On-line cleaning reverse osmosis system and water purification equipment

Abstract

The utility model relates to an on-line cleaning reverse osmosis system and water purification equipment. The on-line cleaning reverse osmosis system comprises a controller, a measuring device, and a cleaning device, a booster pump, a reverse osmosis membrane and a wastewater electromagnetic valve which are sequentially connected through a pipeline, the cleaning device comprises a plurality of cleaning units which are arranged in parallel; each cleaning unit comprises a liquid inlet electromagnetic valve, a cleaning liquid tank and a liquid outlet electromagnetic valve which are sequentially connected through a pipeline, the liquid outlet electromagnetic valve is connected with the booster pump through a pipeline, and the liquid inlet electromagnetic valve is connected with the wastewater electromagnetic valve through a pipeline; each cleaning fluid tank comprises one cleaning fluid, and one cleaning fluid is used for cleaning the reverse osmosis membrane corresponding to one pollution type; the controller is electrically connected with the measuring device and the cleaning device. In the embodiment of the invention, the pollution type of the reverse osmosis membrane is determined according to the measuring device, and the cleaning unit of the corresponding pollution type is started through the controller to clean the reverse osmosis membrane, so that the full-automatic online cleaning of the reverse osmosis system is realized, and the cleaning efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of water treatment, in particular to an online cleaning reverse osmosis system and water purification equipment. Background Art

[0002] With the widespread application of water purification equipment in the water treatment industry, reverse osmosis membranes have gradually been taken seriously. The cost of reverse osmosis membranes is one of the issues that consumers are most concerned about. Good maintenance helps to extend the service life of reverse osmosis membranes. For large reverse osmosis systems, on-site maintenance is required at regular intervals, and the reverse osmosis membranes must be cleaned during maintenance. Before cleaning the reverse osmosis membrane, it is necessary to take water samples for analysis in advance, determine the type of pollutants based on the nature of the pollutants in the water samples, and then configure the corresponding chemical reagents based on the specific type of pollutants. Then, bring the chemical reagents to the site to maintain the reverse osmosis membrane. The entire maintenance process is time-consuming and inefficient, making the maintenance work of cleaning the reverse osmosis membrane very complicated. Utility Model Content

[0003] In order to solve the above technical problems, the present application provides an online cleaning reverse osmosis system and a water purification device.

[0004] In a first aspect, an embodiment of the present application discloses an online cleaning reverse osmosis system, including a controller, a measuring device, and a cleaning device, a booster pump, a reverse osmosis membrane, and a wastewater solenoid valve connected in sequence by pipelines;

[0005] The cleaning device includes a plurality of cleaning units arranged in parallel; each cleaning unit includes a liquid inlet solenoid valve, a cleaning liquid tank and a liquid outlet solenoid valve connected in sequence by pipelines, and the liquid outlet solenoid valve is connected to the booster pump pipeline, and the liquid inlet solenoid valve is connected to the wastewater solenoid valve pipeline; each cleaning liquid tank includes a cleaning liquid, and the cleaning liquid is used to clean the reverse osmosis membrane corresponding to a type of contamination;

[0006] The controller is electrically connected to the measuring device and the cleaning device respectively; the controller is used to determine the pollution type of the reverse osmosis membrane according to the measuring device, and then start the cleaning unit corresponding to the pollution type to clean the reverse osmosis membrane.

[0007] In some possible embodiments,

[0008] The measuring device includes a pre-membrane pressure gauge and two total dissolved solids detectors;

[0009] The pre-membrane pressure gauge is located between the booster pump and the reverse osmosis membrane. The pressure gauge is used to obtain the pre-membrane pressure of the raw water passing through the reverse osmosis membrane.

[0010] Two total dissolved solid detectors are located in front of the reverse osmosis membrane and behind the reverse osmosis membrane respectively. The two total dissolved solid detectors are used to detect the desalination rate of raw water before and after passing through the reverse osmosis membrane;

[0011] The controller is used to determine the fouling type of the reverse osmosis membrane by comparing the pressure before the membrane with the initial pressure before the membrane and comparing the salt rejection rate with the initial salt rejection rate.

