Prediction of the minimum load of operation and minimum coal quality with stable combustion for utility pulverized-coal-fired boilers
MLO, the Minimum Load of Operation with stable combustion not supported by firing oil, and MCQ, the Minimum Coal Quality, which gives the lowest heat values of coals with different volatile matter contents, are defined on the basis of CSI, a combustion stability index. In order to predict MLO and MCQ, the simple, chemical reaction system model has been modified by means of the concept of lean flammability of gases. A three-dimensional combustion simulation code integrated with the modified model was used to study the combustion process in a 200MW pulverized coal fired utility boiler. The results showed that as the content of volatile matter increases, the value of CSI under different load levels increases accordingly, and the MLO becomes lower. The prediction of MCQ agreed also well with operational experiences. Much work should be done before the method proposed in this paper can be applied into practice.
- Research Organization:
- Huazhong Univ. of Science and Technology, Wuhan (CN)
- Sponsoring Organization:
- National Natural Science Foundation of China (NNSFC)
- OSTI ID:
- 20006867
- Resource Relation:
- Conference: 1999 International Joint Power Generation Conference, Burlingame, CA (US), 07/25/1999--07/28/1999; Other Information: PBD: 1999; Related Information: In: Proceedings of the 1999 international joint power generation conference (FACT-vol. 23). Volume 1: Fuels and combustion technologies; Gas turbines; and Nuclear engineering, by Penfield, S.R. Jr.; Moussa, N.A. [eds.], 651 pages.
- Country of Publication:
- United States
- Language:
- English
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