Kev tshuaj xyuas cov pa roj tawm ntawm cov xim pleev xim

1. Kev tsim thiab cov khoom tseem ceeb ntawm cov roj pov tseg xim tsuag

Cov txheej txheem pleev xim yog siv dav hauv tshuab, tsheb, khoom siv hluav taws xob, khoom siv hauv tsev, nkoj, rooj tog thiab lwm yam lag luam.

Cov khoom siv pleev xim - xim yog tsim los ntawm cov khoom tsis hloov pauv thiab tsis hloov pauv, tsis hloov pauv suav nrog cov tshuaj zaj duab xis thiab cov tshuaj zaj duab xis pabcuam, cov neeg sawv cev dilution volatile yog siv los dilute cov xim, kom ua tiav lub hom phiaj ntawm cov xim du thiab zoo nkauj.

Cov txheej txheem tsuag xim feem ntau tsim cov xim pleev xim thiab cov pa roj pov tseg organic, xim pleev xim nyob rau hauv qhov kev ua ntawm lub siab ua rau cov khoom me me, thaum tsuag, ib feem ntawm cov xim tsis mus txog qhov chaw tsuag, diffusion nrog cov cua los tsim cov xim pleev xim; cov pa roj pov tseg organic los ntawm kev ua kom cov tshuaj yaj, cov kuab tshuaj organic tsis txuas rau qhov chaw pleev xim, cov txheej txheem pleev xim thiab kho yuav tso cov pa roj pov tseg organic (qhia tias muaj ntau pua cov organic sib xyaw ua ke, feem ntau yog alkane, alkanes, olefin, cov sib xyaw ua ke aromatic, cawv, aldehyde, ketones, ester, ether, thiab lwm yam sib xyaw).

2. Qhov chaw thiab cov yam ntxwv ntawm cov pa roj av hauv tsheb

Lub chaw ua haujlwm pleev xim rau tsheb yuav tsum ua cov xim ua ntej kho, electrophoresis thiab tsuag xim rau ntawm qhov chaw ua haujlwm. Cov txheej txheem pleev xim suav nrog kev tsuag xim, ntws thiab ziab, hauv cov txheej txheem no yuav tsim cov pa roj pov tseg organic (VOCs) thiab tsuag tsuag, yog li cov txheej txheem no yuav tsum tau tsuag xim chav kho cov pa roj pov tseg.

(1) Cov pa roj pov tseg los ntawm chav pleev xim

Yuav kom tswj tau qhov chaw ua haujlwm ntawm kev txau, raws li cov kev cai ntawm Txoj Cai Kev Nyab Xeeb thiab Kev Noj Qab Haus Huv ntawm Cov Neeg Ua Haujlwm, huab cua yuav tsum tau hloov pauv tas li hauv chav txau, thiab qhov ceev ntawm kev hloov pauv huab cua yuav tsum tau tswj hwm hauv qhov ntau ntawm (0.25 ~ 1) m / s. Cov khoom tseem ceeb ntawm cov pa tso pa tawm yog cov organic solvent ntawm cov xim tsuag, nws cov khoom tseem ceeb yog aromatic hydrocarbons (peb benzene thiab non-methane tag nrho hydrocarbon), cawv ether, ester organic solvent, vim tias qhov ntim ntawm chav txau loj heev, yog li tag nrho cov concentration ntawm cov pa tso tawm organic yog qis heev, feem ntau yog li 100 mg / m3. Tsis tas li ntawd, cov pa tawm ntawm chav pleev xim feem ntau muaj me ntsis ntawm cov xim tsis tau kho tag nrho, tshwj xeeb tshaj yog cov xim qhuav txau chav txau, cov xim tsis nyob hauv cov pa tawm, yuav ua rau muaj kev cuam tshuam rau kev kho cov roj pov tseg, kev kho cov roj pov tseg yuav tsum tau ua ntej kho.

