Two-stage filter

The invention provides a two-stage filter. According to the double-stage filter, the mixed liquid can be filtered for multiple times through the single tank body, so that the filtering effect of the single filter on the mixed liquid can be effectively improved, the filtering cost of the mixed liquid is further reduced, and compared with an existing multi-stage filtering mode formed by connecting a plurality of filters in series, the filtering efficiency of the double-stage filter is improved. The occupied space of the whole filtering equipment can be effectively reduced, so that the consumption of required cleaning liquid can be effectively reduced when the filtering equipment is cleaned. 本发明提供了一种双级过滤器。由于本申请的单个罐体能够对混合液进行多次过滤，因此，本申请的双级过滤器能够有效提升了单个过滤器对混合液的过滤效果，进而降低对混合液体的过滤成本，并相对现有多个过滤器串联所形成的多级过滤方式，能够有效降低整体过滤设备占用空间，进而在对过滤设备清洗时，能够有效降低所需的清洗液消耗量。