Spray Tower for Acid Gas Absorption

Wet Scrubbers for Acid Gas Absorption

Dürr Megtec provides a variety of spray tower, tray tower and packed tower designs that control industrial acid gas emissions.

Wet Scrubbers benefits

  • Simplicity of construction and operation
  • Flexibility of operation (gas volume, acid gas concentration, etc.)
  • Low pressure drop
  • High removal efficiencies for a variety of acid gases
  • Not susceptible to plugging
  • Small footprint
  • Low capital equipment and installation cost


Functionality Wet Scrubbers

The principle of acid gas removal is to expose the acid gas to an alkaline agent and by chemical reaction form a stable salt, which subsequently can easily be removed with the liquid. This is accomplished in a spray chamber, most often a vertical tower, where water containing the reagent provides the necessary contact surface for the chemical reaction to take place.

The most common reagents include:

  • Sodium hydroxide (caustic) NaOH
  • Sodium carbonate (soda ash) Na2CO3
  • Magnesium hydroxide Mg(OH)2
  • Calcium hydroxide (hydrated lime) Ca(OH)2