(2) Cov pa roj pov tseg los ntawm chav ziab khaub ncaws

Tom qab txau xim ntsej muag ua ntej ziab, xav kom cua ntws, cov xim pleev xim ntub dej thaum ziab cov khoom uas muaj kuab lom, kom tiv thaiv cua hauv tsev kom tsis txhob muaj kev sib sau ua ke ntawm cov kuab lom, chav cua yuav tsum muaj cua tas mus li, feem ntau hloov qhov ceev ntawm huab cua li ntawm 0.2 m/s, cov pa tawm thiab cov pa tawm hauv chav pleev xim, tab sis tsis muaj cov pa pleev xim, tag nrho cov pa roj pov tseg organic ntau dua li chav tsuag, raws li qhov ntim ntawm cov pa tawm, feem ntau cov pa tawm hauv chav tsuag kwv yees li 2 zaug, tuaj yeem ncav cuag 300 mg/m3, feem ntau sib xyaw nrog cov pa tawm hauv chav tsuag tom qab kev kho mob hauv nruab nrab. Tsis tas li ntawd, chav pleev xim, pas dej ua luam dej ntawm cov xim saum npoo av kuj yuav tsum tso cov pa roj pov tseg organic zoo sib xws.

(3)Droj av tawm

Cov khoom sib xyaw ua ke ntawm cov roj khib nyiab ziab yog qhov nyuaj dua, ntxiv rau cov organic solvent, ib feem ntawm cov plasticizer lossis resin monomer thiab lwm yam khoom volatile, tab sis kuj muaj cov khoom thermal decomposition, cov khoom tshuaj tiv thaiv. Electrophoretic primer thiab cov kuab tshuaj topcoat ziab muaj cov pa tawm, tab sis nws cov khoom sib xyaw thiab qhov sib txawv ntawm qhov sib txawv yog loj.

※Kev phom sij ntawm cov pa roj tawm ntawm cov xim tsuag:

Los ntawm kev tshuaj xyuas, nws paub tias cov pa roj pov tseg los ntawm chav tsuag, chav ziab, chav sib tov xim thiab chav kho dej phwj tuaj ntawm lub ntsej muag yog qhov tsis tshua muaj zog thiab muaj dej ntws ntau, thiab cov khoom tseem ceeb ntawm cov pa phem yog cov pa roj carbon dioxide uas muaj ntxhiab tsw qab, cov cawv ethers thiab cov kuab tshuaj ester organic. Raws li "Tus Qauv Kev Phem Pa Tawm rau Kev Ua Phem Huab Cua", qhov concentration ntawm cov pa roj pov tseg no feem ntau nyob hauv qhov txwv kev tso pa tawm. Txhawm rau kom daws tau qhov yuav tsum tau ua ntawm cov pa tawm hauv tus qauv, feem ntau cov chaw tsim tsheb siv txoj kev tso pa tawm siab. Txawm hais tias txoj kev no tuaj yeem ua tau raws li cov qauv kev tso pa tawm tam sim no, tab sis cov pa roj pov tseg yog qhov tsis tau kho kom tsis muaj pa tawm, thiab tag nrho cov pa roj uas tso tawm los ntawm cov kab txheej loj tuaj yeem siab txog ntau pua tons, uas ua rau muaj kev puas tsuaj loj heev rau huab cua.

Xim pos huab hauv cov organic solvent —— benzene, toluene, xylene yog cov kuab tshuaj lom muaj zog, ua haujlwm rau huab cua hauv lub chaw ua haujlwm, cov neeg ua haujlwm tom qab ua pa tau tuaj yeem ua rau muaj kev lom mob hnyav thiab ntev, feem ntau ua rau puas tsuaj rau lub paj hlwb thiab hematopoietic system, luv luv ua pa siab concentration (ntau dua 1500 mg / m3) ntawm benzene vapor, tuaj yeem ua rau aplastic anemia, feem ntau ua pa qis concentration ntawm benzene vapor kuj tuaj yeem ua rau ntuav, cov tsos mob ntawm lub paj hlwb xws li kev tsis meej pem.

※Kev xaiv txoj kev kho cov roj khib nyiab rau cov xim tsuag thiab txheej:

Thaum xaiv cov txheej txheem kho cov organic, cov hauv qab no yuav tsum tau xav txog feem ntau: hom thiab qhov concentration ntawm cov organic pollutants, qhov kub thiab txias ntawm cov pa tawm organic thiab qhov ntws tawm, cov ntsiab lus ntawm cov khoom me me, thiab qib kev tswj cov pa phem uas yuav tsum tau ua tiav.

