Michaelis GmbH & Co. KG

Clean Air Technology: Wet Gas Cleaning

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According to the local emission regulations particles or gaseous pollutants have to be removed from the flue gas.

A wet waste gas cleaning system consists of the following main components:

  • Possibly a heat exchanger for heat recovery respectively for reheating the flue gas.
  • Possibly a multi-cyclone unit / electrostatic filter for dust removal.
  • Quencher as venturi scrubber or pipe quench.
  • Scrubber for absorption of the gaseous pollutants.
  • Possibly wet electrostatic precipitator for aerosol removal.
  • Possibly an activated carbon adsorber for heavy metal or dioxin removal.
  • Combination of different processes according to the particular demands on removal efficiency.

The following absorbent agents are applied:

  • NaOH, other bases
  • Limestone
  • H2SO4
  • H2O2

Operational experiences:

  • Clean gas concentrations of less than German 17. BImSchV are achievable
  • Particle removal efficiency up to 99,9 %
  • SO2-removal efficiency up to 99,5 %
  • HCl-removal efficiency up to 99,5 %
  • Great operational experiences with this technology

Advantages:

  • Comparatively low investment cost
  • Well proved technology
  • High removal efficiency for pollutants
  • Nearly maintenance-free
  • Nahezu wartungsfrei
  • Absorbents and reaction products are available as liqu
  • High reliability

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