An experimental system for a fixed granular bed filter (GBF) used to filter dust particles in the industrial flue gas was built. The effects of filtration superficial velocity, bed height, and granules size on filtration and fluid flow performance were investigated. The results demonstrate that the GBF has high filtration efficiency and relatively low pressure drop, e.g. the filtration efficiency can reach 99.45% with a pressure drop of 291 Pa. The increase of filtration superficial velocity leads to the decrease of filtration efficiency but the increase of pressure drop. The filtration superficial velocity lower than 0.6 m/s is recommended to achieve higher filtration efficiency, lower pressure drop and acceptable filtration rate in the studied geometric parameter range (granule size: 3–10 mm, bed height: 30–120 mm). The increase of bed height and the decrease of granules size are beneficial to increase filtration efficiency, but detrimental to reduce the pressure drop. In addition, the effects of granules size on pressure drop are more significant than that on filtration efficiency. Based on the experimental results, the structural optimization was performed for the fixed GBF and an optimized structure with different granules sizes was designed. The validation results indicate that the designed GBF structure has excellent filtration and fluid flow performance compared with the traditional structure with single granules size. Under the investigated filtration superficial velocity region, the average filtration efficiency is enhanced 3.23% and the pressure drop is reduced 49.94%.

建立了用于固定工业烟气中灰尘颗粒的固定颗粒床过滤器（GBF）的实验系统。研究了过滤的表观速度，床高和颗粒大小对过滤和流体流动性能的影响。结果表明，GBF具有较高的过滤效率和较低的压降，例如，过滤效率可达到99.45％，压降为291 Pa。过滤表面速度的增加导致过滤效率的降低，但压力的增加降低。建议在研究的几何参数范围内（颗粒尺寸：3–10 mm，床高度：30–120 mm），将过滤表面速度低于0.6 m / s，以实现更高的过滤效率，更低的压降和可接受的过滤速率。床高的增加和颗粒尺寸的减小有利于提高过滤效率，但不利于减小压降。另外，颗粒尺寸对压降的影响比对过滤效率的影响更显着。根据实验结果，对固定GBF进行了结构优化，并设计了具有不同粒径的优化结构。验证结果表明，与传统的单颗粒尺寸结构相比，所设计的GBF结构具有出色的过滤和流体流动性能。在研究的过滤表观速度范围内，平均过滤效率提高了3.23％，压降降低了49.94％。但不利于减小压降。另外，颗粒尺寸对压降的影响比对过滤效率的影响更显着。根据实验结果，对固定GBF进行了结构优化，并设计了具有不同粒径的优化结构。验证结果表明，与传统的单颗粒尺寸结构相比，所设计的GBF结构具有出色的过滤和流体流动性能。在研究的过滤表观速度范围内，平均过滤效率提高了3.23％，压降降低了49.94％。但不利于减小压降。另外，颗粒尺寸对压降的影响比对过滤效率的影响更显着。根据实验结果，对固定GBF进行了结构优化，并设计了具有不同粒径的优化结构。验证结果表明，与传统的单颗粒尺寸结构相比，所设计的GBF结构具有出色的过滤和流体流动性能。在研究的过滤表观速度范围内，平均过滤效率提高了3.23％，压降降低了49.94％。对固定GBF进行了结构优化，并设计了具有不同粒径的优化结构。验证结果表明，与传统的单颗粒尺寸结构相比，所设计的GBF结构具有出色的过滤和流体流动性能。在研究的过滤表观速度范围内，平均过滤效率提高了3.23％，压降降低了49.94％。对固定GBF进行了结构优化，并设计了具有不同粒径的优化结构。验证结果表明，与传统的单颗粒尺寸结构相比，所设计的GBF结构具有出色的过滤和流体流动性能。在研究的过滤表观速度范围内，平均过滤效率提高了3.23％，压降降低了49.94％。