How to reduce the fouling of the reverse osmosis membrane of the laboratory water purifier?

     After long-term use of laboratory water purifiers, scaling will occur more or less, and this situation will affect its filtration system. As the core filter element of the ultrapure water machine, the reverse osmosis membrane will inevitably affect the water production efficiency once scaling occurs. Although invisible to the human eye, they can quickly block reverse osmosis systems, increasing the cost of pure water production.

How to prevent scaling of laboratory water purifiers mainly requires the pretreatment of raw water, with special attention to the qualification of the pollution index, that is, through the pre-reverse osmosis membrane system, the substances that are easy to scale in the raw water, such as calcium and magnesium ions, are removed in advance. Secondly, we should do a good job of controlling bacteria to avoid the breeding of bacteria in the ultrapure water machine, maintain the turbulent state of the brine side, reduce the concentration polarization of the solution on the surface of the membrane, and avoid the precipitation of some insoluble salts on the surface of the membrane, causing junction Scale phenomenon occurs. Pay attention to the change of raw water quality to avoid the rapid decline of reverse osmosis membrane caused by the change of raw water quality.

Methods to reduce the scaling of reverse osmosis membranes of laboratory water purifiers:

1. Do a good job in the pretreatment of raw water, and pay special attention to the qualified pollution index. At the same time, sterilization should be carried out to prevent the growth of microorganisms in the container, and attention should be paid to the damage of chloride ions to the membrane.

2. When the water output of the reverse osmosis equipment is significantly reduced, indicating that the membrane is fouled or polluted, chemical cleaning should be carried out.

3. In the operation of reverse osmosis equipment, it is necessary to maintain a suitable operating pressure. Generally, increasing the pressure will increase the water production, but if it is too large, the membrane will be compacted.

4. When the reverse osmosis equipment is out of operation, dosing and flushing should be carried out in the short term, and formaldehyde protection should be added in the long term.

5. During the operation of the reverse osmosis equipment, the turbulent state of the brine side should be maintained to reduce the concentration polarization of the solution on the membrane surface and avoid the precipitation of some insoluble salts on the membrane surface.

6. Regularly analyze the water quality of the raw water, and adjust the dosage of the antiscalants according to the dosing plan provided by the Ministry according to the water quality.

7. When an abnormality occurs in the reverse osmosis system, immediately shut down for processing to avoid the expansion of the accident.

8. Strictly prevent the dosing equipment from running, running, dripping, and leaking, and adding the liquid medicine to the reverse osmosis influent water can really prevent scaling.

9. It is recommended to change the flushing method after the reverse osmosis equipment is out of operation to flushing with demineralized water.

The above are several methods to reduce the scale of the reverse osmosis membrane of the laboratory water purifier. Of course, in addition to these methods to reduce the scale, regular cleaning is also very important.