a brand of sumiyoshi engineering pte ltd...guard water technolgy(gwt) for circulating water...
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Guard Water Technolgy(GWT) For Circulating Water Treatment
Non Chemical & Less/Zero Water Blowdown System
A Brand of Sumiyoshi Engineering Pte Ltd
Energy Division
Common Issues of Circulating Water
Chemical Treatment
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
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
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
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
Application
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
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
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: [email protected]
Website: www.sumiyoshi.com.sg