Los ntawm: Kate
Email:kate@aquasust.com
Hnub tim: 2 Kaum Ob Hlis 2024
Cov ntsiab cai thiab cov yam ntxwv ntawm covLamellaLub Tank
Raws li lub hauv paus ntsiab lus ntawm cov tso tsheb hlau luam ntiav, nyob rau hauv cov xwm txheej ntawm qhov ntim tau zoo ntawm lub tank ntim, qhov loj ntawm thaj tsam ntawm lub tank, qhov ntau dua qhov kev ua haujlwm ntawm sedimentation. Qhov no yog ywj siab ntawm lub sij hawm sedimentation. Qhov ntiav ntiav lub tank, qhov luv lub sij hawm sedimentation. Lub cheeb tsam sedimentation ntawm Lamella packing settling tank yog muab faib ua nyias txheej los ntawm ib tug series ntawm parallel Tube settlerss los yog Lamellas, xav txog lub hauv paus ntsiab lus ntawm ntiav tso tsheb hlau luam.
Yam ntxwv ntawmTube settlersthiabLamella Sedimentation tank:
1.Kev siv Laminar Flow Principple
Cov dej ntws nruab nrab ntawm cov phiaj los yog hauv cov raj, thiab lub vojvoog hydraulic yog me me, ua rau muaj tus lej Reynolds tsawg. Feem ntau, Reynolds tus naj npawb (Re) yog nyob ib ncig ntawm 200, thiab cov dej ntws nthuav tawm cov yam ntxwv ntawm laminar, uas muaj txiaj ntsig zoo rau sedimentation. Froude tus naj npawb ntawm cov dej ntws hauv Lamellas yog kwv yees li ntawm 110^-3 thiab 110^-4, qhia txog lub xeev khiav ruaj khov.
2.Ntawm thaj tsam ntawm Tank
Tus tsim ua rau kom thaj tsam ntawm lub tank settling, txhim kho cov sedimentation efficiency. Txawm li cas los xij, vim muaj qee yam xws li kev teeb tsa tshwj xeeb ntawm Tube settlerss, kev cuam tshuam ntawm cov dej nkag thiab qhov hluav taws xob, thiab cov qauv ntws hauv cov phiaj los yog cov raj, lub peev xwm kho qhov tseeb tsis tuaj yeem ua tiav qhov ntau yam theoretical. Qhov tseeb nce hauv sedimentation efficiency piv rau theoretical sedimentation efficiency yog hu ua tus coefficient zoo.
3.Shortened Settling Distance
Cov particles muaj ib tug luv luv nyob deb, txo lub sij hawm sedimentation.
4.Re-coagulation ntawm Flocculent Particles
Lub re-coagulation ntawm flocculent hais nyob rau hauv lub Tube settlerss los yog hlab txhawb ntxiv particle loj hlob, txhim kho sedimentation efficiency.
Qauv ntawmLamella Sedimentation tank
Cov qauv ntawm Lamella los yog Tube settlers settling tank yog zoo ib yam li ntawm ib tug general settling tank. Nws muaj plaub qhov tseem ceeb: qhov chaw nkag, thaj chaw sedimentation, qhov hluav taws xob, thiab sludge sau zone. Qhov sib txawv tseem ceeb yog nyob rau hauv cheeb tsam sedimentation, ib tug xov tooj ntawm Lamellas los yog Tube settlerss raug ntsia.
Nyob rau hauv Tube settlers los yog Lamella Sedimentation tank, cov dej ntws kev taw qhia thoob plaws lub Tube settlerss yuav muab faib ua peb hom: nce siab, downward flow, thiab kab rov tav ntws, raws li qhia nyob rau hauv daim duab 2.
· Upward Flow(tseem hu ua countercurrent flow): Cov dej ntws los ntawm Lamellas los yog daim phiaj, thaum cov khib nyiab ntws mus rau hauv qab. Lawv cov lus qhia yog qhov sib txawv.
· Downward Flow(tseem hu ua co-tam sim no ntws): Cov dej ntws los ntawm Lamellas los yog daim hlau, thiab cov khib nyiab kuj tseem ntws mus rau hauv tib txoj kev.
· Kab rov tav Flow (tseem hu ua transverse flow, tsuas yog siv rau Tube settlerss): Cov dej ntws horizontally hla cov phiaj.
