Qhov tshiab tshaj tawm gb31570-2015 "emission standard for pollutants in petroleum refining industry" xav kom emission limit of NOx Less than or equal to 150mg/ nm3@3.5%o2 in the process heating furnace of available oil refining and chemical enterprises. (tom qab no hu ua refining thiab tshuaj ua lag luam) yuav tsum tau siv txij lub Xya Hli 1, 2017.
Nyob rau hauv cov txheej txheem refinery uas twb muaj lawm siv cov tsoos cua sov rauv burner tseem tsis tau tiav NOx emissions ntawm 150 mg / Nm3 @ 3.5% los yog tsawg O2, emissions ntawm khib nyiab roj cua sov rauv feem ntau yog los ntawm cov nplaim taws nyob rau hauv lub burner combustion los tsim nitrogen oxides, combustible. cov pa roj yog tsim los ntawm cov phom tua hluav taws kom tsis tu ncua tom qab lub teeb hluav taws kub hnyiab, yog li ntawd, cov roj combustible tuaj yeem ua tiav tag nrho cov combustion yog qhov ua ntej los txiav txim siab seb cov qauv emissions, thiab cov cua ntawm cov roj combustible tuaj yeem hlawv tag nrho thiab cov combustion chamber thiab cov combustion chamber. Flow field yog ze ze rau cov pa combustion phom tsuas yog ib lub nozzle, qhov chaw khiav ntawm lub combustion chamber yog heev nyuaj rau tsim ruaj khov. Yog li ntawd, nws yog tsim nyog los txhim kho cov roj phom qauv ntawm burner.
Kev siv cov ntsiab lus:
Raws li qhov no, lub tuam txhab muab qhov chaw nruab nrab-ignition low-nitrogen emission fuel gun rau lub burner ntawm cov txheej txheem cua sov rauv. Cov phom roj tuaj yeem ua tau raws li qhov yuav tsum tau muaj ntawm kev hloov pauv nitrogen tsawg ntawm lub tshuab hluav taws xob ntawm cov txheej txheem cua sov rauv ntawm lub chaw ua haujlwm refinery. Tom qab ua haujlwm, lub tshuab hluav taws xob tuaj yeem ua tau raws li qhov yuav tsum tau ua ntawm NOx Tsawg dua lossis sib npaug ntawm 150mg / nm3@3.5%o2.Cov phom roj muaj lub teeb ntev thiab ib pawg phom uas tau muab faib rau hauv ib ncig ntawm qhov chaw ntawm qhov ntev. Lub teeb; Phom yog sab saum toj ntawm cov kab noj hniav ntawm lub taub hau pob, pob taub hau tshuaj tsuag muaj peb lub qhov, peb lub qhov txau ntawm lub pob taub hau cov ntsiab lus ntawm lub nkhaus, nyob rau hauv nruab nrab ntawm lub nozzle nyob rau sab saum toj ntawm lub pob taub hau tom qab lub roj tshuaj tsuag los ntawm nruab nrab qhov dav hlau kev taw qhia yog zoo ib yam nrog rau qhov chaw ntawm rab phom axis, roj los ntawm qhov seem ob yog tilted divergent nozzle dav hlau, ib tug dav hlau kev taw qhia mus rau lub pilot burner, lwm yam dav hlau kev taw qhia puas-hluav taws teeb rau deviate ntawm cov kev taw qhia.
Tsis tas li ntawd, qhov suav nrog lub kaum sab xis ntawm lub hauv paus nruab nrab ntawm lub nruab nrab lub taub hau thiab lub hauv paus axis ntawm rab phom yog 4 ~ 6 degree, nrog lub kaum sab xis ntawm lub hauv paus axis ntawm lub nozzle tig rau lub teeb thiab lub hauv paus axis ntawm rab phom yog 12 ~ 18 degree , thiab qhov suav nrog lub kaum sab xis ntawm lub hauv paus axis ntawm lub nozzle deviating los ntawm cov kev taw qhia ntawm lub teeb thiab lub hauv paus axis ntawm rab phom yog 22 ~ 28 degree .Lub phom thiab lub teeb yog mounted thiab tsau ua ke los ntawm lub hauv paus.
