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Principle and process of reverse osmosis element membrane desalination

Author:Huamo Water treatment materials FROM:Water filter membrane manufacturer TIME:2021-11-26

When considering the desalination rate index value, we need to consider other key index values of system performance as a whole, that is, customers should know how each ro membrane manufacturers creates their product performance standards, and the main product performance parameters they give may be compared with The specific performance of existing customer specific systems is different.

reverse osmosis element membrane

1. Desalination process of reverse osmosis element membrane

Reverse osmosis element membrane are used to remove soluble salts from water. When water passes quickly, the efficiency of soluble salts through the membrane is very slow. Of course, under the permeation standard, water diffuses through the semi-permeable membrane to the higher salinity side, which is convenient for balancing the concentration and compressive strength of the substances on both sides of the membrane. In order to better get rid of or reverse the development trend of this fusion, applying pressure to the high concentration of seepage water will produce pure permeate.

ro system membrane

2. Desalination principle of reverse osmosis element membrane

Salt rejection is a measure of the resistance of reverse osmosis element membrane to soluble positive ions, which can remove thousands of different positive ions. Except for some special cases, the removal rate of divalent positive ions by reverse osmosis is higher than that of monovalent positive ions. Therefore, if the NaCl surface has an excellent removal rate, it may also have a strong removal rate for iron, calcium, magnesium, sulfate and other divalent positive ions. Therefore, NaCl is widely used as a national standard material to comment on the performance of the positive ion removal rate of ro system membrane.

When choosing a ro system membrane, the diffusion coefficient value of the membrane, the total flow rate, the working pressure required by the system, the destruction speed of the membrane, the cleanliness of the membrane, the carrying capacity of the whole process of chemical water treatment, and the long-term firmness should be the key considerations. factor. Each of the above influencing factors will directly affect the equipment failure rate, the total water production rate and the corresponding investment and operating costs of the customer's water treatment device.

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