Thaum cov kev taw qhia ntws zoo ib yam, nws hu uanqes ntws(tseem hu uaco-tam sim no ntws). Thaum cov dej ntws mus rau hauv kab rov tav, nws hu uakab rov tav ntws(tseem hu uatransverse ntws, tsuas yog siv rau Tube settlerss).
· Qhov chaw nkag
Cov dej ntws mus rau hauv lub tank los ntawm txoj kab rov tav. Qhov chaw inlet feem ntau suav nrog cov phab ntsa perforated, qhov phab ntsa, thiab downward flow Lamella inlets, thiab lwm yam, kom ntseeg tau tias cov dej tsis sib xws thoob plaws qhov dav ntawm lub tank. Cov qauv tsim thiab layout yuav tsum zoo ib yam li cov kab rov tav ntws tso dej tank. Txhawm rau xyuas kom cov dej ntws zoo sib xws hauv qhov ntws nce toj Lamellas, qhov siab ntawm thaj chaw faib khoom yuav tsum tau khaws cia hauv qab Lamellas, thiab cov dej ntws nrawm ntawm qhov nkag yuav tsum tsis pub tshaj 0.02-0.05 m/s.
· Inclination Angle ntawmTube settlerss and Tub
Lub kaum sab xis ntawm Tube settlers thiab txoj kab rov tav yog hu uainclination lub kaum sab xis. Qhov me me ntawm lub kaum sab xis (), qhov me me ntawm qhov ceev ceev (u0), thiab qhov zoo dua qhov kev daws teeb meem. Txawm li cas los xij, txhawm rau xyuas kom meej tias cov sludge tuaj yeem txiav tawm thiab cov sludge tawm yog du, tus nqi yuav tsum tsis txhob tsawg dhau. Rau upward flow Tube settlers lossis tube Sedimentation tank, feem ntau tsis tsawg dua 55 degree -60 degree . Rau downward flow Tube settlers lossis tube Sedimentation tank, qhov twg sludge tawm yooj yim dua, feem ntau tsis tsawg dua 30 degree -40 degree .
· Cov duab thiab cov khoom ntawm Tube settlerss thiab Tubes
Txhawm rau kom siv tag nrho cov ntim ntim ntawm lub tank ntim, Tube settlerss thiab tubes yog tsim los nrog ntom ntim geometric cross-sections, xws li square, rectangular, tsis tu ncua hexagonal, thiab corrugated duab. Rau kev yooj yim installation, ob peb los yog ntau pua ntawm Lamellas feem ntau sib sau ua ke ua ib qho module, thiab tom qab ntawd ntau lub modules muab tso rau hauv thaj tsam sedimentation. Cov ntaub ntawv siv rau Tube settlerss thiab cov raj yuav tsum yog lub teeb yuag, ruaj khov, tsis muaj tshuaj lom, thiab siv tau zoo. Cov ntaub ntawv muaj xws li cov ntaub ntawv honeycomb thiab cov ntawv nyias nyias. Honeycomb Lamellas tuaj yeem tsim los ntawm daim ntawv impregnated thiab kho nrog phenolic resin, feem ntau tsim rau hauv cov hexagons tsis tu ncua nrog ib lub voj voog inscribed txoj kab uas hla ntawm 25 hli. Cov nplooj ntawv yas feem ntau yog ua los ntawm cov ntawv tawv PVC nrog lub thickness ntawm 0.4mm, uas yog kub nias rau hauv cov duab.
· Length thiab Spacing ntawm Tube settlerss thiab Tubes
Qhov ntev ntawm Tube settlerss los yog raj, qhov siab dua qhov kev daws teeb meem. Txawm li cas los xij, yog tias Tube settlerss los yog cov raj ntev dhau lawm, kev tsim khoom thiab kev teeb tsa ua nyuaj dua, thiab tom qab qee qhov ntev, kev txuas ntxiv txuas ntxiv muab kev txhim kho hauv kev daws teeb meem. Yog hais tias qhov ntev yog luv dhau, qhov kev faib ua feem ntawm qhov kev hloov pauv inlet (qhov seem uas cov dej ntws hloov pauv ntawm cov dej ntws tawm ntawm qhov nkag mus rau laminar ntws) nce, txo qhov ntev ntawm thaj chaw zoo sedimentation. Qhov ntev ntawm qhov kev hloov pauv feem ntau yog nyob ib ncig ntawm 100-200mm.
