捕集纯化CO_(2)气体技术在水泥行业中的应用研究  

The Research on the Application of CO_(2)Capture and Purification Technology in Cement Industry

作　　者：唐滨江 陈丽 唐金泉 TANG Binjiang;CHEN Li;TANG Jinquan(Tianjin Puli Carbon Energy Conservation and Environmental Protection Technology Co.,Ltd.,Tianjin 300403,China)

机构地区：[1]天津普利碳节能环保科技有限公司,天津300403

出　　处：《水泥技术》2024年第3期66-72,共7页Cement Technology

摘　　要：介绍了工业窑炉废气中的CO_(2)气体捕集纯化常用的MEA(乙醇胺)化学吸附技术,外加热式回转窑及立窑直接捕集纯化技术的工艺流程、主要装置及研发过程;重点对比介绍了化学吸附技术和外加热式回转窑捕集技术在国内水泥行业中的应用。化学吸附技术捕集纯化CO_(2)气体,产品品质较差,生产成本较高,投资回收期>10年;外加热式回转窑捕集技术,可直接捕集碳酸盐加热分解产生的CO_(2),产品品质高、能耗低,投资回收期仅3~4年。某水泥生产线应用外加热式回转窑捕集技术,回转窑规格ϕ(2.2~2.8)m×65.8m,年可捕集纯化食品级液态CO_(2)>6.0×10^(4)t、年可生产石灰粉(CaO)>15.3×10^(4)t,投资收益较高,推广应用前景广阔。The MEA(ethanolamine)chemisorption technology commonly used for the capture and purification of CO_(2)gas in industrial kiln exhaust gas was introduced,including the process flow of external heating rotary kiln and vertical kiln direct capture and purification technology,main equipment and research and development process.The key points focus on comparing the application status of chemical adsorption technology and externally heated rotary kiln capture technology in the domestic cement industry.For chemical adsorption technology captures and purifies CO_(2)gas,the quality of the product is poor and the production cost is higher with the payback period>10 years.Comparably,for externally heated rotary kiln capture technology,it can directly capture CO_(2)produced by thermal decomposition of carbonates,the product is of high quality with low energy consumption and short payback period of only 3~4 years.A externally heated rotary kiln capture technology was applied in a cement production line,where the specifications of rotary kilnϕ(2.2~2.8)m×65.8m.It can capture and purify food-grade liquid CO_(2)more than 6.0×10^(4)t per year,at the same time,it can produce lime powder(CaO)more than 15.3×10^(4)t per year,achieving a higher payback on investment and bring a broad promotion and application prospect.

关 键 词：捕集纯化CO_(2) 化学吸附法 直接捕集法 外加热式回转窑 余热回收装置 

分 类 号：TQ172.9[化学工程—水泥工业]