One of the most important steps in maintaining the operation of the RO plant is to perform regular maintenance. This maintains the quality and longevity of the plant. Which reduces the cost and adds to its value over the years.<\/p>\n
The maintenance engineer must know the common indicators by which he identifies the problem and thus facilitates finding the solution in a timely manner.<\/p>\n
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Complete readings of the station are taken (pressures, salts, amps of wells, feeding pumps, checking voltages and Hertz for high-pressure pumps, and feeding water temperature for seawater stations). These readings are compared to the station readings before the problem occurred. Monitor the readings that have increased or decreased and make an analysis of these readings. The breakdowns are summarized as follows:<\/p>\n
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There is a leak in the connections or gaskets at the head of the well or the feeding line or the presence of a cut in the Well Master or a leak in the well couplings and pump stages.<\/p>\n
Low pressures of the station as a whole, especially the inlet pressure of the sand and cotton filter. The lower the productivity, the higher the water salts produced. You will also find a decrease in the flow rate of the feed water on the PLC panel. You may find no change or decrease in the amperage of the well pump.<\/p>\n
See your line manager, fix the connections and gaskets. Or contact the projects department if the problem calls for it. Or contact the Well Department to inspect the well parts. If there is no problem with the lines and connections.<\/p>\n
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Damage to the well pump stages or the presence of sand or gravel inside.<\/p>\n
Decreased pressure of the plant as a whole, especially an inlet pressure of the sand and cotton filter, decreased productivity, and increased product salts. You will also find a decrease in the flow rate of the feed water on the PLC panel. And an increase in the ampere of the well pump from its normal rate.<\/p>\n
See your line manager and contact the Well Department to investigate the problem.<\/p>\n
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The presence of reverse pressure on the well pump.<\/p>\n
Decreased pressure of the plant as a whole, especially the inlet pressure of the sand and cotton filter, decreased productivity and increased product salts. You will also find a decrease in the flow rate of the feed water on the PLC panel. And an increase in the ampere of the well pump from its normal rate.<\/p>\n
The well amp decreased slightly with an increase in the inlet pressure of the sand or cotton filter and a decrease in their exit pressures.<\/p>\n
It may be the result of a partial locking of the stopcock at the head of the well. Or entering another well on the same feeding line. Therefore, see your direct manager, and adjust the opening of the well stop or the feed pump.<\/p>\n
The sand filter needs backwashing or the cotton filter needs to be changed.<\/p>\n
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Damaged or worn high-pressure pump stages.<\/p>\n
The turbine pressure rises above its normal level, the pressure of entering the membranes decreases, and the H.P.P. Usually, there is a noticeable change in the voice.<\/p>\n
Calculate the efficiency of the H.P.P and monitor the wear temperature carefully. Report to your line manager and stop the station so the damage does not increase.<\/p>\n
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Damage to the turbine parts<\/p>\n
Low turbine exit pressure and higher H.P.P pressure than its normal level. The pressure of entering the membranes decreases, and a decrease in H.P.P amperes may occur as a result of the reverse pressure from the turbine.<\/p>\n
Calculate the efficiency of the turbine and inform your line manager, and stop the plant so that the damage does not increase.<\/p>\n
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Low turbine pressure and H.P.P<\/p>\n
It is usually the result of a decrease in the amount and pressure of the feed water. Or as a result of increased pressure on the sand or cotton filter or low voltage.<\/p>\n
Calculate the competencies, check the filters and report to your line manager.<\/p>\n
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High pressure turbine and H.P.P<\/p>\n
It is usually the result of dirt or crusting on the membranes. It is accompanied by a high \u2206P over the membranes. and output and H.P.P . amps<\/p>\n
Check HZ&rpm and report to your line manager.<\/p>\n
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PX sound higher than normal.<\/p>\n
Increasing the amount of feed water than the need for PX (accompanied by a decrease in the H.P.P inlet pressure)<\/p>\n
Low pressure LP out<\/p>\n
Not completely expelling the air from the station and PX unit<\/p>\n
