A wet air scrubber is an air treatment technology that allows for the removal of particulate pollutants from gas streams, thus facilitating air pollution control. It helps eliminate dust, volatile organic compounds, and volatile inorganic compounds.

The operation of wet air scrubbers is similar to showers, as they cleanse and capture particulate pollutants by circulating liquid. Every scrubbing system has a special tank (usually at the bottom of the wet scrubber) with the solution applied for the air treatment process. The scrubbing solution is defined by a certain pH that indicates its acidity or alkalinity.

It is important to choose a pH level suitable for the liquid solution employed inside wet air scrubbers to reduce air pollution. For example, an acid reagent is used to decrease the basic volatile inorganic compound, while a basic reagent reduces the acid volatile inorganic compounds.

The solution contained in the scrubber tank is connected to the reagent tank to provide air treatment efficiency. Consequently, a specialized pump channels the reagent directly into the tank to adjust the pH levels. The contaminated air from the manufacturing process is directed into a pipe, passes through a fan, and then is processed within the scrubbing systems.

The new scrubbing technology includes two scrubbers with a two-stage air treatment system where the air flows into the first wet air scrubber, where the reduction of basic compounds such as ammonia happens, then it enters the second scrubber that enables the removal of the acid compound (for example, hydrogen sulfide).

Both scrubbing systems have tanks linked to reagent tanks where the acid or basic reagents used to stabilize the pH are kept. Also, it is possible to equip the plant with wet air scrubber systems with oxidant reagents to decrease the bacterial load before the emission.

When a manufacturer chooses a scrubber, they should pay special attention to the following features that regulate the particulate pollutants capturing process: particle size, droplet size, and the relative velocity between the particles and the droplets. The bigger the particles become, the simpler it is to trap them; thus, reducing droplet size enhances the capture efficiency of wet scrubbers, while increased speed leads to improved removal efficacy of wet air scrubbers.

Ultimately, the categorization of wet scrubber types hinges on the phase that receives energy input. It is possible to supply energy to the gaseous phase (venturi scrubbers), the liquid phase (spray towers), and both liquid and gaseous phases (packed bed scrubbers or floating scrubbers).

If you are looking for the best air treatment device to improve air quality, Redwood Technology offers a cutting-edge type of wet scrubber – a Multi-Vortex wet air scrubber.

Redwood technology is a fast-growing vendor of wet air scrubbers. The multi-vortex scrubber can remove gas emissions, dust, vapors, and other pollutants from a gas stream. It is an innovative technology created to save water that makes it more cost-efficient and differs from other types of scrubbers.  If you have any questions or would like to purchase a multi-vortex wet air scrubber, please contact us at info@rdwd.tech