负离子除尘技术在隧道中的应用与数值模拟研究
Application and numerical simulation of negative ion dust removaltechnology in tunnels
摘要：
以武隆隧道为例,采用便携式负离子发生器进行现场测试,验证了负离子的消耗与除尘的有效性。对武隆隧道中应用负离子净化系统的除尘效果进行了数值模拟。结果表明:隧道内的电场以电极为中心呈环形分布且向外不断扩展;随着粉尘颗粒粒径的增大,荷电量增大,在电场力的作用下粉尘颗粒越容易发生偏移运动;在作用时间为600 s时,对2.5 μm与10 μm粉尘的除尘率分别为63.57%与99.00%;增大工作电压可以有效提高除尘率。
Abstract：
Taking the Wulong Tunnel as an example, a portable negative ion generator is used for field testing to verify the consumption of negative ions and the effectiveness of dust removal. This study simulates the dust removal effect of the negative ion purification system applied to the Wulong Tunnel. The results show that the electric field in the tunnel is distributed in a ring shape with the electrode as the center and continues to expand outward. As the particle size of the dust particles increases, the charge quantity increases, and the dust particles are more likely to deviate under the action of the electric field force. When the action time is 600 s, the removal rates for the dust with particle sizes of 2.5 μm and 10 μm are 63.57% and 99.00%, respectively. Increasing the working voltage can effectively improve the dust removal rate.
Keywords:tunnel construction; negative ion; dust removal; dust removal rate; dust; electric field; working voltage