How many malfunction problems have you encountered during the operation of the reverse osmosis (RO) pure water system? How to solve it?-Yuanlai Water Treatment

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How many malfunction problems have you encountered during the operation of the reverse osmosis (RO) pure water system? How to solve it?

Released Date: Apr 06,2023 Article Source: Yuanlai Water Treatment

The main fault phenomena of reverse osmosis systems fall into three categories: reduced water permeability, increased salt permeability (decreased desalination rate), and increased pressure drop. However, there are many causes for these faults. It is necessary to try to identify the essence of the problem from these fault phenomena as soon as possible, so as to implement maintenance and repair measures as soon as possible. Now, let's take a detailed look together at some faults that occur during the operation of reverse osmosis systems and provide relevant solutions!

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Reverse osmosisROPure water equipment

There are mainly three types of fault phenomena in reverse osmosis systems:The water permeability decreases while the salt permeability increases(The desalination rate has decreased)And the pressure drop has increased. However, there are many causes of these faults. We should try to find the essence of the problem from these fault phenomena as much as possible, so as to implement maintenance and repair measures as soon as possible.

Now, let's take a detailed look togetherAnalyze some faults that occur during the operation of reverse osmosis systems and provide relevant solutions!

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0 1

External factors causing reverse osmosis failure

1Reverse osmosis failure caused by changes in the quality of the influent water

◆ Changes in influent water quality;

◆ The pretreatment system cannot be optimized.

2Reverse osmosis faults caused by pretreatment

◆ The filter material of the multi-media filter is disordered or has an uneven flow.

◆ The buffer water tank is severely infested with bacteria and microorganisms.

◆ The filter material of the activated carbon filter is severely powderized or infested with microorganisms.

3Reverse osmosis failure caused by the security filter

◆ The diameter of the security filter is too small.

◆ The quality of the filter element is poor and the filtration accuracy fails to meet the requirements.

◆ The filter element cannot be pressed tightly and is prone to deformation.

4Reverse osmosis faults caused by the scale inhibitor dosing system

◆ The performance of the scale inhibitor does not match the water quality.

◆ The performance of the scale inhibitor metering pump is unreliable.

◆ Excessive dilution of the scale inhibitor and severe contamination of the medicine tank;

◆ The addition of scale inhibitors causes flow deviation.

5Reverse osmosis faults caused by other dosing systems

◆ Inappropriate flocculants cause membrane element contamination.

◆ Excessive addition of oxidants causes the membrane elements to be oxidized.

◆ Excessive addition of reducing agent causes severe fouling of membrane elements.

6Reverse osmosis faults caused by instruments and meters

◆ The concentrated water flow rate is shown to be too large (actually too small), which causes the reverse osmosis recovery rate to be too high and leads to scaling.

◆ The concentrated water flow rate is shown to be too small (actually quite large), which causes the reverse osmosis recovery rate to be too low and generates an excessive pressure difference.

◆ Fluctuations in flow readings cause system judgment errors.

0 2

Common faults of reverse osmosis devices

1,When the head of the high-pressure pump was selected at the initial design stage, it was too low. As a result, when the temperature or the quality of the influent water changed, the water production volume failed to meet the design requirements.

2,The oxidation of membrane elements leads to an increase in water flux and a decline in the quality of the produced water.

3,The inversion of the salt water sealing ring leads to an excessively high actual recovery rate, resulting in scaling and a decline in water quality.

4,The damage of the salt water sealing ring causes the actual recovery rate to be too high, resulting in scaling and a decline in water quality.

5,OThe damage of the ring causes a decline in the quality of the produced water.

6,The mixed use of new and old membrane elements and different types of membrane elements leads to a decline in system performance.

7,The overlapping or partial overlapping of the concentrated water thrust ring and the concentrated water outlet of the pressure vessel causes an excessively high recovery rate and leads to scaling.

8,The excessive length of the pressure vessel causes concentrated water to leak to the water production side, resulting in a decline in the quality of the produced water.

Keywords: Water Softening Equipment Automatic Water Softener Reverse Osmosis Equipment Manufacturer of Water Treatment Equipment

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