[0012] In some possible embodiments,

[0013] The pollution type includes one of inorganic pollution, organic pollution and biological pollution;

[0014] When the pressure before the membrane is greater than the initial pressure before the membrane and the desalination rate is less than the initial desalination rate, the pollution type is inorganic pollution;

[0015] When the pressure before the membrane is greater than the initial pressure before the membrane and the desalination rate is greater than the initial desalination rate, the pollution type is organic pollution;

[0016] When the pressure before the membrane is greater than the initial pressure before the membrane and the desalination rate is equal to the initial desalination rate, the pollution type is biological pollution.

[0017] In some possible embodiments,

[0018] The cleaning unit includes one of a metal oxide pollution cleaning unit, an inorganic pollution cleaning unit and a biological pollution cleaning unit;

[0019] The cleaning liquid in the cleaning liquid tank in the metal oxide pollution cleaning unit is a 2% citric acid solution;

[0020] The cleaning liquid in the cleaning liquid tank in the inorganic pollution cleaning unit is a 0.5% hydrochloric acid solution;

[0021] The cleaning liquid in the cleaning liquid tank in the biological contamination cleaning unit is a 0.1% sodium hydroxide and sodium dodecylbenzene sulfonate solution.

[0022] In some possible embodiments,

[0023] A heater is arranged in the cleaning liquid tank; the heater is used for heating the cleaning liquid in the cleaning liquid tank.

[0024] In some possible embodiments,

[0025] A liquid level float is arranged in the cleaning liquid tank; the liquid level float is used to monitor the liquid level height in the cleaning liquid tank.

[0026] In some possible embodiments,

[0027] The cleaning device also includes a flow meter, which is arranged in a pipeline between the liquid outlet solenoid valve and the booster pump; the flow meter is electrically connected to the controller.

[0028] In some possible embodiments,

[0029] The online cleaning reverse osmosis system also includes a raw water detector;

[0030] The raw water detector is located before the booster pump; the raw water detector is used to detect the properties of the raw water before passing through the reverse osmosis membrane and determine the type of pollution.

[0031] In some possible embodiments,

[0032] The online cleaning reverse osmosis system also includes online detection equipment;

[0033] The online detection device is connected to the reverse osmosis membrane pipeline, and the online detection device is electrically connected to the controller; the online detection device is used to detect the reverse osmosis membrane to determine the cleaning effect.

[0034] In a second aspect, an embodiment of the present application discloses a water purification device, including a water purification pipeline and any one of the above-mentioned online cleaning reverse osmosis systems;

[0035] The water purification pipeline includes a water inlet solenoid valve, a booster pump, a reverse osmosis membrane and a water outlet solenoid valve which are sequentially connected by pipelines;

[0036] The reverse osmosis membrane is respectively connected with the booster pump, the wastewater solenoid valve and the outlet water solenoid valve pipelines.

[0037] The technical solution provided by the embodiment of the present application has the following technical effects:

[0038] The online cleaning reverse osmosis system of the embodiment of the present application includes a controller, a measuring device, and a cleaning device, a booster pump, a reverse osmosis membrane, and a wastewater solenoid valve connected in sequence by pipelines; the cleaning device includes a plurality of cleaning units arranged in parallel; each cleaning unit includes a liquid inlet solenoid valve, a cleaning liquid tank, and a liquid outlet solenoid valve connected in sequence by pipelines, and the liquid outlet solenoid valve is connected to the booster pump pipeline, and the liquid inlet solenoid valve is connected to the wastewater solenoid valve pipeline; each cleaning liquid tank includes a cleaning liquid, and the cleaning liquid is used to clean the reverse osmosis membrane corresponding to a type of contamination; the controller is electrically connected to the measuring device and the cleaning device, respectively. In the embodiment of the present application, the contamination type of the reverse osmosis membrane is determined according to the measuring device, and the cleaning unit corresponding to the contamination type is started by the controller to clean the reverse osmosis membrane, thereby realizing a fully automatic online cleaning reverse osmosis system and improving the cleaning efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions and advantages in the embodiments of the present application or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0040] Figure 1 This is a schematic diagram of an online reverse osmosis system proposed in the embodiment of the present application. Figure 1 ;

