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Ukwelashwa kwe-Denitration kwesikhungo sikagesi

Ukwelashwa kwe-Denitration kwesikhungo sikagesi

Denitration treatment of power plant Featured Image
  • Denitration treatment of power plant
  • Denitration treatment of power plant

Incazelo emfushane:

I-Selective catalytic reduction (SCR) isetshenziselwa ukulawula i-NOx ekukhishweni kwenjini yedizili.I-NH3 noma i-urea (imvamisa isixazululo se-urea esinamanzi esinesilinganiso esikhulu esingu-32.5%) sisetshenziswa njengento enciphisayo.Ngaphansi kwesimo sokuthi ukuhlushwa kwe-O2 kungaphezu kwama-oda amabili obukhulu obuphezulu kunokugxila kwe-NOx, ngaphansi kwesenzo sokushisa okuthile kanye ne-catalyst, i-NH3 isetshenziselwa ukunciphisa i-NOx ku-N2 ne-H2O.Ngoba i-NH3 inciphisa ngokukhetha i-NOx ngaphandle kokusabela nge-O2 kuqala, Ngakho-ke, ibizwa ngokuthi "ukunciphisa okukhethiwe kwe-catalytic".


Imininingwane Yomkhiqizo

Omaka bomkhiqizo

Ukukhiqizwa kwegesi ye-Landfill kubhekise ekuphehleni kukagesi ngenani elikhulu le-biogas (i-LFG landfill gas) ekhiqizwa ukuvutshelwa kwe-anaerobic kwe-organic matter endaweni yokulahla imfucumfucu, okungagcini nje ngokunciphisa ukungcoliswa komoya okubangelwa ukushiswa kwemfucuza, kodwa futhi kusebenzisa izinsiza ngempumelelo.

Isingeniso sobuchwepheshe

Isizinda samandla kagesi isikhungo samandla (isikhungo samandla enuzi, isizinda samandla omoya, isikhungo samandla elanga, njll.) esiguqula uhlobo oluthile lwamandla aluhlaza (njengamanzi, isitimu, udizili, igesi) lube amandla kagesi ezinsizeni ezigxilile noma ezokuthutha.

Denitration treatment of power plant2

Ukuvikelwa kwemvelo kwe-Grvnes kusungule isethi ye-"grvnes" SCR denitration system yokwelapha ama-nitrogen oxide ekuphehleni kwamandla egesi yokulahla udoti ngemva kweminyaka yocwaningo olunzima.

Indlela

I-flue gas denitration ibhekisela ekwehliseni i-NOx ekhiqiziwe iye ku-N2 ukuze kukhishwe i-NOx kugesi ophumayo.Ngokwenqubo yokwelapha, ingahlukaniswa ibe ukuphika okumanzi kanye nokuphika okomile.Abanye abacwaningi ekhaya nakwamanye amazwe baye basungula indlela yokwelapha i-NOx waste gas ngama-microorganisms.

Denitration treatment of power plant1

Njengoba ngaphezu kwe-90% ye-NOx kugesi we-flue okhishwe ohlelweni lomlilo akukho, futhi akukho okunzima ukuncibilika emanzini, ukwelashwa okumanzi kwe-NOx akukwazi ukwenziwa ngendlela elula yokugeza.Umgomo wokuhlukaniswa kwegesi ephuma ku-flue uwukufaka i-cha ku-NO2 nge-oxidant, futhi i-NO2 ekhiqiziwe imuncwa amanzi noma isixazululo se-alkaline, ukuze kubonakale ukuchazwa.Indlela yokumunca i-O3 i-oxidation ikhipha u-cha ku-NO2 nge-O3, bese iyimunca ngamanzi.Uketshezi lwe-HNO3 olukhiqizwa yile ndlela ludinga ukugxiliswa, futhi i-O3 idinga ukulungiswa ngamandla kagesi, ngokutshalwa kwezimali okuphezulu kokuqala kanye nezindleko zokusebenza.Indlela yokunciphisa i-oxidation ye-ClO2 I-ClO2 ikhipha u-cha ku-NO2, bese yehlisa i-NO2 iye ku-N2 ngesisombululo samanzi se-Na2SO3.Le ndlela ingahlanganiswa nobuchwepheshe be-desulfurization obumanzi besebenzisa i-NaOH njenge-desulfurizer, kanye nomkhiqizo we-desulfurization reaction Na2SO3 ungasetshenziswa njenge-reductant ye-NO2.Izinga lokuphika lendlela ye-ClO2 lingafinyelela ku-95% futhi i-desulfurization ingenziwa ngesikhathi esifanayo, kodwa amanani e-ClO2 ne-NaOH aphakeme futhi izindleko zokusebenza ziyakhuphuka.

