Simulation Study on Influence of Installation Height of Mist Eliminator on Liquid Holdup of Flue Gas in Desulfurization Tower

Shuangping ZHANG; Weixiong CHEN; Xibu JIA; Yuan YUAN

doi:10.12096/j.2096-4528.pgt.20039

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Simulation Study on Influence of Installation Height of Mist Eliminator on Liquid Holdup of Flue Gas in Desulfurization Tower

Power Generation and Enviromental Protection | 更新时间：2025-07-04

- Simulation Study on Influence of Installation Height of Mist Eliminator on Liquid Holdup of Flue Gas in Desulfurization Tower
- Power Generation Technology Vol. 42, Issue 2, Pages: 247-253(2021)
- 作者机构：
  
  1.大唐西北电力试验研究院, 陕西省西安市 710021
  2.动力工程多相流国家重点实验室(西安交通大学), 陕西省西安市 710049
- 作者简介：
- 基金信息：
  
  National Key Research and Development Program of China(2018YFB0604303)
- DOI：10.12096/j.2096-4528.pgt.20039
  CLC： TK09
- Received：09 June 2020，
  
  Published：30 April 2021
- 稿件说明：
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Shuangping ZHANG, Weixiong CHEN, Xibu JIA, et al. Simulation Study on Influence of Installation Height of Mist Eliminator on Liquid Holdup of Flue Gas in Desulfurization Tower[J]. Power Generation Technology, 2021, 42(2): 247-253.
DOI：

Shuangping ZHANG, Weixiong CHEN, Xibu JIA, et al. Simulation Study on Influence of Installation Height of Mist Eliminator on Liquid Holdup of Flue Gas in Desulfurization Tower[J]. Power Generation Technology, 2021, 42(2): 247-253. DOI： 10.12096/j.2096-4528.pgt.20039.

摘要

某电厂运行过程中存在周期性的除雾器阻力上升和结垢现象，造成除雾器局部坍塌。为解决这一问题，通过数值模拟方法对脱硫塔内部气液两相流场进行模拟，研究除雾器距离喷淋层高度（2.0~3.5 m）和喷淋雾化粒径（1500~2500 μm）等因素下，除雾器最下沿烟气携带喷淋液滴的情况。计算结果表明：随着除雾器距离喷淋层高度的增加，脱硫塔内部流场更趋均匀化，喷淋液滴到达除雾器的质量浓度相应降低。通过数值模拟得出了量化数据，从而为存在除雾器堵塞坍塌等类似现象的国内燃煤电厂提供诊断思路和优化依据。

Abstract

During the operation of a power plant

there is a periodic phenomenon of mist eliminator resistance rising and scaling

which results in the partial collapse of the mist eliminator. In order to solve this problem

the gas-liquid two-phase flow field in the desulfurization tower was simulated by numerical simulation method

and the condition of flue gas carrying spray droplets at the bottom of the mist eliminator was further studied

as affected by the varying heights (2.0-3.5m) from the top spray layer center to the bottom and the different misting drop sizes (1500-2500μm) of the particular nozzles. The results show that with the increase of the distance from the mist eliminator to the spray layer

the mass concentration of spray drops decreases

and the flow field inside the desulphurization tower becomes more uniform. The quantitative data were obtained by numerical simulation

which can provide a diagnostic thought and optimization basis for domestic coal-fired power plants with similar phenomena such as mist eliminator blocking and collapsing.

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references

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