Inclined Tube Settler Hydraulic Tsim: Kho V₁–V₂ Kev nrawm tsis sib haum uas ua rau koj Flocs|Juntai

Koj tau ntsuas koj lub raj inclined kom raug. Qhov siab tshaj plaws yog nyob rau hauv cov ntaub ntawv ntau yam. Qhov koob tshuaj coagulant yog lawm. Thiab tseem - thawj peb ntawm lub tank tsim turbid effluent thaum tus so khiav ntshiab. Cov flocs tawgtsis nyob rau hauv lub flocculation tank, tab sis ntawm qhov pom tsis pom qhov twg qhov kev faib tawm - cheeb tsam dej slams rau hauv cov raj inlets ntawm qhov nrawm poob ntau dua 90%. Qhov no tsis yog teeb meem tshuaj. Nws yog qhov teeb meem tsim hydraulic - thiab nws muaj qhov tseeb, kho tau.

LUB SIJ HAWM NTAWM NTAWM LUB TUBE ENTRANCE

Nyob rau hauv ib tug inclined tube settler, ob velocities tswj txhua yam:

V₁ - Distribution ceev:kab rov tav ceev uas cov dej mus los ntawm qhov chaw faib khoom hauv qab cov hlab, ntawm nws txoj kev mus rau muab faib mus rau hauv lub raj nras.

V₂ - Upward ceev:Qhov nce ntsug ntawm cov dej hauv cov raj inclined lawv tus kheej, feem ntau 1.5-4.5 mm / s hauv Suav xyaum.

Ntawm no yog qhov teeb meem feem ntau cov neeg tsim qauv nco. Nyob rau hauv pem hauv ntej kawg ntawm lub settler, dej nkag mus rau hauv cov hlab ntawm ceev V₁ thiab yuav tsum tam sim ntawd decelerate rau roughly V₂/sin60℃- cov khoom ntawm upward tshaj tawm raws lub raj axis. Vim V₁ feem ntau yogob peb zaug mus tshaj kaum zaugntau dua V₂/sin60 degree, cov dej tau ntsib qhov kev poob qis90% los yog ntau tshaj nyob rau hauv qhov kev ncua deb ntawm centimeters, thaum tib lub sijhawm tig 90℃(lossis 120℃nyob ntawm qhov kev taw qhia ntws) rau hauv cov hlab.

Qhov no tsim ib qho kev nrawm nrawm nrawm ntawm qhov kev faib tawm - cheeb tsam - mus rau - raj interface. Cov flocs tuaj txog ntawm lub tank flocculation yog loj, xoob, thiab cov khoom tawg yooj yim - lawv shear resistancetxo qis thaum lawv loj zuj zus. Ntaus lawv nrog 90% nrawm nrawm thiab tig 90 degree, thiab lawv tawg. Thaum tawg lawm, lawv tsis rov- daim ntawv. Cov khoom zoo tso tawm rau hauv lub raj ces tsis muaj sij hawm nyob rau hauv qhov ntev ntawm 1-meter raj, thiab lawv tawm raws li turbidity.

Cov tsos mob qhia:turbid effluent tsuas yog los ntawm thawj cov hlab, tshem tawm mus rau qhov kawg. Qhov no yog vim V₁ txo qis raws txoj kev ntws raws li cov dej tau nce mus rau hauv cov raj - tsawg dua thiab cov dej tsawg dua nyob hauv thaj chaw faib khoom, yog li cov kab rov tav tshaj tawm ib txwm poob. Lub caij no, V₂ / sin60℃hauv cov hlab ntsha nyob twj ywm qhov tseem ceeb ntawm qhov nkag mus rau qhov hluav taws xob. Lub nrawm gradient ntawm lub interface yog li tsis muaj zog raws li lub tank ntev, floc breakage diminishes, thiab effluent clears. Yog tias tag nrho lub tank turbid, koj yuav xav tias ntau dhau V₂. Tab sis pem hauv ntej- kawg- tsuas yog cov ntsiab lus turbidity square ntawm V₁–V₂ mismatch.

