Water purification equipment in the daily operation of the need for regular care which includes regular flushing of water purification equipment and daily operation and maintenance. The following Jiajie pure water equipment department for you to share the maintenance of pure water equipment and its precautions.
One, the maintenance of the pre-processor:
Quartz sand, activated carbon filter according to the raw water quality to determine the cleaning cycle: raw water for the tap water is generally a week (calculated on the basis of 7 days) flushing, raw water for groundwater, river water, well water and other water quality is generally three days time flushing to ensure that the pre-processor deposits of sediment, impurities, particles in a timely manner to exclude.
Security filter import and export pressure difference rises (> 0.06Mpa), the filter element must be replaced to ensure the normal operation of the RO device. Suggestion: Every three days the filter element must be removed for inspection and cleaning. Filter replacement cycle depends on the quality of its water intake, generally replaced every 15 days.
Two, reverse osmosis unit maintenance:
1: regular regular records of RO device various operating parameters. Recommendation: every two hours to record the RO unit of various operating parameters.
2: with the growth of the operating time, the membrane surface will be attached to the sediment, affecting the water permeability, it is necessary to regularly clean the RO element. If you find that the pressure of each membrane element in the component is greater than 0.1Mpa to be immediately cleaned (cleaning is completed by the cleaning system). According to different pollution conditions, targeted treatment measures. Specific cleaning methods are detailed in the "reverse osmosis membrane chemical cleaning methods".
3: regular periodic inspection and testing of conductivity meter and the pressure gauge, so that it works normally and accurately.
4: regular periodic inspection of the electrical control system to ensure that the equipment runs normally.
5: regular periodic inspection of high-pressure pumps and RO pre-pump, according to the maintenance manual timely replacement of lubricating oil.
Three: shutdown protection
As a result of fluctuations in production, RO devices inevitably have to be often shut down, RO short-term or long-term shutdown must be taken to protect the measures, inappropriate treatment will lead to a decline in the performance of the membrane and can not be restored.
Short-term preservation of the ro system for less than 15d shutdown, can be used every 1 ~ 3d low-pressure flushing method to protect the ro device. Practice found that the water temperature of 20 ℃ or more, ro device in the water stored 3d will be odor and deterioration, a large number of bacterial reproduction. Therefore, it is recommended that the water temperature is higher than 20 ℃, every 2d or 1d low-pressure flushing, the water temperature is lower than 20 ℃, you can every 3d low-pressure flushing, each time after the flushing need to close the reverse osmosis device on all import and export valves.
Long-term out-of-service protection for more than 15d out-of-service system, which must be used to protect the liquid (biocide) into the reverse osmosis device for protection. Commonly used biocide formula (composite membrane) for formaldehyde 10% (mass fraction), isothiazolinone 20mg / l, sodium bisulfite 1% (mass fraction).
Previously, the commonly used biocide formula is formaldehyde, because it has the advantages of cheap, easy to obtain, but recently, for environmental protection and human health considerations, isothiazolinone is gradually being emphasized, but its application in reverse osmosis protection has not been reported.
Chemical cleaning
In normal operating conditions, reverse osmosis membrane may also be inorganic scale, colloids, microorganisms, metal oxides and other contaminants, the deposition of these substances on the membrane surface will cause a decline in the reverse osmosis device or desalination rate drop, the differential pressure rises, and even the membrane caused by the irrecoverable damage, so in order to restore the good performance of the water permeability and salinity, the need to carry out chemical cleaning of the membrane. Chemical cleaning.
Generally 3 to 12 months cleaning, if every month had to clean once, which means that should improve the ro pretreatment system, adjust the ro operating parameters. If 1 ~ 3 months need to be cleaned once, you need to improve the level of operation of the equipment, whether the need to improve the pretreatment system is more difficult to judge.