Transcript 2008 GPP Employee Communication

Configuration – Internally Staged Design
 Principle: Elements with the lowest production and highest
rejection in the first positions and elements with the highest
production in the rear positions of the vessel
 Advantages vs. conventional configuration
• Better hydraulics resulting in lower flux in the front modules:
o
o
Lower fouling potential -> lower energy required
Less cleaning needed -> longer membrane life
• Lower energy requirement for a given production and/or higher
production for a given pressure due to the use of high flow elements
in the rear positions
Internally Staged Design (ISD)
Conventional
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Configuration – Internally Staged Design
6 x SW30HRLE-400i (7,500 gpd)
Recovery system 37.11%
Conventional
6 x SW30ULE-400i (11,000 gpd)
Recovery system 42.42%
1 x SW30HRLE-400i + 1 x SW30XLE-400i + 4 x SW30ULE-400i
Recovery system 41.80%
ISD
1 x 7,500 gpd + 1 x 9,000 gpd + 4 x 11,000 gpd
Internally
Staged
SW30HRLE400i
Design
SW30HRLE-400i
Maximum Flow
Permeate flow rate (cmh)
1.7
1.5
Guideline
SW30ULE400i
1.3
* Feed TDS: 35,000 ppm
Maximum Flow
Guideline
1.1
* Feed pressure: 56 bar
* Feed flow: 12,4 m3/h
0.9
0.7
0.5
0.3
1
2
3
4
5
6
Element Position
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Configuration – Internally Staged Design
Average Flux of the
vessel (L/m2h)
14
15.76
Maximum permeate
flow per element
0.99
0.99
COST (UScts/m3)
Highest FF & T
60.14
58.27
COST (UScts/m3)
Lowest FF & T
63.65
60.05
Highest FF & T
Lowest FF & T
3.1%
5.7%
% savings on cost of
water*
SW30HRLE-400i
SW30XHR-400i
SW30ULE-400i
* COST CALCULATION (TOOLS): CAPEX and OPEX are taken into account. Model is prepared by
a Consulting Company* for Dow (John Tonner Water Consultants International Inc.)
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Configuration – Internally Staged Design
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Configuration – Internally Staged Design
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