The conductivity of water generated in the operation of RO reverse osmosis equipment has risen abnormally, and it is often not a single failure but a superposition of multiple factors.The diaphragm is covered by oxidation erosion or calcium-magnesium deposition for a long time, and the destruction of the physical structure of the desalination layer is the primary cause; if the backwash of the multi-media filter is not timely in the pretreatment process, the activated carbon adsorption is saturated, and the sediment and residual chlorine are driven straight into the membrane cavity for a long time to accelerate the deterioration; the membrane shell O-ring is deformed by thermal expansion and cold shrinkage or the central pipe weld cracks, allowing unfiltered raw water to flow directly into the water production pipeline; in addition, the pressure of the inlet pump is lower than the design value, and the temperature of the raw water in summer soars over 35℃, which will cause the desalination efficiency to fall precipitously.For troubleshooting and repair, the root cause must be locked one by one, rather than blindly changing the film in a whole group.
RO reverse osmosis equipment
Case 1: Emergency repair of calcium-magnesium fouling in the 10T/H system of the machinery processing plant in Xi'an Economic Development Zone
The RO reverse osmosis equipment of the plant has not been deeply maintained for three years of service, and the conductivity of the water produced has jumped from 10µs/cm all the way to 45µs/cm, and there are obvious water marks left after the workpiece is cleaned.The DIEN team was present for disassembly and inspection and found that the resin of the softening tank was completely compacted, and the white fouling on the surface of the two diaphragms was as thick as 0.3mm.Repair strategy: First regenerate and replace the softening resin to restore the hardness and interception ability, and then use a special citric acid solution to clean and peel off the fouling in online circulation. Only the two membranes that are irreversible damage to the desalination layer are replaced in a directional manner, and the automatic flushing frequency is increased synchronously.After being put into operation, the conductivity was locked within 7µs/cm. The customer said: "When other companies come up, they will push the full film replacement quotation to more than 100.000. DIEN's precise implementation only cost a fraction, and he also taught the maintenance rhythm by hand."
Case 2: Emergency repair of sealing failure of two-stage RO system in Xianyang Food Factory
The sudden increase in the conductivity of secondary water production caused the production line to be shut down, and the company's self-inspection of the filter element membrane components showed no abnormalities.DIEN was present for 4 hours to disassemble the secondary membrane shell, and found that the end sealing ring was thermally aging and cracked with a gap of about 2mm, and the raw water side leaked into the production water, and the filter element of the security filter had been perforated.Replace the seals and security filter elements in a full set on the spot, debug the recovery rate parameters after rinsing and disinfecting, and resume production in half a day. The secondary conductivity is stable below 1.8µs/cm.The person in charge sighed: "The shutdown is losing tens of thousands of dollars per hour. DIEN's fast response, accurate positioning, and transparent quotation have saved our entire production line."
The high conductivity of RO reverse osmosis equipment is by no means a matter of membrane replacement. Standardized inspection and accurate traceability are the key to cost reduction.DIEN Water treatment provides a full range of fault diagnosis, membrane cleaning, parts replacement and long-term operation and maintenance hosting. It comes to the door within 2 hours throughout Shaanxi to help enterprises quickly lock in the crux and efficiently repair water quality.
