摘要
以某电厂600 MW机组电袋复合除尘器为研究对象,使用Pro/E软件,建立了3D模型,采用数值分析方法,重点研究了大型电袋复合除尘器内部的流场分布。模拟过程中,设定布袋的界面为多孔介质阶跃边界条件,电除尘器内部的气流通过改变气流分布板来调整。模拟结果显示,气流分布板设置与否、设置数量及开孔率对电除尘区速度分布有较大影响;在电除尘区的气流分布均匀性最佳时,电除尘区气流平均速度为0.78 m/s,相对均方根为0.279 9,布袋除尘区速度为0.6 m/s;在第3层气流分布板上改进开孔孔径,可有效解决电除尘区第1组灰斗内的涡流现象,从而可提高除尘效率。
Through the study on the EFP of the 600-MW unit in a power plant,a 3-D model is established with the Pro/E software and the airflow distribution of the EFP is calculated with numerical simulation method.In the simulation,the bag surface is set as the porous-jump boundary condition and the airflow in the EFP can be adjusted by altering the deflectors.The simulation results show that the airflow distribution is affected by the number and opening ratio of the airflow deflectors.In the most even airflow distribution,the average airflow speed in the electrostatic area is 0.78 m/s with the Relative Root-Mean-Square Error （RRMSE） of 0.279 9.The airflow velocity in the fabrics is 0.6 m/s.The eddy current in the electrostatic area is reduced by modifying the diameter of the holes in the third deflector,which can improve the efficiency of dust removal.
出处
《中国电力》
CSCD
北大核心
2013年第10期140-145,共6页
Electric Power
基金
中国南方电网公司科技研发资助项目(K-GD2012-365)
关键词
电袋复合除尘器
气流分布
数值模拟
气流分布板
electrostatic fabric precipitator
airflow distribution
numerical simulation
airflow deflector
