Replacing gas chlorinators with electro-chlorinators

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I need suggestions for replacing gas chlorinators 4 Kg/Hr capacity with Electro-chlorinators.

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13 Answers

  1. Dear Mr Ashis 

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    1 Comment

    1. Please do not tag me in spam comments.  Moderators, can you please remove this?

  2. Depending  on what you are trying to achieve, purpose built photo catalytic oxidation / disinfection might be a long term viable alternative.   Happy to assist.

  3. Electro-chlorination can be either with a membrane system (producing chlorine gas or a high concentration of hypochlorous acid), or non-membrane (producing a lower concentration of hypochlorous acid, typically < 1%).  The non-membrane systems  have the advantage of low maintenance and lower operational attention, with the feed water quality being less stringent.  Either system requires cleaning of the electrodes (acid wash) from time to time, while the membrane systems also require membrane flushing and replacement.  Pre-softening the water helps to minimise scale formation on the electrodes.

  4. Hi

    Different scenarios and aspects to be considered:

    - if the system is for drinking water: all components must comply with local regulations, in USA is  NSF or equal

    - there is more flexibility is the application is for waste water or industrial effluent

    On either case, always is good to compare CAPEX and OPEX and safety issues

    CAPEX for gas chlorination can be high if emergency infrastructure is required, like scrubber systems in case of emergency leaks. Gas chlorination close to schools and/or communities is always a concern!

    OPEX for gas chlorination we all know are lower as compared with electro chlorination             (man hour + salt+ power+parts) For industrial or WWTP effluents sea water can be an option for offset salt consumption.

    Not a bad idea to include other options like liquid bleach, UV in your analysis for your disinfection needs

     

  5. Envirolyte Generators typically produce up to 95% Hypochlorous Acid (HOCL), its efficacy is 100 to 300% more effective than Sodium Hypochlorite (SH). Our low salt and low energy machines provide very competitive running costs, as does our whole range of generators.

    HOCL is environmentally friendly and is a fully biodegradable product that offers excellent health & safety benefits compared to SH.

    If you need some more information please email john@envirolyte.co.uk

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  6. The manufacturers of Electro chlorinators will give the advantages. Please call 0 91766 25082  Mr. Jeyakumar,  Managing Director, Tianno.  This company manufactures and sells various models  and capacities of Electro chlorinators.

     

  7. Maintenance of Electro chlorinator will be difficult so continue with Gas chlorinator,if possible which is cheaper too.

  9. We ran a cost analysis because it has been assumed gas chlorine was the lowest cost for wastewater disinfection. Low-salt sodium hypochlorite 12% came out on top mostly due to reduced maintenance, equipment and safety training costs.

    Electro-chlorinators are used at our water plant, so we had an idea of the maintenance and cost of operation. We are required to have redundancy, two water softeners, two brine pumps, two 50Kg/D electro chlorinators, and two feed pumps. The hypochlorite system has a tank and two feed pumps.

     

     

  10. Several points to consider.  It would probably be best to size the generator on the daily demand rather than the chlorinator capacity and aim to generate in a few hours less than 24. That way you can ensure enough hypochlorite even when the cell performance starts to degrade.

    In the past some used to size generators to produce the days supply in a few hours to use off peak electricity. However unless there is a supply of really cheap off peak electric this is unlikely to be commercially viable.

    I would not have a standby cell as long as it is possible to get a drum of commercial hypochlorite to site in a day, which should be the capacity of the hypochlorite storage. Instead rely on diluting the commercial hypochlorite to the 1% approx. of the normal generation. If getting the supply there is tricky you could have a few drums on site but make sure to use them to turn over stock in a month. 

    Also it all depends on the softener actually being effective. 

  11. Miox works well, but they got bought out by Johnson Matthey. I'm assuming the driver is to get away from chlorine gas. Just make sure you can easily get salt or concentrated brine easily