1. Tete'e a'e
FGD nozzlesfa'agaoioi i si'osi'omaga sili ona pala e iai sulfur oxides, chlorides, ma isi vaila'au malosi. Silicon carbide (SiC) ceramic e faʻaalia ai le faʻalavelave faʻaleagaina ma le itiiti ifo i le 0.1% le gau i le pH 1-14 fofo (i suʻega ASTM C863). Pe a fa'atusatusa i u'amea u'amea (PREN 18-25) ma u'amea nickel (PREN 30-40), e fa'atumauina e le SiC le sa'o lelei o le fausaga e aunoa ma le pitting po'o le fa'amamafaina ole ta'e a'e e o'o lava ile ga'o fa'atumauina ile vevela maualuga.
2. Mausali-maualuga Maualuluga
O le vevela o le fa'agaoioiga i faiga fa'amama kasa susū e masani ona va'aia le 60-80°C ma fa'a'ai e sili atu i le 120°C. SiC ceramic taofi 85% o lona potu-vevela malosi i le 1400 ° C, outperforming alumina ceramics (maualalo 50% malosi i le 1000 ° C) ma uʻamea faʻafefe. O lona fa'avevelaina o le vevela (120 W/m·K) e mafai ai ona fa'amama lelei le vevela, puipuia ai le fa'atupuina o fa'amamafa.
3. La'ei Tetee
Faatasi ai ma le Vickers ma'a'a e 28 GPa ma gau gau o le 4.6 MPa·m¹/², SiC e fa'aalia ai le sili atu o le tete'e atu i le 'ele'ele (Mohs 5-7). Fa'ata'ita'iga fanua fa'aalia SiC nozzles tausia <5% ofuina pe a uma le 20,000 auaunaga itula, fa'atusatusa i le 30-40% ofuina i alumina nozzles ma le atoatoa le manuia o polymer-coated metals i totonu ole 8,000 itula.
4. Uiga tafe
O le mea e le susu o le SiC faʻapipiʻi faʻafesoʻotaʻi (contact angle>100°) e mafai ai ona faʻasalalau saʻo slurry faʻatasi ai ma tau CV <5%. O lona ultra-smooth surface (Ra 0.2-0.4μm) e faʻaitiitia ai le mamafa o le pa'ū e 15-20% pe a faʻatusatusa i nozzles uʻamea, aʻo faʻatumauina faʻamautu faʻasalaga faʻamau (± 1%) i luga o le gaioiga umi.
5. Tausiga Faigofie
SiC's chemical inertness fa'atagaina auala fa'amama fa'amalosi e aofia ai:
- Va'a vai maualuga (e o'o i le 250 pa)
- Fa'amamaina ole Ultrasonic ile vaifofo alkaline
- Fa'amama le ausa ile 150°C
E aunoa ma se tulaga lamatia o le fa'aleagaina o luga e masani ona fa'apipi'iina i pulu u'amea fa'apipi'i.
6. Ta'amilosaga o le Tamaoaiga
E ui o le tau muamua mo SiC nozzles e 2-3 × maualuga atu nai lo tulaga 316L u'amea u'amea, o latou 8-10 tausaga auaunaga ola (vs 2-3 tausaga mo metals) fa'aitiitia le toe sui e 70%. Aofa'i tau o le umiaina o lo'o fa'aalia ai le 40-60% fa'apolopolo i luga o le 10 tausaga, ma leai se taimi malolo mo le toe faaleleia i totonu.
7. Fesoasoani Siosiomaga
SiC o loʻo faʻaalia le le mafaatusalia faʻatinoga i tulaga ogaoga:
- Tete'e masima: 0% suiga tele pe a uma le 5000hr su'ega ASTM B117
- Gaioiina o le sau o le sua: Tatalia 160°C H2SO4 ausa
- Tete'e te'i vevela: Sao ola 1000°C→25°C taamilosaga tineia
8. Meatotino Anti-scaling
O le covalent atomic structure o le SiC e fausia ai se mea e le fa'afefeteina ma fua fa'atatau 80% maualalo nai lo isi u'amea. O suʻesuʻega faʻataʻitaʻi e faʻaalia ai o le calcite ma le gypsum teuga e fausia ai sootaga vaivai (faʻapipiʻi <1 MPa) i luga o le SiC versus> 5 MPa i luga o metala, e faigofie ai ona aveese masini.
Fa'ai'uga fa'apitoa
Silicon carbide ceramic o loʻo faʻaalia e avea ma mea sili ona lelei filifiliga mo FGD nozzles e ala i iloiloga atoatoa o faʻatinoga:
- 10x umi le soifua tautua nai lo isi u'amea
- 92% faʻaitiitiga i le tausiga e leʻi fuafuaina
- 35% le fa'aleleia atili o le fa'aogaina o le SO2 e ala i faiga fa'apipi'i faifaipea
- Tausi atoatoa ile EPA 40 CFR Vaega 63 tulaga fa'aoso
Faatasi ai ma le alualu i luma o faiga gaosiga e pei o le vai-vaega sintering ma le CVD coating, o loʻo sosoʻo auga tupulaga SiC nozzles o loʻo ausia i lalo-micron faʻamaeʻaina ma geometries lavelave muamua e le mafai ona maua i ceramics. O lenei fa'atekonolosi fa'aleleia o lo'o fa'atulagaina le silicon carbide e avea ma mea e filifilia mo le isi augatupulaga fa'amama kasa fa'amama.
Taimi meli: Mati-20-2025