Baghouses
Baghouse
Also known as baghouses, bag filter house, dust collector house.
A baghouse is the structural enclosure that houses the bags, cages, cleaning system, tubesheet, plenums and hoppers of a fabric-filter dust collector. The word is used in both broad ("the plant has a 12-compartment baghouse") and narrow ("a baghouse is the housing, the fabric filter is the system") senses; in everyday industry practice the two terms overlap.
Compartmented design
Large industrial baghouses are subdivided into several compartments — each with its own gas-flow damper — so that one compartment can be isolated for offline cleaning or bag replacement while the rest stay online. The standard pulse-jet compartment count for utility duty is 8–16; cement and WtE baghouses may run 20+.
Why sonic horns help
Sonic horns mounted at compartment level address fouling that the primary cleaning system (pulse-jet, reverse-air or shaker) cannot reach:
- Bag-row dead zones at the back of the compartment
- Tubesheet area dust deposits
- Hopper bridging below the bags
- Inlet-plenum dust dropout
Related terms
Related terms
- Fabric filterA fabric filter removes particulate from a gas stream by passing it through woven or felted bag media. Sonic horns supplement primary cleaning and reduce differential pressure.
- Pulse-jet baghouseA pulse-jet baghouse cleans bags with brief, high-pressure reverse-air pulses while staying on-line. The dominant industrial fabric-filter design for new installations.
- Reverse-air baghouseA reverse-air baghouse cleans bags by isolating a compartment and passing low-pressure clean air through the bags in the reverse direction. Common on coal-fired utility duty.
- Shaker baghouseA shaker baghouse cleans bags by mechanically shaking the bag-support frame during compartment-offline cycles. Legacy design still common on light industrial duty.
- Compartment isolationCompartment isolation is the procedure of closing inlet and outlet dampers on one baghouse compartment so it can be cleaned or have bags replaced while the rest stays online.
- Sonic hornA sonic horn is a pneumatically-driven low-frequency sound emitter (typically 60–400 Hz at 140–180 dB SPL) used to dislodge particulate fouling from boilers, ESPs, baghouses and process vessels.