Reverse osmosis system

Abstract

This utility model belongs to the technical field of water treatment equipment and discloses a reverse osmosis system, including a raw water device and a reverse osmosis device. The reverse osmosis device includes a reverse osmosis membrane housing, a central product water pipe, and membrane elements. The central product water pipe is axially disposed within the reverse osmosis membrane housing, and the membrane elements are disposed around the periphery of the central product water pipe. A first inlet and a first concentrate outlet are provided on one axial side of the reverse osmosis membrane housing, and a second inlet and a second concentrate outlet are provided on the other axial side. A product water outlet is provided at the axial end of the central product water pipe. The first inlet and the second inlet are alternately connected to the raw water device. When water enters through the first inlet, concentrate can flow out through the second concentrate outlet; conversely, when water enters through the second inlet, concentrate can flow out through the first concentrate outlet. This reverse osmosis system can reduce fouling, extend the cleaning cycle, and extend the operating time and service life.

Description

Technical Field

[0001] This utility model relates to the field of water treatment equipment technology, and in particular to a reverse osmosis system. Background Technology

[0002] Osmosis is the process by which a solvent moves across a semipermeable membrane from the side with a lower solute concentration to the side with a higher solute concentration. In reverse osmosis, pressure exceeding the osmotic pressure is applied to the side of the semipermeable membrane facing the higher solute concentration, thereby restoring the energy balance of the osmotic system. This causes a net diffusion of solvent particles from high concentration to low concentration across the entire semipermeable membrane, increasing the solvent concentration on the pressurized side of the membrane. Reverse osmosis is frequently used for water purification or desalination. In these processes, the reverse osmosis system produces purified permeate and a highly concentrated concentrate. The concentrate remains on the pressurized side of the semipermeable membrane, while the permeate is removed from the other side under low pressure.

[0003] With the application of membrane treatment technology in wastewater treatment, the fouling cycle of membrane devices has been significantly shortened, while the amount of chemical cleaning work has increased dramatically, seriously affecting work efficiency. Secondly, membrane device cleaning involves strong acids and alkalis, posing safety hazards, requiring highly skilled operators, and consuming a large amount of manual labor.

[0004] Therefore, a reverse osmosis system is urgently needed to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a reverse osmosis system that can reduce fouling, extend cleaning cycles, and extend operating time and service life.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] Reverse osmosis systems include:

[0008] Raw water system;

[0009] A reverse osmosis device includes a reverse osmosis membrane housing, a central permeate pipe, and membrane elements. The central permeate pipe is axially disposed in the reverse osmosis membrane housing, and the membrane elements are disposed around the central permeate pipe. A first inlet and a first concentrate outlet are provided on one axial side of the reverse osmosis membrane housing, and a second inlet and a second concentrate outlet are provided on the other axial side of the reverse osmosis membrane housing. A permeate outlet is provided at the axial end of the central permeate pipe.

[0010] The first water inlet and the second water inlet are alternately connected to the raw water device. When water enters through the first water inlet, the second concentrated water outlet can supply concentrated water to flow out; when water enters through the second water inlet, the first concentrated water outlet can supply concentrated water to flow out.

[0011] As a preferred embodiment of the reverse osmosis system provided by this utility model, the reverse osmosis device further includes an inlet pipe, which is connected to the raw water device and to the first inlet and the second inlet. The inlet pipe is selectively connected to the first inlet through a first inlet switching valve, and selectively connected to the second inlet through a second inlet switching valve.

[0012] As a preferred embodiment of the reverse osmosis system provided by this utility model, the reverse osmosis system further includes a reverse osmosis permeate collection tank and a permeate pipeline, wherein the reverse osmosis permeate collection tank is connected to the permeate outlet through the permeate pipeline.

[0013] As a preferred embodiment of the reverse osmosis system provided by this utility model, the reverse osmosis system further includes a product water conductivity detection device, which is installed in the product water pipeline and configured to detect the conductivity of the product water.

[0014] As a preferred embodiment of the reverse osmosis system provided by this utility model, the reverse osmosis system further includes a reverse osmosis concentrate collection tank and a concentrate pipeline, wherein the reverse osmosis concentrate collection tank is connected to the concentrate pipeline, and the concentrate pipeline is connected to the first concentrate outlet and the second concentrate outlet.

[0015] As a preferred embodiment of the reverse osmosis system provided by this utility model, the reverse osmosis system further includes a booster pump, which is disposed between the raw water device and the reverse osmosis device and is configured to boost the pressure of the raw water.

[0016] As a preferred embodiment of the reverse osmosis system provided by this utility model, the reverse osmosis system further includes a feed water conductivity detection device, which is disposed between the raw water device and the reverse osmosis device and is configured to detect the conductivity of the raw water.

[0017] As a preferred embodiment of the reverse osmosis system provided by this utility model, the reverse osmosis system further includes a pre-filter, which is disposed between the raw water device and the reverse osmosis device and is configured to filter impurities in the raw water.

[0018] As a preferred embodiment of the reverse osmosis system provided by this utility model, the raw water device includes a raw water tank and a raw water pump. The raw water pump is disposed between the raw water tank and the reverse osmosis device and is configured to pump raw water into the first inlet or the second inlet.

[0019] As a preferred embodiment of the reverse osmosis system provided by this utility model, the reverse osmosis system further includes a control device, a portion of the raw water device being communicatively connected to the control device, and the control device being able to control the raw water device to supply water or stop supplying water; a portion of the reverse osmosis device being communicatively connected to the control device, and the control device being able to control the raw water device to be connected to one of the first inlet and the second inlet.

