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Comparing Method Analysis for Lower Steam Temperature of 660MW Supercritical Lignitic Boiler

机译：660MW超临界褐煤灰锅炉较低蒸汽温度的比较方法分析

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摘要

The problem of lower main steam temperature (MST) of a supercritical boiler designed for burning high moisture lignite is analyzed. By comparing to another structure-similar subcritical boiler, the effects of coal, furnace size, combustion mode and heating surface distribution are studied. The results show that the major cause of this lower MST problem is unduly decline of high temperature heating area due to over-estimating the heat transfer capability of the upper furnace water wall of the supercritical boiler. At last, this document suggests to the increase the size of rear part of partition platen superheater (SH) to solve the problem and has a certain actual guiding reference.
机译：分析了专为燃烧高水分褐煤设计的超临界锅炉的较低主蒸汽温度（MST）的问题。通过比较另一个结构类似的亚临界锅炉，研究了煤，炉尺寸，燃烧模式和加热表面分布的影响。结果表明，由于过度估计超临界锅炉的上炉水壁的传热能力，这种较低的MST问题的主要原因是高温加热面积的过度下降。最后，本文档建议增加分区压板过热器（SH）的后部大小以解决问题并具有一定的实际指导参考。

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