Wastewater Treatment Titanium Electrode of Hypochlorite generation system

??SHAANXI ODEVS ANODE??HONEST-VALUABLE-STABLE-TITANIUM ANODE??

Our China Titanium Anode factory Shows Pictures for your nice reference.

[email protected]

SHAANXI ODEVS ANODE WELCOMED YOU FOR VISITING OUR CHINA FACTORY

Ruthenium-iridium titanium coated anode DSA insoluble anode, a kind of stable anode coated with precious metal oxide (MMO) on titanium substrate, belongs to insoluble anode, which was named DSA (dimensionally stable anode) in the early days, and the name did not seem appropriate in the later practical applications, but has been used until now.

MMO coated titanium anodes have a broad application prospect in cathodic protection, chlor-alkali production, wastewater treatment, electrolysis industry, electroplating and other industries. The use of coated titanium anodes can save energy consumption, reduce pollution, lower costs and effectively treat industrial wastewater, which meets the current requirements of clean production.

Sodium hypochlorite generator is a device that generates sodium hypochlorite solution by electrolysis of dilute salt water (seawater is available), which is composed of electrolytic electrode assembly, rectifier power supply and automatic control system.

Sodium hypochlorite disinfection principle The main way of disinfection of sodium hypochlorite is through its hydrolysis to form hypochlorous acid, hypochlorous acid and then further decomposition to form new ecological oxygen, the strong oxidation of new ecological oxygen to denature the bacteria and viruses on the protein and other substances, so as to kill the source of microorganisms.

Secondly, hypochlorous acid in the process of sterilization, killing viruses, not only can act on the cell wall, virus shell, and because of the small molecules of hypochlorous acid, without charge, can also penetrate into the body of bacteria (virus), and bacteria (disease, virus) body proteins, nucleic acids and enzymes and other organic polymer oxidation reaction, thus killing the pathogenic microorganisms.

Again, hypochlorous acid produced by the chloride ion can also significantly change the osmotic pressure of bacteria and viruses, so that the cell inactivity and death. In the brine solution contains Nat, H- and other ions, according to electrolysis theory, when inserted into the electrode, at a certain voltage, the electrolyte solution due to ion movement and electrode reaction, conductive effect, then CL", OH" and other negative ions to the anode, and Na , H and other positive ions to the cathode, and in the corresponding electrode discharge, so that the redox reaction, the generation of The corresponding substances are produced.

The electrolysis process of brine solution can be expressed by the following reaction equation: NaCl = Na * +CI Anode electrolysis: H20 = H+OH-2CI-2e-→C121 Cathode electrolysis: 2H-+2e-H21 In the electrolysis device without diaphragm, the electrolyte and electrolysis product compound gas in the solution escapes outward, the other are in an electrolytic cell, because the hydrogen gas escapes in the process of In the process of hydrogen escape, the solution is stirred, and a series of chemical reactions occur between the electrolyte products.

The structure of sodium hypochlorite anode group consists of titanium anode plate, titanium cathode plate, bipolar titanium electrode, titanium sink plate, titanium flange, titanium terminal, insulated connecting rod, insulating gasket, insulating nut, etc.

SHAANXI ODEVS ANODE produces titanium anodes for sodium hypochlorite generator in various shapes and specifications, such as titanium anodes with iridium plates, titanium anodes with titanium mesh, titanium anodes with titanium mesh, titanium anodes with titanium mesh, titanium anodes with iridium rods, titanium anodes with titanium wire, etc. The products are applicable from 50g to 10kg sodium hypochlorite generator, and the quality of titanium anodes complies with sodium hypochlorite generator safety and health standard regulations.

Titanium anode classifications:

1, according to the electrochemical reaction in the anode precipitation gas to distinguish, precipitation of chlorine gas is called precipitation of chlorine anode, such as ruthenium coated titanium electrode: precipitation of oxidation is called precipitation of oxygen anode, such as iridium coated titanium electrode and platinum titanium mesh / plate.

Chlorination anode (ruthenium coated titanium electrode): high chloride content in electrolyte, generally in hydrochloric acid environment and electrolysis of seawater, electrolysis of salt water environment.

2、Oxidation anode (iridium coated titanium electrode): the electrolyte is generally in sulfuric acid environment, corresponding product is iridium-tantalum anode.

3、Platinum-coated anode: titanium is the base material. The surface is coated with platinum, the thickness of the coating is generally 0.5-5μm, and the mesh size of platinum titanium is generally 12.5×4.5mm or 6×3.5mm.

Ruthenium-iridium titanium anode has a certain period of working life during electrolytic operation. When the voltage rises very high and no current actually passes through, the ruthenium-iridium titanium anode loses its function, a phenomenon known as anode passivation.

The passivation of ruthenium-iridium titanium anodes can be caused by the following.

