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氨法捕集二氧化碳工艺的流程模拟
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作者：航院 摘要：大量CO2排放是引发全球变暖的主要原因.化学吸收法是减少化石燃料电厂CO2排放可行的办法.氨水以其高CO2脱除率,低吸收热和能同时脱除SO2和NOx等污染物得到了广泛的关注.目前尚缺乏大规模碳捕集装置及其操作工艺的详细分析.本文的研究目的是采用流程模拟方法分析500MW规模燃煤电厂烟气氨法脱碳工艺流程并进行优化,给出工艺操作参数.本文基于常温常压下氨法捕集CO2工艺流程,对于CO2捕集系统,首先,采用Aspen Plus的平衡级模型RadFrac用来预估贫液氨浓度和流量;然后,采用Aspen Plus的基于速率模型RateFrac来优化吸收塔尺寸;最后,综合考虑吸收及再生过程的耦合关系,优化吸收塔及再生塔的工艺操作参数.此外,进行了泄漏NH3捕集过程的分析和优化.Increasing CO2 emissions is the main reason for the global warming. Chemical absorption is considered as a feasible method for reducing CO2 emission from fossil fuel power plants. Aqueous ammonia has recently received wide concerns for its high CO2 removal efficiency, low absorption heat and the potential of removing SO2 and NOx simultaneously. However, detailed analysis of the industrial large-scale CO2 capture process is still limited in the open literatures. The motivation of this |
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