An adjustable segment reverse osmosis membrane detection system

Abstract

The present invention discloses an adjustable segmented reverse osmosis membrane detection system, comprising a raw water tank, a produced water tank, a concentrated water tank and an electronic control device, as well as a first reverse osmosis membrane device, a second reverse osmosis membrane device, a third reverse osmosis membrane device and a fourth reverse osmosis membrane device connected in parallel. The system is equipped with four sets of reverse osmosis membrane devices, and can realize four operation modes of one or more operation through valve adjustment; it is equipped with a raw water tank, a produced water tank and a concentrated water tank, and can realize the switching between continuous self-circulation operation and non-self-circulation operation of the system through valve adjustment.

Description

Technical Field

[0001] The invention relates to the technical field of water treatment equipment detection, and in particular to an adjustable segment type reverse osmosis membrane detection system. Background Art

[0002] With the increasing demand for high-quality recycled water, RO (reverse osmosis) technology has been gradually widely used in the field of sewage regeneration to meet its desalination requirements. At the same time, reverse osmosis technology can effectively remove pollutants such as colloids, pathogenic microorganisms, dissolved organic matter, and some ions, and has the advantages of desalination rate of more than 90%, simple operation, stable water quality, and small footprint. Although MF (microfiltration) or UF (ultrafiltration), grids, self-cleaning filters, security filters, etc. are used as pretreatment to ensure the quality of RO influent water during the operation of the RO process, and a large amount of chemicals are added to reduce, prevent or remove membrane pollution to ensure the efficient operation of the membrane, in the actual operation process, many soluble substances, including organic and inorganic substances, can still pass through these pretreatment barriers, adsorb, accumulate or precipitate on the surface of the reverse osmosis membrane, causing membrane pollution. The membrane pollution problem is still one of the important problems facing RO technology, limiting the operation efficiency of the reverse osmosis process.

[0003] In actual water plants, it is not easy to compare the membrane fouling control effects of various pretreatment processes. Therefore, it is necessary to build a laboratory-scale RO device to compare a large number of different pretreatment processes. It can also be used to evaluate the performance of RO membranes with different degrees of fouling. Summary of the invention

[0004] The purpose of the present invention is to provide a reverse osmosis membrane detection system which can realize segmented adjustment. The system has a compact and reasonable structure. Raw water passes through the reverse osmosis membrane in multiple paths and segments, and detects the water quality before and after to realize the detection of the reverse osmosis membrane.

[0005] In order to achieve the above object, the present invention is specifically implemented through the following technical solutions:

[0006] An adjustable segment reverse osmosis membrane detection system comprises a raw water tank, a produced water tank, a concentrated water tank and an electronic control device, and a first reverse osmosis membrane device, a second reverse osmosis membrane device, a third reverse osmosis membrane device and a fourth reverse osmosis membrane device connected in parallel, each group of reverse osmosis membrane devices having a raw water inlet, a produced water outlet and a concentrated water outlet;

[0007] The raw water tank is connected to the raw water inlet of each reverse osmosis membrane device through the raw water inlet pipe group and the raw water valve group, the produced water tank is connected to the produced water inlet of each reverse osmosis membrane device through the produced water outlet pipe group and the produced water valve group, and the concentrated water tank is connected to the concentrated water inlet of each reverse osmosis membrane device through the concentrated water outlet pipe group and the concentrated water valve group;

[0008] A raw water main pipe is arranged between the raw water tank and the raw water inlet pipe group, on which a raw water pump and a raw water main valve are installed in sequence, and the raw water pump is connected to the electronic control device; a production water main pipe is arranged between the production water tank and the production water outlet pipe group, on which a production water main valve is installed; a concentrate water main pipe is arranged between the concentrate water tank and the concentrate water inlet pipe group, on which a concentrate water main valve is installed;

[0009] The upper concentrated water outlet between adjacent groups of reverse osmosis membrane devices is connected to the raw water inlet of the lower reverse osmosis membrane device through a primary water connecting pipe group and a primary valve group, and the concentrated water outlets of the first reverse osmosis membrane device and the second reverse osmosis membrane device are both connected to the raw water inlet of the third reverse osmosis membrane device through a secondary water connecting pipe and a secondary valve.

