Numerical modeling and optimal design of flow field for a wet electrostatic precipitator system

MA Xiuyuan; SHEN Zhiyong; LI Zhiqiang

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Numerical modeling and optimal design of flow field for a wet electrostatic precipitator system

Thermal Power Generation Vol. 45, Issue 5, Pages: 94-99(2016)

更新时间：2025-09-28

- Numerical modeling and optimal design of flow field for a wet electrostatic precipitator system
- 作者机构：
  
  国电环境保护研究院
- 作者简介：
- 基金信息：
- DOI：
  CLC： X773
- Published：2016
- 稿件说明：
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MA Xiuyuan, SHEN Zhiyong, LI Zhiqiang. Numerical modeling and optimal design of flow field for a wet electrostatic precipitator system[J]. Thermal Power Generation, 2016, 45(5): 94-99.
DOI：

MA Xiuyuan, SHEN Zhiyong, LI Zhiqiang. Numerical modeling and optimal design of flow field for a wet electrostatic precipitator system[J]. Thermal Power Generation, 2016, 45(5): 94-99. DOI：

摘要

为优化某330MW机组燃煤锅炉烟气湿式静电除尘系统的流场

设计了5种导流装置布置方案

采用计算流体动力学(CFD)数值模拟方法

研究不同方案下收尘模块进口截面烟气流场的分布特性。结果表明:整流格栅具有减小流线夹角实现烟气整流的作用;调节多孔板的开孔率

可以改善电场流量的分配特性;在进口喇叭中间位置设置多孔板、在装置本体顶端设置整流格栅及在整流格栅上部铺设多孔板为最佳导流布置方案

采用此方案收尘模块进口烟气流场气流均布系数为0.138

明显低于设计要求(0.25)。

Abstract

In order to optimize the flow field distribution in wet electrostatic precipitator system for a pulverized coal-fired 330 MW unit boiler

five arrangement schemes for baffle plates have been designed.The computational fluid dynamics(CFD)method was applied to carry out numerical investigation on distribution characteristics of the flow field in flue gas inlet cross section

in different baffle plate arrangement schemes.The results show that

the gas straightening gratings could decrease the angle between the gas velocity and the vertical direction.The flue gas flow in different electric fields could be changed via altering the screen porosity of perforated screens.The scheme in which the perforated screens are installed at the inlet duct and the gas straightening gratings with perforated screens are installed on the top of the device ontology is the optimal one.In this optimal baffle plate arrangement scheme

the relative standard deviation of the flue gas velocity at the inlet section of the collecting plates is 0.138

which is superior to that of the design requirements(0.25).

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