1. The cleaning cycle of quartz sand and activated carbon filter is determined according to the raw water quality: the raw water is generally cleaned once a week (calculated as 7 days), and when the water quality of groundwater, river water and well water is poor, it is generally cleaned once every three days to ensure the timely removal of sediment, impurities and particles deposited in the preprocessor.

2. The pressure difference between the inlet and outlet of the security filter increases (> 0.06Mpa), so the filter element must be replaced to ensure the normal operation of the RO device. Suggestion: The filter element must be taken out for inspection and cleaning every three days. The replacement cycle of the filter element depends on the water quality, and it is usually replaced once every 0/5 days.

3. Avoid high-temperature contact with the softened resin tank, and use the regenerated liquid regeneration of resin every 15 days.

Second, the maintenance of reverse osmosis device:

1. Regularly record various operating parameters of the reverse osmosis device. Suggestion: Record the operating parameters of RO device every two hours.

2. With the increase of running time, sediment will be attached to the membrane surface, which will affect the water permeability, so it is necessary to clean the RO element regularly. If the pressure of each membrane element in the module is found to be greater than 0. 1Mpa, it should be cleaned immediately (cleaning is completed by the cleaning system). According to different pollution situations, take targeted control measures. See chemical cleaning method of reverse osmosis membrane for specific cleaning method.

3. Regularly check the conductivity meter and pressure gauge to make them work normally and accurately.

4. Check the electrical control system regularly to ensure the normal operation of the equipment.

5. Check the high-pressure pump and RO booster pump regularly, and change the lubricating oil in time according to the maintenance manual.

Three. Maintenance during equipment downtime:

For equipment downtime (national holidays, seasonal downtime, workshop maintenance, etc.). ), the maintenance points of reverse osmosis device (including electric control system and reverse osmosis membrane) are as follows:

1, the RO device is shut down for a short time (no more than three days), and it must be washed with security filter for 30 minutes every day, and the RO module must be filled with filtered water.

2. If the RO device is shut down for a long time (more than three days), the RO module should be filled with 1% formaldehyde solution, then all valves should be closed and checked once a month. Control the ambient temperature in summer to prevent mildew and prevent freezing in winter. If necessary, 10-20% glycerol can be added.

3. It is best to use reverse osmosis fresh water for preservation and chemical reagent products for formaldehyde.

4. When the reverse osmosis system composed of composite membrane is suspended for more than one week, the system should be soaked in 1% NaHSO3 solution to prevent bacteria from multiplying on the membrane surface.