Filtering and Filter Cleaning
First, during the filtering stage, particulates (shown in orange) in an upwardly-flowing fluid (blue) are trapped in a compacted layer of granular material. Second, during a short cleaning stage, the layer of granular material is loosened and the particulates are released and directed toward a disposal space.
Particulates are released and flow to disposal when the granular material of the filtering layer is loosened. Loosening the filtering layer can be achieved by several methods:
- Increasing the flow rate of the flowing fluid.
- Releasing air bubbles into the flowing fluid.
- Applying mechanical force by vibrating the filtering device.
- Applying a fluctuating electromagnetic field to a filtering layer that is attracted to magnets.