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Experimental study on desulfurization efficiency and gas-liquid mass transfer in a new liquid-screen desulfurization system

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  • Sun, Zhongwei
  • Wang, Shengwei
  • Zhou, Qulan
  • Hui, Shi'en

Abstract

This paper presents a new liquid-screen gas-liquid two-phase flow pattern with discarded carbide slag as the liquid sorbent of sulfur dioxide (SO2) in a wet flue gas desulfurization (WFGD) system. On the basis of experimental data, the correlations of the desulfurization efficiency with flue gas flow rate, slurry flow rate, pH value of slurry and liquid-gas ratio were investigated. A non-dimensional empirical model was developed which correlates the mass transfer coefficient with the liquid Reynolds number, gas Reynolds number and liquid-gas ratio (L/G) based on the available experimental data. The kinetic reaction between the SO2 and the carbide slag depends on the pressure distribution in this desulfurizing tower, gas liquid flow field, flue gas component, pH value of slurry and liquid-gas ratio mainly. The transient gas-liquid mass transfer involving with chemical reaction was quantified by measuring the inlet and outlet SO2 concentrations of flue gas as well as the characteristics of the liquid-screen two-phase flow. The mass transfer model provides a necessary quantitative understanding of the hydration kinetics of sulfur dioxide in the liquid-screen flue gas desulfurization system using discarded carbide slag which is essential for the practical application.

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  • Sun, Zhongwei & Wang, Shengwei & Zhou, Qulan & Hui, Shi'en, 2010. "Experimental study on desulfurization efficiency and gas-liquid mass transfer in a new liquid-screen desulfurization system," Applied Energy, Elsevier, vol. 87(5), pages 1505-1512, May.
    • Handle: RePEc:eee:appene:v:87:y:2010:i:5:p:1505-1512
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    References listed on IDEAS

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    1. Gu, Hui & Cui, Yanfeng & Zhu, Hongxia & Xue, Rui & Si, Fengqi, 2018. "A new approach for clustering in desulfurization system based on modified framework for gypsum slurry quality monitoring," Energy, Elsevier, vol. 148(C), pages 789-801.
    2. Heidel, Barna & Hilber, Melanie & Scheffknecht, Günter, 2014. "Impact of additives for enhanced sulfur dioxide removal on re-emissions of mercury in wet flue gas desulfurization," Applied Energy, Elsevier, vol. 114(C), pages 485-491.

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