1.Coating flaking

Titanium ruthenium iridium titanium anode consists of titanium substrate and ruthenium iridium titanium active coating, the electrochemical reaction is only ruthenium iridium titanium active coating, if the coating and the substrate are not firmly enough combined, from the titanium plate substrate off, off to a certain extent, titanium ruthenium iridium titanium anode will lose its role.

(Divided into crushed off, convex belly-like layer peeling and cracking type off)

2. RuO2 dissolution

Reducing the occurrence of oxygen slows down the generation of oxide film. When the total current density of electrolysis increases, the increase of chlorine generation rate is much larger than the increase of oxygen generation rate, the increase in current density therefore favours a reduction in the oxygen content of the chlorine gas.

The titanium substrate is first pre-oxidised to form an oxide film, which increases the bond between the ruthenium-iridium-titanium active coating and the titanium substrate, making the coating strong and preventing the shedding and dissolution of the ruthenium, but also causing an increase in the ohmic drop of the ruthenium-iridium-titanium anode.

3. Oxide saturation

The reactive coating consists of non-chemometric RuO2- and TiO2, which are oxygen-deficient oxides. The more such oxides there are, the more active centres there are and the better the activity of the ruthenium-iridium-titanium anode.

The electrical conductivity of ruthenium-iridium-titanium coated anodes is a property presented by the distorted n-type mixed crystals of the same crystalline RuO2 and TiO2 produced by heat treatment., in which there are a number of oxygen vacancies and when filled with oxygen, the overpotential rises rapidly and lead to passivation.

4. Cracks exist in the coating

New ecological oxygen is generated on the ruthenium-iridium-titanium anode during electrolysis, and some of it discharges at the interface between the active coating and the electrolyte and then leaves the anode surface to generate oxygen into solution; due to the existence of cracks in the active coating, while another part of oxygen adsorbs on the anode surface and

through the active coating by diffusion or migration to reach the interface between the coating and the titanium plate substrate, and then the oxygen is chemisorbed on the surface of the titanium substrate to generate a non-conductive oxide film (TiO2) with the titanium, generating a reverse resistance.

Or the electrolyte invades through the cracks in the coating, the titanium substrate is slowly oxidized, and the ruthenium-iridium titanium active coating interface is corroded so that the ruthenium-iridium titanium active coating comes off, resulting in an increase in the ruthenium-iridium titanium anode potential. The dissolution of the coating and the oxidation of the titanium substrate are promoted by potential increase.

At present, many new water plants use sodium hypochlorite generator to disinfect tap water, and many old water plants replace other disinfection equipment with sodium hypochlorite generator when upgrading equipment. Owing to the fact that so many water plants are choosing sodium hypochlorite generators. What are the differences with other disinfection equipment?

Although sodium hypochlorite disinfection technology is very mature, the use of sodium hypochlorite generators for tap water disinfection in many countries is still in the promotion stage. Prior to this, many water plants used liquid chlorine or chlorine dioxide generators to prepare disinfection on site. Sodium hypochlorite generators have the following advantages over these two：

liquid chlorine and chlorine dioxide generator of raw materials procurement complex, and liquid chlorine and sodium chlorate and hydrochloric acid are dangerous chemicals, there are risks in transportation and storage, so now many people are using sodium hypochlorite generator on-site preparation of pharmaceutical disinfection.

the raw materials used in sodium hypochlorite generator are salt and electricity, the resulting sodium hypochlorite solution is a very strong oxidant, able to kill all kinds of organisms and bacteria in the water, but also does not have a chemical reaction with other substances in the water, processing safety is much greater than other types of equipment.

Sodium hypochlorite disinfection method has been very widely used in foreign countries, and in China, with the increasingly strict control of chemicals, the operating costs of other disinfection methods will become higher and higher. This is the right time to use sodium hypochlorite generator instead of other disinfection equipment.

Equipment Features

Sodium hypochlorite generator is a combined form, the dissolution of salt, dilute brine deployment, dosing measurement and sodium hypochlorite cycle occurs in a tank, less investment, occupy an area of less, flexible setup. The generator is a tubular, internally cooled, single-pole, series open-phase combination, the generator anode with titanium as the substrate, coated with ruthenium dioxide, low potential, long life. Under normal operating conditions. Each branch occurs continuously for 200-300 hours each time. Hypochlorite Sodium hypochlorite occurs in the form of diaphragm type natural cycle, therefore, the salt utilization rate is high, the electrolysis process current efficiency is high, the sodium hypochlorite yield is large, the energy consumption is small, and the operating cost is low.

GET A QUOTE

Please describe your requirement in as detail as possible, it is useful for us to offer you a better solution.

SHAANXI ODEVS ANODE WELCOMED YOU FOR VISITING OUR FACTORY!