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Erschienen in:
2022 | OriginalPaper | Buchkapitel
80. Technical Measures in Design and Operation of the 1000 MW Supercritical Boiler Burning High-Slagging-Propensity Coal
verfasst von : Zhou Lyu, Qian Huang, Yuanping Yang, Shuiqing Li
Erschienen in: Clean Coal and Sustainable Energy
Verlag: Springer Singapore
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Abstract
Centralized coal utilization in large-scale units is still an indispensable part of the energy structure of many developing countries to maintain grid stability. This work is focused on the technical considerations on 1000 MW boiler design and operation for burning high-slagging propensity coals. The design and check coal samples are relatively low in heating values, and exhibit high to severe slagging propensity based on several existing slagging indices. Then the key issues for boiler design are discussed. The use of opposite firing has the advantage of slagging mitigation. Details are provided for the furnace size, burners layout, furnace exit flue gas temperature, furnace arch structure, tube array pitches, and the sootblower deployment. Besides the design considerations, operational optimization is required to reduce the risk of slagging, in which combustion control, slag monitor and effective sootblowing stand out.