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This post was last edited by adminzou on 2016-10-27 at 15:55. We know that pure water treatment systems mostly use reverse osmosis technology to purify water. What are the advantages of this technology compared to other methods? Why is it widely used and has received consistent positive reviews? Below, Sany Water Purification Technology will explain the features of reverse osmosis-based pure water treatment systems. Today, we will discuss with you the maintenance techniques and performance characteristics of reverse osmosis equipment! The key to ensuring that pure water production equipment operates properly over the long term is proper maintenance; the more careful the maintenance, the smoother the operation of the equipment. Therefore, it is important to avoid damaging the machine during its operation. Generally, the equipment used in pure water production plants is designed to operate fully automatically and is easy to use. However, to ensure consistent water output from the system over the long term and to extend its lifespan, it is necessary to follow proper maintenance procedures strictly. Pure water treatment equipment generally uses the state-of-the-art reverse osmosis membrane separation technology as its core method. This membrane separation technique offers high-efficiency filtering capabilities, and the quality of the water produced is ensured to meet all relevant regulatory standards. A reverse osmosis pure water treatment system generally includes a pretreatment system, a reverse osmosis unit, a post-treatment system, a cleaning system, and an electrical control system. A pretreatment system generally includes a raw water pump, dosing equipment, quartz sand filters, activated carbon filters, precision filters, etc. Its main function is to reduce the pollution index of the raw water as well as other impurities such as residual chlorine, so as to meet the requirements for water feed in reverse osmosis processes. A reverse osmosis system mainly consists of multi-stage high-pressure pumps, reverse osmosis membrane elements, membrane housings (pressure vessels), supports, and other components. Its main function is to remove impurities from water, so that the treated water meets the required standards for use. The post-treatment system is an additional component installed when reverse osmosis cannot meet the requirements for the output water. It mainly includes one or more of the following devices: anion exchange beds, cation exchange beds, mixed-bed reactors, sterilization units, ultrafiltration systems, etc. The cleaning system mainly consists of a cleaning water tank, a cleaning water pump, and a precision filter. When the reverse osmosis system becomes contaminated and the quality of the output water fails to meet the requirements, it is necessary to clean the reverse osmosis system to restore its efficiency. The electrical control system is used to ensure the proper operation of the entire reverse osmosis system. This includes dashboards, control panels, various electrical protections, electrical control cabinets, etc. Performance features of reverse osmosis pure water equipment: 1. It uses imported reverse osmosis membranes, which offer a high desalination rate, a long service life, and low operating costs. 2. A fully automatic preprocessing system is used to achieve unmanned operation. 3. High efficiency, low noise, stable and reliable. 4. Online water quality monitoring and control: monitor water quality changes in real time to ensure water quality safety. 5. Fully automatic electronic control system; a touch screen operation option is also available, ensuring easy use. 6. A personalized design tailored to local water quality, meeting all requirements comprehensively. 7. The equipment occupies a small area and requires little space. 8. The reverse osmosis system has a high degree of automation, resulting in minimal workload for operation and maintenance as well as equipment upkeep. 9. Water treatment relies solely on water pressure as the driving force, resulting in the lowest energy consumption among many treatment processes. 10. No large amounts of chemical agents or acid/alkali are required for regeneration; there is no discharge of chemical waste fluids, and no environmental pollution is caused. 11. Reverse osmosis can produce water on a continuous basis; the system is simple to operate, and the quality of the produced water remains stable. 12. Reverse osmosis is a physical process that takes place at room temperature, using a phase-change-free method to desalt and remove salts from saline water. The desalination efficiency of ultra-thin composite membrane elements can exceed 99.5%, and they are capable of removing colloids, organic substances, bacteria, viruses, and other contaminants from water simultaneously. Maintenance tips for reverse osmosis water purification systems: 1. The total flow rate of water entering the reverse osmosis system is controlled by the RO inlet control valve. If there is no change in the flow rate of water entering the reverse osmosis system, do not adjust the RO inlet control valve; it is strictly prohibited to open or close it completely. The RO concentrate discharge control valve is used to adjust the system’s recovery rate; if the recovery rate remains unchanged, do not touch this valve, and it is strictly prohibited to open or close it completely. II. The device must not remain shut down for long periods; it should operate for at least 2 hours each day. If shutdown is planned for more than 72 hours, the chemical cleaning system should be used to fill the components with 1% sodium bisulfate and 18% glycerin as a protective measure. III. Each time the reverse osmosis system is started up after shutdown, it should be flushed for 10 minutes under an inlet water pressure of 0.4 Mpa lower. IV. For operating pressure control, a pressure level as low as possible should be selected, provided that the water production volume and quality requirements are met; this helps to reduce the decline in the membrane’s water flux and lowers the frequency of membrane replacement. V. Operators should record the operating parameters every hour to monitor the performance of the pure water equipment and the quality of the water produced. The main recorded parameters should include: inlet water – pH value, conductivity, pressure, SDI, and water temperature. Produced water: conductivity, flow rate, pH value; concentrated water: flow rate, pressure, and inlet pressure for each stage. VI. When a high or low pressure alarm occurs in the reverse osmosis system, first check whether the opening degree of the manual valve between the safety filter and the high-pressure pump is too small; then check whether the RO feed water control valve and the concentrate discharge valve are functioning properly. After that, press the high/low pressure alarm reset button to restart the pure water production equipment. VII. For the control of inlet water temperature, the minimum temperature that still meets the requirements regarding the amount of produced water and water quality should be selected, based on the actual water consumption. This minimum temperature is the critical pressure value – the pressure below which the desalination efficiency drops significantly. By using this value as the inlet water temperature for that period, the decline in membrane performance can be reduced. VIII. Strictly control the quality of the water entering the system to ensure that it operates under conditions that meet the specified requirements for inlet water. If the water quality does not meet these standards, it can easily cause fouling of the reverse osmosis membranes, leading to rapid degradation of these components and significantly affecting the quality of the water output.