Why do the seals in reverse osmosis equipment swell?

Why do the seals in reverse osmosis equipment swell?

Water treatment equipment in reverse osmosis equipment in order to achieve the membrane shell between the zones of sealing isolation, the membrane shell requires three types of sealing rubber ring. In order to reduce the installation resistance system installation should be in each seal ring surface coated with water or glycerin.

It should be noted that lubricants such as petroleum jelly or other petroleum-based grease lubricants should be used with caution, as this will cause cracking of the fresh water tubes and in particular swelling of the seals. The expansion of the rubber ring generally does not directly affect the operating effect of the system, but will affect the system after unloading and loading again, that is, the loading of the expanded rubber ring is difficult to enter the tank.

Reverse osmosis equipment process of each original water production consistent?

Reverse osmosis equipment due to the membrane element of the feed water end and the concentration of water end of the pressure difference between the membrane pressure drop, and because each element of the concentration of water salt content are higher than the salt content of the feed water, so each element of the feed water permeate pressure along the system process is rising.

If we ignore the fresh water back pressure and osmotic pressure, the water yield of each membrane element along the system process will be proportional to the difference between the respective working pressure and osmotic pressure, i.e. the water yield of each membrane element gradually decreases.

Does pH have an effect on the removal rate and life of the reverse osmosis membrane?

Reverse osmosis equipment as the main filtration process in the water treatment equipment, so in the raw water into the reverse osmosis membrane, the pH value of raw water will not bring harm to the reverse osmosis membrane, generally speaking, the material of reverse osmosis membrane is mostly composite membrane material, this membrane material in use if the pH value of the product according to the range, generally 2-11, then the pH value of the membrane itself to bring harm and influence is relatively small. The effect of pH on the membrane itself is less.

The effect of pH on the desalination rate of the reverse osmosis membrane is influenced by the properties of the ions in the water itself, which are affected by the pH value, due to the acidity, alkalinity, decomposition and charge of the ions themselves, which are all factors that can lead to a reduction in the desalination rate of the membrane.

This shows that pH has a significant impact on the desalination rate of certain impurities. Similarly, if the CO2 removal rate of a reverse osmosis membrane is zero, increasing the pH of the raw water and converting the CO2 to CO32- will allow the membrane to desalinate effectively. However, special attention should be paid to the fouling of the reverse osmosis membrane at this time.