Kawm txog lub nroog sludge drying yam ntxwv

Noj cov dewatering sludgentawm Qingpu District Municipal Kev kho dej phwj tuaj Cog raws li raw khoom, daim ntawv no kawm txog qhov sib txawv ntawm cov yam ntxwv ntawm sludge ua ntej thiab tom qab ziab los ntawm cov yam ntxwv ntawm industrial tsom xam, micromorphology, yooj yim muaj pes tsawg leeg thiab calorific nqi, thiab muab cov ntaub ntawv yooj yim rau lub realization ntawm qhuav thiab incineration ntawm sludge.

Sludge yog ib yam khoom los ntawm txheej txheem kho dej phwj tuaj, nrog cov ntsiab lus dej siab (feem ntau txog 98%), ntim loj, tsis yooj yim rau kev pov tseg ntawm cov yam ntxwv, thiab sludge muaj pes tsawg leeg yog complex, muaj ntau cov organic tshuaj, hnyav hlau, ntsev, nyuaj rau degrade tshuaj thiab cov kab mob pathogenic microorganisms, parasitic qe thiab lwm yam. Nrog rau qhov tob ntawm kev kho dej phwj tuaj, kev kho kom tsim nyog thiab pov tseg cov sludge yog qhov tseem ceeb zuj zus, thiab cov sludge tsis kho yog qhov kev hem thawj loj rau ib puag ncig.

Raws li cov ntaub ntawv ntawm E20 Kev Tshawb Fawb Lub Tsev Haujlwm, ntau tshaj li ib nrab ntawm cov sludge tsim los ntawm cov chaw kho dej phwj yog kho thiab pov tseg los ntawm kev tsis huv, thiab ntau dua 18% ntawm cov sludge ploj. Ntau tshaj 50% ntawm cov dej ntsiab lus ntawm 80% ntawm dewatered sludge yog pov tseg los ntawm txoj kev yooj yim ntawm kev pov tseg. Txoj kev pov tseg no tsis yog tsuas yog muaj kev ua qias tuaj ib puag ncig, tab sis kuj nyob hauv thaj chaw loj, thiab yuav tsis muaj av rau faus rau lub sijhawm ntev. Lub tswv yim ntawm Kev kho Sludge thiab cov kev cai pov tseg hauv "Dej Kaum" thiab "13th Tsib Xyoo Plan" tau txhawb nqa kev loj hlob ntawm sludge kev kho mob thiab kev lag luam pov tseg raws li cov cai zoo, thiab cov cuab yeej siv kho mob thiab cov cuab yeej siv tau zoo kuj tau tsim sai heev.

"Cov txheej txheem kev ua tau zoo tshaj plaws rau SLUDGE kev kho thiab pov tseg hauv cov dej phwj tuaj kho" ntseeg tias sludge ziab thiab incineration yog cov kev taw qhia uas tau tawm tswv yim los ntawm peb lub teb chaws yav tom ntej. Txhawm rau kom paub cov sludge kom qhuav thiab incineration nrog kev ua haujlwm siab thiab kev siv hluav taws xob tsawg, nws yog ib qho tsim nyog yuav tsum tau kawm txog cov yam ntxwv ntawm cov sludge ua ntej thiab tom qab ziab los ntawm ntau lub ces kaum.

Nyob rau hauv daim ntawv no, cov yam ntxwv ntawm lub cev qhuav dej sludge ua ntej thiab tom qab ziab tau kawm los ntawm cov yam ntxwv ntawm kev tsom xam, micromorphology, yooj yim muaj pes tsawg leeg thiab calorific tus nqi, uas muab cov ntaub ntawv yooj yim rau lub realization ntawm qhuav thiab incineration ntawm sludge.

