Reverse osmosis membrane element testing equipment

Abstract

The utility model belongs to the technical field of reverse osmosis, and discloses reverse osmosis membrane element testing equipment, which comprises a medium-low pressure testing mechanism, a high pressure testing mechanism and a temperature control mechanism, a medium-low pressure pump set and a high pressure pump are respectively configured through the independent medium-low pressure testing mechanism and the high pressure testing mechanism, different testing pressure requirements of an FR membrane and an SW membrane are met, and the testing efficiency is improved. Frequent replacement of the device is avoided, and downtime is shortened; the closed-loop test loop design enables raw water to circularly flow, so that the water consumption cost is reduced; the interior of the double-core membrane shell is divided into two independent test cavities through a solid pipe fitting, fluid and pressure interference between membrane elements is avoided, the test flexibility is improved, and the replacement frequency and the disassembly and assembly time consumption are reduced; the medium-low pressure pump set and the high-pressure testing mechanism are selectively connected to realize quick switching, and meanwhile, a second double-core membrane shell is combined to support parallel testing, so that the equipment utilization rate is improved, and the testing period is shortened; the temperature control mechanism adjusts the water temperature in real time, simulates the actual working environment, and avoids test errors caused by temperature fluctuation.

Description

Technical Field

[0001] This utility model relates to the field of reverse osmosis technology, and in particular to a reverse osmosis membrane element testing device. Background Technology

[0002] Reverse osmosis (RO) membranes are an important technology for purifying water sources and removing harmful substances from water. They are widely used in seawater desalination, groundwater purification, and municipal water treatment. RO membranes can be divided into two main categories: FR membranes and SW membranes. FR membranes are typically used for medium- and low-pressure water treatment. They have stronger resistance to fouling when treating water sources with high levels of pollutants and can effectively remove dissolved salts, organic matter, bacteria, and other contaminants from the water. They are widely used in industrial wastewater treatment, municipal sewage reuse, and groundwater treatment, and can handle situations where the water source has a high concentration of suspended solids, dissolved substances, and impurities. SW membranes, on the other hand, are specifically designed for seawater desalination and are suitable for seawater sources in high-pressure environments. Especially in arid and water-scarce regions, SW membranes can effectively remove salt and other impurities from seawater to produce freshwater suitable for drinking or industrial use.

[0003] The performance of RO membrane elements directly affects the efficiency, effectiveness, and long-term operational stability of water treatment. Therefore, regular testing and evaluation of membrane elements are crucial to ensuring their performance and extending their service life. Typically, RO membrane element testing equipment uses single-core membrane housings, and the testing process involves three stages: disassembly / assembly, rinsing, and testing—a time-consuming and cumbersome process. Furthermore, different types of RO membranes have varying pressure requirements; replacing the pressure pump for each membrane element would waste a significant amount of time. Additionally, the testing environment has a substantial impact on membrane element performance. Utility Model Content

[0004] The purpose of this invention is to provide a reverse osmosis membrane element testing device that can effectively improve testing efficiency, reduce the time spent on membrane element replacement, disassembly, and rinsing, while meeting the testing pressure requirements of different types of membrane elements, improving the flexibility of membrane element testing, and reducing testing costs; it can also ensure that the water temperature remains stable within the set ideal range during the testing process, thereby improving the stability of the test results.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A reverse osmosis membrane element testing device for performance testing of FR membranes and / or SW membranes, wherein the reverse osmosis membrane element testing device includes:

[0007] The medium-low pressure testing mechanism includes a first water inlet component, a medium-low pressure pump group, and at least one first dual-core membrane housing, which are connected in series. The water outlet of the first dual-core membrane housing is connected to the water inlet of the first water inlet component to form a first closed-loop testing circuit. The first test raw water can circulate in the first closed-loop testing circuit to test the performance of the FR membrane.

