Winter reverse osmosis equipment is more than just shutdown. These measures must be taken. If you already know that RO is affected by environmental pollution or suspect that it is affected by environmental pollution, the system software must undergo reasonable chemical water treatment before deactivation or maintenance (first non-air oxidation and sterilization, then alkaline, then acid-base, and finally alkaline). Within 10 hours after
shutdown, be sure to adopt the following safeguards.
The main operating procedures are as follows:
Category 1: Reverse osmosis device machinery and equipment stop working in the short term
①Clean the reverse osmosis system with ro reverse osmosis product water, and pay attention to completely clearing the gas from the system;
②When high-pressure containers and related pipelines are filled with water, close the relevant gate valve to avoid the gas login system;
③Clean the reverse osmosis system as described above every 5 days.
Second: Reverse osmosis device machinery and equipment stop working in the short term
Clean with the RO system software water supply pump with low voltage (0.2-0.3Mpa, try to keep the water-producing side not causing obvious permeability) for 15-30 minutes, and preparatory treatment agents should not be added during the period. It is recommended that the temperature of the cleaning water be 20-25℃ or low utilization rate every 48 hours (rated utilization rate is about 50%) operate for 2-4 hours.
Note: The above two short-term safeguard measures, if conditions are available on the spot, it is recommended to adopt the second short-term safeguard measures.
has been deactivated for about 30 days in reverse osmosis system.
already knows that membrane contamination or suspicion of environmental contamination of membrane components must first undergo reasonable chemical water treatment (first non-air oxidation and sterilization, then alkaline, then acid-base, and finally alkaline). Within 10 hours after cleaning, be sure to implement safeguards as soon as possible to reduce daily maintenance during parking.
① Filled with cold water tank RO water production and desalination water.
② Add 1wt20% anhydrous sodium sulfite wt% vaseline to the water tank cleaning and mix.
③ According to the cleaning RO, the aqueous solution is circulated in the equipment for 20-30 minutes, and the gas is driven away from the high-pressure container. It is recommended to use an overflow method to maintain the aqueous solution according to the circulation system so that it can RO and avoid residual gas in the system as much as possible.
④ Turn off all gate valves in the RO system software to prevent gas from touching the protective liquid, so that the protection is maintained in the system.
⑤ If the working temperature is less than 2000℃, the protective liquid should be replaced every 30 days; if the working temperature is higher than 200; ℃, the protective liquid should be replaced every 15 days, and the pH value should be checked every week. When the pH is less than 3, the protective liquid should be replaced regularly.
⑥ When stopping working, be sure to avoid freezing of the membrane system, and the minimum temperature is no less than 0℃. After meeting the above conditions, the smaller the storage working temperature, the better. It can ensure that the membrane element is stored in the membrane shell for one year. The membrane characteristics basically have little impact. However, it is still recommended that the RO system software stops operating for a long time and controls the temperature within one year. Before the reverse osmosis system is delivered again, use the low-voltage water supply and drainage cleaning system software for at least 1 hour, and then replace it with the high-pressure water supply and drainage cleaning system software for 15 minutes. Whether it is low voltage cleaning or high pressure cleaning, the comprehensive drain valve should be opened. Before the repair system is operating normally, it should be checked and determined that the residual chlorine of RO reverse osmosis water is 0.1ppm. If the water production rate is significantly lost after operation, the 0.1% NaOH organic chemical circulation system should be used in time to clean the aqueous solution.
⑧ Long-term storage RO system software can also be used to store membrane removal components. The specific steps and methods are detailed introduction to the storage and maintenance of industrial reverse osmosis membrane components.
Reverse osmosis device equipment that should be considered when stopping operation and maintenance in winter
(1) After standby, use the processed RO reverse osmosis power supply. Softening water treatment or product water cleaning system software;
(2) In order to maintain system stability, the membrane element must be kept humid;
(3) To avoid bacterial reproduction in high-pressure containers, cleaning should be done;
(4) If the membrane element is contaminated, system abnormality may occur, so chemical water treatment is required before storage, which can eliminate stains in the membrane element and control bacterial growth to a relatively small probability;
(5) Allowable temperature and pH ambient temperature when stored in high-pressure containers: 0~355:℃, pH range: 3-7.
