1. Tsim thiab cov khoom tseem ceeb ntawm cov tshuaj tsuag xim khib nyiab
Cov txheej txheem pleev xim yog dav siv hauv tshuab, tsheb, khoom siv hluav taws xob, khoom siv hauv tsev, nkoj, rooj tog thiab lwm yam lag luam.
Xim cov khoom siv raw —— xim yog tsim los ntawm cov khoom tsis-volatile thiab volatile, uas tsis yog-volatile nrog rau cov khoom siv yeeb yaj kiab thiab cov khoom siv yeeb yaj kiab, tus neeg sawv cev tsis muaj zog yog siv los dilute cov xim, kom ua tiav lub hom phiaj ntawm cov xim zoo nkauj.
Cov txheej txheem tshuaj pleev xim feem ntau ua rau cov xim pos huab thiab cov pa phem hauv cov pa phem, xim nyob rau hauv qhov kev txiav txim siab ntawm kev kub siab rau hauv cov khoom, thaum txau, ib feem ntawm cov xim tsis tuaj yeem ncav cuag qhov chaw tshuaj tsuag, diffusion nrog airflow los tsim cov xim pos huab; organic pov tseg roj los ntawm volatilization ntawm diluent, organic solvent tsis txuas rau cov xim nto, cov xim thiab kho cov txheej txheem yuav tso cov organic pov tseg roj (tso tshaj tawm pua pua ntawm volatile organic tebchaw, feem ntau yog alkane, alkanes, olefin, aromatic compounds, cawv, aldehyde, ketones, ester, ether, thiab lwm yam compounds).
2. Qhov chaw thiab cov yam ntxwv ntawm lub tsheb txheej tso pa roj
Tsheb painting Rhiav yuav tsum ua cov xim ua ntej kho, electrophoresis thiab tshuaj tsuag xim rau ntawm qhov chaw ua haujlwm. Cov txheej txheem xim muaj xws li tshuaj tsuag pleev xim, ntws thiab ziab, hauv cov txheej txheem no yuav tsim cov pa roj carbon monoxide (VOCs) thiab cov tshuaj tsuag tsuag, yog li cov txheej txheem no yuav tsum tau pleev xim rau chav khib nyiab.
(1) Cov pa khib nyiab los ntawm chav tsev pleev xim
Txhawm rau tswj hwm qhov chaw ua haujlwm ntawm kev txau, raws li cov cai ntawm Txoj Cai Kev Nyab Xeeb Kev Nyab Xeeb thiab Kev Noj Qab Haus Huv, huab cua yuav tsum tau hloov tsis tu ncua hauv chav txau, thiab huab cua hloov ceev yuav tsum tswj nyob rau hauv thaj tsam ntawm (0.25 ~ 1) m / s. Lub ntsiab muaj pes tsawg leeg ntawm cov pa tso pa roj yog cov organic hnyav ntawm cov tshuaj tsuag xim, nws lub ntsiab Cheebtsam yog aromatic hydrocarbons (peb benzene thiab non-methane tag nrho cov hydrocarbon), cawv ether, ester organic hnyav, vim hais tias lub tso zis ntim ntawm lub chav tsev yog loj heev, yog li tag nrho cov concentration ntawm cov organic pov tseg cov pa tawm yog tsawg heev, feem ntau yog hais txog 100 mg / m3. Tsis tas li ntawd, qhov tso pa tawm ntawm chav pleev xim feem ntau muaj me me ntawm cov xim tsis zoo tag nrho, tshwj xeeb tshaj yog cov xim pleev xim qhuav ntes cov tshuaj tsuag hauv chav tsev, cov xim pos huab hauv qhov tso pa tawm, tuaj yeem ua qhov cuam tshuam rau kev kho cov roj pov tseg, kev kho cov roj khib nyiab yuav tsum yog pretreatment.
