Oil Separator with Dual Filter Layers for Mist Capture

The filter element is divided into multiple independent filtering layers with different mesh sizes. The first layer (coarse filter) captures larger oil droplets and foam, while the second layer (fine filter) captures oil mist generated by foam rupture. This segmentation allows each layer to specialize in capturing different sizes of oil particles, significantly improving the overall oil removal rate without creating a overly complex device structure.

Different regions of the filter element have different filtering characteristics. The outer surface area is designed with specific mesh size and filtration properties to handle foam and large droplets, while inner regions or subsequent layers have different properties optimized for capturing oil mist. This local differentiation of filtering quality enables efficient multi-stage separation within a single integrated element.

The filtering function is segmented across multiple layers with progressively finer mesh sizes. The first layer uses a coarser mesh that maintains high air permeability for bulk gas flow, while the second layer uses a finer mesh optimized for capturing oil mist. This segmentation allows the system to achieve effective oil mist removal without significantly compromising overall gas flow rate, as each layer handles a specific size range of particles.

The filtering approach transitions from relying on a single mesh size dimension to using multiple filtering dimensions (coarse then fine). This multi-dimensional filtering strategy enables the system to capture oil mist effectively while maintaining adequate air permeability, as the cumulative effect of sequential filtering layers provides both high removal efficiency and acceptable flow characteristics.