[0008] The high-pressure testing mechanism includes a second water inlet assembly, a high-pressure pump, and at least one second dual-core membrane housing, which are connected in series. The outlet end of the second dual-core membrane housing is connected to the inlet end of the second water inlet assembly to form a second closed-loop testing circuit. The second test raw water can circulate in the second closed-loop testing circuit to test the performance of the SW membrane.

[0009] The output end of the medium-low pressure pump set can be selectively connected to the inlet end of the second dual-core membrane housing to facilitate switching between medium-low pressure and high pressure testing;

[0010] Both the first dual-core membrane shell and the second dual-core membrane shell are provided with solid tubing, which divides the first dual-core membrane shell and the second dual-core membrane shell into two independent test chambers, so that the membrane elements in the two independent test chambers can be tested simultaneously or individually.

[0011] A temperature control mechanism is connected to the first water inlet component and the second water inlet component respectively, and is used to monitor and adjust the water temperature in real time.

[0012] Furthermore, the medium- and low-pressure testing mechanism also includes a first water distributor and multiple first dual-core membrane housings, the multiple first dual-core membrane housings being connected in parallel, the inlet end of the first water distributor being connected to the outlet end of the medium- and low-pressure pump set, and its outlet end being connected to the inlet end of the multiple first dual-core membrane housings; and / or

[0013] The high-pressure testing mechanism also includes a second water distributor and multiple second dual-core membrane shells connected in parallel. The inlet end of the second water distributor is connected to the outlet end of the high-pressure pump, and its outlet end is connected to the inlet end of the multiple second dual-core membrane shells.

[0014] Furthermore, the reverse osmosis membrane element testing equipment also includes multiple conductivity meters, which are respectively installed on the product water channel of each of the independent testing chambers.

[0015] Furthermore, the reverse osmosis membrane element testing equipment also includes a plurality of first electric valves, which are respectively located on the permeate channel and concentrate channel of each of the independent test chambers.

[0016] Furthermore, the reverse osmosis membrane element testing equipment also includes flow control valves, which are respectively located at the inlet ends of the first inlet component and the second inlet component.

[0017] Furthermore, the medium-low pressure pump group includes a first pressure pump, a second pressure pump, and a second electric valve. The first pressure pump and the second pressure pump are connected in parallel, and their output end is connected to the water inlet end of the first dual-core membrane housing. The second pressure pump can be selectively connected to the water inlet end of the second dual-core membrane housing through the second electric valve.

[0018] Furthermore, both the medium- and low-pressure pump group and the high-pressure pump are equipped with pressure frequency converters, which can adjust the output water pressure of the medium- and low-pressure pump group and the high-pressure pump step by step.

[0019] Furthermore, the first water inlet assembly includes a first raw water tank, a first water supply pump, and a first filter, which are connected in series. The outlet of the first filter is connected to the inlet of the first dual-core membrane housing, and the outlet of the first dual-core membrane housing is connected to the inlet of the first raw water tank. The second water inlet assembly includes a second raw water tank, a second water supply pump, and a second filter, which are connected in series. The outlet of the second filter is connected to the inlet of the second dual-core membrane housing, and the outlet of the second dual-core membrane housing is connected to the inlet of the second raw water tank.

[0020] Furthermore, the temperature control mechanism includes a heat exchanger and multiple temperature sensors. The first water inlet assembly and the second water inlet assembly are connected to the heat exchanger. The heat exchanger can adjust the water temperature in the first water inlet assembly and the second water inlet assembly. The multiple temperature sensors are respectively installed on the first water inlet assembly and the second water inlet assembly and are electrically connected to the heat exchanger. The heat exchanger can adjust the degree of heat exchange according to the water temperature results monitored in real time by the temperature sensors.

[0021] Furthermore, the solid tubular fitting is characterized by being made of corrosion-resistant and pressure-resistant materials.

