The deflector and the rod bank are commonly used to optimize flue gas distribution in the original spray tower (OST) of a wet flue gas desulfurization system (WFGD). In this paper, the internal optimization mechanism of the deflector desulfurization spray tower (DST) and the rod bank desulfurization spray tower (RBST) are studied. Based on the Euler–Lagrange method, the standard k-ε turbulence model, an SO₂ absorption model and a porous media model, the numerical simulation of the desulfurization spray tower is carried out with the verification of the model rationality. The results show that there are gas-liquid contact intensification effects in DST and RBST. Compared with OST, gas-liquid contact intensification enhances the heat and mass transfer effects of DST and RBST. The temperature difference between inlet and outlet of flue gas increased by 3.3 K and the desulfurization efficiency of DST increased by 1.8%; the pressure drop decreased by 37 Pa. In RBST, the temperature difference between the flue gas inlet and outlet increased by 5.3 K and the desulfurization efficiency increased by 3.6%; the pressure drop increased by 33 Pa.

中文翻译：

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气液接触强化对导流板和棒束脱硫喷塔传热传质的影响

导流板和棒束通常用于优化湿式烟气脱硫系统 (WFGD) 的原始喷淋塔 (OST) 中的烟气分布。本文研究了导流板脱硫喷淋塔(DST)和棒束脱硫喷淋塔(RBST)的内部优化机理。基于欧拉-拉格朗日方法、标准k-ε湍流模型、SO ₂吸收模型和多孔介质模型，对脱硫喷淋塔进行数值模拟，验证模型的合理性。结果表明，DST和RBST存在气液接触强化效应。与OST相比，气液接触强化增强了DST和RBST的传热传质效果。烟气进出口温差增加3.3K，DST脱硫效率提高1.8%；压降降低37 Pa。RBST中，烟气进出口温差增加5.3 K，脱硫效率提高3.6%；压降增加了 33 Pa。