| Issue |
HWAHAK KONGHAK,
Vol.39, No.5, 557-562, 2001
Vol.39, No.5, 557-562, 2001
가압유동층 연소로에서 무연탄의 연소특성
Combustion Characteristics of Domestic Anthracite Coal in a Pressurized Fluidized Bed Combustor
연소로의 층(bed)하부 직경이 0.17m, 높이가 2m이고, freeboard의 직경이 0.25m, 높이가 3m인 tapered bed 형태의 가압유동층 연소로에서 58.25%의 탄소와 0.34%의 황을 포함하고 있는 강원도 태백지역 무연탄의 연소 및 배가스 특성에 대해 연구하였다. 연소로의 압력은 6기압, 층 높이는 2m로 일정하게 유지한 상태에서, 연소 온도는 850-950℃범위에서 실험하였다. 또 공기의 유동화속도를 0.9-1.3m/s로 변화시키고, 과잉공기율 10-30% 범위로 실험하였다. 실험결과는 연소온도가 850℃에서 950℃로 증가함에 따라 연소효율은 93%에서 99.5%로 증가하였으며, NOx는 33-55 ppm으로 배출되었다. 또 N2O 17 ppm이하의 값을 얻었다. SO2의 배출농도는 850℃에서 950℃로 층온도가 증가함에 따라 증가하였다.
The combustion and emissions characteristics of the domestic anthracite coal containing 58.25% carbon and 0.34% sulfur was investigated in pressurized fluidized bed combustor(PFBC), 0.17 m bed I.D.×2 m height tapered bed and 0.25 m I.D.×3 m height freeboard. The pressure of the combustor was constantly maintained at 6 atm, and the combustion temperatures are varied from 850 ℃ to 950 ℃. Also the air velocity was changed from 0.9 to 1.3 m/s. Consequently, combustion efficiency and NOx concentration in the flue gas with increasing combustion temperature from 850 ℃ to 950 ℃ were increased in the ranges 93-99.5% and 33-70 ppm respectively. But N2O concentration is obtained less then 20 ppm. SO2 concentration increasing bed temperature from 850 ℃ to 950 ℃ in the flue gas was increased.
Keywords:
Pressurized Fluidized Bed Combustor; Emission Characteristics; Domestic Anthracite; Coal Combustion
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[Cited By]
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