Ihe ndị na-emetọ ihe a na-ewepụta bụ nke kachasị: alụlụ agba na ihe mgbaze organic na-emepụta site na agba ịgba, na ihe mgbaze na-emepụta mgbe a na-ehichapụ volatility. Agba alụlụ tumadi na-abịa site na akụkụ nke ihe mgbaze mkpuchi na ikuku spraying, na ya mejupụtara kwekọrọ na mkpuchi eji. Ihe ndị na-emepụta ihe na-esi na ihe ndị na-emepụta ihe na-esi na ihe mgbaze na ihe ndị na-emepụta ihe na-eme ihe n'usoro ihe mkpuchi, ihe ka ọtụtụ n'ime ha bụ ihe ndị na-adịghị agbanwe agbanwe, na isi ihe na-emetọ ha bụ xylene, benzene, toluene na ndị ọzọ. Ya mere, isi iyi nke gas na-emerụ emerụ na-agbapụta na mkpuchi bụ ụlọ ihe osise na-ese ihe, ụlọ ihicha na ụlọ ihicha.
1. Usoro ọgwụgwọ gas na-ekpofu ahịhịa nke ahịrị mmepụta ụgbọ ala
1.1 Atụmatụ ọgwụgwọ nke organic mkpofu gas na usoro ihicha
The gas a napụtara site na electrophoresis, ọkara mkpuchi na elu mkpuchi ụlọ ihicha bụ nke elu okpomọkụ na elu ịta ihe mkpofu gas, nke kwesịrị ekwesị maka incineration usoro. Ka ọ dị ugbu a, usoro ọgwụgwọ gas na-ekpofu ihe ndị a na-ejikarị eme ihe n'ime usoro ihicha gụnyere: teknụzụ na-emezigharị thermal oxidation technology (RTO), nkà na ụzụ na-eme ka ihe ọkụkụ na-eme ka ọ dịghachi ndụ (RCO), na TNV usoro mgbake ọkụ ọkụ.
1.1.1 Thermal nchekwa ụdị teknụzụ oxidation thermal (RTO)
Thermal oxidator (Regenerative Thermal Oxidizer, RTO) bụ ngwaọrụ nchekwa gburugburu ebe obibi na-echekwa ume maka ọgwụgwọ ikuku gas na-ekpo ọkụ na-adịghị ala ala na nke dị ala. Kwesịrị ekwesị maka olu dị elu, itinye uche dị ala, dabara adaba maka itinye uche gas na-ekpofu ahịhịa n'etiti 100 PPM-20000 PPM. Ọnụ ego ọrụ dị ala, mgbe ikuku gas na-ekpofu ahịhịa dị n'elu 450 PPM, ngwaọrụ RTO adịghị mkpa ịgbakwunye mmanụ enyemaka; ọnụ ọgụgụ nke ịdị ọcha dị elu, ọnụ ọgụgụ ịdị ọcha nke akwa abụọ RTO nwere ike iru 98%, ọnụ ọgụgụ nchacha nke akwa atọ RTO nwere ike iru 99%, na enweghị mmetọ nke abụọ dị ka NOX; njikwa akpaka, ọrụ dị mfe; nchekwa dị elu.
The regenerative okpomọkụ oxidation ngwaọrụ nakweere thermal oxidation usoro na-emeso ndị na-ajụ na obere ịta nke organic mkpofu gas, na seramiiki okpomọkụ nchekwa ihe ndina okpomọkụ Exchanger na-eji naghachi okpomọkụ. Ihe mejupụtara ya bụ akwa nchekwa okpomọkụ seramiiki, valvụ njikwa akpaka, ụlọ combustion na sistemụ njikwa. Isi atụmatụ bụ: akpaka akara valvụ na ala nke okpomọkụ nchekwa akwa jikọọ na oriri isi ọkpọkọ na iyuzucha isi ọkpọkọ karị, na okpomọkụ nchekwa akwa na-echekwara site preheating na organic mkpofu gas na-abata n'ime okpomọkụ nchekwa bed. na ihe nchekwa okpomọkụ seramiiki iji nweta ma hapụ okpomọkụ; na organic mkpofu gas preheated na a ụfọdụ okpomọkụ (760 ℃) na-oxidized na combustion nke combustion ụlọ ime ka carbon dioxide na mmiri, na-ọcha. Ihe owuwu RTO nwere akwa abụọ nwere otu ụlọ ọkụ, akwa akwa seramiiki abụọ na valvụ mgbanwe anọ. Igwe na-ekpo ọkụ na-ekpo ọkụ seramiiki na-emegharị ihe na ngwaọrụ ahụ nwere ike ime ka mgbake okpomọkụ dị elu karịa 95%; Ọ dịghị ma ọ bụ obere mmanụ ụgbọala na-eji mgbe a na-agwọ organic mkpofu gas.
