Numerical simulation and structure optimization for inlet and outlet duct of electrostatic precipitator in a 1000MW unit

LI Wanwan; LIU Liping; JIA Yan; CUI Hao; HU Guoming

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Numerical simulation and structure optimization for inlet and outlet duct of electrostatic precipitator in a 1000MW unit

Thermal Power Generation Vol. 45, Issue 9, Pages: 15-22(2016)

更新时间：2025-09-28

- Numerical simulation and structure optimization for inlet and outlet duct of electrostatic precipitator in a 1000MW unit
- 作者机构：
  
  1. 武汉大学动力与机械学院
  2. 武汉大学图学与数字技术系
  3. 中国电力工程顾问集团中南电力设计院有限公司
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM621.2
- Published：2016
- 稿件说明：
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LI Wanwan, LIU Liping, JIA Yan, et al. Numerical simulation and structure optimization for inlet and outlet duct of electrostatic precipitator in a 1000MW unit[J]. Thermal Power Generation, 2016, 45(9): 15-22.
DOI：

LI Wanwan, LIU Liping, JIA Yan, et al. Numerical simulation and structure optimization for inlet and outlet duct of electrostatic precipitator in a 1000MW unit[J]. Thermal Power Generation, 2016, 45(9): 15-22. DOI：

摘要

以某1 000 MW机组锅炉烟气系统为研究对象

采用计算流体力学(CFD)软件对电除尘器前后烟道流动和阻力特性进行了数值模拟

分析了烟气流量分布不均和管路阻力较大的原因

提出了除尘器前烟道采用三通道同时分流与导流板结合

除尘器后烟道采用缓转弯头和外削角急转弯头组合的优化方案

并对优化后除尘器前后烟道流动和阻力特性进行了模拟计算。结果表明:CFD计算结果与实际情况吻合较好

数值模拟结果可用于指导烟风管道的结构优化;优化后

除尘器前后烟道内涡流和偏流区域减小

除尘器的各分支烟气流量均匀

管道阻力降低明显

节能效果显著。

Abstract

Taking the flue gas system in a 1 000 MW unit boiler as the research object

numerical simulation on flow behavior and resistance properties of the electrostatic precipitator inlet and outlet duct were carried out by using the computational fluid dynamics(CFD)software.The reasons for high pipe resistance and inlet flow misdistribution were investigated

and the structure optimization design scheme for the flue duct was put forward.Moreover

the flue flow and resistance characteristics of the flue duct before and after structure optimization was well calculated.It shows that the calculated results were in good agreement with the actual situation

indicating the numerical simulation was available for guiding structure optimization of smoke wind pipes.After optimization

the deflection of the air flow direction and the dust vortex was obviously decreased

the gas flow uniformity in each branch was improved

and the pipeline resistance was reduced.This pipeline optimization offers some references to the smoke duct structure design and energy saving of large power plants.

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