[0022] The beneficial effects of this utility model are:

[0023] This invention provides a reverse osmosis membrane element testing device, including a low-pressure testing mechanism, a high-pressure testing mechanism, and a temperature control mechanism. The low-pressure testing mechanism includes a first inlet water assembly, a low-pressure pump group, and at least one first dual-core membrane housing. The high-pressure testing mechanism includes a second inlet water assembly, a high-pressure pump, and at least one second dual-core membrane housing. By designing the low-pressure and high-pressure testing mechanisms as independent closed-loop testing circuits, and with the independent configuration of the low-pressure and high-pressure pump groups, the device can adapt to the testing pressure requirements of FR and SW membranes respectively. This allows different types of membrane elements to be tested simultaneously or quickly switched, avoiding frequent replacement of testing devices and reducing downtime during equipment operation. The closed-loop design allows the test raw water to circulate, reducing raw water consumption during testing, lowering water costs, and avoiding resource waste. By dividing the interiors of the first and second dual-core membrane housings into two independent testing chambers using solid tubing, the device avoids... The fluid and pressure interference between membrane elements within each independent test chamber reduces the frequency of membrane element replacement and the time spent on disassembly and assembly. The design, which allows simultaneous testing of two membrane elements or individual testing of a single membrane element, increases the flexibility of parallel dual-chamber testing. The selective connection design between the low-pressure pump group and the high-pressure testing mechanism allows for flexible and selective connection of the outputs of the low-pressure pump group and the high-pressure pump to different test circuits, enabling rapid switching from low-pressure to high-pressure testing. In conjunction with the second dual-core membrane housing, the low-pressure pump group and the high-pressure pump can be connected to the two independent test chambers of the second dual-core membrane housing, enabling simultaneous testing of different types of membrane elements, effectively improving equipment utilization, achieving multi-task parallel testing, and significantly shortening the overall testing cycle. The temperature control mechanism monitors the water temperature of the inlet component in real time and adjusts it to the ideal range, helping to simulate the temperature conditions in the actual working environment of the membrane element and avoiding test errors caused by temperature fluctuations. Attached Figure Description

[0024] Figure 1 This is a flowchart of the reverse osmosis membrane element testing equipment in this utility model;

[0025] Figure 2 This is a schematic diagram of the structure of the first dual-core membrane shell in this utility model.

[0026] In the picture:

[0027] 1. Medium and low pressure pump set; 2. First dual-core membrane housing; 3. First water distributor; 4. First raw water tank; 5. First feed water pump; 6. First filter; 7. High pressure pump; 8. Second dual-core membrane housing; 9. Second water distributor; 10. Second raw water tank; 11. Second feed water pump; 12. Second filter; 13. First electric valve; 14. Temperature control mechanism; 15. Solid pipe fittings; 16. Product water channel; 17. Concentrate water channel; 18. Cleaning water tank; 19. Cleaning water feed pump; 20. Cleaning water filter. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0029] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0031] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0032] Please refer to Figures 1 to 2As shown, this utility model provides a reverse osmosis membrane element testing device, which can effectively improve testing efficiency, reduce the time for membrane element replacement, disassembly, and flushing, while meeting the testing pressure requirements of different types of membrane elements, improving the flexibility of membrane element testing, and reducing testing costs; it can ensure that the water temperature remains stable within the set ideal range during the testing process, improving the stability of the test results. The reverse osmosis membrane element testing device is used for performance testing of FR membranes and / or SW membranes. The device includes a low-pressure testing mechanism, a high-pressure testing mechanism, and a temperature control mechanism 14. The low-pressure testing mechanism includes a first inlet water component, a low-pressure pump group 1, and at least one first dual-core membrane housing 2, connected in series. The outlet end of the first dual-core membrane housing 2 is connected to the inlet end of the first inlet water component, forming a first closed-loop testing circuit. The first test raw water can circulate in the first closed-loop testing circuit for testing FR membrane performance. The high-pressure testing mechanism includes a second inlet water component, a high-pressure pump 7, and at least one second dual-core membrane housing 8, connected in series. The outlet water of the second dual-core membrane housing 8... The first dual-core membrane housing 2 and the second dual-core membrane housing 8 are connected to the inlet end of the first dual-core membrane housing 2 and the second dual-core membrane housing 8 to form a second closed-loop test circuit. The second test raw water can circulate in the second closed-loop test circuit to test the performance of the SW membrane. The output end of the medium-low pressure pump group 1 can be selectively connected to the inlet end of the second dual-core membrane housing 8 to facilitate switching between medium-low pressure and high pressure tests. The first dual-core membrane housing 2 and the second dual-core membrane housing 8 are each provided with a solid tube 15. The solid tube 15 divides the first dual-core membrane housing 2 and the second dual-core membrane housing 8 into two independent test chambers, so that the membrane elements in the two independent test chambers can be tested simultaneously or individually. The temperature control mechanism 14 is connected to the first inlet assembly and the second inlet assembly respectively to monitor and adjust the water temperature in real time.

