Koj paub tias lub raj xa dej tshem tawm cov khib nyiab pov tseg. Tab sis koj puas paub tias qhov loj npaum li cas nws tshem tawm - thiab qhov loj npaum li cas hla dhau txawm tias lub tank tsim tau zoo npaum li cas? Siv CFD simulation ntawm ib tug tiag tiag 1,000 m³ / d txee-tam sim no inclined tube settler nyob rau hauv Anhui xeev, cov kws tshawb fawb tau qauv tus cwj pwm ntawm hais los ntawm30-120 μmraws li kev ua haujlwm tiag tiag. Qhov tshwm sim yog qhov pib meej: hauv qab 80 μm, qhov loj me me nyuam qhuav tsis muaj teeb meem rau kev tshem tawm. Tshaj li 80 μm, kev ua haujlwm tawm mus. Yog tias koj cov coagulant tsis tsim cov flocs siab tshaj qhov pib, koj cov hlab ntsha inclined tsis ua qhov koj them rau.
VIM LI CAS CFD - THIAB VIM LI CAS LI CAS
Feem ntau cov kev tshawb fawb ntawm inclined tube settlers tsom rau cov qauv ntws - optimizing tank qhov ntev, txo qhov chaw tuag, smoothing tshaj tawm. Ob peb tau nug cov lus nug uas tseem ceeb tshaj plaws rau cov khoom zoo:muab ib qho particle loj faib, dab tsi tiag tau raug tshem tawm?Vim hais tias cov khoom sib txawv ntawm cov kab sib txawv muaj qhov sib txawv ntawm qhov sib txawv, qhov loj me me ntawm cov khoom siv hluav taws xob tshem tawm ncaj qha tswj cov sedimentation efficiency lub tank tuaj yeem ua tiav.
Txhawm rau teb qhov no, cov kws tshawb fawb siv lubtus qauv k-ε turbulence qauv(rau cov dej ntws) ua ke nrog covKev sib xyaw ua ke multiphase qauv(rau cov khoom-kua ob- theem coj tus cwj pwm) - kev sib xyaw ua ke zoo- haum rau simulating cov turbulent, particle-laden ntws nyob rau hauv ib qho chaw khiav dej num.
Cov ntaub ntawv xeem yog lub txee tiag tiag -tam sim no inclined tube settler ntawm cov dej ua haujlwm hauv Anhui Province, nrog rau cov qauv hauv qab no thiab kev ua haujlwm tsis zoo:
| Parameter | Tus nqi | Nco tseg |
| Kev kho muaj peev xwm | 1,000 m³/d | Ib lub tank |
| Tank qhov ntev (L × W × H) | 2.8 m × 2.8 m × 4.17 m | Plaub thaj tsam: sludge, faib, raj, dej ntshiab |
| Tube inclination | 60 degree | Txheem lub kaum sab xis |
| Tube hydraulic txoj kab uas hla | 40 mm | Hexagonal los yog square cell |
| Nthuav tshaj tawm | 0.1 m/s | Nyob rau ntawm phab ntsa perforated faib |
| Influent SS concentration | 295 mg/l | Los ntawm cov ntaub ntawv cog qoob loo |
| Particle ntom ntom | 1,050 kg/m³ | Hom rau flocculated solids |
| Dynamic viscosity | 0.02001 Pa·s | Dej ntawm ~ 20 degree |
TSEEM CEEB 1: QHOV CHAW UA HAUJ LWM NTAWM - thiab yog vim li cas nws tseem ceeb
Tsib particle diameters tau simulated:30, 50, 80, 100, thiab 120 μm. Rau txhua qhov, kev faib tawm ntsug ntawm cov khib nyiab tshem tawm tau tshuaj xyuas los ntawm kev teeb tsa qhov nruab nrab ntim feem ntawm tus ntoo khaub lig- ntu ntawm qhov siab sib txawv (Daim duab 2).
Peb cov qauv tshwm sim los ntawm cov concentration profiles:
1. Txhua qhov loj me me ua raws li cov qauv dav dav.Tag nrho cov duab ntawm qhov concentration-vim- qhov siab nkhaus yog zoo sib xws tsis hais txoj kab uas hla. Lub physics ntawm lub tank - plaub- cheeb tsam qauv, txoj kev ntws, cov turbulence qauv - imposes ib tug ntau concentration profile.
2. Ntawm lub raj inlet (~ 1.5 m qhov siab), concentration spikes sharply rau cov khoom loj.Qhov no yog qhov chaw hloov pauv uas ntws nkag mus rau hauv cov hlab ntsha inclined. Tshav kub thiab kev sib xyaw ua kom muaj qhov siab - thaj tsam concentration uas txhawb cov particle contact thiab flocculation - muaj txiaj ntsig zoo rau kev sib cais ntawm cov kua-kua. Qhov loj dua cov khoom nkag mus rau hauv cheeb tsam no, cov lus tshaj tawm ntau dua qhov kev xav tau.
3. Nyob rau hauv qab lub tank thiab effluent cross-section, particle loj tsav qhov tshwm sim.Nyob ze ntawm thaj chaw sludge, qhov nruab nrab ntim feem ntau nce nrog particle loj - cov khoom loj dua tawm thiab sib sau qhov twg lawv yuav tsum. Ntawm qhov effluent cross-section, qhov nruab nrab ntim feemtxoraws li particle loj nce - tsawg dua cov khoom loj khiav tawm. Qhov sib txawv yog unambiguous:Cov khoom loj dua → ntau dua → ntxuav effluent.
