Porous Medium Filter Bag Structure of Metal Dust Filter Based on Flow Distribution Optimization
To address the issue of premature damage to some filter bags in the process of filtering metal dust in a dust collector due to unstable flow field distribution and uneven filtering effects,Fluent software was used to simulate the impact of different lengths and diameters of filter bags on the flow field distribution inside the dust collector during bag cleaning.By ana-lyzing and comparing the average wind speed on the surface of the filter bags,it was determined that the uniformity of the flow field inside the dust collector was better when length was 1 000 mm and diameter was 150 mm of filter bag.Evaluation criteria such as filter outlet filtering wind speed and maximum flow coefficient were used to simulate the filtering process under different dust thicknesses on the surface of the filter bags,determining the distribution of filtering flow and the uniformity of airflow for each filter bag.For filter bags with poor evaluation results,four optimization solutions involving different filter materials were proposed.By comparing the surface wind speed characteristics and flow distribution uniformity of each filter bag in the optimi-zation solutions,it was found that optimizing two filter bags at the inlet with sintered metal wire mesh and the filter bag directly below the outlet with metal fiber felt,while using the original filter material for the remaining bags,was the best solution.This optimization reduced the maximum flow coefficient and comprehensive flow coefficient unevenness by 92.19%and 92.05%re-spectively,indicating more consistent filtering flow distribution for each filter bag,resulting in a more uniform and stable airflow distribution inside the dust collector.The optimized porous medium filter bag structure can better maintain uniform filter bag life and facilitate regular maintenance and overall replacement of filter bags for the enterprise.
metal dust filternumerical simulationflow distributionfilter bag optimization
NETL
NSTL
万方数据