[0033] FR membranes are typically used for medium- and low-pressure water treatment. They have stronger anti-fouling capabilities when treating water sources with high levels of pollutants, and can effectively remove dissolved salts, organic matter, bacteria, and other pollutants from the water. They are widely used in industrial wastewater treatment, urban sewage reuse, and groundwater treatment, and can handle situations where there are many suspended solids, dissolved substances, and impurities in the water source. SW membranes, on the other hand, are designed specifically for seawater desalination and are suitable for seawater sources in high-pressure environments. Especially in arid and water-scarce areas, SW membranes can effectively remove salt and other impurities from seawater to produce freshwater suitable for drinking or industrial use.

[0034] By designing the low-pressure and high-pressure testing mechanisms as independent closed-loop testing circuits, and the independent configuration of the low-pressure pump group 1 and the high-pressure pump 7, the low-pressure pump group 1 is designed for FR membrane testing and adapts to its lower pressure range requirements; the high-pressure pump 7 meets the high-pressure testing requirements of SW membranes. This allows different types of membrane elements to be tested simultaneously or quickly switched, avoiding frequent replacement of testing devices and reducing downtime during equipment operation. The closed-loop testing circuit design allows the test raw water to circulate, reducing the consumption of raw water during testing, lowering water costs, and avoiding resource waste. By dividing the interior of the first dual-core membrane housing 2 and the second dual-core membrane housing 8 into two independent testing chambers through a solid pipe fitting 15, fluid and pressure interference between the membrane elements in the two independent testing chambers is avoided. Even if the membrane element in one testing chamber needs to be replaced or adjusted during testing, the testing in the other testing chamber will not be affected, reducing the frequency of membrane element replacement and disassembly / reassembly time. The design that allows simultaneous testing of two membrane elements or individual testing of one membrane element increases... The system enhances the flexibility of parallel testing in both chambers. By selectively connecting the low-pressure pump group 1 to the high-pressure testing mechanism, the outputs of the low-pressure pump group 1 and the high-pressure pump 7 can be flexibly and selectively connected to different test circuits, enabling rapid switching from low-pressure to high-pressure testing. In conjunction with the second dual-core membrane housing 8, the low-pressure pump group 1 and the high-pressure pump 7 can be connected to two independent test chambers of the second dual-core membrane housing 8. Since each test chamber within the second dual-core membrane housing 8 has an independent test circuit and pressure control, one test chamber can be used for FR membrane testing via the low-pressure pump group 1, while the other test chamber can be used for SW membrane testing via the high-pressure pump 7. The two chambers do not interfere with each other, thus enabling simultaneous testing of different types of membrane elements, effectively improving equipment utilization, achieving multi-task parallel testing, and significantly shortening the overall testing cycle. The temperature control mechanism 14 monitors the water temperature of the inlet component in real time and adjusts it to the ideal range, helping to simulate the temperature conditions in the actual working environment of the membrane element and avoiding test errors caused by temperature fluctuations.

