7.4 Dynamic scrubber

This type of scrubber is similar to spray towers, but only difference is that the dynamic scrubber uses power driven rotor that breaks the scrubbing liquids into finely dispersed droplets. Dynamic scrubbers are also known as mechanically –aided scrubbers or disintegrator. Liquid is sprayed into the suction of a fan and the wetted impeller and casing captures dust particles. Most dynamic scrubber systems humidify the waste air upstream of the rotor to reduce evaporation and particle deposition in the rotor area. This type of scrubber efficiently removes fine particulate matter, but the use of rotar in the system increases the maintenance cost. Pretreatment device, such as cyclone often used before dynamic scrubbers to remove the large particulate matter from the waste air stream. Collection efficiencies for dynamic scrubbers are similar to those for cyclonic spray towers.