Sludge oil with up to 50% water content
The IMO standard for sludge oil states that there is 20% water in the sludge oil. Ship Owners often have more water than this so it is important that the incinerator can also cope with higher water contents than the IMO standard.
Many Owners use an extra tank to settle the water out, but this is both time consuming for the crew and takes up more space in the engine room. Some Owners heat up the sludge oil tank to 100°C to evaporate the water and exhaust it to the atmosphere, but evaporating requires a lot of energy and is also time consuming, so is not the perfect solution either.
Atlas Incinerators therefore recommend a 1-tank system since it is much simpler to operate one tank automatically than two tanks manually. By not using a settling tank the crew will save time, not needing to settle water out. An additional benefit with burning high water contents is that one can burn higher volumes of sludge oil, due to the cooling effect of the water, and NOX emissions are also reduced.
Sludge oil treatment tanks are delivered with a circulation pump and a mill pump for agitation and comminution of the tank contents. This makes it possible to burn oil sludge with up to 50% water content, without adding additional diesel oil to the burners or having to drain the tanks.
The sludge oil mixing tanks are available with heating by steam, electricity or thermal oil.