Coastal chemical industrial parks bear pivotal responsibilities for regional industrial economic development, yet they also face stringent environmental governance challenges centered on seawater resource utilization and wastewater discharge restrictions. Traditional seawater treatment and industrial wastewater disposal models for chemical parks suffer from low resource utilization efficiency, high energy consumption, massive concentrated brine discharge, and potential damage to marine ecological environments. To address these industry pain points, our company has developed a complete circulating seawater electrolysis zero-discharge treatment system tailored to the operational characteristics of coastal chemical parks. This integrated solution realizes closed-loop circulation of seawater resources, zero liquid discharge, and green energy co-production, delivering dual value of environmental compliance and economic benefits for coastal chemical enterprises.
1. Industry Pain Points of Seawater Treatment in Coastal Chemical Parks
Most coastal chemical enterprises rely on seawater for cooling, process water supplementation, and flue gas treatment. However, conventional treatment processes cannot adapt to the high-salinity, high-corrosivity, and complex-component characteristics of industrial-used seawater, resulting in prominent industry-wide problems.
First, the traditional single desalination and filtration process produces a large amount of high-concentration brine, which cannot be fully recycled. Random discharge will cause local seawater salinization, destroy marine microbial ecosystems, and violate increasingly strict marine environmental protection regulations. Second, the repeated circulation and utilization of seawater in chemical production processes leads to the accumulation of organic pollutants, heavy metal ions, and scaling substances, easily causing equipment corrosion, pipeline blockage, and reduced production efficiency, increasing enterprise operation and maintenance costs. Third, the separation of seawater purification, electrolysis treatment, and resource recovery processes results in low overall resource utilization rate, failing to form a circular industrial chain and causing serious waste of marine resources.
Against the backdrop of global dual-carbon goals and strict marine environmental supervision, coastal chemical parks are in urgent need of a systematic, integrated, and sustainable seawater treatment solution to achieve zero discharge, energy conservation, emission reduction, and resource recycling.
2. Core Principles of Our Circulating Seawater Electrolysis Zero-Discharge Technology
Our full-set solution takes circulating seawater as the core medium, integrates independent innovative seawater pretreatment, low-energy-consumption electrolysis, intelligent circulation control, and full resource recovery technologies, and builds a closed-loop treatment system of “seawater intake – purification treatment – electrolysis reaction – resource reuse – concentrated liquid full recovery” with no wastewater discharge throughout the whole process.
Different from ordinary seawater electrolysis technologies, this solution adopts a corrosion-resistant and anti-pollution electrolysis system customized for chemical park working conditions. Through efficient pretreatment processes including precision filtration, impurity removal, and softening, it eliminates suspended solids, organic pollutants, and scaling ions in industrial circulating seawater, ensuring stable and efficient operation of subsequent electrolysis equipment. The optimized electrode structure and catalytic technology effectively avoid chlorine evolution side reactions in the electrolysis process, improve electrolysis safety and energy utilization efficiency, and realize stable long-term operation in complex seawater environments.
In the closed-loop circulation system, the seawater after electrolysis treatment can be fully reused for chemical production cooling, process water, and park environmental water supplementation. The trace concentrated brine and by-products generated during the process are completely recycled and processed into usable chemical raw materials, truly achieving 100% zero liquid discharge, zero marine pollution, and full resource recycling.
3. Composition of the Full-Set Zero-Discharge Treatment System
Our integrated solution adopts a modular and skid-mounted design, which is convenient for rapid installation, commissioning and flexible expansion in chemical parks. The whole system consists of four core functional modules, realizing full-process automated control and intelligent operation.
Seawater Pretreatment Module: This module targets the complex water quality of circulating seawater in chemical parks, equipped with multi-stage precision filtration, sedimentation impurity removal and water quality regulation units. It effectively removes suspended particles, organic pollutants, heavy metal impurities and scaling substances in seawater, improves water quality stability, and provides reliable water intake conditions for subsequent electrolysis treatment, avoiding equipment damage caused by seawater corrosion and impurity deposition.
Low-Energy Seawater Electrolysis Module: Adopting self-developed high-efficiency catalytic electrolyzer and energy-saving control technology, this module completes green electrolysis of purified circulating seawater. It not only realizes deep purification and sterilization of seawater to meet industrial reuse standards, but also produces high-purity green hydrogen and oxygen through electrolysis. The whole process requires no chemical additives, with safe and environmentally friendly reaction process.
Intelligent Circulation & Control Module: Equipped with online water quality monitoring, flow regulation and automatic circulation control systems, it realizes real-time monitoring of seawater salinity, pH value, impurity content and electrolysis operating parameters. The system automatically adjusts operating conditions according to production load changes, maintains the stable closed-loop circulation of the whole system, and reduces manual intervention and energy consumption.
By-Product Full Recovery Module: This module systematically collects and processes concentrated brine and trace by-products generated in the electrolysis and circulation process. After concentration, purification and refining, the brine is converted into high-value chemical raw materials, which can be applied to park chemical production, realizing waste-to-resource conversion and maximizing economic benefits of the system.
4. Core Advantages of the Coastal Chemical Park Customized Solution
Zero Discharge & Ecological Compliance: The whole-process closed-loop circulation mode completely eliminates industrial seawater wastewater discharge, fundamentally solves the problem of marine environmental pollution caused by chemical park wastewater, fully meets international marine environmental protection standards and domestic zero-discharge assessment requirements, and helps enterprises pass environmental supervision audits stably.
High Resource Utilization & Circular Economy: Different from traditional single wastewater treatment equipment, this solution realizes the dual value of seawater purification and resource recycling. Reused seawater replaces fresh water for industrial production, saving precious fresh water resources; green hydrogen produced by electrolysis can be used as clean energy for park production, reducing enterprise energy costs; recovered brine by-products create additional economic benefits, building a complete circular economy industrial chain.
Adaptable & Stable for Complex Working Conditions: Aiming at the high corrosion, high salinity and complex pollutant characteristics of circulating seawater in chemical parks, the system adopts special anti-corrosion and anti-fouling materials and optimized process design, which can operate stably for a long time in harsh industrial environments. The modular design can be flexibly adjusted according to the scale and water quality characteristics of different chemical parks, with strong scene adaptability.
Energy-Saving & Intelligent Operation: The optimized electrolysis energy-saving technology and intelligent automatic control system effectively reduce unit energy consumption. The whole system supports unattended operation, remote monitoring and data visualization management, greatly reducing enterprise operation and maintenance labor costs and improving overall operational efficiency.
5. Application Prospects in Coastal Chemical Industrial Parks
With the continuous advancement of global ecological environmental protection and dual-carbon strategies, green, low-carbon and circular development has become the inevitable trend of the chemical industry. Coastal chemical parks, as key areas of industrial economic development and marine ecological protection, are facing higher requirements for water resource utilization and wastewater discharge governance.
Our circulating seawater electrolysis zero-discharge full-set solution perfectly matches the green upgrading needs of coastal chemical parks. It can be widely applied to seawater circulation treatment, industrial wastewater zero-discharge transformation, clean energy supporting production and resource recycling projects in large coastal chemical industrial parks, fine chemical bases and petrochemical enterprises. While helping enterprises achieve environmental compliance and green production, it effectively reduces comprehensive operating costs, improves resource utilization efficiency, and empowers the high-quality and sustainable development of coastal chemical industries.
