Wet air scrubbers are the best air treatment devices for gas monitoring. In wet types of scrubbing for gaseous control, the operating principle is based on the solution applied to remove particulate pollutants from an exhaust stream. The absorption process eliminates particulates. This is the reason why wet scrubbers for air pollution control are often called absorbers.

Most wet air scrubbers or absorbers offer an efficiency of more than 90% depending on the reagent and particulate pollutants absorbed. The scrubbing solution or water enables the removal of the contaminant. It is possible to use other solutions as the absorbent for gases with low water solubility, for instance, dimethylaniline or amines.

It is essential to focus closely on the significant solubility of the selected absorbent and its relatively low price. Additionally, wet scrubbers can remove particulate matter, but they are more effective in treating gases, such as acid gases, water-soluble inorganic pollutants, and volatile organic compounds.

The operating principle of wet air scrubbers is based on “ the amount of soluble gas in the gas stream and the concentration of the solute gas in the liquid film in contact with the gas.” There may be chemicals that react with the particulate pollutants being absorbed to decrease the concentration of water. Other scrubbing solutions may need for absorbent separation and liquid regeneration to make costs lower.

Usually, wet scrubbers use vast areas to provide close contact between the solution and the gas stream. It is possible to create such an area by directing the water or other solution over different media, for example, packing, meshing, grids, or trays, or by producing a spray of droplets. The most popular designs of wet air scrubbers consist of spray tower, tray-type, and packed bed scrubbers, which are typically regarded as low-energy scrubber systems.

Packed bed scrubbers are widely employed for gas monitoring. This scrubber system passes the solution over packing material to supply a large surface area for the interaction between gas and liquid. The wet scrubbers are distinguished considering the relative direction of the gas and liquid flows. Moreover, in the packed bed scrubbers, the water spreads at the top of the tower by sprays or weirs and flows downward over the packing material. 

Unfortunately, these scrubber systems have several operating challenges, for instance, if the pressure differential, liquid flow, and gas flow are not kept relatively constant. Some common disadvantages include low gas flow rate, low liquid flow rate, condensation of aerosols in the system, poor liquid distribution, etc.

If you are looking for a highly advanced scrubber system, Redwood Technology offers a cutting-edge wet scrubber that is a Multi-Vortex scrubber. Multi-Vortex wet air scrubber could apply water contaminated with dust, sand, and even small rocks to capture particulate pollutants, different types of dust, and some gases from the air. 

This type of scrubber is an ideal solution for ore and coal mining. Thus, it can be used in different mining, combustion, and chemical processes to capture gases. Also, in some cases, the unique Multi-Vortex scrubber design allows utilizing cheaper reagents to capture the pollutant gas with more efficiency than a standard wet scrubber. If you would like to buy Multi-Vortex wet air scrubber or have some questions, please contact Redwood Technology at info@redwood.technology.