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Techno-Economic Analysis of a 600 MW Oxy-Enrich Pulverized Coal-Fired Boiler

Author

Listed:
  • Ming Lei

    (School of Energy and Power Engineering, North China Electric Power University, Baoding 071000, China)

  • Cen Sun

    (School of Energy and Power Engineering, North China Electric Power University, Baoding 071000, China)

  • Chunbo Wang

    (School of Energy and Power Engineering, North China Electric Power University, Baoding 071000, China)

Abstract

Oxy-fuel combustion is one of the most promising methods for CO 2 capture and storage (CCS) but the operating costs—mainly due to the need for oxygen production—usually lead to an obvious decrease in power generation efficiency. An “oxy-enrich combustion” process was proposed in this study to improve the efficiency of the oxy-fuel combustion process. The oxidizer for oxy-enrich combustion was composed of pure oxygen, air and recycled flue gas. Thus, the CO 2 concentration in the flue gas decreased to 30–40%. The PSA (pressure swing adsorption), which has been widely used for CO 2 removal from the shifting gases of ammonia synthesis in China, was applied to capture CO 2 during oxy-enrich combustion. The technological economics of oxy-enrich combustion with PSA was calculated and compared to that of oxy-fuel combustion. The results indicated that, compared with oxy-fuel combustion: (1) the oxy-enrich combustion has fewer capital and operating costs for the ASU (air separation unit) and the recycle fan; (2) there were fewer changes in the components of the flue gas in a furnace for oxy-enrich combustion between dry and wet flue gas circulation; and (3) as the volume ratio of air and oxygen was 2 or 3, the economics of oxy-enrich combustion with PSA were more advantageous.

Suggested Citation

  • Ming Lei & Cen Sun & Chunbo Wang, 2018. "Techno-Economic Analysis of a 600 MW Oxy-Enrich Pulverized Coal-Fired Boiler," Energies, MDPI, vol. 11(4), pages 1-12, March.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:4:p:768-:d:138453
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    References listed on IDEAS

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    1. Bedoić, Robert & Dorotić, Hrvoje & Schneider, Daniel Rolph & Čuček, Lidija & Ćosić, Boris & Pukšec, Tomislav & Duić, Neven, 2021. "Synergy between feedstock gate fee and power-to-gas: An energy and economic analysis of renewable methane production in a biogas plant," Renewable Energy, Elsevier, vol. 173(C), pages 12-23.
    2. Zhiyu Zhang & Rongrong Zhai & Xinwei Wang & Yongping Yang, 2020. "Sensitivity Analysis and Optimization of Operating Parameters of an Oxyfuel Combustion Power Generation System Based on Single-Factor and Orthogonal Design Methods," Energies, MDPI, vol. 13(4), pages 1-22, February.

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