Product category:
Filters and Centrifuges
News Release from: Enpure | Subject: Zenon membranes
Edited by the Processingtalk Editorial
Team on 17 February 2004
Zenon membrane for quality water at
Power Station
A new water treatment plant at Ratcliffe on Soar Power Station near Nottingham has been successfully commissioned using membrane water treatment techniques by process engineering contractor Purac
A new water treatment plant at Ratcliffe on Soar Power Station near Nottingham has been successfully commissioned by process engineering contractor, Purac Powergen awarded Purac the GBP1.3 million contract to install a new high purity 90 m3/hr flow process water treatment plant in August 2002 using Zenon membranes to improve the quality of water used for steam raising in the station
This article was originally published on Processingtalk on 23 Sep 2008 at 8.00am (UK)
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High purity water is an essential requirement of all power stations as its quality and security of supply can be critical to the plant operation.
With experience in this field, Purac has recently completed a number of projects installing membrane water treatment plants to reliably produce high purity water.
In addition to Ratcliffe, which is situated next to the River Trent, this includes two new water treatment plants at the West Burton and High Marnham power stations.
Commenting on the completion of this project, Chris Woods, business development manager at Purac, says, "The water abstracted from the River Trent varies significantly in quality throughout the year.
The river is also prone to flooding which can lead to high suspended solids levels and turbidity".
Historically this has caused operating difficulties within the station's existing water treatment plant.
Due to age and the load placed on it by the treatment works, the Ratcliffe ion exchange plant at times also does not perform adequately.
"Our recommendation to improve the treated water quality was to install a new water treatment plant utilising membrane technologies".
The use of Zenon membranes as a pre-filtration process to reverse osmosis was selected.
"Because of their compact nature, the plant was designed to fit into the treatment area without the need to de-commission existing equipment.
This meant we were able to avoid interruption of supply to the power station".
A permeate quality of less than 100mS/cm was achieved by the new plant which is then fed onto existing mixed bed filters for polishing.
The plant was commissioned in advance of the expected winter flood waters in the region, and has reduced the load to the existing ion exchange plant significantly.
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