Alfa Laval PureSOx Scrubbers With WCS Install Aboard Mega Box Ship

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  • Two Alfa Laval PureSOx scrubbers with a shared water cleaning system (WCS) have been installed aboard Ever Ace.
  • Alfa Laval said its WCS design was recently updated, providing additional modular options to ensure a compact and cost-effective fit.
  • Alfa Laval revealed that along the route, the WCS could be observed during longer periods with high engine loads.

Two Alfa Laval PureSOx scrubbers with a shared water cleaning system (WCS) have been installed aboard Ever Ace, the largest box ship sailing the seas, says an article published on Riviera website. 

Alfa Laval PureSOx scrubbers on board

To clean the engines’ exhaust gas, Ever Ace features two Alfa Laval PureSOx scrubbers on board – one for the main engine and one for the auxiliaries. 

These hybrid scrubbers can operate on open or closed loop, and require effective cleaning of the closed-loop circulation water. This is provided by a shared WCS based primarily on high-speed centrifugal separation.

Updated design 

Alfa Laval said its WCS design was recently updated, providing additional modular options to ensure a compact and cost-effective fit. On mega-container vessels with high engine power, it allows for greater capacity by adding flocculation to the centrifugal separation at its heart.

In the case of Ever Ace, the WCS incorporates three high-speed separators, flocculator modules and a feed pump. Though it serves two PureSOx scrubbers with a combined exhaust gas cleaning capacity of almost 200 t/h, the WCS has a minimal footprint in relation to its high efficiency.

Evaluates PureSOx scrubbers aboard mega box ship

The shared WCS was the first with the new design to be commissioned by the PureSOx team. The limited gas load during a short shipyard sea trial was not enough to test the full WCS cleaning capacity, so Alfa Laval experts followed Ever Ace during a September journey from the UK to Germany and the Netherlands for a more thorough WCS evaluation, for crew training and to resolve open items after leaving the shipyard.

Alfa Laval revealed that along the route, the WCS could be observed during longer periods with high engine loads. Cleaning performance was high throughout the voyage, even when much larger amounts of circulation water reached the WCS. 

Built by Samsung Heavy Industries and owned by Taiwan’s Evergreen Marine Corporation, Ever Ace is the first of 12 vessels planned for Evergreen’s record-breaking A Class, which comprises container vessels of nearly 24,000 TEU capacity. Powered by a massive main engine of nearly 60 MW, it also has five auxiliary engines of 4.5 MW each.

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Source: Riviera