january 201101 principle: elements with the lowest production and highest rejection in the first...
DESCRIPTION
January Average Flux of the vessel (L/m 2 h) Maximum permeate flow per element 0.99 COST (UScts/m 3 ) Highest FF & T COST (UScts/m 3 ) Lowest FF & T % savings on cost of water* Highest FF & T Lowest FF & T 3.1% 5.7% SW30HRLE-400iSW30XHR-400iSW30ULE-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.) Configuration – Internally Staged DesignTRANSCRIPT
January 20110 1
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 Lower fouling potential -> lower energy requiredo 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
Configuration – Internally Staged Design
Internally Staged Design (ISD)
Conventional
January 20110 2
6 x SW30HRLE-400i (7,500 gpd) Recovery system 37.11% 6 x SW30ULE-400i (11,000 gpd)Recovery system 42.42%1 x SW30HRLE-400i + 1 x SW30XLE-400i + 4 x SW30ULE-400iRecovery system 41.80%
* Feed pressure: 56 bar* Feed TDS: 35,000 ppm* Feed flow: 12,4 m3/h
1 x 7,500 gpd + 1 x 9,000 gpd + 4 x 11,000 gpd
0.3
0.5
0.7
0.9
1.1
1.3
1.5
1.7
1 2 3 4 5 6Element Position
Perm
eate
flow
rate
(cm
h)
SW30HRLE400i
Maximum FlowGuideline
0.3
0.5
0.7
0.9
1.1
1.3
1.5
1.7
1 2 3 4 5 6Element Position
Perm
eate
flow
rate
(cm
h)
SW30HRLE-400i
SW30ULE400i
Maximum FlowGuideline
0.3
0.5
0.7
0.9
1.1
1.3
1.5
1.7
1 2 3 4 5 6Element Position
Perm
eate
flow
rate
(cm
h)
Internally StagedDesignSW30HRLE-400i
SW30ULE400i
Maximum FlowGuideline
Conventional
ISD
Configuration – Internally Staged Design
January 20110 3
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
% savings on cost of water*
Highest FF & T Lowest FF & T
3.1%5.7%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.)
Configuration – Internally Staged Design
January 20110 4
Configuration – Internally Staged Design
January 20110 5
Configuration – Internally Staged Design