1. Juriya na Lalata
Farashin FGDsuna aiki a cikin wurare masu lalata da yawa waɗanda ke ɗauke da sulfur oxides, chlorides, da sauran sinadarai masu haɗari. Silicon carbide (SiC) yumbu yana nuna juriya na musamman na lalata tare da kasa da 0.1% asarar taro a cikin hanyoyin pH 1-14 (a kowane gwajin ASTM C863). Idan aka kwatanta da bakin karfe (PREN 18-25) da nickel alloys (PREN 30-40), SiC tana kiyaye mutuncin tsarin ba tare da fashewar lalata ko damuwa ba ko da a cikin ma'aunin acid a yanayin zafi.
2. Tsabtace Tsawon Zazzabi
Yanayin aiki a cikin tsarin lalata bututun hayaki yana yawanci kewayo 60-80 ° C tare da spikes sama da 120 ° C. SiC yumbura yana riƙe da 85% na ƙarfin ɗaki-zazzabi a 1400°C, yana fin ƙarfin yumbu alumina (rasa 50% ƙarfi ta 1000°C) da ƙarfe masu jure zafi. Matsayinsa na thermal (120 W / m · K) yana ba da damar haɓakar zafi mai inganci, yana hana haɓakar damuwa na thermal.
3. Sanya Resistance
Tare da taurin Vickers na 28 GPa da raunin karaya na 4.6 MPa·m¹/², SiC yana nuna juriya mafi girma akan barbashi ash (Mohs 5-7). Gwaje-gwajen filin suna nuna nozzles na SiC suna kula da <5% lalacewa bayan sa'o'in sabis na 20,000, idan aka kwatanta da 30-40% lalacewa a cikin nozzles na alumina da cikakkiyar gazawar ƙarfe mai rufin polymer a cikin sa'o'i 8,000.
4. Halayen kwarara
Wurin da ba a jika ba na SiC mai ɗaurin amsawa (kwanciyar lamba>100°) yana ba da damar rarrabuwar kai daidai tare da ƙimar CV <5%. Its matsananci-smooth surface (Ra 0.2-0.4μm) rage matsa lamba drop by 15-20% idan aka kwatanta da karfe nozzles, yayin da rike barga fitarwa coefficients (± 1%) a kan dogon lokaci aiki.
5. Sauƙin Kulawa
Rashin rashin aikin sinadarai na SiC yana ba da damar tsaftataccen hanyoyin tsaftacewa gami da:
- Jirgin ruwa mai ƙarfi (har zuwa mashaya 250)
- Ultrasonic tsaftacewa tare da alkaline mafita
- Haifuwar tururi a 150 ° C
Ba tare da haɗarin lalacewa na kowa ba a cikin bututun ƙarfe mai lulluɓe ko mai rufi.
6. Tattalin Arzikin Rayuwa
Duk da yake farashin farko na SiC nozzles sun kasance 2-3 × sama da daidaitaccen bakin karfe na 316L, rayuwar sabis ɗin su na shekaru 8-10 (vs 2-3 shekaru don karafa) yana rage mitar sauyawa ta 70%. Jimlar kuɗin mallakar mallakar yana nuna tanadin 40-60% sama da shekaru 10, tare da raguwar lokacin gyare-gyare a cikin gida.
7. Daidaituwar Muhalli
SiC yana nuna aiki mara misaltuwa a cikin matsanancin yanayi:
- Juriya fesa gishiri: 0% canjin taro bayan gwajin 5000hr ASTM B117
- Aikin raɓa na acid: Yana jurewa 160 ° C H2SO4 tururi
- Juriyar girgiza zafin zafi: Ya tsira 1000 ° C → 25 ° C zagayowar kashewa
8. Anti-scaling Properties
Tsarin atomic covalent na SiC yana haifar da ƙasa mara amsawa tare da ƙimar ƙima 80% ƙasa da madadin ƙarfe. Binciken Crystallographic ya nuna cewa ma'ajin ƙididdiga da gypsum suna samar da alaƙa masu rauni (manne <1 MPa) akan SiC da> 5 MPa akan karafa, yana ba da sauƙin cire injin.
Ƙarshen Fasaha
Silicon carbide yumbura yana fitowa azaman mafi kyawun zaɓi na kayan don nozzles na FGD ta hanyar ingantaccen kimanta aikin:
- 10 × tsawon rayuwar sabis fiye da madadin ƙarfe
- 92% raguwa a cikin kulawa mara kyau
- 35% haɓakawa a cikin ingantaccen cirewar SO2 ta daidaitaccen tsarin fesa
- Cikakken yarda da EPA 40 CFR Sashe na 63 ka'idojin fitar da hayaki
Tare da haɓaka dabarun masana'antu kamar sintirin ruwa-lokaci da kuma suturar CVD, SiC nozzles na gaba-gaba suna cimma ƙarshen saman-micron da hadaddun geometries waɗanda ba a iya samun su a baya a cikin yumbu. Wannan juyin halittar fasaha yana sanya silicon carbide a matsayin kayan da aka zaɓa don tsarin tsabtace bututun hayaƙi na gaba.
Lokacin aikawa: Maris 20-2025