In power plant engineering, coal crushing is a critical process to ensure efficient combustion and energy generation. A well-designed crushing system enhances fuel preparation, reduces transportation costs, and improves boiler efficiency. Modern coal crushing plants integrate advanced equipment to handle varying coal hardness and moisture levels.
1. Primary Crushers:
– Jaw Crushers: For coarse crushing (Feed size: ≤1,200mm; Capacity: 50–1,500 t/h).
– Rotary Breakers: Ideal for high-moisture coal (Capacity: 200–3,000 t/h).
2. Secondary Crushers:
– Hammer Crushers: Reduce coal to ≤25mm (Capacity: 100–800 t/h).
– Impact Crushers: Suitable for medium-hard coal (Output size: ≤50mm).
3. Tertiary Crushers:
– Roll Crushers: Precision crushing for final sizing (Output: ≤10mm).
– Feeding: Vibrating feeders regulate coal input.
– Crushing: Multi-stage crushing ensures uniform particle size.
– Screening: Circular or linear screens separate oversized particles.
– Storage: Crushed coal is stored in silos or bunkers.
| Equipment | Feed Size (mm) | Output Size (mm) | Capacity (t/h) | Power (kW) |
|——————–|—————-|——————|—————-|————|
| Jaw Crusher | ≤1,200 | 150–300 | 50–1,500 | 55–400 |
| Hammer Crusher | ≤350 | ≤25 | 100–800 | 90–315 |
| Roll Crusher | ≤80 | ≤10 | 20–200 | 15–132 |
Q1: How to choose between hammer and impact crushers?
A1: Hammer crushers suit high-moisture coal; impact crushers offer better shape for medium-hard coal.
Q2: What maintenance is required for coal crushers?
A2: Regular lubrication, wear-part