1Sthov pleev xim rau qhov kub thiab txias hauv chav tsev

Cov pa roj tawm ntawm chav pleev xim, chav ziab, chav sib tov xim thiab chav kho dej phwj tuaj yog cov pa roj tawm ntawm chav sov uas muaj qhov concentration tsawg thiab ntws ntau, thiab cov khoom xyaw tseem ceeb ntawm cov pa phem yog cov roj hydrocarbons uas muaj ntxhiab tsw qab, cawv thiab ethers thiab ester organic solvents. Raws li GB16297 "Comprehensive Emission Standard for Air Pollution", qhov concentration ntawm cov pa roj pov tseg no feem ntau nyob hauv qhov txwv tsis pub muaj pa phem. Yuav kom daws tau qhov yuav tsum tau ua ntawm cov pa phem hauv tus qauv, feem ntau cov chaw tsim tsheb siv txoj kev tso pa phem siab. Txawm hais tias txoj kev no tuaj yeem ua tau raws li cov qauv tso pa phem tam sim no, tab sis cov pa phem yog cov pa phem uas tsis tau kho, thiab tag nrho cov pa phem uas tso tawm los ntawm cov kab txheej loj tuaj yeem siab txog ntau pua tons, uas ua rau muaj kev puas tsuaj loj heev rau huab cua.

Yuav kom txo tau qhov tso pa tawm ntawm cov pa phem, ntau txoj kev kho cov pa phem siv tau ua ke los kho, tab sis tus nqi kho cov pa phem nrog cov pa ntau heev yog siab heev. Tam sim no, txoj kev txawv teb chaws uas laus dua yog ua ntej concentrate (nrog lub log adsorption-desorption kom concentrate tag nrho li ntawm 15 zaug), kom txo tag nrho cov nyiaj uas yuav tsum tau kho, thiab tom qab ntawd siv txoj kev rhuav tshem los kho cov pa phem uas muaj concentrated. Muaj cov txheej txheem zoo sib xws hauv Suav teb, thawj zaug siv txoj kev adsorption (activated carbon lossis zeolite ua adsorbent) rau qhov concentration qis, chav tsev kub kub spray xim pov tseg roj adsorption, nrog kub siab desorption, concentrated pov tseg roj siv catalytic combustion lossis regenerative thermal combustion txoj kev kho. Qhov concentration qis, qhov kub ib txwm muaj tshuaj lom neeg kho cov pa phem, cov thev naus laus zis hauv tsev tam sim no tseem tsis tau laus, tab sis nws tsim nyog them sai sai rau. Yuav kom txo tau qhov teeb meem ntawm cov pa roj pov tseg rau pej xeem, peb kuj yuav tsum daws qhov teeb meem los ntawm qhov chaw, xws li kev siv cov khob electrostatic rotary thiab lwm txoj hauv kev los txhim kho kev siv cov txheej txheem, kev tsim cov txheej txheem dej thiab lwm yam txheej txheem tiv thaiv ib puag ncig.

2Dkev kho cov pa roj khib nyiab

Kev ziab cov roj pov tseg yog cov roj pov tseg kub nruab nrab thiab siab, tsim nyog rau kev kho mob combustion. Cov tshuaj tiv thaiv combustion muaj peb qhov tseem ceeb: lub sijhawm, kub, kev cuam tshuam, uas yog, kev hlawv ntawm 3T tej yam kev mob. Kev ua haujlwm ntawm kev kho cov roj pov tseg yog qhov txaus ntawm cov tshuaj tiv thaiv combustion thiab nyob ntawm 3T tej yam kev mob tswj hwm ntawm cov tshuaj tiv thaiv combustion. RTO tuaj yeem tswj tau qhov kub combustion (820 ~ 900 ℃) thiab lub sijhawm nyob (1.0 ~ 1.2s), thiab xyuas kom meej tias muaj kev cuam tshuam tsim nyog (cua thiab cov organic sib xyaw ua ke), kev ua haujlwm kho tau zoo txog li 99%, thiab tus nqi cua sov pov tseg siab, thiab kev siv zog ua haujlwm tsawg. Feem ntau cov chaw tsim khoom tsheb Nyiv hauv Nyiv thiab Tuam Tshoj feem ntau siv RTO los kho cov pa roj tawm ntawm kev ziab (primer, txheej nruab nrab, ziab txheej sab saum toj). Piv txwv li, Dongfeng Nissan tsheb neeg caij tsheb Huadu txheej kab siv RTO kev kho mob centralized ntawm txheej ziab cov pa roj tawm cov nyhuv zoo heev, ua tau raws li cov kev cai ntawm cov cai tso pa tawm. Txawm li cas los xij, vim yog kev nqis peev ib zaug ntawm RTO cov khoom siv kho roj pov tseg, nws tsis pheej yig rau kev kho roj pov tseg nrog cov roj pov tseg me me.

