WES Absorber technology can be applied to the absorption of SO2 in Flue Gas Desulfurization (FGD) as well as the removal of fine particulate matter and hazardous air pollutants such as mercury and HCl. The exceptional mass transfer and gas/liquid contact efficiency of the WES technology enables improved capture capability and significant capital and operating cost savings relative to liquid-spray contactors currently in use.
- Flue Gas Desulfurization: Most FGD installations (90%) utilize wet scrubbing with a limestone slurry. Regulation of SO2 emissions began with the Clean Air Act.
- Mercury Capture
- Particle Scrubbing
Demand for air pollution control (APC) equipment continues to grow because of both the increase in new fossil fuel power generation capacity and new emission requirements. The 1990 Amendments to the Clean Air Act and the Clean Air Interstate Rule (CAIR) have resulted in the need to upgrade older Flue Gas Desulfurization systems to meet the new emission requirements. Pending HAPS rules for large non-utility boilers in the USA will be finalized in 2010 with compliance commencing in 2013; this will create a new market for low cost control equipment for particulates, mercury and HCl.
WES Absorber technology has a significantly higher mass transfer efficiency and effective gas-liquid contact surface area than liquid-spray contactors. This enables much lower liquid to gas ratios for a given capture efficiency requirement and subsequent savings on liquid pump capital, operation and maintenance costs. WES gas-liquid technology can also operate with higher gas velocities than liquid-spray contactors without a loss in capture capability, enabling reductions in tower diameters that result in significant savings in fabrication costs and steel usage.