电站锅炉深度降低排烟温度的理论分析与计算

Theoretical analysis and calculation of deep reducing outlet gas temperature of power boilers

介绍了深度降低排烟温度的概念,分析了深度降低排烟温度与烟囱防腐的内在关联,探讨了汽轮机额外冷源损失在深度节能系统中的评价以及低烟温传热形成的受热面防腐设计的关键技术,最后指出,应根据机组的实际情况拟定深度降低排烟温度方案,以追求增发电功的最大化。

The concept of deep reducing the outlet gas temperature was introduced.The internal relation between the deep reducing the outlet gas temperature and the chimney corrosion pre-vention was analyzed.The evaluation of the additional cold source loss of the steam turbine in the deep energy-saving system was discussed;and the key technology of heating surface corrosion prevention design was researched,here the corrosion is caused by the lower outlet gas temperature.It was pointed out finally that the scheme of deep reducing outlet gas temperature must be formulated according to the practical situation of the unit to get the maximum of the increased electricity.