{"id":4191,"date":"2015-11-06T01:40:51","date_gmt":"2015-11-06T01:40:51","guid":{"rendered":"https:\/\/kysearo.com\/?p=4191"},"modified":"2025-06-17T06:34:17","modified_gmt":"2025-06-17T06:34:17","slug":"how-to-clean-seawater-reverse-osmosis-system","status":"publish","type":"post","link":"https:\/\/kysearo.com\/da\/how-to-clean-seawater-reverse-osmosis-system\/","title":{"rendered":"S\u00e5dan renser du havvandssystemet med omvendt osmose"},"content":{"rendered":"

Seawater reverse osmosis technology is widely used in many applications due to its special advantages. Many users who are not technical might suffer a lot of problems about how to clean RO device, so it is necessary to manage sea water reverse osmosis system well for avoiding serious problems. There are mainly three kinds of cleaning ways for SWRO system \u00a0as follows:<\/p>\n

1. Lavtryksspuling System til omvendt osmose med havvand<\/span><\/strong><\/h3>\n

It is beneficial to remove the fouling at the surface of RO membrane in seawater desalination and maintain membrane performance by high flow flushing, low-pressure flushing, and low PH flushing of RO device regularly. Or when the SDI of water in RO device is suddenly above 5.5, it should adopt low-pressure flushing, and start up again after adjusting SDI.<\/p>\n

2. Reng\u00f8ring af SWRO-systemets nedlukningsbeskyttelse<\/span><\/strong><\/h3>\n

Due to production fluctuation, seawater reverse osmosis system unavoidably often shut down. It is necessary to take protective action when stopping at a short time or long time. Inappropriate treatment will lead to the membrane performance declining and not easy to recover.<\/p>\n

Korttidsbevaring er velegnet til systemet, der lukker ned mindre end 15 dage, og det kan vedtage hver 1. dag til 3 dage lavtryksskylning for at beskytte RO-enheden. Det konstateres, at n\u00e5r vandets temperatur er over 20, vil vand i RO-enhed til afsaltning af havvand blive stinkende inden for 3 dage og opdr\u00e6tte en masse bakterier. Derfor foresl\u00e5s det, at det vedtager lavtryksskylning en gang hver anden dag eller 1 dag, n\u00e5r vandtemperaturen er over 20. Og lavtryksspuling en gang hver 3. dag, n\u00e5r vandtemperaturen er under 20. Hver gang skal den lukke alle ind- og udl\u00f8bsventiler p\u00e5 RO-enheden efter skylning.<\/p>\n

Longtime shutdown protection is suitable for the system of above 15 days, at this moment it has to use protection fluid (bacteriostat) to protect RO device. Common bacteriostat is 1% sodium bisulfite solution(quality score)<\/p>\n

3. Kemisk reng\u00f8ring af SWRO-membran<\/span><\/strong><\/h3>\n

SWRO membrane might be also polluted by inorganic fouling, colloid, microbes, and metal oxide in the normal running conditions. When these substances accumulate at the surface of the membrane, it will cause the output of seawater reverse osmosis plant or desalination rate declining, rise the pressure difference and even damage membrane greatly. Thereby, to better recover production and desalination rate performance, chemical cleaning for RO membrane is also required.<\/p>\n

Whatever one of the following conditions, membrane element is requested to be cleaned:<\/strong><\/p>\n

    \n
  • Standardized production flow declines above 10%.<\/li>\n
  • The standardized pressure difference between inlet and concentrated increases by 15%.<\/li>\n
  • Standardized desalination rate increases by 5%.<\/li>\n
  • It is verified that there is pollution or scaling; Even though pressure difference does not increase by 15%, it has run for 3~4 months; When it requires to stop operating long time, it should be cleaned before stopping.<\/li>\n<\/ul>\n

    Reng\u00f8ringstemperaturen skal v\u00e6re under 15, fordi lavere temperatur kan for\u00e5rsage reng\u00f8ringseffekt. Den valgte reng\u00f8ringspumpe kan overvinde nedbrydning af sikkerhedsfilter, nedbrydning af membranelement og tab af r\u00f8rledninger osv. Generelt er det valgte tryk 0,3~0,5MPa.<\/p>\n<\/div>

    <\/div><\/div><\/div><\/div><\/div>

    F\u00e5 en l\u00f8sning i dag!<\/span><\/strong><\/p>\n<\/div>