[0010] For further improvement of the above scheme, a first pressure transmitter is arranged at the raw water inlet of each group of reverse osmosis membrane devices, a second pressure transmitter is connected to the concentrated water outlet of each group of reverse osmosis membrane devices, a first online monitoring device is connected downstream of the produced water outlet of each group of reverse osmosis membrane devices, and the first pressure transmitter, the second pressure transmitter and the first online monitoring device are respectively connected to the electronic control device.

[0011] A further improvement of the above scheme, the system also includes a cleaning water tank, which is connected to the raw water inlet of each reverse osmosis membrane device through a cleaning water inlet pipe group and a cleaning valve group, a cleaning water outlet main pipe is arranged between the cleaning water tank and the cleaning water inlet pipe group, a cleaning water pump is connected to the cleaning water outlet main pipe, the cleaning water tank is connected to the production water main pipe through the production water tank cleaning pipe and the production water tank cleaning valve, and the cleaning water tank is connected to the concentrated water main pipe through the concentrated water tank cleaning pipe and the concentrated water tank cleaning valve. The cleaning water tank is configured to prepare different cleaning solutions to clean the contaminated membrane.

[0012] As a further improvement to the above scheme, the raw water tank is connected to the production water main pipe through the production water circulation pipe and the production water circulation valve, and the raw water tank is connected to the concentrate water main pipe through the concentrate water circulation pipe and the concentrate water circulation valve. When the production water circulation valve and the concentrate water circulation valve are opened, the concentrate water and production water obtained by the system operation are collected into the raw water tank, and the raw water is kept unchanged. The system can be circulated back and forth to achieve self-circulation operation. When self-circulation operation is not required, the two valves can be closed, and the system's production water and concentrate water are returned to the production water tank and the concentrate water tank respectively, and collected separately to measure the water quality.

[0013] A further improvement on the above scheme, the first reverse osmosis membrane device, the second reverse osmosis membrane device, the third reverse osmosis membrane device and the fourth reverse osmosis membrane device all include a reverse osmosis membrane, an isolation mesh and a membrane shell. The membrane shell is made of a transparent material and is arranged on the top of the magnetic agitator. A raw water inlet and a concentrated water outlet are opened at the bottom of the membrane shell, and a produced water outlet is opened at the top of the membrane shell. The reverse osmosis membrane is horizontally installed in the membrane shell, and the isolation mesh is arranged on the produced water outlet side of the reverse osmosis membrane.

[0014] As a further improvement to the above solution, a liquid level sensor is installed in the raw water tank.

[0015] As a further improvement to the above scheme, a second online monitoring device, a first temperature gauge, a first pressure gauge, and a first check valve are installed on the raw water main pipe, and the first check valve is located between the raw water pump and the raw water main valve.

[0016] As a further improvement to the above solution, a second temperature gauge and a second pressure gauge are also provided on the cleaning water outlet main pipe.

[0017] As a further improvement to the above scheme, a second raw water pipe is connected between the raw water main pipe and the raw water tank, the connection point between the second raw water pipe and the raw water main pipe is located between the first check valve and the raw water main valve, and a second raw water valve is arranged on the second raw water pipe.

[0018] As a further improvement to the above scheme, the system also includes a frame, a raw water tank, a produced water tank and a concentrated water tank are installed at the bottom of the left side of the frame, a first reverse osmosis membrane device, a second reverse osmosis membrane device, a third reverse osmosis membrane device and a fourth reverse osmosis membrane device are installed in the middle of the left side, a raw water pump is installed at the bottom of the right side of the frame, an electric control cabinet is installed in the middle of the right side, and the electric control device is installed in the electric control cabinet. The frame adopts a floor-standing design, and the entire frame is made of 316 stainless steel, which is sturdy, beautiful and easy to move.

[0019] Beneficial effects of the technical solution of the present invention

[0020] (1) Four sets of reverse osmosis membrane devices are configured, and through valve adjustment, four operation modes can be realized in any one or more operation modes; raw water tanks, product water tanks and concentrate water tanks are configured, and through valve adjustment, the system can switch between continuous self-circulation operation and non-self-circulation operation.

