二次再热燃煤-捕碳-制甲醇系统集成设计与优化  

System Integration Design and Optimization of Double-reheat Coal-fired Power Unit with CO_(2) Capture and Methanol Production

作　　者：付文锋[1] 窦艳滨 王蓝婧[2] 崔庆伟 FU Wenfeng;DOU Yanbin;WANG Lanjing;CUI Qingwei(Hebei Key Laboratory of Low Carbon and High Efficiency Power Generation Technology,North China Electric Power University,Baoding 071o03,Hebei Province,China;School of Control and Computer Engineering,North China Electric Power University,Baoding 071o03,Hebei Province,China;Zhejiang Zheneng Lanxi Electric Power Generation Co.,Ltd.,Lanxi 321100,Zhejiang Province,China)

机构地区：[1]华北电力大学河北省低碳高效发电技术重点实验室,河北保定071003 [2]华北电力大学控制与计算机工程学院,河北保定071003 [3]浙江浙能兰溪发电有限责任公司,浙江兰溪321100

出　　处：《动力工程学报》2024年第1期118-127,共10页Journal of Chinese Society of Power Engineering

基　　金：国家自然科学基金资助项目(52090064);中央高校基本科研业务费专项资金资助项目(2022MS080)。

摘　　要：针对碳捕集电厂的高能耗及CO_(2)的后续利用问题,设计了一种二次再热燃煤-捕碳-制甲醇一体化系统。以某1000 MW超超临界二次再热机组为例,采用动态自适应粒子群优化算法对所提系统参数进行优化计算,分析了碳捕集率和光电制氢成本等因素对系统性能的影响。结果表明:当碳捕集率为90%时,一体化系统的热效率相比燃煤-捕碳机组提高了6.62%,CO_(2)排放强度降低了4.45 g/(kW·h),净收益提高了33.42亿元;当碳捕集率在40%~90%内变化时,一体化系统的热效率能够稳定保持在49%以上;随着未来光电制氢成本的下降,一体化系统的净收益将显著提升。Aiming at high energy consumption and subsequent CO_(2)utilization in power plants with carbon capture,an integration system of double-reheat coal-fired power unit with CO_(2)capture and methanol production was designed.Taking a 1000 MW double-reheat ultra-supercritical power generation unit as an example,the optimization of this proposed system was performed using dynamic adaptive particle swarm optimization algorithm.Then the influence of carbon capture rate and photoelectric hydrogen production cost on its performance was analyzed.Results show that at the carbon capture rate of 90%,the thermal efficiency and net benefit of this proposed system increase by 6.62%and 3.342 billion yuan,respectively,while the CO_(2)emission intensity reduces by 4.45 g/(kW·h)compared with the coal-fired unit with CO_(2)capture.The thermal efficiency of this integrated system can be maintained at above 49%when the carbon capture rate changes within the range of 40%~90%.As the cost of photovoltaic hydrogen production decreases,the net benefit of this integrated system will be significantly improved in the future.

关 键 词：二次再热机组 碳捕集 制甲醇 热力系统集成 优化设计 

分 类 号：TK284.1[动力工程及工程热物理—动力机械及工程]