Sodium Hypochlorite Generator

Titanium Anodes Sodium hypochlorite generator

Sodium hypochlorite generator working principle:

Sodium hypochlorite generator is a device that the salt water of low concentration is electrolyzed by electrodes, electrochemical reaction happens and it generates sodium hypochlorite finally. Here gives an example of electrolytic cell and mmo anode.

The detailed technical data of the anode for sodium hypochlorite production:

1. Lifespan: 3 years,5 years and 10 years according to clients’ requests.
2. Solution: 5% sodium chloride solution.
3. Current density: 800-1500 A/m2.
4. Temperature: less than 60 degree.
5. Production amount requested: 1.25kg/hour.
6. Chlorine evolution efficiency of electrolytic tank, over 90% in salt solution, over 85% in seawater (the Sodium chloride concentration should be 3 %-5% in seawater.)
7. Chlorine evolution potential: less than 1.13V.
8. Polarizability of potential difference: less than 40 mV (test the potential difference under the current density of 200 A/M2 and 2000A/M2.)
9. Available chlorine is 8-10g/l in the sodium hypochlorite solution produced.

Details of Accelerated life testing regarding to 5-year request:

1. Solution: 0.5 molar/L,H₂SO₄.
2. Temperature: 40±1 degree
3. Current density:20000A/M2
4. Qualified after 50 hours’ test, which shows mmo anodes for sodium hypochlorite production reaches the 5-year lifespan.

According to the practical requirements, the mmo anodes are changeable. Here lists some other forms of mmo titanium anodes to produce sodium hypochlorite.

The Hooker process is the large scale industrial method of sodium hypochlorite production. In the process, sodium hypochlorite (NaClO) and sodium chloride (NaCl) are formed when chlorine is passed into cold and dilute sodium hydroxide solution. It is prepared industrially by electrolysis with minimal separation between the anode and the cathode. The solution must be kept below 40 °C (by cooling coils) to prevent the undesired formation of sodium chlorate.

Cl2 + 2 NaOH → NaCl + NaClO + H2O

The sodium hypochlorite can be obtained by electrolysis salt solution. Due to the simple facility and obvious disinfection effects; the hypochlorite generator has been extensively valued. The sodium hypochlorite has been widely used to disinfect drinking water, sanitary wares, dish wares, fruits and vegetables. Our anode products measure up to the standard GB12176-2000 Class A and have been extensively marketed.

Applications:

Municipality and community water treatment: drinkable and waste water;

Cooling water treatment: power station, petrochemical & refining plants;

Disinfection: swimming pools and water parks;

Marine sewage treatment;

Antifouling: shipboard, vessel.

Advantages:

Compared to the use of the chlorine and commercial hypo;

Safety: no chemical aggressiveness of raw materials;

Economy: low cost of raw materials;

Convenience: easy to install.