Dab tsi yog cov khoom siv styrene khib nyiab kho?

Dab tsi yog cov khoom siv styrene khib nyiab kho？

1.Txheej txheem cej luam ntawm styrene tso pa roj

Styrene (cov tshuaj formula: C8H8) yog cov organic compound tsim los ntawm kev hloov ib hydrogen atom ntawm ethylene nrog benzene. Styrene, tseem hu ua vinylbenzene, yog cov xim tsis muaj pob tshab oily kua, flammable, tshuaj lom, insoluble hauv dej, soluble hauv ethanol, ether, raug rau huab cua maj mam polymerization thiab oxidation. Styrene yog cov kua hluav taws xob thib ob nrog qhov sib txheeb ze ntawm 0.907, qhov taw tes sib kis ntawm 490 degrees Celsius, thiab qhov kub ntawm 146 degrees Celsius. Styrene cov khoom yog qhov ruaj khov, kev lag luam feem ntau yog siv rau hauv kev tsim cov roj hmab hluavtaws, ion pauv resin, polyether resin, plasticizer thiab plastics thiab lwm yam tseem ceeb monomer.

1.Styrene tso pa roj txaus ntshai

Styrene yog irritating thiab intoxicant rau lub qhov muag thiab ua pa sab sauv. Cov tshuaj lom neeg mob hnyav nrog cov tshuaj styrene siab tuaj yeem ua rau lub qhov muag thiab cov mucous daim nyias nyias ntawm qhov ua pa sab sauv, ua rau mob qhov muag, kua muag, qhov ntswg, txham, mob caj pas, hnoos thiab lwm yam tsos mob, tom qab ntawd mob taub hau, kiv taub hau, xeev siab, ntuav. thiab kev qaug zog. Qhov muag kis nrog cov kua styrene tuaj yeem ua rau kub hnyiab. Cov tshuaj lom neeg mob ntev ntawm styrene tuaj yeem ua rau neurasthenic syndrome, mob taub hau, qaug zog, xeev siab, tsis qab los noj mov, mob plab, kev nyuaj siab, amnesia, ntiv tes tshee thiab lwm yam tsos mob. Styrene muaj kev cuam tshuam rau kev ua pa ntawm txoj hlab ntsws, thiab kev raug mob mus ntev tuaj yeem ua rau muaj kev hloov pauv hauv lub ntsws.

1. Styrene pov tseg cov khoom siv kho mob

Rau cov khoom siv styrene khib nyiab kho, feem ntau yog cov khoom siv carbon adsorption, ion purification khoom, combustion khoom, thiab lwm yam.

(1) activated carbon adsorption khoom

Cov khoom siv ua kom cov pa roj carbon adsorption feem ntau yog siv cov khoom ntxeem tau cov khoom adsorbent (cov pa roj carbon activated, silica gel, molecular sieve, thiab lwm yam) los kho cov pa roj carbon monoxide, kom cov khoom tsis zoo tuaj yeem nqus tau los ntawm kev siv tshuaj lom neeg los yog lub zog molecular, thiab adsorbed ntawm qhov saum npoo ntawm cov adsorbent, thiaj li ua tiav lub hom phiaj ntawm purifying organic pov tseg roj. Tam sim no, txoj kev adsorption feem ntau yog siv hauv cov huab cua loj, tsis tshua muaj siab (≤800mg / m3), tsis muaj teeb meem, tsis muaj viscosity, chav tsev kub tsis tshua muaj concentration organic pov tseg roj purification kho.

Activated carbon purification tus nqi siab (activated carbon adsorption tuaj yeem ncav cuag 65% -70%), siv tau, ua haujlwm yooj yim, peev nyiaj tsawg. Tom qab adsorption saturation, nws yog ib qho tsim nyog los hloov cov pa roj carbon activated tshiab, thiab kev hloov cov pa roj carbon activated yuav tsum tau them nqi, thiab hloov cov pa roj carbon saturated activated carbon kuj yuav tsum nrhiav cov kws tshaj lij rau kev kho cov khib nyiab pov tseg, thiab cov nqi ua haujlwm siab.

Activated carbon purification tus nqi siab (activated carbon adsorption tuaj yeem ncav cuag 65% -70%), siv tau, ua haujlwm yooj yim, peev nyiaj tsawg. Tom qab adsorption saturation, nws yog ib qho tsim nyog los hloov cov pa roj carbon activated tshiab, thiab kev hloov cov pa roj carbon activated yuav tsum tau them nqi, thiab hloov cov pa roj carbon saturated activated carbon kuj yuav tsum nrhiav cov kws tshaj lij rau kev kho cov khib nyiab pov tseg, thiab cov nqi ua haujlwm siab.

Lub cev adsorption feem ntau tshwm sim hauv cov txheej txheem ntawm kev tshem tawm impurities hauv cov kua thiab roj theem ntawm zeolite. Cov qauv ntxeem tau ntawm zeolite muab ntau qhov chaw ntawm qhov chaw tshwj xeeb, yog li nws yooj yim heev rau nqus thiab sau impurities. Vim yog qhov sib txuam adsorption ntawm molecules, ntau cov molecules ntawm zeolite pore phab ntsa tuaj yeem tsim lub zog gravitational, ib yam li lub zog sib nqus, thiaj li nyiam cov impurities hauv nruab nrab mus rau qhov aperture.

