Why is the water output of single-stage reverse osmosis pure water treatment equipment smaller-Ocpur

Why is the water output of single-stage reverse osmosis pure water treatment equipment smaller?

by:Ocpuritech     2021-06-15
Why is the water output of single-stage reverse osmosis pure water treatment equipment smaller? Author: Single-stage reverse osmosis water treatment equipment is used in industrial production up to a water treatment device, the user brings a lot of convenience and benefits. The reverse osmosis membrane used in the single-stage reverse osmosis pure water treatment equipment has a very small pore size, and the osmotic pressure of the aqueous solution is used to separate water molecules and impurities to achieve a thorough purification of water quality. The decrease in water production of single-stage reverse osmosis pure water treatment equipment will directly affect the use of users, so here is a brief introduction to the reasons for the decrease in water production of single-stage reverse osmosis pure water treatment equipment.  1. Under the same inlet pressure on the water production side, the pressure is set on the water production side or the water production pipeline is too small, the delivery point is far, and the resistance is large, resulting in a decrease in net pressure and a decrease in water production.  2. Equipment maintenance is not timely. Single-stage reverse osmosis pure water treatment equipment lacks corresponding daily maintenance operations. Generally, quartz sand, activated carbon, and front-end filter of softener are not maintained properly, and the security filter element is not replaced in time or even.  3. The pressure difference is normal. For a 6-core 8040 membrane element, the pressure difference between the two sections is about 3~4bar. Unreasonable piping design leads to large pressure loss or incomplete closure of the second-stage concentrated water discharge valve, which will lead to a decrease in net pressure and thus a decrease in water production.  4, the reading error of the instrument, the pressure gauge and the flow meter are not calibrated before use, and the reading is not accurate. The installation position of the pressure gauge is far away from the two ends of the pressure vessel, and its reading contains the pressure loss of the pipeline, but when it is used as the inlet pressure, the inlet pressure is lower and the water production is lower. 5. The inlet water conductivity (or TDS) is much higher than the design value. For the NaCL solution, the osmotic pressure increases by about 11.4 psi (0.8 bar) for every 1000 ppm increase in TDS. Under the same inlet pressure, the water production will be reduce.
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