Working principle of sodium hypochlorite generator equipment

Sodium hypochlorite generator equipment operates on the principle of electrolyzing a dilute solution of sodium chloride in an electrolytic cell, where a series of electrochemical reactions occur under the action of positive and negative electrodes, resulting in the generation of sodium hypochlorite solution. Sodium hypochlorite is a strong oxidant that generates hypochlorite ions in aqueous solution through electrolytic reactions, possessing oxidation and disinfection properties similar to other chlorine derivatives.

Working Principle:

Dilute sodium chloride solution undergoes a series of electrochemical reactions in the electrolytic cell under the action of positive and negative electrodes, resulting in the generation of sodium hypochlorite solution. Sodium hypochlorite is a strong oxidant that generates hypochlorite ions in aqueous solution through electrolytic reactions, possessing oxidation and disinfection properties similar to other chlorine derivatives.

Electrode Reactions:

Anode: 2Cl- – 2e- → Cl2↑

Cathode: 2H+ + 2e- → H2↑

Overall Reaction: NaCl + H2O Electrolysis→  NaClO + H2↑

Process Flow of Electrolytic Sodium Hypochlorite Generator Equipment:

1. The current input from the electrolysis power supply causes the dilute saltwater solution between the anode and cathode of the electrolytic cell to undergo ionization, producing sodium hypochlorite solution. A metering pump is used to input the dilute saltwater into the electrolytic cell. The electrolytic cell is maintained at a relatively low temperature, ensuring high electrolysis efficiency.
2. Electrolysis Power Supply: Utilizes a constant current stabilized power supply with an electrical conversion efficiency >92%, low heat generation, and stable operation. The power supply itself incorporatesprotections such as overvoltage/undervoltage input, overvoltage/overcurrent/short-circuit output, and overheating protection to ensure high reliability and safety.
3. Control System: Utilizes a PLC control system, directly monitoring the safe and reliable operation of the entire generator system and performing self-checking, alarm, and shutdown in case of faults. A color touch screen displays real-time operation status of subsystems such as salt dissolution, dilution ratio, electrolysis, dosing, and acid washing units, allowing for parameter adjustments and settings.
4. The system collects detection signals from each unit and controls each unit’s start/stop via electric valves based on certain logic. All parameters of the system can be transmitted over long distances via communication modules. The entire sodium hypochlorite generator system operates automatically, overcoming abnormal equipment conditions due to human factors.
5. Provides spare parts for the generator and other accessories. Depending on your budget and actual needs, you can choose whether to include a mobile remote monitoring system or corresponding configurations.

Features:

1. The electrolytic cell is designed with a novel structural connection that disperses stray currents generated during electrolysis, resulting in high electrolysis efficiency. The electrodes can still function normally even when exposed to air.
2. Salt-saving design reduces energy consumption. Even when the sodium chloride solution reaches 1%, the electrolytic chlorine efficiency can still exceed 85%, reducing operating costs.
3. Utilizes specialized oxidation coating formulations tailored for sodium hypochlorite generator equipment, resulting in more thorough electrolytic reactions, enhanced corrosion resistance, and prolonged lifespan.
4. Selected materials allow for use in low-salt seawater areas, and the electrodes can function normally in low-temperature environments, even in harsh environmental conditions in multiple regions.
5. Mature technology and reliable after-sales service. In case of installation or operational issues, adjustments can be made promptly, and technical services such as electrolytic cell repairs and electrode recoating are available, saving time and costs for customers.

Applications:

1. Production and preparation of sodium hypochlorite solution
2. Industrial wastewater treatment
3. Drinking water treatment
4. Municipal sewage treatment
5. Aquaculture and livestock water treatment
6. Other disinfection applications