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  • 水处理设备反渗透膜污染后清洗方法
  • 本站编辑:杭州崇高环境科技有限公司发布日期:2019-07-25 11:57 浏览次数:
一、反渗透膜组分的污染物
 
I. Pollutants in Reverse Osmosis Membrane Components
 
 
在反渗透膜设备运行一段时间后,反渗透膜元件将被水中的悬浮固体或不溶物质污染。这些污染物中最常见的是碳酸钙垢,硫酸钙垢,金属氧化物垢和硅沉积物。和有机或生物沉积物。污染物的性质和污染率与供水条件有关。污染正在慢慢发展。如果不及早采取措施,污染将损害反渗透膜元件的性能并在相对短的时间内减少反渗透膜的使用时间。
 
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.
 
 
 
定期检查系统的整体性能是确认膜组件污染的好方法。不同的污染物会对膜组件的性能造成不同程度的损害。
 
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、去除反渗透膜污染物
 
Removal of Pollutants from Reverse Osmosis Membranes
 
反渗透膜污染物的去除可以通过化学清洗和物理冲洗来实现,有时通过改变操作条件来实现。作为一般规则,当发生下列情况之一时,应进行反渗透膜清洁。
 
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.在常压下,产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.为了保持产品的出水流量,经过温度校正的给水压力增加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.反渗透水的水质降低10至15℃,盐渗透率增加10至15℃
 
3. Water quality of reverse osmosis water decreases by 10-15 C and salt permeability increases by 10-15 C.
 
4.使用压力增加10到15?
 
4. Use pressure increased by 10 to 15?
 
5. RO膜的压差在不同时间段内显着增加。
 
5. The pressure difference of RO film increased significantly in different time periods.
 
三、反渗透膜的常见污染物及其去除方法:
 
Common pollutants in reverse osmosis membranes and their removal methods:
 
1,碳酸钙垢
 
1. Calcium carbonate scale
当阻垢剂添加系统失效或出现酸系统时,进水的pH升高,然后可沉积碳酸钙。应尽早发现碳酸钙垢的沉淀,以防止晶体在反渗透膜表面生长。造成损害,并且早期发现碳酸钙垢。可以通过将进料水的pH值在3.0和5.0之间运行1至2小时来除去。对于沉淀时间较长的碳酸钙垢,应使用柠檬酸清洗液进行循环清洗或过夜浸泡。
 
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.
确保任何清洁溶液的pH值不低于2.0,否则可能会对RO膜元件造成损坏,尤其是在温度较高时。最高pH值不应高于11.0。使用氨来增加pH值,使用硫酸或盐酸来降低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,硫酸钙垢
 
2. Calcium sulfate scale
 
清洁溶液是从反渗透膜表面除去硫酸钙垢的最佳方法。
 
Clean solution is the best way to remove calcium sulfate scale from the surface of reverse osmosis membrane.
 
3,金属氧化物垢
 
3. Metal oxide scale
 
可以使用如上所述的去除碳酸钙垢的方法除去沉积的氢氧化物。
 
The deposited hydroxides can be removed by removing calcium carbonate scale as described above.
 
4,硅标度
 
4. Silicon scale
 
对于不与金属化或有机材料共生的硅垢,它们只能通过特殊的清洁方法去除。详细方法是联系海德能源。
 
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,有机沉积物
 
5. Organic sediments
 
可以用清洁溶液除去有机沉积物(例如微生物粘液或霉菌)。为了防止再传播,应使用专业的灭菌解决方案在系统中循环和浸泡。通常,浸泡它需要很长时间,例如反渗透设备。使用三天后,必须进行消毒。
 
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、清洗反渗透膜组件的一般步骤:
 
4. General steps for cleaning RO membrane assemblies:
 
1.将清洁,无游离的无氯反渗透产品水从清洗罐泵入压力容器并将其排出几分钟。
 
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.使用干净的产品水在清洁槽中准备清洁溶液。
 
2. Use clean product water to prepare cleaning solution in the cleaning tank.
 
3.将清洁溶液在压力容器中循环1小时或预设时间。
 
3. Circulate clean solution in pressure vessel for 1 hour or preset time.
 
4.清洁完成后,排空清洗槽并冲洗,然后用清洁的产品水填充清洗槽进行进一步清洗。
 
4. After cleaning, empty the cleaning tank and rinse it, then fill the cleaning tank with clean product water for further cleaning.
5.冲洗反渗透系统后,运行反渗透系统,打开产品排水阀,直至产品水清洁,无泡沫或无清洁剂。
 
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.
 
反渗透膜需要定期冲洗,如果反渗透膜受到污染后要清洗消毒,保证反渗透设备运行正常、出水水质合格。
 
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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