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热力发电  2015 

增压富氧焚烧垃圾近零排放电站技术经济性分析

, PP. 21-26

Keywords: 垃圾焚烧发电,增压富氧燃烧,近零排放,净效率

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Abstract:

提出了一种新型增压富氧焚烧垃圾近零排放电站的设计概念,采用液态排渣增压垃圾焚烧锅炉,增加制氧装置与烟气压缩净化回收系统。以日焚烧1100t城市垃圾的汽轮机发电机组为例,计算了炉膛压力分别为0.5,1.0,1.5mpa下发电机组的经济性,并与常压富氧焚烧技术进行对比。结果表明:由于锅炉炉膛压力增高,烟气中水蒸气的凝结热可用于加热汽轮机低温凝结水,减少汽轮机抽汽量,增加汽轮机发电功率,发电机组输出功率可达到25mw左右;空气分离制氧电耗约占发电量的34%,co2压缩电耗占发电量的5%,低于常压富氧焚烧。综合考虑电站其他辅机电耗后,0.5~1.5mpa炉膛压力下的增压富氧焚烧垃圾发电机组的净效率可提高9.31%~9.90%。

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