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Ukunyangwa kwe-Denitration yeplanti yombane

Ukunyangwa kwe-Denitration yeplanti yombane

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

Inkcazelo emfutshane:

Ukunciphisa okukhethiweyo kwe-catalytic (SCR) isetyenziselwa ukulawula i-NOx kwi-exhaust ye-injini ye-diesel.I-NH3 okanye i-urea (idla ngokuba yi-urea ene-aqueous solution enobunzima be-32.5%) isetyenziswa njengento yokunciphisa.Ngaphantsi kwemeko yokuba i-O2 i-concentration ingaphezulu kwemiyalelo emibini yobukhulu obuphezulu kunogxininiso lwe-NOx, phantsi kwesenzo sobushushu obuthile kunye ne-catalyst, i-NH3 isetyenziselwa ukunciphisa i-NOx kwi-N2 kunye ne-H2O.Ngenxa yokuba i-NH3 inciphisa ngokukhetha i-NOx ngaphandle kokusabela nge-O2 kuqala, Ngoko ke, ibizwa ngokuba "ukunciphisa i-catalytic ekhethiweyo".


Iinkcukacha zeMveliso

Iithegi zeMveliso

Ukuveliswa kwamandla erhasi yokulahla inkunkuma kubhekiselele ekuveliseni umbane ngesixa esikhulu se-biogas (irhasi yokulahla inkunkuma ye-LFG) eveliswe ngokubiliswa kwe-anaerobic yezinto eziphilayo kwindawo yokulahla inkunkuma, enganciphisi nje kuphela ungcoliseko lomoya olubangelwa kukutshiswa kwenkunkuma, kodwa ikwasebenzisa ubutyebi obusebenzayo.

Intshayelelo yobugcisa

Iziko lamandla ombane liziko lamandla (iplanti yamandla enyukliya, iplanti yamandla omoya, iplanti yamandla elanga, njl.njl.) eguqula uhlobo oluthile lwamandla ekrwada (anjengamanzi, umphunga, idizili, igesi) ibe ngamandla ombane ukulungiselela izibonelelo ezizinzileyo okanye ezothutho.

Denitration treatment of power plant2

Ukhuseleko lokusingqongileyo lwaseGrvnes luphuhlise iseti ye "grvnes" SCR denitration system kunyango lwenitrogen oxides ekuveliseni amandla erhasi yokulahla emva kweminyaka yophando olunzima.

Indlela

I-flue gas denitration ibhekisa ekunciphiseni i-NOx eyenziweyo kwi-N2 ukususa i-NOx kwigesi yombane.Ngokwenkqubo yonyango, inokwahlulwa ibe yi-denitration emanzi kunye ne-denitration eyomileyo.Abanye abaphandi basekhaya nakwamanye amazwe baye baphuhlisa indlela yokunyanga i-NOx inkunkuma yegesi kunye ne-microorganisms.

Denitration treatment of power plant1

Ekubeni ngaphezu kwe-90% ye-NOx kwi-flue gas ekhutshwe kwinkqubo yokutshisa ayikho, kwaye akukho nzima ukuyichitha emanzini, unyango olumanzi lwe-NOx alukwazi ukuqhutyelwa ngendlela elula yokuhlamba.Umgaqo we-flue gas denitration ku-oxidize no-NO2 kunye ne-oxidant, kwaye i-NO2 eyenziweyo ifunxa ngamanzi okanye isisombululo se-alkaline, ukuze iqonde i-denitration.Indlela ye-O3 yokufunxa i-oxidation i-oxidizes no-NO2 nge-O3, kwaye emva koko ifunxa ngamanzi.Ulwelo lwe-HNO3 oluveliswe yile ndlela kufuneka lugxininiswe, kwaye i-O3 kufuneka ilungiswe nge-voltage ephezulu, kunye notyalo-mali oluphezulu kunye neendleko zokusebenza.Indlela yokunciphisa i-oxidation ye-ClO2 I-ClO2 i-oxidizes no-NO2, kwaye inciphisa i-NO2 ukuya kwi-N2 kunye ne-Na2SO3 isisombululo samanzi.Le ndlela inokudibaniswa neteknoloji ye-desulfurization emanzi isebenzisa i-NaOH njenge-desulfurizer, kunye nemveliso ye-desulfurization reaction Na2SO3 ingasetyenziswa njenge-reductant ye-NO2.Izinga le-denitration ye-ClO2 indlela inokufikelela kwi-95% kwaye i-desulfurization inokwenziwa ngexesha elifanayo, kodwa ixabiso le-ClO2 kunye ne-NaOH liphezulu kwaye iindleko zokusebenza zinyuka.

