Wet Scrubbers for Acid Gas Absorption
Dürr Megtec provides a variety wet scrubbers including spray tower, tray tower and packed tower designs for industrial acid gas emissions control.
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
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