English 
The purpose of hypochlorite chlorination system is designed for marine and offshore application.
Seawater based electro chlorinator is generally applied for protecting seawater processing pipeline and from bio growth, and being widely applied for the reason of its economic operating cost, as the raw material directly drained from the seawater and only electricity as well.
The OceanChlor series electrochlorination system applied with developed Concentric Tubular Electrolyzer (CTE), which does not required acid washing by high velocity. It can reduce the package system footprint, traditional Parallel Plates Electrolyzer (PPE) requires Acid washing by HCl, and as for marine application, it should be very hard to have access of acid, also by applying PPE electrolyzer, the package shall have side system such as neutralization system to prevent hazardous condition might be caused by HCl, and HCl for acid washing and sodium thiosulfate for neutralization system shall be handled caution as well, or it has potential risk of causing irreparable loss for operator and client.
Component of Seawater Electrochlorination
- Seawater Booster Pump
- Auto Backwash Strainer
- OceanChlor-EX Electrolyzer Assembly
- Transformer & Rectifier
- Local Control Panel
- Storage Tank
- Air Blowers
- Injection Pump
Parts Options
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Measure Unit |
DIN Unit |
Pipe Material |
UPVC |
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US Unit |
CPVC |
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Electrolyzer |
CTEElectrolyzer |
Skid |
Multi Skids |
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Single Skid |
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Control |
Local Control |
Strainer |
Auto Backwash Strainer |
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Remote Control |
Basket Strainer |
DNVGL-OS-A101: Safety principles and arrangements
DNVGL-OS-B101: Metallic Materials
DNVGL-OS-C102: Structural design of offshore ships
DNVGL-OS-C301: Stability and Watertight Integrity
DNVGL-OS-C401: Fabrication and Testing of Offshore Steel Structures
DNVGL-OS-D101: Marine and Machinery systems and equipment
DNVGL-OS-D201: Electrical installations
DNVGL-OS-D202: Automation, safety and telecommunication systems
Typical Seawater Electrochlorination Process Description
Bio fouling control is one of the main challenges in the upstream processes of the power station is to protect pipeline and process equipment against biological fouling.Restriction of cooling water flows, acceleration of corrosion and a reduction in the overall life of process equipment can all be controlled by the effective design of our electro chlorination package.
Seawater Electro chlorination system packages play an effective role in optimizing flow assurance.
Raw seawater is fed into the package inlet at the designed flow rate via a side stream from the main seawater process line.
Once controlled, the seawater is passed through the electrolyzer which are fed an electrical supply from the package rectifier.
Depending on pressure available this seawater flow will be pressure controlled or boosted to provide the optimum operating pressure and flow rate (required for the chosen electrolyszer configuration).
The rectifier is designed specifically for the requirements of the installed electrolyzers. It converts the AC platform input voltage into the required low voltage DC current and regulates this output to a selected and controlled level.
Electrolysis process takes place within the electrolyzer as per the following equation:
- At the anode: 2 Cl - 2 e → Cl2
- At the cathode: 2 Na+ 2 H2O + 2 e→ 2 NaOH + H2
- Overall: 2 NaCl + 2 H2O → 2 NaOCl + 2 H2
The solution with hydrogen gas are fed into degassing tank and the hydrogen to vent to open atmosphere.
The hydrogen free solution containing sodium hypochlorite is then dosed into the seawater circuit through dosing pumps or gravity.
Typical Process Flow of Seawater Electro Chlorination System
Technical Benefit
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Free Acid washing |
On Site Production |
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By applying self-cleaning technology for electrodes to achieve free acid washing cleaning methods for electrolyzers assembly.
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Producing sodium hypochlorite on site reduces the requirement for use of liquid chlorine solutions. The impracticality of shipping, storing and dosing large volumes of bulk hypochlorite on offshore sites means electro chlorination is the industry preferred method of bio-fouling control. |
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Safety |
Electrolyzer OEM |
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Element chlorine is a dangerous chemical, it is harmful to human body like respiratory tract and retina or even death. On site generation with MCT electro chlorination system could prevent operator directly touches the chlorine or other strong acid and alkali for protection. |
Working with the China major anode and specialty coating manufacturer, we have access to the leading industry electrolyzers with over 30 years’ service.
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Full Output Availability |
Process Automation |
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By only supplying self-cleaning electrolyzer designs the packages do not require any scheduled downtime for cleaning. This provides the opportunity for clients to remove any duty/standby requirements for the electrolyzers and thus reducing footprint and cost effective. |
Control of the complete technological process with a central PLC control system. Visualization of the entire process and logging of all key parameters of alarms. Any parts of the process of the system could also be adjusted by PLC. |
Seawater Electrochlorination Application
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