直通式下进风袋式除尘器内流场均匀性研究

Uniformity Study of Internal Flow Field of Bag Filter with Straightthrough Low Entry

针对直通式下进进风袋式除尘器在实际运行过程中,气流分布不均匀,滤袋使用寿命短的问题,采用CFD软件模拟分析在不同过滤速度(0.5 m/min、0.8 m/min、1.0 m/min、1.2 m/min、1.5 m/min)下袋式除尘器内气流分布和各滤袋气流分配情况。结果表明,过滤速度的增大会加剧入口处的射流作用,导致气流分布更为不均匀;后排滤袋过滤气体量过多,加速了滤袋破损;靠近壁面的外排滤袋处理气体流量总大于内排滤袋。模拟结果对进一步的优化设计有一定参考价值。

For the problem of uneven air flow distribution and short service life of filter bag in the Actual operating process of bag filter with straight-through low entry, CFD software was used to simulate and analyze the air flow distribution and gas flow in each filter-bag under different filtration rate （0.5 m/min,0.8 m/min, 1.0 m/min, 1.2 m/min,1.5 m/min） the results showed that The increase of filtration velocity could aggravate jet flow beside the entrance and make air flow distribution more uneven. The gas amount of rear filter bag filtered is too much, the breakage of rear filter bag was accelerated. The gas amount of the filter bag close to the wall was always much than those close to the plane of symmetry, the simulation result may be a reference far the design of a bag-type collector.