Uru: N'ịnagide oke na-eruba na ntinye dị ala nke gas mkpofu ahịhịa, ọnụ ahịa ọrụ dị obere.
Mwepu: elu otu oge itinye ego, elu combustion okpomọkụ, adịghị adabara ọgwụgwọ nke elu ịta nke organic mkpofu gas, e nwere ọtụtụ nke na-akpụ akpụ akụkụ, mkpa ọzọ mmezi ọrụ.
1.1.2 Nkà na ụzụ combustion thermal catalytic combustion (RCO)
A na-etinye ngwa ọkụ na-eme ka ihe ọkụkụ na-emegharị ahụ (Regenerative Catalytic Oxidizer RCO) ozugbo na ọkara na nnukwu ntinye uche (1000 mg/m3-10000 mg/m3) organic mkpofu gas dị ọcha. Nkà na ụzụ ọgwụgwọ RCO dabara adaba maka nnukwu ọchịchọ maka ọnụego mgbake okpomọkụ, mana ọ dịkwa mma maka otu ahịrị mmepụta ahụ, n'ihi ngwaahịa dị iche iche, ihe mkpofu gas na-agbanwekarị ma ọ bụ ihe mkpofu gas na-agbanwe nke ukwuu. Ọ bụ karịsịa adabara mkpa okpomọkụ ike mgbake nke ụlọ ọrụ ma ọ bụ ihicha okporo osisi ahịrị n'efu gas ọgwụgwọ, na ume mgbake nwere ike ji mee ihe maka ihicha okporo osisi ahịrị, otú iji nweta nzube nke ike ịzọpụta.
The regenerative catalytic combustion technology technology bụ ihe a na-ahụkarị gas siri ike na-adọ mmeghachi omume, nke bụ n'ezie oxidation miri emi nke reactive oxygen ụdị. N'ime usoro oxidation catalytic, mgbasa ozi nke elu nke ihe na-eme ka ihe na-eme ka mkpụrụ ndụ ihe na-emeghachi omume na-emewanyewanye n'elu ihe na-emepụta ihe. Mmetụta nke ihe na-eme ka ọ dị na mbenata ume ọrụ na-eme ka mmeghachi omume oxidation dịkwuo elu ma na-eme ka ọnụego mmeghachi omume oxidation dịkwuo mma. N'okpuru omume nke kpọmkwem catalyst, organic okwu emee na-enweghị eless ọxịdashọn combustion na ala mmalite okpomọkụ (250 ~ 300 ℃), nke na-decomposed n'ime carbon dioxide na mmiri, na tọhapụrụ a nnukwu ego nke okpomọkụ ike.
Ngwa RCO na-abụkarị nke anụ ọkụ ọkụ, ahụ ọkụ na-ekpo ọkụ catalytic, usoro combustion, usoro njikwa akpaka, valvụ akpaka na ọtụtụ usoro ndị ọzọ. N'ime usoro mmepụta nke ụlọ ọrụ mmepụta ihe, gas na-ekpochapụ organic na-abanye na valvụ na-atụgharị nke ngwa ahụ site na onye na-eme ihe na-eme ka ọ bụrụ onye na-emepụta ihe, na gas inlet gas na gas na-emepụta na-ekewa kpamkpam site na valvụ na-atụgharị. Nchekwa ọkụ ọkụ na mgbanwe okpomọkụ nke gas fọrọ nke nta ka ọ bụrụ okpomọkụ nke oxidation catalytic nke oyi akwa catalytic setịpụrụ; gas na-ekpocha ọkụ na-aga n'ihu na-ekpo ọkụ site na ebe a na-ekpo ọkụ (ma ọ bụ site na ọkụ eletrik ma ọ bụ ọkụ ọkụ ọkụ) ma na-echekwa na okpomọkụ nke setịpụrụ; ọ na-abanye na oyi akwa catalytic iji mechaa mmeghachi omume oxidation catalytic, ya bụ, mmeghachi omume na-emepụta carbon dioxide na mmiri, ma hapụ nnukwu ike ọkụ iji nweta mmetụta ọgwụgwọ a chọrọ. The gas catalyzed site oxidation na-abanye na seramiiki ihe oyi akwa 2, na ike okpomọkụ na-ahapụ n'ime ikuku site rotary valvụ. Mgbe emechara ka ọ dị ọcha, ikpochapu okpomọkụ mgbe emechara dị ọcha dị ntakịrị elu karịa okpomọkụ tupu ọgwụgwọ gas n'efu. Sistemu na-arụ ọrụ na-aga n'ihu ma na-agbanwe na-akpaghị aka. Site na ọrụ valvụ na-atụgharị, ihe niile na-ejuputa seramiiki na-emecha usoro okirikiri nke kpo oku, jụrụ oyi na ịdị ọcha, enwere ike nwetaghachi ike ọkụ.