Raws li kev paub dhau los, qhov ntev ntawm qhov ntws nce siab Tube settlerss feem ntau yog {{0}}.8-1.0m, thiab yuav tsum tsis pub tsawg dua 0.5m. Rau downward ntws, qhov ntev yog nyob ib ncig ntawm 2.5m. Thaum qhov sib txawv ntawm qhov sib tw tseem zoo ib yam, qhov me me ntawm qhov sib txawv ntawm Tube settlerss los yog txoj kab uas hla ntawm cov hlab, qhov siab dua qhov ntws tawm hauv cov hlab thiab qhov chaw thauj khoom. Qhov no tso cai rau txo qhov ntim ntawm lub tank. Txawm li cas los xij, qhov sib nrug me me lossis txoj kab uas hla ntawm lub raj ua rau kev tsim khoom nyuaj thiab ua rau muaj kev pheej hmoo ntawm txhaws. Rau sab saud ntws Sedimentation tank siv hauv kev kho dej, qhov sib nrug ntawm Tube settlerss lossis raj txoj kab uas hla yog feem ntau 50-150mm, thaum rau downward flow Tube settlers Sedimentation tank, qhov sib nrug yog li 35mm.
· Qhov hluav taws xob cheeb tsam
Txhawm rau kom ntseeg tau tias cov dej tsis sib xws los ntawm Tube settlerss los yog cov raj, qhov kev npaj ntawm cov khoom sau kuj tseem ceeb heev. Lub kaw lus sau suav nrog cov ceg sau thiab cov channel sau tseem ceeb. Cov ceg sau tuaj yeem suav nrog perforated collection troughs, triangular weirs, nyias weirs, thiab perforated kav, thiab lwm yam. Qhov siab ntawm Lamella qhov hluav taws xob mus rau qhov chaw sau (piv txwv li, thaj chaw dej ntshiab qhov siab) muaj feem xyuam rau qhov sib nrug ntawm cov ceg sau thiab yuav tsum ua raws li cov qauv hauv qab no:
h Ntau dua lossis sib npaug √3/2L
qhov twg h yog qhov chaw dej ntshiab qhov siab (hauv meters) thiab L yog qhov sib nrug ntawm cov ceg sau (hauv meters). Tus nqi ntawm L yog 1.2-1.8m, yog li h feem ntau nyob nruab nrab ntawm 1.0-1.5m.
· Particle Settling Velocity (u0)
Cov dej ntws tawm hauv lub Tube settlerss zoo ib yam li cov kab rov tav ntws tawm hauv lub tank kab rov tav, feem ntau ntawm {{0}}mm/s. Thaum siv cov coagulation kev kho mob, qhov kev nrawm nrawm u0u0u0 feem ntau yog nruab nrab ntawm 0.3-0.6mm/s.
Tej yam cuam tshuam thiab cov teeb meem tshwm sim hauvLamella Sedimentation tank
Lamella Sedimentation tank yog dav siv nyob rau hauv cov dej khib nyiab-tshuaj lom cov txheej txheem. Kab lus no hais txog cov teeb meem tshwm sim hauv kev siv tswv yim, xws li kev faib dej tsis sib luag ntawm qhov nkag, cov sludge hoppers tau txhaws, thiab cov ntab ntawm floc, uas ua rau txo qis hauv cov dej zoo. Los ntawm kev txheeb xyuas cov laj thawj, cov kev daws teeb meem sib raug tau npaj.
1.Tej yam uas cuam tshuam rau kev daws teebmeem ntawmTube settlerss and Tub
1, Cov ntu nruab nrab ntawm Cov Tube settlerss thiab cov raj yog laminar ntws, tab sis cov qhov nkag thiab qhov hluav taws xob tau cuam tshuam los ntawm cov dej nkag thiab tawm, ua rau muaj kev cuam tshuam.
2, Cov dej ntws hauv Tube settlerss thiab cov hlab yog qhov ruaj khov, uas yuav pab txhim kho cov kev daws teeb meem.
3, Vim lub sij hawm luv luv nyob deb thiab lub sij hawm, nws yuav tsum tau coagulation tshwm sim tag nrho ua ntej cov dej nkag mus rau hauv lub tank settling.
4, Cov nyhuv hnyav ntawm qhov ntws nce siab yog tsawg; upward flow yog haum rau high-turbidity dej, thaum downward flow yog haum rau heev tsawg-turbidity dej.
