Roj Refining Wastewater Treatment
Roj refining wastewater kho Concept
Roj refining dej khib nyiab yog tsim los ntawm ntau yam txheej txheem hauv refineries, nrog rau kev ua cov roj crude, desalting, distillation, thiab catalytic cracking. Cov dej khib nyiab muaj ntau yam kuab paug xws li hydrocarbons, tshem tawm cov khib nyiab, cov hlau hnyav, sulfides, phenols, thiab lwm yam organic compounds, uas tuaj yeem muaj kev cuam tshuam rau ib puag ncig yog tias tsis kho kom raug.
Lub hom phiaj ntawm kev kho cov roj refining cov dej khib nyiab yog tshem tawm cov kab mob tsis zoo kom ua tau raws li cov cai tswj kev txwv, tiv thaiv ib puag ncig kev puas tsuaj, thiab rov ua dej thaum ua tau. Kev sib xyaw ua ke ntawm lub cev, tshuaj, thiab kev kho mob lom neeg feem ntau yog ua haujlwm los daws qhov nyuaj ntawm cov dej khib nyiab.
Cov yam ntxwv ntawm Roj refining wastewater kho
1. Cov Organic Load: Cov roj refining cov dej khib nyiab feem ntau muaj cov kua roj carbon dioxide siab thiab dispersed, xws li benzene, toluene, thiab xylene, uas ua rau muaj kev xav tau siab rau Chemical Oxygen Demand (COD) thiab Biochemical Oxygen Demand (BOD).
2. Kev muaj cov tshuaj lom neeg: Cov dej khib nyiab muaj cov tshuaj lom neeg lom neeg xws li phenols thiab polycyclic aromatic hydrocarbons (PAHs), nrog rau cov hlau hnyav (xws li mercury, lead, thiab cadmium), uas tuaj yeem ua mob rau cov txheej txheem kev kho mob lom.
3. High Suspended Solids: Vim muaj cov sludge, tshem tawm cov khib nyiab, thiab cov roj emulsified, cov txheej txheem kev kho mob yuav tsum tau hais txog ob qho tib si lub cev sib cais ntawm cov khib nyiab thiab kev tawg ntawm cov pa phem.
4. Kev hloov pauv hauv Cov Txheej Txheem: Cov yam ntxwv ntawm cov dej khib nyiab tuaj yeem sib txawv raws li kev ua haujlwm ntawm lub tshuab ua kom zoo, xav tau cov txheej txheem kho kom haum xeeb uas tuaj yeem tswj tau qhov sib txawv ntawm pH, salinity, thiab cov pa paug.
5. Tsawg Biodegradability: Muaj ntau lub tebchaw hauv cov roj refinery cov dej khib nyiab yog qhov nyuaj rau biodegrade, uas ua rau kev kho mob lom neeg nyuaj dua piv rau cov dej khib nyiab ntau dua.
Cov yam ntxwv ntawm Roj refining wastewater kho txheej txheem
1. Kev kho thawj zaug: Thawj kauj ruam feem ntau muaj cov txheej txheem ntawm lub cev xws li cov roj-dej separators (xws li API cais), yaj huab cua flotation (DAF), thiab cov tso tsheb hlau luam tawm kom tshem tawm cov roj dawb, tshem tawm cov khib nyiab, thiab qee cov hlau hnyav.
2. Secondary Treatment (Biological Treatment): Qhov no yog qhov uas Moving-Bed Biofilm Reactor (MBBR) los yog cov txheej txheem activated sludge tuaj ua si. MBBR, tshwj xeeb tshaj yog, tuaj yeem tuav cov khoom hnyav hnyav, tiv taus cov tshuaj lom, thiab yuav tsum muaj qhov chaw tsawg dua li cov qauv siv. Nws siv biofilm-pob yas xov xwm los degrade organic pollutants, hloov lawv mus rau carbon dioxide thiab dej.