Uru: usoro nhazi dị mfe, akụrụngwa kọmpat, ọrụ a pụrụ ịdabere na ya; ịdị ọcha dị elu, n'ozuzu karịa 98%; obere okpomọkụ ọkụ; obere ego a na-atụfu ego, ọnụ ala arụ ọrụ dị ala, nrụpụta ọkụ ọkụ nwere ike iru karịa 85%; usoro dum na-enweghị mmepụta mmiri na-ekpofu mmiri, usoro nchacha adịghị emepụta mmetọ nke abụọ NOX; Enwere ike iji ngwá ọrụ dị ọcha RCO mee ihe na ime ụlọ ihicha, a pụrụ iji gas na-eme ka ọ dị ọcha mee ihe ozugbo n'ime ụlọ ihicha, iji nweta nzube nke ịchekwa ike na mbelata ikuku;
Mwepu: na catalytic combustion ngwaọrụ bụ naanị adabara ọgwụgwọ nke organic n'efu gas na ala esi ebe organic components na ala ash ọdịnaya, na n'efu gas ọgwụgwọ nke nnyapade bekee dị ka mmanu mmanu anwụrụ adịghị adabara, na ihe na-akpali akpali kwesịrị nsi; ịta nke organic mkpofu gas bụ n'okpuru 20%.
1.1.3TNV Sistemụ incineration ụdị eji emegharị ihe
Recycling ụdị thermal incineration usoro (German Thermische Nachverbrennung TNV) bụ ojiji nke gas ma ọ bụ mmanụ ụgbọala kpọmkwem combustion kpo oku n'efu gas nwere organic mgbaze, n'okpuru edinam nke elu okpomọkụ, organic ihe mgbaze molekul oxidation decomposition n'ime carbon dioxide na mmiri, na elu okpomọkụ flue gas. site na-akwado multistage okpomọkụ nyefe ngwaọrụ kpo oku usoro mkpa ikuku ma ọ bụ mmiri ọkụ, zuru recycling oxidation decomposition nke organic n'efu gas okpomọkụ ike, belata ike oriri nke dum usoro. Ya mere, usoro TNV bụ ụzọ dị mma ma dị mma iji na-emeso gas na-ekpofu ihe nke nwere ihe mgbaze organic mgbe usoro mmepụta chọrọ ike ọkụ. N'ihi na ọhụrụ electrophoretic agba mkpuchi mmepụta akara, TNV mgbake thermal incineration usoro na-nakweere n'ozuzu.
