摘要
论述了当前中国捕集CO2的必要性,探讨了适合中国的CO2捕集技术。CO2捕集技术主要分为燃烧前捕集、氧化燃料燃烧捕集、燃烧后捕集3类。由于中国短期内没有能力建设大规模的包含CO2捕集及储存系统的电厂,重点探讨现有电厂的改进问题。很多国家开展了基于燃煤电厂CO2捕集技术研究,并达到了中试实验水平。中国对于CO2捕集技术的研究始于20世纪80年代,研究重点主要偏向于燃烧前及燃烧后,忽略了氧化燃料燃烧问题。从国外对氧化燃料燃烧和燃烧后CO2捕集技术的对比研究看,将一个普通的煤燃烧电厂更新改进成燃烧后捕集电厂所需资本大于改进成氧化燃料燃烧系统需要的资本,而且更新后的氧化燃料燃烧系统运行与维修成本约为燃烧后捕集电厂的一半。氧化燃料燃烧CO2捕集技术投资和运营成本低,且CO2捕集率高,是适合中国现阶段国情的CO2捕集技术。
The emission of CO2 in China ranks top in the world. China has the responsibility to dedicate more effort in CO2 capture technology. This paper studies the CO2 capture technology in China. In China, pulverized coal plants are very common and there are no plans for new plants to be built with carbon dioxide capture and storage systems in a near future. This paper focuses on the retrofit of existing pulverized coal plants, which involves three main technologies, including pre-, post and oxy-fuel combustions for CO2 capture, now still in the primary stage development as compared to other countries, especially European countries. The comparisons between different CO2 capture technologies show that the oxy-fuel combustion technology performs better than other technologies both in technologic and economic evaluations. The total capital cost for retrofitting a conventional PC plant with CO2, SO2, NOx, and Hg removal equipment installations （post-combustion） is more than that of the Oxy＇FGR modification. The total O＆M cost of an Oxy-FGR retrofit is about half of that of the MEA retrofit. Oxy-fuel combustion technology is a better choice for existing pulverized coal plants.
出处
《科技导报》
CAS
CSCD
北大核心
2010年第4期97-100,共4页
Science & Technology Review
关键词
CO2捕集技术
燃煤电厂
CO2捕集电厂
CO2 capture technology
coal-fired power plant
CO2 capture power plant