[0021] (2) It is suitable for general-purpose membranes. By replacing different membranes, it can simultaneously meet the functional requirements of reverse osmosis and nanofiltration membrane performance testing, with a maximum operating pressure of 25 bar. It can be used for conventional membrane testing, material clarification and impurity removal, as well as classification, desalination, concentration, etc. Different membranes are selected for different water qualities, and the produced water and concentrated water are obtained through membrane filtration to achieve the effects of clarification and impurity removal. Of course, the concentrated water can also be filtered and graded to achieve the effect of concentration.

[0022] (3) The membrane shell is made of transparent material, so the operation status inside the membrane pool can be observed intuitively; the raw water pump of the detection system of the present invention adopts a high-pressure pump with variable frequency, high reliability, corrosion resistance, and can accurately adjust the flow rate; online instruments such as flow, pressure, temperature, pH, and conductivity are set to facilitate the monitoring of changes in various system parameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a connection diagram of Embodiment 1 of the present invention;

[0024] Figure 2 This is a connection diagram of Embodiment 2 of the present invention;

[0025] Figure 3 It is a schematic diagram of the principle structure of a reverse osmosis membrane device;

[0026] Figure 4 It is a schematic diagram of the rack connection structure of the present invention. DETAILED DESCRIPTION

[0027] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. In the description of the present invention, it should be understood that, unless otherwise clearly specified and limited, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0028] The directions or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “top”, “bottom”, “inside”, “outside”, “center”, “vertical” and “horizontal” are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0029] The first feature being “above” or “below” the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being “above”, “above”, and “above” the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being “below”, “below”, and “below” the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0030] The terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0031] like Figure 1, an adjustable segmented reverse osmosis membrane detection system of the first embodiment comprises a raw water tank 1, a production water tank 2, a concentrate water tank 3 and an electronic control device, as well as a first reverse osmosis membrane device 4, a second reverse osmosis membrane device 5, a third reverse osmosis membrane device 6 and a fourth reverse osmosis membrane device 7 connected in parallel, and the temperature of the raw water tank 1 is controlled by a constant temperature water bath. In a specific embodiment, the capacity of the raw water tank 1, the production water tank 2 and the concentrate water tank 3 can all be 100L, so that the total amount of production water and concentrate water flowing out of the raw water tank 1 after being filtered by each reverse osmosis membrane device is completely collected with the amount of raw water, and preferably, a liquid level sensor 37 is installed in the raw water tank. The first reverse osmosis membrane device 4, the second reverse osmosis membrane device 5, the third reverse osmosis membrane device 6 and the fourth reverse osmosis membrane device 7 are devices of the same structure, and each reverse osmosis membrane device has a raw water inlet 34, a production water outlet 36 and a concentrate water outlet 35. The first reverse osmosis membrane device 4, the second reverse osmosis membrane device 5, the third reverse osmosis membrane device 6 and the fourth reverse osmosis membrane device 7 can be existing reverse osmosis membrane filtration devices. The water inlet and outlet of the reverse osmosis membrane filtration devices can be installed corresponding to each water pipe of the system to test the water quality filtration situation at multiple stages.

[0032] like Figure 3 The structure of the reverse osmosis membrane device is shown. The first reverse osmosis membrane device 4, the second reverse osmosis membrane device 5, the third reverse osmosis membrane device 6 and the fourth reverse osmosis membrane device 8 all include a reverse osmosis membrane 29, an isolation mesh 30 and a membrane shell 31. The membrane shell 31 is made of a transparent material. The bottom of the shell of the membrane shell 31 is provided with a raw water inlet 34 and a concentrated water outlet 35. The top of the membrane shell 31 is provided with a produced water outlet 36. The reverse osmosis membrane 29 is transversely installed in the membrane shell 31, and the isolation mesh 30 is arranged on the produced water outlet side of the reverse osmosis membrane 29. The reverse osmosis membrane device can evaluate the performance of the reverse osmosis membrane that is blocked to different degrees and types, and test the water flux, transmembrane pressure difference, desalination rate, etc. of the membrane.

