Flue gas cleaning

Flue gas ducts

Rapla Metall designs, dimensions and manufactures flue gas ducts. We also insulate smoke ducts. We make ducts from black metal, Cor-Ten steel as stainless steel.


  • Individual solution according to the layout of the equipment
  • Insulation works
  • Wide range of materials
  • Certified and inspected production


The multicyclone is a passive flue gas cleaning element, utilizing centrifugal forces to remove particles from the flue gas flow. The bottom of the multicyclone is a hopper under which is a rotary valve for evacuating accumulated dust into an ash screw. The rotary valve is operated by a heavy duty gearmotor.


  • Reliable and efficient solution
  • Robust design
  • Larges mainentance hatches
  • Low maintenance cost
  • Individually solution according to energy plant
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