Cov cuab yeej sim

Lub nroog dewatering sludge yog ziab los ntawm kev siv lub tshuab ziab khaub ncaws nyias, thiab cov qauv duab ntawm lub tshuab ziab khaub ncaws nyias yog qhia hauv daim duab. Nyias zaj duab xis ziab tshuab yog tsim los ntawm lub plhaub, rotor thiab tsav tsheb. Lub rotor kis cov sludge lub cev qhuav dej mus rau hauv ib txheej nyias ntawm cov phab ntsa sab hauv ntawm lub plhaub lub tsho, thiab dries cov sludge los ntawm cov kub kub los yog cov roj hluav taws xob kub hauv lub tsho.

Kev txheeb xyuas yooj yim thiab sib piv ua ntej thiab tom qab sludge ziab

Lub overheated chav ntawm 160 ℃ thiab 0.6Mpa tau dhau mus rau hauv lub tshuab ziab khaub ncaws nyias kom qhuav cov sludge dewatered nrog cov dej noo ntawm li 80% mus rau cov dej noo tsawg dua 30%. Cov sludge ua ntej thiab tom qab ziab tau raug kuaj thiab tshuaj xyuas ntau zaus. Cov txiaj ntsig tau pom tias cov ntsiab lus tsis hloov pauv ntawm cov sludge tau txo qis tom qab ziab, thiab cov ntsiab lus tsis hloov pauv ntawm lub hauv paus ziab tau txo los ntawm 4.53% ~ 8.66%. Nyob rau tib lub sijhawm, cov hmoov tshauv ntawm cov sludge tau nce, thiab cov calorvalue siab ntawm lub hauv paus ziab poob los ntawm 0.335 ~ 1.15MJ / kg. Qhov no feem ntau yog vim hais tias nyob rau hauv tus txheej txheem ntawm thermal drying, volatile organic tebchaw nyob rau hauv cov sludge thiab ib co zoo sludge hais los ua lub qhuav tail gas ua ke nrog cov qhuav dej vapor thiab nkag mus rau tom qab tail gas kho seem.

Kev sib piv microstructure ntawm sludge ua ntej thiab tom qab ziab

Cov duab hauv qab no qhia txog microstructure ntawm cov sludge ua ntej thiab tom qab ziab. Raws li tuaj yeem pom los ntawm daim duab, cov qauv sludge ua ntej ziab yog qhov xoob, thiab ntau cov khoom siv hluav taws xob ntxiv tau qhwv thiab sib sau ua ke sab nraum lub colloid, tsim cov qauv tsim kom pom tseeb. Nyob rau hauv txoj kev no, cov dej khi, dej interstitial thiab dej intracellular hauv cov sludge yog qhwv hauv cov sludge floc, yog li nws nyuaj rau lub cev qhuav dej ntxiv los ntawm kev ua haujlwm ntawm lub cev thiab tshuaj. Piv nrog cov sludge tom qab ziab, cov sludge ua ntej ziab muaj qhov porosity ntau dua, qhov loj dua qhov chaw tshwj xeeb, muaj zog compressibility, thiab cov sludge floc tuaj yeem raug rhuav tshem los ntawm kev siv cov tshuab hluav taws xob qis lossis muab cua sov. Nrog rau cov evaporation ntawm cov dej nyob rau hauv cov sludge, cov sludge floc qauv maj vau, tsim ib tug aggregate qauv nrog ib tug nruj qauv nto thiab maj shrinking voids nyob rau hauv daim duab ntawm sab xis. Txawm li cas los xij, dej evaporation efficiency kuj yuav txo qis nrog qhov txo qis ntawm sludge void ratio.

Kev sib piv ntawm cov sludge ua ntej thiab tom qab ziab

Daim duab qhia cov txiaj ntsig ntawm infrared spectral scanning tsom xam ua ntej thiab tom qab sludge ziab. Cov neeg sawv cev ua haujlwm ntawm sludge qhuav pab pawg feem ntau yog dawb H2O, -OH, -CH2, -CH3, aromatic nplhaib, C = C, CO, halogenated hydrocarbon, thiab lwm yam. Cov kev tshawb fawb tau pom tias cov ntsiab lus protein ntawm sludge organic teeb meem ntau dua 60%, lipid yog li 20%, cov hmoov txhuv nplej siab thiab cellulose yog li 15%, qhov decomposition ntawm cov organic teeb meem no yuav tsim NH3, H2S thiab VOCs thiab lwm yam ntxhiab gases.

