Watch our video overview to understand how Ducon’s FGD technology effectively removes harmful acid gases from industrial exhaust streams:
Cleaning Acid Gases from Industrial Smoke
Industrial processes, especially burning fuel in boilers or incinerators, release harmful gases like sulfur dioxide (SO2), hydrogen chloride (HCl), and hydrogen fluoride (HF). These “acid gases” contribute to acid rain and air pollution. Ducon’s Flue Gas Desulfurization (FGD) systems are designed to capture and remove these pollutants before they leave the smokestack, protecting the environment.
We specialize in Dry FGD systems, which are highly effective and use very little water. Ducon offers two main types of Dry FGD technology:
Semi-Dry Removal (SDR) FGD Systems
Think of the SDR system like a sophisticated spray cleaner for flue gas. Here’s how it works:
- A special liquid mixture (reagent slurry) is sprayed as a fine mist into the hot exhaust gas inside a large chamber (the spray dryer).
- Ducon’s advanced nozzles ensure the mist mixes thoroughly with the gas.
- The liquid reacts with and absorbs the harmful acid gases (like SO2, HCl) and can also capture pollutants like Mercury.
- The heat from the exhaust gas evaporates the water, leaving behind a dry powder containing the captured pollutants.
- This powder is then efficiently collected downstream using a fabric filter system (baghouse).
Benefits of Ducon’s SDR System:
- Highly Efficient: Can remove over 99% of SO2.
- Low Water Use: Ideal for locations where water is scarce.
- Reliable & Low Maintenance: Designed for high availability and reduced operating costs.
- Versatile: Effectively removes multiple pollutants.
Dry Circulating Reactor (DCR) FGD Systems
The DCR system uses a dry powder reagent (like lime) to clean the flue gas:
- The dry reagent powder is continuously mixed with the incoming flue gas in a special reactor chamber.
- A small amount of water is sprayed separately to help the chemical reaction happen more effectively.
- The reagent reacts directly with the acid gases (like SO2).
- The reacted powder and any unreacted reagent are collected in a downstream baghouse filter.
- A key feature is that the collected powder can be partially recirculated back into the reactor, ensuring the reagent is used efficiently, saving costs.
Benefits of Ducon’s DCR System:
- Effective Removal: Can achieve over 90% SO2 removal efficiency.
- Good Reagent Utilization: Recirculation reduces waste and cost.
- Adaptable: Can be combined with dry injection of activated carbon before the baghouse to remove contaminants like dioxins and mercury, especially for applications with lower acid gas concentrations.
Typical Applications for Ducon FGD Systems
- Coal-Fired Power Plants
- Waste-to-Energy Incinerators
- Industrial Boilers (burning various fuels)
- Cement Kilns
- Glass Furnaces
- Other processes generating SO2, HCl, or HF emissions
Need Effective Acid Gas Control?
Ducon provides custom-designed FGD solutions tailored to your specific emission control needs. Whether you require high-efficiency SO2 removal, mercury control, or a system optimized for low water usage, contact us to discuss your project.
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