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 & Less/Zero Water Blowdown System

Common Issues of Circulating Water

Chemical Treatment

GWT Technology Principle  Electrochemical properties of both water itself and minerals  Scaling Control  Applying DC voltage to electrodes  Corrosion Control  Anode & Cathode Electrolysis and electrochemical reaction  Biological Growth  Non Chemical & Less/Zero water blowdown Control Cathode Reaction 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. Anode Reaction

Mechanism of Water Treatment Scaling Control CaCO3(49.5%) and MgCO3(25.1%) was tested out from the sample of scaling deposit . Corrosion Control Fe Ion < 1.0 mg/L Biological Growth Control

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.

Comparison with Chemical Treatment GWT (Non Chemical ) Chemical Chelation, Inhibition, Electrolysis, Oxidization Principle Electrochemical Operation Low COC, waste water High COC, save water Low operation cost High operation cost Cost Less/Zero blowdown, Secondary polution Environmental No polution

Application

Site Reference : Shandong Orient Hongye Chemical Site Info: Fe Ion Changes Water Flow 4000m³/h, Bypass 1 0.8 Fe Ion Initial Value Line 400m³/h, Date: Nov 2015 0.6 0.4 0.2 0 1 4 7 10 13 16 19 22 25 28 31 34 37 Fe Ion Monitoring in C4 GWT System July 2017 Water Parameter Total Ca Total Chloride Turbidity Conductivity Hardness Hardness Alkalinity pH （ mg/L ） （ NTU ） （ us/cm ） （ mg/L ） （ mg/L ） （ mg/L ） 264 Before 650 276 474 8.47 4 2570 399 After 1135 345 1049 8.77 3.66 6350

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

Head Office – Singapore Address:13A Tuas Road, JTC Terrace Factory, Singapore 638513 Contact Person - Gordon Zheng H/P: +65 9757 7527 Email: zw@sumiyoshi.com.sg Website: www.sumiyoshi.com.sg