Optimized Desulfurization Limestone Powder Grinding Production Line for Efficient Flue Gas Treatment

With increasingly stringent environmental regulations worldwide, flue gas desulfurization (FGD) has become mandatory for coal-fired power plants and industrial boilers. Limestone-gypsum wet desulfurization remains the most widely adopted technology, where high-quality limestone powder plays a crucial role in SO2 removal efficiency. This article presents an optimized limestone grinding solution featuring ZENITH’s advanced milling technologies for superior desulfurization performance.

Technical Requirements for Desulfurization Limestone

Effective FGD systems demand limestone powder with:

• Precise particle size distribution: 325-2500 mesh (45-5μm) with D90≤44μm
• High reactivity: CaCO3 content ≥90% with low inert impurities
• Consistent quality: Moisture content <1% and stable fineness
• Mass production capacity: 5-50 tons/hour continuous operation

System Configuration

The complete production line comprises:

1. Raw material pre-homogenization system
2. Automated feeding conveyor
3. Core grinding unit (vertical mill/ultrafine mill)
4. Multi-stage classification system
5. Pulse jet baghouse dust collector
6. PLC-based centralized control

Recommended Equipment Solutions

1. XZM Ultrafine Mill for High-Precision Grinding

For power plants requiring ultra-fine limestone powder (D97≤5μm), ZENITH’s XZM Ultrafine Mill delivers exceptional performance:

• Energy efficiency: 30% lower power consumption compared to jet mills
• Smart control: Real-time particle size monitoring via laser analyzer
• Compact design: 40% smaller footprint than traditional ball mills

Technical highlights include:

2. MTW Series Trapezium Mill for Large-Scale Production

For mega power plants with 1000MW+ units, the MTW215G Trapezium Mill offers:

• Massive throughput: 15-45 t/h single-line capacity
• Wear-resistant design: Combined shovels reduce maintenance frequency
• Advanced classification: Curved air duct improves separation efficiency

Process Advantages

ZENITH’s solution outperforms conventional systems through:

1. Integrated grinding-drying: Simultaneous moisture reduction during milling
2. Closed-loop control: Automated adjustment of grinding pressure and classifier speed
3. Zero wastewater: Dry process eliminates slurry treatment
4. Turnkey delivery: From foundation design to commissioning

Environmental Benefits

The system achieves:

• 99.9% dust collection efficiency (emission <20mg/Nm³)
• Noise level ≤75dB at 1m distance
• Zero mercury release from limestone processing
• Waste heat recovery option available

Case Study

A 2×660MW power plant in Vietnam adopted ZENITH’s XZM268 mills for their FGD system, achieving:

• SO2 removal rate increase from 92% to 97.5%
• Annual limestone consumption reduced by 18,000 tons
• Grinding power consumption lowered to 28kWh/t

ZENITH’s desulfurization limestone grinding solutions combine cutting-edge milling technology with deep process know-how, delivering both economic and environmental benefits. Our 30+ years of mineral processing expertise ensures reliable performance across varying limestone qualities and operating conditions.

For project consultation or equipment selection, please contact ZENITH’s technical team for customized proposals.