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Help CenterOffshore Skid Design Experience Applied to Seawater Electrolysis Chlorination System for Oil & Gas Platforms
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As a leading manufacturer based in Tianjin, China, Tianjin ZhuoLiNeng (ZLN) Technology Co., Ltd. brings extensive offshore skid design experience to our Seawater Electrolysis Chlorination System specifically engineered for oil and gas platforms. Our systems are built to withstand harsh marine environments, providing reliable biofouling control through on-site generation of sodium hypochlorite from seawater. With a strong track record of exporting to over 15 countries across North America, Europe, Southeast Asia, and the Middle East, we deliver proven technology that enhances operational safety and reduces chemical logistics costs.
Our electrolysis chlorination units utilize advanced titanium electrodes coated with mixed metal oxides (MMO) to ensure high efficiency and long service life. The skid-mounted design integrates all components—including power supply, control panel, electrolytic cells, and auxiliary equipment—into a compact footprint ideal for space-constrained offshore platforms. Each system is tailored to meet specific platform requirements, with options for manual or fully automatic operation.
Key Features & Technical Specifications
Modular Skid Design – Pre-assembled and tested, ready for quick installation and commissioning, reducing offshore hook-up time.
High Chlorine Production Efficiency – Achieves up to 3.5 kWh/kg Cl₂ equivalent, with minimal electrode corrosion.
Automatic Self-Cleaning – Integrated reverse polarity cleaning cycle prevents scale buildup on electrodes, ensuring consistent performance.
Robust Control System – PLC-based with touchscreen interface, remote monitoring capability, and alarm functions for safe operation.
Seawater Compatibility – Designed for salinity range 20–40 g/L, temperature 0–40°C, and suspended solids up to 50 mg/L.
Corrosion-Resistant Materials – wetted parts in titanium, duplex stainless steel, and PVC-U to withstand aggressive seawater and hypochlorite.
Compact Footprint – Typical skid dimensions: 2.5m (L) × 1.2m (W) × 1.8m (H) for 10 kg/h unit, customizable to platform layout.
Compliance with International Standards – Designed according to API, NACE, and IMO guidelines (certificates available on request).
| Parameter | Value (Typical) | Remarks |
|---|---|---|
| Chlorine Production Capacity | 0.5 – 50 kg/h (as Cl₂ equivalent) | Customizable per client requirement |
| Generated Hypochlorite Concentration | 0.5 – 1.5 g/L (as available chlorine) | Dependent on current density and seawater conditions |
| Operating Pressure | 0.2 – 0.6 MPa | Inlet pressure; system includes pressure relief valve |
| Power Consumption | 4.5 kWh/kg Cl₂ | Including rectifier and auxiliaries |
| Electrode Material | Titanium substrate with MMO coating | Guaranteed life > 5 years under normal operation |
| Skid Weight | 1.5 – 8 tons (depending on capacity) | Optimized for crane lifting and offshore installation |
| Protection Class | IP56 (electrical enclosure) | Optional explosion-proof (Ex) configuration available |
Customer Benefits
Reduced Chemical Handling Risks – Eliminates the need for storage and transportation of hazardous chlorine gas or bulk sodium hypochlorite.
Lower Operational Costs – On-site generation using seawater drastically reduces chemical procurement and logistics expenses.
Minimal Maintenance – Self-cleaning electrodes and robust design require only periodic inspection; typical maintenance interval is 6 months.
Scalable Capacity – Modular design allows easy expansion by adding more cell stacks to meet increased platform demand.
Remote Monitoring – Optional SCADA integration enables real-time performance tracking and alarms from onshore control rooms.
Environmentally Friendly – Produces a dilute, safe disinfectant that decomposes naturally, leaving no harmful residues.
At ZLN, we have supplied over 200 electrochlorination systems to offshore installations worldwide, including major oil & gas operators in the Middle East, Southeast Asia, and the Gulf of Mexico. Our products are manufactured in our Tianjin facility with stringent quality control, and we offer comprehensive after-sales support including on-site commissioning, training, and spare parts supply. With easy access to Tianjin Port, we ensure timely delivery and efficient logistics to any global destination.
Contact us today to discuss your specific seawater chlorination requirements. Our engineering team will customize a skid-mounted solution that perfectly fits your platform layout and operational needs. Let ZLN's offshore skid design experience work for you.
Frequently Asked Questions (FAQ)
Q: What is the typical lifespan of the electrodes?
A: Under normal operating conditions (seawater salinity 25–35 g/L, temperature 25°C, and proper current density), our MMO-coated titanium electrodes typically last 5–8 years. Periodic cleaning and reverse polarity cycles help extend their life.Q: Can the system handle high variations in seawater quality?
A: Yes, our system is designed to tolerate a wide range of salinity (20–40 g/L) and turbidity up to 50 mg/L. For extremely high silt or organic content, we recommend a pre-filtration unit, which can be integrated into the skid.Q: Is the skid supplied complete with all necessary instrumentation?
A: Absolutely. Each skid includes flow meters, pressure gauges, temperature sensors, conductivity meters, and a PLC-based control panel. The system is fully functional upon connection to seawater supply and electrical power.Q: What certifications are available for the system?
A: We can provide certification according to various classification societies (DNV, ABS, Lloyd's, CCS) upon request. Our manufacturing process follows ISO 9001 quality management standards, and we can also comply with NACE MR0175 for sour service if required.Q: How long does installation and commissioning take?
A: Installation typically takes 1–2 days for mechanical and electrical hookup. Our on-site engineers then perform commissioning within 1 week, including system calibration, performance testing, and operator training.Q: What is the minimum platform deck space required?
A: For a 10 kg/h unit, the skid footprint is approximately 3.0 m × 1.5 m. We can customize the layout to fit irregular spaces, including vertical stacking options for limited areas.Q: Can the system be integrated with existing platform control systems?
A: Yes, our PLC supports common communication protocols such as Modbus RTU/TCP, Profibus, and OPC-UA. We can integrate with DCS or SCADA systems for centralized monitoring and control.Q: Do you offer spare parts packages?
A: We recommend a 2-year spare parts kit including electrode sets, gaskets, seals, and circuit boards. Consumables like hypochlorite storage tank linings are also available upon request.
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