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 $SO_2$ 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.