Brine electrolyzer water electrolysis machine for making sodium hypochlorite solution

Sodium Hypochlorite Generator(Electrochlorination system)

0.8% Sodium hypochlorite generation system is producing sodium hypochlorite onsite through 3% brine electrolysis(salt and water after saturated), and the whole system is a combination of Softening unit, Filtration unit, Salt dissolving unit, Online proportioning unit, electrolytic unit, rectifier power supply, automatic control systems, storage and dosing unit, etc.
Sodium Hypochlorite is widely used in many water industries. The most applied in drinking water disinfection, on site generation of Sodium hypochlorite is more safely than feeding chlorine gas. Transporting Chlorine gas tank is risky to leakage and lead to explosion.

Process:

1). Salt will be dissolved in the tank and become saturated brine (25%);
2). Diluted into 3% after filtered ( If use sea water as raw material, it will be treated before electrolysis);
3). Electrolysis in the host machine;
4). The final product- Sodium hypochlorite liquid (5000-7000ppm) in the storage tank;
5). The sodium hypochlorite solution will be injected into the pipe by metering pump;
6). Residual chlorine detective will monitoring the residual chlorine and return feedback to PLC center;
7). PLC center will adjust the speed of dosing pump acc ording to the preset standard.

Generation principle:

The sodium chloride contained in seawater or brine flow between sets of electrodes (anodes and cathodes) in an electrolyzer.
The chemical reactions which take place in the electrolyzer between chlorine and Sodium hydroxide produced by electrolysis.
In the electrolyzer the sodium chloride is completely dissociated into the ions Na+ and Cl-, causes the following electrochemical and chemical reactions:
Electrode reaction:
at the anode: 2Cl- - 2e → Cl2;
at the cathode: 2H+ + 2e → H2;
Solution reaction:
2NaOH + Cl2 → NaCl + NaClO + H2O
Overall reaction as follow:
NaCl + H2O + DC →NaClO + H2↑

Main Features

1) The only raw material: salt or sea water which is safety and convenient for transportation and storage, without any volatility and toxicity.
2) Bipolar electrode connection mode, reduced the heat yield, as well greatly reduced the production of sodium hypochlorite salt consumption and power consumption
3) Salt consumption< 3.5kg / kg Cl2 (National standard 4.5); power consumption < 4kw /kg Cl2 (National standard 4.5)
4) Siemens PLC and touch screen, full automatic control
5) Cathode life >20 years; Machine life >15 years

Machine Parts

Marine-grade high-frequency voltage constant current supply , power conversion efficiency >92%,low heat, stable

Machine Parts

Full transparent design of electrolytic cell, easy to observe the brine electrolysis and scale of electrode, for better pickling and protection. The electrolytic cell also equipped with liquid level detection and temperature protection, over current and voltage protection. It will be alarmed and stopped running when any fault of the system.