EPS yog ib lub siab polymer uas muaj cov protein, polysaccharide thiab ib qho me me ntawm lipids, nucleic acid thiab humus. Kev kuaj pom ntawm EPS cov yam ntxwv sib xyaw ua ke qhia tias muaj ntau ntawm EPS hauv sludge. Raws li ib qho tseem ceeb ntawm cov organic sludge, EPS cov ntsiab lus txiav txim siab qhov nqus infrared siv ntawm sludge yam ntxwv ua haujlwm. Los ntawm kev sib piv cov infrared spectra ntawm cov sludge ua ntej thiab tom qab ziab thiab tsis suav nrog cov kev cuam tshuam me me ntawm cov impurities hauv cov sludge thaum lub sij hawm kev soj ntsuam, nws tuaj yeem pom tau tias qhov infrared absorption siv ntawm cov sludge ua ntej ziab yog ntau dua li cov sludge tom qab ziab. Piv nrog rau cov sludge ua ntej ziab, qhov spectra ntawm cov sludge tom qab ziab tau pom tias lub xub pwg peaks ntawm 1654 thiab 1543cm-1 (C = C), 2924cm-1 (CH) thiab 1076cm-1 (CO) yog me me, uas qhia tau hais tias decomposition ntawm protein zoo li tshuaj thaum lub sij hawm qhuav. Qhov no kuj piav qhia txog qhov txo qis hauv cov ntsiab lus organic thiab cov ntsiab lus tsis haum xeeb tom qab sludge qhuav.

Kev sib piv ntawm cov dej noo, cov teeb meem organic thiab calorific nqi ntawm sludge ua ntej thiab tom qab ziab

Cov organic teeb meem nyob rau hauv cov sludge yog lub ntsiab muab kev pab cuam ntawm lub calorvalue ntawm cov sludge, thaum lub moisturizing cov ntsiab lus ntawm sludge kuj tseem muaj feem xyuam rau lub calorvalue. Qhov siab noo noo cov ntsiab lus ntawm sludge muaj qis qis calorific nqi, uas yuav inevitably cuam tshuam rau incineration ntawm sludge. Tsis tas li ntawd, lub zog siv hluav taws xob hauv cov txheej txheem sludge ziab yog tsuas yog siv los evaporate cov dej hauv cov sludge.

Cov organic teeb meem cov ntsiab lus ntawm cov sludge tom qab ziab poob qis me ntsis, thiab qhov sib thooj siab calorification tus nqi ntawm lub hauv paus qhuav kuj poob me ntsis. Kev sib raug zoo ntawm sludge noo noo cov ntsiab lus thiab calorie-tus nqi, thiab kev sib raug zoo ntawm sludge organic teeb meem thiab calorie-tus nqi tau kawm raws li, thiab kev sib txheeb coefficient ntawm cov hloov pauv tau los ntawm linear regression, thiab kev txheeb xyuas kev sib raug tau ua.

Muaj qhov cuam tshuam tsis zoo ntawm cov dej noo ntawm cov sludge qhuav thiab nws cov nqi qis calorific, uas txo qis nrog qhov nce ntawm cov dej noo. Txawm li cas los xij, qhov sib txheeb coefficient ntawm cov dej qhuav sludge noo noo thiab qis calorage tus nqi yog 0.882, thiab P tus nqi ntawm F test yog 0.061 hauv qab 95% kev ntseeg siab. Txij li thaum F-test P tus nqi ntau dua 0.05, cov dej noo ntawm cov sludge qhuav tsis qhia qhov tseem ceeb ntawm kev sib raug zoo nrog tus nqi qis.