[0035] like Figure 2As shown, the solid tube 15 can be fixed at the center of the width direction of the first dual-core membrane housing 2 and the second dual-core membrane housing 8, dividing the membrane housing into two independent test chambers. Each chamber has its own independent permeate channel 16 and concentrate channel 17, ensuring that it can complete the test process independently. The permeate channel 16 is the flow channel for pure water filtered through the reverse osmosis membrane; the concentrate channel 17 is the flow channel for the portion of raw water that has not passed through the reverse osmosis membrane. It is understood that the solid tube 15 can be made of corrosion-resistant and pressure-resistant materials, effectively resisting the erosion of high-salt-concentration or corrosive liquids during the test, avoiding material corrosion and damage, and extending its service life. The solid tube 15 can be, but is not limited to, stainless steel or duplex steel; no specific limitation is made here. In addition, each test chamber is equipped with a seal to ensure that no pressure leakage or fluid exchange occurs between the chambers during the test. The seal can be, but is not limited to, a silicone ring.

[0036] Because the output of the low-pressure pump group 1 can be selectively connected to the inlet of the second dual-core membrane housing 8, specifically, the low-pressure pump group 1 includes a first pressure pump, a second pressure pump, and a second electric valve. The first pressure pump and the second pressure pump are connected in parallel, and their output is connected to the inlet of the first dual-core membrane housing 2. The second pressure pump can be selectively connected to the inlet of the second dual-core membrane housing 8 through the second electric valve. Since the first and second pressure pumps are connected in parallel, each is responsible for connecting to different membrane elements. The first pressure pump is connected to the first dual-core membrane housing 2 to provide pressure suitable for the FW membrane element. The second pressure pump can be selectively connected to the second dual-core membrane housing 8. Therefore, the independent test chamber of the second dual-core membrane housing 8 can simultaneously test both FR and SW membranes, and their respective pressures can be controlled independently to avoid mutual interference. This design, by selectively connecting the second pressure pump to the second dual-core membrane housing 8, improves the utilization rate and production efficiency of the equipment.

[0037] Furthermore, both the low-pressure pump group 1 and the high-pressure pump 7 are equipped with pressure frequency converters. These frequency converters can progressively adjust the output water pressure of both pumps. Specifically, the initial and final output water pressures of the pump groups 1 and 7 can be adjusted sequentially, enabling soft start and soft stop of both pumps. This smooth control of the pump group's start and stop reduces water hammer caused by sudden pump start-up or shutdown, protecting the stability and durability of the entire testing system. It should be noted that the pressure of the low-pressure pump group 1 can be adjusted within the range of 0.69-1.55 MPa, and the pressure of the high-pressure pump 7 can be adjusted within the range of 3.00-6.00 MPa.

[0038] like Figure 1As shown, to improve testing efficiency, in some embodiments, the low- and medium-pressure testing mechanism further includes a first water distributor 3 and multiple first dual-core membrane housings 2, the multiple first dual-core membrane housings 2 connected in parallel, one end of the first water distributor 3 connected to the outlet end of the low- and medium-pressure pump group 1, and its other end connected to the inlet end of the multiple first dual-core membrane housings 2; and / or the high-pressure testing mechanism further includes a second water distributor 9 and multiple second dual-core membrane housings 8, the multiple second dual-core membrane housings 8 connected in parallel, one end of the second water distributor 9 connected to the outlet end of the high-pressure pump 7, and its other end connected to the inlet end of the multiple second dual-core membrane housings 8; its In this system, the parallel design of multiple first dual-core membrane housings 2 and / or second dual-core membrane housings 8 enables the simultaneous testing of multiple membrane elements, significantly increasing the testing capacity of the equipment and shortening the overall testing time. Furthermore, the parallel connection allows the testing equipment to increase or decrease the number of first dual-core membrane housings 2 and / or second dual-core membrane housings 8 as needed, flexibly adapting to testing tasks of different scales. The pump's output water is evenly distributed to each parallel dual-core membrane housing through the first water distributor 3 and the second water distributor 9, ensuring consistent testing conditions for each membrane element and avoiding test result deviations caused by uneven flow distribution.

