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Function - Exhaust contains pollutants of NOx, SOx, Particulates. scrubbing systems remove SOx and Particulates.

Exhaust - Sea water passes through at 45 t/h/MW. This traps the particulate;

calcium carbonate in the sea water reacts with and neutralises SOx. System

operates with a low back pressure. Clean dry gas then leaves the system.

Water - Contaminated water from the scrubber to a treatment plant in the

engine room. Clean water is discharged to the ocean with a slightly higher

calcium sulphate content than on entry.

Waste - An oily waste is generated from the water treatment plant which

normally goes into the vessels existing oily waste tank.

Monitoring – the system has secure monitoring and data storage for both

exhaust and water discharge.

 

sulphur fuel oil?

For the main emissions being studied and legislated for (SOx, NOx and PM)

scrubbing will be much cleaner with regard to SOx and PM.(100% and 80%

reduction). Neither will do much to reduce NOx

Can the scrubber be used in conjunction with SCR technology to reduce

NOx?

The answer is yes, but there are considerations to be taken into account such as

back pressure effect, SCR technology works better with low sulphur fuel

What are the main applications for sea water scrubbing on board merchant

ships?

The main applications for sea water scrubbing on board merchant ships are for

main engines, auxiliary engines, and boilers. It is not normally economic to apply

sea water scrubbing to combustion plant using distillate fuel, (diesel), or plant

which only consumes small quantities of high sulphur marine bunker fuel and

where a switch to distillate fuel is more economic