一种新型氨法脱碳工艺的流程模拟与能耗分析

Process Simulation and Analysis of Energy Consumption for a New Technology of Carbon Capture

基于300 MW燃煤电站,采用流程模拟软件Aspen Plus,建立了传统的氨法大规模捕集CO2的模型,同时建立了一种新型的氨法脱碳模型。进一步对比分析了新型氨法脱碳工艺与传统的富液再生工艺的操作参数对脱碳效率、氨逃逸量、CO2出口流量以及再生能耗的影响。得出:新型的脱碳工艺在CO2的吸收与再生过程中较传统工艺有较大的优越性。在吸收过程中,新工艺在保证高的吸收反应速率的同时,也保证了高的NH3利用率;再生过程中,新工艺再生的CO2量高出传统工艺约30%,新工艺的再生能耗远低于传统工艺,当选用最优操作参数时新工艺的再生能耗仅为传统工艺的41.5%。因此新工艺更为经济。

Base on a 300 MW power plant, using software Aspen plus, the traditional and the new model was set up. Comparative analysis of the effects of the operating parameters on CO2 removal efficiency, ammonia escape, CO2 removal amount and regeneration heat duty between the two technologies was carried out. Obtaining that the new technology has a great advantage on CO2 absorption and desorption process. In absorption process, the new technology guarantees the high reaction rate and the high NH3 efficiency. In desorption process, the new technology capture the amount of carbon more 30% than the old technology, More important, the regeneration heat duty of the new technology is only 41.5% of the traditional one. So, the new technology is more economic..