Sib nqus flocculation thev naus laus zis yog ua kom paub cov khoom siv sib nqus sib nqus rau hauv cov txheej txheem flocculation sedimentation sib cais, kom cov flocs tsim los ntawm flocculation tau zoo ua ke nrog cov khoom thauj khoom, cov nyhuv flocculation yog txhim kho, qhov tshwj xeeb lub ntiajteb txawj nqus ntawm flocs yog nce, flocs nyob. ceev ceev yog ceev, lub cev dej yog sai purified, thiab cov effluent yog ntshiab thiab pob tshab. Cov sludge nyob rau hauv lub tank qhia meej yog thawj zaug xa mus rau lub nruas teb magnetic hmoov rov qab tshuab kom rov qab tau cov hmoov hlau nplaum rau kev rov ua dua tshiab, thiab cov sludge raug tso tawm mus rau lub sludge dewatering system. Sib nqus flocculation tshuab yog dav siv nyob rau hauv kev kho mob sib sib zog nqus ntawm loj, nruab nrab thiab me dej phwj nroj tsuag.
Technical zoo
Qhov sib nqus flocculation mixing system ntxiv cov hmoov sib nqus thiab flocculants, uas tuaj yeem tshem tawm cov kab mob, kab mob thiab ntau yam me me. Yog li ntawd, SS tshem tawm tus nqi siab dua li cov txheej txheem ib txwm muaj, thiab cov dej tsis zoo thiab kev ruaj ntseg yog siab. Nyob rau tib lub sijhawm, hydraulic load yog siab, tus nqi nce yog 15-30m / h, lub sij hawm nyob yog luv heev, thiab nws high-speed sedimentation kev ua tau zoo heev. Piv nrog rau cov txheej txheem ib txwm muaj, nws muaj ntau yam zoo xws li kev ceev ceev, kev ua haujlwm siab, me me hneev taw thiab peev me me.
Daim ntawv thov
- Daim ntawv thov nyob rau hauv tob phosphorus tshem tawm cov dej phwj hauv tsev
Cov txheej txheem tshem tawm cov tshuaj phosphorus cov txheej txheem muaj teeb meem xws li xoob flocs, qeeb sedimentation, qhov chaw hauv pem teb loj, ntau cov tshuaj phosphorus ntau npaum li cas, cov av nkos ntau, thiab cov nqi khiav lag luam siab, uas tau ua rau muaj kev tsis sib haum xeeb hauv kev tsim cov tshuaj phosphorus tshem tawm cov txheej txheem. .
Raws li ib hom kev tshem tawm ntawm lub cev thiab tshuaj phosphorus, magnetic flocculation sedimentation technology overcomes qhov tsis xws luag ntawm cov tshuaj phosphorus tshem tawm. Nws muaj cov yam ntxwv ntawm cov nplaim taws, nrawm sedimentation ceev, tsawg tus nqi thiab cov neeg ua haujlwm tsawg, thiab yog siv hauv kev ua dej phwj tuaj hauv tsev.
Tsoos tshuaj phosphorus tshem tawm tsis teeb tsa cov sludge rov qab vim tias flocs tsis yooj yim los daws. Sib nqus flocculation sedimentation thev naus laus zis ntxiv cov sludge rov qab rau hauv lub cev, thiab cov sludge tseem tuaj yeem nyob ntawm qhov kub ceev hauv lub tank sedimentation tom qab rov qab los. Lub luag haujlwm tseem ceeb ntawm sludge rov qab yog txhawm rau ua kom cov nyhuv flocculation thiab txo cov nqi ntawm cov tshuaj flocculant.
Experimental studies have shown that the best order of agent placement for deep phosphorus removal of urban sewage using magnetic flocculation technology is: PAC→magnetic powder→PAM. By comparing the results of the two groups of experiments, the effect of using magnetic flocculation technology is obvious for sewage containing a large amount of phosphate, with a removal rate of 97% and an effluent concentration of 0.15 mg/L; while the removal effect of magnetic flocculation technology on organic phosphorus is relatively poor. For sewage containing a large amount of organic phosphorus, the total phosphorus removal rate is 75%, and the effluent concentration is 1.43 mg/L. Through the orthogonal experiment of the two groups of experiments, it is concluded that the influence of magnetic flocculation technology in phosphorus removal experiments is: PAC concentration> magnetic powder concentration> PAM concentration>lub sij hawm sedimentation.
Piv nrog rau cov thev naus laus zis niaj hnub, kev siv tshuab sib nqus flocculation tsis tsuas yog muaj txiaj ntsig zoo ntawm kev tshem tawm cov khib nyiab thiab COD, tab sis kuj txo lub sij hawm los ntawm 33%, kom cov me me sedimentation tso tsheb hlau luam thiab lwm lub tsev tuaj yeem siv los txo cov nqi.