Ntxiv nrog rau lub cev adsorption, tshuaj lom neeg cov tshuaj tiv thaiv feem ntau tshwm sim ntawm zeolite nto. Qhov saum npoo muaj ib qho me me ntawm cov tshuaj binding, pab pawg ua haujlwm ntawm cov pa oxygen thiab hydrogen, thiab cov chaw no muaj cov oxides hauv av los yog cov complexes uas muaj peev xwm chemically hnov ​​​​mob nrog cov adsorbed tshuaj, thiaj li ua ke nrog cov tshuaj adsorbed thiab sib sau ua ke rau sab hauv thiab saum npoo. ntawm zeolite.

Tsim nyog thiab ua tau zoo xaiv zeolite tuaj yeem ua kom muaj peev xwm adsorption ntawm lub nruas thiab txuag lub zog noj. Piv nrog rau lwm cov ntaub ntawv adsorption, nws muaj qhov zoo hauv qab no:

Muaj zog adsorption selectivity：

Uniform pore loj, ionic adsorbent. Nws tuaj yeem raug xaiv adsorbed raws li qhov loj thiab polarity ntawm cov molecule.

Txuag lub zog desorption：

Lub hydrophobic molecular sieve nrog siab Si / Al piv tsis adsorb dej molecules nyob rau hauv cov huab cua, txo cov cua kub los ntawm dej evaporation.

Muaj zog adsorption muaj peev xwm：

Lub peev xwm adsorption yog loj, ib-theem adsorption efficiency tuaj yeem ncav cuag 90 ~ 98%, thiab lub peev xwm adsorption tseem muaj zog ntawm qhov kub siab dua.

Kub kub tsis kam thiab tsis-flammable：

Nws muaj qhov zoo thermal stability, qhov kub desorption yog 180 ~ 220 ℃, thiab cov cua sov ua haujlwm kub hauv kev siv tuaj yeem ncav cuag 350 ℃. Desorption tiav thiab VOCs concentration tus nqi siab. Lub zeolite module tuaj yeem tiv taus qhov kub siab tshaj ntawm 700 ℃, thiab tuaj yeem rov tsim dua offline ntawm qhov kub siab.

(3)Cov khoom siv combustion

Cov khoom siv combustion tag nrho hlawv cov volatile organic tebchaw ntawm qhov kub thiab txias txaus kom decompose rau hauv CO2 thiab H2O. Cov txheej txheem combustion yog tsim rau txhua yam ntawm cov organic pov tseg thiab tuaj yeem muab faib ua cov khoom siv hluav taws xob ncaj qha, cov khoom siv thermal combustion (RTO) thiab cov khoom siv catalytic combustion (RCO).

High-concentration tso pa roj nrog emission concentration ntau dua 5000mg / m³ feem ntau yog kho los ntawm cov khoom siv hluav taws xob ncaj qha, uas hlawv VOCs tso pa roj ua roj, thiab qhov kub thiab txias feem ntau tswj tau ntawm 1100 ℃, nrog kev kho mob siab, uas tuaj yeem ncav cuag 95%. -99%.

Thermal combustion khoom(RTO) yog tsim rau kev ua cov concentration ntawm 1000-5000mg / m³ tso pa roj, siv cov khoom siv thermal combustion, cov concentration ntawm VOCs nyob rau hauv cov pa tso pa yog tsawg, yuav tsum tau siv lwm yam fuels los yog combustion gases, qhov kub thiab txias yuav tsum tau. Cov khoom siv thermal combustion yog qis dua li kev sib txuas ncaj qha, txog 540-820 ℃. Cov khoom siv hluav taws xob combustion rau kev kho mob ntawm VOCs khib nyiab roj kev kho mob siab, tab sis yog tias VOCs khib nyiab roj muaj S, N thiab lwm yam khoom, cov pa paug tawm tom qab combustion yuav ua rau cov pa phem thib ob.

Kev kho cov pa roj carbon monoxide los ntawm cov khoom siv thermal combustion lossis cov khoom siv catalytic combustion muaj qhov ua kom huv huv, tab sis nws cov peev txheej thiab cov nqi khiav lag luam yog siab heev. Vim muaj ntau thiab tawg ntho cov ntsiab lus emissions, nws yog ib qho nyuaj rau ua tiav centralized sau. Cov cuab yeej siv hluav taws xob xav tau ntau yam teeb tsa thiab xav tau lub hneev taw loj.Cov khoom siv hluav taws xob sib xyaw ua kom zoo dua rau 24 teev ua haujlwm tas mus li thiab siab concentration thiab ruaj khov tso pa roj, tsis haum rau cov kab ntau lawm. Kev nqis peev thiab kev khiav hauj lwm tus nqi ntawm catalytic combustion yog qis dua li ntawm thermal combustion, tab sis qhov kev ua kom huv si kuj qis dua. Txawm li cas los xij, cov khoom siv hlau muaj txiaj ntsig yog ib qho yooj yim los ua kom tsis muaj tshuaj lom vim yog impurities hauv cov pa roj (xws li sulfide), thiab tus nqi ntawm kev hloov cov catalyst yog siab heev. Nyob rau tib lub sijhawm, kev tswj hwm ntawm cov pa tso pa tawm yog nruj heev, txwv tsis pub nws yuav ua rau muaj kev cuam tshuam ntawm catalytic combustion chamber thiab ua rau muaj kev nyab xeeb.

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