2.Tshaj tawm turbidityKev tshuaj xyuas qhov ua rau
1, Kev faib dej tsis sib xws ntawm qhov nkag ntawm Lamella lub tank. Nyob rau hauv ib ncig ntawm lub inlet, qhov hnyav turbulence tej zaum yuav tshwm sim los yog cov dej khiav ceev yuav siab dhau heev lawm, ua rau cov sludge uas yav tas los tso rau ntawm Lamellas rov ncua.
2, Localized "luv-circuiting" yuav tshwm sim, uas cuam tshuam rau kev ruaj ntseg ntawm flocs, ua rau cov flocs uas tau tsim ua ntej yuav tawg mus rau hauv me me hais.
3, txhawm rau xyuas kom cov dej tsis sib xws, cov phab ntsa perforated baffle nyob rau hauv Lamella settling tank feem ntau muaj qhov qhib me me, uas ua rau cov dej ntws ntau dua los ntawm qhov sib piv rau cov kab rov tav ntws tso dej. Qhov no tej zaum yuav ua rau yav tas los tsim flocs kom tawg dua thiab yooj yim resuspend tuag sludge nyob rau hauv qab ntawm lub tis qhov, ua rau effluent turbidity.
Kev daws:
1, Muab lub raj tso rau ntawm 60 degree kaum sab xis rau kab rov tav, thiab nruab ib kab ntawm tis daim hlau hauv qab txhua Tube settlers, kuj ntawm 60 degree kaum rau kab rov tav. Qhov sib ntxiv ntawm cov tis daim hlau no tuaj yeem txo cov Reynolds tus naj npawb ntawm cov dej ntws, ua kom cov viscous rog thaum lub sij hawm ntws, uas yog qhov zoo rau kev daws teeb meem. Tsis tas li ntawd, txoj kev luv luv rau cov khoom pab cov denser particles zoo dua.
2, xyuas kom muaj kev faib tawm tsis sib xws los ntawm kev siv cov phab ntsa perforated baffle rau kev faib dej. Txoj kab rov tav ntws nrawm ntawm qhov pib ntawm thaj chaw faib khoom yuav tsum tswj hwm ntawm 0.010–0.018 m/s.
3, Ntxiv ib feem ntawm kab rov tav ntws (xws li) nyob rau pem hauv ntej ntawm lub tank, yog li cov dej ntws tsis tau nkag mus rau hauv Lamella lub tank tam sim ntawd tab sis hloov mus dhau los ntawm kab rov tav ntu ua ntej (nyob 1/3 ntawm tag nrho qhov ntev ntawm lub tank. tank). Kab rov tav ntu no txhim kho lub tank tiv thaiv kev poob siab, ntxiv txo cov kab rov tav ntws tawm, uas pab daws teeb meem, ntxiv dag zog rau kev cuam tshuam rau kev thauj khoom, thiab txhim kho kev daws teeb meem. Tsis tas li ntawd, kev txhim kho cov ntawv qhia phab ntsa hauv kab rov tav thiab Lamella ntu ua rau nce qhov nrawm nrawm hauv Lamellas thiab ntxiv dag zog rau kev daws teeb meem.
3.Clogging ntawm Sludge Hopper thiab Poor Sludge DischargeKev tshuaj xyuas qhov ua rau
Lamella Sedimentation tank feem ntau siv cov tshuab sludge tshem tawm, uas tuaj yeem ua rau sludge tsub zuj zuj ntawm cov npoo thiab qhov kawg ntawm lub tank, tsim cov fab tuag hauv thaj chaw tshem tawm sludge. Qhov no ua rau muaj sludge tsub zuj zuj hauv cov cheeb tsam no.
Kev tsim cov sludge tso cov kav dej yuav tsis tsim nyog.
Kev daws:
Hloov kho lub tank tsim kom txo cov sludge tuag ces kaum. Txais lub ntiajteb txawj nqus sludge tshem tawm nrog ib tug loj sludge hopper, uas ua rau muaj kev cuam tshuam tsawg heev rau cov dej ntws thiab tsis tshua muaj clog. Lub kaum sab xis rau kev tshem tawm sludge yuav tsum ntau dua li cov sludge hoppers me me, kom ntseeg tau tias kev tshem tawm cov sludge tiav.
Siv cov txheej txheem tshem tawm cov khib nyiab-hom sludge, ua kom cov sludge tshem tawm trenches nyob hauv qab ntawm lub tank los txhim kho kev ua haujlwm ntawm sludge tshem tawm.
