摘要
针对富氧燃烧电站能耗较高问题,构建增压富氧燃烧法碳捕集、利用与封存(carbon capture,utilization and storage,CCUS)系统,该系统采用三塔分段式空气分离系统(air separation unit,ASU)和汽化潜热回收系统。首先,分析O_(2)质量分数对机组能耗的影响,压力对汽化潜热回收、全流程参数及机组净功率的影响;其次,对比常压富氧燃烧、增压富氧燃烧模式下机组的技术经济性。分析结果显示,增压富氧燃烧机组最佳运行O_(2)质量分数为96%~97%,最佳燃烧系统压力为1.5~2.0 MPa;相对于常压富氧燃烧,增压富氧燃烧CO_(2)回避成本增加26%,CO_(2)捕集成本增加23%,但增压富氧燃烧模式下实际锅炉尺寸较小,可大幅减少电厂的建筑和安装工程费用,具有一定的技术经济性。
Aiming at the problem of high energy consumption of oxygen-enriched combustion power plants,a pressurized oxygen-enriched combustion carbon capture,utilization and storage(CCUS)system is constructed.The system uses a threetower segmented air separation unit(ASU)and a vaporization latent heat recovery system.Firstly,the influence of O_(2) mass fraction on the energy consumption of the unit,the influence of pressure on the latent heat recovery of vaporization,the whole process parameters and the net power of the unit are analyzed.Secondly,the technical and economic feasibility of the unit under atmospheric oxygen-enriched combustion and pressurized oxygen-enriched combustion modes is compared.The results show that the optimal operating O_(2) mass fraction of the pressurized oxygen-enriched combustion unit is from 96%to 97%,and the optimal combustion system pressure is from 1.5 MPa to 2.0 MPa.Compared with atmospheric oxygen-enriched combustion,the CO_(2) avoidance cost of pressurized oxygen-enriched combustion increases by 26%,and the CO_(2) capture cost increases by 23%.However,the actual boiler size under the pressurized oxygen-enriched combustion mode is smaller,which can significantly reduce the construction and installation cost of the power plant,and has certain technical and economic performance.
作者
付旭晨
高思远
王榕泽
韩义
段元强
王研凯
于英利
段伦博
FU Xuchen;GAO Siyuan;WANG Rongze;HAN Yi;DUAN Yuanqiang;WANG Yankai;YU Yingli;DUAN Lunbo(Inner Mongolia Power(Group)Co.,Ltd.,Inner Mongolia Electric Power Research Institute Branch,Hohhot O10020,China;Key Laboratory of Energy Thermal Conversion and Control,Ministry of Education(Southeast University),Nanjing 210096,China;Inner Mongolia Power(Group)Co.,Ltd.,Xilingol Power Supply Company Branch,Xilingol 02600o,China)
出处
《内蒙古电力技术》
2025年第6期95-101,共7页
Inner Mongolia Electric Power
基金
内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司自筹项目“循环流化床耦合CCUS储能调峰系统构建与经济技术研究”(2022-ZC-08)。
关键词
增压富氧燃烧
碳捕集、利用与封存
技术经济性
O_(2)质量分数
燃烧系统压力
pressurized oxygen-enriched combustion
carbon capture,utilization and storage(CCUS)
technical and economic performance
O_(2)mass fraction
combustion system pressure
