Ọgwụgwọ dentration nke ụlọ ọrụ ike
Ọgbọ ike ikuku nke ala na-ezo aka n'ọgbọ ike site na nnukwu gas biogas (LFG landfill gas) nke anaerobic fermentation nke ihe ndị dị ndụ na-emepụta n'ime ala, nke na-abụghị nanị na-ebelata mmetọ ikuku nke ọkụ n'efu na-akpata, ma na-ejikwa ihe onwunwe eme ihe nke ọma.
Nkà okwu mmeghe
Igwe ọkụ eletrik bụ ụlọ ọrụ ọkụ (ụlọ ọrụ nuklia, ikuku ikuku, ọkụ ọkụ anyanwụ, wdg) nke na-agbanwe ụdị ike ọkụ (dị ka mmiri, uzuoku, mmanụ dizel, gas) n'ime ike ọkụ eletrik maka ụlọ edozi ma ọ bụ njem.
Usoro
Ntugharị ikuku gas na-ezo aka ibelata NOx emepụtara gaa na N2 iji wepụ NOx na gas flue.Dị ka usoro ọgwụgwọ ahụ si dị, enwere ike kewaa ya n'ime denitration mmiri na akọrọ akọrọ.Ụfọdụ ndị na-eme nchọpụta nọ n'ụlọ na ná mba ọzọ ewepụtala usoro a na-eji microorganisms agwọ gas mkpofu NOx.
Ebe ọ bụ na ihe karịrị 90% nke NOx na flue gas na-esi na usoro combustion bụ mba, ọ dịghịkwa siri ike igbari na mmiri, ọgwụgwọ mmiri nke NOx enweghị ike ime site na usoro ịsa ahụ dị mfe.The ụkpụrụ nke flue gas denitration bụ oxidize mba n'ime NO2 na oxidant, na eme NO2 na-etinye obi gị dum mmiri ma ọ bụ alkaline ngwọta, nke mere na-aghọta denitration.Usoro absorption nke O3 oxidizes mba NO2 na O3, wee tinye ya na mmiri.Mmiri HNO3 nke usoro a na-emepụta kwesịrị itinye uche, na O3 kwesịrị ka a kwadebe ya na nnukwu voltaji, yana nnukwu ego mmalite na ụgwọ ọrụ.Ụzọ mbelata oxidation ClO2 ClO2 na-eme ka ọ bụrụ NO2, wee belata NO2 gaa na N2 na ngwọta mmiri Na2SO3.Enwere ike ijikọ usoro a na teknụzụ desulfurization mmiri na-eji NaOH dị ka desulfurizer, na ngwaahịa mmeghachi omume desulfurization Na2SO3 nwere ike iji dị ka mbelata nke NO2.Ọnụego denitration nke usoro ClO2 nwere ike iru 95% na desulfurization nwere ike ime n'otu oge ahụ, mana ọnụahịa nke ClO2 na NaOH dị elu na ọnụ ahịa ọrụ na-abawanye.
Nkà na ụzụ denitration nke flue flue
Mwepu ikuku mmiri mmiri na-eji ụkpụrụ nke igbari NOx na mmiri mmiri na-amịkọrọ mmiri iji sachaa gas flue na-agba ọkụ.Ihe mgbochi kachasị bụ na ọ dịghị siri ike igbari na mmiri, ọ na-achọkarịkwa ka ọ bụrụ oxidize mba NO2 mbụ.Ya mere, n'ozuzu, ọ dịghị bụ oxidized na-etolite NO2 site reacting na oxidant O3, ClO2 ma ọ bụ KMnO4, na mgbe ahụ NO2 na-etinye obi gị dum mmiri ma ọ bụ alkaline ngwọta na-aghọta flue gas denitration.
(1) Ghichaa usoro nnabata nitric acid
N'ihi na solubility nke mba na NO2 na nitric acid dị ukwuu karịa na mmiri (dịka ọmụmaatụ, solubility nke ọ dịghị na nitric acid na ntinye nke 12% bụ ugboro 12 karịa nke ahụ na mmiri), nkà na ụzụ nke iji nitric dilute. Usoro nnabata acid iji meziwanye ọnụego mwepụ nke NOx ejirila ọtụtụ ebe.Site na mmụba nke nitric acid ịta ahụhụ, a na-emeziwanye arụmọrụ ya nke ọma, mana n'ịtụle ngwa ụlọ ọrụ na ọnụ ahịa ya, a na-achịkwa mkpokọta nitric acid a na-eji arụ ọrụ bara uru na oke nke 15% ~ 20%.Ịrụ ọrụ nke NOx absorption site na itughari nitric acid abụghị naanị ihe metụtara itinye uche ya, kamakwa ọ na-emetụta ọnọdụ okpomọkụ na nrụgide.Obere okpomọkụ na nrụgide dị elu na-enye aka na ntinye nke NOx.
(2) Usoro absorption ngwọta alkaline
N'ime usoro a, a na-eji ngwọta alkaline dị ka NaOH, Koh, Na2CO3 na NH3 · H2O dị ka ihe na-emepụta ihe na-etinye aka na NOx, na ọnụ ọgụgụ absorption nke amonia (NH3 · H2O) bụ nke kachasị elu.Iji nwetakwuo mma absorption arụmọrụ nke NOx, a na-emepụta absorption nke abụọ nke amonia alkali ngwọta: nke mbụ, amonia na-emeghachi omume kpamkpam na NOx na mmiri vapor na-emepụta ammonium nitrate ọcha anwụrụ ọkụ;A na-etinyekwa NOx na-adịghị emeghachi omume na ngwọta alkaline ọzọ.Nitrate na nitrite ga-emepụta, na NH4NO3 na nh4no2 ga-agbazekwa na ngwọta alkaline.Mgbe ọtụtụ cycles nke ngwọta absorption gasịrị, mgbe ngwọta alkali gwụchara, ihe ngwọta nwere nitrate na nitrite na-etinye uche na crystallized, nke a pụrụ iji mee ihe dị ka fatịlaịza.
