Product category:
Pure water: UV and Membrane systems
News Release from: Elga Process Water | Subject: Aquamove Moro and Modi
Edited by the Processingtalk Editorial
Team on 09 January 2007
Raw water problem solved at Shoreham
Power Station
Elga Process Water has assisted Shoreham Power Station maintain the quality of treated water intakes despite seawater infiltration into bore-holes, using temporary mobile RO and ion exchange units
Elga Process Water assists Shoreham Power Station when raw water quality changes High purity water is critical to a wide range of industries, but nowhere more so than in power generation, where loss of high purity water can shut down generation in a matter of hours
This article was originally published on Processingtalk on 17 Dec 2002 at 8.00am (UK)
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It consumes 15m3/h of high purity boiler make-up water supplied from a two stream ion exchange demineralisation plant using counter flow, packed bed regeneration technology and delivering make-up water with a conductivity of less than 0.1uS/cm.
The raw water that supplies the demineralisation plant is drawn from boreholes close to the coast, and normally has a conductivity of around 500uS/cm.
The succession of dry winters, which is currently causing water supply problems across the south of England, has resulted in a fall in the water table in the area around Brighton.
This has allowed sea water to intrude into the boreholes causing problems for Station Chemist, Keith Carter: "It's more than just a sea water intrusion problem," he says, "We installed an on-line sodium monitor and this showed a wide variation in concentration that was quite clearly linked to the tides".
The demineralisation plant was designed to produce 120m3 of treated water between regenerations, but the deteriorating water quality reduced this to less than 40m3 and also caused an increase in the conductivity of the treated water output.
"The increase in sodium concentration ultimately led to a complete failure of the demineralisation plant" says Keith, "We decided to install a reverse osmosis plant upstream, but the project was going to take several months and we had an immediate problem".
The answer to that immediate problem was provided by Elga Process Water in the form of an Aquamove mobile water treatment system.
The temporary plant consisted of an Aquamove Moro mobile reverse osmosis unit and an Aquamove Modi ion exchange system.
The Modi units are standard 40' trailers which are insulated and supplied with heating, lighting and all necessary safety equipment and just need to be connected to the water supply.
The Moro units are 20' containers similarly fitted out.
"We initially rented the Modi trailer to get over the short term problem," says Keith, "and then continued to rent the Moro reverse osmosis container to provide pre-treatment until our new reverse osmosis system was installed and commissioned".
With water resources coming under increasing stress, changes in raw water quality, like that experienced by Scottish Power at Shoreham, are becoming increasingly common, and the Elga Process Water Aquamove fleet are there to help! Units can usually be on the road within two hours of a customer's call to the emergency helpline - any time, day or night, 365 days per year.
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