Titanium anodes for electrolysis secondary chlorine generators
Sodium hypochlorite generators are devices that produce sodium hypochlorite solution by electrolyzing brine. They are composed of parts such as water softening devices, salt dissolving devices, filtering devices, proportioning devices, electrolytic electrode assemblies, rectifier power supplies, automatic control systems, storage and dosing devices, and acid pickling devices. The pure sodium hypochlorite solution produced is a strong oxidizing agent, with strong sterilization and bleaching effects, and it is currently one of the most widely used disinfectants.
The medium-sized split-type fully automatic sodium hypochlorite generator adopts a cabinet-mounted installation method. All electrical components are centrally installed inside a vertical cabinet, and this cabinet is the core part for the control of the entire system.
Titanium anodes for sodium hypochlorite generators
Process Flow
The system generates a low-concentration sodium hypochlorite solution (0.8%) by electrolyzing 2.5 – 3.0% dilute brine. Since the non-diaphragm method is used, all the electrolytic electrodes are immersed in the electrolyte. The chloride ions released on the anode surface are completely absorbed by hydroxide ions. The difference between the concentration and saturation of the formed sodium hypochlorite solution is nearly 20 times (the saturation of sodium hypochlorite can reach 15%), and there will be no chlorine gas released. Therefore, it is used for on-site preparation and has extremely high safety.
The saturated brine is diluted into 2.8% dilute brine by softened water and then stored in the dilute brine tank. A diaphragm metering pump is used to inject a certain amount of dilute brine into the electrolytic cell. The system conducts online monitoring of the temperature, electrical conductivity, and pressure of the dilute brine before it enters the electrolytic cell, and also performs real-time monitoring of the electrical contacts of the electrolytic cell and the temperature of the liquid discharged from the electrolytic cell (electrolyte – sodium hypochlorite solution). If the temperature deviates from the set value, the equipment will immediately stop running and give an alarm to ensure that the electrolytic cell is not damaged due to dry burning caused by any reasons.
The storage tank is equipped with a hydrogen exhaust fan and a hydrogen alarm device for dual protection of safety to ensure the safety of the equipment and between different equipment. The hydrogen exhaust fan can create a certain wind pressure inside the storage tank. The hydrogen generated during the electrolysis process in the electrolytic cell is forcibly discharged and diluted by a large amount of air and will not stay inside the storage tank, thus ensuring safety.