Itekhnoloji ye-wet flue gas denitration

I-wet flue gas denitration isebenzisa umgaqo wokunyibilikisa i-NOx nge-absorbent engamanzi ukucoca irhasi ye-flue yamalahle.Umqobo omkhulu kukuba akukho nzima ukunyibilika emanzini, kwaye kudla ngokufuneka ukuba i-oxidize hayi ukuya ku-NO2 kuqala.Ngoko ke, ngokuqhelekileyo, akukho nto i-oxidized ukwenza i-NO2 ngokusabela nge-oxidant O3, i-ClO2 okanye i-KMnO4, kwaye i-NO2 ifunxelwa ngamanzi okanye isisombululo se-alkaline ukuqonda i-flue gas denitration.

(1) Nciphisa indlela yokufunxa i-nitric acid

Ngenxa yokuba i-solubility ye-no kunye ne-NO2 kwi-asidi ye-nitric ikhulu kakhulu kunaleyo emanzini (umzekelo, ukunyibilika kwe-no kwi-nitric acid kunye ne-concentration ye-12% ngamaxesha angama-12 amakhulu kunawo emanzini), iteknoloji yokusebenzisa i-nitric dilute. indlela yokufunxa i-asidi yokuphucula izinga lokususa le-NOx lisetyenziswe ngokubanzi.Ngokunyuka koxinzelelo lwe-nitric acid, ukusebenza kakuhle kwayo kuphuculwe kakhulu, kodwa ngokuqwalasela ukusetyenziswa kwemizi-mveliso kunye neendleko, ugxininiso lwe-nitric acid olusetyenziswa ekusebenzeni ngokubonakalayo lulawulwa ngokubanzi kuluhlu lwe-15% ~ 20%.Ukusebenza kakuhle kwe-NOx yokuxutywa nge-dilute nitric acid ayihambelani kuphela nokugxininiswa kwayo, kodwa ihambelana nokushisa kokushisa kunye noxinzelelo.Ubushushu obuphantsi kunye noxinzelelo oluphezulu lunceda ukufunxa i-NOx.

(2) Indlela yokufunxa isisombululo sealkaline

Kule ndlela, izisombululo ze-alkaline ezifana ne-NaOH, Koh, Na2CO3 kunye ne-NH3 · I-H2O isetyenziselwa i-absorbents ukuze ithathe i-NOx ngamakhemikhali, kwaye izinga lokuxutywa kwe-ammonia (NH3 · H2O) liphezulu.Ukuze kuphuculwe ngakumbi ukusebenza kakuhle kwe-NOx, i-absorption yamanqanaba amabini e-ammonia isisombululo se-alkali iphuhliswa: okokuqala, i-ammonia iphendula ngokupheleleyo nge-NOx kunye nomphunga wamanzi ukuvelisa umsi omhlophe we-ammonium nitrate;I-NOx engaphendulwanga iphinda ifunxeke ngesisombululo sealkaline.I-Nitrate kunye ne-nitrite iya kuveliswa, kwaye i-NH4NO3 kunye ne-nh4no2 nayo iya kuchithwa kwisisombululo se-alkaline.Emva kwemijikelezo emininzi yesisombululo se-absorption, emva kokuba isisombululo se-alkali siphelile, isisombululo esiqulethe i-nitrate kunye ne-nitrite sigxininiswe kwaye i-crystallized, enokusetyenziswa njengesichumisi.

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