Cov kev tshawb fawb tau lees paub tias qhov loj me me ntawm cov hlau nplaum yog qhov zoo tshaj plaws ntawm 75-105μm. Nyob rau hauv turbulent vortex, vim qhov sib ntxiv ntawm cov hlau nplaum, lub zog ntawm floc particles hloov, yog li hloov mus tas li. Qhov tshwm sim ntawm kev sib tsoo ntawm flocs thiab hlau nplaum hauv dej nce, ua kom yooj yim rau kev sib nqus flocs, thiab qhov kev tshem tawm tau zoo dua. Yog hais tias qhov sib nqus particle loj dhau los yog me me dhau lawm, lub zog centrifugal inertia yuav me me los yog loj dhau, ua rau tsis ruaj khov lossis puas flocs, yog li cov nyhuv tshem tawm tsis zoo. Txawm li cas los xij, nyob rau theem flocculation, qhov loj vortex tsim los ntawm cov kab loj-ntev magnetic hmoov tuaj yeem ua ke txhawb kev tsim cov flocs, yog li txhim kho tus nqi tshem tawm.
- Daim ntawv thov hauv mine tailings dej kho
Thaum lub sij hawm mining txheej txheem, ib tug loj tus naj npawb ntawm nplua-grained hais yog tsim los ntawm crushing ntawm ntxhia ua thiab lwm yam txheej txheem. Cov nplua-grained hais nyob rau hauv mine tailings dej muaj cov yam ntxwv ntawm me me particle loj, zoo hydrophobicity, thiab siab tsis zoo lub peev xwm, uas ua rau nws yooj yim rau stabilize lub suspended solids. Cov txheej txheem flocculation thiab sedimentation yog qhov nyuaj rau kev kho.
Nyob rau hauv xyoo tas los no, magnetic flocculation thev naus laus zis tau siv dav hauv kev kho cov tailings dej hauv ntau qhov mines raws li cov cuab yeej tshiab tailings dej kho tshuab. Piv nrog rau cov txheej txheem flocculation thiab sedimentation, nws muaj qhov zoo ntawm kev siv hluav taws xob tsawg, cov txiaj ntsig zoo thiab tus nqi qis hauv kev kho kuv cov dej tailings.
Cov txiaj ntsig ntawm kev tshawb fawb cuam tshuam txog kev kho cov dej hauv kuv los ntawm cov txheej txheem sib nqus flocculation qhia tau hais tias qhov zoo tshaj plaws coagulant hauv cov txheej txheem sib nqus flocculation yog PAC, thiab qhov koob tshuaj zoo tshaj plaws yog 60 mg / L. Hom coagulant PAM muaj kev cuam tshuam me ntsis ntawm kev kho mob. Xav txog tus nqi, anionic PAM raug xaiv raws li qhov zoo tshaj plaws coagulant, thiab qhov koob tshuaj zoo tshaj plaws yog 4 mg / L.
Qhov sib ntxiv ntawm hom sib nqus tsis tshua muaj txiaj ntsig rau kev txhim kho cov dej ntws tawm thiab SS tshem tawm tus nqi, tab sis tuaj yeem txo lub sij hawm sedimentation. Lub sij hawm floc sedimentation yog tsawg tshaj li 15s, thiab cov effluent turbidity tshem tawm tus nqi tuaj yeem ncav cuag ntau dua 95%. Qhov sib xyaw ua ke ntawm peb-theem cov tshuaj tiv thaiv tank yuav tsum raug txo, uas yog 300, 200, thiab 100r / min feem.
- Kev siv hauv coking wastewater kho
Cov dej khib nyiab uas tsim los ntawm qhov kub-kub thee coking, thee gas purification, coking products recovery and refined operations is called coking wastewater. Cov tshuaj lom neeg muaj pes tsawg leeg ntawm coking dej khib nyiab feem ntau yog ammonium ntsev ntawm inorganic tebchaw thiab phenols, monocyclic thiab polycyclic aromatic compounds, thiab heterocyclic tebchaw uas muaj nitrogen, sulfur thiab oxygen nyob rau hauv cov organic tebchaw. Tam sim no, ntau lub teb chaws xaiv los kho cov dej khib nyiab los ntawm txoj kev biochemical. Vim nws qhov nyuaj biodegradability, nws yog ib qho nyuaj rau kho cov dej khib nyiab rau tus qauv los ntawm txoj kev biochemical, thiab kev sib sib zog nqus ntawm coking dej khib nyiab feem ntau yog ua los ntawm kev sib xyaw.
Tam sim no, cov koom haum cuam tshuam feem ntau siv coagulation thiab adsorption txoj hauv kev rau kev kho cov dej khib nyiab sib sib zog nqus. Raws li cov cuab yeej kho dej tshiab, kev siv tshuab magnetic flocculation tau nyiam ntau thiab ntau tus neeg los kawm nws vim nws qhov tshwj xeeb zoo. Cov hmoov sib nqus ntxiv rau cov dej khib nyiab diffuses hauv dej, tso siab rau nws lub zog sib nqus kom tau txais ib qho chaw loj ntawm qhov chaw thiab tsim kom muaj ib qho chaw sib nqus rau adsorb charged colloid hais. Nyob rau tib lub sijhawm, cov hmoov sib nqus hmoov uas tau muab tshem tawm hauv cov dej khib nyiab tuaj yeem ua rau cov khoom raug tshem tawm, yog li ua kom muaj kev sib tsoo ntawm cov khoom sib tsoo, ua rau nws yooj yim rau kev tsim flocs, thiab qhov kev tshem tawm kuj nce ntxiv nrog kev txhim kho ntawm cov nyhuv flocculation. .
