Sodium hypochlorite generator

Operating principle

Low-voltage DC electrolysis dilute brine process is adopted for sodium hypochlorite generator. The salt is dissolved in water and configured into low-concentration brine, which is sent to the closed electrolytic cell. The titanium base coating electrode is electrified to generate electrolytic chemical reaction, and sodium hypochlorite disinfection solution is generated on site. The by-product hydrogen is safely discharged out of the room through a special system.

The tap water enters the salt dissolution unit, the common salt is mixed into qualified dilute brine, and the impurities are filtered and removed before being delivered to the electrolytic cell; Under the action of DC power supply, dilute brine electrolyzes between titanium electrodes to generate sodium hypochlorite; The generated disinfection liquid flows into the light-proof anti-corrosion storage tank for storage; The system is linked with the dosing pump to accurately add the disinfection solution to the water body to be treated. The strong oxidation of hypochlorous acid destroys the structure of microbial protein to achieve sterilization and inactivation. The built-in temperature, liquid level and hydrogen concentration of the equipment are subject to multiple monitoring, and automatic alarm protection is provided for over-high temperature, abnormal liquid level and over-standard hydrogen; Support automatic acid cleaning function, regularly remove scaling on electrolytic polar plate, stabilize electrolytic efficiency, guarantee continuous and stable production of qualified disinfection solution for 24 hours, and realize on-site preparation and use upon production.

Equipment configuration

The whole set of skid-mounted equipment is integrated, corrosion resistant, with perfect safety protection, and is suitable for 24 hours of continuous chlorination and disinfection. The core configuration is as follows:

• Soluble salt water distribution unit: PE/PP anti-corrosion soluble salt tank, equipped with automatic water replenishment, mixing, precision filter, automatic configuration of dilute salt water, filtration of salt residue impurities, protection of electrolytic cell core components.
• Core electrolytic cell assembly: titanium base ruthenium iridium coated electrode group, corrosion resistance, high current efficiency; Enclosed electrolytic chamber, with heat dissipation and cooling structure, ensures long-term stable electrolytic operation and is the core chlorination component of the equipment.
• Intelligent rectifier power supply: high-frequency constant-current rectifier converts alternating current into low voltage DC current, real-time display of voltage and current, overload and over-temperature protection to ensure safe and efficient electrolysis.
• Liquid storage and dosing system: light-proof and anti-corrosion sodium hypochlorite storage tank, corrosion resistant metering dosing pump, valve pipeline components, which can quantitatively add the disinfection liquid to the water treatment system.
• Safety hydrogen exhaust protection system: independent hydrogen exhaust pipeline, forced exhaust component, hydrogen concentration detection alarm, over-limit interlocking protection, safe hydrogen exhaust and elimination of potential safety hazards.
• PLC intelligent electric control system: human-computer interaction of touch screen, full-automatic chlorination, automatic acid cleaning and descaling, liquid level interlocking, temperature protection and fault alarm; Support manual/automatic dual mode switch.
• Pipeline valve assembly: PP/PVC corrosion-resistant pipeline, flowmeter, check valve, pressure relief assembly, and anti-drug liquid backflow and leakage.
• Optional supporting systems: residual chlorine online monitoring closed-loop feeding module, 4G Internet of Things remote monitoring, soft water pretreatment unit, container integrated unit, suitable for high standard drinking water and large sewage projects.

Product advantages

H6>Site preparation to avoid hazardous chemical risk

Only salt and water are used for local production of disinfection liquid, no need to purchase, transport and store sodium hypochlorite or liquid chlorine steel cylinder, eliminate the hidden dangers of dangerous chemicals storage leakage, and reduce the safety management pressure and procedure cost.

H6>Stable disinfection effect, safe effluent

Fresh sodium hypochlorite is produced on site, with stable effective chlorine concentration, high sterilization and inactivation efficiency, no redundant by-products, meeting strict disinfection standards for drinking water, medical sewage, etc., and applicable to environmental inspection and acceptance.

