유동층 연소로에서 국내탄 회재의 마모 특성

이시훈; 김상돈; 김재성; 이종민; See Hoon Lee; Sang Done Kim; Jae Sung Kim; Jong Min Lee

Journal of the Korean Industrial and Engineering Chemistry, Vol.17, No.5, 547-551, October, 2006

Export Citation

유동층 연소로에서 국내탄 회재의 마모 특성

Attrition Characteristics of Korean Antracite Ash in Fluidized Bed Combustors

이시훈 , 김상돈 ¹, 김재성 ², 이종민 ^{2, †}

한국에너지기술연구원 석탄전환연구센터
¹한국과학기술원 생명화학공학과
²한전 전력연구원 수화력발전연구소

See Hoon Lee , Sang Done Kim¹, Jae Sung Kim², and Jong Min Lee^{2, †}

Korea Institute of Energy Research, Coal Conversion Research Center, Daejeon, Korea
¹Department of Biomolecular-chemical Engineering, KAIST, Daejeon, Korea
²Power Generation Lab., KEPRI, KEPCO, Daejeon, Korea

E-mail:

초록

ASTM D5757-95에 따른 입자 마모 측정기와 lab-scale 유동층 연소로에서 국내 무연탄 회재와 모래의 입자 마모 특성을 실험하였다. 기체유속에 따른 마모 특성으로 비산 회재의 입도 분포, 마모 속도, 마모율 등을 측정하였다. 일반적으로 유동 층 층물질로 사용되는 모래보다 회재가 마모에 취약해 비산 회재의 발생이 높았으며 마모지수의 경우 5배 정도 높게 나타났다. 기체 유속 변화에 따라 입자의 마모에 의해 미세 입자의 생성이 지속적으로 발생하였으며 다음과 같은 식을 따른다. dW/dt=-3.18X10^-7(U-Umf)W

In the reactor following the American standard test method (ASTM) D5757-95 and lab-scale fluidized bed combustor, the attrition characteristics of sand and ash of Korean anthracite were investigated. The attrition characteristics, such as particle size distribution of fly ash, attrition rate, and attrition ratio etc, were studied with variation of gas velocities. The particle attrition of ash was more active than sand which was generally used as a fluidized material and also the attrition index of ash taken by ASTM D5757-95 was 5 times higher than that of sand. The formation of fine particles continuously occurred due to particle attrition with increasing gas velocities. The following equation has been suggested for attrition rate of ash. dW/dt=-3.18X10^-7(U-Umf)W

Keywords:attrition;ash;fluidized bed;combustor

[References]

Lee SH, Lee JM, Kim JS, Chol JH, Kim SD, HWAHAK KONGHAK, 38(4), 516 (2000)
Merrick D, Highley J, AIChE Symp. series, 70, 366 (1974)
Park YS, Son JE, HWAHAK KONGHAK, 28(3), 320 (1990)
Jang HT, Cha WS, Oh KJ, Doh DS, JKSEE, 16, 525 (1994)
Lin L, Wen CY, Powder Technol., 27, 105 (1980)
Ray YC, Jiang TS, Wen CY, Powder Technol., 49, 193 (1987)
Donsi G, Massimilla L, Miccio M, Combustion and Flame, 41, 57 (1981)
Vaux WG, Fellers AW, AIChE Symp. Series, 205, 1113 (1981)
Waldie B, Robinson T, Powder Technol., 27, 163 (1980)
Choi YS, Moon BS, No SY, Lee GH, 3rd Inter. Symp. Coal Combustion, Beijing, China, 107 (1995)
Arena U, D’amore M, Massimilla L, AIChE, 29, 40 (1983)

[Referenced By]

[Related Articles]

[1] Lee SH, Lee JM, Kim JS, Chol JH, Kim SD, HWAHAK KONGHAK, 38(4), 516 (2000)

[2] Merrick D, Highley J, AIChE Symp. series, 70, 366 (1974)

[3] Park YS, Son JE, HWAHAK KONGHAK, 28(3), 320 (1990)

[4] Jang HT, Cha WS, Oh KJ, Doh DS, JKSEE, 16, 525 (1994)

[5] Lin L, Wen CY, Powder Technol., 27, 105 (1980)

[6] Ray YC, Jiang TS, Wen CY, Powder Technol., 49, 193 (1987)

[7] Donsi G, Massimilla L, Miccio M, Combustion and Flame, 41, 57 (1981)

[8] Vaux WG, Fellers AW, AIChE Symp. Series, 205, 1113 (1981)

[9] Waldie B, Robinson T, Powder Technol., 27, 163 (1980)

[10] Choi YS, Moon BS, No SY, Lee GH, 3rd Inter. Symp. Coal Combustion, Beijing, China, 107 (1995)

[11] Arena U, D’amore M, Massimilla L, AIChE, 29, 40 (1983)