[0039] For example, five first dual-core membrane housings 2 and five second dual-core membrane housings 8 are connected in parallel. If ten FR membranes are installed in the first dual-core membrane housing 2 and five FR membranes and five SW membranes are installed in the second dual-core membrane housing 8, and the low-pressure pump group and the high-pressure testing mechanism are connected, the water flow from the low-pressure pump group 1 is evenly distributed to the independent testing chamber in each of the parallel first dual-core membrane housings 2 through the first water distributor 3. Similarly, the second water distributor 9 distributes the water flow evenly to the independent testing chamber in each of the second dual-core membrane housings 8, including the water flow from the low-pressure pump group 1 and the high-pressure pump 7, so that different types of membrane elements are tested under corresponding pressure conditions. The water flow received by the membrane element in each testing chamber is equal, avoiding the influence of flow difference on the test results. At this time, up to 15 FR membranes and 5 SW membranes can be tested at the same time, meeting a variety of testing needs, without the need to replace membrane elements, enhancing the flexibility of testing, and improving the working efficiency of the equipment. In other embodiments, the number of multiple first dual-core membrane shells 2 connected in parallel may be, but is not limited to, 3, 4 or 6; the number of multiple second dual-core membrane shells 8 connected in parallel may be, but is not limited to, 3, 4 or 6, and no specific limitation is made here.

[0040] In order to detect the permeate water status of each independent test chamber, in some embodiments, the reverse osmosis membrane element testing equipment also includes multiple conductivity meters, which are respectively installed on the permeate water channel 16 of each independent test chamber. The conductivity meters can monitor the conductivity of the permeate water in real time, reflect changes in water quality in a timely manner, and help determine the working status and performance of the membrane element.

[0041] In order to adjust the opening and closing of the water flow path of each independent test chamber, in some embodiments, the reverse osmosis membrane element testing equipment also includes a plurality of first electric valves 13, which are respectively installed on the permeate channel 16 and the concentrate channel 17 of each independent test chamber. The first electric valves 13 can flexibly adjust the water flow state of different test chambers, support the individual or parallel testing of different membrane elements, and ensure that the flow direction, flow rate and flow velocity of the water meet the test requirements, thereby improving the controllability and accuracy of the test process.

[0042] In order to adjust the inlet flow rate of the first inlet component and the second inlet component, in some embodiments, the reverse osmosis membrane element testing equipment also includes flow control valves, which are respectively located at the inlet ends of the first inlet component and the second inlet component. By adjusting the inlet flow rate through the flow control valves, the actual working environment of the membrane element under different operating conditions can be simulated, making the testing process more consistent with real-world usage conditions, ensuring that the equipment can flexibly adapt to the testing requirements of various membrane elements, and increasing the adaptability of the equipment.

[0043] In some embodiments, the first water inlet assembly includes a first raw water tank 4, a first water supply pump 5, and a first filter 6, which are connected in series. The outlet of the first filter 6 is connected to the inlet of the first dual-core membrane housing 2, and the outlet of the first dual-core membrane housing 2 is connected to the inlet of the first raw water tank 4. The second water inlet assembly includes a second raw water tank 10, a second water supply pump 11, and a second filter 12, which are connected in series. The outlet of the second filter 12 is connected to the inlet of the second dual-core membrane housing 8, and the outlet of the second dual-core membrane housing 8 is connected to the inlet of the second raw water tank 10. The water inlet is supplied through the first raw water tank 4. The series configuration of water tank 4, first water pump 5, and first filter 6 effectively controls the direction and flow rate of water, ensuring that the first dual-core membrane housing 2 receives a stable and compliant water flow during testing. The second water inlet component adopts a similar design, which can independently control the water inlet flow of the second dual-core membrane housing 8 without interfering with other water inlet components, enhancing the flexibility and adjustability of the overall testing equipment. The first filter 6 and the second filter 12 can effectively remove impurities and suspended solids in the water, ensuring that the water quality entering the membrane element meets the requirements, and helping to prevent the membrane element from being polluted or blocked due to poor water quality.

