1000MW级机组电袋复合除尘特性三维数值模拟研究  

Three-dimensional Numerical Simulation of Collection Properties of a 1 000 MW Electrostatic-fabric Integrated Precipitator

作　　者：孙超凡[1] 彭泽宏 郑华昌 陈奎续 楼波[2] 龙新峰[2] 

机构地区：[1]广东电网公司电力科学研究院,广东省广州市510080 [2]华南理工大学,广东省广州市510641 [3]福建龙净环保股份有限公司,福建省龙岩市364000

出　　处：《中国电机工程学报》2015年第20期5258-5264,共7页Proceedings of the CSEE

基　　金：中国南方电网公司重点研发基金项目(K-GD2012-365)~~

摘　　要：利用计算流体软件Fluent 6.3,基于标准的κ-ε双方程湍流模型对国内某电厂一台1 000 MW机组的电袋复合除尘器进行三维数值模拟,数值模拟的结果与现场实际情况吻合较好,验证了数值模拟结果的有效性。主要研究了烟气量、压降以及粉尘比电阻3个因素对电袋复合除尘器的除尘效率的影响作用。主要结论有:除尘效率随着烟气量的增加而降低。为了保证较高的除尘效率与滤袋的使用寿命,单台电袋复合除尘器合适的烟气处理量不应超过2 300 km3/h。除尘效率随着压降的增加而升高。1 100 Pa左右是合适的压降范围。除尘效率随着粉尘比电阻增大而降低。对于高比电阻的粉尘收集,应使比电阻越低越好,亦即应使温度尽可能降低些,126℃左右为合适的温度范围。Models of a 1 000 MW electrostatic-fabric integrated precipitator （EFIP） were simulated by fluid numerical simulation software based on the standard κ-ε two-equation turbulence model. The results of numerical simulation matched well with experimental data, which proved the effectiveness of the numerical simulation results. The impacts of gas volume, pressure drop and ratio resistance were studied on the dust removal efficiency. The main conclusions were as follows： the dust removal efficiency decreased with the increase of the amount of flue gas emission. In order to ensure the collection efficiency and high service life of the filter-bags, it is suggested that the flue gas volume of a single precipitator should not exceed 2 300 km^3/h. Dust removal efficiency increased with the increase of the pressure drop. Pressure drop range should be about 1 100 Pa. Dust removal efficiency decreased with the increase of the ratio resistance of the dust. For the collection of dusts of high ratio resistance, the ratio resistance should be as low as possible. In other words, it is better to make the temperature as low as possible. 126 ℃ around is the optimum temperature range.

关 键 词：电袋复合除尘(EFIP) 除尘效率 比电阻 数值 模拟 

分 类 号：TM621[电气工程—电力系统及自动化] X513[环境科学与工程—环境工程]