Fais Fab Kev Kho Dej Ncua Dej
Fais fab nroj tsuag kev kho dej khib nyiab Concept
Kev kho cov dej khib nyiab pov tseg suav nrog kev tswj hwm thiab kho ntau yam khoom siv hluav taws xob tsim tawm thaum lub sijhawm tsim hluav taws xob, feem ntau los ntawm cov txheej txheem txias, flue gas desulfurization (FGD) units, boiler blowdown, thiab tshuaj ntxuav cov txheej txheem. Cov effluents no muaj cov pa phem xws li cov hlau hnyav, cov khib nyiab pov tseg, cov khoom noj khoom haus, thiab cov organic tebchaw, uas yuav tsum tau kho kom ua raws li cov kev cai ntawm ib puag ncig thiab txo cov kev cuam tshuam ecological. Lub hom phiaj tseem ceeb ntawm kev kho cov dej khib nyiab pov tseg yog tshem tawm cov khoom paug, rov ua dua dej yog tias ua tau, thiab xyuas kom muaj kev nyab xeeb ntawm cov khoom siv kho mob.
Cov yam ntxwv ntawm Fais fab nroj tsuag kev kho dej khib nyiab
1. High Suspended Solids: Cov dej khib nyiab los ntawm cov chaw tsim hluav taws xob, tshwj xeeb tshaj yog cov dej txias cua txias thiab FGD effluents, feem ntau muaj cov khoom uas raug tshem tawm, nrog rau cov hlau oxides, silt, thiab cov khoom seem.
2. Muaj Cov Hlau Hnyav: Cov dej khib nyiab fais fab tuaj yeem muaj cov kab hlau zoo li mercury, arsenic, selenium, thiab txhuas, uas ua rau muaj kev phom sij rau ib puag ncig thiab tib neeg kev noj qab haus huv. Cov no feem ntau yog los ntawm cov txheej txheem coal combustion los yog siv cov pa roj flue scrubbers.
3. Salinity and Scaling Compounds: Boiler blowdown and cooling tower blowdown can have high concentrations of dissolved salts, calcium, magnesium, thiab silica, ua rau muaj teeb meem scaling. Qhov siab salinity tuaj yeem cuam tshuam cov txheej txheem kev kho mob lom.
4. Tsawg Organic Load: Piv nrog rau lwm cov dej khib nyiab, fais fab nroj tsuag dej khib nyiab feem ntau muaj qis dua cov organic teeb meem, nrog rau cov tshuaj Chemical Oxygen Demand (COD) thiab Biochemical Oxygen Demand (BOD). Txawm li cas los xij, cov roj thiab cov roj tseem tuaj yeem tshwm sim los ntawm kev siv tshuab lossis khoom siv tu.
5. Kev Kub Kub: Cov dej khib nyiab los ntawm cov txheej txheem txias thiab lub tshuab boiler tuaj yeem ua rau kub siab, uas tuaj yeem cuam tshuam rau kev ua haujlwm ntawm kev kho mob lom.
Cov yam ntxwv ntawm Fais fab nroj tsuag cov txheej txheem dej khib nyiab
1. Kev Kho Mob Tseem Ceeb: Cov theem no suav nrog cov txheej txheem ntawm lub cev thiab tshuaj lom neeg kom tshem tawm cov khib nyiab loj dua thiab kho pH. Clarifiers, sedimentation tanks, thiab lim feem ntau yog siv los tshem tawm cov khib nyiab. Qee zaum, txiv qaub softening los yog coagulation-flocculation yog ua hauj lwm los tshem tawm cov hlau hnyav thiab lwm yam sib xyaw ua ke.
2. Secondary Treatment (Biological Treatment): Cov txheej txheem kev kho mob lom neeg, xws li Moving-Bed Biofilm Reactor (MBBR) los yog cov tshuab ua kom cov sludge, yog siv los degrade cov organic teeb meem, txawm hais tias cov organic load feem ntau tsis tshua muaj zog hauv cov dej khib nyiab. Qee zaum, kev tshem tawm nitrogen los ntawm nitrification thiab denitrification yuav tsum tau yog tias cov khoom noj muaj siab.
3. Tertiary Treatment: Cov txheej txheem Advanced xws li ion pauv, rov qab osmosis (RO), thiab cov txheej txheem oxidation siab heev (AOPs) yog siv los tshem tawm cov ntsev yaj, cov kab hlau, thiab lwm yam kab mob uas tsis tuaj yeem tshem tawm hauv cov theem ua ntej. Membrane filtration kuj tseem siv tau los tswj cov khoom zoo thiab cov khoom siv rov ua dua tshiab.
