SCR (Catalysts)

Preventive, automatic cleaning method for all types of dry ash in SCRs. Typical results are:

  • Solving clogging problems inside the catalyst elements.
  • Reduced steam/air consumption of soot blowers by 70-100%.
  • Reduced wear on catalyst from soot blowers or erosion due to partially blocked catalyst elements.
  • A single unit, with low maintenance needs, is generally needed for a large cleaning area, such as an entire SCR reactor.


To meet future emission levels it is important to keep the SCR (Catalyst) as clean as possible to maximize its lifetime and efficiency.

Preventive, automatic Infrasound soot cleaning is a method that results in substantial savings due to the unique physical properties of non-audible sound. A major advantage of the infrasound technology is the far reaching, non-abrasive cleaning effect compared to reactive cleaning methods with only local cleaning effect,  i.e. steam soot blowing, compressed air soot blowing or acoustic cleaning using audible frequencies (sonic horns).

Steam soot blowing is a cleaning method best suited for cleaning of heat transfer surfaces in high temperature areas such as superheaters, where deposits are created due to molten components in the ash. For sonic horns, the sound intensity is in contrast to infrasound attenuated quickly with distance from the horn.

Heat Management’s infrasound generators are the most powerful infrasound sources on the market. The infrasound has high intensity in all parts of the elements regardless of pitch and shape (honeycomb, plate, etc.). Sound is screened only by objects with size comparable to the wavelength of the sound. Since infrasound has a very long wavelength of about 20 meters the attenuation of sound energy when passing a catalyst element is very small and the sound pressure/turbulence created in the flue gas is very large.

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