[0044] To improve the accuracy of the temperature control mechanism 14, in some embodiments, the temperature control mechanism 14 includes a heat exchanger and multiple temperature sensors. A first water inlet assembly and a second water inlet assembly are connected to the heat exchanger, which can regulate the water temperature within the first water inlet assembly and the second water inlet assembly. Multiple temperature sensors are respectively installed on the first water inlet assembly and the second water inlet assembly and electrically connected to the heat exchanger. The heat exchanger can adjust the degree of heat exchange based on the water temperature monitored in real time by the temperature sensors. By installing multiple temperature sensors on the first water inlet assembly and the second water inlet assembly, the water temperature can be monitored in real time, ensuring that the water temperature of each water inlet assembly remains within a precise set range. By adjusting the degree of heat exchange based on these real-time monitoring results, precise temperature control can be achieved, thereby reducing the impact of temperature fluctuations and ensuring the consistency and accuracy of the water temperature during testing. The heat exchanger can be, but is not limited to, a shell-and-tube heat exchanger, and is not specifically limited here. Furthermore, the temperature control mechanism 14 also includes a cooling fan, which can assist in heat dissipation when the heat exchanger structure temperature is too high.

[0045] In some embodiments, each independent test chamber is equipped with a flow meter and a pressure gauge to monitor the test conditions within each independent test chamber in real time.

[0046] To facilitate observation by operators, in some embodiments, sampling valves are installed at the inlet and outlet of each independent test chamber to facilitate measurement and sampling by operators.

[0047] For ease of cleaning, in some embodiments, the reverse osmosis membrane element testing equipment also includes a cleaning assembly. This assembly includes a cleaning water tank 18, a cleaning water supply pump 19, and a cleaning water filter 20, connected in series. The outlet of the cleaning water filter 20 is connected to a first water distributor 3 and a second water distributor 9, respectively, for cleaning the test membrane elements and each individual test chamber. Furthermore, the inlet of the cleaning water tank 18 is connected to the outlet of a temperature control mechanism 14, which regulates the output water temperature within the cleaning water tank 18, thereby protecting the membrane elements and extending their service life.

[0048] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A reverse osmosis membrane element testing device for performance testing of FR membranes and / or SW membranes, characterized in that, The reverse osmosis membrane element testing equipment includes: The medium-low pressure testing mechanism includes a first water inlet component, a medium-low pressure pump group (1) and at least one first dual-core membrane housing (2), which are connected in series. The water outlet of the first dual-core membrane housing (2) is connected to the water inlet of the first water inlet component to form a first closed-loop test circuit. The first test raw water can circulate in the first closed-loop test circuit to test the performance of the FR membrane. The high-pressure testing mechanism includes a second water inlet assembly, a high-pressure pump (7) and at least one second dual-core membrane housing (8), which are connected in series. The outlet end of the second dual-core membrane housing (8) is connected to the inlet end of the second water inlet assembly to form a second closed-loop test circuit. The second test raw water can circulate in the second closed-loop test circuit to test the performance of the SW membrane. The output end of the medium-low pressure pump set (1) can be selectively connected to the inlet end of the second dual-core membrane housing (8) to facilitate switching between medium-low pressure and high pressure testing; The first dual-core membrane shell (2) and the second dual-core membrane shell (8) are each provided with a solid tube (15). The solid tube (15) divides the first dual-core membrane shell (2) and the second dual-core membrane shell (8) into two independent test chambers, so that the membrane elements in the two independent test chambers can be tested simultaneously or individually. Temperature control mechanism (14) is connected to the first water inlet component and the second water inlet component respectively, and is used to monitor and adjust the water temperature in real time.

