Is it okay to use the domestic sodium hypochlorite generator with imported electrodes?
Electrolyzed brine sodium hypochlorite generator because of its raw materials are easily available and there is no worry about hazardous chemicals. Therefore, disinfection in the water industry is getting more and more attention. There are more and more manufacturers of sodium hypochlorite generators. Your own electrodes are produced (or imported) by foreign brand companies. Imported electrodes are not equivalent to containing electrolyzers. Is the sodium hypochlorite generator system made with foreign brand electrodes good? I don't think so. In fact, there are only one or two foreign companies in China that can process according to drawings. Other foreign companies sell electrolytic cells, power supplies, and other components including electrodes, not just electrodes.
One,Electrode production needs to provide drawings
Electrode is an important part of the sodium hypochlorite generator system. The electrode needs to be made by a professional manufacturer. Generally, electrode manufacturers are not suitable for most sodium hypochlorite generator manufacturers because of their professionalism, environmental protection, and large investment. They can only be outsourced. Electrode manufacturers only process according to the drawings provided, and do not process without drawings, and will not sell electrodes according to the drawings of other manufacturers for profit (observe professional ethics). The design of the electrode plates varies from manufacturer to manufacturer of sodium hypochlorite generators, and they all have their own unique characteristics.
Two,Electrode requirements
The base material of the electrode plate meets first-grade pure titanium, the anode is coated with rare metal ruthenium and iridium, and it is sintered many times. The anode coating formula and thickness of each electrode manufacturer are different. For example, the sodium hypochlorite generator manufacturer does not require the electrode manufacturer to formulate it. Since there is no national standard for electrode coating, conscientious domestic and foreign companies will formulate their own standards to meet the electrolysis requirements of dilute brine for at least 5 years. The concentration of dilute brine is different, and the formula of rare metals is also different.
Electrode performance includes four aspects:
1. Chlorine evolution potential: Under certain conditions, the lowest potential for releasing chloride ions;
2. Polarizability: The potential difference between the current density of 200A/㎡ and 2000A/㎡ is also an indicator of coating activity;
3. Chlorine evolution efficiency: the current efficiency involved in the chlorine evolution reaction. Generally, the efficiency is greater than 88% under 25 degrees Celsius when measured by our polar plate;
4. Enhanced life: 1mol sulfuric acid, 20000A/m2 current density, the electrode failure time.
Three,Electrolyzer production
As a professional manufacturer of sodium hypochlorite generators, the production of electrolyzers is the most critical. Poor production will greatly affect the efficiency of electrolysis. Dilute brine cannot fully participate in electrolysis, and hydrogen cannot be released in time to eliminate potential safety hazards. Of course, there are still many factors that need to be resolved, so I won't talk about it here.
Four,Summary
At present, disinfection in the water industry is facing an important choice due to safety issues. The electrolytic brine sodium hypochlorite generator is of great interest to owners because of its easy availability of raw materials. There are great business opportunities in the market, leading many manufacturers to actively participate in the production of sodium hypochlorite generators. This is a good thing for the industry, but this technology is constantly being introduced, and more reasonable, safer, and more cost-effective users are also very welcome.
It is undeniable that some companies are eager for quick success and instant profit, blindly imitating, in order to let users rest assured that they use imported electrodes, and even more, they call their electrode coatings DSA, but they do not know that DSA is the anode coating technology of a foreign company and is also their trademark. Not to mention the infringement of intellectual property rights. In fact, the entire process system was not understood, and the product was blindly introduced to the market at a very low price. The user experience was very bad, frequent failures, heavy maintenance, and labor intensity did not decrease. , The utilization rate is low, and the operating cost is not as good as described. Many users have concluded that the domestic sodium hypochlorite generator is not easy to use or unusable (like the original chlorine dioxide generator, which breaks the industry).
Even if foreign brand electrodes are used, the electrolytic cell is not well made, the process system is not well understood, and various safety measures are not understood, good results are still not obtained, and safety accidents may even occur. Therefore, it is recommended that if you are engaged in electrolytic brine sodium hypochlorite generators, you must be a conscientious enterprise, have a responsible attitude to users, should feel guilty for causing trouble to users, and insist on doing technical research and development to solve practical problems. I believe that healthy competition should promote this technology to be better and benefit the water industry, instead of letting users sneer at domestically-made equipment.
Jinan Orui Industrial Co., Ltd.
