Demonstrating full-scale post-combustion CO2 capture for coal-fired power plants through dynamic modelling and simulation
Demonstrating full-scale post-combustion CO2 capture for coal-fired power plants through dynamic modelling and simulation
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DOI：
10.1016/j.fuel.2010.10.056
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发表时间：
2012-11
期刊：
影响因子：
7.4
通讯作者：
A. Lawal;Meihong Wang;P. Stephenson;O. Obi
中科院分区：
文献类型：
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作者：
A. Lawal;Meihong Wang;P. Stephenson;O. Obi
本研究旨在通过动态建模和仿真，为500MWe亚临界电厂燃烧后二氧化碳捕集的设计和运行提供见解。介绍了电厂和二氧化碳捕集厂动态模型的开发和验证过程。此外，还讨论了将二氧化碳捕集厂从中试厂规模（在那里进行了验证）扩大到全面规模的问题。随后讨论了两种植物模型的连接方式。采用浮动IP/LP交叉压力配置。在低压涡轮和排出点之间包括一个节流阀，以防止交叉处的压力低于再沸器中溶剂再生所需的水平。发电厂的烟气在送到二氧化碳捕集厂之前要经过处理。考虑了四个案例研究。第一部分研究了增加溶剂浓度对电厂与捕集装置性能的影响。第二个调查吸收器包装高度提供资本和运营成本之间的良好平衡。两个动态案例研究表明，co2捕集厂的响应速度比电厂慢。它们还揭示了二氧化碳捕获水平和发电厂输出控制回路的相互作用，使得难以快速实现稳定的功率输出水平。
This study aims to provide insights into the design and operation of full-scale post-combustion CO2capture for a 500MWe sub-critical power plant through dynamic modelling and simulation. The development and validation of the dynamic models of the power plant and CO2capture plant are described. In addition, the scale-up of the CO2capture plant from pilot plant scale (where it was validated) to full scale is discussed. Subsequently the manner in which the two plant models were linked is discussed. A floating IP/LP crossover pressure configuration is used. A throttling valve is included between the LP turbine and draw-off point to prevent pressures at the crossover from dropping below required levels in the reboiler for solvent regeneration. The flue gas from the power plant is treated before it is sent to the CO2capture plant. Four case studies are considered. The first investigates the effect of increasing solvent concentration on the performance of the power plant with the capture plant. The second investigates which absorber packing height offers a good balance between capital and operating costs. The two dynamic case studies show that the CO2capture plant has a slower response than the power plant. They also reveal an interaction of CO2capture level and power plant output control loops making it difficult to achieve steady power output levels quickly.