Dry goods I Reverse osmosis troubleshooting and solutions
Published Time:
2024-03-18
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Reverse osmosis system malfunctions are mainly categorized into three types: reduced permeate flux, increased salt passage rate (decreased desalination rate), and increased pressure drop. However, there are many reasons for these malfunctions. It is important to identify the root cause of these malfunctions to implement timely maintenance and repair strategies.
Analysis and solutions for reverse osmosis system malfunctions are mainly approached from four aspects:
I. External factors causing reverse osmosis malfunctions;
II. Common malfunctions of reverse osmosis devices;
III. Common malfunction analysis of reverse osmosis systems;
IV. Common malfunction solutions for reverse osmosis systems.
1. Reverse osmosis malfunctions caused by changes in feed water quality
◆ Changes in feed water quality;
◆ Suboptimal pretreatment system.
2. Reverse osmosis malfunctions caused by pretreatment
◆ Multi-media filter media disorder or channeling;
◆ Severe bacterial and microbial growth in the buffer tank;
◆ Powdering or severe microbial growth of activated carbon filter media.
3. Reverse osmosis malfunctions caused by security filters
◆ Security filter diameter is too small;
◆ Poor filter cartridge quality, filtration accuracy does not meet requirements;
◆ Filter cartridge is not tightly pressed and is easily deformed.
4. Reverse osmosis malfunctions caused by antiscalant dosing system
◆ Antiscalant performance does not match water quality;
◆ Unreliable antiscalant metering pump performance;
◆ Excessive dilution of antiscalant and severe tank contamination;
◆ Channeling caused by antiscalant dosing.
5. Reverse osmosis malfunctions caused by other dosing systems
◆ Inappropriate flocculants lead to membrane fouling;
◆ Excessive addition of oxidants causes membrane oxidation;
◆ Excessive addition of reducing agents causes severe membrane blockage.
6. Reverse osmosis malfunctions caused by instruments and meters
◆ High concentrate flow rate reading (actually lower) causes excessive reverse osmosis recovery rate leading to scaling;
◆ Low concentrate flow rate reading (actually higher) causes low reverse osmosis recovery rate leading to excessive pressure difference;
◆ Fluctuations in flow rate readings cause system misjudgment.
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