Thermal power plants rely on coal mill pulverizers to grind raw coal into fine powder for efficient combustion. The pulverized coal ensures optimal heat release and reduces emissions. Key equipment includes vertical roller mills (VRM) and ball mills, with VRMs being preferred for their lower energy consumption and compact design.
| Equipment | Capacity (t/h) | Power (kW) | Fineness (R90μm) |
|---|---|---|---|
| Vertical Roller Mill | 10-50 | 200-800 | 12-20% |
| Ball Mill | 5-30 | 400-1000 | 15-25% |
A typical coal processing line integrates crushers, vibrating screens, and pulverizers. Primary crushers reduce coal size to <50mm, while secondary crushers further refine it to <10mm before pulverization. Screens ensure uniform feed size for the mill, enhancing efficiency.
Q: How to reduce wear in coal mills?
A: Use high-chrome alloy grinding rollers and定期maintenance schedules.
Q: What causes uneven fineness?
A: Improper airflow or worn grinding components. Adjust classifier speed or replace parts.
A 500MW plant in India upgraded to VRMs, achieving 15% energy savings and consistent fineness of R90μm=18%. The system included a two-stage crushing line with jaw and impact crushers, ensuring <8mm feed size for the mill.