[0033] The raw water tank 1 is connected to the raw water inlet 34 of each reverse osmosis membrane device through the raw water inlet pipe group and the raw water valve group. The raw water inlet pipe group includes a first raw water inlet pipe 1-1, a second raw water inlet pipe 1-2, a third raw water inlet pipe 1-3 and a fourth raw water inlet pipe 1-4 respectively connected to the raw water main pipe 11, and respectively correspond to the first reverse osmosis membrane device 4, the second reverse osmosis membrane device 5, the third reverse osmosis membrane device 6 and the fourth reverse osmosis membrane device 7. The raw water valve group includes a first raw water valve 1-5, a second raw water valve 1-6, a third raw water valve 1-7 and a fourth raw water valve 1-8, which are respectively installed on the first raw water inlet pipe 1-1, the second raw water inlet pipe 1-2, the third raw water inlet pipe 1-3 and the fourth raw water inlet pipe 1-4, and respectively correspond to the first reverse osmosis membrane device 4, the second reverse osmosis membrane device 5, the third reverse osmosis membrane device 6 and the fourth reverse osmosis membrane device 7. A parallel valve 48 is provided on the raw water main pipe 11 between the second reverse osmosis membrane device 5 and the third reverse osmosis membrane device 6. Specifically, the parallel valve 48 is provided on the raw water main pipe 11 between the connection points of the second raw water inlet pipe 1-2 and the third raw water inlet pipe 1-3 and the raw water main pipe 11.

[0034] A raw water main pipe 11 is arranged between the raw water tank 1 and the raw water inlet pipe group, and a raw water pump 12 and a raw water main valve 13 are installed on the raw water main pipe 11, and specifically, the raw water main pipe 11 connects the raw water tank 1 with the first raw water inlet pipe 1-1, the second raw water inlet pipe 1-2, the third raw water inlet pipe 1-3 and the fourth raw water inlet pipe 1-4 of the raw water inlet pipe group, and is controlled by the raw water main valve 13. The raw water pump 12 uses a high-pressure variable frequency water pump, and the flow rate can be accurately controlled by adjusting the electronic control device.

[0035] The water production tank 2 is connected to the water production inlet 36 of each reverse osmosis membrane device through the water production outlet pipe group and the water production valve group. The water production outlet pipe group includes the first water production outlet pipe 2-1, the second water production outlet pipe 2-2, the third water production outlet pipe 2-3 and the fourth water production outlet pipe 2-4 which are connected to the water production main pipe 11 respectively, and correspond to the first reverse osmosis membrane device 4, the second reverse osmosis membrane device 5, the third reverse osmosis membrane device 6 and the fourth reverse osmosis membrane device 7 respectively. The water production valve group includes the first water production valve 2-5, the second water production valve 2-6, the third water production valve 2-7 and the fourth water production valve 2-8, which are respectively installed on the first water production outlet pipe 2-1, the second water production outlet pipe 2-2, the third water production outlet pipe 2-3 and the fourth water production outlet pipe 2-4, and correspond to the first reverse osmosis membrane device 4, the second reverse osmosis membrane device 5, the third reverse osmosis membrane device 6 and the fourth reverse osmosis membrane device 7 respectively.

[0036] A water production main pipe 14 is arranged between the water production tank 2 and the water production outlet pipe group, and a water production main valve 15 is installed on the water production main pipe 14. Specifically, the water production main pipe 14 connects the water production tank 2 with the first water production outlet pipe 2-1, the second water production outlet pipe 2-2, the third water production outlet pipe 2-3 and the fourth water production outlet pipe 2-4 of the water production outlet pipe group, and is controlled by the water production main valve 15.

[0037] The concentrate tank 3 is connected to the concentrate inlet 35 of each group of reverse osmosis membrane devices through the concentrate outlet pipe group and the concentrate valve group. The concentrate outlet pipe group includes a first concentrate outlet pipe 3-1, a second concentrate outlet pipe 3-2, a third concentrate outlet pipe 3-3 and a fourth concentrate outlet pipe 3-4, which correspond to the first reverse osmosis membrane device 4, the second reverse osmosis membrane device 5, the third reverse osmosis membrane device 6 and the fourth reverse osmosis membrane device 7 respectively. The concentrate valve group includes a first concentrate valve 3-5, a second concentrate valve 3-6, a third concentrate valve 3-7 and a fourth concentrate valve 3-8, which are respectively installed on the first concentrate outlet pipe 3-1, the second concentrate outlet pipe 3-2, the third concentrate outlet pipe 3-3 and the fourth concentrate outlet pipe 3-4, which correspond to the first reverse osmosis membrane device 4, the second reverse osmosis membrane device 5, the third reverse osmosis membrane device 6 and the fourth reverse osmosis membrane device 7 respectively. The raw water inlet pipe group and the produced water outlet pipe group both use 3 / 8" SS316 rigid pipes, and the concentrate water outlet pipe group uses 3 / 8" flexible pipes.

