Articles & Case Studies

Power station filter gets perfect makeover

Posted: Tuesday 21st December 2010

A FILTER that is deployed by Deeside power station has been expertly refurbished by Croft Engineering Services.

The Hammerhead intake filter – which weighs 650kg – was delivered to Croft’s headquarters in Warrington by Deeside Power, of Flintshire, so it could be cleaned and repaired before re-installation.

The filter was in a very sorry state when reached Croft: both cylindrical ends were full of holes and severely corroded, there were numerous split or corroded welds and it was covered in barnacles.

To top it all, the filter – which sits an impressive 2.9 metres long and 1.4 metres high – stank to high heaven after a lifetime in the River Dee estuary filtering water to be used by the power station to create energy.

Before starting the refurbishment, Croft engineers immediately cleaned out the seaweed, sand and silt that had accumulated inside the filter because of its back flush construction.

They then set about the repairs, fabricating the filter in copper-nickel 90-10 and adding a small stainless steel pipe. Work took around 125 hours.

The newly-cleaned and repaired Hammerhead was then picked up by Deeside Power and taken back to the River Dee Estuary to be re-installed by a team of diving engineers.

Philip Keeley, of Deeside Power, said: “We are absolutely delighted with the quality of repair by Croft Engineering Services.”

Croft’s partner, Neil Burns, said: “Croft was able to accommodate the client’s needs.

“Although upon receipt of the product more work was discovered than was initially quoted for, we were still able to meet the deadline and exceed the customer’s expectations.”

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