2023-12-20
Ziziphi izixhobo zokucoca igesi ye-styrene?
1.Isishwankathelo segesi yokukhupha i-styrene
I-Styrene (i-chemical formula: C8H8) yi-organic compound eyenziwe ngokutshintsha iathomu ye-hydrogen ye-ethylene nge-benzene. I-Styrene, ekwabizwa ngokuba yi-vinylbenzene, lulwelo olungenambala olucacileyo olunamafutha, olunokutsha, oluyityhefu, olunganyibilikiyo emanzini, lunyibilika kwi-ethanol, ether, luvezwe emoyeni ngokuthe ngcembe i-polymerization kunye ne-oxidation. I-Styrene lulwelo olunokutsha lwesibini olunobuninzi obuphakathi kwe-0.907, indawo yokutshisa ezenzekelayo ye-490 degrees celsius, kunye neqondo lokubila lika-146 degrees Celsius. Iipropathi ze-Styrene zizinzile, kumashishini asetyenziswa ikakhulu ekwenzeni irabha yokwenziwa, i-ion exchange resin, i-polyether resin, i-plasticizer kunye neeplastiki kunye nezinye izinto ezibalulekileyo.
1.Iingozi zegesi zokukhupha i-styrene
I-styrene iyacaphukisa kwaye iyanxilisa emehlweni kunye nephecana eliphezulu lokuphefumla. Ityhefu ebukhali enoxinzelelo oluphezulu lwe-styrene inokucaphukisa kakhulu amehlo kunye nenwebu zendlela yokuphefumula ephezulu, ekhokelela kwiintlungu zamehlo, iinyembezi, impumlo ephumayo, ukuthimla, umqala obuhlungu, ukukhohlela kunye nezinye iimpawu, kulandele intloko ebuhlungu, isiyezi, isicaphucaphu, ukugabha. kunye nokudinwa jikelele. Ukungcoliswa kwamehlo ngolwelo lwe-styrene kunokubangela ukutshisa. Ityhefu engapheliyo ye-styrene inokubangela i-neurasthenic syndrome, intloko ebuhlungu, ukudinwa, isicaphucaphu, ukuphelelwa ngumdla, isisu esibuhlungu, ukudakumba, i-amnesia, ukungcangcazela kweminwe kunye nezinye iimpawu. I-Styrene inefuthe elicasulayo kwindlela yokuphefumula, kwaye ukubonakaliswa kwexesha elide kunokubangela utshintsho oluphazamisayo lwe-pulmonary.
1. Izixhobo zokucoca igesi yenkunkuma yeStyrene
Kwizixhobo zokucoca igesi yenkunkuma ye-styrene, kukho izixhobo zokusebenzisa i-carbon adsorption, izixhobo zokucoca i-ion, izixhobo zokutsha, njl.
(1) izixhobo ze-carbon adsorption ezisebenzayo
Izixhobo ze-carbon adsorption ezisebenzayo ikakhulu kukusetyenziswa kwe-adsorbent eqinileyo enemingxuma (ikhabhoni esebenzayo, ijeli yesilica, isihluzo semolekyuli, njl.njl.) ukunyanga irhasi yenkunkuma ephilayo, ukuze izinto ezinobungozi zibhengezwe ngokupheleleyo ngamandla ekhemikhali bond okanye umxhuzulane wemolekyuli, kunye ne-adsorbed on. umphezulu we-adsorbent, ukuze ufezekise injongo yokucoca igesi yenkunkuma yezinto eziphilayo. Okwangoku, indlela ye-adsorption isetyenziswa ikakhulu kumthamo omkhulu womoya, ugxininiso oluphantsi (≤800mg/m3), akukho nto incinci, akukho viscosity, ubushushu begumbi loxinzelelo oluphantsi loxinzelelo lwegesi yokucoca inkunkuma.
