1. Ukumelana Nokugqwala
Ama-nozzle we-FGDisebenza ezindaweni ezigqwalile kakhulu eziqukethe ama-sulphur oxides, ama-chloride, namanye amakhemikhali anolaka. I-Silicon carbide (SiC) ceramic ibonisa ukumelana nokugqwala okukhethekile ngokulahleka kwesisindo esingaphansi kuka-0.1% kuzixazululo ze-pH 1-14 (ngokuhlola ngakunye kwe-ASTM C863). Uma kuqhathaniswa nensimbi engagqwali (PREN 18-25) kanye nama-nickel alloys (PREN 30-40), i-SiC igcina ubuqotho besakhiwo ngaphandle kwe-pitting noma i-stress corrosion cracking ngisho nama-asidi agxilile emazingeni okushisa aphakeme.
2. High-Temperature Ukuzinza
Amazinga okushisa asebenzayo ezinhlelweni zokususa igesi ye-flue desulfurization ngokuvamile asukela ku-60-80°C nama-spikes angaphezu kuka-120°C. I-ceramic ye-SiC igcina u-85% wamandla ayo ezinga lokushisa kwegumbi ku-1400°C, izitsha zobumba ze-alumina ezisebenza kahle kakhulu (ukulahlekelwa amandla angu-50% ngo-1000°C) nezinsimbi ezikwazi ukumelana nokushisa. I-thermal conductivity (120 W/m·K) yenza kube lula ukulahlwa kokushisa, kuvimbele ukunqwabelana kokucindezeleka okushisayo.
3. Gqoka Ukumelana
Ngokuqina kwe-Vickers okungu-28 GPa kanye nokuqina kokuphuka okungu-4.6 MPa·m¹/², i-SiC ibonisa ukumelana nokuguguleka okuphakeme ngokumelene nezinhlayiya zomlotha wezimpukane (Mohs 5-7). Ukuhlolwa kwenkundla kukhombisa ukuthi imibhobho ye-SiC igcina ukuguga okungu-<5% ngemva kwamahora esevisi angu-20,000, uma kuqhathaniswa nokugqokwa okungu-30-40% kumabhomu e-alumina kanye nokwehluleka okuphelele kwezinsimbi ezimbozwe nge-polymer phakathi namahora angu-8,000.
4. Izimpawu zokugeleza
Indawo engamanzisi ye-React-bonded SiC (i-engeli yokuxhumana >100°) inika amandla ukuhlakazeka okunembayo okudaka ngamavelu e-CV <5%. I-ultra-smooth surface (Ra 0.2-0.4μm) yehlisa ukwehla kwengcindezi ngo-15-20% uma kuqhathaniswa namabhomu ensimbi, kuyilapho igcina ama-coefficients okukhipha azinzile (±1%) ekusebenzeni kwesikhathi eside.
5. Ukugcina Kulula
I-inertness yamakhemikhali ye-SiC ivumela izindlela zokuhlanza ezinolaka ezihlanganisa:
- Ijet yamanzi enengcindezi ephezulu (kufika ku-250 bar)
- Ukuhlanza kwe-Ultrasonic ngezixazululo ze-alkaline
- Ukukhipha inzalo ku-steam ku-150°C
Ngaphandle kwengozi yokuwohloka kwendawo okuvamile kumabhomu ensimbi ane-polymer-lined noma camera.
6. I-Lifecycle Economics
Nakuba izindleko zokuqala ze-SiC nozzles ziphakeme ngo-2-3× kune-standard stainless steel engu-316L, impilo yazo yesevisi yeminyaka engu-8-10 (vs 2-3 iminyaka yezinsimbi) inciphisa imvamisa yokushintshwa ngo-70%. Izindleko zobunikazi eziphelele zibonisa ukonga okungama-40-60% enkathini yeminyaka eyi-10, ngaphandle kwesikhathi sokuphumula esingekho sokulungiswa kwe-in-situ.
7. Ukuhambisana Kwemvelo
I-SiC ibonisa ukusebenza okungenakuqhathaniswa ezimweni ezimbi kakhulu:
- Ukumelana nesifutho sikasawoti: 0% ushintsho lwesisindo ngemuva kokuhlolwa kwe-ASTM B117 okungu-5000hr
- Ukusebenza kwendawo yamazolo e-Acid: Imelana nemimoya engu-160°C H2SO4
- Ukumelana nokushaqeka okushisayo: Isinda ku-1000°C→25°C imijikelezo yokucisha
8. Izakhiwo zokulwa nokukala
Isakhiwo se-athomu esihlangene se-SiC sidala indawo engasasebenzi ngezinga lokukala ngama-80% aphansi kunezinye izindlela zensimbi. Ucwaningo lwe-Crystallographic lwembula ukuthi i-calcite ne-gypsum deposits yenza amabhondi abuthakathaka (ukunamathela <1 MPa) ku-SiC ngokumelene > ne-5 MPa ezinsimbi, okwenza kube lula ukususwa komshini.
Isiphetho Sezobuchwepheshe
I-Silicon carbide ceramic ivela njengokukhetha okuhle kwempahla yamabhomu e-FGD ngokuhlolwa okuphelele kokusebenza:
- Impilo yesevisi engu-10× ende kunezinye izindlela zensimbi
- Ukwehliswa okungama-92% kwesondlo esingahlelelwe
- Ukuthuthukiswa okungama-35% ekusebenzeni kahle kokususa kwe-SO2 ngokusebenzisa amaphethini okufutha angaguquki
- Ukuthobela ngokugcwele izindinganiso zokukhishwa kwe-EPA 40 CFR Ingxenye 63
Ngamasu okukhiqiza athuthukayo afana ne-liquid-sintering kanye ne-CVD coating, imilomo ye-SiC yesizukulwane esilandelayo ifinyelela ukuqedwa kwe-sub-micron surface kanye namajiyometri ayinkimbinkimbi ayengatholakali ngaphambilini kuma-ceramics. Lokhu kuguquguquka kwezobuchwepheshe kubeka i-silicon carbide njengento ekhethwayo yezinhlelo zokuhlanza igesi ye-flue yesizukulwane esilandelayo.
Isikhathi sokuthumela: Mar-20-2025