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Tianjin ZhuoLiNeng (ZLN) Technology Co., Ltd. is a specialized manufacturer with deep expertise in designing and constructing skid-mounted electrolytic seawater chlorination systems for offshore applications. Our Offshore Skid Design Experience – Electrolytic Seawater Chlorination System is engineered to deliver reliable, high-performance chlorine generation directly from seawater, eliminating the need for transporting hazardous chemicals to remote platforms. With over a decade of field-proven experience and certification, we combine robust mechanical design with intelligent process control to ensure uninterrupted anti-fouling and disinfection operations under the harshest marine environments.
This system is built around a proven electrolysis cell that uses seawater as the sole raw material. The electrolysis process produces a hypochlorite solution that effectively prevents biofouling in seawater cooling systems, pipelines, and firewater networks, while also providing disinfection for domestic or process water. The skid design is fully customized to match the available footprint and weight limitations of offshore platforms, ensuring seamless integration with existing infrastructure.
Key Features & Technical Specifications
High-Efficiency Electrolytic Cells: Use dimensionally stable anodes (DSA) with titanium substrate and mixed metal oxide coating, ensuring long service life and low energy consumption.
Modular Skid Construction: Pre-assembled and factory-tested for quick on-site installation; each skid is designed for easy lift and transport via offshore cranes.
Automated Operation: Equipped with PLC-based control system, real-time monitoring of chlorine production, temperature, flow, and voltage; optional HMI touchscreen for intuitive operation.
Corrosion-Resistant Materials: All wetted parts are made of titanium, FRP, or high-grade PP/HDPE to withstand aggressive seawater and hypochlorite.
Safety Interlocks: Includes hydrogen gas detection, emergency shutdown, pressure relief valves, and automatic current cut-off to ensure safe operation.
Low Maintenance: Self-cleaning electrode design reduces scaling; periodic acid cleaning is minimized.
Flexible Capacity: Chlorine production from 0.5 kg/h to 50 kg/h per skid; multiple skids can be combined for larger requirements.
Comprehensive Instrumentation: Flow meters, conductivity sensors, pH sensors (optional), and chlorine residual analyzers provide complete process control.
Typical System Parameters (Example for 10 kg/h Unit)
| Parameter | Specification |
| Chlorine Production | 10 kg/h as Cl₂ equivalent |
| Seawater Flow Rate | ~30 m³/h |
| DC Power Consumption | 4.0 – 4.5 kWh per kg Cl₂ |
| Operating Temperature | 5 – 35 °C |
| Salinity Range | 18 – 42 g/L |
| Skid Dimensions (L×W×H) | ~4.0 m × 1.8 m × 2.2 m (customizable) |
| Weight (dry) | Approx. 3,500 kg |
Advantages for Offshore Operations
Eliminates Chemical Logistics: No need to store or transport hazardous sodium hypochlorite or chlorine gas; generated on-site from seawater.
Reliable Anti-Fouling: Continuous dosing ensures cooling water systems, heat exchangers, and firewater piping remain free from macro- and micro-fouling.
Improved Safety: No pressurized chlorine gas cylinders or dangerous chemical storage; system includes hydrogen dilution and detection.
Reduced Operating Costs: Low power consumption and minimal chemical purchasing costs.
Proven Offshore Skid Design: Our team at ZLN has delivered skids for platforms in the North Sea, South America, Southeast Asia, and the Middle East, with adaptation to harsh weather and limited deck space.
Why Choose ZLN Technology?
As a manufacturer located in Tianjin, China, we have focused exclusively on electrolytic seawater chlorination systems since our founding. Our certified quality management system ensures every skid undergoes rigorous factory acceptance tests (FAT) before shipment. We have successfully exported to North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, the Middle East, Western Europe, Central America, Northern Europe, Southern Europe, South Asia, and the domestic Chinese market. This global footprint demonstrates our capability to meet diverse regulatory and environmental requirements.
We offer turnkey support including skid design, fabrication, installation supervision, commissioning, and after-sales service. Each system comes with a comprehensive documentation package (P&ID, electrical drawings, O&M manual) and training for your operators. Our technical team is readily available for remote or on-site assistance.
Contact us today to discuss your offshore chlorination needs. With ZLN’s proven skid design experience, you gain a reliable partner that ensures your operations remain biofouling-free and fully compliant with safety standards.
Frequently Asked Questions (FAQ)
Q1: How does the electrolytic seawater chlorination system work?
A: Seawater is passed through an electrolytic cell where a DC current converts chloride ions into sodium hypochlorite (NaOCl), which is then injected into the process water. No external chemicals are needed.Q2: What is the typical chlorine production capacity range?
A: Our standard skids cover from 0.5 kg/h to 50 kg/h as chlorine equivalent. Larger capacities can be achieved by paralleling multiple skids.Q3: Can the system handle variable seawater salinity and temperature?
A: Yes, the control system automatically adjusts current to maintain target chlorine output across a salinity range of 18–42 g/L and temperature 5–35°C.Q4: What maintenance is required?
A: Routine inspection of electrodes, cleaning of cell if scaling occurs (frequency depends on feed water quality), and periodic calibration of sensors. Our design minimizes cleaning intervals.Q5: How long does it take to install and commission?
A: Being pre-assembled on a skid, installation typically takes 1–2 days on-site plus 2–3 days for commissioning and training, depending on integration complexity.Q6: Do you provide certification like CE or ATEX?
A: We offer certification. Hazardous area classification (ATEX/IECEx) and other certifications are available upon request depending on project requirements.Q7: Can the skid be designed for limited space on an offshore platform?
A: Absolutely. Our engineers can optimize the layout to fit tight footprints, including vertical or stacked configurations.Q8: What after-sales support do you offer?
A: We provide a 12-month warranty, remote technical support, and optional annual service contracts. Spare parts are stocked for quick delivery.
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