Izinga lokuhlanjululwa kwekhabhoni liphezulu (i-carbon adsorption esebenzayo inokufikelela kwi-65% -70%), i-practical, i-operation elula, utyalo-mali oluphantsi. Emva kwe-adsorption saturation, kuyimfuneko ukubuyisela ikhabhoni entsha esebenzayo, kunye nokutshintshwa kwekhabhoni esebenzayo kufuneka kubize iindleko, kunye nekhabhoni esetyenzisiweyo esetyenzisiweyo endaweni kufuneka ifumane iingcali zonyango lwenkunkuma enobungozi, kwaye iindleko zokusebenza ziphezulu.
Izinga lokuhlanjululwa kwekhabhoni liphezulu (i-carbon adsorption esebenzayo inokufikelela kwi-65% -70%), i-practical, i-operation elula, utyalo-mali oluphantsi. Emva kwe-adsorption saturation, kuyimfuneko ukubuyisela ikhabhoni entsha esebenzayo, kunye nokutshintshwa kwekhabhoni esebenzayo kufuneka kubize iindleko, kunye nekhabhoni esetyenzisiweyo esetyenzisiweyo endaweni kufuneka ifumane iingcali zonyango lwenkunkuma enobungozi, kwaye iindleko zokusebenza ziphezulu.
I-adsorption ye-Physical iyenzeka ikakhulu kwinkqubo yokususa ukungcola kwi-liquid kunye ne-gas phase zeolite. Isakhiwo se-porous se-zeolite sibonelela ngomlinganiselo omkhulu wendawo ethile, ukwenzela ukuba kube lula kakhulu ukufunxa nokuqokelela ukungcola. Ngenxa yokudityaniswa kweeamolekyuli, inani elikhulu leamolekyu kudonga lwe-zeolite pore linokuvelisa amandla anamandla axhuzulayo, njengamandla kazibuthe, ukutsala ukungcola okuphakathi ukuya kwindawo yokuvula.
Ukongeza kwi-adsorption yomzimba, ukuphendulwa kweekhemikhali kuhlala kwenzeka kumphezulu we-zeolite. Umphezulu uqulethe inani elincinci lokubopha imichiza, ifom yeqela elisebenzayo le-oksijini kunye ne-hydrogen, kwaye le miphezulu iqulethe i-oxides yomhlaba okanye ii-complexes ezinokusabela ngokwekhemikhali kunye ne-adsorbed substances, ukuze zidibanise kunye nezinto ezifakwe kwi-adsorbed kwaye zidibanise ngaphakathi nangaphakathi. zeolite.
Ukukhetha okunengqiqo kunye nokusebenzayo kwe-zeolite kunokwandisa umthamo we-adsorption we-drum kunye nokugcina ukusetyenziswa kwamandla. Xa kuthelekiswa nezinye izixhobo ze-adsorption, inezi zibonelelo zilandelayo:
Ukukhetha okunamandla kwe-adsorption:
Ubungakanani obufanayo bepore, ionic adsorbent. Inokuthi ikhethwe ngokukhethiweyo ngokobukhulu kunye ne-polarity ye-molecule.
Gcina amandla e-desorption:
I-hydrophobic molecular sieve ene-Si / Al ratio ephezulu ayibhengezi iimolekyuli zamanzi emoyeni, ukunciphisa ilahleko yobushushu ebangelwa ukukhuphuka kwamanzi.
Umthamo owomeleleyo we-adsorption:
Umthamo we-adsorption mkhulu, ukusebenza kwe-adsorption yenqanaba elinye kunokufikelela kwi-90 ~ 98%, kwaye umthamo we-adsorption usenamandla kumaqondo aphezulu.
Ukumelana nokushisa okuphezulu kunye nokungatsha:
Inozinzo oluhle lwe-thermal, iqondo lobushushu le-desorption yi-180 ~ 220 ℃, kwaye ubushushu bokumelana nobushushu obusetyenziswayo bunokufikelela kwi-350 ℃. I-Desorption igqityiwe kwaye izinga lokugxila kwi-VOCs liphezulu. Imodyuli ye-zeolite inokumelana nokushisa okuphezulu kwe-700 ℃, kwaye inokuvuselelwa ngaphandle kwe-intanethi kwiqondo lokushisa eliphezulu.
