燃煤电厂与醇胺法碳捕集系统耦合方案的改进及经济性分析

发布时间：2017-12-27 20:21

本文关键词：燃煤电厂与醇胺法碳捕集系统耦合方案的改进及经济性分析　出处：《煤炭学报》2015年S1期 　论文类型：期刊论文

【摘要】：针对碳捕集系统再生能耗高的问题,以我国600 MW超临界燃煤机组为研究对象,分析了机组8段抽汽的品位,引入可以提高低压蒸汽压力的专用设备——汽汽引射器,提出了碳捕集系统与燃煤发电机组的耦合方案,建立了发电机组的经济性指标,研究了碳税价格和碳售出价格对发电机组发电成本的影响。研究结果表明:当碳捕集率取85%、MEA吸收剂质量分数取30%时,二氧化碳捕集单位再生能耗为3.84 GJ/(t CO2);耦合机组发电成本随碳税价格的升高而有所升高,随着碳售出价格的升高而降低;参考机组的发电成本随碳税价格的升高而明显升高,不随碳售出价格的变化而变化;当系统操作参数一定时,耦合发电系统全厂热效率为37.05%,与非耦合系统的热效率43.14%相比,降低了6.09%,发电标准煤耗升高了0.047 g/(k W·h),发电成本增加了0.171元/(k W·h)。
[Abstract]:For the regeneration of carbon capture systems the problem of high energy consumption in China, with 600 MW supercritical coal-fired units as the research object, analyzes the unit extraction 8 grade, the introduction of special equipment can improve the low steam pressure, steam ejector, the coupling scheme of carbon capture systems and coal-fired generating units. Economic indicators established generator, studied the carbon tax and carbon prices affect the price on the power generation cost sold. The results show that when the carbon capture rate of 85%, 30% when the mass fraction of MEA absorber, carbon dioxide capture unit of energy regeneration was 3.84 (t GJ/ CO2); the coupling unit cost of power generation with increasing carbon tax and the price has increased, decreased with increasing carbon prices; the cost of power generation units with reference increased carbon tax price increased, with carbon sold price changes; when the system operation parameters, coupling power plant thermal efficiency system is 37.05%, compared with 43.14% non thermal efficiency of the coupling system is reduced by 6.09%, standard coal consumption increased by 0.047 g/ (K W h), power generation increase the cost of 0.171 yuan / (K W 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);河北工程大学水电学院;
【基金】：中央高校基本科研业务专项资金资助项目(13XS38)
【分类号】：TM621
【正文快照】： 人类的生存与活动造成大气中的二氧化碳的过量排放,从而引起全球的温室效应[1]。燃煤电厂烟气排放是二氧化碳的主要排放源,具有巨大减排潜力,因此,碳捕集技术渐趋于成熟,尤其是燃烧后醇胺法碳捕集技术更适合于现有电厂的改造,还被认为是目前减少二氧化碳排放量的最可行方案。

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