Damage to the PX rotor<\/p>\n
Replace the high-pressure terminals for the low-pressure location of the PX unit during its installation<\/p>\n
Make sure the LP out is compressed and set to its normal level. Open the exhaust valves and make sure that there is no air inside the station. Notify your line manager.<\/p>\n
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High pressure entering and exiting membranes.<\/p>\n
High recovery (usually accompanied by an increase in production)<\/p>\n
Increasing mixing due to an increase in the amount of water leaving the membranes than the amount entering the PX (is accompanied by an increase in salts entering the membranes and salts of the product and a decrease in production<\/p>\n
Boost pump problem.<\/p>\n
Calculate the recovery and mixing and compare the values \u200b\u200bto their normal rates. And control the PX inlet and outlet valves to adjust pressures to normal levels.<\/p>\n
If the pressure of the inlet diaphragms is too high than the average, it means that there is a malfunction of the rotor or the booster pump, so stop the station immediately and inform your manager.<\/p>\n
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High salts of feed water<\/p>\n
An increase in the pressure of the station as a whole.<\/p>\n
Decreased production and increased product salts.<\/p>\n
May cause an increase in P on the membranes as a result of desquamation if neglected.<\/p>\n
Watch the station readings carefully and inform your line manager to check the water, and adjust the sediment injection rate.<\/p>\n
Make sure to rinse the station with well-produced water.<\/p>\n
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Low-temperature feed water for sea plants.<\/p>\n
Reduced production and product salts and a slight increase in station pressures.<\/p>\n
Monitor the temperature hourly, calculate the average at the end of the day, and report the results to your line manager for analysis.<\/p>\n
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Increased SDI or presence of sand and turbidity.<\/p>\n
Sand and cotton filter clogging speed.<\/p>\n
Repeated backwashing of the sand filter, which leads to instability of pressures and production.<\/p>\n
Damage to films and equipment may occur due to the presence of a large amount of sand.<\/p>\n
Do a sand filter backwash in perfection.<\/p>\n
Check the cotton filter and make sure that it is in good condition and that the wax is well attached and clean the sand carefully so that it does not enter the station.<\/p>\n
Report to your direct managers for filters, membranes and SDI metering.<\/p>\n
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Biocontamination or Natural Organic Materials (NOM)<\/p>\n
Production decreases with stable product salts and an increase in \u2206P on the membranes.<\/p>\n
Notify your line manager to do chemical cleaning, sanitizing or wetting the membranes.<\/p>\n
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Colloidal contamination (eg sand and some organic matter), metal oxide contamination (eg iron, manganese) or scaling.<\/p>\n
Production decreases with increasing product salts, and an increase in \u2206P on the membranes.<\/p>\n
Notify your line manager.<\/p>\n
Stop the station and rinse the station thoroughly with non-chlorine producing water.<\/p>\n
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membrane pressure<\/p>\n
Production decreases as product salts decrease and \u2206P on the membranes may decrease first.<\/p>\n
Check the temperature of the feedwater, if the station is running directly on seawater. As the symptoms are similar to a low temperature.<\/p>\n
Notify your line manager to investigate the problem.<\/p>\n
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organic pollution<\/p>\n
Production decreases with lower product salts and an increase in \u2206P on the membranes.<\/p>\n
Notify your line manager.<\/p>\n
Stop the station and rinse the station thoroughly with non-chlorine-producing water.<\/p>\n
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Membrane oxidation or mechanical damage.<\/p>\n
Increased production, product salts, and decreased membrane entry and exit pressure.<\/p>\n
Inform your direct manager.<\/p>\n
Stop the station and rinse the station thoroughly with non-chlorine-producing water.<\/p>\n
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O-ring or leakage membrane fitting<\/p>\n
Increased product salts with stable production in the reverse osmosis plant.<\/p>\n
Measure the salts of the pressure vessels, and do a probing test for vessels that give high readings.<\/p>\n
Notify your line manager, stop the station and replace the damaged parts inside the pressure vessel.<\/p>\n
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Membrane reduction.<\/p>\n
Increased product salts with stable production.<\/p>\n
Notify your line manager to inspect the membranes.<\/p>\n
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