Cyclonic wet air scrubbers

Cyclonic wet air scrubber, or cyclone scrubber, is a wet air scrubber that uses both dry cyclone and spray chamber technologies for pollution control. The main scrubbing principle consists of two phases:

  • the inlet gas enters the chamber and swirls through the chamber in a corkscrew motion;
  • while the polluted gas swirls, cleaning liquid is sprayed inside the chamber; the pollutants are removed via liquid droplets that are eventually thrown onto the chamber walls and washed down and out.

There are two types of cyclonic wet air scrubbers available commercially: irrigated cyclone scrubbers and cyclonic spray scrubbers. In the first type, the inlet gas enters through the top and forced to go down in a spiral, while being sprayed with a cleaning liquid, then the gas is forced to change direction and go upwards in a tight spiral. The scrubbed gas then exits through the top of the chamber, and the liquid is washed down. In cyclonic spray scrubbers, the polluted air enters through a bottom tangential entry, goes upwards through a cleaning liquid mist, and exits through an opening at the top, while the cleaning liquid droplets are pushed to the chamber walls by the air stream.

Cyclonic scrubbers are more effective at particle collection than gas collection; quick gas movement limits the contact time of air and liquid, thus reducing the effectiveness of gas collection. However, cyclonic wet air scrubbers are not the most outstanding in particle collection among other wet scrubbers either; they are less efficient than venturi scrubbers as cyclones are not able to produce the same amount of useful turbulence. Particles larger than 5 µm are collected with an efficiency of 90%.

Cyclonic scrubbers suffer from the following maintenance problems:

  • Nozzle plugging – the nozzles are plugged from high concentrations of particulate matter in a recycled cleaning liquid or in a gas stream. Nozzles are difficult to access, therefore the cleaning process becomes harder.
  • Corrosion and erosion of the walls of the cyclone body – the cyclone chamber is prone to deterioration due to pollutants in a gas or a cleaning liquid. Another reason for corrosion of the walls is a high velocity of the gas.

Being a new type of wet air scrubber, Scroiler™ cleans air from gases, dust, vapors and other admixtures using water or other cleaning liquid. Scroiler™ produces the cleaning mist differently from other scrubber systems, which results in running costs that are much lower than for a common wet air scrubber.

If you would like to purchase Scroiler™, please contact us at info@optromix.com

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