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Cooling Tower Filtration Systems Comparative Study
Nouf Sultan Empower Energy Solutions Dubai, UAE
Compare different type of side stream
filters
Statistical filtration
Future filtration plan
Describe Cooling tower
side stream filtration
Empower | Nouf Sultan | Cooling Tower Filtration Systems Comparative Study | 2016 | Slide 1
COOLING TOWER – SIDESTREAM FILTER SYSTEM
Figure 1.1. Cooling Tower Side stream Schematic
Empower | Nouf Sultan | Cooling Tower Filtration Systems Comparative Study | 2016 | Slide 2
COOLING TOWER – SIDESTREAM FILTER SYSTEM
Figure 1.2. Cooling Tower with Side Stream Filtration
Empower | Nouf Sultan | Cooling Tower Filtration Systems Comparative Study | 2016| Slide 3
SIDE STREAM FILTERS BENEFITS
Empower | Nouf Sultan | Cooling Tower Filtration Systems Comparative Study | 2016 | Slide 4
Efficient heat transfer Longer lifetime Better hygiene Better system
efficiency
Effective water treatment program
Less energy consumption
Less chemical treatment cost
Less maintenance
Less corrosion rate
Controlled biological
growth
Empower | Nouf Sultan | Cooling Tower Filtration Systems Comparative Study | 2016 | Slide 5
Particle removal level
Self-cleaning function
Outlet (water loss)
Ease of operation
KEY ELEMENTS
Centrifugal separators Bag filters Screen filters Disc filters
SIDE STRAM FILTERS TYPES
Empower | Nouf Sultan | Cooling Tower Filtration Systems Comparative Study | 2016 | Slide 6
CENTRIFUGAL SEPERATORS
Figure 2. Liquid centrifugal separator , https://commons.wikimedia.org/wiki File:Monostage_centrifugal_extractor.jpg
Advantages : • Less maintenance &
Replacement • Virtually zero water discharge
Disadvantages :
• Longer to discharge tiny particles.
Empower | Nouf Sultan | Cooling Tower Filtration Systems Comparative Study | 2016 | Slide 7
A filter that removes solids from water by the centrifugal force developed as water passes through the device.
BAG FILTER
Advantages : • Less expensive • Flexible adjustment • Increased available surface
area that can effectively remove larger amounts of corrosion debris
• Handling higher flow rates • Reduced energy costs
Disadvantages : • Required regular
replacement • Higher running cost
Figure 5. Bag Filter
Empower | Nouf Sultan | Cooling Tower Filtration Systems Comparative Study | 2016 | Slide 8
A type of filter that works by the principle of microfiltration where it purifies the liquid in bags by passing small permeable pores.
SCREEN FILTER (Self-Cleaning)
Advantages : • Relatively
inexpensive. • High removal
effeciency
Disadvantages : • Required frequent
maintenance • Higher back wash
Figure 4. Screen Filter
Empower | Nouf Sultan | Cooling Tower Filtration Systems Comparative Study | 2016 | Slide 9
A type of filter that uses a flexible screen to separate sand and other fine particles out of water for irrigation or industrial application
DISC FILTER
Figure 3. Disk Filter model
Advantages : • Less maintenance • Automatic Self-cleaning • Remove both solids &
organic effectively • Lower operating cost
Disadvantages : • Moderate Filtration
performance
Empower | Nouf Sultan | Cooling Tower Filtration Systems Comparative Study | 2016 | Slide 10
A technology that uses plastic discs made of polypropylene that are stacked together under pressure and grooved to filter particles of specific micron sizes.
Centrifugal separators Bag filters Screen filters Disc filters
Case Study
Empower | Nouf Sultan | Cooling Tower Filtration Systems Comparative Study | 2016 | Slide 11
CENTRIFUGAL SEPERATOR (40-75 microns)
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
0 10 20 30 40 50 60 70
% R
emov
al
Particle size µ
Particle Size Distribution - Centrifugal
% Removal
Empower | Nouf Sultan | Cooling Tower Filtration Systems Comparative Study | 2016 | Slide 12
• Less efficiency at lower particle size
• Almost negligible backwash
DISC FILTER (50 microns)
Empower | Nouf Sultan | Cooling Tower Filtration Systems Comparative Study | 2016 | Slide 13
• Higher efficiency than Centrifugal
• Removal up to 60% of particle lower than filter rating
• Has moderate backwash rate
0%
10%
20%
30%
40%
50%
60%
70%
0 10 20 30 40 50 60 70
% R
emov
al
Particle size µ
Particle Size Distribution - Disc Filter
% Removal
SCREEN FILTER (50 microns)
0%
10%
20%
30%
40%
50%
60%
70%
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90%
100%
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% R
emov
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Particle size µ
Particle Size Distribution - Screen Filter
% Removal
Linear (% Removal)
Empower | Nouf Sultan | Cooling Tower Filtration Systems Comparative Study | 2016 | Slide 14
• Highly efficient • Removal up to 100% of particle
at the filter rating. • High back wash quantities
BAG FILTER (10 micron)
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
0 10 20 30 40 50 60 70
% R
emov
al
Particle size µ
Particle Size Distribution - Bag Filter
% Removal
Empower | Nouf Sultan | Cooling Tower Filtration Systems Comparative Study | 2016 | Slide 15
• Low efficiency • No Backwash , but high running
cost (consumables)
FILTER TYPE PARTICLE REMOVAL %
ADVANTAGES & DISADVANTAGES
Centrifugal separator
15% Not suitable for removing lower size particles, less efficiency
Bag filter 20% High running Cost (consumable)
Screen Filter 100% Water consuming
Disc Filter 60% Extremely efficiency, balanced back wash
CONCLUSION
Empower | Nouf Sultan | Cooling Tower Filtration Systems Comparative Study | 2016 | Slide 16
RECOMMENDATION
Empower | Nouf Sultan | Cooling Tower Filtration Systems Comparative Study | 2016 | Slide 17
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