Rotating Mechanical Cage

An important aspect of filter cleaning performance is fabric acceleration. How much of an impact to the fabric does the cleaning method provide? Below is a video of a baghouse filter with a dust cake that the current cleaning method, Pulse Jet, wasn't able to remove. See what happens when a different force acts on the fabric.




A unique feature of the mechanical cage is the wide range of adjustments that can be made to the acceleration of the bag in both directions. Impacting the concave nature of a bag sucked tight against the vertical risers sending it in the opposite direction. In the next instant, actuating the cage in the reverse motion to pull the bag back to steady state position.



Another feature not available in pulse jet systems is the option to actuate the cage as frequently as desired all the way up continuous motion. The rotating of the cage does not take away from the desire air flow.



International Patent Pending technology

This short video is illustrating a helix designed spiral cage rotating around a stationary cage. It is designed to accomplish the same bulge effect traveling down the length of the bag as the pulse of air moving the bag away from the built up material. The tension of the bag on the cage is derived from two different things. First is the pull or suction of the baghouse blower pulling the air through the bag. As the filter resists the direction of airflow it gets pulled tight against the cage. Second is the design of the cage. Depending on the size of bulge desired the relationship of the fixed cage to rotating cage can be set. For example a middle of the road bulge for a 4.5" filter bag would have a fixed cage to rotating cage diameter ratio of 1:1. Meaning The OD of both cages are the same diameter. The characteristics of the bulge changes when this ratio is changed.

In this video of a cage with a filter you can see both of the effects mentioned above.

  1. Tightening of the bag under vacuum

  2. The bulge created by the rotating cage support moving side to side

The next item to consider is the sequence, force, and starting stopping positions of the rotating cage support arm. Again all of these adjustments impact the effectiveness of the bag cleaning bulge. This also impacts the life of the bag.

Below is an animation of the rotating cage for a specific baghouse as a retrofit. Next to it is a video of the prototype build in action.

This last video is a look at the inside of the cage as it interacts with the bag.