基于技术经济学的碳捕集系统参数影响分析及优化  

Analysis and Optimization of Parameters in Carbon Capture System Based on Technical Economics

作　　者：韩中合[1] 白亚开 

机构地区：[1]华北电力大学电站设备状态监测与控制教育部重点实验室,河北保定071003

出　　处：《华北电力大学学报（自然科学版）》2015年第6期92-100,共9页Journal of North China Electric Power University：Natural Science Edition

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)

摘　　要：在燃煤机组中添加碳捕集设备是现阶段实现CO2减排的有效途径,但是碳捕集设备的添加往往造成机组能耗和成本的显著增加。从碳捕集系统仿真模型和碳捕集机组耦合系统出发,基于技术经济学方法,分析了碳捕集系统主要参数对再生能耗、发电成本以及捕碳成本的影响,选取了碳捕集系统最佳运行参数。结果显示捕集率在85%的情况下,贫液负荷为0.24 mol/mol、MEA溶液浓度为30%、再生塔压力为0.19 MPa、贫液入口温度为40℃时碳捕集系统运行状态最佳,此时再生能耗为3.963 GJ/t CO2,发电效率为35.450%,发电煤耗为346.979 g/k W·h,发电成本为0.564$/k W·h,捕碳成本为299.417$/t CO2。Adding carbon capture system to the power plant is now perceived to be the most efficient way to reduce CO2 emission. But the addition of carbon capture equipments will significantly increase the energy consumption and the cost of the power plant. Wherefore,this paper establishes the simulation model of the carbon capture system and proposes the coupling method of the carbon capture plant. Then,based on technical economics,the influence of the main parameters in the carbon capture system on the regeneration energy requirement of the system,power generation cost and the cost of carbon capture of the plant are analyzed. At last,the optimal operation parameters of the carbon capture system are selected. The results show that when the capture rate is 85 %,the optimal lean solvent loading is 0. 24 mol /mol,MEA solution concentration is 30 %,pressure in the regenerating column is 0. 19 MPa and the lean solvent inlet temperature is 40 ℃. Under these conditions,the carbon capture system is in its optimum state of performance. That means the regeneration energy requirement is 3. 963 GJ / t CO2,power generation efficiency 35. 450%,coal consumption346. 979 g / k W· h,electricity cost 0. 564 $ / k W· h,cost per ton CO2 avoided 299. 417 $ / t CO2.

关 键 词：碳捕集 优化 发电成本 捕碳成本 再生能耗 

分 类 号：TM615[电气工程—电力系统及自动化]