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          行業資訊 公司動態

          水處理設備反滲透膜污染后清洗方法

          2019-07-25

          一、反滲透膜組分的污染物
           
          I. Pollutants in Reverse Osmosis Membrane Components
           
           
          在反滲透膜設備運行一段時間后,反滲透膜元件將被水中的懸浮固體或不溶物質污染。這些污染物中比較常見的是碳酸鈣垢,硫酸鈣垢,金屬氧化物垢和硅沉積物。和有機或生物沉積物。污染物的性質和污染率與供水條件有關。污染正在慢慢發展。如果不及早采取措施,污染將損害反滲透膜元件的性能并在相對短的時間內減少反滲透膜的使用時間。
           
          After a period of operation of RO membrane equipment, RO membrane components will be contaminated by suspended solids or insoluble substances in water. The most common of these pollutants are calcium carbonate scale, calcium sulfate scale, metal oxide scale and silicon deposit. And organic or biological sediments. The nature and pollution rate of pollutants are related to water supply conditions. Pollution is slowly developing. If early measures are not taken, pollution will damage the performance of RO membrane components and reduce the use time of RO membrane in a relatively short time.
           
           
           
          定期檢查系統的整體性能是確認膜組件污染的好方法。不同的污染物會對膜組件的性能造成不同程度的損害。
           
          Regular inspection of the overall performance of the system is a good way to confirm the fouling of membrane components. Different pollutants will cause different degrees of damage to the performance of membrane modules.
           
           
          二、去除反滲透膜污染物
           
          Removal of Pollutants from Reverse Osmosis Membranes
           
          反滲透膜污染物的去除可以通過化學清洗和物理沖洗來實現,有時通過改變操作條件來實現。作為一般規則,當發生下列情況之一時,應進行反滲透膜清潔。
           
          Removal of pollutants in reverse osmosis membranes can be achieved by chemical cleaning and physical washing, sometimes by changing operating conditions. As a general rule, reverse osmosis membranes should be cleaned when one of the following situations occurs.
           
          1.在常壓下,產出水的水流量下降到正常值的10到15%。
           
          1. At atmospheric pressure, the water flow rate of the produced water decreases to 10-15% of the normal value.
           
          2.為了保持產品的出水流量,經過溫度校正的給水壓力增加10到15?
           
          2. In order to maintain the output flow of the product, the temperature-corrected feed water pressure is increased by 10 to 15?
           
          3.反滲透水的水質降低10至15℃,鹽滲透率增加10至15℃
           
          3. Water quality of reverse osmosis water decreases by 10-15 C and salt permeability increases by 10-15 C.
           
          4.使用壓力增加10到15?
           
          4. Use pressure increased by 10 to 15?
           
          5. RO膜的壓差在不同時間段內顯著增加。
           
          5. The pressure difference of RO film increased significantly in different time periods.
           
          三、反滲透膜的常見污染物及其去除方法:
           
          Common pollutants in reverse osmosis membranes and their removal methods:
           
          1,碳酸鈣垢
           
          1. Calcium carbonate scale
          當阻垢劑添加系統失效或出現酸系統時,進水的pH升高,然后可沉積碳酸鈣。應盡早發現碳酸鈣垢的沉淀,以防止晶體在反滲透膜表面生長。造成損害,并且早期發現碳酸鈣垢??梢酝ㄟ^將進料水的pH值在3.0和5.0之間運行1至2小時來除去。對于沉淀時間較長的碳酸鈣垢,應使用檸檬酸清洗液進行循環清洗或過夜浸泡。
           
          When the scale inhibitor system fails or acid system appears, the influent pH increases, and then calcium carbonate can be deposited. The precipitation of calcium carbonate scale should be detected as soon as possible to prevent crystal growth on the surface of RO membrane. Damage and early detection of calcium carbonate scale. It can be removed by running the feed water between 3.0 and 5.0 for 1 to 2 hours. For calcium carbonate scale with long precipitation time, citric acid cleaning solution should be used for cyclic cleaning or overnight soaking.
          確保任何清潔溶液的pH值不低于2.0,否則可能會對RO膜元件造成損壞,尤其是在溫度較高時。最高pH值不應高于11.0。使用氨來增加pH值,使用硫酸或鹽酸來降低pH值。
           
          Ensure that the pH value of any clean solution is not less than 2.0, otherwise RO membrane components may be damaged, especially at higher temperatures. The highest pH value should not be higher than 11.0. Ammonia is used to increase the pH value, and sulfuric acid or hydrochloric acid is used to reduce the pH value.
           
          2,硫酸鈣垢
           
          2. Calcium sulfate scale
           
          清潔溶液是從反滲透膜表面除去硫酸鈣垢的比較好的方法。
           
          Clean solution is the best way to remove calcium sulfate scale from the surface of reverse osmosis membrane.
           
          3,金屬氧化物垢
           
          3. Metal oxide scale
           
          可以使用如上所述的去除碳酸鈣垢的方法除去沉積的氫氧化物。
           
          The deposited hydroxides can be removed by removing calcium carbonate scale as described above.
           
          4,硅標度
           
          4. Silicon scale
           
          對于不與金屬化或有機材料共生的硅垢,它們只能通過特殊的清潔方法去除。詳細方法是聯系海德能源。
           
          For silica scale that does not coexist with metallized or organic materials, they can only be removed by special cleaning methods. The detailed method is to contact Hyde Energy.
           
          5,有機沉積物
           
          5. Organic sediments
           
          可以用清潔溶液除去有機沉積物(例如微生物粘液或霉菌)。為了防止再傳播,應使用專業的滅菌解決方案在系統中循環和浸泡。通常,浸泡它需要很長時間,例如反滲透設備。使用三天后,必須進行消毒。
           
          Organic sediments (such as microbial mucus or fungi) can be removed with clean solutions. In order to prevent re-transmission, professional sterilization solutions should be used to circulate and immerse in the system. Usually, it takes a long time to soak it, such as reverse osmosis equipment. After three days of use, it must be disinfected.
          四、清洗反滲透膜組件的一般步驟:
           
          4. General steps for cleaning RO membrane assemblies:
           
          1.將清潔,無游離的無氯反滲透產品水從清洗罐泵入壓力容器并將其排出幾分鐘。
           
          1. Pump clean, free chlorine-free reverse osmosis product water from the cleaning tank into the pressure vessel and discharge it for a few minutes.
           
          2.使用干凈的產品水在清潔槽中準備清潔溶液。
           
          2. Use clean product water to prepare cleaning solution in the cleaning tank.
           
          3.將清潔溶液在壓力容器中循環1小時或預設時間。
           
          3. Circulate clean solution in pressure vessel for 1 hour or preset time.
           
          4.清潔完成后,排空清洗槽并沖洗,然后用清潔的產品水填充清洗槽進行進一步清洗。
           
          4. After cleaning, empty the cleaning tank and rinse it, then fill the cleaning tank with clean product water for further cleaning.
          5.沖洗反滲透系統后,運行反滲透系統,打開產品排水閥,直至產品水清潔,無泡沫或無清潔劑。
           
          5. after washing the reverse osmosis system, run the reverse osmosis system, open the product drain valve until the product water is clean, no foam or no cleaning agent.
           
          反滲透膜需要定期沖洗,如果反滲透膜受到污染后要清洗消毒,保證反滲透設備運行正常、出水水質合格。
           
          The reverse osmosis membrane needs to be washed regularly. If the reverse osmosis membrane is contaminated, it should be cleaned and disinfected to ensure the normal operation of the reverse osmosis equipment and the quality of the effluent is qualified.

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