Cov kev sim tau pom tias nyob rau theem pib ntawm kev ntxiv cov hmoov sib nqus, ntau qhov ntsuas ntawm coking cov dej khib nyiab nce nrog qhov nce ntawm qhov sib ntxiv. Thaum cov khoom nkag mus txog 400 mg / L, cov nyhuv tshem tawm yog qhov zoo tshaj plaws, nrog rau CODcr tshem tawm tus nqi ntawm 62.5%, turbidity tshem tawm tus nqi ntawm 92.2%, thiab ammonia nitrogen tshem tawm tus nqi ntawm 22.3%. Piv nrog rau kev tshem tawm tus nqi tsis ntxiv cov hmoov sib nqus, qhov kev tshem tawm tau nce 1.5%, 2.4% thiab 1.6% feem. Txawm li cas los xij, thaum sib nqus hmoov ntxiv, qhov kev tshem tawm tau txo qis.
Kev soj ntsuam kev soj ntsuam tau pom tias kev sib xyaw ntawm cov hmoov sib nqus thiab flocs tsim ib qho sib nqus sib nqus flocculent nrog lub ntim me me, kev sib xyaw ua ke nruj dua thiab nrawm dua sedimentation. Kev soj ntsuam pom tau tias nyob rau hauv tus txheej txheem ntawm kev sib nqus hmoov, ntau cov hmoov hlau nplaum tuaj yeem ua ke nrog flocs, yog li qhov kev tshem tawm tau nce ntxiv. Txawm li cas los xij, raws li tus nqi ntawm cov hmoov sib nqus ntxiv tshaj qhov zoo tshaj plaws, tsis tsuas yog cov hlau nplaum floccules yuav tsis tsim, tab sis cov hmoov hlau nplaum kuj tseem cuam tshuam nrog cov adsorption ntawm cov pa phem los ntawm flocculants, yog li txo tus nqi tshem tawm.
- Daim ntawv thov hauv kev kho dej phwj cog kev kho dua tshiab thiab hloov pauv
Vim tias tsis muaj cov peev txheej dej hauv ib tus neeg thiab muaj kuab paug ntawm cov peev txheej dej hauv cov nroog, kev kho dej phwj tau zoo tau txais txiaj ntsig ntau dua. Tam sim no, cov txheej txheem kev kho mob ntawm cov dej phwj hauv tsev feem ntau yog kev kho lub cev thiab kev kho mob thib ob, tab sis cov nyhuv tsis zoo.
Raws li hom dej phwj sib sib zog nqus kev kho tshuab, tshuab magnetic flocculation tau dhau los ua ib txoj hauv kev tshiab los txhim kho cov dej phwj tuaj kho cov nroj tsuag vim nws cov txiaj ntsig zoo. Txhawm rau ua kom tau raws li qhov yuav tsum tau ua ntawm Chav Kawm A tus qauv hauv "Pollutant Emission Standard for Urban Sewage Treatment Plants" (GB18918-2002) rau qhov tso tawm qhov ntsuas ntawm effluent, ntau tus kws tshawb fawb tau kawm txog kev siv tshuab magnetic flocculation hauv txhim kho thiab hloov kho cov dej phwj tuaj kho cov nroj tsuag.
Hauv qee qhov ntau, qhov kev tshem tawm ntawm SS tuaj yeem txhim kho los ntawm kev ua kom ntau npaum li cas ntawm PAC thiab sib nqus hmoov reagents, tab sis nrog kev nce ntawm PAM, qhov kev tshem tawm ntawm SS qhia tau hais tias tus qauv ntawm thawj zaug nce thiab tom qab ntawd txo qis. Kev nce qib ntawm cov hmoov sib nqus thiab PAC tuaj yeem txhim kho qhov kev tshem tawm cov dej phwj tuaj; Nrog rau qhov nce ntawm PAM ntau npaum li cas, qhov kev tshem tawm turbidity feem ntau yuav txo qis tom qab, thiab kev sib tw ceev kuj tseem cuam tshuam rau kev tshem tawm. Kev nrawm dhau thiab qeeb dhau tsis zoo.
Nyob rau tib lub sijhawm, nws tau npaj siab tias cov hmoov sib nqus pom qhov sib txawv ntawm thawj zaug nce thiab tom qab ntawd txo qis; cov nyhuv tshem tawm tsis zoo thaum lub nplawm tus nqi nrawm dhau los yog qeeb dhau. Qhov ua ntej cov hlau nplaum tau ntxiv, qhov txiaj ntsig zoo dua rau kev tshem tawm SS. Qhov kev txiav txim ntawm kev ntxiv tshuaj yog sib nqus hmoov, PAC, ces stirring rau 4 feeb, thiab ces ntxiv PAM.