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Sodium hypochlorite generator is a device to produce sodium hypochlorite solution by using industrial table salt aqueous solution or seawater with diaphragm-free electrolysis process technology.
The NaCl in the solution exists in an ionic state, and under the action of the electric field, Cl2 is produced on the surface of the anode, and H2 and OH- are produced on the surface of the cathode:
2Cl--2e → Cl2↑
2H2O+2e → H2↑+ 2OH-
Since there is no diaphragm between the cathode and anode, Cl2 and OH- undergo a secondary chemical reaction in solution to form ClO-:
Cl2+2OH- → Cl-+ClO-+H2O
The total reaction equation is:
NaCl+H2O→NaClO+H2↑
Our self-developed sodium hypochlorite generator has undergone three updates:
The fourth Generation | The Third Generation | The Second Generation |
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(Note: The first generation was produced in 1975, no photos saved.) | ||
Note: Generator generation division is according to the anode technology generation, in the order of graphite electrodes, tubular metal electrodes, plate unipolar electrodes and plate bipolar electrodes. Although there are various electrodes for sodium hypochlorite generators on the market, including mesh plate, tube and embossed plate, this division method is still applicable, including the products of PEPCON (USA), De Nora (Italy), DAIKI (Japan), CHLOROPAC (UK) and Siemens (former US Filter) (USA).
The fourth generation generator still follows the anode technology of the third generation generator, i.e. ruthenium-based and titanium-based metal anodes. The formulation and process of the anode coatings of the electrode manufacturers are currently kept secret, but both DSA (Dimensionally Stable Anode) and MMO (Mixed Metal Oxide) have already proved their reliability in practical applications. The main advantage of the fourth generation generator is that the cathode and anode share the same substrate, which improves their electrolysis efficiency, safety and sealing performance.