Usoro TNV nwere akụkụ atọ: ihe mkpofu gas na-ekpo ọkụ na ọkụ ọkụ, usoro ikpo ọkụ ikuku na usoro mgbanwe ikuku ọhụrụ. Ngwa ikpo ọkụ na-ekpo ọkụ gas na-ekpo ọkụ n'ime sistemu bụ akụkụ bụ isi nke TNV, nke mejupụtara ahụ ọkụ, ọnụ ụlọ combustion, ihe na-ekpo ọkụ, ọkụ na nnukwu flue na-achịkwa valvụ. Ya na-arụ ọrụ usoro bụ: na a elu nsogbu isi onye ofufe ga organic n'efu gas si ihicha ụlọ, mgbe n'efu gas incineration Central kpo oku ngwaọrụ wuru na-ekpo ọkụ Exchanger preheating, na combustion ụlọ, na mgbe ahụ site na ọkụ kpo oku, na elu okpomọkụ ( ihe dị ka 750 ℃) ka ikuku oxygen na-emebi emebi, ire ere nke gas na-ekpofu ahịhịa n'ime carbon dioxide na mmiri. A na-emepụta gas flue dị elu nke a na-emepụta site na onye na-ekpo ọkụ na-ekpo ọkụ na isi ọkụ ọkụ na ọkụ ọkụ. Igwe ọkụ na-ekpo ọkụ na-ekpo ọkụ na-ekpo ọkụ na-ekesa ikuku n'ime ụlọ ihicha iji nye ike okpomọkụ dị mkpa maka ime ụlọ ihicha. A na-edobe ngwaọrụ na-ebufe ọkụ ikuku ọhụrụ na njedebe nke usoro ahụ iji weghachite ikpo ọkụ nke usoro maka mgbake ikpeazụ. A na-ekpocha ikuku ọhụrụ nke ụlọ ihicha na-ekpo ọkụ na-ekpo ọkụ ma tinyezie ya n'ime ụlọ ihicha. Na mgbakwunye, enwerekwa valvụ na-achịkwa ọkụ eletrik na ọkpọkọ ọkpọkọ ikuku gas, nke a na-eji emezi ọkụ ikuku gas na mpụga ngwaọrụ ahụ, enwere ike ịchịkwa ikuku ikuku ọkụ na ihe dịka 160 ℃.
Njirimara nke ihe mkpofu gas incineration Central kpo oku ngwaọrụ gụnyere: oge ọnụnọ nke organic mkpofu gas n'ime ụlọ combustion bụ 1 ~ 2s; ọnụ ọgụgụ ire ere nke gas mkpofu ahịhịa karịrị 99%; ọnụego mgbake okpomọkụ nwere ike iru 76%; na nhazi nhazi nke mmepụta ọkụ nwere ike iru 26 ∶ 1, ruo 40 ∶ 1.
Ọdịmma: mgbe a na-emeso obere ikuku organic mkpofu gas, ọnụ ahịa ọrụ dị elu; tubular okpomọkụ Exchanger bụ naanị na-aga n'ihu na-arụ ọrụ, o nwere ogologo ndụ.
1.2 Atụmatụ ọgwụgwọ nke organic mkpofu gas n'ime ụlọ agba agba na ụlọ ihicha
Gas a na-esi n'ime ụlọ agba agba na ụlọ ihicha bụ obere ntinye uche, nnukwu ọnụ ọgụgụ na-asọpụta na ikuku okpomọkụ na-ekpo ọkụ, na isi ihe ndị na-emerụ emerụ bụ hydrocarbons aromatic, mmanya ethers na ester organic solvents. Ugbu a, ndị mba ọzọ ọzọ tozuru okè usoro bụ: mbụ organic n'efu gas ịta iji belata mkpokọta ego nke organic mkpofu gas, na mbụ adsorption usoro (ọrụ carbon ma ọ bụ zeolite dị ka adsorbent) maka ala ịta nke ụlọ okpomọkụ ịgba agba iyuzucha adsorption, nwere oke ikuku gas na-ekpochapụ, gas na-ekpochasị elu na-eji ọkụ catalytic ma ọ bụ usoro mgba ọkụ ọkụ na-emegharị.
1.2.1 carbon adsorption na-arụ ọrụ--desorption na nchacha ngwaọrụ
Iji mmanụ aṅụ na-arụ ọrụ unyi dị ka adsorbent, jikọtara ya na ụkpụrụ nke adsorption ọcha, desorption regeneration na ịta nke VOC na catalytic combustion, elu ikuku olu, ala ịta nke organic n'efu gas site na mmanụ aṅụ na-arụ ọrụ carbon adsorption iji nweta nzube nke ikuku ọcha, Mgbe carbon na-arụ ọrụ na-ejupụta ma jiri ikuku na-ekpo ọkụ mee ka carbon na-arụ ọrụ na-arụ ọrụ, a na-ezigara ihe ndị na-emepụta ihe na-emepụta ihe na-eme ka ọ bụrụ ihe na-eme ka ọ bụrụ ihe na-ekpo ọkụ na-ekpo ọkụ maka ọkụ ọkụ, ihe ndị na-emepụta ihe na-eme ka ọ bụrụ carbon dioxide na mmiri na-adịghị emerụ ahụ, gas na-ekpo ọkụ ọkụ na-ekpo ọkụ. oyi ikuku site a okpomọkụ Exchanger, Ụfọdụ emission nke jụrụ gas mgbe okpomọkụ mgbanwe, Part maka desorbitory regeneration nke mmanụ aṅụ rụọ ọrụ unyi, Iji nweta nzube nke n'efu okpomọkụ itinye n'ọrụ na ike ịzọpụta. Ngwa niile mejupụtara ihe nzacha tupu, akwa adsorption, akwa combustion catalytic, ire ere ọkụ, fan metụtara, valvụ, wdg.