Cov txiaj ntsig muaj txiaj ntsig: cov roj phom puas yuav tau teeb tsa hauv nruab nrab ntawm qhov zoo, rab phom siv coj, ntsug nce thiab sab nraud ntawm peb hom kev txhaj tshuaj peb thaj tsam, hauv thaj tsam ntawm cov tshuaj tiv thaiv combustion ntawm roj sib tw txhua. Lwm yam, tsis tuaj yeem lav qhov ruaj khov ntawm kev sib txuas, thiab tuaj yeem lav tau qee qhov kev faib ua feem ntawm cov pa roj ntws, cov roj combustion tuaj yeem ua tiav thiab tag nrho, cov khoom siv hluav taws xob ntawm nitrogen oxides txo qis dua piv rau cov phom combustion, txhawb lub burner ntawm nox emission txo. .
Roj yog ejected los ntawm qhov seem ob lub dav hlau nyob rau hauv ib tug slanted thiab divergent kev taw qhia, ib tug mus rau lub teeb thiab lwm yam deb ntawm lub teeb.Jet axis kev taw qhia mus rau lub puas-kub teeb ntawm qhov chaw ntawm lub nozzle thiab qhov chaw ntawm rab phom axis lub kaum sab xis. yog 15 degree thiab roj los ntawm lub dav hlau nozzle tom qab muaj cov nyhuv ntawm cov nplaim taws ruaj khov, dav hlau kev taw qhia deviating los ntawm cov kev taw qhia ntawm tus tsav burner nozzle qhov ntawm qhov chaw ntawm lub axis thiab lub kaum sab xis ntawm qhov chaw ntawm ib rab phom yog 25 degree, tom qab lub roj los ntawm lub nozzle dav hlau roj rau grading.
Lub hauv paus ntsiab lus ua haujlwm: thaj chaw tshuaj tiv thaiv tsim los ntawm lub dav hlau orienting mus rau lub nozzle ntawm lub teeb ua lub luag haujlwm ntawm cov nplaim taws ruaj khov: qhov feem ntawm cov roj tseem ceeb hauv cov roj tag nrho yog me me, thiab lub dav hlau lub zog qis. Tom qab qhov qis-momentum thawj roj converges rau hauv qhov chaw, lub zos stagnation reflux cheeb tsam yuav raug generated, thiab cov stagnation reflux cheeb tsam ua si lub luag hauj lwm ntawm nplaim taws stabilization.
Cov tshuaj tiv thaiv cheeb tsam tsim los ntawm lub dav hlau qhov deviating los ntawm cov kev taw qhia ntawm lub teeb ntev plays lub luag hauj lwm ntawm kev faib cov roj: cov roj theem nrab account rau txog 30% ntawm tag nrho cov roj, thiab 30% ntawm cov roj theem nrab thiab cov huab cua cov tshuaj tiv thaiv yuav tsim cov qis- Qhov kub thiab txias ntawm cov roj ntshiv, uas yuav inhibit NOx tsim ntawm qhov kub thiab txias. Ntawm qhov tod tes, 30% ntawm cov roj theem nrab thiab huab cua cov tshuaj tiv thaiv yuav tsim cov pa oxygen tsis zoo, uas nkag mus rau hauv qab dej thiab dhau los ua oxidant hauv thaj tsam backflow ntawm ua gas. Cov oxidant no muaj qhov kub thiab txias tuaj yeem ncaj qha hluav taws kub rau peb zaug.Formed nyob rau hauv nruab nrab ntawm lub nozzle plays lub luag hauj lwm ntawm flue gas ntawm reflux tshuaj tiv thaiv cheeb tsam: peb roj tso nyiaj rau ntau tshaj li ib nrab ntawm tag nrho cov roj, dav hlau momentum, siab. Kev txhaj tshuaj ceev, kev kub ceev ntawm peb zaug ntawm cov roj dav hlau induced los ntawm kub flue roj rov qab mus rau peb zaug ntawm cov tshuaj tiv thaiv cheeb tsam, thiab txhawb lub backflow ntawm flue roj thiab roj, peb zaug thib ob cov tshuaj tiv thaiv cheeb tsam oxygen-depleted gas ceev sib tov, reflux flue gas sib tov yuav diluted reactants rau cov tshuaj tiv thaiv hypoxic, tsis tshua muaj oxygen inhibition ntawm NOx tsim.
Raws li qhov tshwm sim, cov saum toj no tsuas yog cov piv txwv zoo dua, tsis yog qhov kev tiv thaiv.
