Filtration for Flue Gas Desulfurization Make-up Water, USA
Country
USA
Application
Cooling Water
Water source
Mobile River
Filtration solution
Stage 1: 2 x EBS 15K (300 micron)
Stage 2: Seven Pod 10” Super Galaxy (100 micron)
Background
A filtration system was required to provide all service water for the FGD (flue-gas desulfurization) scrubber facility at the coal and natural gas-fired electrical generation facility in Bucks, Alabama, USA. Water use is primarily for the FGD system but other uses include seal water, wash-down water and emergency/fire suppression water. The second stage Super Galaxy system was installed after the customer realized that the existing “first stage” filtration system was not preventing an accumulation of several feet of “mud” in the storage tank, resulting in the need for periodic clean-out. The goal of the added second stage was to reduce the amount of mud accumulation, thus extending the interval between manual clean-out while also providing better water quality to the facility.
Challenge
The customer had 2 EBS-15K filters with 300 micron screens (sold in 2008), raw Mobile River water, traveling screen at intake, extremely muddy source, feed to tank (after filtration) and the tank was building up mud.
Solution
The existing EBS filter system with 300 micron filtration was not a fine enough system to remove the finer mud in the river water source, so it was clear that a second stage was needed to reach a finer degree of filtration. Stage One: Two EBS-15K: 300-micron. Stage Two: Seven Pod 10” Super Galaxy: 100-micron, 3800 GPM (863 m3/h), controller integrated into customer’s control system.
Results
The Spin KlinTM system reduced the turbidity (NTU) by 50%. The filter is catching small silts and organics, thus reducing the need for flocculants and chemicals added before FGD use. Emergency testing at another water treatment research site on the plant’s grounds proved the ability of the Spin KlinTM technology to handle this poor quality raw river water. In fact, testing results were so good that all future projects requiring water filtration at this plant now default to the use of the Spin KlinTM filters. The success of this installation has led to 2 additional installations at this facility and the excellent performance from the first test site and from this project have led to Amiad being the sole source manufacturer (no open bid).
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