| 탄화규소 캔들형 필터의 제조 및 고온고압 하에서의 성능평가 |
| 이상훈, 이승원, 이기성1, 한인섭1, 서두원1, 박석주1, 박영옥1, 우상국1 |
충남대학교 금속공학과
1한국에너지기술연구원 |
| Fabrication of Silicon Carbide Candle Filter and Performance Evaluation at High Temperature and Pressure |
| Sang-Hun Lee, Seung-Won Lee, Kee-Sung Lee1, In-Sub Han1, Doo-Won Seo1, Seok-Joo Park1, Young-Ok Park1, Sang-Kuk Woo1 |
Department of Metallurgical Engineering, Chungnam National University
1Korea Institute of Energy Research |
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| ABSTRACT |
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Silicon carbide candle filters for the pressurized fluidized bed combustion system were fabricated by extrusion process. Carbon black was added to control the porosity. Inorganic additives such as clay and calcium carbonate were added to exhibit appropriate strength. Silicon carbide layer with a finer pore size (mean pore diameter ~$10{mu}m$) was coated on the silicon carbide support layer (mean pore diameter ~$47{mu}m$, porosity ∼40%). After that, the filter was sintered at 1400${circ}C$ in air. We evaluated the filtration performances of the filter at 500${circ}C$ and $5kgf/cm^2$ of pressure. As a result, high separation efficiency, >99.999% was measured. It is expected that silicon carbide candle filter can be successfully used for the pressurized fluidized bed combustion system. |
| Key words:
Pressurized fluidized bed combustion, Silicon carbide, Hot gas filter, Candle typed filter, Extrusion, Separation efficiency |
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