4. Zero Liquid Discharge (ZLD) Systems: Ntau lub tuam txhab hluav taws xob tsom rau ZLD, qhov twg cov dej khib nyiab raug kho thiab rov siv dua hauv cov nroj tsuag, txo cov paug tawm. Qhov no suav nrog cov thev naus laus zis zoo li evaporation thiab crystallization kom tshem tawm tag nrho cov kua dej ntxiv.
5. Sludge tuav: Sludge generated los ntawm cov txheej txheem kev kho mob (xws li, hlau precipitates, txiv qaub sludge) yuav tsum stabilized thiab muab pov tseg, feem ntau yuav tsum tau thickening, dewatering, thiab pov tseg kev nyab xeeb kev xyaum vim muaj cov tshuaj lom hlau.
Qhov yuav tsum tau tshwj xeeb rau MBBR Media Thaum Siv Hauv Cov Khoom Siv Hluav Taws Xob Hluav Taws Xob rau Kev Siv Hluav Taws Xob Hluav Taws Xob Hluav Taws Xob
1. High Surface Area for Microbial Growth: MBBR media yuav tsum muab thaj chaw loj los txhawb microbial biofilms uas muaj peev xwm degrading organic teeb meem thiab, yog tias xav tau, hloov cov nitrogen tebchaw. Txawm hais tias lub zog cog cov dej khib nyiab muaj cov ntsiab lus ntawm cov organic qis, cov xov xwm tseem yuav tsum txhawb nqa microbial kev ua tau zoo.
2. Thermal thiab Chemical Resistance: Vim yog qhov kub thiab txias thiab muaj peev xwm ua rau cov tshuaj lom neeg tsis zoo (xws li, los ntawm FGD cov dej khib nyiab lossis lub tshuab boiler), MBBR xov xwm yuav tsum tau thermally ruaj khov thiab tiv taus corrosion los ntawm cov tshuaj xws li sulfates thiab chlorides. High-density polyethylene (HDPE) los yog cov ntaub ntawv zoo sib xws feem ntau yog siv.
3. Kev them nyiaj yug rau Nitrification thiab Denitrification: Nyob rau hauv cov ntaub ntawv uas cov dej khib nyiab muaj nitrogen tebchaw (xws li, ammonia los ntawm FGD), MBBR xov xwm yuav tsum txhawb kev loj hlob ntawm tshwj xeeb microbial zej zog rau nitrification thiab denitrification txheej txheem. Kev faib tawm cov pa oxygen kom zoo nyob rau hauv biofilm yog qhov tseem ceeb los xyuas kom muaj kev tshem tawm nitrogen kom zoo.
4. Tsawg Fouling thiab Durability: Cov xov xwm yuav tsum tiv thaiv fouling los ntawm cov khib nyiab tshem tawm, scaling compounds, thiab tej yam khoom uas muaj nyob rau hauv cov dej khib nyiab. Qhov no ua kom ntseeg tau tias cov xov xwm tseem muaj txiaj ntsig zoo nyob rau lub sijhawm tsis muaj kev saib xyuas tsis tu ncua. Cov xov xwm ntev ntev uas muaj peev xwm tiv taus kev ua haujlwm hnyav yog qhov tseem ceeb.
5. Adaptability rau Variable Flows thiab Loads: Fais fab nroj tsuag dej khib nyiab kho tshuab muaj peev xwm muaj variations ntawm ntws thiab pa phem concentrations, tshwj xeeb tshaj yog thaum lub sij hawm ua hauj lwm ncov. MBBR media yuav tsum yoog raws cov kev hloov pauv no, tswj kev ua haujlwm zoo ib yam raws li qhov sib txawv ntawm hydraulic loads.
Xaus
Fais fab nroj tsuag kev kho dej khib nyiab yog qhov tseem ceeb rau kev tswj cov khoom siv sib txawv uas tau tsim thaum lub zog tsim hluav taws xob, suav nrog cov hlau hnyav, cov khib nyiab tshem tawm, thiab cov ntsev ntsev. Cov txheej txheem kev kho mob feem ntau suav nrog kev sib xyaw ntawm lub cev, tshuaj, thiab cov txheej txheem lom neeg, nrog MBBR thev naus laus zis ua lub luag haujlwm hauv kev kho mob thib ob rau kev tshem tawm cov organic thiab cov as-ham. Kev vam meej ntawm MBBR txheej txheem yog nyob ntawm cov yam ntxwv ntawm kev tshaj tawm, uas yuav tsum muaj thaj chaw siab rau kev loj hlob microbial, tiv taus qhov kub thiab txias thiab tshuaj lom neeg, thiab tiv thaiv fouling. Los ntawm kev xaiv MBBR cov xov xwm tsim nyog, cov dej khib nyiab pov tseg tuaj yeem kho tau zoo kom ua tau raws li cov qauv kev tso tawm ib puag ncig, txhawb nqa dej rov ua dua tshiab, thiab txo qis cov nroj tsuag ecological hneev taw.