[0041] Figure 2 This is a schematic diagram of an online reverse osmosis system proposed in the embodiment of the present application. Figure 2 ;

[0042] Figure 3 This is a schematic diagram of an online reverse osmosis system proposed in the embodiment of the present application. Figure 3 ;

[0043] Figure 4 This is a schematic diagram of an online reverse osmosis system proposed in the embodiment of the present application. Figure 4 ;

[0044] Figure 5 It is a schematic diagram of a water purification device proposed in an embodiment of the present application. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0046] It should be noted that the "one embodiment" or "embodiment" referred to in the specification of the embodiment of the present application refers to a specific feature, structure or characteristic that can be included in at least one implementation of the present application. It should be understood that in the specification and claims of the embodiment of the present application and the above-mentioned drawings, the orientation or position relationship indicated by the terms "upper", "lower", "top", "bottom", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. The terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features. Moreover, the terms "first", "second", etc. are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described here can be implemented in an order other than those illustrated or described here. In addition, in the description of the present embodiment, unless otherwise specified, "plurality" means two or more. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system or product including a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0047] It should be understood that when a device or component is referred to as "on ...", "adjacent to ...", "connected to" other devices or components, it can be directly on, adjacent to, connected to other devices or components, or there can be intervening devices or components. On the contrary, when a device or component is referred to as "directly on ...", "directly adjacent to ...", "directly connected to" other devices or components, there is no intervening device or component. It should be understood that although the terms first, second, third, etc. can be used to describe various components, areas, layers and / or parts, these components, areas, layers and / or parts should not be limited by these terms. These terms are only used to distinguish one component, area, layer or part from another component, area, layer or part. Therefore, without departing from the teachings of the present application, the first component, area, layer or part discussed below can be expressed as the second component, area, layer or part. And when the second component, area, layer or part is discussed, it does not mean that the present application necessarily has the first component, area, layer or part.

[0048] In order to make the purpose, technical solution and advantages disclosed in the embodiments of the present application more clearly understood, the embodiments of the present application are further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the embodiments of the present application and are not used to limit the embodiments of the present application.

[0049] The embodiment of the present application provides an online cleaning reverse osmosis system, which is part of a large-scale water purification device and is used to clean the reverse osmosis membrane in the large-scale water purification device. Since the raw water carries pollutants, after multiple purifications of the raw water, pollutants remain on the reverse osmosis membrane, causing its purification performance to weaken. When the types of pollutants in the raw water are different, the pollution type of the reverse osmosis membrane will also be different; for different types of pollution, different cleaning solutions need to be selected for cleaning. The traditional method uses an offline mode to clean the reverse osmosis system, which requires extracting water samples in advance to determine the type of pollution, and then preparing corresponding chemical reagents to clean the reverse osmosis membrane; the present application adopts an online cleaning mode, and the system itself is provided with a water sample testing device for determining the type of pollution and a variety of cleaning solutions corresponding to different types of pollution, which can quickly clean the reverse osmosis membrane online. The online cleaning reverse osmosis system is generally used in larger usage scenarios, such as equipment rooms such as schools, hospitals, and office buildings.

[0050] Figure 1 This is a schematic diagram of an online reverse osmosis system proposed in the embodiment of the present application. Figure 1 ,like Figure 1 As shown, the online cleaning reverse osmosis system includes a controller, a measuring device 1, and a cleaning device 2, a booster pump 3, a reverse osmosis membrane 4, and a wastewater solenoid valve 5 connected in sequence by pipelines. The cleaning device 2 includes a plurality of cleaning units 21 arranged in parallel. Each cleaning unit 21 includes a liquid inlet solenoid valve 211, a cleaning liquid tank 212, and a liquid outlet solenoid valve 213 connected in sequence by pipelines, and the liquid outlet solenoid valve 213 is connected to the booster pump 3 by pipeline, and the liquid inlet solenoid valve 211 is connected to the wastewater solenoid valve 5 by pipeline. Each cleaning unit 21 and the reverse osmosis membrane 44 form a circulation system connected by pipelines. Considering the diversity of pollution types, each cleaning unit 21 should respond to a pollution type, and the cleaning liquid tank 212 in each cleaning unit 21 contains a cleaning liquid, and each cleaning liquid is used to clean the reverse osmosis membrane 4 corresponding to a pollution type. The controller is electrically connected to the measuring device 1 and the cleaning device 2 respectively, and the measuring device 1 determines the pollution type of the reverse osmosis membrane 44. The controller starts the cleaning unit 21 corresponding to the pollution type to clean the reverse osmosis membrane 4 according to the pollution type.

