분사된 미분탄의 편중분포 방지를 위한 내부장치 최적화에 관한 수치 해석적 연구 ( A Numerical Study for Optimum Configuration of Pulverized Coal Nozzle to Prevent Uneven Distribution of Particle )

Recently, according to increase in the requirement of electric power, a thermoelectric power plant equipped with pulverized coal combustion system is highly valued, because coal has abundant deposits and a low price compared with others. For efficient use of coal fuel, most of plant makers are study...

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Published inTaehan Kigye Hakhoe nonmunjip. B Vol. 24; no. 2; pp. 270 - 279
Main Authors 김혁제, 송시홍, 박석호
Format Journal Article
LanguageKorean
Published 대한기계학회 2000
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Summary:Recently, according to increase in the requirement of electric power, a thermoelectric power plant equipped with pulverized coal combustion system is highly valued, because coal has abundant deposits and a low price compared with others. For efficient use of coal fuel, most of plant makers are studying to improve combustion performance and flame stability, and reduce pollutants emission. One of these studies is how to control the profile of particle injection and velocity dependant on coal nozzle configuration. Basically, nozzle which has mixed flow of gas and particle is required to have the balanced coal concentration at exit, but it is very difficult to obtain that by itself without help of other device. In this study, coal distribution and pressure drop in gas-solid flow are calculated by numerical method in nozzle with various shapes of venturi diffuser as a means to get even coal particle distribution. The tentative correlations of pressure drop and exit coal distribution are deduced as function of the height, length and reducing angle of venturi from the calculated results. When coal hurner nozzle is designed, these equations are very useful to optimize the shape of venturi which minimize uneven particle distribution and pressure drop within coal nozzle.
Bibliography:KISTI1.1003/JNL.JAKO200027542985607
ISSN:1226-4881
2288-5234