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

机译：新型液筛脱硫系统脱硫效率及气液传质的实验研究

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摘要

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.
机译：本文提出了一种以废弃电石渣作为湿法烟气脱硫（WFGD）系统中的二氧化硫（SO2）的液体吸附剂的新型液筛气液两相流型。在实验数据的基础上，研究了脱硫效率与烟气流量，料浆流量，料浆pH值和液气比的关系。建立了一个无量纲的经验模型，根据现有的实验数据将传质系数与液体雷诺数，气体雷诺数和液气比（L / G）联系起来。 SO 2和碳化物炉渣之间的动力学反应主要取决于该脱硫塔中的压力分布，气液流场，烟气成分，浆液的pH值和液气比。通过测量烟道气的进口和出口SO2浓度以及液屏两相流的特性，可以定量分析涉及化学反应的瞬时气液传质。传质模型提供了使用废弃的碳化炉渣的液筛烟气脱硫系统中二氧化硫水化动力学的必要定量理解，这对实际应用至关重要。

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  • 作者

    Sun Z; Wang S; Zhou Q; Hui S;

  • 作者单位
  • 年度 2010
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  • 原文格式 PDF
  • 正文语种 eng
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