FBCDZ-6-NO.21 Coal Mine Explosion-Proof Counter-Rotating Axial Flow Ventilation Fan

Product Description

The FBCDZ-6-NO.21 Coal Mine Explosion-Proof Counter-Rotating Axial Flow Ventilation Fan represents a cutting-edge advancement in mine ventilation technology. Engineered as a Class I explosion-proof device compliant with ATEX and IECEx standards, this axial flow fan features dual counter-rotating impellers housed in a reinforced steel alloy casing with corrosion-resistant coating. The optimized blade profile—designed through computational fluid dynamics (CFD) simulations—ensures minimal turbulence while maintaining a volumetric flow rate of 18-36 m³/s at static pressures up to 4800 Pa. Integrated thermal sensors and vibration monitoring modules provide real-time operational diagnostics.

Primary Applications

This in coal mining shafts

• Emergency smoke extraction during fire incidents
• Continuous airflow maintenance in main/auxiliary tunnels
• Dust suppression in mineral processing zones
• Ventilation of underground storage facilities and transportation corridors
  Its primary mission: maintaining oxygen levels >19.5% while keeping combustible gas concentrations below 0.5% LEL (Lower Explosive Limit).

Technical Features

1. Intrinsically Safe Design
   Motor compartments filled with quartz-sand inert material prevent spark propagation, certified for Group I (mining) hazardous environments.

. Energy-Optimized Performance
Variable-frequency drive compatibility reduces power consumption by 30-40% compared to fixed-speed models, with IE4-class high-efficiency motors.

3. Noise Control
   Acoustic dampeners and blade-edge serrations achieve 85 dB(A) at 1m distance—15% below industry benchmarks.

4. Maintenance Engineering
   Quick-release impeller assemblies enable rotor replacement in <45 minutes without dismounting the main housing.

5. Smart Monitoring
   RS-ADA systems for predictive maintenance analytics.

Technical Q&A

Q: What distinguishes counter-rotating design from single-stage fans?
A: The tandem impellers create additive pressure gradients without requiring guide vanes, achieving 40% higher pressure coefficients while reducing axial length by 28%. This eliminates turbulent wakes between stages.

Q: How does it perform in high-humidity environments?
A: IP65-rated enclosures and hydrophobic nano-coatings prevent moisture ingress. All electrical components undergo 500-hour salt-spray testing7.

Q: What safety certifications apply?
A: Certified to GB3836.1-2010 (China), EN 60079-0:2018 (EU), and MSHA 30 CFR Part 75 (US) standards. Explosion-proof marking: Ex d I Mb.

Q: Typical service intervals?
A: 12,000-hour bearing life with automated lubrication. Comprehensive overhaul recommended at 50,000 operational hours.

Q: Installation requirements?
A: Requires Class III concrete foundation with vibration isolators. Pre-wired control cabinets simplify commissioning—full integration achievable within 72 hours.