[0038] A concentrate main pipe 16 is arranged between the concentrate tank 3 and the concentrate inlet pipe group, and a concentrate main valve 17 is installed on the concentrate main pipe 16. Specifically, the concentrate main pipe 16 connects the concentrate tank 3 with the first concentrate outlet pipe 3-1, the second concentrate outlet pipe 3-2, the third concentrate outlet pipe 3-3 and the fourth concentrate outlet pipe 3-4 of the concentrate outlet pipe group, and is controlled by the concentrate main valve 17.

[0039] like Figure 2 As shown, in the second embodiment, the raw water inlet 34 of each group of reverse osmosis membrane devices is provided with a first pressure transmitter 8, and there are four groups of the first pressure transmitter 8, which correspond to the first reverse osmosis membrane device 4, the second reverse osmosis membrane device 5, the third reverse osmosis membrane device 6 and the fourth reverse osmosis membrane device 7 respectively. The concentrated water outlet 35 of each group of reverse osmosis membrane devices is connected to a second pressure transmitter 9, and there are four groups of the second pressure transmitter 9, which correspond to the first reverse osmosis membrane device 4, the second reverse osmosis membrane device 5, the third reverse osmosis membrane device 6 and the fourth reverse osmosis membrane device 7 respectively. The downstream of the produced water outlet 36 of each group of reverse osmosis membrane devices is connected to a first online monitoring device 10, and there are four groups of the first online monitoring device 10, which correspond to the first reverse osmosis membrane device 4, the second reverse osmosis membrane device 5, the third reverse osmosis membrane device 6 and the fourth reverse osmosis membrane device 7 respectively. In the first embodiment, the first pressure transmitter 8, the second pressure transmitter 9 and the first online monitoring device 10 preferably adopt an offline detection method, and a sampling port is reserved on the corresponding pipeline.

[0040] The upper concentrated water outlet between adjacent reverse osmosis membrane devices is connected to the raw water inlet of the next reverse osmosis membrane device through the primary water pipe group and the primary valve group. Specifically, the primary water pipe group is three groups, including the first primary water pipe 4-1, the second primary water pipe 4-2 and the third primary water pipe 4-3, the primary valve group includes the first primary valve 4-4, the second primary valve 4-5 and the third primary valve 4-6, the concentrated water outlet 35 of the first reverse osmosis membrane device 4 is connected to the raw water inlet of the second reverse osmosis membrane device 5 through the first primary water pipe 4-1 and the first primary valve 4-4, when the first primary valve 4-4 is opened, the concentrated water filtered by the first reverse osmosis membrane device 4 can enter the second reverse osmosis membrane device 5 for filtering again, so as to realize two-stage filtration. Similarly, the concentrated water outlet of the second reverse osmosis membrane device 5 is connected to the raw water inlet of the third reverse osmosis membrane device 6 through the second first-level water connecting pipe 4-2 and the second first-level valve 4-5; the concentrated water outlet of the third reverse osmosis membrane device 6 is connected to the raw water inlet of the fourth reverse osmosis membrane device 7 through the third first-level water connecting pipe 4-3 and the third first-level valve 4-6. When the first first-level valve 4-4, the second first-level valve 4-5 and the third first-level valve 4-6 are all in the open state, and only the first raw water valve 1-5 is opened, the four-stage filtration of water can be achieved.

