Bag Filter Houses

Industrial dust collection for kilns, crushers, conveyors, and furnaces. Automated cleaning systems maintain consistent pressure drop across the filter media throughout operation.

Pulse-Jet — High-pressure compressed air pulses clean bags without stopping airflow. Handles high dust loads in continuous operation — standard for kiln and crusher exhaust systems.

Shaker-Type — Mechanical vibration dislodges dust cake. Simpler mechanism with lower compressed air requirements — cost-effective for intermittent duty and lower dust loads.

Fabric Selection

Fabric choice is driven by gas temperature and chemical composition:

• Polyester — Standard duty up to 120°C. Lowest cost, good abrasion resistance.
• Nomex (Aramid) — Up to 250°C. Required for kiln and dryer exhaust.
• PTFE Membrane — Up to 260°C with chemical resistance. For acid gas environments.
• Ceramic/Fiberglass — Up to 400°C. Specialty applications only.

Bag count and fabric area are sized from actual gas volume, temperature, and grain loading — not catalogue estimates.

Structural Design

Compartmentalized construction allows online maintenance — individual compartments isolate for bag replacement while the system continues operating. Hopper design prevents bridging and ensures positive dust discharge to screw conveyor or rotary valve.

All structural steel is designed for full negative pressure plus wind and seismic loads per applicable codes.

Commissioning

• Pressure drop baseline verification at clean-bag condition
• Pulse timing and solenoid function testing
• Leak detection under negative pressure (soap bubble test)
• 50-hour observation period with load documentation
• Operator training on alarms and maintenance procedures

Maintenance Schedule

• Monthly: Pulse solenoid operation check, tube sheet inspection
• Quarterly: Visual bag inspection for damage or calcite buildup
• Semi-annually: Cage condition check, replace if warped
• Annually: Full pulse valve assembly service, worn bag replacement