Dry Scrubber
Advanced Dry Air Pollution Control Systems for Acid Gas Removal
DRY ACID GAS REMOVAL SYSTEMS
Dry Scrubber
Dry Scrubbers are air pollution control devices that use dry sorbents (typically alkaline powders) to remove acid gases from industrial exhaust streams without using water. They work by injecting dry alkaline reagents into the flue gas stream, where they react with acidic pollutants to form solid byproducts that can be collected in downstream particulate control devices.
Product Overview
Dry Scrubber Technology
Dry Scrubbers are specifically designed for removing acid gases (SO₂, HCl, HF) from industrial flue gases using dry alkaline sorbents. Unlike wet scrubbers, they operate without liquid, making them ideal for applications where wastewater treatment is undesirable or where the gas stream is already dry.
- Water-Free Operation: No wastewater generation
- High Efficiency: 90-98% acid gas removal
- Corrosion Resistance: Dry operation minimizes corrosion
- Simple Operation: Easy to operate and maintain
- Compact Design: Smaller footprint than wet systems
- Low Operating Cost: Minimal energy consumption
- Dry Byproduct: Produces dry, disposable solids
- Temperature Tolerance: Operates at higher temperatures
Technical Specifications
| Parameter | Specification | Details |
|---|---|---|
| Type | Dry Injection / Spray Dryer | Multiple design configurations |
| Air Flow Capacity | 5,000 - 500,000 CFM | Customizable for specific needs |
| Removal Efficiency | 90-98% for SO₂ | 95-99% for HCl/HF |
| Pressure Drop | 2-8 inches WG | Lower than wet scrubbers |
| Reagent Type | Hydrated Lime, Soda Ash, Trona | Various alkaline sorbents |
| Construction Material | Carbon Steel, SS 304, FRP | Corrosion resistant options |
| Temperature Range | 250-700°F (121-371°C) | Ideal for hot gas streams |
| Residence Time | 1-3 seconds | For complete reaction |
Common Sorbents Used
| Sorbent | Chemical Formula | Applications | Advantages |
|---|---|---|---|
| Hydrated Lime | Ca(OH)₂ | SO₂, HCl, HF removal | High reactivity, Cost-effective |
| Sodium Bicarbonate | NaHCO₃ | Acid gases, Dioxins | High efficiency, No activation needed |
| Soda Ash | Na₂CO₃ | SO₂, HCl removal | Good reactivity, Moderate cost |
| Trona | Na₃H(CO₃)₂·2H₂O | SO₂ control | Natural mineral, Cost-effective |
| Activated Carbon | C | Mercury, Dioxins, VOC | Adsorption capability, Multi-pollutant |
| Magnesium Hydroxide | Mg(OH)₂ | Acid gas neutralization | High reactivity, Less scaling |