Limestone-gypsum desulfurization equipment is a core industrial SO₂ removal device, adopting the globally prevalent, mature standard desulfurization process. Using cost-effective, widely available limestone as the main absorbent, it crushes, grinds, and mixes limestone with water to form absorption slurry. In the absorption tower, slurry fully contacts flue gas-SO₂ reacts with calcium carbonate and blown air to form gypsum. Limestone-gypsum desulfurization equipment then releases emissions via chimneys post mist elimination and flue gas heating, while recycling gypsum slurry through dewatering devices.

Product Features

Ultra-high desulfurization efficiency

Reaches ≥99% SO₂ removal rate, ensuring emission compliance.

Versatile absorbent & fuel adaptability

Compatible with limestone, lime, magnesite, etc.; suitable for boilers burning coal, heavy oil, Orimulsion, and petroleum coke.

Strong load & sulfur tolerance

Adapts to 15-100% unit load changes and handles flue gas with fuel sulfur content up to 8%.

Energy-saving patented technology

Patented tray optimizes gas-liquid distribution, reducing liquid-gas ratio and energy/material consumption; cross-spray pipes lower tower height to save space.

High resource utilization

Calcium-sulfur ratio as low as 1.02-1.03 (high absorbent efficiency); produces commercial-grade gypsum with ≥95% purity.

Concurrent dust removal

Achieves 80-90% dust removal efficiency for coal-fired boiler flue gas, further purifying emissions.

Components

Component	Material/Type	Function
Absorption Tower	FRP or Q355B carbon steel with anti-corrosion lining	Provides reaction space for SO₂ and slurry
Limestone Crushing & Grinding System	Jaw crusher + ball mill	Prepares qualified powder for slurry mixing
Slurry Circulation Pump	Anti-corrosion centrifugal pump	Delivers slurry to spray layers
Mist Eliminator	Polypropylene fiber	Removes fine droplets from treated flue gas
Patented Tray & Cross-spray Pipes	Corrosion-resistant alloy	Optimizes airflow, reduces energy consumption, and saves space
Gypsum Dewatering System	Vacuum belt filter	Recycles gypsum slurry into solid products
Control System	PLC automatic control with online monitoring	Regulates slurry concentration and pH value