[0041] The concentrated water outlet 35 of the first reverse osmosis membrane device 4 and the second reverse osmosis membrane device 5 is connected to the raw water inlet pipe of the third reverse osmosis membrane device 6 through the secondary water pipe group and the secondary valve group. Specifically, the secondary water pipe group includes the first secondary water inlet pipe 5-1 and the second secondary water pipe 5-2, and the secondary valve group includes the first secondary valve 5-3 and the second secondary valve 5-4. The concentrated water outlet of the first reverse osmosis membrane device 4 is connected to the third raw water inlet pipe 1-3 upstream of the third raw water valve 1-7 of the third reverse osmosis membrane device 6 through the first secondary water inlet pipe 5-1 and the first secondary valve 5-3, or is connected to the raw water main pipe 11 downstream of the parallel valve 48. Similarly, the concentrated water outlet of the second reverse osmosis membrane device 4 is connected to the third raw water inlet pipe 1-3 of the third reverse osmosis membrane device 6 through the second secondary water inlet pipe 5-2 and the second secondary valve 5-4, and is located upstream of the third raw water valve 1-7. When the first secondary valve 5-3 and the second secondary valve 5-4 are opened, the water filtered from the first reverse osmosis membrane device 4 and / or the second reverse osmosis membrane device 5 enters the third reverse osmosis membrane device 6 and / or the fourth reverse osmosis membrane device 7. After all pipelines are flexibly connected, the number of filtration sections can be controlled according to actual test needs to control the opening and closing of each valve, and the test direction can be adjusted in a variety of ways.

[0042] The electronic control device is respectively connected to the corresponding first pressure transmitter 8 and second pressure transmitter 9 of the first reverse osmosis membrane device 4 , the second reverse osmosis membrane device 5 , the third reverse osmosis membrane device 6 and the fourth reverse osmosis membrane device 7 and the first online monitoring device 10 , and is control-connected to the raw water pump 12 .

[0043] In a further improved embodiment, the system further includes a cleaning water tank 18, which is connected to the raw water inlet of each reverse osmosis membrane device through a cleaning water inlet pipe group and a cleaning valve group. A cleaning water outlet main pipe 19 is provided between the cleaning water tank and the cleaning water inlet pipe group. A cleaning water pump 20 is connected to the cleaning water outlet main pipe 19, and a second check valve is also provided on the cleaning water outlet main pipe 19. The cleaning water tank 18 is connected to the production water main pipe 14 through a production water tank cleaning pipe 21 and a production water tank cleaning valve 22, and the cleaning water tank 18 is connected to the concentrated water main pipe 16 through a concentrated water tank cleaning pipe 23 and a concentrated water tank cleaning valve 24. By configuring the cleaning water tank 18, different cleaning liquids can be prepared to clean the contaminated membrane. Preferably, a second thermometer 41 and a second pressure gauge 42 are also provided on the cleaning water outlet main pipe 19 to detect the outlet water temperature and pressure of the cleaning water tank.

[0044] In a further improved embodiment, the raw water tank 1 is connected to the production water main pipe 15 through the production water circulation pipe 25 and the production water circulation valve 26, and the raw water tank 1 is connected to the concentrate water main pipe 16 through the concentrate water circulation pipe 27 and the concentrate water circulation valve 28. When the production water circulation valve 26 and the concentrate water circulation valve 28 are opened, the concentrate water and production water obtained by the system operation are collected into the raw water tank 1, and the raw water is kept unchanged, and the system is circulated back and forth, so that the system can achieve self-circulation operation. When the self-circulation operation is not needed, the two valves can be closed, and the system's production water and concentrate water are returned to the production water tank 2 and the concentrate water tank 3 respectively, and are collected separately to measure the water quality.

[0045] In a further improved embodiment, a second online monitoring device 38 , a first temperature gauge 39 , a first pressure gauge 40 , and a first check valve 43 are installed on the raw water main pipe 11 , and the first check valve 43 is located between the raw water pump 12 and the raw water main valve 13 .

[0046] In a further improved embodiment, a second raw water pipe 44 is connected between the raw water main pipe 11 and the raw water tank 1 , the connection point between the second raw water pipe 44 and the raw water main pipe 11 is located between the first check valve 43 and the raw water main valve 11 , and a second raw water valve 45 is provided on the second raw water pipe 44 .

