Ecomb AB

- Combustion Processes System

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The Ecotube system represents an innovative cost-effective optimisation tool for combustion processes and principally comprises retractable lances - Ecotubes - that are equipped with injection nozzles. Various agents can be introduced through the nozzles at high pressure and velocity into the furnace media. The Ecotubes are strategically positioned within the furnace enabling the injected agents to create a radically improved mixing of the combustion products, resulting in destruction of laminar gas columns and the formation of completely mixed turbulent flow patterns.

Ecotube system advantages by comparison with other emission abatement techniques:

  • Engineered for retrofit applications
  • Lower plant operation costs
  • Radically improved turbulence and mixing of combustion   gases
  • Reduced NOx, CO, SOx, HCl and particles in the flue gas
  • Lower stoichiometric ratio (less excess air) in the furnace
  • Increased thermal efficiency
  • Increased load capacity
  • Lower ID fan motor absorbed power
  • Reduced boiler-wall metal corrosion
  • Reduced erosion of boiler convective surfaces
  • Minimum unit down time (3-4 days) needed for installation
  • Lower maintenance costs
  • No large ducts or furnace modifications required

Common combustion problems WITHOUT Ecotubes
Combustion Problem Areas are:

  • Poor mixing/laminar flue gas flow
  • Uneven temperatures and gas velocities
  • Non utilized furnace volumes
  • High NOx
  • Frequent CO spikes
  • High SNCR reagent consumption
  • High ammonia slip

Combustion WITH Ecotubes
Financial Benefits

  • Increased waste throughput
  • Increased steam flow
  • Reduced flue gas flow
  • Reduced fly ash carry-over
  • Reduced flue gas temperatures in convection pass

Environmental Benefits

  • Reduced emissions of NOx, SOx, CO, NH3 and CO2
  • Increased residence time in temperatures >850°C
  • Radically improved mixing
  • Distruction of laminar gas content
  • Reduced NOx, CO, SOx, HCL and particles
  • Lower stoichiometric ratio possible

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