電除尘器导流板角度对气流分布均匀性影响的仿真研究.doc

摘要 电除尘内气流分布均匀性是影响电除尘器效率的重要因素之一，而导流板角度对气流分布均匀性的影响又十分重要，随着新的污染物排放标准的颁布，电除尘器面临着前所未有的压力和挑战。因此，如何经济又有效地提高除尘效率，降低粉尘排放量，己成为电除尘工作者研究的热点问题。目前研究气流分布均匀性问题主要有模型试验和数值计算两种方法。 论文采用数值仿真对除尘器的主要影响因素进行了研究。采用PRO/E软件建立电除尘研究模型，并用ANSA软件对模型进行几何处理和网格划分，利用计算流体动力学软件（CFX ）中的标准k-ε模型和壁面函数法来模拟电除尘器内部流场的分布。 在对电除尘器导流板角度进行研究后我们知道了合理调整导流板角度可以有效的改善电场中气流分布的均匀程度。 关键词：电除尘器 数值仿真 导流板角度 气流分布  Abstract Uniformity of gas-flow distribution is one of important factor which influences the efficiency of electrostatic precipitators (ESP).And the angle of ESP is very important to the uniformity of gas-flow distribution. With the new emissions standards promulgated，ESP is facing unprecedented pressures. Therefore, how to economically and effectively improve the dusting efficiency and reduce dust emissions has already become a highly focused problem for researchers. At present there are two methods to solve the problem; one is model experiment, the other is numerical calculation. The major effect factors of this electric precipitator are studied with numerical simulation method. At first, use PRO/E software to build the geometry model and ANSA to do geometric cleaning up and finite element mesh. Then, based on the standard k-ε model and the wall function of the hydrodynamics software CFX，the distributions of the flow field in the electric precipitator are simulated. Arranging the guide plate reasonably on the perforated plates in the air-in smoke box of the ESP can be effective on improving the uniformity of flow distribution in electric field. After learn about the angle of ESP we can see that rationally adjust the angle of ESP can effectively improve the gas-flow distribution of the electric field. Keywords：electrostatic precipitators (ESP)；numerical simulation；the angle of ESP；the gas-flow distribution  目 录 摘要 I Abstract II 第一章 绪 论 1 1.1 引言 1 1.2 课题的目的及意义 1 1.3 电除尘器气流分布研究概况 2 1.3.1 国外概况 2 1.3.2 国内概况 3 1.4 课题的主要研究内容 4 第二章 基础理论 5 2.1 电除尘器概述 5 2.1.1 电除尘器结构简介 5 2.1.2 电除尘器工作原理 9 2.2 流