Control strategy optimization for wet flue gas desulfurization system during load cycling dynamic processes: Energy saving and environmental impact

Wei Gao, Ming Liu, Haozhe Xin, Yongliang Zhao, Chaoyang Wang and Junjie Yan

Energy, 2024, vol. 303, issue C

Abstract: To accommodate high penetration of fluctuating renewable power within the power grid, thermal power plants often engage in load cycling dynamic processes. When thermal power plants operate under low loads and load cycling dynamic processes, large ratio of auxiliary power is consumed in wet flue gas desulfurization (WFGD) system, because the slurry flowrate cannot be regulated appropriately. In this study, dynamic models of SO2 generation and WFGD system were developed, and coupled with the dynamic model of a thermal power plant. An optimization control strategy for slurry pumps under fixed-speed mode was presented. Then, model to determine the optimal slurry flowrates with changing parameters of flue gas and slurry was derived, and a control strategy to regulate inverter slurry pumps was proposed. The auxiliary power consumption during load cycling dynamic processes decreases significantly with optimization control strategies, although the cumulative SO2 emissions increases. When the control strategy optimization for slurry pumps under fixed-speed mode was implemented, the energy-saving potential is 19.00%, 20.39%, 22.06% and 23.05% during load decreasing processes under load cycling rate of 0.5%, 1.0%, 1.5%, and 2.0% Pe0 min−1, and that value under the control strategy to regulate inverter slurry pumps is 33.20%, 34.45%, 35.04% and 37.07%, respectively.

Keywords: Wet flue gas desulfurization; Control strategy; Energy saving; Environmental impact; Thermal power plants (search for similar items in EconPapers)
Date: 2024
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544224016827
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:303:y:2024:i:c:s0360544224016827

DOI: 10.1016/j.energy.2024.131909

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

More articles in Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().