiv thiab nplawm rau 3 min, cov nyhuv kho tau zoo tshaj plaws.
Zhou Danni (2016) thiab lwm tus tau kawm txog kev kho mob ntawm PAC + PAM ntawm cov dej phwj tuaj hauv tsev, piv rau kev kho cov nyhuv ntawm cov tshuaj tua kab mob lom thiab tshuaj tua kab mob lom, thiab pom tias PAC + PAM zoo dua li txoj kev kho mob lom hauv kev tshem tawm cov roj, tab sis PAC + PAM tau zoo dua li txoj kev kho kab mob lom hauv dej tsis zoo.
Wang Zhizhi (2014) et al. Kawm txog txoj kev kho mob ntawm kev kho papermaking nruab nrab theem dej khib nyiab los ntawm PAC + PAM coagulation ua ib feem ntawm txoj kev. Thaum cov koob tshuaj ntawm PAC yog 250 mg / L, qhov ntau npaum ntawm PAM yog 0.7 mg / L, thiab pH tus nqi yog ze li ntawm nruab nrab, COD tshem tawm tus nqi nce mus txog 68%.
Zuo Weiyuan (2018) thiab lwm tus tau kawm thiab sib piv cov nyhuv flocculation sib xyaw ntawm Fe3O4 / PAC / PAM. Qhov kev ntsuam xyuas qhia tau hais tias thaum qhov piv ntawm peb yog 1: 2: 1, kev kho mob ntawm kev luam ntawv thiab dyeing dej khib nyiab yog qhov zoo tshaj plaws.
LV sining (2010) et al. Kawm txog kev kho mob ntawm PAC + PAM ua ke ntawm cov dej khib nyiab hauv nruab nrab. Cov kev tshawb fawb qhia tau hais tias qhov sib xyaw flocculation nyhuv yog qhov zoo tshaj plaws nyob rau hauv acidic ib puag ncig (pH 5). Qhov ntau npaum ntawm PAC yog 1200 mg / L, qhov ntau npaum ntawm PAM yog 120 mg / L, thiab tus nqi tshem tawm cod yog ntau tshaj 60%.
1.3 Coal chemical wastewater thiab refining wastewater
Yang Li (2013) et al. Kawm txog cov txiaj ntsig coagulation ntawm PAC + PAM hauv kev lag luam thee kev kho dej khib nyiab, piv rau qhov seem turbidity nyob rau hauv qhov sib txawv, thiab muab cov kev hloov kho ntawm PAM raws li qhov sib txawv pib turbidity.
Fang Xiaoling (2014) thiab lwm tus piv cov coagulation nyhuv ntawm PAC + Chi thiab PAC + PAM ntawm refinery dej khib nyiab. Lawv xaus lus tias PAC + Chi muaj cov nyhuv flocculation zoo dua thiab ntau dua COD tshem tawm efficiency. Cov txiaj ntsig kev sim tau pom tias qhov zoo tshaj plaws stirring lub sij hawm yog 10 min thiab qhov zoo tshaj pH tus nqi yog 7.
Deng Lei (2017) et al. Kawm txog cov nyhuv flocculation ntawm PAC + PAM ntawm cov dej khib nyiab drilling, thiab COD tshem tawm tus nqi mus txog ntau dua 80%.
Wu Jinhua (2017) et al. Kawm txog kev kho cov thee chemical wastewater los ntawm coagulation. PAC yog 2 g / L thiab PAM yog 1 mg / L. qhov kev sim qhia tau hais tias qhov pH zoo tshaj plaws yog 8.
Guo Jinling (2009) et al. Kawm txog kev kho dej ntawm kev sib xyaw flocculation thiab txiav txim siab tias kev tshem tawm cov nyhuv yog qhov zoo tshaj plaws thaum cov koob tshuaj ntawm PAC yog 24 mg / L thiab PAM yog 0.3 mg / L.
Lin Lu (2015) et al. Kawm txog cov nyhuv flocculation ntawm pac-pam ua ke ntawm cov roj emulsified uas muaj cov dej khib nyiab nyob rau hauv cov xwm txheej sib txawv, thiab sib piv cov nyhuv ntawm ib qho flocculant. Qhov kawg koob tshuaj yog: PAC 30 mg / L, pam6 mg / L, ambient kub 40 ℃, nruab nrab pH nqi thiab sedimentation lub sij hawm rau ntau tshaj 30 min. Raws li cov xwm txheej zoo tshaj plaws, COD tshem tawm kev ua haujlwm tau nce mus txog 85%.
2 qhov xaus thiab cov lus qhia
Kev sib xyaw ntawm polyaluminium chloride (PAC) thiab polyacrylamide (PAM) tau siv dav hauv txhua qhov chaw ntawm lub neej. Nws muaj peev xwm loj hauv kev kho dej khib nyiab thiab sludge, thiab nws cov nqi lag luam yuav tsum tau tshawb nrhiav ntxiv.
Kev sib xyaw ua ke ntawm PAC thiab PAM feem ntau yog nyob ntawm qhov zoo tshaj plaws ductility ntawm PAM macromolecular saw, ua ke nrog Al3 + hauv PAC thiab - O hauv PAM los tsim cov qauv sib txuas ruaj khov dua. Lub network qauv tuaj yeem ruaj khov lub hnab ntawv lwm yam impurities xws li cov khoom siv thiab cov roj tee, yog li nws muaj kev kho zoo heev rau cov dej khib nyiab nrog ntau hom impurities, tshwj xeeb tshaj yog rau kev sib koom ua ke ntawm cov roj thiab dej.
Tib lub sijhawm, kev sib xyaw ntawm PAC thiab PAM kuj muaj qhov tsis xws luag. Cov ntsiab lus dej ntawm cov tsim flocculate yog siab, thiab nws cov qauv ruaj khov ua rau muaj kev xav tau ntau dua rau kev kho mob theem nrab. Yog li ntawd, kev txhim kho ntxiv ntawm PAC ua ke nrog PAM tseem ntsib teeb meem thiab cov teeb meem.
Post lub sij hawm: Oct-09-2021