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首页> 外文期刊>Energy >Collaborative optimization of energy conversion and NO_x removal in boiler cold-end of coal-fired power plants based on waste heat recovery of flue gas and sensible heat utilization of extraction steam
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Collaborative optimization of energy conversion and NO_x removal in boiler cold-end of coal-fired power plants based on waste heat recovery of flue gas and sensible heat utilization of extraction steam

机译：基于废热回收烟气热回收燃料气及萃取蒸汽的清热利用的燃煤发电厂锅炉冷端的能量转换和NO_X去除的协作优化。

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摘要

Based on the close relationship among the feed water heating process, Selective catalytic reduction (SCR) de-NO_x and air preheating process, collaborative optimization of energy conversion and NO_x removal in the boiler cold-end of coal-fired power plants is proposed in this paper. In the proposed system, recovery of flue gas waste heat and sensible heat efficient utilization of extraction steam provide engineering support for the collaborative optimization concept. The proposed system achieves optimal performance by increasing SCR de-NO_x temperature and energy for air preheating. The results reveal that, based on 50% load of a typical 1000 MW coal-fired power plant, the proposed system could increase 5.4 MW_e of additional output power with a 0.47% increase of thermal efficiency. The increase of SCR de-NO_x temperature brings 6.5% of NO_x removal efficiency increase and 28.4 mg/Nm~3 of NO_x emission decrease. Besides, the proposed system gains 2.27 million USD of extra annual income. In general, the proposed system achieves great energy savings, NO_x removal, and economic performances.
机译：基于进料水加热过程中的密切关系，选择性催化还原（SCR）DE-NO_X和空气预热过程，提出了燃烧发电厂锅炉冷端中的能量转换和NO_X去除的协作优化纸。在所提出的系统中，烟道气废料的回收率和萃取蒸汽的清热利用提供了协作优化概念的工程支持。所提出的系统通过增加SCR DE-NO_X温度和空气预热能量来实现最佳性能。结果表明，基于50％负载典型1000 MW燃煤发电厂，所提出的系统可以增加5.4 MW_E的额外输出功率，热效率增加0.47％。 SCR DE-NO_X温度的增加带来了6.5％的NO_X去除效率增加，28.4mg / nm〜3的NO_X排放减少。此外，拟议的系统额外收益227万美元额外的年收入。一般而言，拟议的系统实现了巨大的节能，删除和经济表演。

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