Emebere ngwaọrụ ịsacha carbon adsorption-desorption dị ka ụkpụrụ abụọ bụ isi nke adsorption na combustion catalytic si dị, na-eji ụzọ gas okpukpu abụọ na-arụ ọrụ na-aga n'ihu, ọnụ ụlọ combustion catalytic, akwa adsorption abụọ na-eji ọzọ. Mbụ organic mkpofu gas na-arụ ọrụ carbon adsorption, mgbe ngwa ngwa saturation kwụsị adsorption, na mgbe ahụ na-eji na-ekpo ọkụ ikuku eruba wepụ organic okwu si arụ ọrụ carbon na-eme ka carbon arụ ọrụ regeneration; A na-etinye ihe ndị dị ndụ (nleba anya ọtụtụ ugboro dị elu karịa nke mbụ) ma ziga ya n'ime ụlọ combustion catalytic combustion n'ime carbon dioxide na mmiri vapor mwụpụ. Mgbe ntinye nke gas na-ekpofu ahịhịa ruru ihe karịrị 2000 PPm, gas na-ekpofu ahịhịa nwere ike ịnọgide na-enwe ọkụ ọkụ na-akpaghị aka na akwa catalytic na-enweghị kpo oku mpụga. A na-ahapụ akụkụ nke gas na-ekpochapụ ọkụ n'ime ikuku, na ọtụtụ n'ime ya na-ezigara n'àkwà adsorption maka mmụgharị nke carbon na-arụ ọrụ. Nke a nwere ike izute combustion na adsorption nke ike ọkụ chọrọ, iji nweta nzube nke ịzọpụta ike. Mweghachi ahụ nwere ike ịbanye na mgbasa ozi ọzọ; na desorption, ọrụ nhicha ahụ nwere ike ịrụ ọrụ site na akwa adsorption ọzọ, nke kwesịrị ekwesị maka ma ọrụ na-aga n'ihu ma na-arụ ọrụ oge.
Nrụ ọrụ nka na njirimara: arụmọrụ kwụsiri ike, usoro dị mfe, nchekwa na ntụkwasị obi, nchekwa ike na nchekwa ọrụ, enweghị mmetọ nke abụọ. Akụrụngwa na-ekpuchi obere mpaghara ma nwee obere ibu. Kwesịrị ekwesị maka ojiji na oke olu. Ihe ndina carbon na-arụ ọrụ nke na-eme ka gas na-ekpofu ahịhịa na-eji gas na-ekpofu ọkụ mgbe ọkụ ọkụ na-ekpo ọkụ na-eme ka ọ dịghachi ndụ, a na-ezigakwa gas na-ekpo ọkụ na ụlọ combustion catalytic maka ime ka ọ dị ọcha, na-enweghị ike mpụga, na ike ịzọpụta mmetụta dị ịrịba ama. Ọdịmma ya bụ na carbon arụ ọrụ dị mkpụmkpụ yana ụgwọ ọrụ ya dị elu.
1.2.2 Zeolite nnyefe wheel adsorption - desorption ngwaọrụ dị ọcha
Ihe ndị bụ isi nke zeolite bụ: silicon, aluminum, nwere ikike mgbasa ozi, enwere ike iji ya mee ihe dị ka adsorbent; zeolite na-agba ọsọ bụ iji e ji mara zeolite kpọmkwem aperture na adsorption na desorption ikike maka organic mmetọ, nke mere na VOC iyuzucha gas na ala ịta na elu ịta, nwere ike ibelata ọrụ na-eri nke azụ-ọgwụgwụ ikpeazụ ọgwụgwọ akụrụngwa. Njirimara ngwaọrụ ya dị mma maka ọgwụgwọ nke nnukwu mmiri na-asọpụta, obere ntinye uche, nwere ihe dị iche iche nke organic. Ihe ọghọm bụ na ntinye ego mbụ dị elu.
