Novel Integrated Desulphurization (NID) - EKP Unit 3

Novel Integrated Desulfurization (NID)

The semi-dry desulfurization combines the injection of a suspension/solution of alkaline reagent into the sulphur-rich flue-gases before removing the resulting product by filtration (Fabric Filer or Electrostatic Precipitator).

In ANDRITZ NID technology, the lime slurry solution is mixed with recirculating dust before being injected in the so-called J-Duct where the SO2 and other acid gases (SO3, HCl, HF, …) undergo various reactions before being removed from the flue gases. Depending on the flue gases composition and the level of emissions reduction to achieve, an optimized recirculation rate is set before removing the end products in the Fabric Filter or Electro Static Precipitator.

ANDRITZ NID integrated process offers a compact design translating into a reduced footprint. The possibility to use many sorbents enables ANDRITZ NID technology to act as a multi-pollutants control equipment, particularly in industrial applications with fuels having challenging or variable compositions. Also, ANDRITZ is actively collaborating with filter bag manufacturers to offer for selected processes the lowest emissions guarantees and longest bag lifetime in the market.

Novel Integrated Desulphurization (NID) - EKP Unit 3


The key features of ANDRITZ NID are:

  • Up to 98% SO2 removal (with fuels up to 4% sulphur in coal)
  • Multi-pollutants control (PM, SO3, HCl, HF, ...) and when combined with other sorbent injection (PAC, …) enables an efficient capture of heavy metals (Hg, …) and other components
  • Benefits key proprietary FF design features (OPTIPOW valves, advanced controller, long bags, …)
  • Compact footprint
    (less than 50%, compared to Spray Dryer Absorber (SDA))
  • Modular and standard design to reduce construction costs and provide scalability from small up to very large projects
  • Optimized operation costs
  • Simple operation and maintenance, with more than 25 years of operation
  • Collaboration with filter bag manufacturers to offer the lowest emissions guarantees and longest bag lifetime in the market
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