Biomass Co-Firing Coal Powder Grinding Mill: Key Equipment for Efficient Fuel Preparation
Introduction
In the era of sustainable energy development, biomass co-firing with coal has emerged as a pivotal technology for reducing carbon emissions in thermal power plants. The efficiency of this process heavily relies on the preparation of finely ground fuel mixtures, where advanced grinding mills play a decisive role. This article explores the technological requirements and solutions for biomass-coal powder preparation, with a focus on high-performance grinding equipment.
Challenges in Biomass-Coal Co-Firing
The heterogeneous nature of biomass materials (wood chips, agricultural waste) and coal demands specialized grinding solutions to achieve:
- Uniform particle size distribution (D97 ≤ 100μm)
- Moisture content control (<15%)
- High throughput capacity (5-50 ton/h)
- Low energy consumption (<30 kWh/ton)
Critical Equipment Selection
1. Ultra-Fine Grinding for Enhanced Reactivity
Our SCM Ultrafine Mill series demonstrates exceptional performance in biomass-coal composite grinding:
- Precision Classification: Vertical turbine classifier achieves 325-2500 mesh (5-45μm) with ≤5% oversize particles
- Dual-Fuel Adaptation: Special wear-resistant alloy rollers withstand abrasive biomass silica content
- Energy Efficiency: 30% lower power consumption compared to conventional ball mills
Technical Highlight: SCM1680 Model
| Parameter | Value |
|---|---|
| Capacity | 5-25 ton/h |
| Main Motor Power | 315kW |
| Final Fineness | D97≤5μm (adjustable) |
| Moisture Tolerance | ≤18% (with pre-drying system) |
2. Large-Scale Processing Solutions
For power plants requiring >30 ton/h capacity, the MTW Series Trapezium Mill offers:
- Curved air duct design reduces pressure loss by 15%
- Modular wear parts enable quick replacement during maintenance
- Integrated drying-grinding system handles 12-18% moisture content
Case Study: MTW215G Performance
A 300MW power plant achieved 20% biomass co-firing ratio using MTW215G with:
- Throughput: 38 ton/h (60% coal + 40% wood pellets)
- Specific energy: 22 kWh/ton
- Particle uniformity: 90% < 75μm
System Integration
Complete fuel preparation systems should incorporate:
- Pre-crushing stage (hammer mill for biomass size reduction)
- Drying system (rotary or flash dryer)
- Grinding mill with classifier (SCM/MTW series)
- Pneumatic conveying and storage silos
Conclusion
The transition to sustainable energy requires advanced grinding technologies that can handle diverse fuel compositions. Our SCM Ultrafine Mill and MTW Trapezium Mill series provide the necessary precision, efficiency, and reliability for biomass-coal co-firing applications, helping power plants meet both environmental and operational targets.
