静电除尘器飞灰颗粒除尘特性的数值研究  

Numerical Study on the Removal Characteristics of Fly Ash Particles in Electrostatic Precipitator

作　　者：王为术[1] 张春杰[1] 王鑫[1] 郑梦星 

机构地区：[1]华北水利水电大学热能工程研究中心,郑州450011

出　　处：《科学技术与工程》2017年第23期195-200,共6页Science Technology and Engineering

基　　金：国家重点研发计划(2016YFB0601404)资助

摘　　要：针对350 MW超临界热电机组静电除尘飞灰颗粒除尘系统,基于FLUENT软件,采用κ-ε双方程湍流模型,三维数值研究飞灰颗粒的除尘特性。研究了粉尘比电阻、颗粒粒径、流速以及电压对静电除尘器除尘效率的影响规律。研究结果表明:除尘器飞灰颗粒收尘效率随比电阻的增大而减小;放电电压、颗粒粒径和烟气流速对静电除尘器的影响很明显。收尘效率随放电电压提高而增大;颗粒粒径越大,收尘效率越高;降低烟气流速,提高颗粒物的收尘效率。研究结果可为电站飞灰粉尘超净排放技术改善提供依据和方法。The 3D removal characteristics of fly ash particles was numerical study by FLUNET based on the κ-εturbulence model in electrostatic precipitator（ ESP） fly ash particles removal system of 350 MW supercritical thermal power units. The impacts of the dust ratio resistance,particle size,velocity and voltage were studied on the dust removal efficiency. The results show that dust removal efficiency decreases with the increase of the ratio resistance of the dust. The influence of discharge voltage,particle diameter and gas flow rate on the electrostatic precipitator is obvious. Dust collection efficiency increases with the increase of the discharge voltage. Dust collection efficiency increase with the increase of the particle diameter. Dust collection efficiency increases with the decrease of the gas flow rate. The results of the study can offer basis and method to the improvement of the ultraclean emissions technology of the power plant fly ash dust.

关 键 词：静电除尘器 除尘效率 粉尘比电阻 数值研究 

分 类 号：TM621.9[电气工程—电力系统及自动化]