Qhov sib txheeb coefficient ntawm cov organic teeb meem cov ntsiab lus ntawm cov sludge nyoos thiab cov calorie ntau ntau ntawm cov hauv paus qhuav yog 0.997, thiab P tus nqi ntawm F test yog 0.0033 nyob rau hauv kev ntseeg siab ntawm 95%. F test P tus nqi tsawg dua 0.05, yog li cov organic teeb meem cov ntsiab lus ntawm cov sludge nyoos muaj qhov cuam tshuam tseem ceeb nrog nws lub hauv paus qhuav muaj calorie-tus nqi.

Cov organic teeb meem cov ntsiab lus ntawm qhuav sludge tau zoo correlated nrog lub siab calorific nqi ntawm qhuav puag, thiab lub siab calorific nqi ntawm qhuav puag nce nrog nce ntawm cov organic teeb meem cov ntsiab lus. Ntxiv mus, qhov sib txheeb coefficient ntawm cov organic teeb meem ntawm cov sludge qhuav thiab cov calorage siab ntawm qhuav substrate yog 0.973, thiab P tus nqi ntawm F test yog 0.014 nyob rau hauv kev ntseeg siab ntawm 95%. Txij li thaum F-test p-tus nqi tsawg dua 0.05, nws tuaj yeem pom tias muaj kev sib raug zoo ntawm cov organic teeb meem cov ntsiab lus ntawm cov sludge qhuav thiab cov calorie ntau ntau ntawm cov hauv paus qhuav.

Los ntawm kev soj ntsuam saum toj no, nws tuaj yeem pom tias tus nqi calorage ntawm sludge yog ze ze rau cov ntsiab lus ntawm cov dej noo thiab cov ntsiab lus organic, thiab muaj kev sib raug zoo ntawm cov organic teeb meem cov ntsiab lus ntawm sludge thiab calorage tus nqi ntawm sludge qhuav puag. Qhov no kuj qhia tau hais tias yog ib tug loj tus naj npawb ntawm inorganic additives yog siv rau txias thiab lub cev qhuav dej ntawm cov sludge los ntawm cov dej phwj tuaj kho cov nroj tsuag, txawm hais tias nws muaj peev xwm ua si ib tug tseem ceeb lub cev qhuav dej, qhov kev taw qhia ntawm ib tug loj tus naj npawb ntawm inorganic tshuaj yuav tsis tau tsuas yog txhim kho lub system load ntawm cov sludge qhuav txheej txheem, tab sis kuj txo cov organic teeb meem cov ntsiab lus ntawm cov adversely cuam tshuam rau cov subsection ntawm sludge. incineration.

Xaus

Nyob rau hauv daim ntawv no, cov yam ntxwv ntawm lub dehydrated sludge ua ntej thiab tom qab ziab tau soj ntsuam los ntawm kev siv lub dehydrated sludge los ntawm Qingpu District ntawm Shanghai raws li raw khoom.

(1) Nrog rau kev ua tiav ntawm kev ziab, cov qauv ntawm cov sludge yog maj mam kaw, qhov sib txawv yog maj mam txo, thiab qhov ziab kom qhuav yog maj mam txo.

(2) Cov txheej txheem ziab ntawm cov sludge yuav tshwm sim me me ntawm cov organic teeb meem decomposition, yog li cov ntsiab lus ntawm cov organic teeb meem thiab cov teeb meem tsis zoo ntawm cov sludge tom qab ziab yog me ntsis txo.

(3) Qhov qis calorage tus nqi ntawm sludge yog tsis zoo correlated nrog nws cov ntsiab lus noo noo, tab sis tsis muaj kev sib raug zoo linear; Muaj ib qho zoo linear correlation ntawm tus nqi siab calorage ntawm sludge thiab nws cov ntsiab lus organic. Yog li ntawd, nws yog ib qho tsim nyog los txo cov dej noo ntawm cov sludge thiab txo qhov poob ntawm cov organic teeb meem hauv cov sludge kom ntseeg tau tias cov calorvalue ntawm cov sludge.