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Guard d Wat ater Te Techn hnolgy( y(GWT WT) For Ci Circu - - PowerPoint PPT Presentation
Guard d Wat ater Te Techn hnolgy( y(GWT WT) For Ci Circu - - PowerPoint PPT Presentation
A Brand of Sumiyoshi Engineering Pte Ltd Energy Division Guard d Wat ater Te Techn hnolgy( y(GWT WT) For Ci Circu culatin ing W Water r Tre reatmen ent Non Chemical & Less/Zero Water Blowdown System Non Chemical &
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Chemical Treatment
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Electrochemical properties of both water itself and minerals Applying DC voltage to electrodes Anode & Cathode Electrolysis and electrochemical reaction Non Chemical & Less/Zero water blowdown
GWT Technology Principle
Scaling Control Corrosion Control Biological Growth Control Cathode Reaction
pH value up to 13. CaCO3 attaching with biological slime/fouling will precipitate and become sediment to be removed out.
Anode Reaction
pH value low to 3. Strong oxidizing ions like OH, O3 and Hypochlorite, etc. are generated to kill bacteria and algae in cooling water.
Cathode Reaction Anode Reaction
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Mechanism of Water Treatment
Scaling Control Biological Growth Control Corrosion Control
CaCO3(49.5%) and MgCO3(25.1%) was tested out from the sample of scaling deposit.
Fe Ion < 1.0 mg/L
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GWT System & Flow Diagram
GWT system is installed in bypass line, and take 5-10% of cooling tower flow through GWT and treat. Scaling and slime will be removed as waste deposit.
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Comparison with Chemical Treatment
GWT (Non Chemical ) Chemical
Electrolysis, Electrochemical Less/Zero blowdown, No polution Low operation cost
Principle Operation Cost Environmental
High COC, save water Low COC, waste water Chelation, Inhibition, Oxidization High operation cost Secondary polution
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Application
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Site Reference : Shandong Orient Hongye Chemical
Site Info: Water Flow 4000m³/h, Bypass Line 400m³/h, Date: Nov 2015
Water Parameter
Total Hardness （mg/L） Ca Hardness （mg/L） Total Alkalinity （mg/L） Chloride （mg/L） pH Turbidity （NTU） Conductivity （us/cm） Before 650 264 276 474 8.47 4 2570 After 1135 399 345 1049 8.77 3.66 6350
Fe Ion Monitoring in C4
0.2 0.4 0.6 0.8 1 1 4 7 10 13 16 19 22 25 28 31 34 37
Fe Ion Changes
Fe Ion Initial Value
GWT System
July 2017
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Business Model 1. User Purchase 2. EPC Mode A comprehensive contract on 3 – 5 years basis. Annual value of this comprehensive contract is S$ + % saving of makeup water comparing with current chemical treatment. The scope of supply is inclusive of: GWT system Delivery & Installation Maintenance, Service and Spare parts Testing and commissioning Water Sampling testing analysis report
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