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Implement SOLVAir® bicarbonate process for flue gas cleaning

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Switching your APC system to the SOLVAir® bicarbonate process will certainly be the solution of choice when there are changes in regulation, fuels or increasing needs to improve the energy recovery. 

The SOLVAir® bicarbonate process enables to easily reach the most severe limits while minimizing the quantity of reagents needed and limiting the amount of residues produced.
Air Pollution Control (APC) systems are designed accordingly to local constraints. Nevertheless, little by little, the context evolves as for instance: 

  • the environmental regulations becomes more severe
  • fuel quality changes with more pollutants, especially in waste to energy plants
  • reagent consumption greatly increases. Residual production rises even quickly
  • pollutants peaks suddenly appear and APC is not able to absorb them
  • energy prices growth justifies some investment to recover and/or save energy
  • energy efficiency parameter (R1 factor) is below 0,6 / 0,65, values that classify the plant as disposal and not as waste to energy recovery
  • landfill prices for residuals increase
  • liquid effluents become very complex and costly to treat 

In almost all cases described above, switching the plant to the SOLVAir® bicarbonate process is the most efficient solution with the lowest capital expenditure

Implementing the process is very easy if a bag filter is already installed. The only additional equipments needed are: a grinder-dosing station and a pneumatic injection into the flue gas duct before the filter. If the plant is equipped with an electrostatic precipitator (ESP), adding after this device a bag filter might give the opportunity to recycle the Residuals Sodium Chemicals (RSC). 

The extended working temperature range avoids cooling with water injection, giving the possibility to recover more energy in the clean gases, without reheating before catalytic DENOX.