Optimized Coal Grinding System for Efficient Desulfurization in Power Plants
Introduction
Modern power plants face increasing environmental regulations, particularly in sulfur emissions control. An optimized coal grinding system is critical for achieving efficient desulfurization through limestone-gypsum wet flue gas desulfurization (WFGD) processes. This article explores technical solutions for coal pulverization optimization with focus on particle size distribution control and energy efficiency.
Key Requirements for Desulfurization-Oriented Grinding
Effective WFGD systems demand coal powder with:
- D50 particle size between 45-75μm for optimal reactivity
- Narrow size distribution (D90/D10 < 3.5)
- Moisture content below 1.5%
- Consistent feeding rate with ±2% fluctuation
Advanced Grinding Technologies
Vertical Roller Mill Solutions
Our LM Series Vertical Roller Mill demonstrates exceptional performance in coal preparation for desulfurization:
- Integrated drying/grinding system reduces moisture to 0.8%
- Dynamic classifier ensures 95% particles within 45-75μm range
- Specific power consumption 18-22kWh/t (40% lower than ball mills)
Ultrafine Grinding for Enhanced Reactivity
For plants requiring superior sulfur capture efficiency, our SCM Ultrafine Mill delivers:
- Adjustable fineness from 325-2500 mesh (D97≤5μm)
- Patented turbo classifier achieves narrow particle distribution
- Energy consumption 30% lower than conventional systems
System Integration
| Component | Function | Recommended Product |
|---|---|---|
| Primary Grinding | Coarse size reduction | MTW Series Trapezium Mill |
| Fine Grinding | Particle size optimization | SCM Ultrafine Mill |
| Material Handling | Precise feeding system | GZ Series Vibrating Feeder |
Case Study: 600MW Power Plant Retrofit
Implementation of our LM220M Vertical Coal Mill achieved:
- Desulfurization efficiency improvement from 92% to 97.5%
- Grinding system energy reduction by 28%
- Maintenance interval extended from 4,000 to 8,000 hours
Conclusion
Modern power plants require grinding systems that combine precision particle control with energy efficiency. Our vertical roller mills and ultrafine grinding solutions provide the technical foundation for meeting stringent environmental standards while maintaining operational economy. The integration of intelligent control systems further enhances performance and reliability in demanding power generation applications.
