ALL ABOUT
SOx SCRUBBERS

AEC Maritime offers three types of scrubbers. On this page we will give you some more information on these scrubbers. Want to get into the specifics? Give us a call or download the brochure.

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SOx SCRUBBER BASICS

Scrubbers are designed to reduce 99% of sulphur emissions while using regular HFO fuels. How does this work?

AEC offers an unique all-in- one solution that cools gases, removes sulphur and eliminates almost all particulates at the same time. The scrubber has an open tower structure without moving parts.


AEC scrubbers are extremely compact and always tailor made, designed to fit the space available in new build or retrofit. AEC offers closed loop scrubbers, open loop and hybrid scrubbers. These three systems have an inline configuration, where the scrubber is directly attached to the engine(s), which makes the system even more compact.

Closed loop scrubbers

The closed loop is the most frequently used system. The seawater used in the process is continuously re-circulated. Detailed information can be found in our brochure. Download here.

How does it work?

  • From the bottom of the scrubber exhaust gases are led through the scrubber to the top.
  • The seawater is fed into the top of the scrubber through nozzles. This results in an equally divided spray.
  • The outgoing exhaust gases are washed with seawater in the scrubber.
  • The seawater (process water) is continuously re-circulated.
  • The sulphur in the exhaust gases dissolves in the process water pumped from a circulation tank and binds with the caustic soda (NaOH) as a salt.
  • Based on conductivity level a certain amount of process water is drained out of the system automatically.
  • If needed clean seawater is then added to the process water tank and also NaOH, if needed.
  • The process water is pumped through the separator.
  • This separator will separate solids and oil from the process water.
  • The remaining sludge is pumped to the sludge storage tank on the ship.
  • The process water with high conductivity level will be discharged directly back to sea while complying fully to the IMO regulations.
  • The pH, turbidity and concentration of PAH are constantly measured in accordance with MARPOL Annex VI resolution MEPC.184 (59).
  • The clean exhaust gases exit the scrubber, removed from sulphur and particulates, through a demister.

Open loop scrubbers​

Instead of being re-used, the process water is discharged directly back to sea while complying fully to the IMO regulations. Optionally the seawater can be pumped through a water treatment system to remove all solids and oil. Detailed information can be found in our brochure. Download here.

How does it work?

  • The seawater (process water) is NOT re-circulated but discharged back to sea.
  • The sulphur in the exhaust gases dissolves in the process water.
  • The process water is pumped through a water treatment system and discharged back to sea.
  • Solids and oil from the process water are led to the separator.
  • This separator will separate solids and oil from the process water.
  • The remaining sludge is pumped to the sludge storage tank on the ship.
  • The process water removed from solids and oil will be discharged back to sea.
  • The pH, turbidity and concentration of PAH are constantly measured in accordance with MARPOL Annex VI resolution MEPC.184 (59).
  • The clean exhaust gases exit the scrubber, removed from sulphur and particles, through a demister.

Hybrid scrubbers​

The hybrid scrubber system can run in both closed or open loop mode. Water is either re-circulated or discharged back to sea.