[0051] Figure 2 This is a schematic diagram of an online reverse osmosis system proposed in the embodiment of the present application. Figure 2 ,like Figure 2As shown, a raw water detector 6 is also provided before the booster pump 3. The raw water detector 6 detects the properties of the raw water before it passes through the reverse osmosis membrane 4, thereby determining the cause of the pollution of the reverse osmosis membrane 4 and also helping to determine the type of pollution of the reverse osmosis membrane 4. The raw water detector 6 can detect the hardness, chemical oxygen demand (COD), total organic carbon (TOC), silt density index (SDI) and other indicators of the raw water. Among them, COD is an important organic pollution parameter that can be measured quickly; TOC can be used as an indicator for evaluating organic pollution in water quality. The higher the TOC value, the higher the organic content in the water; SDI represents the content of particles, colloids and other objects in the water that can block various water purification equipment. The present application determines the pollutants present in the raw water through the raw water detector 6. These pollutants may cause the reverse osmosis membrane 4 to be contaminated, but it is not possible to determine whether the reverse osmosis membrane 4 is contaminated only through the raw water detector 6, so a measuring device 1 is set in the system; the measuring device 1 determines the type of pollution, and the raw water detector 6 can further determine the accuracy of the measurement result of the measuring device 1 for the detection result of the properties of the raw water. The cooperation of the two improves the accuracy of the pollution type judgment result.

[0052] In the embodiment of the present application, the contamination type of the reverse osmosis membrane 4 is determined by measuring the pre-membrane pressure, desalination rate and other parameters of the raw water before and after passing through the reverse osmosis membrane 4 through the measuring device 1. Therefore, a pre-membrane pressure gauge 11 and two total dissolved solids detectors 12 are set in the measuring device 1. Figure 3 This is a schematic diagram of an online reverse osmosis system proposed in the embodiment of the present application. Figure 3 ,like Figure 3 As shown, the pre-membrane pressure gauge 11 is located between the booster pump 3 and the reverse osmosis membrane 4. The pre-membrane pressure gauge 11 is used to obtain the pre-membrane pressure P of the raw water before passing through the reverse osmosis membrane 4. n The two total dissolved solid detectors 12 are respectively located in front of the reverse osmosis membrane 4 and behind the reverse osmosis membrane 4. The two total dissolved solid detectors 12 are respectively used to detect the total dissolved solid value (TDS value) in the raw water before and after passing through the reverse osmosis membrane 4. The desalination rate K of the raw water before and after passing through the reverse osmosis membrane 4 can be determined by the difference between the two TDS values. n ; The TDS value before passing through the reverse osmosis membrane 4 is T 1 , the TDS value before passing through the reverse osmosis membrane 4 is T 2 , then the desalination rate K n =(T 1 -T 2 ) / T 1 . Preset initial membrane front pressure P 0 and initial desalination rate K 0 (corresponding to the initial membrane front pressure P 0 and initial desalination rate K 0 The reverse osmosis membrane 4 is in an uncontaminated state), the controller obtains the pressure P before the membrane from the measuring device 1n and the salt rejection rate K n , and the pressure before the membrane P n and the initial membrane front pressure P 0 For comparison and the salt rejection rate K n and initial desalination rate K 0 A comparison is made, and the pollution type of the reverse osmosis membrane 4 can be determined based on the comparison result.

