Ning Liwei, Wang Nan, Fu Jun, Ma Yi, Gu Shuo, Cheng Milan
College of Mechanical and Engineering, Shaoyang University, Shaoyang 422000, China.
Key Laboratory of Hunan Province for Efficient Power System and Intelligent Manufacturing, Shaoyang University, Shaoyang 422000, China.
ACS Omega. 2024 Aug 20;9(35):37396-37407. doi: 10.1021/acsomega.4c06500. eCollection 2024 Sep 3.
To investigate the effect of changes in the dust collector structure on the flow field and electric field distribution resulting from the secondary flow generated by the corona discharge in the collector coupled with the main flow and to improve the dust collection efficiency of the ESP, a folding plate design has been adopted. A multiphysics-coupled corona discharge and flow field numerical model was analyzed to analyze the internal flow and electric field characteristics of linear flat plates and folded plates with three different pole configurations. The study indicates that the dust collecting plate's structure significantly affects the dust collector's internal flow field and electric field distribution within the dust collector. The near-plate electric field and flow field inside the folded plate type are superior to those of the linear flat electrostatic precipitator. With the augmentation of the inlet velocity, the ionic wind disturbance on the flow field inside the electrostatic precipitator channel gradually decreases. Additionally, the folding plate has a certain inhibitory effect on the influence of the ionic wind. At an inlet velocity of 0.5 m/s, the speed near the folding plate is approximately 20% lower than that of the traditional linear flat plate. The folding plate can effectively reduce the flow velocity near the dust collection plate, thereby reducing the occurrence of particle re-entrainment and improving dust removal efficiency. By comparing the speed at the center line of the plate and near the plate, it is obvious that the speed of model B decreases significantly, and as the number of discharge electrodes increases, the speed decreases more obviously. At the same time, when the dust collection efficiency of the two models was compared, it was found that the working efficiency of the B model has been significantly improved, among which the B model has the best dust collection effect.
为了研究集尘器结构变化对由集尘器中电晕放电产生的二次流与主流耦合所导致的流场和电场分布的影响，并提高电除尘器的除尘效率，采用了折板设计。分析了一个多物理场耦合的电晕放电和流场数值模型，以分析具有三种不同极配置的线性平板和折板的内部流动和电场特性。研究表明，集尘板的结构显著影响集尘器内部的流场和电场分布。折板式内部的近板电场和流场优于线性平板静电除尘器。随着入口速度的增大，电晕风对电除尘器通道内流场的干扰逐渐减小。此外，折板对电晕风的影响有一定的抑制作用。在入口速度为0.5 m/s时，折板附近的速度比传统线性平板低约20%。折板可以有效降低集尘板附近的流速，从而减少颗粒再夹带的发生并提高除尘效率。通过比较板中心线处和板附近的速度，明显发现B模型的速度显著降低，并且随着放电电极数量的增加，速度降低得更明显。同时，比较两种模型的除尘效率时，发现B模型的工作效率有显著提高，其中B模型的除尘效果最佳。
