What Issues Should Be Noted When Using Pulse Bag Filters to Treat High-Temperature and High-Humidity Gases?

When using pulse bag filters to treat high-temperature and high-humidity gases, attention should be paid to bag damage, corrosion, and dew formation, focusing on four key points.

Select high-temperature/moisture-resistant bags (PPS, PTFE, fluorine composites). 

PPS works stably at 160-180℃ (short-term 200℃) with good moisture resistance; 

PTFE resists higher temperatures but costs more. Choose materials based on gas characteristics and cost.

Install pre-cooling devices (heat exchangers, cooling towers, air mixers) to reduce the gas temperature to within the bag’s tolerance range, ensuring stable and uniform cooling.

Take moisture-proof measures: 

insulate the equipment to avoid dew formation, install dehumidifiers or demisters, and heat ash hoppers to prevent dust hardening.

Optimize cleaning parameters:

 increase frequency (to prevent crusting), reduce pressure (0.3-0.5MPa to avoid brittle bag damage), extend cleaning time, and use dried/filtered compressed air.

Strengthen daily inspections: 

replace damaged bags in a timely manner, perform anti-corrosion treatment, and adjust pre-cooling/moisture-proof devices promptly.