Zeolite na-agba ọsọ adsorption-ọcha ngwaọrụ bụ ngwaọrụ dị ọcha gas nke nwere ike na-arụ ọrụ mgbasa ozi na desorption na-aga n'ihu. A na-ekewa akụkụ abụọ nke wiil zeolite na mpaghara atọ site na ngwaọrụ mkpuchi pụrụ iche: mpaghara mgbasa ozi, desorption (mmeghachite) mpaghara na ebe dị jụụ. Usoro na-arụ ọrụ nke usoro bụ: zeolites na-agbagharị wheel na-agbagharị na-aga n'ihu na obere ọsọ ọsọ, Circulation site na mpaghara mgbasa ozi, desorption (mmeghachite) mpaghara na ebe dị jụụ; Mgbe obere ịta ahụhụ na gale olu iyuzucha gas na-aga n'ihu na-agafe ebe mgbasa ozi nke onye na-agba ọsọ, VOC na ikuku gas na-adaba na zeolite nke wheel na-atụgharị, Direct emission mgbe adsorption na ịdị ọcha; The organic ihe mgbaze adsorbed site wheel na-eziga na desorption (mmeghachi omume) mpaghara na adiana nke wheel, Mgbe ahụ, na obere ikuku olu okpomọkụ ikuku nọgidere site na desorption ebe, The VOC adsorbed na wheel na-emegharị na desorption mpaghara. A na-ahapụ ikuku ikuku VOC na ikuku ọkụ; The wheel ka jụrụ ebe maka jụrụ jụrụ nwere ike re-adsorption, Na mgbe niile adiana nke na-agbagharị wheel, Adsorption, desorption, na jụrụ okirikiri a rụrụ, Gbaa n'aka na-aga n'ihu na kwụsiri ike ọrụ nke n'efu gas ọgwụgwọ.
Ngwaọrụ na-agba ọsọ zeolite bụ n'ezie ihe ntinye uche, a na-ekewa gas na-ekpochapụ nke nwere ihe mgbaze organic ụzọ abụọ: ikuku dị ọcha nke nwere ike ịwepụ ozugbo, na ikuku ejigharị ya nwere nnukwu ihe mgbaze organic. Ikuku dị ọcha nke nwere ike ịpụ ozugbo ma nwee ike ịmegharị ya na usoro ikuku ventilashị nke agba agba; ihe dị elu nke VOC gas bụ ihe dị ka ugboro 10 nke ntinye uche VOC tupu ịbanye na usoro. A na-agwọta gas gbanyere mkpọrọgwụ site na ọkụ ọkụ dị elu site na sistemụ ọkụ mgbake TNV (ma ọ bụ akụrụngwa ndị ọzọ). Okpomọkụ sitere na ọkụ na-ekpo ọkụ na-ekpocha ụlọ na-ekpo ọkụ na zeolite na-ekpo ọkụ ọkụ n'otu n'otu, na ike ọkụ na-arụ ọrụ zuru oke iji nweta mmetụta nke ịzọpụta ike na mbelata ikuku.
Nrụ ọrụ teknụzụ na njirimara: nhazi dị mfe, mmezi dị mfe, ogologo ndụ ọrụ; elu absorption na iwepu arụmọrụ, tọghata mbụ elu ifufe olu na ala ịta VOC mkpofu gas n'ime ala ikuku olu na elu ịta ahụhụ n'efu gas, belata na-eri nke azụ-ọgwụgwụ ikpeazụ ọgwụgwọ akụrụngwa; oke nrụgide dị ala, nwere ike belata oriri ike ike nke ukwuu; Nkwadebe n'ozuzu usoro na imewe modular, nke nwere ohere kacha nta chọrọ, ma na-enye ọnọdụ njikwa na-aga n'ihu na enweghị onye; ọ nwere ike iru ọkọlọtọ mba; adsorbent na-eji zeolite na-abụghị combustible, ojiji dị mma; mwepu bụ otu oge itinye ego na ọnụ ahịa dị elu.
Oge nzipu: Jan-03-2023
