碳捕集系统与燃煤发电机组耦合特性

发布时间：2018-12-12 20:38

【摘要】：针对基于MEA碳捕集系统对燃煤发电机组经济性影响的问题,以某600MW超临界燃煤机组为研究对象,计算了吸收剂的再生能耗,提出了碳捕集系统3种解吸热源方案:方案1是以机组第4段抽汽作为再沸器的热源;方案2是以第4段抽汽及第5段抽汽共同作为再沸器的热源;方案3是以机组新增加的抽汽段作为再沸器的热源。建立了耦合系统经济性评价指标,分析了3种方案机组的经济性。结果表明:3种方案均具有可行性,基于压力匹配原则的耦合方案3优于方案1与方案2,工况一定时,方案3的热效率分别比方案1和方案2高出2.04%,1.84%。方案3的热效率比不进行碳捕集机组热效率降低了4.76%,发电成本增加了0.154元/(kW·h)。
[Abstract]:Aiming at the influence of MEA carbon capture system on the economy of coal-fired generating units, the regeneration energy consumption of absorbent was calculated by taking a 600MW supercritical coal-fired unit as the research object. Three schemes of desorption heat source for carbon capture system are put forward. Scheme 1 is to take the fourth stage of the unit as the heat source of the reboiler; The second scheme is to take the fourth stage extraction and the fifth stage extraction as the heat source of the reboiler, and the third scheme is to take the newly added extraction section of the unit as the heat source of the reboiler. The economic evaluation index of coupling system is established, and the economy of three schemes is analyzed. The results show that the three schemes are feasible, and the coupling scheme 3 based on the principle of pressure matching is superior to scheme 1 and scheme 2, and the thermal efficiency of scheme 3 is 2.04% higher than that of scheme 1 and scheme 2 when the working conditions are fixed. The thermal efficiency of scheme 3 is 4.76% lower than that of unit without carbon capture, and the cost of generating electricity is increased by 0.154 yuan / (kW h).
【作者单位】：电站设备状态监测与控制教育部重点实验室(华北电力大学);
【基金】：国家自然科学基金资助项目(51076044,51306059) 中央高校基本科研业务专项资金资助项目(13XS38)
【分类号】：TM611

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