Rau cov kab ntau lawm txheej txheem tiav lawm, thaum xav tau cov khoom siv kho cov roj pov tseg ntxiv, lub kaw lus catalytic combustion thiab lub kaw lus regenerative thermal combustion tuaj yeem siv tau. Lub kaw lus catalytic combustion muaj kev nqis peev me me thiab kev siv hluav taws xob tsawg.

Feem ntau hais lus, kev siv / platinum ua tus catalyst tuaj yeem txo qhov kub ntawm oxidizing feem ntau cov organic pov tseg roj mus txog li 315 ℃. Catalytic combustion system tuaj yeem siv rau kev kho cov roj pov tseg dav dav, tshwj xeeb tshaj yog haum rau kev siv hluav taws xob ziab siv hluav taws xob cua sov, qhov teeb meem uas twb muaj lawm yog yuav ua li cas kom tsis txhob muaj kev lom catalyst. Los ntawm kev paub ntawm qee tus neeg siv, rau cov xim pleev xim dav dav, los ntawm kev nce cov roj pov tseg lim thiab lwm yam kev ntsuas, tuaj yeem ua kom lub neej ntawm catalyst yog 3 ~ 5 xyoos; electrophoretic xim ziab cov roj pov tseg yooj yim ua rau muaj kev lom catalyst, yog li kev kho cov xim electrophoretic ziab cov roj pov tseg yuav tsum ceev faj siv catalytic combustion. Hauv cov txheej txheem ntawm kev kho cov roj pov tseg thiab kev hloov pauv ntawm Dongfeng lub cev tsheb txheej kab, cov roj pov tseg ntawm electrophoretic primer ziab yog kho los ntawm RTO txoj kev, thiab cov roj pov tseg ntawm cov xim pleev xim sab saud yog kho los ntawm catalytic combustion txoj kev, thiab cov txiaj ntsig siv zoo.

※Cov txheej txheem kho cov pa roj pov tseg:

Cov txheej txheem kho cov roj pov tseg hauv kev lag luam txau feem ntau yog siv rau kev kho cov roj pov tseg hauv chav pleev xim, kev kho cov roj pov tseg hauv Hoobkas rooj tog, kev kho cov roj pov tseg hauv kev lag luam tsim khoom siv tshuab, kev kho cov roj pov tseg hauv Hoobkas guardrail, kev tsim tsheb thiab kev kho cov roj pov tseg hauv chav pleev xim tsheb 4S. Tam sim no, muaj ntau yam txheej txheem kho, xws li: txoj kev condensation, txoj kev nqus, txoj kev combustion, txoj kev catalytic, txoj kev adsorption, txoj kev biological thiab txoj kev ion.

1. WTxoj kev tsuag dej + kev nqus thiab tshem tawm cov pa roj carbon ua kom muaj zog + kev sib xyaw ua ke catalytic

Siv lub tshuab tsuag kom tshem tawm cov xim pleev xim thiab cov dej uas yaj tau hauv dej, tom qab lim dej qhuav, hauv lub cuab yeej nqus pa roj carbon uas ua kom muaj zog, xws li cov pa roj carbon uas ua kom muaj zog nqus tag nrho, tom qab ntawd rho tawm (txoj kev rho tawm nrog kev rho tawm pa, cua sov hluav taws xob, rho tawm nitrogen), tom qab rho tawm cov roj (kev sib xyaw ua ke ntau zaus) los ntawm kev rho tawm kiv cua mus rau hauv lub cuab yeej hlawv catalytic, hlawv mus rau hauv cov pa roj carbon dioxide thiab dej, tom qab tso tawm.

2. WTshuaj tsuag dej + cov pa roj carbon uas ua kom muaj zog adsorption thiab desorption + txoj kev rov qab ua kom cov dej noo

