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CHLORINSITU - IV - Plus Membrane Electrolysis Plants
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Chloride-free sodium hydroxide and hydrogen are produced in the cathode chamber and ultrapure chlorine gas and scaled down residual brine in the anode chamber separated by the membrane. The resulting chlorine gas is processed further in two ways. As with the plants CHLORINSITU IV, it is suctioned off through an injector included in the scope of delivery and dissolved in the water to be treated as hypochloric acid. If the complete production output is not needed, excess chlorine gas can also be bound with the produced sodium hydroxide as is the case with the plants of the types CHLORINSITU III and stored intermediately as sodium hypochlorite. The plant thus does not have to be adjusted to the maximum demand of chlorine gas but can be adjusted to the average daily demand. Peaks of demand are covered by the additional metering of sodium hypochlorite from the intermediate storage. As with chlorine gas, metering will be carried out through a central injector system.
The chloride-free sodium hydroxide is also stored intermediately and can be transferred into the water to be treated through the central injector system to adjust the pH value. To achieve this, an external pH value controller is directly connected to the plant's control. The generated hydrogen is diluted with fresh air through an ATEX-certified ventilator and discharged safely, the scaled down residual brine is disposed of. The salt dissolving water comes from a softener integrated in the plant. Thus, lime deposits can be prevented and a long service life of the electrolytic cell can be ensured. The efficiency of the electrolysis is monitored by an integrated pH measurement of the sodium hydroxide production.
The plants are controlled with a modern PLC with large, illuminated display and integrated modem for remote diagnosis and troubleshooting. The chlorine metering and the pH value correction are controlled as standard through contact inputs; analogue inputs are optionally available.
Advantages
- Robust technology
- Compact, space-saving design
- Safe vacuum plant technology
- Simultaneous production and metering of ultrapure hypochloric acid and sodium hypochlorite
- Chlorination and pH value adjustment with one single plant
- Economic operation thanks to the inexpensive raw material sodium chloride and less chemical consumption for pH value adjustment
Application Areas
- specifically economic alternative for all applications which require metering of hypochloric acid with simultaneous pH value correction
Features
- Electrolysis plant mounted ready for operation on a powder-coated stainless steel frame with programmable logic controller (PLC) in control cabinet
- integrated softener
- electrolytic cell
- pH value monitoring of electrolysis
- ATEX-certified bleeding system and side salt dissolving tank with level monitor
- Level sensors to monitor the storage tanks for sodium hypochlorite to be provided by the customer
- The scope of delivery also includes a central injector system matched to the plant to meter chlorine gas, sodium hypochlorite
- and sodium hydroxide, inclusive of a booster pump
- Automatic monitoring of the water hardness downstream of the softener and chlorine gas detector for plants from 600 g/h
Technical Data
(*) The process water consumption depends on the ratio between chlorine gas and stock production. Here, the value for a ratio 50 % : 50 % is given. |
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