水泥行业双碳体系下全氧燃烧碳减排技术装备研发及示范应用  

Research and Demonstration Application of Oxy-fuel Combustion Carbon Reduction Technology and Equipment under the Dual Carbon System in the Cement Industry

作　　者：彭学平[1] 陈昌华[1] 代中元 万夫伟[1] 金周政 PENG Xueping;CHEN Changhua;DAI Zhongyuan;WAN Fuwei;JIN Zhouzheng(Tianjin Cement Industry Design&Research Institute Co.,Ltd.,Tianjin 300400,China)

机构地区：[1]天津水泥工业设计研究院有限公司,天津300400

出　　处：《水泥技术》2024年第5期11-18,共8页Cement Technology

基　　金：中国建材集团有限公司关键核心技术攻关第一批“揭榜挂帅”项目(2021HX0101);中国中材国际工程股份有限公司“十四五”第一批重点科研项目(2021ZC001)。

摘　　要：分析了水泥工业碳排放的来源及特点,介绍了实现水泥工业碳减排的主要技术路径,对比了全氧燃烧、钙循环、燃烧后捕集等典型碳捕集纯化技术特点,结果表明,采用全氧燃烧技术综合成本较低,碳减排效率较高。通过全氧燃烧关键核心技术装备攻关,研发了“强旋流全氧预燃烧炉+富集提浓组合式分解炉”专利技术,建立了O_(2)/CO_(2)介质的燃烧模型和高CO_(2)浓度下的生料分解模型,进行了全氧耦合无焰燃烧技术开发和热态模拟中试试验,建成了国内外水泥行业规模最大的年捕集20万吨CO_(2)工业级示范线。实践表明,利用全氧燃烧技术,可将水泥厂废气中的CO_(2)浓度提高至80%以上,经过变压吸附和低温蒸馏后,CO_(2)纯度>99%。This paper analyzes the sources and characteristics of carbon emissions and the main technical paths of carbon emission reduction in the cement industry.Therefore,breakthrough technologies such as novel and efficient carbon dioxide capture,utilization,and storage technologies,including oxy-fuel combustion,calcium cycling and post-combustion capture were introduced.The results indicate that the use of oxy-fuel combustion technology has lower overall costs and higher carbon reduction efficiency.Through tackling key core technologies and equipment for oxy-fuel combustion,developing the patented technology of"strong swirly pre-combustion furnace+CO_(2)-enriched combined calciner".Based on CPFD simulation,combustion models in O_(2)/CO_(2) and raw meal decomposition models under high CO_(2) concentrations were established in depth to direct oxy-fuel coupled flameless combustion technology and thermal simulation pilot tests.The largest cement industrial-grade demonstration line with an annual capture capacity of 200000 tons of CO_(2) in the worldwide has been established.Practical applications show that using oxy-fuel combustion technology can enhance the CO_(2) concentration in flue gas to over 80%.Finally,the concentration of CO_(2) flue gas can be further increased to more than 99%by pressure swing adsorption and low temperature distillation.

关 键 词：全氧燃烧 碳捕集 热态模拟 碳减排 

分 类 号：TQ172.622.19[化学工程—水泥工业]