In wet air treatment, dust particles are collected due to the interaction of particulate contaminants with a liquid. Wet scrubbing is perfect for fine air treatment in cases where gas humidification and cooling are allowed.

Surfactants are often added to the liquid to increase the moistening ability of scrubber systems. The benefit of wet air scrubbers for air pollution control is that heat exchange (cooling) and mass transfer (absorption of gas particulates by liquid) processes can be carried out in one scrubber system simultaneously with dust collection.

The disadvantage of this method is the formation of a large amount of wastewater (sludge). If the captured dust particulate is insoluble, the wet scrubber is equipped with settling tanks or filters. If soluble dust is captured, then the resulting solution is evaporated, and treated with chemical reagents to obtain insoluble precipitates, etc.

The key factors for the efficient functioning of wet air scrubbers include establishing a well-developed gas-liquid contact area and ensuring high gas flow turbulence.

A developed surface of gas-liquid interaction can be formed by spraying a liquid in a gas stream (hollow scrubbers, centrifugal scrubber systems, Venturi scrubbers, etc.), by distributing liquid on solid surfaces in the contact zone, by distributing gas in a layer of liquid in the form of bubbles, jets (foam wet scrubbers).

Scrubbers refer to devices used for the treatment of gas and air with liquid, including the removal of dust particulate pollutants from gases.

The hollow scrubber is the simplest device for wet gas treatment from dust. Advantages of the system include simplicity, very low hydraulic resistance, reliability in operation. Its disadvantages are bulkiness, low specific productivity, and increased requirements for the purity of the initial wash water when using the nozzles as sprayers.

Unlike hollow scrubbers, Venturi scrubbers are diverse. In this wet air scrubber, liquid (or simply water) is performed by a high-speed gas flow in the nozzle and confuser of the system. Due to the high speed of the gas, its high turbulence and fine atomization of the liquid and high dust collection efficiency are ensured by the high speed of the gas. Its main disadvantage is its high hydraulic resistance.

Foam scrubber systems are widely used to treat highly dusty gases. Foam scrubbers are the most effective air treatment devices (their efficiency can reach 95-98 % with a dust particulate size of 2-5 microns). They have moderate flow resistance.

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@rdwd.tech.