With the increase in the utilization rate of pure water equipment, some users have found that there are occasional problems with pure water equipment during use, such as fouling of the reverse osmosis membrane of bottled water filling machines and water leakage at the joints of pure water equipment. Many users don’t mind at first, but the problem may become more and more serious over time, and maintenance will be troublesome. The editor will give us a brief explanation of the fouling of the reverse osmosis membrane of the glass bottle filling machine. When the pure water equipment is in operation, fresh water will be produced during the low-pressure flushing process, and the concentration of the water on both sides will naturally increase, which will also lead to the increase of the concentration of salt. The salt contains a lot of substances that can be deposited. Over time, scaling will occur Phenomenon. In addition, uneven dosing is also an important reason for fouling of reverse osmosis membranes. Secondly, leakage of antiscalant equipment is relatively serious, which may affect the dosage of reverse osmosis plus antiscalant. Failure to pay enough attention during the operation process, and failure to flush in time during the shutdown process will also lead to fouling of the reverse osmosis membrane.

The above points are the reasons for the fouling of the reverse osmosis membrane of pure water equipment, so users should pay attention to these problems when using pure water equipment, so as to prevent the fouling of the reverse osmosis membrane from causing some troubles to production. During the long-term work of the reverse osmosis membrane of the reverse osmosis equipment, it may be polluted by inorganic salt scale, metal oxide film machine scale, colloidal scale, suspended solid matter scale, etc., resulting in non-compliance with the regulations.

When should the reverse osmosis membrane be cleaned

  1. The water production rate is 10-15% lower than the normal value.
  2. The desalination rate is reduced by less than 90%.
  3. The pressure difference of the membrane tube is too large > 10%.

Reverse osmosis membrane cleaning process

  1. Wet the membrane before cleaning.
  2. Record DOTA before the test after boarding the computer.
  3. Chemical cleaning (using RCB-alkali) → record.
  4. Chemical cleaning (using RCA-acid) → record.
  5. Soak the preservation solution.

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