The synergetic removal of multiple pollutants in flue gas was investigated in a gas–liquid flow pattern-controlling (FPC) column coupled with ultrasonic wave (UW). A pilot-scale experimental setup with a gas flow rate of up to ∼432 m³/h was developed for the removal of SO₂, SO₃, and fly ash. A comparative study was conducted between the FPC column and the traditional open spraying (OS) column to show the superiority of the FPC column. In general, the synergetic purification performance was significantly improved by using the FPC and UW. The SO₃ aerosol removal efficiency in the FPC column was about 9.9% higher than that in the OS column. At a liquid-to-gas ratio (L/G) of 10 L/Nm³, the efficiency of SO₂, SO₃, and fly ash particle removal increased by 8.7, 5.3, and 6.6% with the introduction of UW, respectively. This enhancement effect of the UW became greater with increasing the L/G due to the increased liquid holdup. Furthermore, the energy consumption analysis was applied based on an actual WFGD system of a 660 MW power plant to estimate the energy penalty of the FPC and FPC-UW columns.

中文翻译：

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超声耦合气液流控制塔中SO ₃，SO ₂和颗粒物协同脱除的实验研究

在结合超声波（UW）的气液流模式控制（FPC）色谱柱中研究了协同去除烟气中多种污染物的方法。开发了一种中试规模的实验装置，其气体流速高达〜432 m ³ / h，用于去除SO ₂，SO ₃和粉煤灰。在FPC色谱柱和传统的开放式喷雾（OS）色谱柱之间进行了比较研究，以显示FPC色谱柱的优越性。通常，通过使用FPC和UW可以显着提高协同纯化性能。FPC色谱柱中的SO ₃气雾去除效率比OS色谱柱中的SO ₃气雾去除效率高约9.9％。在液/气比（L / G）为10 L / Nm ^3时，SO的效率随着UW的引入，SO ₂和SO ₃和粉煤灰颗粒去除分别增加了8.7％，5.3％和6.6％。由于增加的液体滞留率，U / W的增强效果随着L / G的增加而变得更大。此外，基于660 MW电厂的实际WFGD系统应用能耗分析，以估算FPC和FPC-UW色谱柱的能耗。