[0053] In the embodiment of the present application, the controller compares the pressure P before the membrane. n and the initial membrane front pressure P 0 And the salt rejection rate K n and initial desalination rate K 0 The types of pollution determined include inorganic pollution, organic pollution and biological pollution. n Greater than the initial membrane pressure P 0 , desalination rate K n Less than the initial desalination rate K 0 When the pressure before the membrane increases significantly and the increase value exceeds the preset value (preset according to the actual situation when designing the system), there is a high possibility that inorganic scaling exists in the reverse osmosis membrane 4; when the rejection rate decreases significantly and the decrease value exceeds the preset value (preset according to the actual situation when designing the system), there is a high possibility that metal oxide pollution exists in the reverse osmosis membrane 4. When the pressure before the membrane P n Greater than the initial membrane pressure P 0 , desalination rate K n Greater than the initial desalination rate K 0 When the pressure before the membrane is P n Greater than the initial membrane pressure P 0 , desalination rate K n Approximately equal to the initial desalination rate K 0 , the pollution type is biological pollution.

[0054] In the embodiment of the present application, after the pollution type is determined, the corresponding cleaning liquid is required to clean the reaction membrane. In view of different pollution types, a plurality of cleaning units placed in parallel are set in the cleaning device 2, and the plurality of cleaning units include a metal oxide pollution cleaning unit 21, an inorganic pollution cleaning unit 21, and a biological pollution cleaning unit 21. The cleaning liquid in the cleaning liquid tank 212 of the metal oxide pollution cleaning unit 21 is a 2% citric acid solution; the cleaning liquid in the cleaning liquid tank 212 of the inorganic pollution cleaning unit 21 is a 0.5% hydrochloric acid solution; the cleaning liquid in the cleaning liquid tank 212 of the biological pollution cleaning unit 21 is a 0.1% sodium hydroxide and sodium dodecylbenzene sulfonate solution. Figure 4 This is a schematic diagram of an online reverse osmosis system proposed in the embodiment of the present application. Figure 4 ,like Figure 4As shown, in order to improve the cleaning effect of the cleaning liquid, it is necessary to keep the cleaning liquid at a certain temperature (generally 25 degrees Celsius), so a temperature measuring device 2121 and a heater 2122 are set in the cleaning liquid tank 212; when the temperature measuring device 2121 detects that the temperature of the cleaning liquid has not reached the required temperature, the heater 2122 is started until the temperature of the cleaning liquid reaches the required temperature. At the same time, a liquid level float 2123 is also set in the cleaning liquid tank 212, and the liquid level float 2123 is used to monitor the liquid level height in the cleaning liquid tank 212, and the liquid level float 2123 includes a high liquid level, a middle liquid level and a low liquid level; when the liquid level of the cleaning liquid is lower than the low liquid level, the system will issue an instruction to add cleaning liquid until the cleaning liquid reaches the preset liquid level.

[0055] In some possible embodiments, the cleaning device 2 further includes a flow meter. The flow meter is disposed in a pipeline between the liquid outlet solenoid valve 213 and the booster pump 3, and the flow meter is electrically connected to the controller. Measuring the flow rate of the cleaning liquid in the pipeline by the flow meter is helpful to determine the cleaning efficiency of the reaction membrane.

[0056] In some possible embodiments, the online cleaning reverse osmosis system further comprises an online detection device. The online detection device is connected to the reverse osmosis membrane 4 pipeline, and the online detection device is electrically connected to the controller. By detecting the reverse osmosis membrane 4 with the online detection device, the cleaning effect of the reverse osmosis membrane 4 can be determined.

[0057] The embodiment of the present application also discloses a water purification device, including a water purification pipeline and an online cleaning reverse osmosis system. Figure 5 is a schematic diagram of a water purification device proposed in an embodiment of the present application, such as Figure 5 As shown, the water purification pipeline includes an inlet electromagnetic valve 7, a booster pump 3, a reverse osmosis membrane 4 and an outlet electromagnetic valve 8 which are sequentially connected by pipelines. Moreover, the reverse osmosis membrane 4 is respectively connected to the booster pump 3, the wastewater electromagnetic valve 5 and the outlet electromagnetic valve 8 by pipelines.

