Huadian Technology ›› 2021, Vol. 43 ›› Issue (6): 69-78.doi: 10.3969/j.issn.1674-1951.2021.06.009

• Carbon Sequestration and Utilization • Previous Articles     Next Articles

Research on operation optimization of a 10 000 t/a carbon capture project for coal-fired power plants

SUN Luchang1(), WANG Zhengrong1, WU Chong1, WANG Kailiang1, ZHANG Shiming2, HAN Wenquan2   

  1. 1. China Huadian Engineering Company Limited,Beijing 100070,China
    2. Jiangsu Jurong Power Generation Company Limited,Zhenjiang 212000,China
  • Received:2021-05-20 Revised:2021-06-06 Online:2021-06-25 Published:2021-06-25

Abstract:

In order to test the application result of carbon capture,utilization and storage(CCUS) technology in coal-fired boilers,a 10 000 t/a carbon capture demonstration project was designed and built for a power plant.A technical path including organic amine absorption,compression and refinery is selected through comparison,and its process and main equipment selection are discussed.After long-term operation test since the start-up of the demonstration project,the influences of absorbent flow,flue gas flow and regenerate temperature on capture efficiency,capture capacity,steam consumption and electricity consumption of the carbon capture system have been studied.The optimum operational parameters are obtained from the analysis on the influence factors,which are the flue gas flow kept at 6 000~7 000 m3/h,the absorbent circulation flow kept at 3 400~3 700 kg/h and the regeneration temperature maintained at 108.5~109.0 ℃.Keeping the parameters within the optimum ranges above,the system is of a capture efficiency higher than 90%,a carbon capture capacity above 1.39 t/h,an average electricity consumption of 312 (kW·h)/t CO2 and an average regeneration heat rate of 3.05 GJ/t CO2.The energy consumption of the system is about 23% lower than that of the traditional capture system taking 30% MEA.Finally,the operation cost and its composition are calculated.The study offers solid data for the design and equipment selection of similar carbon capture projects.

Key words: carbon dioxide, carbon capture, CCUS, organic amine, operational optimization, carbon peak, carbon neutrality

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