Wet flue gas desulfurization performance of 330 MW coal-fired power unit based on computational fluid dynamics region identification of flow pattern and transfer process

Jiangyuan Qu; Nana Qi; Kai Zhang; Lifeng Li; Pengcheng Wang

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Wet flue gas desulfurization performance of 330 MW coal-fired power unit based on computational fluid dynamics region identification of flow pattern and transfer process

Fluid Dynamics and Transport Phenomena | Updated：2026-01-06

- Wet flue gas desulfurization performance of 330 MW coal-fired power unit based on computational fluid dynamics region identification of flow pattern and transfer process
- Chinese Journal of Chemical Engineering Vol. 29, Issue 1, Pages: 13-26(2021)
- Affiliations：
  
  1. Beijing Key Laboratory of Emission Surveillance and Control for Thermal Power Generation, North China Electric Power University,Beijing,China,102206
  2. Key Laboratory of Power Station Energy Transfer Conversion and System(North China Electric Power University), Ministry of Education,Beijing,China,102206
  3. Shanxi Hepo Power Generation Company Limited,Yangquan,China,045011
- Author bio：
- Funds：
- DOI：
  CLC：
- Published：2021
- Accepted：
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Jiangyuan Qu, Nana Qi, Kai Zhang, Lifeng Li, Pengcheng Wang. Wet flue gas desulfurization performance of 330 MW coal-fired power unit based on computational fluid dynamics region identification of flow pattern and transfer process[J]. Chinese Journal of Chemical Engineering, 2021, 29(1): 13-26.
DOI：

Jiangyuan Qu, Nana Qi, Kai Zhang, Lifeng Li, Pengcheng Wang. Wet flue gas desulfurization performance of 330 MW coal-fired power unit based on computational fluid dynamics region identification of flow pattern and transfer process[J]. Chinese Journal of Chemical Engineering, 2021, 29(1): 13-26. DOI：

摘要

Abstract

Wet Flue Gas Desulfurization (WFGD) unit based upon spray scrubber has been widely employed to control SO

emissions from flue gas in coal-fired power plant. To clarify the dependence of desulfurization performance on inter-phase transfer behaviors with non-ideal contacting patterns of flue gas and slurry droplets

three regions in spray scrubber are distinguished in terms of gas-slurry flow structures using CFD method in the Eulerian-Lagrangian framework. A comprehensive model is established by involving the transfer process between two phases and chemical reactions in aqueous phase

which is validated with the measured data from a WFGD scrubber of 330 MW coal-fired power unit. Numerical results show that the overall uniformity degree of flue gas in whole scrubber is largely determined by the force-balanced droplets in the middle part of scrubber

which is dominated by counter-current mode. Both momentum transfer behavior and SO

chemical absorption process present the synchronicity with the evolution of gas-slurry flow pattern

whilst the heat transfer together with H

O evaporat

ion has little effect on overall absorption process. Three regions are firstly defined as Gas Inlet Region (GIR)

Dominant Absorption Region (DAR) and Slurry Dispersed Region (SDR) from the bottom to top of scrubber. SO

is mainly scrubbed in DAR

which provides much more intensive interaction between two phases compared to GIR or SDR. A better understanding of the desulfurization process is obtained from the fundamental relationship between transport phenomena and chemical reactions based upon the complicated hydrodynamics of gas-slurry two-phase flow

which should be useful for designing and optimizing the scrubber in coal-fired power unit.

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