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Denitration mankhwala a magetsi

Denitration mankhwala a magetsi

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

Kufotokozera Kwachidule:

Selective catalytic reduction (SCR) imagwiritsidwa ntchito kuwongolera NOx mu utsi wa injini ya dizilo.NH3 kapena urea (nthawi zambiri njira yamadzi ya urea yokhala ndi chiŵerengero cha 32.5%) imagwiritsidwa ntchito ngati kuchepetsa.Pansi pa zomwe O2 ndende ndi yoposa maulamuliro awiri apamwamba kuposa NOx ndende, pansi pa kutentha kwina ndi chothandizira, NH3 imagwiritsidwa ntchito kuchepetsa NOx ku N2 ndi H2O.Chifukwa NH3 imachepetsa NOx popanda kuchitapo kanthu ndi O2 poyamba, imatchedwa "selective catalytic reduction".


Tsatanetsatane wa Zamalonda

Zogulitsa Tags

Kutayira mpweya mpweya mphamvu m'badwo amatanthauza mphamvu m'badwo kudzera kuchuluka kwa biogas (LFG zotayira mpweya mpweya) opangidwa ndi nayonso mphamvu anaerobic wa zinthu organic mu kutayirapo, amene osati kumachepetsa kuipitsidwa kwa mpweya chifukwa cha zinyalala incineration, komanso amagwiritsa ntchito bwino chuma.

Chiyambi chaukadaulo

Malo opangira magetsi ndi malo opangira magetsi (malo opangira magetsi a nyukiliya, malo opangira magetsi amphepo, gwero lamagetsi adzuwa, ndi zina zotero) zomwe zimatembenuza mtundu wina wa mphamvu yaiwisi (monga madzi, nthunzi, dizilo, gasi) kukhala mphamvu yamagetsi pazida zokhazikika kapena zoyendera.

Denitration treatment of power plant2

Chitetezo cha chilengedwe cha Grvnes chapanga "grvnes" SCR denitration system yochizira ma nitrogen oxides popanga magetsi otayira mpweya pakatha zaka zambiri za kafukufuku wovuta.

Njira

Kusiyanitsa kwa mpweya wa flue kumatanthauza kuchepetsa NOx yopangidwa kukhala N2 kuchotsa NOx mu gasi wa flue.Malingana ndi ndondomeko ya chithandizo, ikhoza kugawidwa mu denitration yonyowa ndi kutsutsidwa kowuma.Ofufuza ena kunyumba ndi kunja apanganso njira yothetsera mpweya wonyansa wa NOx ndi tizilombo toyambitsa matenda.

Denitration treatment of power plant1

Popeza kuti kuposa 90% ya NOx mu mpweya wa flue wotulutsidwa kuchokera ku dongosolo loyaka moto palibe, ndipo palibe chovuta kusungunuka m'madzi, chithandizo chonyowa cha NOx sichikhoza kuchitidwa ndi njira yosavuta yochapa.Mfundo ya kutulutsa mpweya wa flue ndikulowetsa mu NO2 ndi oxidant, ndipo NO2 yopangidwa imatengedwa ndi madzi kapena alkaline yankho, kuti izindikire kutanthauzira.O3 mayamwidwe makutidwe ndi okosijeni njira oxidize ayi NO2 ndi O3, ndiyeno kuyamwa ndi madzi.Madzi a HNO3 opangidwa ndi njirayi ayenera kukhazikika, ndipo O3 iyenera kukonzekera ndi voteji yayikulu, yokhala ndi ndalama zambiri zoyambira komanso mtengo wogwirira ntchito.Njira yochepetsera makutidwe ndi okosijeni ya ClO2 ClO2 imathira ayi ku NO2, kenako imachepetsa NO2 kukhala N2 ndi njira yamadzi ya Na2SO3.Njira imeneyi akhoza pamodzi ndi chonyowa desulfurization luso ntchito NaOH monga desulfurizer, ndi desulfurization anachita mankhwala Na2SO3 angagwiritsidwe ntchito ngati reductant wa NO2.Mlingo wa denitration wa njira ya ClO2 ukhoza kufika 95% ndipo desulfurization imatha kuchitika nthawi imodzi, koma mitengo ya ClO2 ndi NaOH ndi yokwera ndipo mtengo wantchito ukuwonjezeka.

Tekinoloje yowunikira gasi wonyowa

Kuzindikira kwa gasi wonyowa kumagwiritsa ntchito mfundo yosungunula NOx yokhala ndi zotsekemera zamadzimadzi kuti ziyeretse mpweya wamoto wa malasha.Chopinga chachikulu ndikuti palibe chomwe chimakhala chovuta kusungunuka m'madzi, ndipo nthawi zambiri chimafunika kuti oxidize ayi ku NO2 poyamba.Choncho, kawirikawiri, palibe oxidized kupanga NO2 pochita ndi okosijeni O3, ClO2 kapena KMnO4, ndiyeno NO2 otengedwa ndi madzi kapena zamchere njira kuzindikira flue mpweya denitration.

(1) Njira yochepetsera nitric acid mayamwidwe

Chifukwa kusungunuka kwa no ndi NO2 mu asidi nitric ndi kwakukulu kuposa m'madzi (mwachitsanzo, kusungunuka kwa palibe mu nitric acid ndi ndende ya 12% ndi 12 nthawi zambiri kuposa m'madzi), teknoloji yogwiritsira ntchito nitric . Njira yamayamwidwe a asidi kuti muchepetse kuchuluka kwa NOx yakhala ikugwiritsidwa ntchito kwambiri.Ndi kuchuluka kwa nitric acid ndende, kuyamwa kwake kumakhala bwino kwambiri, koma poganizira ntchito zamafakitale ndi mtengo wake, ndende ya nitric acid yomwe imagwiritsidwa ntchito pochita opaleshoni nthawi zambiri imayendetsedwa mu 15% ~ 20%.Kuchita bwino kwa mayamwidwe a NOx mwa kuchepetsa nitric acid sikungokhudzana ndi ndende yake, komanso kumagwirizana ndi kutentha kwa kuyamwa ndi kupanikizika.Kutentha kochepa komanso kuthamanga kwambiri kumathandizira kuyamwa kwa NOx.

(2) Njira yamayamwidwe amchere

Mwa njira iyi, njira za alkaline monga NaOH, Koh, Na2CO3 ndi NH3 · H2O zimagwiritsidwa ntchito ngati zotsekemera kuti zilowetse NOx, ndipo kuchuluka kwa ammonia (NH3 · H2O) ndipamwamba kwambiri.Pofuna kupititsa patsogolo kuyamwa bwino kwa NOx, kuyamwa kwa magawo awiri a ammonia alkali solution kumapangidwa: choyamba, ammonia amachitira kwathunthu ndi NOx ndi nthunzi wamadzi kuti apange utsi woyera wa ammonium nitrate;NOx yosakhudzidwa imalowetsedwanso ndi yankho la alkaline.Nitrate ndi nitrite zidzapangidwa, ndipo NH4NO3 ndi nh4no2 zidzasungunukanso mumchere wamchere.Pambuyo pa njira zingapo zoyamwitsa, njira ya alkali ikatha, yankho lomwe lili ndi nitrate ndi nitrite limayikidwa ndikuwunikiridwa, lomwe lingagwiritsidwe ntchito ngati feteleza.

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