[0047] like Figure 4As shown, the system also includes a frame 46, which is a sheet metal frame structure. A raw water tank 1, a produced water tank 2 and a concentrated water tank 3 are installed at the bottom of the left side of the frame 46, a first reverse osmosis membrane device 4, a second reverse osmosis membrane device 5, a third reverse osmosis membrane device 6 and a fourth reverse osmosis membrane device 7 are installed in the middle of the left side, a raw water pump 12 is installed at the bottom of the right side of the frame 46, and an electric control cabinet 47 is installed in the middle of the right side. The electric control device is installed in the electric control cabinet 47. The frame adopts a floor-standing design, and the entire frame is made of 316 stainless steel, which is sturdy, beautiful and easy to move.

[0048] When the first raw water valve 1-5, the second raw water valve 1-6, the third raw water valve 1-7, the fourth raw water valve 1-8, the first concentrated water valve 3-5, the second concentrated water valve 3-6, the third concentrated water valve 3-7 and the fourth concentrated water valve 3-8 and the parallel valve 48 are opened, the first reverse osmosis membrane device 4, the second reverse osmosis membrane device 5, the third reverse osmosis membrane device 6 and the fourth reverse osmosis membrane device 7 can be operated in parallel, and the raw water flows out of the produced water and concentrated water after only one reverse osmosis membrane device.

[0049] When the first raw water valve 1-5, the first level valve 4-4, the second level valve 4-5, the third level valve 4-6 and the fourth concentrated water valve 3-8 are opened, the first reverse osmosis membrane device 4, the second reverse osmosis membrane device 5, the third reverse osmosis membrane device 6 and the fourth reverse osmosis membrane device 7 can be operated in series, and the raw water passes through the reverse osmosis membrane device four times and then flows out as produced water and concentrated water.

[0050] When the first raw water valve 1-5, the second raw water valve 1-6, the third raw water valve 1-7 and the fourth raw water valve 1-8, the first secondary valve 5-3, the second secondary valve 5-4, the third concentrated water valve 3-7 and the fourth concentrated water valve 3-8 are opened, the concentrated water obtained after the raw water passes through the first reverse osmosis membrane device 4 and the second reverse osmosis membrane device 5 is divided into the third reverse osmosis membrane device 6 and the fourth reverse osmosis membrane device 7, forming a 2:2 series mode.

[0051] When the first raw water valve 1-5, the second raw water valve 1-6, the third raw water valve 1-7, the first secondary valve 5-3, the second secondary valve 5-4, the third primary valve 4-6 and the fourth concentrated water valve 3-8 are opened, the concentrated water obtained after the raw water passes through the first reverse osmosis membrane device 4 and the second reverse osmosis membrane device 5 enters the third reverse osmosis membrane device 6 and the fourth reverse osmosis membrane device 7 in sequence, forming a 2:1:1 series mode.

[0052] The specific embodiments of the present invention are merely explanations of the present invention and are not limitations of the present invention. After reading this specification, those skilled in the art may make modifications to the embodiments without any creative contribution as needed. However, such modifications are protected by the patent law as long as they are within the scope of the claims of the present invention.

Claims

1. An adjustable segment reverse osmosis membrane detection system, characterized in that: It comprises a raw water tank (1), a produced water tank (2), a concentrated water tank (3), and an electronic control device, as well as a first reverse osmosis membrane device (4), a second reverse osmosis membrane device (5), a third reverse osmosis membrane device (6), and a fourth reverse osmosis membrane device (7) connected in parallel with each other, each reverse osmosis membrane device having a raw water inlet (34), a produced water outlet (36), and a concentrated water outlet (35); The raw water tank is connected to the raw water inlet of each reverse osmosis membrane device through the raw water inlet pipe group and the raw water valve group, the produced water tank is connected to the produced water inlet of each reverse osmosis membrane device through the produced water outlet pipe group and the produced water valve group, and the concentrated water tank is connected to the concentrated water inlet of each reverse osmosis membrane device through the concentrated water outlet pipe group and the concentrated water valve group; A raw water main pipe (11) is arranged between the raw water tank and the raw water inlet pipe group, and a raw water pump (12) and a raw water main valve (13) are installed on the raw water main pipe, which are connected in sequence, and the raw water pump is connected to the electronic control device; A water production main pipe (14) is provided between the water production tank and the water production outlet pipe group, and a water production main valve (15) is installed on the water production main pipe; a concentrate water main pipe (16) is provided between the concentrate water tank and the concentrate water inlet pipe group, and a concentrate water main valve (17) is installed on the concentrate water main pipe; The raw water tank is connected to the production water main pipe via a production water circulation pipe (25) and a production water circulation valve (26), and the raw water tank is connected to the concentrate water main pipe via a concentrate water circulation pipe (27) and a concentrate water circulation valve (28); A second raw water pipe (44) is connected between the raw water main pipe and the raw water tank, the connection point between the second raw water pipe and the raw water main pipe is located between the first check valve and the raw water main valve, and a second raw water valve (45) is provided on the second raw water pipe; The upper concentrated water outlet between adjacent groups of reverse osmosis membrane devices is connected to the raw water inlet of the next group of reverse osmosis membrane devices through a first-level water connecting pipe group and a first-level valve group, and the concentrated water outlet of the first reverse osmosis membrane device and the second reverse osmosis membrane device is connected to the raw water inlet pipe of the third group of reverse osmosis membrane devices through a second-level water connecting pipe group and a second-level valve group.