TSEEM CEEB 2: LUB 80 μm THRESHOLD
Kev tshem tawm efficiency η yog txhais raws li:
qhov twg Cnkagyog qhov influent SS concentration (kg / m³) thiab Cqhov hluav taws xobyog SS effluent concentration (kg/m³).
Daim duab 3 qhia txog kev sib raug zoo ntawm kev tshem tawm kev ua haujlwm thiab particle txoj kab uas hla raws li cov kev mob tshwm sim (295 mg/L SS, 1,050 kg/m³ ntom, 0.02001 Pa·s viscosity). Qhov nkhaus tsis linear - nws muaj lub hauv caug txawv.
Cov ntaub ntawv nthuav tawm ob txoj cai:
| Particle Size Range | Cwj pwm | Engineering Implication |
| 30–80 μm | Kev tshem tawm efficiency nce tsuas yog maj mam nrog particle loj. Txoj kev nqes hav yog ntiav. | Coagulant optimization nyob rau hauv no ntau yields diminishing rov qab. Incremental floc loj nce ua me ntsis rau effluent zoo. |
| >80 μm | Kev tshem tawm efficiency nce sharply. Txhua qhov ntxiv 10-20 μm hauv txoj kab uas hla ua rau muaj kev txhim kho tseem ceeb. | Coagulant koob tshuaj, sib xyaw siv, thiab lub sijhawm flocculation yuav tsum tau kho kom thawb flocs dhau 80 μm. Hauv qab no qhov pib, lub tube settler yog underutilized. |
Yog vim li cas yog hydraulic: particles hauv qab 80 μm tau daws qhov nrawm qis txaus uas qhov nce siab hauv cov hlab tuaj yeem nqa lawv tawm, tsis hais seb lub tank tsim tau zoo npaum li cas. Tshaj li 80 μm, qhov kev daws teeb meem tshaj qhov nce siab tshaj plaws los ntawm kev nthuav dav, thiab kev tshem tawm yuav zoo. Lub 80 μm qhov pib yog tshwj xeeb rau lub tank lub geometry thiab kev ua haujlwm (40 hli raj txoj kab uas hla, 60℃inclination, 0.1 m / s inlet tshaj tawm) - tab sis lub hauv paus ntsiab lus siv dav:Txhua lub raj xa dej muaj qhov loj me me hauv qab uas qhov kev tshem tawm tsis zoo, thiab qhov luaj li cas yog txiav txim siab los ntawm qhov siab tshaj plaws hauv cov raj..
Qhov no txhais li cas rau koj cov nroj tsuag
1. Coagulant dosing muaj lub hom phiaj, thiab nws yog 80 μm.Lub hom phiaj ntawm coagulation thiab flocculation - tshaj li neutralizing nqi thiab bridging particles - yog kom loj hlob flocs yav dhau los qhov tseem ceeb loj qhov twg lub raj settler ntes tau lawv. Kev sim lub thawv yuav tsum paub meej tias koj cov flocs tsim tshaj qhov pib txoj kab uas hla rau koj qhov tshwj xeeb tank geometry.
2. Yog tias koj cov dej ntws tawm turbid thiab floc loj yog qis dua, cov hlab tsis yog qhov teeb meem - theem flocculation yog.Ntxiv cov hlab ntsha ntxiv los yog txo qhov siab tshaj plaws yuav pab tau me ntsis. Tab sis qhov kev txhim kho tiag tiag yog ntws: zoo dua flocculation los tsim cov khoom loj dua, cov denser uas cov hlab uas twb muaj lawm tuaj yeem ntes tau.
3. Qhov loj loj yog tank- tshwj xeeb.Qhov kev sim no pom 80 μm rau 40 hli raj ntawm 60℃nrog 0.1 m / s inlet tshaj tawm. Ib txoj kab uas hla me me, lub kaum sab xis, lossis qis dua qhov nrawm yuav hloov qhov chaw pib mus rau hauv qab - txhais tau tias cov khoom me me tuaj yeem tshem tau. Qhov no yog vim li cas raj geometry thiab hydraulic loading tsis yog tsim tsis tau xwb; lawv ncaj qha teeb qhov tsawg kawg nkaus qhov me me uas koj tus neeg tuaj yeem ua tau.
4. CFD simulation yog ib lub tswv yim tsim cuab yeej, tsis yog ib qho kev kawm xyaum.Lub k-ε + Cov qauv sib xyaw ua ke siv ntawm no tuaj yeem kwv yees, rau txhua lub tank geometry thiab kev ua haujlwm, qhov loj me me-tshem tawm kev ua haujlwm nkhaus. Ua ntej tsim lossis rov tsim kho dua tshiab, simulation tuaj yeem teb cov lus nug uas cov kev cai tsim qauv tsis tuaj yeem:Lub tank no puas yuav tshem tawm cov khoom hauv kuv cov dej nyoos?
Xav Tau Tube Settler Media Loj rau Koj Cov Particle Distribution?
Juntai muab PVC thiab PP inclined tube settler media nrog tag nrho hydraulic tsim kev txhawb nqa - nrog rau txoj kab uas hla xaiv, inclination lub kaum sab xis optimisation, thiab deg loading xam matched rau koj raw particle yam ntxwv thiab effluent lub hom phiaj. Yog tias koj tab tom tsim ib tus neeg nyob tshiab lossis teeb meem kev ua haujlwm tsis zoo, peb tuaj yeem pab koj qhia cov raj geometry uas ntes cov khoom koj xav tau tshem tawm.
| Tube Settler Khoom Specs | Thov Hydraulic Design Support | Tag Nrho Cov Khoom Muag |