织物过滤法
Fabric filtration
油烟废气首先经过一定数目的金属格栅，大颗粒污染物被阻截；然后经过纤维垫等滤料后，颗粒物由于被扩散、截留而被脱除。通常选用的滤料材料为吸油性能高的高分子复合材料。这种设备投资少、运行费用低、无二次污染、维修管理方便；但阻力大、占地大、需要经常更换滤料的缺点。净化效率一般在80~92%。
The oil fume first passes through a certain number of metal grids, and the large particle pollutants are blocked; then, after passing through filter materials such as fiber mats, the particles are removed due to diffusion and interception. The commonly used filter material is polymer composite material with high oil absorption performance. This kind of equipment has the advantages of less investment, low operation cost, no secondary pollution, convenient maintenance and management, but it has the disadvantages of large resistance, large land occupation and frequent replacement of filter materials. The purification efficiency is generally 80-92%.
缺点：由于滤料阻力很大，如玻璃纤维滤料的净化器压降可达1500Pa，且滤料需经常更换，使过滤法净化设备的应用受到局限。
Disadvantages: due to the great resistance of filter material, such as the pressure drop of the purifier of glass fiber filter material can reach 1500pa, and the filter material needs to be replaced frequently, which limits the application of filter method purification equipment.