Denitration kurapwa kwesimba rekudyara
Gasi rekugadzira simba remarara (Landfill gas power generation) rinoreva kugadzirwa kwemagetsi kuburikidza nehuwandu hwakawanda hwebiogas (LFG landfill gas) inogadzirwa neanaerobic fermentation ye organic matter mugomba, izvo zvisingangodzikisi kusvibiswa kwemhepo kunokonzerwa nekupisa kwemarara, asiwo kunoshandisa zvakanaka zviwanikwa.
Nhanganyaya yehunyanzvi
Electric power plant isimba remagetsi (nuclear power plant, wind power plant, solar power plant, etc.) rinoshandura imwe nzira yesimba remagetsi (semvura, steam, dhiziri, gasi) kuita simba remagetsi kune zvivakwa zvakagadziriswa kana zvekufambisa.
Nzira
Flue gasi denitration inoreva kudzikisira inogadzirwa NOx kuenda kuN2 kubvisa NOx muflue gasi.Zvinoenderana nemaitiro ekurapa, inogona kukamurwa kuita wet denitration uye yakaoma denitration.Vamwe vatsvakurudzi kumba nekune dzimwe nyika vakagadzirawo nzira yekurapa NOx tsvina gasi ine microorganisms.
Sezvo inopfuura 90% yeNOx mugasi reflue rinobudiswa kubva kumagetsi ekupisa hakuna, uye hapana chakaoma kunyunguduka mumvura, kurapwa kwakanyorova kweNOx hakugoni kuitwa nenzira iri nyore yekugeza.Nheyo yeflue gasi denitration ndeyekuisa oxidize kwete muNO2 ine oxidant, uye inogadzirwa NO2 inotorwa nemvura kana alkaline mhinduro, kuitira kuti ione denitration.O3 oxidation absorption method inoisa kwete kuNO2 ine O3, yozoitora nemvura.HNO3 mvura inogadzirwa neiyi nzira inoda kuiswa mukati, uye O3 inoda kugadzirirwa ine high voltage, ine yakakwira yekutanga kudyara uye mutengo wekushandisa.ClO2 oxidation-reduction method ClO2 oxidize kwete kuNO2, uyezve inoderedza NO2 kusvika kuN2 neNa2SO3 aqueous solution.Iyi nzira inogona kusanganiswa neyakanyorova desulfurization tekinoroji ichishandisa NaOH se desulfurizer, uye desulfurization reaction chigadzirwa Na2SO3 inogona kushandiswa seinobvisa NO2.Chiyero chekudzivirira cheClO2 nzira inogona kusvika 95% uye desulfurization inogona kuitwa panguva imwe chete, asi mitengo yeClO2 neNaOH yakakwirira uye mari yekushanda inowedzera.
Wet flue gasi denitration tekinoroji
Wet flue gasi denitration inoshandisa musimboti wekunyungudutsa NOx ine mvura inonwisa kuchenesa gasi rinopfurwa nemarasha.Chipingamupinyi chikuru ndechekuti aiwa yakaoma kunyungudika mumvura, uye inowanzodiwa kuti oxidize kwete kuNO2 kutanga.Naizvozvo, kazhinji, kwete inoiswa oxidized kuita NO2 nekuita neoxidant O3, ClO2 kana KMnO4, uyezve NO2 inotorwa nemvura kana alkaline mhinduro kuona flue gasi denitration.
(1) Dilute nitric acid absorption nzira
Nekuti kunyungudika kweno uye NO2 mu nitric asidhi yakakura kwazvo kupfuura iri mumvura (somuenzaniso, kunyungudika kweasina mu nitric asidhi ine huwandu hwe12% yakakura kakapetwa ka12 pane iri mumvura), tekinoroji yekushandisa dilute nitric. asidi absorption nzira yekuvandudza chiyero chekubvisa cheNOx chakashandiswa zvakanyanya.Nekuwedzera kweiyo nitric acid yekumisikidza, kugona kwayo kunyura kunovandudzwa zvakanyanya, asi tichifunga nezvekushandiswa kwemaindasitiri uye mutengo, iyo nitric acid yekumisikidza inoshandiswa mukushanda inoshanda inowanzodzorwa muhuwandu hwe15% ~ 20%.Kushanda kweNOx kutorwa ne dilute nitric acid haina hukama chete nekugadzirisa kwayo, asiwo ine hukama nekushisa kwekupisa uye kumanikidzwa.Tembiricha yakaderera uye kudzvanywa kwakanyanya kunobatsira pakutorwa kweNOx.
(2) Alkaline solution absorption method
Munzira iyi, alkaline solutions yakadai seNaOH, Koh, Na2CO3 uye NH3 · H2O inoshandiswa sezviputi zvemakemikari emukemikari NOx, uye kunwa kweammonia (NH3 · H2O) ndiyo yakakwirira.Kuti uwedzere kuvandudza kushandiswa kwehutano hweNOx, kutorwa kwematanho maviri eammonia alkali solution inogadzirwa: kutanga, ammonia inopindirana zvachose neNOx uye mhute yemvura kuti ibudise ammonium nitrate utsi huchena;Iyo isina kubatwa NOx inozowedzera kunyudzwa nealkaline solution.Nitrate uye nitrite ichagadzirwa, uye NH4NO3 uye nh4no2 ichanyungudutswa muine alkaline solution.Mushure mekutenderera kwakati wandei kwemhinduro yekunyudza, mushure meiyo alkali mhinduro yapera, mhinduro ine nitrate uye nitrite inonamirwa uye yakanatswa, inogona kushandiswa sefetiraiza.