H6>Fully automatic operation, reducing operation and maintenance workload

Automatic salt dissolution, automatic electrolysis, automatic acid cleaning and descaling, automatic feeding, multiple safety interlocking protection, unattended operation; Optional online closed loop control of residual chlorine, and automatic adjustment of chlorine production according to residual chlorine in water body.

H6>Economical operation cost and easy availability of raw materials

The raw materials are only salt and electricity, which is convenient for purchase and low in price; The electrode has long service life, excellent salt consumption and power consumption indicators, and the comprehensive cost of long-term operation is lower compared with the outsourced finished disinfection solution.

H6>Complete safety protection, anti-corrosion and durability of the complete machine

The whole set of hydrogen monitoring and forced exhaust system provides multiple protections for overtemperature, overpressure, salt and water shortage; Anti-corrosion materials shall be adopted for all the parts contacting with chemical liquid, which are resistant to sodium hypochlorite corrosion and have long service life of equipment.

H6>Modular customization for easy and flexible installation

Skid-mounted integrated ex-factory, on-site water and electricity can be put into production; From small dozens of grams per hour to large kg production can be customized, support multiple parallel expansion, adapt to different sizes of projects.

Application Scenario

Widely used in drinking water supply, sewage treatment, medical treatment, industrial circulating water and other water body sterilization and disinfection, core application scenarios:

• Disinfection of drinking water supply: township water plants, rural centralized water supply stations, drinking water projects in mountainous areas, and disinfection of secondary water supply pools;
• Municipal sewage treatment: disinfect the effluent from the sewage treatment plant and the township sewage station, kill the microorganism such as fecal coliform, and ensure the effluent meets the standard;
• Disinfection of medical wastewater: end sterilization treatment of medical wastewater in hospitals, clinics and physical examination centers, meeting wastewater discharge standards of medical institutions;
• Industrial circulating water: circulating cooling water for power plant, chemical plant and industrial park is used for sterilization and algae removal, and for inhibiting the growth of microorganism;
• Public water environment: sterilization and disinfection of pool water, landscape water and reclaimed water recycling system;
• Other disinfection scenes: Aquaculture water treatment, food processing water disinfection, etc.

Technical parameters

• Effective chlorine output: 50g/h ‑ 5000g/h (supporting multiple parallel capacity expansion)
• Concentration of disinfection solution produced: 5-8g/L sodium hypochlorite solution
• Electrolytic raw material refined salt+tap water (can be equipped with soft water pretreatment)
• Executive standard GB28233 ‑ 2011, HJ/T258 ‑ 2006
• Control mode PLC touch screen is fully automatic, residual chlorine closed loop and IOT remote monitoring are optional
• Safety function Hydrogen monitoring, overtemperature, water shortage, salt shortage, overcurrent protection, automatic acid cleaning and descaling
• Electrode material Titanium base material Ru-Ir coated electrode
• Operating mode: 24h continuous full-automatic operation
• Working power 380V/220V 50Hz
• Working environment temperature: 5-40 ℃

After-sales guarantee

Provide a complete set of scheme design, equipment production, site installation and commissioning, operation training, acceptance assistance and one-stop service for sodium hypochlorite generator to ensure long-term safe and stable operation of disinfection system:

• -Compliant effective chlorine output and supporting configuration scheme shall be customized free of charge according to project water quantity, disinfection dosage and site working conditions;
• -The complete machine is skid-mounted and prefabricated in the factory, and is subject to power-on pressure test after delivery. Water and electricity pipelines are connected on site for fast commissioning;
• -One year warranty for the complete machine, special warranty for electrolytic electrode, rectifier power supply, metering pump and other core parts, and lifetime technical support;
• -Hour after-sales response, remote troubleshooting of abnormal chlorine generation, alarm and dosing faults, and providing operation guidance;
• -Provide lifelong electrode maintenance and replacement, system upgrading, operation and maintenance training, project acceptance technical support and other value-added services.