Electrolytic chlorine production technology is an effective pollution control technology that solves environmental pollution caused by aquatic organisms. Through the use of this technology, it can effectively prevent aquatic organisms from breeding and growing in pipelines and cooling systems. Electrolytic chlorine production is not only an effective Pollution control technology, and its pollution control cost is also very economical. It is a pollution control technology widely used in power plants, chemical plants, nuclear power plants, receiving stations, offshore drilling platforms, etc. in the world.
Our country is a water-poor country, and water shortages are more prominent in coastal cities and island areas. For coastal cities with relatively tight freshwater resources, it has become a consensus to use seawater instead of freshwater as circulating water for power plants or cooling circulating water for receiving stations. This can not only save a lot of freshwater resources, and can protect the environment and maintain ecological balance. Electrolytic chlorine production technology includes electrolysis of seawater chlorine production and electrolysis of salt water to produce chlorine. The electrolysis seawater chlorine production device produces sodium hypochlorite solution by electrolyzing seawater containing a certain chloride ion concentration. Types and requirements of electrodes The core of seawater electrolysis technology is the electrode. The quality of the electrode determines the electrolysis efficiency and the service life of the electrolysis device. For this reason, countries around the world are competing to develop a variety of electrodes. The characteristics of electrodes are determined by the characteristics of seawater. Common cations in seawater include Na+, Mg2+, Ca2+, K+, and H+; common anions include Cl-, SO2-, HCO3-, and OH-. When these ions pass through the electrode, electrolysis reactions may occur according to the laws of electrolysis. In order to eliminate side reactions, it is required from an electrochemical perspective that the anode should have a lower chlorine evolution potential and a higher oxygen evolution potential, and the cathode should have a lower hydrogen evolution potential and should prevent hydrogen embrittlement. To meet the above requirements, common anodes include titanium electrodes and ruthenium-iridium-titanium anodes. The service life of the anode is generally required to be at least 3 to 5 years. There are two types of electrode plate arrangements, one is parallel plate type and the other is cylindrical type. The parallel plate design has a lower flow rate and requires regular cleaning; the cylindrical design has a higher flow rate and does not require regular cleaning. From the perspective of electrode operation economy, the general requirements are that the seawater temperature should not be lower than 5e, and the σ concentration of seawater should not be lower than 8,000 tons/L. In order to ensure the service life of the electrode, it is required that the seawater contains little sand, does not contain heavy metal ions, and is not contaminated by oil and organic matter.