带百万吨级燃烧后脱碳装置的660MW燃煤 机组性能优化

摘要/Abstract

摘要：

摘要：燃煤机组燃烧后脱碳所面临的最大问题是脱碳带来的效率损失。对带百万吨级燃烧后脱碳的燃煤机组性能进行了优化研究。以提高机组发电效率和供电效率为目标，提出了烟气余热深度回收用于锅炉燃烧空气预热、烟气余热和脱碳余热用于凝结水加热的余热利用优化集成方案。研究发现，带百万吨燃烧后脱碳的机组能效未进行优化时机组发电效率下降约1.78%，供电效率下降约2.98%，其中脱碳再生抽汽造成的机组发电量降低和脱碳辅机电耗是造成机组能效降低的主要原因。与未进行优化的方案相比，余热利用优化集成方案机组发电效率提高约0.74%，供电效率提高约0.73%。以余热利用优化集成方案为基础，增加脱碳再生抽汽过热冷却器的最终优化集成方案可进一步提高机组发供电效率约0.04%。

关键词:

">关键词：燃煤机组；燃烧后脱碳；性能优化；能耗

Abstract:

Abstract:The biggest problem of post combustion decarburization is the efficiency loss of coalfired power unit. This paper conducted an optimization study on the performance of coalfired power unit with a megaton class post combustion decarburization device. Aimed at increasing the power generation efficiency and supply efficiency, this paper proposed an optimized integration scheme of waste heat utilization, which used depth recovered waste heat of flue gas to preheat boiler air, and used waste heat of flue gas and decarburization to heat condensation water. This study found that the power generation efficiency and supply efficiency of unit with a megaton class post combustion decarburization device declined about 1.78% and 2.98% respectively before optimization, and the main reasons were the generating capacity reduction caused by decarburization regeneration steam extraction and the power consumption of decarburization auxiliary engine. After adopting the optimized integration scheme, power generation efficiency and supply efficiency increased about 0.74% and 0.73% respectively. Based on the optimized integration scheme, the ultimate optimized integration scheme, which was added a superheating cooler for decarburization regeneration steam extraction, the power supply efficiency of unit could be further increased about 0.04%.

Key words:

Keywords:coal fired power unit, post combustion decarburization, performance optimization, energy consumption

鞠付栋，朱大宏，聂会建，孙永斌. 带百万吨级燃烧后脱碳装置的660MW燃煤机组性能优化[J]. 华电技术, 2016, 38(9): 1-3.

JU Fudong, ZHU Dahong, NIE Huijian, SUN Yongbin.

Performance optimization of 660MW coal fired power unit with a megaton class post combustion decarburization device

[J]. Huadian Technology, 2016, 38(9): 1-3.

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