1. Iska caabinta daxalka
FGD nasiyoKa hawlgala meelo aad u daxalaysa oo ay ku jiraan sulfur oxides, chlorides, iyo kiimikooyin kale oo dagaal leh. Silicon carbide (SiC) dhoobada waxay muujineysaa iska caabbinta daxalka gaarka ah oo leh wax ka yar 0.1% khasaaraha ballaaran ee pH 1-14 xal (halkiiba tijaabada ASTM C863). Marka la barbar dhigo birta daxalka ah (PREN 18-25) iyo nikkel alloys (PREN 30-40), SiC waxay ilaalisaa daacadnimada qaabdhismeedka iyada oo aan la daadin ama diiqadu dillaacin xitaa asiidhyada xoogga leh ee heerkulka sare leh.
2. Xasilooni heerkul sare ah
Heerkulka shaqada ee nidaamyada desulfurization gaaska qoyan wuxuu caadi ahaan u dhexeeyaa 60-80 ° C oo leh heerkul ka sarreeya 120 ° C. dhoobada SiC waxay haysaa 85% xooga kulaylka qolka 1400°C, iyada oo ka saraysa ceramics alumina (lumina 50% xoog 1000°C) iyo biraha kulaylka u adkaysta. Heerkeeda kulaylka (120 W/m · K) waxay awood u siinaysaa kala daadinta kulaylka wax ku ool ah, ka hortagga cadaadiska kulaylka.
3. Xiro iska caabin
Iyada oo adkaanta Vickers ee 28 GPa iyo jabka adag ee 4.6 MPa·m¹/², SiC waxay muujisaa iska caabbinta nabaad guurka ee ka soo horjeeda walxaha dambaska duqsiga (Mohs 5-7). Tijaabooyinku waxay muujinayaan nozzles SiC inay ilaaliso <5% xidhashada ka dib saacadaha adeegga 20,000, marka la barbar dhigo 30-40% xidhashada alumina nozzles iyo fashilka dhammaystiran ee biraha-polymer-dahaarka gudahooda 8,000 saacadood gudahood.
4. Tilmaamaha socodka
Dusha aan qoyanayn ee SiC-ku-xidhan fal-celinta (xagalka xidhiidhka>100°) waxa uu sahlayaa firidhsan sax ah oo leh qiyamka CV <5%. Dusha sare ee aadka u jilicsan (Ra 0.2-0.4μm) waxay yaraynaysaa hoos u dhaca cadaadiska 15-20% marka loo eego biraha birta ah, iyadoo la ilaalinayo isku-dheellitirka dareeraha (± 1%) ee hawlgalka muddada dheer.
5. Fududeynta dayactirka
Jidh la'aanta kiimikada ee SiC waxay ogolaataa hababka nadiifinta gardarrada ah oo ay ku jiraan:
- Jet-biyoodka cadaadiska sarreeya (ilaa 250 bar)
- Nadiifinta Ultrasonic oo leh xalalka alkaline
- Nadiifinta uumiga heerkulka 150°C
Iyada oo aan lahayn khatar nabaad-guur ah oo dusha sare ah oo caan ku ah biro-dahaaran ama dahaarka birta.
6. Dhaqaalaha meertada nolosha
In kasta oo kharashyada bilowga ah ee nozzles-ka SiC ay 2-3 × ka sarreeyaan heerka caadiga ah ee 316L birta-la'aanta ah, noloshooda adeegga 8-10 sano (la 2-3 sano ee biraha) waxay yaraynaysaa inta jeer ee beddelka 70%. Wadarta kharashyada lahaanshaha waxay muujinayaan 40-60% kaydinta muddo 10 sano ah, iyadoo eber la dhimayo dayactirka goobta.
7. Waafaqsanaanta deegaanka
SiC waxay muujisaa waxqabad aan la mid ahayn xaaladaha ba'an:
- Iska caabin buufin milix ah: 0% isbeddel ballaaran ka dib 5000hr ASTM B117 tijaabinta
- Hawlgalka barta sayaxa: Waxay u adkaysataa uumiga 160 ° C H2SO4
- Iska caabbinta shoogga kulaylka: Wuxuu badbaadiyaa 1000°C→25°C wareegyada deminta
8. Guryaha-iska-caabbinta
Qaab dhismeedka atomiga wada jirka ah ee SiC waxa uu abuuraa sag aan falcelin lahayn oo leh heerar miisaankeedu yahay 80% ka hooseeya kuwa birta ah. Daraasadaha Crystallographic waxay muujinayaan in kaydka calcite iyo gypsum ay sameeyaan curaarta daciifka ah (adhesion <1 MPa) ee SiC ka soo horjeeda> 5 MPa biraha, taas oo u sahlaysa saarista si fudud.
Gabagabo Farsamo
Silicon carbide ceramic wuxuu u soo baxaa sida doorashada shay ugu wanaagsan ee FGD nozzles iyada oo loo marayo qiimeyn waxqabad oo dhammaystiran:
- 10 × cimri dheer oo adeeg ah oo ka badan beddelka macdan
- 92% dhimista dayactirka aan qorshaysnayn
- 35% horumarinta hufnaanta ka saarista SO2 iyada oo loo marayo hababka buufinta joogtada ah
- U hoggaansanaanta buuxda ee EPA 40 CFR Qaybta 63 heerarka qiiqa hawada
Iyada oo la horumarinayo farsamooyinka wax soo saarka sida dareeraha-wejiga dareeraha ah iyo daahan CVD, jiilka soo socda ee SiC nozzles ayaa gaadhaya dhamaystirka dusha sare ee micron-ka iyo joomatariyada adag ee aan hore loogu heli karin dhoobada. Horumarka tignoolajiyadan wuxuu dhigayaa silikoon carbide sida shayga doorashada ee nidaamyada nadiifinta gaaska flue jiilka soo socda.
Waqtiga boostada: Mar-20-2025