2. The reverse osmosis membrane element testing equipment according to claim 1, characterized in that, The medium-low pressure testing mechanism further includes a first water distributor (3) and multiple first dual-core membrane housings (2), the multiple first dual-core membrane housings (2) are connected in parallel, the inlet end of the first water distributor (3) is connected to the outlet end of the medium-low pressure pump group (1), and its outlet end is connected to the inlet end of the multiple first dual-core membrane housings (2); and / or The high-pressure testing mechanism also includes a second water distributor (9) and multiple second dual-core membrane shells (8), the multiple second dual-core membrane shells (8) are connected in parallel, the inlet end of the second water distributor (9) is connected to the outlet end of the high-pressure pump (7), and its outlet end is connected to the inlet end of the multiple second dual-core membrane shells (8).

3. The reverse osmosis membrane element testing equipment according to claim 2, characterized in that, The reverse osmosis membrane element testing equipment also includes multiple conductivity meters, which are respectively installed on the product water channel (16) of each of the independent test chambers.

4. The reverse osmosis membrane element testing equipment according to claim 3, characterized in that, The reverse osmosis membrane element testing equipment also includes a plurality of first electric valves (13), which are respectively located on the product water channel (16) and concentrate channel (17) of each of the independent test chambers.

5. The reverse osmosis membrane element testing equipment according to claim 3, characterized in that, The reverse osmosis membrane element testing equipment also includes flow control valves, which are respectively located at the inlet ends of the first inlet component and the second inlet component.

6. The reverse osmosis membrane element testing equipment according to claim 1, characterized in that, The medium and low pressure pump group (1) includes a first pressure pump, a second pressure pump and a second electric valve. The first pressure pump and the second pressure pump are connected in parallel, and their output end is connected to the water inlet end of the first dual-core membrane housing (2). The second pressure pump can be selectively connected to the water inlet end of the second dual-core membrane housing (8) through the second electric valve.

7. The reverse osmosis membrane element testing equipment according to claim 6, characterized in that, Both the medium-low pressure pump group (1) and the high pressure pump (7) are equipped with pressure frequency converters, which can adjust the output water pressure of the medium-low pressure pump group (1) and the high pressure pump (7) step by step.

8. The reverse osmosis membrane element testing equipment according to any one of claims 1-7, characterized in that, The first water inlet assembly includes a first raw water tank (4), a first water supply pump (5), and a first filter (6), which are connected in series. The outlet of the first filter (6) is connected to the inlet of the first dual-core membrane shell (2), and the outlet of the first dual-core membrane shell (2) is connected to the inlet of the first raw water tank (4). The second water inlet assembly includes a second raw water tank (10), a second water supply pump (11), and a second filter (12), which are connected in series. The outlet of the second filter (12) is connected to the inlet of the second dual-core membrane shell (8), and the outlet of the second dual-core membrane shell (8) is connected to the inlet of the second raw water tank (10).

9. The reverse osmosis membrane element testing equipment according to any one of claims 1-7, characterized in that, The temperature control mechanism (14) includes a heat exchanger and multiple temperature sensors. The first water inlet assembly and the first water inlet component are connected to the heat exchanger. The heat exchanger can adjust the water temperature in the first water inlet assembly and the first water inlet assembly. The multiple temperature sensors are respectively installed on the first water inlet assembly and the second water inlet assembly and are electrically connected to the heat exchanger. The heat exchanger can adjust the degree of heat exchange according to the water temperature result monitored in real time by the temperature sensors.

10. The reverse osmosis membrane element testing equipment according to any one of claims 1-7, characterized in that, The solid pipe fitting (15) is made of corrosion-resistant and pressure-resistant material.

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