Wet Scrubbers for Air Pollution Control Systems

Wet scrubbers in air pollution control systems include venturi and cyclonic scrubbers, acid gas absorbers or combinations of these systems to fit the needs of companies. AirPol designs wet scrubbers and wet electrostatic precipitators (WESPs), to effectively remove a wide range of pollutants.

Venturi and cyclonic scrubbers are wet scrubbers that control pollution with turbulent water at an engineered pressure range. This active scrubbing effectively removes particulate and water-dissociable pollutants like acid gases and tars, and can handle changing process conditions and pollutant loads. Venturis provide consistent gas stream control from traditional furnaces and in modern syngas recovery systems. 

Wet control processes can use multiple stages of design styles in wet scrubbers to target varied sizes of particulates and mists. Spray towers provide large volumes of water to drop temperature in the flue and scrub the gas. Packed beds provide a large surface area increasing the scrubber liquor-to-pollutant contact crucial to control pollutants. Tray towers are used in various low water flow stages and for final mist control.

The “small particle” polishing benefits of wet electrostatic precipitators (WESPs) are helping facilities meet the new EPA standards for fine and respirable particulate (PM2.5 & PM10). Sturdy electric rods provide an ionic charge that grabs the pollutants out of the air stream. Water increases the removal effectiveness and provides a constant washdown of captured particles. Capital project costs are minimized in retrofit installations because existing air pollution control equipment can still be used.

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