This article's table of contents introduction:
- Nomenclature Breakdown
- Key Features
- Typical Specifications (Estimation for No23)
- Advantages for Coal Mining
- Common Models / Equivalents
- Summary
It appears you are referencing a specific model of industrial fan used in underground coal mining ventilation. Let me break down the nomenclature and function of the FBCDZ-10-No23 Coal Mine Exhaust Explosion-Proof Counter-Rotating Axial Flow Fan.
Nomenclature Breakdown
- F – Fan
- B – Explosion-proof (Chinese: 防爆, Fángbào)
- C – Counter-rotating (meaning two impellers rotating in opposite directions)
- DZ – Ducted / Axial Flow type
- 10 – Design sequence or motor pole number (often 10 indicates a specific design iteration or a 10-pole motor speed)
- No23 – Impeller diameter in decimeters (i.e., 23 decimeters = 3 meters / 2300 mm)
Key Features
-
Counter-Rotating Design
- Utilizes two impellers (stages) that rotate in opposite directions.
- This eliminates the need for stationary guide vanes, reducing size and weight while maintaining high efficiency.
- High pressure generation is possible in a compact form factor.
-
Explosion-Proof (Ex)
- Specifically built for coal mines where methane (firedamp) and coal dust are present.
- Motors and electrical components are fully enclosed in flameproof enclosures (typically rated Exd I or similar for mining).
- Prevents any internal spark from igniting the external atmosphere.
-
Exhaust Application
- This model is used for exhaust ventilation (suction side), pulling stale, dusty, or gas-laden air out of the mine.
- Often paired with a separate intake fan for forced ventilation, or used alone in a push-pull system.
-
Ducted Axial Flow
- Designed to be installed within a duct (or directly at the end of a mine tunnel/return airway).
- Airflow is straight-through, minimizing losses.
Typical Specifications (Estimation for No23)
| Parameter | Value (Typical) |
|---|---|
| Impeller Diameter | 2300 mm (2.3 m) |
| Air Volume (Q) | 40 – 120 m³/s (depending on pressure and speed) |
| Static Pressure | 1000 – 4500 Pa (high pressure variant for mines) |
| Motor Power | 2 × 110 kW to 2 × 400 kW (dual motor counter-rotating) |
| Voltage | 380V / 660V / 1140V (common mining voltages) |
| Efficiency | ≥ 80% (axial counter-rotating is quite efficient) |
| Application | Main mine ventilation return shaft or auxiliary tunneling |
Advantages for Coal Mining
- High Static Pressure at Low to Medium Flow – Ideal for long, rough mine galleries with high resistance.
- Reversible Airflow – Many counter-rotating fans can reverse airflow by changing the rotation direction of the impellers, aiding emergency evacuation.
- Explosion Safety – Certified under standards like GB/T 3836 (China) or IECEx for explosive gas environments.
- Compact – Shorter axial length compared to traditional axial fans with guide vanes.
Common Models / Equivalents
The FBCDZ series is a standard Chinese coal mine fan. Equivalent models from other manufacturers might include:
- FBCDZ-8-No23 (8-pole, lower speed)
- BDK series (older designation for counter-rotating mining fans)
- K45 / K55 series (another Chinese mining fan series)
Summary
The FBCDZ-10-No23 is a 3-meter diameter, explosion-proof, counter-rotating axial exhaust fan ideal for high-pressure coal mine ventilation. It uses two opposite-rotating impellers to generate high pressure efficiently without stator vanes, while its explosion-proof construction safely handles methane-laden air.
If you need specific technical data (pressure curves, motor specs, or installation dimensions), you would need the manufacturer's catalog (e.g., from brands like Shandong China Coal Group, Shenyang Blower Works, or Zibo Boiler Fan), as "No23" refers to a specific size, not a universal standard drawing.