(2) Cov pa khib nyiab los ntawm chav ziab khaub ncaws
Lub ntsej muag pleev xim tom qab pleev xim ua ntej ziab, xav kom ntws cua, ntub xim xim zaj duab xis organic hnyav hauv cov txheej txheem ziab kom qhuav, txhawm rau tiv thaiv huab cua sab hauv tsev organic hnyav sib sau ua ke tawg tawg, chav cua yuav tsum tsis tu ncua huab cua, hloov huab cua ceev feem ntau tswj ib ncig ntawm 0.2 m / s, tso pa tawm thiab cov xim chav tso pa tawm, tab sis tsis muaj cov xim pleev xim rau chav tsev, tag nrho cov ntsiab lus ntawm cov pa roj hauv cov pa paug. kwv yees li 2 zaug, tuaj yeem ncav cuag 300 mg / m3, feem ntau yog tov nrog cov tshuaj tsuag hauv tsev tom qab kev kho mob hauv nruab nrab. Tsis tas li ntawd, chav tsev pleev xim, cov xim pleev xim rau cov dej phwj tuaj ntawm lub pas dej yuav tsum tau tso cov pa roj carbon zoo sib xws.
(3)Dua pa gas
Qhov sib xyaw ntawm cov khib nyiab ziab ziab yog qhov nyuaj dua, ntxiv rau cov kuab tshuaj organic, ib feem ntawm plasticizer lossis resin monomer thiab lwm yam tsis hloov pauv, tab sis kuj muaj cov khoom siv thermal decomposition, cov tshuaj tiv thaiv. Electrophoretic primer thiab hnyav hom topcoat kom qhuav muaj cov pa paug tawm, tab sis nws muaj pes tsawg leeg thiab concentration sib txawv yog loj.
※Kev phom sij ntawm cov xim pleev xim tso pa tawm:
Nws paub los ntawm kev txheeb xyuas tias cov pa khib nyiab los ntawm chav tshuaj tsuag, chav ziab khaub ncaws, chav tsev sib xyaw xim thiab chav dej sab saum toj ntawm cov dej phwj tuaj yog qhov tsis tshua muaj siab thiab loj ntws, thiab cov khoom tseem ceeb ntawm cov pa phem yog cov tshuaj tsw qab hydrocarbons, cawv ethers thiab ester organic solvents. Raws li "Comprehensive Emission Standard for Air Pollution", qhov concentration ntawm cov pa khib nyiab no feem ntau nyob rau hauv qhov txwv emission. Txhawm rau tiv thaiv cov emission npaum li cas hauv tus qauv, feem ntau lub tsev lag luam tsheb tau txais cov txheej txheem ntawm high-altitude emission. Txawm hais tias txoj kev no tuaj yeem ua tau raws li cov qauv emission tam sim no, tab sis cov pa khib nyiab yog qhov tseem ceeb tsis tau kho diluted emissions, thiab tag nrho cov pa paug paug tawm los ntawm cov kab loj ntawm lub cev yuav muaj ntau txog ntau pua tons, uas ua rau muaj kev puas tsuaj loj heev rau huab cua.
Xim pos huab hauv cov kuab tshuaj organic —— benzene, toluene, xylene yog cov tshuaj lom neeg muaj zog, ua haujlwm rau huab cua hauv kev cob qhia, cov neeg ua haujlwm tom qab nqus tau pa tuaj yeem ua rau mob hnyav thiab mob ntev, feem ntau ua rau kev puas tsuaj ntawm lub hauv nruab nrab lub paj hlwb thiab hematopoietic system, lub sij hawm luv luv inhalation siab concentration (ntau tshaj 150 mg vapor) anemia, feem ntau nqus tau qis ntawm benzene vapor tuaj yeem ua rau ntuav, cov tsos mob ntawm lub paj hlwb xws li tsis meej pem.
※Kev xaiv cov khib nyiab pov tseg txoj kev kho rau cov xim pleev xim thiab txheej:
Hauv kev xaiv cov txheej txheem kho cov organic, cov hauv qab no yuav tsum tau txiav txim siab feem ntau: hom thiab concentration ntawm cov pa phem organic, cov organic tso pa kub thiab tso tawm tus nqi, cov ntsiab lus ntawm cov teeb meem, thiab cov pa phem uas yuav tsum tau ua kom tiav.
