AUTOPARTS UCHWEPHESHE

Inkampani engu-Pingxiang Hualian Chemical Ceramic Co., Ltd.

Isiguquli se-ceramic catalytic se-honeycomb esine-metallic carrier

Incazelo emfushane:

I-ceramic yekhekhe lezinyosi uhlobo lwesakhi se-ceramic yekhekhe lezinyosi ezinodonga olungenazimbotshana noluncane.Ukuma kwe-cross-section yemigodi yezinyosi ezisatshalaliswa ngokulinganayo kungaba yi-hexagonal, isikwele, unxantathu, isiyingi nezinye izibalo zejometri.


Imininingwane Yomkhiqizo

Omaka bomkhiqizo

Imikhiqizo ye-ceramic yezinyosi ineziteshi eziningi zokugeleza okufanayo, ngakho-ke ukulahlekelwa kwengcindezi yokugeleza kwegesi kuncane, futhi ukusatshalaliswa kokugeleza kuyo yonke ingxenye kuhle.Ngokuhambisana nesakhiwo senethiwekhi esinodonga oluncane lwezitsha zobumba lwekhekheba lezinyosi, zinesisindo esilula, amandla athile aphezulu kanye nendawo enkulu ethize.Zisetshenziswa kabanzi kuma-heaters, ama-radiators, abathwali be-catalyst, izinto zokufaka umsindo, njll.

Emkhakheni wokuhlanzwa kwe-exhaust yezimoto, ama-ceramics wezinyosi adlala indima ebaluleke kakhulu njengesithwali se-catalyst.Lokhu kungenxa yokuthi ukusabela kwe-catalytic kombhobho wezimoto kungenza kusebenze izingxenye eziyingozi (ezifana ne-carbon monoxide, ama-hydrocarbon, ama-nitrogen oxides, njll.) emkhathini futhi zenze ukusabela kwamakhemikhali ukuziguqulela ku-carbon dioxide, amanzi ne-nitrogen engenangozi.I-ceramics ye-honeycomb inikeza indawo ebalulekile yokunamathela kwama-catalysts.Isithwali se-catalyst yemoto sibeka phambili izidingo ezithile ezilandelayo zamakhekheba ezinyosi:

Ukuzinza okuhle kokushisa.Izinga lokushisa lokukhipha injini yemoto liphakathi kuka-250-950 ℃, kodwa ngezinye izikhathi ngisho nangaphezu kuka-950 ℃, okungaholela ekuguqulweni kwesigaba sezinto ezisekelayo ekushiseni okuphezulu, okuthinta umsebenzi nempilo yesevisi ye-catalyst, ngakho-ke izidingo ukuzinza okushisayo kokusekelwa kwe-catalyst kuphezulu.

Amandla aphezulu emishini.I-exhaust yenjini inokushaqeka okushisayo, indawo yomgwaqo enezingqimba kanye nokudlidliza kwesilinda, konke okubeka phambili izimfuneko zamandla zosekelo lwe-catalyst.

Indawo enkulu ethize.Indawo ethize yokusekelwa kwe-catalyst inkulu, ehambisana nokunamathiselwe nokusabalalisa kwezinto ezisebenzayo ze-catalyst, ngakho-ke ingathuthukisa kakhulu umsebenzi we-catalyst.

Amandla okushisa aphansi.Lapho injini iqalwa ngokubanda, isiqukathi sikhiqiza i-carbon monoxide eyengeziwe nama-hydrocarbon.Uma amandla okushisa enkampani yenethiwekhi ephansi, i-catalyst ingafinyelela izinga lokushisa lokusebenza ngesikhathi esifushane futhi idlale indima ye-catalytic ngokushesha ngangokunokwenzeka.

Ukumelana nokugqwala okuhle.I-exhaust yezimoto iqukethe inqwaba yamagesi ezonakalisayo.

Ukumelana komoya omncane.Ukufakwa kwe-catalyst carrier kuzokhiqiza ukucindezela emuva enjini, okungafanele kuthinte ukusebenza okuvamile kwenjini ngangokunokwenzeka.Ngakho-ke, kuthenjwa ukuthi umehluko wengcindezi owenziwe ngemuva kokuthi ukugeleza komoya kudlula kusithwali kuzoba mncane ngangokunokwenzeka.

I-coefficient ephansi yokwandisa okushisayo.I-coefficient ephansi yokunwetshwa kwe-thermal ihambisana nokusekelwa kwe-catalyst ukumelana nendawo yokusebenza yokupholisa okusheshayo nokushisa okusheshayo ngaphandle kokuqhekeka.

Njengamanje, ama-ceramics e-cordierite honeycomb asetshenziswa kakhulu njengesithwali se-catalyst catalyst yemoto.I-Ceramics yekhekheba lezinyosi i-Cordierite yalungiswa okokuqala yinkampani yase-American Corning (yebo, ingilazi ye-Corning gorilla, ehlinzeka ngendiza yengilazi yeselula ye-Apple) ngokubumba i-extrusion ngeminyaka yawo-1960.

