摘要
现有碳捕集技术能耗巨大,成本难以承受。同时,近年来我国的城市固体废物量急剧增加,垃圾焚烧作为一种合适的垃圾处理与能源回收技术,相较燃煤电厂,其热效率较低,造成一定能量浪费。因此,为了降低碳捕集的热量消耗,同时提高城市固体废弃物的热利用率,提出了一种创新的耦合系统,将垃圾发电厂与燃煤发电厂以及碳捕集技术基于能量梯级利用原则结合在一起,创新点有(1)城市固体废弃物燃烧热的高品位部分用于加热燃煤发电厂的再热蒸汽,提升了其利用效率;(2)城市固体废弃物燃烧热的低品位部分用于碳捕集系统的再沸器,降低了抽汽引起的热损失;(3)由于系统集成,垃圾发电厂的设备得到精简,降低了系统复杂度,且避免了一部分能量损失。基于现有电厂的设计参数,进行了参考系统建模与耦合方案设计,并使用能量分析与?分析对创新系统进行了评价。结果表明,提出的耦合系统净发电的热效率提高了0.66%,?效率提高了0.64%,净发电量增加了5.39 MW。
Existing carbon capture technologies have significant energy consumption and cost burdens that are difficult to bear.Meanwhile,the amount of urban solid waste in China has been rapidly increasing in recent years.Incineration of waste is considered a suitable waste treatment and energy recovery technology.However,compared to coal-fired power plants,waste incineration has lower thermal efficiency,resulting in certain energy waste.Therefore,in order to reduce the heat consumption of carbon capture and improve the thermal utilization of urban solid waste,an innovative coupling system is proposed,which integrates waste-to-energy plants,coal-fired power plants,and carbon capture technologies based on the principle of energy cascade utilization.The specific innovations are as follows:①The high-grade heat from the combustion of urban solid waste is used to reheat the steam in the coal-fired power plant,thereby improving its efficiency.②The low-grade heat from the combustion of urban solid waste is utilized in the reboiler of the carbon capture system,reducing the heat loss caused by steam extraction.③Due to system integration,the equipment of the waste-to-energy plant is streamlined,reducing system complexity and avoiding some energy losses.Based on the design parameters of existing power plants,reference system modeling and coupling scheme design were carried out,and the innovative system was evaluated using energy analysis and exergy analysis.The results show that the proposed coupling system increases the net power generation thermal efficiency by 0.66%,the exergy efficiency by 0.64%,and the net power generation capacity by 5.39 MW.
作者
王新刚
于志勇
吴高磊
朱子民
王轶男
陈衡
WANG Xingang;YU Zhiyong;WU Gaolei;ZHU Zimin;WANG Yinan;CHEN Heng(State Grid Xinjiang Electric Power Company Limited,Urumqi 830063,China;Economic Technology Research Institute,State Grid Xinjiang Electric Power Company Limited,Urumqi 830011,China;Electric Power Research Institute,State Grid Xinjiang Electric Power Company Limited,Urumqi 830011,China;College of Energy,Power and mechanical Engineering North China Electric Power University,Beijing 102206,China)
出处
《洁净煤技术》
CAS
CSCD
北大核心
2024年第S01期348-355,共8页
Clean Coal Technology
基金
国网新疆电力有限公司科技资助项目(SGXJ0000FCJS2310225)
关键词
垃圾焚烧发电机组
燃煤发电机组
碳捕集与封存
耦合发电系统
能量梯级利用
waste-to-energy plant
coal-fired power plant
carbon capture and storage
hybrid power generation system
energy cascade utilization
作者简介
王新刚(1979—),男,新疆乌鲁木齐人,高级工程师,硕士。E-mail:23935104@qq.com;通讯作者:陈衡(1989—),男,辽宁葫芦岛人,副教授,博士。E-mail:heng@ncepu.edu.cn