(3)Izixhobo zokutsha
Izixhobo zokutsha zitshisa ngokupheleleyo iikhompawundi eziphilayo eziguquguqukayo kwiqondo lokushisa eliphezulu kunye nomoya owaneleyo wokubola kwi-CO2 kunye ne-H2O. Indlela yokutshisa ilungele zonke iintlobo zegesi yenkunkuma ephilayo kwaye inokwahlulwa ibe zizixhobo zokutsha ezithe ngqo, izixhobo zokutshisa i-thermal (RTO) kunye nezixhobo zokutshisa i-catalytic (RCO).
Irhasi yomoya yoxinaniso oluphezulu olunogxininiso lokukhutshwayo olungaphezu kwe-5000mg/m³ luphathwa ngokubanzi ngesixhobo sokutsha esithe ngqo, esitshisa igesi yokukhupha iiVOCs njengamafutha, kwaye ubushushu bokutsha bulawulwa ngokubanzi kwi-1100 ℃, kunye nonyango olusebenzayo, olunokufikelela kuma-95% -99%.
Izixhobo zokutshisa i-thermal(RTO) ilungele ukusetyenzwa kwe-concentration ye-1000-5000mg/m³ yokukhupha igesi, ukusetyenziswa kwezixhobo zokutshisa i-thermal, ukuxinwa kwee-VOCs kwigesi yokukhupha iphantsi, isidingo sokusebenzisa amanye amafutha okanye iigesi ezivuthayo, ubushushu obufunwa ngu. Isixhobo sokutshisa i-thermal singaphantsi kunokutshisa ngokuthe ngqo, malunga ne-540-820 ℃. Izixhobo zokutshisa i-thermal kunyango lwe-VOCs inkunkuma yonyango olusebenzayo luphezulu, kodwa ukuba i-VOCs igesi yenkunkuma iqulethe i-S, i-N kunye nezinye izinto, i-gas ephumayo eyenziwa emva kokutshiswa iya kukhokelela kungcoliseko lwesibini.
Ukunyangwa kwegesi yenkunkuma yezinto eziphilayo ngesixhobo sokutshisa i-thermal okanye izixhobo zokutshisa i-catalytic inezinga eliphezulu lokuhlanjululwa, kodwa utyalo-mali kunye neendleko zokusebenza ziphezulu kakhulu. Ngenxa yeendawo ezininzi zokukhupha izinto ezisasazekileyo, kunzima ukufezekisa ingqokelela ephakathi. Izixhobo ezitshisayo zifuna iiseti ezininzi kwaye zifuna unyawo olukhulu.Isixhobo sokutshisa i-thermal sifanelekile ngakumbi kwiiyure ezingama-24 zokusebenza okuqhubekayo kunye nokugxininiswa okuphezulu kunye neemeko ezizinzileyo zegesi zokucima, azifanelekanga iimeko zomgca wemveliso. Utyalo-mali kunye neendleko zokusebenza zokutsha kwe-catalytic ziphantsi kunokushisa kwe-thermal, kodwa ukusebenza kakuhle kokucoca kuphantsi. Nangona kunjalo, i-catalyst yensimbi exabisekileyo kulula ukubangela ukungaphumeleli okunetyhefu ngenxa yokungcola kwigesi yokukhupha (njenge-sulfide), kwaye iindleko zokutshintsha i-catalyst ziphezulu kakhulu. Ngelo xesha, ukulawulwa kweemeko zokukhupha igesi kungqongqo kakhulu, ngaphandle koko kuya kubangela ukuvaleka kwegumbi lokutshisa i-catalytic kwaye kubangele izingozi zokhuseleko.
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