(6) The preservation solution is made of acid-base anhydrous sodium sulfite (SBS) aqueous solution. The water used to prepare the storage material must be made to ensure that there are no residual free chlorine or other oxides.
reverse osmosis device system stops working during daily use
reverse osmosis device machinery and equipment shuts down for 0-48 hours: Refer to the normal shutdown procedure process, in order to avoid the breeding of microbial bacterial strains, clean
low voltage every 24 hours
short-term termination of reverse osmosis device machinery and equipment for 2-25 days
After shutting down, ensure that the high-pressure container is filled with high-pressure container R0 to produce pure water, and all water seepage is closed. The concentrated water inlet valve and water production valve to avoid drying membrane elements and breeding microbial strains;
❷When the ambient temperature exceeds 20℃, wash it repeatedly every 12 hours; when the ambient temperature is lower than 200 hours; ℃ wash it repeatedly every 24 hours;
❸Groundwater or high-microbial bacterial species contaminated water must be used to use R solvent with 1.0% anhydrous sodium sulfite to clean the reverse osmosis system. If such an aqueous solution is used to invade the film element at the same time, the effect will be better, and the continuous cleaning cycle time will increase accordingly;
❹When the system software shutdown period, the ambient temperature is maintained at 5℃~45℃ ultra-low temperature is beneficial to preserve the film element, but at the same time, the system software should be avoided freezing and cleaning.
·Continuous stop operation without thermal insulation standards
reverse osmosis device machinery and equipment for about 25 days
❶Refer to the normal shutdown procedure process, select the product water low voltage cleaning system software, and simultaneously perform chemical water treatment and disinfection treatment. After cleaning, use R0 water production low voltage cleaning system software until the concentrated water conductivity is consistent with the permeability;
uses ro reverse osmosis to produce pure water to prepare a protective liquid with 1.0% anhydrous sodium sulfite protection solution with 1.0% anhydrous sodium sulfite after cleaning. , use the membrane elements of the chemical water treatment system to clean the circulation system, remove the air in the high-pressure container, completely immerse the membrane elements in the protective liquid, avoid the membrane elements drying, and close the water valve all. Prevent the gas from entering and making the protective liquid invalid;
❸ Check the pH value of the protective liquid every week, and when the pH is lower than 3, the protective liquid should be replaced regularly;
❹ During the shutdown period, the ambient temperature is maintained at 5°C~45°C ultra-low temperature is beneficial to preserve the membrane elements, but at the same time, the system software should be avoided freezing and cleaning.
dry film components should be stored and stored in ice-cold and dry, without direct sunlight, and the working temperature should be less than 45℃.
If it is a wet film component, it is necessary to note that the storage working temperature should exceed 5℃ and be less than 45℃.
If the membrane element has been transported or stored at 0°C, when thawing, in order to avoid scratching of the valve plate, funds cannot be put into operation immediately. The room temperature should operate slowly. After "icing" is completely free of ice, then charge and operate
membrane components must be kept moist after pressure test. Even if the total number of the same packaging must be temporarily opened, it must not be destroyed until the packaging bag is applied; the
film element is best stored at ultra-low temperature of 5~10℃. When storing the natural environment with an ambient temperature exceeding 100℃, a region with better natural ventilation should be selected to prevent direct sunlight and the storage ambient temperature should not exceed 35℃;
If the film element is frozen and clean, physical damage will also occur, so thermal insulation measures should be taken, and there is no need to be frozen and clean;
When storing film elements, the packaging wooden box should not exceed 5 layers, and ensure that the carton box remains clean.
Other common problems of reverse osmosis device equipment
1. When the water inlet pipe breaks or breaks water
0 When the temperature is too low in winter, the water inlet of the reverse osmosis device machine is also prone to cracking. When the water inlet pipe breaks or stops, it is best not to use machinery and equipment, turn off the water inlet ball valve, and turn on the faucet when the water is water, so that the reverse osmosis device is working. When the indoor temperature is low,
is on the reverse osmosis device equipment in the room. The indoor temperature of the machine operation factory should not be lower than 0 degrees. Cold-proof measures should be taken when installed on outdoor equipment and pipelines. When the temperature drops below zero, it is necessary to prevent the cold of the machine.
3. When the water production rate decreases
Because the temperature in winter is low, the water production rate of water purification equipment decreases, increase the frequency of pretreatment equipment softener, increase the cleaning time, and often replace the filter element to reduce working pressure and enable the reverse osmosis device machinery and equipment to operate normally.
4. The machinery and equipment are not used or stopped operating for a long time
In winter, if the machinery and equipment are not used for a long time or stopped working, close the water inlet ball valve and discharge the water in pressure tank . When using it again, check whether there are any problems with the appearance of the equipment and run it again after verification.
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