Poke High Temperature Industrial Dust Filter Bag 175mm×3100mm Overview
1. Product Basics
Dimensions: 175mm diameter × 3100mm length (standard cylindrical filter bag).
Material: Designed for high-temperature applications (typically up to 240–260°C, depending on the specific fabric, e.g., P84, PTFE, Fiberglass, or Meta-aramid).
Application: Used in industrial dust collection systems (e.g., cement plants, steel mills, incinerators, power generation, and chemical processing).
2. Key Features for High-Temperature Use
Thermal Stability: Made from materials that resist degradation at elevated temperatures.
Fiberglass: Handles up to 260°C, but brittle and prone to mechanical damage.
P84 (Polyimide): Good for 240°C with excellent chemical resistance.
PTFE (Teflon): Operates up to 260°C, chemically inert, and highly resistant to acids/bases.
Meta-aramid (Nomex-type): Suitable for 200–220°C, flexible, and cost-effective.
Chemical Resistance: Prevents breakdown from corrosive gases (e.g., SO₂, NOx, chlorides).
Abrasion Resistance: Ensures durability in high-velocity dust-laden airflows.
Low Emission: Fine filtration (typically MERV 15–16) captures PM2.5 and PM10 particles.
3. Design Considerations
Top & Bottom Configurations:
Snap Band / Cuff Top: For easy installation in cage-supported systems.
Plain or Sewn Bottom: Prevents dust bypass.
Surface Treatment:
Singed/Calendered: Reduces fiber shedding.
PTFE Membrane Laminated: Enhances filtration efficiency (HEPA-like performance).
Cage Compatibility: Requires rigid, galvanized, or stainless steel cages to prevent bag collapse.
4. Performance Factors
Air-to-Cloth Ratio: Typically 1.5–2.5 m³/min/m² (higher ratios increase filtration speed but may reduce bag life).
Differential Pressure: Optimal at 1000–1500 Pa (higher pressure drops reduce efficiency and energy efficiency).
Cleaning Mechanism:
Pulse-Jet: Recommended for high-temperature bags (reverse air or shaker designs are less common).
Compressed Air Quality: Must be dry and oil-free to prevent bag damage.
5. Installation & Maintenance
Pre-Installation Check:
Verify bag dimensions match the housing.
Inspect cages for burrs or misalignment.
Replacement Indicators:
Pressure drop exceeding 2000 Pa.
Visible wear, holes, or seam failures.
Storage: Keep bags in a dry, cool environment to prevent moisture absorption (for fiberglass) or UV degradation (for aramids).
6. Comparison with Standard Filter Bags
| Feature | High-Temperature Bag | Standard Bag (e.g., Polyester) |
|---|---|---|
| Max Operating Temp. | 240–260°C | 130–150°C |
| Lifespan | 1–3 years | 1–2 years (less in harsh conditions) |
| Cost | Higher | Lower |
| Best For | Cement, incinerators | General industrial dust |
7. Recommendations
For Extreme Heat (240–260°C): Use PTFE or Fiberglass bags.
For Moderate Heat (200–220°C): Meta-aramid (Nomex) is cost-effective.
For Chemical Resistance: PTFE is unmatched.
Avoid: Polyester, Nylon, or Acrylic in high-temp applications (they melt or degrade).
8. Potential Issues & Solutions
Bag Blinding (Clogging):
Cause: Fine particles or moisture.
Fix: Use PTFE membrane bags or pre-coat with limestone.
Premature Failure:
Cause: Over-pulsing, poor cage fit, or thermal shock.
Fix: Adjust pulse timing, ensure proper cage alignment, and avoid rapid temperature changes.
Conclusion
The 175mm×3100mm high-temperature dust filter bag is critical for industries requiring efficient dust collection in extreme conditions. Select the right material (PTFE, P84, Fiberglass, or Meta-aramid) based on temperature, chemistry, and mechanical demands. Proper installation, maintenance, and monitoring of pressure drops will maximize bag lifespan and system efficiency.
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