College of Smart Energy,Shanghai Jiao Tong University
Institute of Thermal Energy Engineering,School of Mechanical Engineering,Shanghai Jiao Tong University

以日产3000t熟料的水泥干法生产设备为研究对象,采用AspenPlus软件建立了水泥生产系统富氧燃烧改造的工艺流程模型,研究了采用富氧煤粉燃烧方式生产水泥熟料的系统能量效率和CO2捕集成本。结果表明:在相同的水泥熟料生产条件下,当烟气再循环率为51%时富氧燃烧气氛下系统沿程温度分布与空气气氛下相匹配,此时富氧燃烧整体氧气体积分数为26.4%。富氧燃烧方式需要配置的空气分离装置和CO2纯化压缩装置将导致系统能量效率比传统生产方式下降18.9%,并且采用该方式生产1t水泥熟料需花费532.1元。但在CO2捕集成本方面,采用富氧煤粉燃烧技术生产水泥熟料的系统CO2捕集成本为227.3元/t,比传统的燃烧后CO2捕集成本降低了58%。因此,对水泥熟料采用富氧燃烧技术生产,可以保证熟料的产量和品质,同时CO2捕集成本也比燃烧后CO2捕集成本更低,具有显著优势。

The dry process cement production equipment with a daily production capacity of 3,000 tonnes of clinker was taken as theresearch object,and Aspen Plus software was used to establish the corresponding production process model. The system energy efficiencyof cement clinker production by using oxygen-fuel pulverised coal combustion was investigated,as well as the CO2 capture and integrationof the system. The results show that a flue gas recirculation rate of 51% results in an oxygen-fuel atmosphere with the overall oxygenconcentration of 26.4% with the temperature profile of the system closest to the air atmosphere at the same cement clinker inputcondition. The air separation device and CO2 purification and compression device required for oxygen-fuel combustion will lead to adecrease in the energy efficiency of the system,which is 18.9% lower than that of the traditional method,and the production of 1 tonne ofcement clinker using this method costs 532.1 yuan. However,the CO2 capture cost of the system for cement clinker production usingoxygen-fuel pulverised coal combustion technology is 227.3 yuan/t,which is 58% lower than that of the traditional post-combustion CO2capture cost. Accordingly,the use of oxygen-fuel combustion technology for cement clinker production not only ensures the clinker yieldand quality,but also has a significant carbon capture cost advantage as the CO2 capture cost is lower than that of post-combustion carboncapture technologies.

国家自然科学基金资助项目(51976120)

陈涛,王玉亭,周月桂.水泥生产系统富氧燃烧改造的性能模拟优化[J].洁净煤技术,2025,31(2):20−28.

CHEN Tao,WANG Yuting,ZHOU Yuegui. Simulation optimization of oxygen-fuel combustion retrofitting of cementproduction system[J].Clean Coal Technology,2025,31(2):20−28.