The document discusses the advantages of side stream filtration and ozonation for cooling towers, highlighting key benefits such as reduced chemical usage, decreased blowdown, and enhanced heat transfer efficiency. It provides cost analysis for a specific client, Cipla, indicating significant monthly savings on chemical applications and a return on investment of less than 16 months for the ozonator installation. Additionally, it outlines necessary precautions and optimal operational parameters for effective ozone generation in cooling tower systems.

1. Rethink Cooling Towers
Side Stream Filtration
&
Ozonation

2. Typical Cooling Towers
• Cooling Tower Capacities
• Flow rates
• TSS
• Microbiological load
• Fouling
• 500 TR – 5,000 TR
• 500 – 5,000 m³/hr
• 30 – 50 ppm
• 10 – 10 MPN
• Slime
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3. Concern areas
• Environment pollution - dirt (TSS)
• Slime formation
• Scaling
• Corrosion
• High dissolved solids - TDS
• Microbiological growth
• Formation of organic impurities
• Frequent blow down
• Efficiency

4. Requirement
Customiz
ation
Optimiz
ation
Integrat
ion

5. Solution
• Main stream or side stream filtration
• Optimized diffusion of Ozone

6. Solution - Filtration
• Side stream filtration of 8 – 12 % of mainstream flow
• Automatic Self cleaning filter
• Pressure Sand Filter

7. Advantages - PSF
• Worldwide proven technology
• Depth Filtration
• Excellent for fine silt
• Online
• Very low waste water
• Long life
• Negligible maintenance

8. Ozone Generation
Oxygen Preparation
Ozone Generation
Ozone Injection
Ozone Diffusion
Ozone Contactor

9. Oxygen Preparation
• Oxygen From Ambient Air
• Oxygen concentrator
• More than 90% concentration
• Dry Industrial Grade Oxygen

10. Ozone Generator
• High voltage, High frequency Generator
• SS 316 Grade Ozone Cell
• High Efficient Enameled Cell
• Ozone Cell safety circuits
• Dual Electrode Water Cooled Ozone Cell
• Ozone under –ve Pressure

11. Ozone Injection & Diffusion
• Venturi Ejector
• Sparger
• Chemone Diffuser cum Contactor
• Valves, pumps etc
• Water Trap
• Ozone Vent

12. Advantages - ozonation
• Considerable reduction in the use of chemicals except for pH
balancing
• Greatly reduces Blowdown
• Ends discharge liabilities and chemical storage record keeping
• Destroys all types of microorganisms instantly
• Minimizes condenser fouling
• decomposes organic waste by oxidation

13. Cont....
• removes existing calcium carbonate scale by destroying the
biomass glue bonding agent
• the most environmentally friendly oxidant
• reduces the corrosion rate of metals, including copper heat
exchangers
• saves on energy costs by increasing the heat transfer
efficiency of the chiller

14. Reduction of Operating Costs
• Ozone reduces makeup water to the cooling tower by
permitting more cycles between blow downs.
• Reduces the cost and problems in ordering, shipping, handling,
storage, and disposal of regular chemicals.
• Reduces power consumption by keeping the chiller heat
transfer efficiency high through cleaner condenser tubes.

15. Client : CIPLA Application : Cooling Tower WTP
Present Cost
Expected Savings
In ChemicalsSite : Goa CT Capacity : 600 TR x 06 nos.
Chemicals Application Quantity Rate/Kg Cost/Month Savings Quantity Cost/Month
Kg/Month INR INR In % Kg/Month INR
Nalco-73385 BIOCIDE 30 885 26,550 50 15 13,275
Nalco-73550 BIODETERGENT 18 780 14,040 50 9 7,020
Nalco-7320 CONTROL MICRO-ORGANISM 30 510 15,300 50 15 7,650
Nalco-7330 BIOCIDE 30 272 8,160 50 15 4,080
3DT-189 COOLING WATER TREATMENT 150 345 51,750 NIL 150 51,750
Nalco-3935 CONTROL MICROORGANISM 1,200 62 74,400 50 600 37,200
3DT-190 COOLING WATER TREATMENT 36 460 16,560 NIL 36 16,560
Sulphuric Acid 300 0 NIL 300 0
Sodium Hypochlorite 1,200 21 25,200 50 600 12,600
Total 231,960 150,135
Total Cost Savings Per Month Rs. 81,825
Total Cost Savings Per Year Rs. 981,900
Ozonator Cost (Supply + I & C + P & F + Tax) Rs. 1,345,000
Return On Investment [ROI] - Less than 16 months Yr 1.37
Reduction In Blow Down Water Quantity - Approx. 25 - 30 %

16. Installation Scheme
Process Flow
Diagram
Suitable For
100 TR – 500
TR

17. Installation Scheme
Process Flow
Diagram
Suitable For
300 TR – 5,000 TR

18. Installation Precautions
• The feed gas preparation must include removal of particulate
matter, moisture and oil.
• Make-up water should be free from sediment, mud, and
discoloration
• Material of construction in the ozone treated system should be
compatible with ozone
• The ozone generator should be located in an air conditioned area
for best ozone generation efficiency

19. Ozone Doze
• 2.0 – 3.5 ppm in side stream water flow
• 0.2 – 0.4 ppm in main stream water flow

20. Thanks
Chemtronics Technologies (India) Pvt. Ltd.
Solution Engineer : Mr. Sunil Shah - +91-93212 34527
E mail : sunilshah@chemtronicsindia.com
www.chemtronicsindia.com
www.ozonegeneratorindia.com