1. Ātete ki te Waikura
Ngā pūwero FGDKa mahi i roto i ngā taiao tino waikura kei roto ngā waikura whanariki, ngā pūhaumāota, me ētahi atu matū kaha. He tino ātete te uku silicon carbide (SiC) ki te waikura me te iti iho i te 0.1% te ngaronga papatipu i roto i ngā otinga pH 1-14 (e ai ki te whakamātautau ASTM C863). Ki te whakatauritea ki te maitai kore waikura (PREN 18-25) me ngā koranu nikara (PREN 30-40), ka mau tonu te hanganga o te SiC me te kore e pakaru, e pakaru rānei te waikura ahakoa i roto i ngā waikawa kukū i ngā pāmahana teitei.
2. Te Pūmautanga o te Pāmahana Teitei
Ko te pāmahana whakahaere i roto i ngā pūnaha whakakorenga hau paru maku i te nuinga o te wā kei waenganui i te 60-80°C me ngā titi e neke atu ana i te 120°C. Ka mau tonu te kaha o te uku SiC ki te 85% o tōna pāmahana rūma i te 1400°C, ka pai ake i ngā uku alumina (ka ngaro te kaha 50% mā te 1000°C) me ngā maitai ātete wera. Mā tōna kawe wera (120 W/m·K) ka taea te tuku wera pai, ka ārai i te hanga ahotea wera.
3. Ātete ki te Mau
Me te pakeke Vickers o te 28 GPa me te pakari pakaru o te 4.6 MPa·m¹/², he pai ake te ātete a te SiC ki te horo i ngā matūriki pungarehu rere (Mohs 5-7). E whakaatu ana ngā whakamātautau parae he iti iho i te 5% te pakaru o ngā pūwero SiC i muri i te 20,000 hāora ratonga, ki te whakaritea ki te 30-40% te pakaru i roto i ngā pūwero alumina me te pakaru katoa o ngā konganuku pania-polymer i roto i te 8,000 hāora.
4. Ngā Āhuatanga Rere
Mā te mata kore-mākū o te SiC honohono-tauhohenga (koki whakapā >100°) ka taea te horapa paru tika me ngā uara CV <5%. Mā tōna mata tino-maeneene (Ra 0.2-0.4μm) ka whakaitihia te hekenga pēhanga mā te 15-20% ki te whakaritea ki ngā pūwero whakarewa, me te pupuri tonu i ngā taunga tukunga pumau (±1%) i roto i te mahi roa.
5. Te Māmā o te Tiaki
Mā te koretake o te matū o SiC ka taea ngā tikanga horoi kaha tae atu ki:
- He pupuhi wai pēhanga teitei (tae atu ki te 250 pae)
- Te horoinga ultrasonic me ngā otinga kawakore
- Whakahoromata i te mamaoa i te 150°C
Kāore he mōrearea o te pirau o te mata, he mea noa i roto i ngā pūwero whakarewa kua whakakikoruatia ki te polymer, kua pania rānei.
6. Ōhanga Huringa Ora
Ahakoa he 2-3x teitei ake ngā utu tīmatanga mō ngā pūwero SiC i te maitai kore waikura 316L paerewa, ko te roa o te ora ratonga 8-10 tau (ki te 2-3 tau mō ngā konganuku) ka whakaiti i te auau whakakapinga mā te 70%. Ko te tapeke o ngā utu mana whakahaere e whakaatu ana i te 40-60% penapena i roto i ngā wā 10-tau, me te kore wā whakatā mō ngā whakatikatika ā-roto.
7. Hototahi ki te Taiao
E whakaatu ana a SiC i te mahi tino pai i roto i ngā āhuatanga tino kino:
- Ātete ki te rehu tote: 0% te panoni papatipu i muri i te whakamātautau ASTM B117 5000 hāora
- Te mahi i te ira tomairangi waikawa: Ka ātete ki te kohu H2SO4 160°C
- Ātete ki te ru wera: Ka ora i ngā huringa tinei 1000°C→25°C
8. Ngā Āhuatanga Ārai-tauine
Nā te hanganga ngota ngota o te SiC ka hangaia he mata kore-tauhohe me ngā tere tauine 80% te iti iho i ngā momo konganuku kē atu. E whakaatu ana ngā rangahau karaihe he ngoikore ake ngā hononga o ngā putunga konupūmā me te gypsum (piripiri <1 MPa) ki runga i te SiC, ki te whakataurite ki te >5 MPa ki runga i ngā konganuku, ā, ka māmā ake te tango ā-ringa.
Whakatau Hangarau
Ko te uku karawiti silicon te mea tino pai mō ngā pūwero FGD mā te aromatawai whānui i te mahi:
- 10x te roa o te ora ratonga i ngā momo konganuku kē atu
- Te whakaiti i te 92% o ngā mahi tiaki kore i whakaritea
- 35% te whakapainga o te pai o te tango SO2 mā roto i ngā tauira rehu auau
- Te tutuki katoa i ngā paerewa tukunga EPA 40 CFR Wāhanga 63
I te whanaketanga o ngā tikanga hangahanga pēnei i te sintering wai-wāhanga me te paninga CVD, kei te tutuki i ngā pūwero SiC o te whakatupuranga e whai ake nei ngā whakaotinga mata iti-micron me ngā āhuahanga uaua kāore i taea i mua i roto i ngā uku. Nā tēnei whanaketanga hangarau ka whakanohohia te silicon carbide hei rauemi whiriwhiri mō ngā pūnaha horoi hau paru o te whakatupuranga e whai ake nei.
Wā tuku: Maehe-20-2025