[0058] In the embodiment of the present application, in the normal water treatment process, the water inlet solenoid valve 7 is turned on, the booster pump 3 is turned on, the water outlet solenoid valve 8 is turned on, and the other valves in the water purification equipment are all in a closed state. Among them, the wastewater solenoid valve 5 is in a normally closed state, and the micropores in the wastewater solenoid valve 5 itself allow the wastewater solenoid valve 5 to flow out a set flow rate when it is closed. Through the water treatment process, the raw water carrying pollutants can be purified into cleaner water after being filtered by the reverse osmosis membrane 4 to meet specific needs.

[0059] In the embodiment of the present application, during the online hydraulic flushing process, the water inlet solenoid valve 7, the booster pump 3, and the wastewater solenoid valve 5 are all opened, and the other valves are closed. Through the online hydraulic flushing process, the water entering from the raw water inlet passes through the reverse osmosis membrane 4 and is discharged through the wastewater outlet. At this time, the water entering from the raw water inlet can clean the reverse osmosis membrane 4 to a certain extent.

[0060] In the embodiment of the present application, the reverse osmosis membrane 4 is deeply cleaned by an online cleaning reverse osmosis system. The system first determines the type of pollution based on the data measured by the measuring device 1, and then detects whether the cleaning liquid in the cleaning unit 21 corresponding to the detected type of pollution has reached the preset temperature. If the preset temperature has not been reached, the heater 2122 needs to be started until the temperature reaches the preset temperature. At the same time, the system also needs to detect whether the cleaning liquid in the cleaning liquid tank 212 has reached the preset liquid level. If the preset liquid level has not been reached, the system needs to issue an instruction to add cleaning liquid. After the cleaning liquid is added to the preset liquid level, the booster pump 3, the liquid inlet solenoid valve 211, the liquid outlet solenoid valve 213 and the wastewater solenoid valve 5 are turned on. At this time, the cleaning liquid can be circulated in the pipeline connected to the cleaning unit and the wastewater solenoid valve to clean the reverse osmosis membrane 4. When the cleaning time reaches the preset time, the cleaning is stopped. When the pollution type is metal oxide pollution, the cleaning liquid in the cleaning unit 21 that plays the role of cleaning the reverse osmosis membrane is a 2% citric acid solution; when the pollution type is inorganic pollution, the cleaning liquid in the cleaning unit 21 that plays the role of cleaning the reverse osmosis membrane is a 0.5% hydrochloric acid solution; when the pollution type is biological pollution, the cleaning liquid in the cleaning unit 21 that plays the role of cleaning the reverse osmosis membrane is a 0.1% sodium hydroxide and sodium dodecylbenzene sulfonate solution. The above solution ratios are configured by the system based on the quality of the raw water that needs to be treated before the system is designed.

[0061] The online cleaning reverse osmosis system in the embodiment of the present application can identify the pollution type of the water system online, and select the chemical reagents prepared in advance to automatically clean the reverse osmosis membrane according to the different pollution types. The whole system is fully automatically controlled and unattended, which greatly improves the work efficiency.

[0062] It should be noted that the above-mentioned sequence of the embodiments of the present application is for description only and does not represent the advantages and disadvantages of the embodiments. The above-mentioned specific embodiments of this specification are described. Other embodiments are within the scope of the attached claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0063] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0064] A person skilled in the art will understand that all or part of the steps to implement the above embodiments may be accomplished by hardware or by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a disk or an optical disk, etc.

[0065] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An online cleaning reverse osmosis system, characterized in that: It includes a controller, a measuring device, and a cleaning device, a booster pump, a reverse osmosis membrane and a wastewater solenoid valve connected in sequence by pipelines; The cleaning device comprises a plurality of cleaning units arranged in parallel; each cleaning unit comprises a liquid inlet solenoid valve, a cleaning liquid tank and a liquid outlet solenoid valve connected in sequence by pipelines, and the liquid outlet solenoid valve is connected to the booster pump pipeline, and the liquid inlet solenoid valve is connected to the wastewater solenoid valve pipeline; each cleaning liquid tank comprises a cleaning liquid, and the cleaning liquid is used to clean the reverse osmosis membrane corresponding to a pollution type; The controller is electrically connected to the measuring device and the cleaning device respectively; The controller is used to determine the pollution type of the reverse osmosis membrane according to the measuring device, and then start the cleaning unit corresponding to the pollution type to clean the reverse osmosis membrane.

