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Rethink Cooling Towers
Side Stream Filtration
&
Ozonation
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
62
Concern areas
• Environment pollution - dirt (TSS)
• Slime formation
• Scaling
• Corrosion
• High dissolved solids - TDS
• Microbiological growth
• Formation of organic impurities
• Frequent blow down
• Efficiency
Requirement
Customiz
ation
Optimiz
ation
Integrat
ion
Solution
• Main stream or side stream filtration
• Optimized diffusion of Ozone
Solution - Filtration
• Side stream filtration of 8 – 12 % of mainstream flow
• Automatic Self cleaning filter
• Pressure Sand Filter
Advantages - PSF
• Worldwide proven technology
• Depth Filtration
• Excellent for fine silt
• Online
• Very low waste water
• Long life
• Negligible maintenance
Ozone Generation
Oxygen Preparation
Ozone Generation
Ozone Injection
Ozone Diffusion
Ozone Contactor
Oxygen Preparation
• Oxygen From Ambient Air
• Oxygen concentrator
• More than 90% concentration
• Dry Industrial Grade Oxygen
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
Ozone Injection & Diffusion
• Venturi Ejector
• Sparger
• Chemone Diffuser cum Contactor
• Valves, pumps etc
• Water Trap
• Ozone Vent
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
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
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.
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 %
Installation Scheme
Process Flow
Diagram
Suitable For
100 TR – 500
TR
Installation Scheme
Process Flow
Diagram
Suitable For
300 TR – 5,000 TR
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
Ozone Doze
• 2.0 – 3.5 ppm in side stream water flow
• 0.2 – 0.4 ppm in main stream water flow
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

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Rethink Cooling Tower Water Treatment

  • 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 62
  • 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
  • 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 %
  • 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