新型钙铜-联合循环燃烧后CO_(2)捕集技术的工艺模拟与分析  

Process simulation and analysis of novel Ca and Cu-combined looping post-combustion CO_(2) capture technology

作　　者：高李帆 郑雅文 何松 杨智 王珺瑶 曾雪兰 GAO Lifan;ZHENG Yawen;HE Song;YANG Zhi;WANG Junyao;ZENG Xuelan(School of Ecology,Environment and Resources,Guangdong Basic Research Center of Excellence for Ecological Security and Green Development,Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education,Guangdong University of Technology,Guangzhou 510006,Guangdong,China;China Shenzhen Gas Co.,Ltd.,Shenzhen 518040,Guangdong,China;School of Material and Energy,Guangdong University of Technology,Guangzhou 510006,Guangdong,China)

机构地区：[1]广东工业大学生态环境与资源学院,湾区生态安全与绿色发展基础研究卓越中心,大湾区城市环境安全与绿色发展教育部重点实验室,广东广州510006 [2]深圳市燃气集团股份有限公司,广东深圳518040 [3]广东工业大学材料与能源学院,广东广州510006

出　　处：《低碳化学与化工》2025年第2期127-136,共10页Low-Carbon Chemistry and Chemical Engineering

基　　金：国家自然科学基金青年基金(72104257);广东省自然科学基金(2024A1515012661);广州市基础研究计划基础与应用基础研究项目(2024A04J3828)。

摘　　要：碳捕集、利用与封存(CCUS)技术是实现CO_(2)减排的重要技术,然而捕集能耗较高是限制CCUS技术大规模推广的重要问题之一。为降低捕集能耗,针对钙铜循环CO_(2)捕集技术中朗肯循环回收高品位余热效率较低的问题,提出了一种新型钙铜-联合循环燃烧后CO_(2)捕集技术。以水泥厂烟气为捕集源,采用Aspen Plus软件搭建模型进行流程模拟,对典型钙循环水泥厂集成系统(系统Ⅰ)、传统钙铜循环水泥厂集成系统(系统Ⅱ)和新型钙铜-联合循环水泥厂集成系统(系统Ⅲ)进行了热力性能与经济成本分析,并研究了部分操作参数对系统Ⅲ热力性能的影响。结果表明,在90%碳捕集率、针对单位质量CO_(2)时,系统Ⅲ减排CO_(2)的一次能源消耗为-0.87 MJ/kg,系统Ⅲ减排成本为265.8 CNY/t;与系统Ⅰ和系统Ⅱ相比,系统Ⅲ减排单位质量CO_(2)的一次能源消耗分别减少了2.91 MJ/kg和2.00 MJ/kg,减排成本分别降低了42.67%和41.41%;在一定条件下,降低CO_(2)捕集率、提升煅烧器温度或提升空气反应器温度,均可降低系统Ⅲ减排能耗;当空气反应器温度为950℃时,压力为1.5 MPa可使系统Ⅲ达到最低能耗(-0.87 MJ/kg)。Carbon capture,utilization and storage(CCUS)technology is essential for achieving CO_(2)emission reduction.However,the high energy consumption of the capture processes is a significant barrier to the widespread adoption of CCUS technology.To address this issue,the low efficiency of waste heat recovery in the Rankine cycle of Ca and Cu looping CO_(2)capture technology,a novel Ca and Cu-combined looping post-combustion CO_(2)capture technology is proposed.Using cement plant flue gas as the capture source,a process simulation model was constructed using Aspen Plus software.Thermodynamic performance and economic cost analysis were conducted for the typical Ca looping cement plant integrated system(system I),the conventional Ca and Cu looping cement plant integrated system(system II),and the novel Ca and Cu-combined looping cement plant integrated system(system III).Additionally,the impact of various operational parameters on the thermal performance of system III was investigated.The results indicate that under carbon capture rate of 90%and according to unit mass CO_(2),the primary energy consumption for CO_(2)reduction in system III is-0.87 MJ/kg and the reduction cost is 265.8 CNY/t.Compared to system I and system II,the primary energy consumption for CO_(2)reduction in systemⅢdecreases by 2.91 MJ/kg and 2.00 MJ/kg,respectively,while the reduction cost decreases by 42.67%and 41.41%,respectively.Under certain conditions,reducing the CO_(2)capture rate,increasing the calciner temperature or increasing the air reactor temperature can reduce the energy consumption of system III.When the air reactor temperature is 950℃,system III with pressure of 1.5 MPa can lead to the lowest energy consumption(-0.87 MJ/kg).

关 键 词：CO_(2)捕集 钙铜-联合循环 集成系统 减排 

分 类 号：TK11[动力工程及工程热物理—热能工程] X701[环境科学与工程—环境工程]