1. The Harm of Inflow Working Pressure on Reverse Osmosis Membrane

The water inlet working pressure itself does not pose a risk to excessive salt penetration, but the increase in water inlet working pressure causes the net working pressure of the RO reverse osmosis drive to increase, leading to an increase in water production. In addition, excessive salt penetration basically does not change, and the increased water production dilutes the salt content that passes through the membrane, reducing the salt penetration rate and improving the desalination rate. When the working pressure of the inflow exceeds a certain value, the excessive utilization rate increases the channel effect, which in turn leads to an increase in salt permeability, offsetting the increased water production and preventing further increase in desalination rate.

2. Harm of inlet water temperature to reverse osmosis membrane

The redox potential of water production in reverse osmosis membranes is highly sensitive to the change in inlet water temperature. As the temperature increases, the diffusion coefficient of water also increases linearly. For every 1 ℃ increase in inlet water temperature, the water production increases by 2.5% -3.0%; (Using 25 ℃ as the standard)

3. Harm of influent pH value to reverse osmosis membrane

The pH value of the influent has little harm to the water production, but it poses a significant threat to the desalination rate. A pH value between 7.5 and 8.5 results in a high desalination rate.

4. Harm of salt content in influent to reverse osmosis membranes

Permeation concentration is the percentage of salt or organic compound concentration in water. The higher the salinity of the influent, the greater the concentration difference, and the higher the salt penetration rate, which in turn leads to a decrease in desalination rate.

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