1Sthov cov xim ntawm chav tsev kub kho
Cov pa tso pa tawm ntawm chav tha xim, chav ziab khaub ncaws, chav sib xyaw xim thiab chav dej hauv chav dej sab saum toj yog chav tsev kub tso pa roj ntawm qhov tsis tshua muaj siab thiab loj txaus, thiab cov ntsiab lus tseem ceeb ntawm cov pa phem yog cov tshuaj tsw qab hydrocarbons, cawv thiab ethers thiab ester organic solvents. Raws li GB16297 "Comprehensive Emission Standard for Air Pollution", qhov concentration ntawm cov pa khib nyiab no feem ntau nyob rau hauv qhov txwv emission. Txhawm rau tiv thaiv cov emission npaum li cas hauv tus qauv, feem ntau lub tsev lag luam tsheb tau txais cov txheej txheem ntawm high-altitude emission. Txawm hais tias txoj kev no tuaj yeem ua tau raws li cov qauv siv hluav taws xob tam sim no, tab sis cov pa khib nyiab yog qhov tseem ceeb ntawm cov pa tawm tsis muaj kev kho mob, thiab tag nrho cov pa paug paug tawm los ntawm lub cev txheej txheej loj tuaj yeem muaj ntau txog ntau pua tons, uas ua rau muaj kev puas tsuaj loj heev rau cov huab cua.
Txhawm rau kom txo qis cov pa tawm ntawm cov pa paug paug, ntau txoj hauv kev kho cov pa roj tuaj yeem sib koom ua ke rau kev kho mob, tab sis tus nqi ntawm kev kho cov pa roj nrog cov cua ntim siab heev. Tam sim no, txoj kev paub txawv teb chaws ntau dua yog ua ntej kom mloog zoo (nrog rau lub log adsorption-desorption kom mloog zoo rau tag nrho cov nyiaj kwv yees li 15 zaug), txhawm rau txo qis tag nrho cov nyiaj yuav tsum tau kho, thiab tom qab ntawd siv txoj kev puas tsuaj los kho cov roj khib nyiab concentrated. Muaj cov txheej txheem zoo sib xws hauv Suav teb, thawj txoj kev siv adsorption (activated carbon los yog zeolite li adsorbent) rau qhov tsis tshua muaj siab, chav tsev kub tshuaj tsuag xim khib nyiab adsorption, nrog kub kub gas desorption, concentrated pov tseg roj siv catalytic combustion los yog regenerative thermal combustion txoj kev kho. Tsawg concentration, ib txwm kub tshuaj tsuag xim khib nyiab roj lom txoj kev kho mob yog tsim, lub domestic technology nyob rau theem tam sim no tsis paub tab, tab sis nws yog tsim nyog them sai sai rau. Yuav kom txo tau cov pej xeem muaj kuab paug ntawm cov txheej txheej pov tseg roj, peb kuj yuav tsum tau daws qhov teeb meem los ntawm qhov chaw, xws li kev siv lub tshuab electrostatic rotary khob thiab lwm yam txhais tau tias los txhim kho kev siv tus nqi ntawm cov coatings, kev txhim kho cov txheej txheem dej thiab lwm yam kev tiv thaiv ib puag ncig.
2Drying pov tseg gas kho
Qhuav pov tseg gas belongs rau qhov nruab nrab thiab siab concentration ntawm high temperature pov tseg gas, haum rau combustion txoj kev kho. Cov tshuaj tiv thaiv combustion muaj peb yam tseem ceeb: lub sij hawm, qhov kub thiab txias, cuam tshuam, uas yog, combustion ntawm 3T tej yam kev mob. Qhov ua tau zoo ntawm kev kho cov roj khib nyiab yog qhov tseem ceeb ntawm qhov txaus ntawm cov tshuaj tiv thaiv combustion thiab nyob ntawm 3T kev tswj xyuas cov tshuaj tiv thaiv combustion. RTO tuaj yeem tswj tau qhov kub thiab txias (820 ~ 900 ℃) thiab lub sijhawm nyob (1.0 ~ 1.2s), thiab xyuas kom meej tias qhov tsim nyog cuam tshuam (cua thiab organic teeb meem sib xyaw ua ke), kev kho kom zoo yog li 99%, thiab cov khoom siv hluav taws xob pov tseg yog siab, thiab kev siv hluav taws xob tsawg. Feem ntau cov chaw tsim khoom tsheb hauv Nyij Pooj thiab Tuam Tshoj feem ntau siv RTO los kho cov pa roj ntawm kev ziab (primer, nruab nrab txheej, txheej saum toj kawg nkaus ziab). Piv txwv li, Dongfeng Nissan neeg nrog caij tsheb Huadu txheej kab siv RTO centralized kev kho mob ntawm cov txheej txheem kom qhuav cov pa roj yog zoo heev, ua tau raws li cov kev cai ntawm emission. Txawm li cas los xij, vim muaj kev nqis peev ib zaug ntawm RTO cov khoom siv khib nyiab pov tseg, nws tsis yog kev lag luam rau kev kho cov roj khib nyiab nrog cov khoom siv khib nyiab me me.
