Titanium Electrodes For Scale Removal in Circulating Water

Electrochemical sterilization principle of ruthenium iridium titanium electrode

Electrochemistry is not a simple process, it involves multiple mechanisms and reaction processes, such as physics, chemistry, and biology. Multiple factors can be considered to work together. Under the action of an electric field, chloride ions in water will be oxidized into chlorine, hypochlorous acid, hypochlorite salts, and other free chlorine components. Electrolytic chlorination is mainly carried out through hypochlorous acid. Hypochloric acid is a very small neutral molecule that can oxidize and destroy bacteria, causing them to die. In electrocatalytic reactions, electrolyzed water and dissolved oxygen in water will produce short-lived intermediate products on the electrode surface. These highly oxidizing substances can oxidize various components in microbial cells, leading to irreversible changes in microorganisms.

Advantages of using ruthenium iridium titanium electrodes for electrochemical water treatment equipment

The electrolysis system is controlled by a microcomputer, fully automatic operation, easy and simple maintenance, small footprint, light weight, and easy and flexible installation. No need to add chemical water treatment agents, green and environmentally friendly, no pollutant emissions, water-saving and energy-saving, improving production efficiency. Economically practical. The processing capacity of a single device is 50m3/h, the electrode life is 3 years, and the sterilization and bathing effects are more than 10 times that of drugs. The equipment investment payback period is short.

The key technology of circulating water electrochemical descaling is to use the electrochemical characteristics of anions and cations in water to solve the scaling, corrosion and microbial control problems of circulating cooling water systems by electrolysis. Specifically, direct current is mainly passed between the anode and cathode plates, and a strong alkaline environment is formed in the cathode area, so that Ca2+, Mg2+, etc. form hydroxide precipitation to achieve the purpose of descaling; while the anode area forms an acidic environment, producing strong oxidizing bactericidal substances to kill microorganisms and algae. The main factors involved in circulating water electrochemical descaling include water quality, water flow rate of the circulating water system, temperature, and other factors such as excessive scale in the system, unstable water quality, and poor ventilation of the pipeline. Impurities, hardness and alkalinity in the water quality will affect the formation of scale; too low water flow rate will make pollutants easily deposited on the pipe wall; and the higher the water temperature, the greater the possibility of scale. As for advanced descaling capabilities, circulating water electrochemical descaling technology can not only effectively solve the scaling problem of the circulating water system, but also prevent corrosion and control microbial growth. In addition, it can also increase the concentration multiple of the circulating cooling water system, reduce the consumption of new water and the amount of sewage discharged, and achieve the purpose of water saving and emission reduction.

Please note that the specific implementation and application effect of circulating water electrochemical descaling technology may vary depending on factors such as equipment model, operating conditions, and water quality. In actual applications, it is necessary to select appropriate equipment and technical parameters according to specific circumstances, and perform reasonable operation and maintenance to ensure its descaling effect and service life.

 

What electrode is used for electrochemical descaling?

Circulating hydrochemical equipment includes two parts: electrode coating materials and equipment structural design. In fact, electrode materials determine structural design and are the core of electrochemistry. Electrodes generally refer to titanium oxide electrodes, which are coated with oxide on a titanium substrate. The titanium substrate is non-conductive, while the coating is conductive. Under the action of electrolysis, when the coating dissolves or is damaged, titanium is no longer inert and will undergo electrochemical corrosion and dissolution. Titanium element has active properties. Titanium electrodes need to have excellent conductivity, otherwise they will have high power consumption, low current efficiency, high subsequent operating costs, and high electrode replacement costs.

According to the principle of electrolysis, the anode adsorbs anions, which will undergo physical, chemical, and electrochemical reactions on the electrode surface. Impurities in water quality will naturally affect the performance of the electrode coating, and even damage the electrode, such as chloride ions, conductivity, hardness, organic matter, etc., which will cause damage to the electrode coating and seriously affect the temperature operation of the equipment. When the electrode is damaged, the equipment current gradually decreases, and even the electrode undergoes passivation, resulting in a decrease in descaling efficiency and inability to solve the problem of fouling in the heat exchanger. The new type of titanium electrode should meet the basic technical requirements: impurities in water do not damage the electrode, the electrode does not corrode, high current density, low resistance, low energy consumption, and long electrode life.

 

♦ Scale thickness 0.3mm → refrigerant approach temperature rises by about 3.3℃, ​​increasing energy consumption by 10%.

♦ Scale thickness 0.6mm → refrigerant approach temperature rises by about 6.7℃, increasing energy consumption by 20%.

♦ Scale thickness 0.9mm → refrigerant approach temperature rises by about 10.3℃, increasing energy consumption by 31%.

 

Titanium electrodes for scale removal in circulating water Working Principle:

1 Before use, water in cooling tower exists mainly as macro-molecule, which contains free oxygen, bacteria, organisms. Those are main reason to cause pipe rust, corrosion.

2 In use, we makes use of electrolysis technology to create high frequency power, which break up water molecules.

3 In this process, water molecules breaks as of electrolysis, creates active oxygen which can oxidize organisms, bacterial into CO2,
and exhaust. Meanwhile, part free oxygen combines with free oxygen into oxygen, exhaust.

Finally negative pole gathers with lots active hydrogen, which helps cooling tower water stays in a strong reducing environment.

1.Save Energy, Protect Environment
Electrical descaler can works under high efficiency, low power consumption. As of its constant working, which ensure constant electrolysis environment. It reduces over 4% power consumption. Easy to clean, no need drain,friendly to environment.

2.Low Cost Maintenance

3. Long lifetime
Electrical descaler can separated chemical corrosion, long its lifetime.
4. Easy Operation
Clean dirty collector 2-3times. After using 2months, water can achieve best condition. Even if stop using for one moth, recycling water systemwon't appear stop working or alarm.

Titanium electrode scaling maintenance method !

Due to the high concentration of calcium and magnesium ions in the electrolytic solution, the titanium electrode cathode is prone to scaling after a period of electrolysis. The treatment method is as follows:

1. In order to reduce sedimentation and scaling, the raw water is softened to remove suspended solids, certain colloidal substances, and organic impurities, which can prevent or reduce sedimentation and scaling. Pre treatment can also be performed to remove the hardness of the raw water, effectively preventing scaling.

2. Acid washing method: There is always a small amount of precipitated scale generated during the operation of the electrodialysis machine, especially in areas with poor water quality. After accumulating to a certain extent, acid washing treatment needs to be carried out. According to the situation, regular acid washing treatment is a simple and effective method to eliminate sedimentation without dismantling the equipment. The cycle depends on the actual situation, and generally 1% to 2% hydrochloric acid is used for cyclic cleaning.

3. Use reverse electrode: Regularly reverse the electrode to change the direction of ion migration. According to the actual situation, the electrode is usually reversed every 2-8 hours. In recent years, automatic reverse electrodes have been frequently used both domestically and internationally for about 15-30 minutes. In this way, even slight precipitation can be effectively removed. However, frequent reverse requires high quality of ruthenium iridium electrodes and high loss of titanium electrodes. It is necessary to choose high-quality and corrosion-resistant electrode materials.

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Company: Baoji Dynamic Trading Co., Ltd

Country:China

Add:Baoti road,Jintai,Baoji city,Shaanxi,China

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