Tsunami - Reverse Air Impulse Booster
Reverse Air Baghouse Performance: Reverse-Air (or sometimes referred as Reverse-Gas) baghouses are fabric filters that use recycled clean-side gases in a counterflow manner in order to regenerate the filtration elements, and operate on either positive or negative pressure. The main advantage of a Reverse-Air Fabric Filter (RAFF) is that it can only operate in off-line mode, and thus typically avoids the particulate penetration that typically occurs during on-line cleaning.
Among its disadvantages, however, is the difficulty the reverse-air cleaning system has in removing fine or tenacious dust. The problem is that sometimes, the pressure exerted on the fabric by the flow of reverse air is insufficiently high to remove all of the dust collected on the bags.
Typical Solutions to Baghouse Performance Issues
This difficulty has forced RAFF users to attempt different add-on solutions, some that work, and some that don’t. The most popular add on is the use of sonic horns, but this has been met with mixed success, sometimes with positive effects, but more often than not, with less than optimum results.
Sonic Horn disadvantages:
- necessitates removal of some bags increasing A:C ratio
- physical obstructions can deaden sound
- temperature can affect sound propagation
- particulate de-agglomeration causes increase in DP