Ngokwakhiwa kwe-extrusion ye-cordierite honeycomb ceramics, kunezinketho ezimbili zenqubo: ukudla okuluhlaza kanye ne-clinker, futhi umehluko omkhulu phakathi kwezinqubo ezimbili ukuthi kukhona yini isixhumanisi se-pre synthesis ye-cordierite powder.Esikhathini senqubo ye-clinker, i-cordierite powder ihlanganiswa kuqala, bese ikhishwa;Enqubweni yokudla okuluhlaza, i-cordierite ihlanganiswa nge-extrusion kanye ne-sintering.Umfanekiso wesi-4 ubonisa izinqubo ezimbili zokukhiqiza zezinyosi ze-cordierite.

Ngaphezu kwezinqubo ezihlukene zokukhiqiza, izinto zokusetshenziswa ze-cordierite honeycomb ceramics zivela emithonjeni ehlukahlukene, futhi abakhiqizi abakhulu nabo bahlukile.Njengoba kukhonjisiwe kuMfanekiso 5, singabona ukuhlukahluka kokukhethwa kwempahla eluhlaza.

Ngenxa yezidingo eziphakeme zokusebenza kwezitsha zobumba lwekhekheba lezinyosi (amaphuzu amaningi ayisihluthulelo abhalwe ngenhla), ukucaciswa kwezinto ezingavuthiwe kuqinile.Isibonelo, kucacisiwe ukuthi usayizi wezinhlayiyana ezimaphakathi ze-cordierite powder ungaphakathi kwe-10-50um, usayizi wezinhlayiyana ojwayelekile womthombo we-talc okungenani u-8um, ubukhulu bezinhlayiyana ezimaphakathi zomthombo we-alumina awukho ngaphezu kwe-5um, kanti isilinganiso esimaphakathi usayizi wezinhlayiyana ze-kaolin kanye nengxube ye-kaolin eqoshiwe ayidluli ku-6um.

Ngaphandle kobukhulu bezinhlayiyana, eminyakeni yamuva, kuphinde kwatholakala ukuthi i-morphology ye-cordierite powder inethonya elikhulu kumkhiqizo wokugcina.Ngenxa yokuthi umumo weshidi une-anisotropy eqinile ngesikhathi sokubunjwa kwe-extrusion (lokhu kwethulwe esihlokweni esedlule mayelana nokubunjwa kwe-extrusion. Kunengqondo ukuthi sifuna ukugwema i-anisotropy, kodwa kungani singayisebenzisi?).Kulungelo lobunikazi lase-US elibizwa ngokuthi "anisotropiccordierite molonlish", i-Lachman im nabanye basebenzisa ngokugcwele ukushelela nokugingqika kwe-kaolin egqagqene ukuze ijwayele ukuma kwendiza.Ngemuva kokudubula, ukuhlelwa kokuma kwezinhlamvu ze-cordierite esakhiweni sezinyosi kungenziwa.I-oriented cordierite ine-anisotropy ekwandiseni okushisayo, ngakho-ke ingafinyelela ku-coefficient ephansi yokwandisa okushisayo (i-coefficient yokugcina yokwandisa okushisayo ingu-0.55 kuphela) × 10-6/℃).

Njengamanje, ubuchwepheshe obuyisisekelo bokukhiqizwa kwezinsimbi zoju lwe-cordierite ezisezingeni eliphezulu zisasebenza kahle yizinkampani ezimelwe yi-Corning yase-United States kanye ne-NGK yaseJapane.Kodwa-ke, ngokukhula okuqhubekayo kwemakethe ethwala izinsiza zezimoto kanye nokukhula okuqhubekayo kwamandla okucwaninga asekhaya, ukushintshwa kwasekhaya kokuvela kwamanye amazwe kuba ngokoqobo.

Okokugcina, kufanele ukubalula ukuthi muva nje, i-Shanghai imemezele ukuthi izinga "eliyisithupha likazwelonke" lizosetshenziswa kusukela ngoJulayi 1 kulo nyaka.Uma kuqhathaniswa namazinga amahlanu kazwelonke, amazinga ayisithupha kazwelonke aqinile kakhulu esewonke, ikakhulukazi ahlanganisa:

(1) Ukukhishwa kwe-Carbon monoxide ezimotweni zikaphethiloli kwehle ngo-50%

(2) Umkhawulo wokukhishwa kwengqikithi yama-hydrocarbon nama-non-methane esewonke ama-hydrocarbon ehle ngo-50% (23% ukusuka ezweni IV ukuya ezweni V)

(3) Umkhawulo wokukhishwa kwe-NOx uqiniswe ngama-42% (wehliswe ngo-28% ukusuka ezweni IV ukuya ezweni V)

Ngokukhula okusheshayo kwemakethe yezimoto yasekhaya kanye nokuthuthuka okuqhubekayo kwamazinga okukhishwa kwegesi, kunesidingo esikhulu semakethe sezinsimbi zoju lwe-cordierite zokuhlanza igesi ephumayo.Kukholakala ukuthi i-honeycomb Ceramics yasekhaya ye-cordierite yezimoto ingaba nentuthuko engcono esikhathini esizayo.

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