Ubuchwepheshe be-wet flue gas denitration

I-wet flue gas denitration isebenzisa umgomo wokuncibilikisa i-NOx ngesimunca uketshezi ukuze kuhlanzeke igesi ephuma ngamalahle.Isithiyo esikhulu ukuthi akukho okunzima ukuncibilika emanzini, futhi kuvame ukudingeka ukuthi u-oxidize u-NO ku-NO2 kuqala.Ngakho-ke, ngokuvamile, akukho oxidized ukwenza i-NO2 ngokusabela nge-oxidant O3, ClO2 noma i-KMnO4, bese i-NO2 imuncwa amanzi noma isixazululo se-alkaline ukuze ibone ukuphindwa kwegesi ye-flue.

(1) Nciphisa indlela yokumunca i-nitric acid

Ngenxa yokuthi ukuncibilika kwe-no ne-NO2 ku-nitric acid kukhulu kakhulu kunaleyo emanzini (isibonelo, ukuncibilika kwe-no ku-nitric acid ene-concentration ye-12% kukhulu ngokuphindwe izikhathi ezingu-12 kunaleyo emanzini), ubuchwepheshe bokusebenzisa i-nitric ehlanjululwe. Indlela yokumuncwa kwe-asidi yokuthuthukisa izinga lokususa le-NOx isetshenziswe kabanzi.Ngokukhula kokugxilwa kwe-nitric acid, ukumuncwa kwayo kuba ngcono kakhulu, kodwa uma kucatshangelwa ukusetshenziswa kwezimboni kanye nezindleko, ukugxila kwe-nitric acid esetshenziswa ekusebenzeni okungokoqobo kuvame kulawulwa ebangeni lika-15% ~ 20%.Ukusebenza kahle kokumuncwa kwe-NOx nge-dilute nitric acid akuhlobene kuphela nokuhlushwa kwayo, kodwa futhi kuhlobene nokushisa kokumuncwa nokucindezela.Izinga lokushisa eliphansi nokucindezela okuphezulu kuhambisana nokumuncwa kwe-NOx.

(2) Indlela yokumunca isixazululo se-alkali

Kule ndlela, izixazululo ze-alkaline ezifana ne-NaOH, Koh, Na2CO3 kanye ne-NH3 · H2O zisetshenziswa njengama-absorbent ukuze amunce i-NOx ngamakhemikhali, futhi izinga lokumuncwa kwe-ammonia (NH3 · H2O) liphezulu kakhulu.Ukuze kuthuthukiswe ukusebenza kahle kokumuncwa kwe-NOx, ukumuncwa kwezinyathelo ezimbili zesisombululo se-alkali se-ammonia kuthuthukiswa: okokuqala, i-ammonia iphendula ngokuphelele nge-NOx nomhwamuko wamanzi ukukhiqiza umusi omhlophe we-ammonium nitrate;I-NOx engaphenduliwe iphinde imunceke ngesisombululo se-alkaline.I-Nitrate ne-nitrite izokhiqizwa, futhi i-NH4NO3 ne-nh4no2 nazo zizoncibilika kusisombululo se-alkali.Ngemuva kwemijikelezo eminingana yesisombululo sokumuncwa, ngemuva kokuba isisombululo se-alkali sesiphelile, isisombululo esiqukethe i-nitrate ne-nitrite sigxiliwe futhi sifakwe i-crystallized, esingasetshenziswa njengomanyolo.

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