Alfa Laval PureSOx U design
Swedish heat and fluid specialist, Alfa Laval, has announced that its PureSOx scrubber is now available in a U-design with greatly reduced dimensions.
The PureSOx is a U-shaped configuration where the jet and absorber sections are separated by a natural water trap. In the updated version the exhaust gas flow through the scrubber has been heavily optimised, allowing for a reduction in scrubber height as well as a reduction in weight.
“We have a strategy of continuous development for the Alfa Laval PureSOx platform,” said René Diks, manager of marketing & sales, exhaust gas cleaning at Alfa Laval. “We launched our inline I-design in December 2015, and we are pleased to follow it so soon with significant advances in our U-design.”
A key factor in achieving the reductions was the minimisation of back pressure, which has been done entirely without exhaust gas fans.
A smaller scrubber facilitates placement and reduces installation costs, while a lighter scrubber reduces the impact on vessel stability. In some cases, the smaller U-design may also be placed lower in the ship, which will have further stability benefits.
Coinciding with the arrival of U-design improvements is a renewed sense of urgency surrounding SOx scrubbers. At MEPC 69, which convened in London in late April, it was agreed that the question of a global 0.5% fuel sulphur cap would be resolved at MEPC 70 in October.
Whether the cap appears in 2020 or 2025 will hinge on a study by CE Delft, which will report on the availability of low-sulphur fuel. The study, prescribed by MARPOL Annex VI regulation 14.8, is being supervised by a steering committee consisting of member states, non-governmental organizations and one intergovernmental organisation.
“It is impossible to speculate on the outcome of the study or of MEPC 70,” said Mr Diks. “But scrubber technology will be considered in assessing the adequacy of the fuel supply. PureSOx has shown that SOx limits can be met reliably, even without low-sulphur fuel.”
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