Marine FGD Gas Scrubbing/Cleaning Nozzles

Removal of sulfur oxides, commonly referred to as SOx, from the ship exhaust gases of diesel engines using seawater or freshwater (or both)

In 2016, the International Maritime Organization’s (IMO) Marine Environment Protection Committee agreed to reduce the global sulfur emissions limit to 0.5 percent in 2020. 

When heavy fossil fuels are used in combustion processes to run ship engines and boilers, they release SO2 or SO3 as part of the exhaust gas. These sulfur oxides react easily with other elements to form harmful compounds such as sulfuric acid that have the potential to negatively affect human health and the environment. Due to these potential effects, control of this compound in marine flue gases is essential to stay in compliance with the new International Maritime Organization’s (IMO) SOx emission regulations.

There are different types of reliable “wet” scrubber systems to control these emissions: open-type, closed, or hybrid systems. The open-type system uses seawater for scrubbing of marine engine exhaust gas while the closed loop system uses freshwater that has been treated with an alkaline chemical for neutralization and scrubbing. The scrubber spray nozzles are able to effectively and reliably distribute these waters into exhaust cleaning vessels. By creating uniform patterns of properly sized droplets, these nozzles are able to effectively create the surface area needed for proper absorption while minimizing entrainment of the scrubbing water into the flue gas.

Selecting a Marine Scrubbing Spray Nozzle:

Important factors to consider:

  • Required droplet size
    • The correct droplet size is essential to ensuring proper absorption rates
  • Nozzle material
    • As the flue gas is often corrosive and the scrubbing fluid is highly alkaline, selecting the appropriate corrosion and wear resistant material is important
    • We have extensive manufacturing experience with the following materials: Duplex® 2205, 254SMO, and A494 CW2M. 
  • Nozzle spray pattern and placement
    • In order to ensure proper absorption complete coverage of the gas stream with no bypass and sufficient residence time is important
  • Nozzle connection size and type
  • Required scrubbing fluid flow rates
  • Available pressure drop (∆P) across the nozzle
    • ∆P = supply pressure at nozzle inlet - process pressure outside nozzle
  •  Our experienced engineers can help determine which nozzle will perform as required with your design details

Recommended Marine Scrubbing Spray Nozzles:

Materials are an important consideration in marine scrubbers and we have extensive manufacturing experience with the following materials: Duplex® 2205, 254SMO, and A494 CW2M. 

To read more about the marine FGD nozzles we recommend, please click on the series below:

SC full cone whirl nozzles
MaxiPass full cone whirl nozzles
TF spiral full cone nozzles
ST spiral full cone nozzles

Duplex is a registered trademark of ATI Properties, Inc.