Bag Filters
What Are Bag Filters Used For?
Bag filters are used for the clarification/filtration of fluids that have a relatively small loading of particles to be removed. The particle suspension passes through and the particles settle in the bag.
How Effective Are Bag Filters?
Unlike electrostatic precipitators, where performance may vary significantly depending on process and electrical conditions, functioning baghouses typically have a particulate collection efficiency of 99% or better, even when particle size is very small.
Bag Filter
What Is A Bag Filter?
A Bag Filter is an air pollution controlling industrial equipment, used prominently in a Steam Boiler House Assembly. It is used to control the levels of sulfur dioxide and others.
There are different types of Bag Filters such as Shakers, Reverse Air and Pulse Jet type, with Pulse jet type being the most promising one of outstanding results.
A Pulse Jet type Bag Filter consists of a Four-sided hollow metallic body which is conical at the downside. Also, a vertical squirrel cage type arrangement is there for supporting and holding the filter bags. These squirrel type cages are covered by filter bag material. After covering these cages with Filter Bags, it appears as a Pipe like geometry Downside of this cage is blind while the other side is open for the flue gases exit and pressurized air inlet.
During the operation of a Steam Boiler, the flue gases leaving the Boiler enters the Bag filter body. Now, these flue gases come in contact with the outer surface of the Filter bags ( pipe-like). As the ID Fan creates a continuous suction effect, these flue gases try to enter the cage. So the, bigger size dust particles get collected at the surface of the Filter and flue gases leaves Bag filter through the outlet.