基于双流化床模型的高温钙基碳捕集流程敏感性分析

Sensitivity analysis of high-temperature calcium looping CO_(2)capture process based on dual fluidized bed model

介绍了几种碳捕集技术方法,高温钙基循环采用石灰石作为吸附剂,是一种高效的燃烧后二氧化碳捕集技术。利用Aspen Plus软件建立了高温钙基循环捕集工艺模型,优化了碳酸化反应过程工艺参数,得到了以下结论:当碳酸化反应温度为630℃、煅烧反应温度为900℃、F_(0)/F_(CO_(2))为0.04、气固分离效率为1.0、烟气SO_(2)体积分数为0.1%,可实现CO_(2)捕集率高于90%,净烟气CO_(2)体积分数低于4.0%,与改造或新建电厂的实际应用参数相一致。

Several methods of carbon capture technology are introduced.Calcium looping is an efficient post-combustion CO_(2)capture technology using limestone sorbent,which is more energy-saving than traditional technologies.A calcium looping process model is developed using Aspen Plus software.Some main parameters which affected the whole process performance are discussed.The simulation results show that when the carbonation reaction temperature is 630℃,the calcination reaction temperature is 900℃,F_(0)/F_(CO_(2))is 0.04,the gas-solid separation efficiency is 1.0,the volume fraction of SO_(2)in flue gas is 0.1%,the CO_(2)capture rate is higher than 90%,and the volume fraction of CO_(2)in decarbonated flue gas is lower than 4.0%,which is consistent with the actual application parameters of retrofitted or new power plants.