In modern thermal power plants, about 30 cubic meters per second of cooling water is required for every 1000 megawatts of capacity, while nuclear power plants require 45 cubic meters per second of cooling water. If seawater is used as cooling water, the fouling organisms contained in seawater, such as shellfish and algae, will cause a large amount of fouling in the water inlet, pipeline, and condenser, and will form microorganisms on the condenser pipe and heat exchanger surface dirt. These biofoulings can cause mechanical damage or reduce heat exchange efficiency, especially for the power industry, which will bring huge losses. In nuclear power plants, biofouling can even pose a safety hazard.
Chlorine production by electrolysis of seawater is a safe and effective anti-fouling measure, and has been widely used in biological anti-fouling systems in thermal power plants, nuclear power plants, and ships. Natural seawater contains a large amount of salt substances, the main component of which is sodium chloride (NaCl). In general, the chloride ion content in seawater is about 15-19 g/L. Electrolytic seawater anti-fouling is to use special electrodes to electrolyze seawater to produce effective chlorine (including HCIO, ClO1, Cl2) in the non-diaphragm electrolyzer. These available chlorine are strong oxidants, which can kill marine organisms. The purpose of marine organisms settling and growing. The large-scale electrolytic seawater antifouling system in coastal power plants and coastal factories is mainly composed of three parts: seawater electrolyzer group, power distribution equipment, and seawater transportation. Among them, the seawater electrolyzer component is the most critical technology.
The main factor limiting the development of electrolyzer technology is the anode material. It must have a low chlorine evolution potential and a high oxygen evolution potential, and have a long service life and high electrolysis efficiency. The anode material in the seawater electrolysis chlorine production antifouling device has an important impact on its performance, and also directly affects the customer's operating costs.
working principle
When seawater containing chloride ions flows through the electrolyzer, direct current is applied to the electrolyzer, and the following reactions occur in the electrolyzer:
Anode reaction: 2Cl-→Cl2+2e
Cathode reaction: 2H2O+2e→2OH-+H2↑
The chemical reaction between electrodes:
(1) Cl2+2OH-=ClO-+Cl-+H2O
(2) ClO-+H2O=HClO+?OH-
(3) HClO=H++?ClO
Total reaction: NaCl+H2O→NaClO+H2↑
The running directions of equilibrium reactions (1), (2) and (3) mainly depend on the pH value and ambient temperature.
Company information:
Our company has developed and produced a series of titanium anodes with multiple varieties, multiple uses, multiple specifications and multiple coatings, with stable performance, high current efficiency, significant energy-saving effect and long service life. The products are widely used in chemical industry, metallurgy, petroleum, textile, medicine, light industry, environmental protection, sports, mining, marine, cathodic protection, water treatment equipment and other fields.
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Baoji JM-TITANIUM—Professional anode design and manufacturer
Over the years, we have been specialized in anode research and development, production and manufacturing, and our products are exported to many countries around the world. Various series of anodes can be designed and produced according to the actual environmental parameters of different users. You are welcome to visit and negotiate.
Nicole
Company: Baoji Jimiyun Dynamic Co., Ltd
Cuntry:China
Add:Baoti road,Jintai,Baoji city,Shaanxi,China
Cel:+86 13369210920
Gmail:nicole@jmyunti.com
Website:www.jm-titanium.com
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