Rau qhov ua tiav txheej txheej ntau lawm, thaum xav tau cov khoom siv khib nyiab ntxiv, cov txheej txheem catalytic combustion thiab regenerative thermal combustion system tuaj yeem siv. Lub catalytic combustion system muaj me me peev thiab tsawg combustion zog noj.
Feem ntau hais lus, kev siv / platinum ua ib qho catalyst tuaj yeem txo qhov kub ntawm oxidizing feem ntau cov organic khib nyiab rau txog 315 ℃. Catalytic combustion system tuaj yeem siv rau kev kho kom qhuav cov pa khib nyiab dav dav, tshwj xeeb tshaj yog tsim rau lub tshuab ziab khaub ncaws siv hluav taws xob cua sov, qhov teeb meem uas twb muaj lawm yog yuav ua li cas kom tsis txhob muaj qhov tsis ua hauj lwm ntawm catalyst lom. Los ntawm cov kev paub dhau los ntawm qee cov neeg siv, rau qhov dav dav xim pleev xim kom qhuav cov pa khib nyiab, los ntawm kev ua kom pom cov pa khib nyiab thiab lwm yam kev ntsuas, tuaj yeem xyuas kom meej tias lub neej ntawm cov catalyst yog 3 ~ 5 xyoos; electrophoretic xim kom qhuav cov pa roj yog ib qho yooj yim ua rau catalyst lom, yog li kev kho mob ntawm electrophoretic xim kom qhuav cov pa khib nyiab yuav tsum tau ceev faj siv catalytic combustion. Nyob rau hauv cov txheej txheem ntawm kev kho cov roj khib nyiab thiab kev hloov pauv ntawm Dongfeng kev lag luam tsheb lub cev txheej kab, cov roj khib nyiab ntawm electrophoretic primer ziab yog kho los ntawm RTO txoj kev, thiab cov roj khib nyiab ntawm cov xim pleev xim rau sab saum toj yog kho los ntawm catalytic combustion txoj kev, thiab siv cov nyhuv zoo.
※Txau xim txheej txheej pov tseg roj kev kho cov txheej txheem:
Txau kev lag luam pov tseg roj kev kho lub tswv yim yog tsuas yog siv rau cov tshuaj tsuag painting chav khib nyiab kho, rooj tog Hoobkas pov tseg roj kho, machinery manufacturing kev lag luam pov tseg roj kho, guardrail Hoobkas pov tseg roj kho, tsheb tsim thiab tsheb 4S khw tshuaj tsuag xim chav pov tseg gas kho. Tam sim no, muaj ntau yam kev kho mob, xws li: txoj kev condensation, txoj kev nqus, combustion method, catalytic method, adsorption method, biological method and ion method.
1. Water spray method + activated carbon adsorption thiab desorption + catalytic combustion
Siv cov tshuaj tsuag tsuag kom tshem tawm cov xim pos huab thiab cov dej soluble hauv cov khoom siv dej, tom qab lub lim qhuav, hauv cov khoom siv carbon adsorption, xws li activated carbon adsorption full, ces stripping (stripping method with steam stripping, hluav taws xob cua sov, nitrogen stripping), tom qab lub stripping gas (concentration nce ntau ntau zaus) los ntawm stripping kiv cua mus rau hauv catalytic combustion ntaus ntawv, combustion combustion.