TXOJ CAI V₁ THIAB V₂ RIGHT

Cov qauv tsim tau zoo- tsim, tab sis lawv cov kev sib cuam tshuam yog qhov tseem ceeb:

V₂ yuav tsum tau xaiv raws li cov dej tsis zoo, lub hom phiaj evaporation turbidity, dej kub, coagulant hom thiab koob tshuaj, thiab raj txoj kab uas hla thiab ntev. Qhov qis dua V₂, qhov zoo dua cov dej ntws tawm - tab sis ntawm tus nqi peev. Txoj kev tsim qauv tseem ceeb yog ua kom V₁ nyob qis qis ntawm lub qhov hluav taws xob flocculation lub qhov hluav taws xob thiab nyob rau hauv 0.02-0.05 m / s band, yog li V₁ → V₂ / sin60℃hloov ntawm lub raj nkag tsis dhau los ua floc guillotine.

LUB L/B RATIO: Ib qho qauv uas tiv thaiv qhov kawg -Zone overload

Thaum xaiv V₁ thiab V₂, lub tank proportions ua raws los ntawm ib qho kev sib raug zoo:

V₁ × B = V₂ × L

Qhov twg B yog qhov dav ntawm lub tank (qhov dav ntawm lub raj ntim) thiab L yog lub tank ntev nyob rau hauv cov kev taw qhia ntws. Cov qauv no ua kom ntseeg tau tias tag nrho cov dej ntws nkag mus rau hauv thaj chaw faib khoom hla- ntu sib npaug ntawm tag nrho cov dej ntws tawm los ntawm cov raj - tiv thaiv kev tsis sib xws ntawm hydraulic qhov twg lub taub hau ntawm qhov kawg hloov mus rau lub zog muaj peev xwm thiab overloads cov raj kawg.

Qhov kev faib cheeb tsam qhov siab kuj tseem ceeb. Nws yuav tsum muaj peev xwm ua kom tus ntoo khaub lig inlet -section tshaj tawm hauv qab 0.02–0.05 m / s (tsis suav qhov siab nyob los ntawm cov khoom sib xyaw ntxhib). Rau mechanically ntxuav tank, qhov tsawg kawg nkaus faib cheeb tsam qhov siab ntawm1.6 mpom zoo. Thaum qhov siab no tau kho thiab B txiav txim siab los ntawm V₁, L ua raws ncaj qha los ntawm cov mis - thiab qhov txiaj ntsig L / B piv yog hydraulically suab.

REAL-NWS PROOF: SHUNDE LONGJIANG DEJ NPAJ

Cov mis tsis yog theoretical. Thaum Shunde Longjiang Water Plant tsim 20,000 m³ / d inclined tube settler, pab neeg tsim kom txhob txwm sib tw V₁ thiab V₂ thiab siv V₁×B=V₂×L los txiav txim qhov ntev ntawm lub tank. Qhov tshwm sim qhov ntev - rau - dav piv yog0.65.

Cov txiaj ntsig tau tshaj qhov kev cia siab. Tsis tsuas yog lub tank ua tau flawlessly ntawm nws lub peev xwm tsim ntawm 20,000 m³ / d - thaum tsim khoom raug thawb mus rau40,000 m³ / d (ob npaug ntawm tus qauv tsim), effluent quality tseem zoo heev. Tib txoj hauv kev txij li tau raug txheeb xyuas hauv ntau qhov kev tsim cov nroj tsuag dej tom ntej.

TSEEM CEEB

1.Khaws V₁ ntawm 0.02-0.05 m / s thiab tsis txhob siab tshaj qhov flocculation tank qhov hluav taws xob tshaj tawm. Yog tias koj pom pem hauv ntej- kawg- tsuas yog turbidity hauv chav ua haujlwm, V₁ yog thawj tus neeg raug liam.

2.Xaiv V₂ hauv 1.5–4.5 mm / s raws li cov yam ntxwv ntawm cov dej nyoos thiab cov hom phiaj effluent. qis dua yog kev nyab xeeb; siab xav tau zoo floc zog.

3.Siv V₁×B=V₂×L los txiav txim siab tank proportions. Qhov no tiv thaiv deb -kawg hydraulic overload thiab ua kom cov raj xa dej tsis sib xws.

4.Khaws thaj chaw faib khoom qhov siab tsawg kawg yog 1.6 m rau cov tshuab ntxhua khaub ncaws, thiab xyuas kom meej tias qhov nkag nkag mus -section ceev nyob rau hauv 0.02–0.05 m / s band.

5.Nco ntsoov: tag nrho - tank turbidity qhia txog V₂ teeb meem. Pem hauv ntej- kawg- tsuas yog turbidity qhia txog V₁ teeb meem. Cov tsos mob qhia rau koj saib qhov twg.