燃煤烟气全流程CCUS系统的技术经济分析

Technical and Economic Evaluation of Whole-Process CCUS

燃煤电站全流程CO2捕集、利用与封存(CCUS)装置各个环节选用合适的技术决定其经济性,采用逐项比较的方法,确定出在不同条件下CO2捕集、压缩、输送及驱油各个不同工段应采用的工艺技术,然后分别从建设投资与运行成本角度分析了各个工段的影响因素并有针对性地提出优化措施,并对3个100万t/a相同规模的不同地址燃煤电厂与不同位置油田驱块的组合方案进行了经济性评价。结果表明,CO2输送距离是建设总成本的主要影响因素,而中长期CO2公用输送管网的规划完善将弥补CO2平均输送距离带来的成本增加。

The economics of the carbon capture, utilization and storage （CCUS） technology is determined by the suitable technologies selected in the stages of the whole process of CCUS in coal-fired power plants. In this paper, the technologies adopted in the CO2 capture, compression, transportation and enhanced oil recovery under different conditions are derived through itemized comparison. Then the influencing factors of the technologies are analyzed in the aspects of construction investment and operation costs with some optimization measures proposed. Through the comparison between three CCUS schemes assuming each with the capacity of 1 million tons per year for different power plant and oil field compositions, it is concluded that the CO2 transmission distance is the major factor influencing the total construction cost. However, the cost increase from the average transmission distance may be compensated by the completion of medium-long term plan for common CO2 transmission piping networks.