Dürr MEGTEC, LLC

- Wet Scrubbers for Acid Gas Absorption

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

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  • 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, including SOx (SO2 and SO3), HF, and HCl
  • Not susceptible to plugging
  • Small footprint
  • Low capital equipment and installation cost

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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

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