Flue Gas Desulfurization

Dry Flue Gas Desulfurization System installed at a power plant in Ledvice, Czech Republic

Flue gas desulfurization (FGD) involves the removal of sulfur dioxide (SO₂) contained in gases produced by the combustion of fossil fuels such as coal, oil, orimulsion, municipal solid waste, automobile tires and many industrial processes such as gasoline refining, cement, paper, glass, steel, iron, and copper production. Sulfur dioxide emissions are a primary contributor to acid rain and have been regulated by every industrialized nation in the world.

Hamon FGD systems have been efficiently addressing each of these needs since the widespread installation of FGD technologies beginning in the 1970s. World wide, Hamon FGD installations are treating over 65,000 MWs of power generation capacity in twenty countries and on many more industrial class applications.

Hamon FGD technologies include the latest state-of-the-art designs to remove these polluting emissions at the lowest cost. Each application for SO₂ reduction must consider the initial capital cost of equipment along with the long-term operational expenses associated with power, reagent and energy consumption along with maintenance and space considerations.

Hamon Flue Gas offers J-Power Entech licensed ReACT multi-pollutant control technology for simulateous control of SO₂, SO₃, NOx, Hg and particulate from low to medium sulfur coal fired utilities, rotary atomizer and two fluid nozzle based semi-dry (DFGD) processes for low to medium sulfur coal fired utilities, industrial applications and municipal waste combustion and ExxonMobil licensed wet gas scrubber (WGS) combined wet SO₂ and particulate scrubbers for petrochemical refineries. Each technology has special application benefits and performance capabilities.

• A completely dry process, ReACT provides extremely high levels of SO₂, SO₃, Hg and PM control and medium NOx control in an adsorption process utilizing activated coke. Regeneration of the activated coke and production of saleable sulfuric acid byproduct greatly reduces the logistics of reagent feed and disposal of materials from the plant site. The process is ideally suited for low sulfur coal utilities and especially those with water use or disposal issues.
• The semi-dry DFGD processes introduces finely atomized droplets of lime-based reagent slurry, which absorb and neutralize the SO₂/SO₃ and then evaporate to produce a dry particulate reaction product. Consequently, the DFGD process generates a simpler to handle dry waste product and uses a downstream fabric filter or ESP for particulate control.
• The Wet Gas Scrubber (WGS) technology for refineries provides combined particulate and SO₂ control of exhaust gases from FCCU and CO boilers. In WGS technology motive force for the flue gas flow can be provided by jet eductor venturi, if not already available from the upsteam pressure of the FCCU. The WGS process is a saturated gas scrubber based on sodium reagent for SO₂ control in a venturi section designed for simultaneous particulate capture.