Siv lub tshuab tsuag kom tshem tawm cov xim pleev xim thiab cov dej uas yaj tau, tom qab lim qhuav, siv cov khoom siv adsorption carbon activated, xws li cov pa roj carbon activated adsorption tag nrho, tom qab ntawd mus rau stripping (txoj kev stripping nrog cov pa dej stripping, hluav taws xob cua sov, nitrogen stripping), tom qab ua tiav cov pa roj pov tseg adsorption concentration condensate, condensate los ntawm kev sib cais rov qab cov organic teeb meem muaj nqis. Txoj kev no yog siv rau kev kho cov pa roj pov tseg nrog cov concentration siab, kub qis thiab cua tsawg. Tab sis txoj kev no kev nqis peev, kev siv hluav taws xob ntau, tus nqi ua haujlwm, cov pa roj tso tawm ntawm cov xim tsuag "peb benzene" thiab lwm cov pa roj tso tawm feem ntau qis dua 300 mg / m3, concentration qis, cua loj (cov pa roj ntawm cov chaw tsim khoom xim tsheb feem ntau yog siab dua 100000), thiab vim tias cov pa roj tso tawm ntawm cov tshuaj organic coatings hauv tsheb, cov tshuaj rov ua dua tshiab nyuaj rau siv, thiab yooj yim tsim cov pa phem thib ob, yog li cov txheej txheem hauv kev kho cov pa roj pov tseg feem ntau tsis siv txoj kev no.

3. WTxoj kev nqus roj aste

Kev siv tshuaj tsuag xim pov tseg cov pa roj adsorption tuaj yeem muab faib ua cov tshuaj adsorption thiab lub cev adsorption, tab sis "peb benzene" cov pa roj pov tseg cov tshuaj lom neeg ua haujlwm tsawg, feem ntau tsis siv cov tshuaj nqus. Cov kua dej nqus lub cev nqus cov volatile tsawg dua, thiab nws nqus cov khoom nrog kev sib raug zoo dua rau cua sov, txias thiab rov siv dua rau kev soj ntsuam kev nqus dej. Txoj kev no yog siv rau kev hloov pauv huab cua, qhov kub qis, thiab qhov concentration qis. Kev teeb tsa yog qhov nyuaj, kev nqis peev yog loj, kev xaiv cov kua dej nqus yog qhov nyuaj dua, muaj ob qho kev ua qias tuaj.

4. IbCov pa roj carbon adsorption + UV photocatalytic oxidation khoom siv

(1): ncaj qha los ntawm cov pa roj carbon activated ncaj qha adsorption ntawm cov roj organic, kom ua tiav qhov kev ntxuav ntawm 95%, cov khoom siv yooj yim, kev nqis peev me me, kev ua haujlwm yooj yim, tab sis yuav tsum tau hloov cov pa roj carbon activated feem ntau, qhov concentration tsawg ntawm cov pa phem, tsis muaj kev rov qab los. (2) Txoj kev adsorption: cov roj organic hauv cov pa roj carbon activated adsorption, cov pa roj carbon activated saturated thiab rov ua dua tshiab.

5.IbCov pa roj carbon adsorption + cov khoom siv plasma kub qis

Tom qab ua kom cov pa roj carbon ua haujlwm ua ntej, tom qab ntawd siv cov khoom siv plasma kub qis ua cov roj pov tseg, yuav kho cov qauv ntawm cov roj tawm, txoj kev ion yog siv plasma Plasma (ION plasma) degradation ntawm cov roj pov tseg organic, tshem tawm cov ntxhiab tsw phem, tua cov kab mob, cov kab mob, ntxuav huab cua yog kev sib piv thoob ntiaj teb high-tech, cov kws tshaj lij hauv tsev thiab txawv teb chaws hu ua ib qho ntawm plaub lub thev naus laus zis tseem ceeb hauv xyoo pua 21st. Qhov tseem ceeb rau cov thev naus laus zis yog los ntawm kev tso tawm high voltage pulse medium block hauv daim ntawv ntawm ntau tus neeg ua haujlwm ion oxygen (plasma), cov roj 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 roj pov tseg organic, oxidation thiab lwm yam kev ua haujlwm lub cev thiab tshuaj lom neeg, thiab cov khoom tsis muaj tshuaj lom, zam kev ua qias tuaj theem ob. Cov thev naus laus zis muaj cov yam ntxwv ntawm kev siv hluav taws xob tsawg heev, qhov chaw me me, kev ua haujlwm yooj yim thiab kev saib xyuas, thiab tshwj xeeb tshaj yog tsim rau kev kho ntau yam roj sib xyaw.

Bkev piav qhia luv luv:

Tam sim no muaj ntau hom kev kho mob hauv khw, txhawm rau kom ua tau raws li cov qauv kev kho mob hauv tebchaws thiab hauv zos, peb feem ntau yuav xaiv ntau txoj kev kho mob ua ke los kho cov roj pov tseg, xaiv raws li lawv cov txheej txheem kho mob tiag tiag rau kev kho mob.