2. Water spray + activated carbon adsorption thiab desorption + condensation rov qab txoj kev
Siv cov tshuaj tsuag ntau kom tshem tawm cov xim pos huab thiab cov dej soluble hauv cov khoom siv dej, tom qab lub lim qhuav, hauv cov khoom siv carbon adsorption, xws li cov pa roj carbon adsorption tag nrho, tom qab ntawd mus rau stripping (stripping method nrog steam stripping, hluav taws xob cua sov, nitrogen stripping), tom qab ua cov khib nyiab adsorption concentration condensation, condensate los ntawm kev sib cais rov qab ntawm cov khoom muaj txiaj ntsig zoo. Txoj kev no yog siv rau kev kho cov roj khib nyiab nrog cov concentration siab, tsis kub thiab tsis muaj cua ntim. Tab sis hom kev nqis peev no, kev siv hluav taws xob siab, tus nqi khiav lag luam, cov tshuaj tsuag cov pa roj "peb benzene" thiab lwm cov pa roj concentration feem ntau qis dua 300 mg / m3, qis concentration, loj huab cua ntim (tsheb tsim cov xim rhiav huab cua ntim feem ntau nyob rau hauv siab tshaj 100000), thiab vim hais tias lub tsheb txheej tso pa tawm cov organic hnyav muaj pes tsawg leeg, recycling hnyav hnyav siv, thiab tsis yooj yim rau kev tsim cov pa phem. txoj kev.
3. Waste gas adsorption txoj kev
Cov tshuaj tsuag xim khib nyiab kho adsorption tuaj yeem muab faib ua cov tshuaj adsorption thiab lub cev adsorption, tab sis "peb benzene" khib nyiab cov khoom siv tshuaj lom neeg tsawg, feem ntau tsis siv tshuaj nqus. Lub cev absorbing kua absorbs tsawg volatile, thiab nws absorbs lub Cheebtsam nrog ntau affinity rau cua sov, txias thiab rov qab siv rau kev ntsuam xyuas saturation absorption. Txoj kev no yog siv rau kev hloov pauv huab cua, tsis tshua muaj kub, thiab tsis tshua muaj siab. Lub installation yog complex, kev nqis peev yog loj, kev xaiv ntawm kev nqus dej yog qhov nyuaj dua, muaj ob qho kev ua qias tuaj.
4. ACtivated carbon adsorption + UV photocatalytic oxidation khoom
(1): ncaj qha los ntawm activated carbon direct adsorption ntawm cov organic gas, kom ua tiav tus nqi purification ntawm 95%, cov cuab yeej yooj yim, me me peev, yooj yim ua hauj lwm, tab sis yuav tsum tau feem ntau hloov cov activated carbon, tsis tshua muaj concentration ntawm cov pa phem, tsis muaj rov qab los.
5.Activated carbon adsorption + cov khoom siv plasma kub
Tom qab activated carbon adsorption ua ntej, tom qab uas tsis tshua muaj kub plasma cov cuab yeej ua cov khib nyiab roj, yuav kho tus qauv ntawm cov pa paug, ion txoj kev yog siv plasma Plasma (ION plasma) degradation ntawm cov organic pov tseg roj, tshem tawm stench, tua cov kab mob, kab mob, purify huab cua yog ib tug high-tech thoob ntiaj teb kev sib piv, uas yog hu ua ib tug loj 1 xyoo pua technology nyob rau hauv lub tsev thiab txawv teb chaws. Tus yuam sij rau cov thev naus laus zis yog los ntawm cov hluav taws xob hluav taws xob siab nruab nrab ntawm cov hluav taws xob hauv nruab nrab hauv daim ntawv ntawm ntau cov active ion oxygen (plasma), cov pa ua kom muaj zog, tsim txhua yam ntawm cov dawb radicals, xws li OH, HO2, O, thiab lwm yam, benzene, toluene, xylene, ammonia, alkane thiab lwm yam organic pov tseg cov tshuaj tiv thaiv degradation, thiab oxidation ntawm lub cev. zam cov pa phem thib ob. Cov thev naus laus zis muaj cov yam ntxwv ntawm kev siv hluav taws xob tsawg, qhov chaw me me, kev ua haujlwm yooj yim thiab kev saib xyuas, thiab tshwj xeeb tshaj yog haum rau kev kho mob ntawm ntau yam khoom siv roj.
Bluv luv:
Tam sim no muaj ntau hom kev kho mob nyob rau hauv kev ua lag luam, thiaj li ua tau raws li lub teb chaws thiab hauv zos cov qauv kev kho mob, feem ntau peb yuav xaiv ntau txoj kev kho mob ua ke los kho cov roj khib nyiab, xaiv raws li lawv tus kheej cov txheej txheem kev kho mob tiag tiag.
Post lub sij hawm: Dec-28-2022