3. Kev Kho Mob Tertiary: Cov txheej txheem siab tshaj plaws xws li membrane pom (piv txwv li, ultrafiltration, rov qab osmosis), tshuaj oxidation, thiab activated carbon adsorption yog ua hauj lwm los tshem tawm cov seem yaj, tshwj xeeb tshaj yog recalcitrant organics thiab kab hlau.
4. Sludge tuav: Refineries tsim cov sludge tseem ceeb, uas yuav tsum tau ruaj khov thiab pov tseg kom zoo. Dewatering, thickening, thiab incineration yog ib txoj kev kho sludge.
Cov Kev Xav Tau Tshwj Xeeb rau MBBR media Thaum Siv Hauv Cov Khoom Siv Hluav Taws Xob Hluav Taws Xob rau Roj refining dej khib nyiab
1. High Deg Cheeb Tsam: MBBR xov xwm siv nyob rau hauv cov roj refining wastewater kho yuav tsum muab ib tug loj deg cheeb tsam rau biofilm txuas mus rau optimize microbial kev ua si thiab cov pa phem degradation. Cov xov xwm yuav tsum txhawb txoj kev loj hlob ntawm cov kab mob tshwj xeeb uas muaj peev xwm rhuav tshem cov hydrocarbons thiab lwm cov organics nyuaj.
2. Resistance rau Fouling: Vim yog cov roj siab thiab cov khoom raug tshem tawm, cov xov xwm yuav tsum tiv taus fouling thiab clogging. Qhov no ua kom ntseeg tau tias biofilm tseem ua haujlwm thiab cov txheej txheem kho tau zoo yam tsis muaj kev tu ntau zaus lossis hloov cov xov xwm.
3. Durability nyob rau hauv Hnyav tej yam kev mob: Cov xov xwm yuav tsum tau tiv thaiv variations nyob rau hauv pH, salinity, thiab kub uas yog ib yam ntawm cov roj refinery dej khib nyiab. Cov ntaub ntawv muaj zog, tshuaj lom neeg ruaj khov zoo li cov khoom siv high-density polyethylene (HDPE) feem ntau siv.
4. Muaj txiaj ntsig Aeration: Cov xov xwm yuav tsum sib haum nrog lub tshuab aeration hauv cov tso tsheb hlau luam kom paub tseeb tias cov pa oxygen hloov tau zoo, uas yog qhov tseem ceeb rau cov kab mob aerobic uas ua rau cov pa phem. Media nrog cov dej ntws zoo dynamic txhim kho cov pa oxygen thoob plaws hauv lub reactor.
5. Adaptability rau Toxic Shocks: Roj refinery cov dej khib nyiab tuaj yeem muaj qee zaus muaj cov tshuaj lom neeg sib txuas. MBBR media thiab nws cov biofilm cuam tshuam yuav tsum ua kom muaj zog rau cov kev cuam tshuam no, tswj kev ua haujlwm lom neeg txawm tias muaj kev ntxhov siab.
Xaus
Cov roj refining cov dej khib nyiab yog qhov nyuaj, yuav tsum muaj kev sib xyaw ua ke ntawm lub cev, tshuaj, thiab cov txheej txheem lom neeg kom tshem tawm cov kab mob xws li hydrocarbons, cov hlau hnyav, thiab lwm yam tshuaj lom. Kev siv MBBR thev naus laus zis hauv cov roj av aeration tso tsheb hlau luam muab cov kev daws teeb meem zoo rau kev tuav cov organic load thiab hloov pauv ntawm cov roj refinery dej khib nyiab. Txawm li cas los xij, kev ua tiav ntawm MBBR system nyob ntawm qhov hnyav ntawm cov khoom siv xov xwm. MBBR xov xwm yuav tsum tiv taus fouling, ruaj khov, muab thaj chaw siab, thiab txhawb nqa oxygen hloov tau zoo, ua kom nws zoo rau cov teeb meem nyuaj ntawm cov roj refinery dej khib nyiab.