Clean air

clean solution

Dry Flue gas cleaning

Optimum emission reduction with sodium hydrogen carbonate (NaHCO3)

Dry sorption processes for purifying gaseous inorganic pollutants are playing an increasingly important role in reducing emissions. This is reflected in the significant market shares they have now achieved: they are already pioneers in Europe and Korea; China and large parts of Asia are following suit. The facts are clear: flue gas cleaning with sodium hydrogen carbonate has long proved its worth and is now the state of the art.

Sodium hydrogen carbonate performs excellently in cleaning of  flue gas. Particularly when incinerating waste, scrap tyres and other critical materials outstanding cleaning effects are achieved using sodium hydrogen carbonate: the pollutants HCl and SOx can thus be separated from the flue gases, thereby reducing emission.

  • Several hundred installed  systems all over the world
  • Operation in diverse industries like in Steel plants, Waste incineration plants etc.
  • Compact arrangement
  • Tried and trusted technology for emission reduction
  • Less cleaning effort due to good accessibility

The Cleaning Process

The sodium hydrogen carbonate is continuously conveyed from a silo through a volumetric screw feeder to the core component in the grinding process, the APP Classifier Mill, where the sodium hydrogen carbonate is comminuted.
The sorbent is conveyed pneumatically to the flue gas channel by the air flow generated by the fan.
Here the chemical reaction takes place. Hydrogen chloride and sulphur oxides are bound to the sodium hydrogen carbonate and are separated on the filter. The cleaned flue gases escape through the chimney. The sorbent with the bound pollutants is collected under the filter.

Flue gas cleaning: Example picture waste incineration plant

Plant capacities for standard sizes

(for d90 = 20 µm).
Machine sizes 160 APP 200 APP 315 APP 400 APP 500 APP 750 APP
Mill drive [kW] 11 22 37 55 75 160
Nominal capacity [kg/h] 160 270 550 800 1.250 2.250
Extended capacity [kg/h] 200 320 600 1.000 1.500 2.700
Usual machine sizes with the corresponding capacities (for d90 = 20 µm)
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Brochure Flue gas cleaning
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Planning the entire process

It’s not just building a machine – we support your projects from consulting trough to maintenance.