Flue Gas Desulphurization

Flue Gas Desulphurization

  • High SO₂ Removal Efficiency
  • Flexible configuration
  • Byproduct Recovery
  • Corrosion-Resistant Construction
  • Automated operation and monitoring
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Flue Gas Desulphurization
Features

Flue Gas Desulphurization

Flue Gas Desulphurization (FGD) is a critical air pollution control technology designed to remove sulfur dioxide (SO₂) from the exhaust flue gases of fossil-fuel power plants, industrial boilers, and chemical furnaces. As environmental regulations become increasingly stringent, implementing a high-efficiency FGD system is essential for industrial compliance and sustainable operations.

High-Efficiency Desulphurization Technology

Sulfur dioxide is a major contributor to acid rain and respiratory health issues. Our FGD solutions utilize advanced chemical absorption and adsorption techniques to neutralize SO₂ before it is released into the atmosphere. Depending on your facility's specific requirements regarding water availability, space, and byproduct utilization, we offer three primary configurations:

  • Wet Scrubbing (Limestone/Lime): The most widely used method, involving an alkaline slurry that reacts with flue gas to produce gypsum. This method offers the highest SO₂ removal efficiency (up to 99%).
  • Dry FGD System: Utilizes a dry sorbent injection into the flue gas stream. This is ideal for facilities with limited water resources and lower SO₂ concentrations.
  • Semi-Dry (Spray Dryer) System: A hybrid approach where a lime slurry is atomized into the gas stream. The heat from the flue gas evaporates the water, leaving a dry waste product for easy disposal.
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Key Advantages of Our FGD Systems

  • Regulatory Compliance: Designed to meet and exceed global and local environmental emission standards.
  • Operational Flexibility: Engineered to handle varying sulfur content in fuels, including high-sulfur coal and heavy oils.
  • Resource Recovery: In wet systems, the byproduct (Gypsum) can often be reclaimed and sold for use in cement and wallboard manufacturing.
  • Corrosion Resistance: Built using high-grade alloys and specialized linings to withstand the acidic nature of flue gas.

Industry Applications

FGD systems are a mandatory requirement for large-scale combustion processes across various sectors:

  • Thermal Power Plants: Essential for coal and oil-fired utility boilers to reduce atmospheric pollution.
  • Oil & Gas Refineries: Used in Fluid Catalytic Cracking (FCC) units and process heaters.
  • Cement Manufacturing: To neutralize sulfur released from raw materials and kiln fuels.
  • Chemical & Fertilizer Plants: Controlling emissions from sulfuric acid plants and specialized chemical reactors.
  • Iron & Steel Industry: Managing exhaust from sintering plants and coke ovens.

Frequently Asked Questions (FAQ) about Flue Gas Desulphurization

The primary goal is to "scrub" or remove sulfur dioxide (SO₂) from industrial exhaust gases. This prevents the gas from reacting with moisture in the atmosphere to form acid rain.

Wet FGD uses a liquid slurry (usually limestone and water) and offers the highest removal efficiency, but requires more water. Dry FGD uses a dry powdered sorbent, which is better for water-stressed regions but typically has a lower removal rate for very high-sulfur fuels.

Yes. In many wet limestone systems, the resulting byproduct is high-quality synthetic gypsum, which is a valuable raw material for the construction and agricultural industries.

While the FGD system is installed "downstream" (after the boiler), it creates a slight pressure drop. Our systems are engineered with high-efficiency booster fans to ensure that boiler draft and combustion performance remain unaffected.

Modern FGD systems are highly automated. Primary maintenance involves monitoring the reagent (lime/limestone) feed rates, ensuring the spray nozzles are clear, and managing the byproduct removal system. Our designs focus on easy access points to minimize downtime.