2. The adjustable segmented reverse osmosis membrane detection system according to claim 1, characterized in that: A first pressure transmitter (8) is provided at the raw water inlet of each reverse osmosis membrane device, a second pressure transmitter (9) is connected to the concentrated water outlet of each reverse osmosis membrane device, a first online monitoring device (10) is connected downstream of the produced water outlet of each reverse osmosis membrane device, and the first pressure transmitter, the second pressure transmitter and the first online monitoring device are respectively connected to the electronic control device.

3. The adjustable segmented reverse osmosis membrane detection system according to claim 1, characterized in that: The system also includes a cleaning water tank (18), which is connected to the raw water inlet of each reverse osmosis membrane device through a cleaning water inlet pipe group and a cleaning valve group. A cleaning water outlet main pipe (19) is arranged between the cleaning water tank and the cleaning water inlet pipe group. The cleaning water outlet main pipe (19) is connected to a cleaning water pump (20). The cleaning water tank is connected to the production water main pipe through a production water tank cleaning pipe (21) and a production water tank cleaning valve (22). The cleaning water tank is connected to the concentrated water main pipe through a concentrated water tank cleaning pipe (23) and a concentrated water tank cleaning valve (24).

4. The adjustable segmented reverse osmosis membrane detection system according to claim 1, characterized in that: The first reverse osmosis membrane device, the second reverse osmosis membrane device, the third reverse osmosis membrane device and the fourth reverse osmosis membrane device all include a reverse osmosis membrane (29), an isolation mesh (30) and a membrane shell (31). The membrane shell is made of a transparent material. A raw water inlet (34) and a concentrated water outlet (35) are provided at the bottom of the membrane shell. A produced water outlet (36) is provided at the top of the membrane shell. The reverse osmosis membrane is transversely installed in the membrane shell. The isolation mesh is provided on the produced water outlet side of the reverse osmosis membrane.

5. The adjustable segmented reverse osmosis membrane detection system according to claim 1, characterized in that: A liquid level sensor (37) is installed in the raw water tank.

6. The adjustable segmented reverse osmosis membrane detection system according to claim 1, characterized in that: A second online monitoring device (38), a first temperature gauge (39), a first pressure gauge (40), and a first check valve (43) are installed on the raw water main pipe, and the first check valve is located between the raw water pump and the raw water main valve.

7. The adjustable segmented reverse osmosis membrane detection system according to claim 2, characterized in that: A second temperature gauge (41) and a second pressure gauge (42) are also provided on the main cleaning water outlet pipe.

8. The adjustable segmented reverse osmosis membrane detection system according to claim 1, characterized in that: The system also includes a frame (46), a raw water tank, a produced water tank and a concentrated water tank are installed at the bottom of the left side of the frame, a first reverse osmosis membrane device, a second reverse osmosis membrane device, a third reverse osmosis membrane device and a fourth reverse osmosis membrane device are installed in the middle of the left side, a raw water pump is installed at the bottom of the right side of the frame, and an electric control cabinet (47) is installed in the middle of the right side, and the electric control device is installed in the electric control cabinet.

Images