화학공학소재연구정보센터
HWAHAK KONGHAK, Vol.35, No.6, 863-869, December, 1997
탄화실 부착카본의 생성 및 연소특성
Combustion Characteristics and Growth of Carbon Deposited on the Coke Oven Wall
초록
석탄을 건류시 탄화실에 부착되는 카본의 생성 메카니즘을 규명하고 생성량 예측과 연소특성에 관한 실험을 하였다. 탄화실내의 여러 위치에서 채취한 카본 분석을 통해 미분탄과 타르 증기가 응축되어 핵을 생성하고 열분해에 의해 핵이 성장되어 카본이 형성됨을 알 수 있었다. 소형 실험로에서 카본부착표면의 온도와 석탄의 수분변화에 따라 부착되는 카본의 양을 측정하여 카본부착속도식을 유도하였다. K2CO3 촉매를 이용한 부착카본의 연소실험결과 최적 촉매 loading 양은 6.0wt%이었고 무촉매에 의한 연소보다 연소속도가 1.4배 증가하였다. 1회에 석탄 약 33톤을 건류하는 실제 코크스 공정에서 탄화실에 부착되는 카본의 양은 4.56㎏으로 추정되었으며 연소에 필요한 공기를 공급하는 fan의 용량은 70Nm3/min 이상이어야 했다.
The purpose of this study were to understand the growth of carbon and a combustion characteristics and to estimate the carbon quantity deposited on the coke oven wall. The growth mechanism of deposited carbon sampled in the different positions of coking chamber was examined. A pulverized coal and tar vapor were condensed to form a nuclei test produced then it was grown by pyrolysis, resulting in forming a carbon. The deposition test was carried out in a small carbonization oven in order to predict the deposition rate of carbon. The deposition rate of carbon was strongly dependent on the carbonization temperature and the moisture content of coal. By means of catalytic combustion, which used K2CO3, the optimum loading quantity was 6.0 wt% and catalytic combustion rates were increased more two times than noncatalytic combustion rates. It was assumed that the carbon deposition in coke oven wall carbonizing about 33 ton of coal was 4.56kg and the capacity of fan supplying air for combustion was over 70Nm3/min.
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