O. In the Electro-Catalytic Oxidation system, the condensing wet ESP serves two primary objectives: to remove acid mist from the gas stream; and to act as a "scrubber" to remove additional NO2 and SO2 which is not converted directly to acids by the Gas Converter. At the exit of the condensing wet ESP, approximately 20% of the NOx and 50% of the SO2 will remain in the flue gas to be emitted from the stack. The wet ESP effluent which includes nitric and sulfuric acids, ash, and heavy metals will be directed to the Acid Recovery System for further processing.The Acid Recovery System treats effluent from the wet ESP. The wet ESP effluent will consist of approximately ten percent ash, nitric and sulfuric, and heavy metals. Conventional technology can separate the ash and acids, and concentrate nitric and sulfuric acids, leaving a salable byproduct. Technological Advantages of Electro-Catalytic Oxidation Technology are as follows:•No reagents to purchase or handle •No new waste streams requiring landfill disposal •No makeup water required•Flue gas remains above saturation •Low system pressure drop (use existing fan) •Uses existing plant systems (steam, water) and footprint•Uses conventional materials and power supplies •Should meet or exceed pending emissions limits for Hg and PM2.5 •Produces valuable byproductsReferencesZero Emissions Technology. (Spring 1997). New Technology Demonstration: Pilot Installation for Full-Scale Arc Snubber Power Supply. Breakthrough - A Zero Emissions Technology Technical Journal. New Durham, NH.Zero Emissions Technology. (Spring 1997). Combined removal of nitrogen oxides (NOx), sulfur dioxide (SO2), mercury (Hg), and fine particulate matter (PM2.5) from the flue gas of coal fired power plants. Breakthrough - A Zero Emissions Technology Technical Journal. New Durham, NH.Larry S. Monroe. Testing of a Combined Dry and Wet Electrostatic Precipitator ...