2. The online cleaning reverse osmosis system according to claim 1, characterized in that: The measuring device includes a pre-membrane pressure gauge and two total dissolved solids detectors; The pre-membrane pressure gauge is located between the booster pump and the reverse osmosis membrane, and the pressure gauge is used to obtain the pre-membrane pressure of the raw water passing through the reverse osmosis membrane; The two total dissolved solid detectors are respectively located in front of the reverse osmosis membrane and behind the reverse osmosis membrane, and the two total dissolved solid detectors are used to detect the desalination rate of the raw water before and after passing through the reverse osmosis membrane; The controller is used for determining the pollution type of the reverse osmosis membrane by comparing the pre-membrane pressure with the initial pre-membrane pressure and comparing the desalination rate with the initial desalination rate.

3. The online cleaning reverse osmosis system according to claim 2, characterized in that: The pollution type includes one of inorganic pollution, organic pollution and biological pollution; When the pre-membrane pressure is greater than the initial pre-membrane pressure and the desalination rate is less than the initial desalination rate, the pollution type is inorganic pollution; When the pre-membrane pressure is greater than the initial pre-membrane pressure and the desalination rate is greater than the initial desalination rate, the pollution type is organic pollution; When the pre-membrane pressure is greater than the initial pre-membrane pressure and the desalination rate is equal to the initial desalination rate, the pollution type is biological pollution.

4. The online cleaning reverse osmosis system according to claim 1, characterized in that: The cleaning unit includes one of a metal oxide pollution cleaning unit, an inorganic pollution cleaning unit and a biological pollution cleaning unit; The cleaning liquid in the cleaning liquid tank in the metal oxide pollution cleaning unit is a 2% citric acid solution; The cleaning liquid in the cleaning liquid tank in the inorganic pollution cleaning unit is a 0.5% hydrochloric acid solution; The cleaning liquid in the cleaning liquid tank in the biological contamination cleaning unit is a 0.1% sodium hydroxide and sodium dodecylbenzene sulfonate solution.

5. The online cleaning reverse osmosis system according to claim 1, characterized in that: A heater is arranged in the cleaning liquid tank; the heater is used to heat the cleaning liquid in the cleaning liquid tank.

6. The online cleaning reverse osmosis system according to claim 1, characterized in that: A liquid level float is arranged in the cleaning liquid tank; the liquid level float is used to monitor the liquid level height in the cleaning liquid tank.

7. The online cleaning reverse osmosis system according to claim 1, characterized in that: The cleaning device further comprises a flow meter, which is arranged in a pipeline between the liquid outlet solenoid valve and the booster pump; the flow meter is electrically connected to the controller.

8. The online cleaning reverse osmosis system according to claim 1, characterized in that: The online cleaning reverse osmosis system also includes a raw water detector; The raw water detector is located before the booster pump; the raw water detector is used to detect the properties of the raw water before passing through the reverse osmosis membrane and determine the pollution type.

9. The online cleaning reverse osmosis system according to claim 1, characterized in that: The online cleaning reverse osmosis system also includes an online detection device; The online detection device is connected to the reverse osmosis membrane pipeline, and the online detection device is electrically connected to the controller; the online detection device is used to detect the reverse osmosis membrane to determine the cleaning effect.

10. A water purification device, characterized in that: It comprises a clean water pipeline and an online cleaning reverse osmosis system as claimed in any one of claims 1 to 9; The water purification pipeline comprises a water inlet solenoid valve, a booster pump, a reverse osmosis membrane and a water outlet solenoid valve which are connected in sequence through pipelines; The reverse osmosis membrane is connected to the booster pump, the wastewater solenoid valve and the water outlet solenoid valve pipeline respectively.

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