[0020] The beneficial effects of this utility model are:

[0021] The reverse osmosis system provided by this utility model includes a raw water device and a reverse osmosis device. The reverse osmosis device includes a reverse osmosis membrane housing, a central permeate pipe, and a membrane element. The central permeate pipe is axially disposed within the reverse osmosis membrane housing, and the membrane element is disposed around the periphery of the central permeate pipe. A first inlet and a first concentrate outlet are provided on one axial side of the reverse osmosis membrane housing, and a second inlet and a second concentrate outlet are provided on the other axial side. A permeate outlet is provided at the axial end of the central permeate pipe. The permeate produced after reverse osmosis treatment can flow out through the aforementioned permeate outlet. The first inlet and the second inlet are alternately connected to the raw water device. When water enters through the first inlet, the second concentrate outlet allows concentrate to flow out; conversely, when water enters through the second inlet, the first concentrate outlet allows concentrate to flow out. By alternating water intake through the first and second inlets and alternating water output through the first and second concentrate outlets, the water intake direction can be switched according to the operating cycle during use. Raw water and concentrate are used to flush the membrane element, washing away some of the trapped substances. This allows for simultaneous water production and cleaning, reducing fouling, extending the cleaning cycle, and prolonging the operating time and service life. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the reverse osmosis system provided in an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the reverse osmosis device provided in an embodiment of the present invention.

[0025] In the picture:

[0026] 100. Raw water system; 110. Raw water tank; 120. Raw water pump;

[0027] 200. Reverse osmosis unit; 210. Reverse osmosis membrane housing; 211. First inlet; 212. First concentrate outlet; 213. Second inlet; 214. Second concentrate outlet; 220. Central product water pipe; 221. Product water outlet; 230. Inlet pipe; 240. First inlet switching valve; 250. Second inlet switching valve;

[0028] 310. Reverse osmosis permeate collection tank; 320. Permeate pipeline;

[0029] 400. Product water conductivity testing device;

[0030] 510. Reverse osmosis concentrate collection tank; 520. Concentrate piping;

[0031] 600. Booster pump;

[0032] 700. Inlet water conductivity detection device;

[0033] 800. Pre-filter. Detailed Implementation

[0034] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0037] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0038] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are used only for the convenience of describing this utility model and for simplifying the description, 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. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0039] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connect," and "fix" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0040] 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.

[0041] In this embodiment, the term "and / or" is merely a description of the relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this invention, the character " / " generally indicates that the preceding and following associated objects have an "or" relationship.

[0042] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0043] Figure 1This diagram illustrates a reverse osmosis system provided in an embodiment of the present invention. Figure 2 A schematic diagram of a reverse osmosis apparatus provided in an embodiment of the present invention is shown. (Refer to...) Figure 1 and Figure 2 This embodiment provides a reverse osmosis system. The reverse osmosis system includes a raw water device 100 and a reverse osmosis device 200. The reverse osmosis device 200 includes a reverse osmosis membrane housing 210, a central permeate pipe 220, and membrane elements. The central permeate pipe 220 is axially disposed within the reverse osmosis membrane housing 210, and the membrane elements are disposed around the periphery of the central permeate pipe 220. A first inlet 211 and a first concentrate outlet 212 are provided on one axial side of the reverse osmosis membrane housing 210, and a second inlet 213 and a second concentrate outlet 214 are provided on the other axial side. A permeate outlet 221 is provided at the axial end of the central permeate pipe 220. Raw water entering the reverse osmosis membrane housing 210 through the first inlet 211 or the second inlet 213, and permeate flowing through the membrane elements into the central permeate pipe 220, can exit through the permeate outlet 221. In this embodiment, the membrane element can be a spiral wound composite membrane made of polyamide.

[0044] Specifically, a first sealing ring is provided at the end of the membrane element, and a second sealing ring is provided at the end of the reverse osmosis membrane housing 210. The first sealing ring can tightly abut against the second sealing ring to prevent leakage between the end of the reverse osmosis membrane housing 210 and the end of the membrane element. Thrust rings are provided at both ends of the reverse osmosis membrane housing 210, which can limit the end of the membrane element to ensure that the membrane element is reliably installed inside the reverse osmosis membrane housing 210 and prevent the membrane element from detaching from the reverse osmosis membrane housing 210.

[0045] Specifically, the first inlet 211 and the second inlet 213 are alternately connected to the raw water device 100. When water enters through the first inlet 211, the second concentrate outlet 214 can supply concentrate for outflow; when water enters through the second inlet 213, the first concentrate outlet 212 can supply concentrate for outflow. By alternating water intake through the first inlet 211 and the second inlet 213, and alternating water output through the first concentrate outlet 212 and the second concentrate outlet 214, the direction of water intake can be switched according to the operating cycle during use. The raw water and concentrate are used to flush the membrane element, washing away some of the retained substances on the membrane element. This achieves the technical effect of cleaning while producing water, reducing the degree of membrane element fouling, extending the cleaning cycle of the reverse osmosis device 200, and extending the operating time and service life of the reverse osmosis device 200.

[0046] More specifically, the raw water device 100 includes a raw water tank 110 and a raw water pump 120. The raw water pump 120 is disposed between the raw water tank 110 and the reverse osmosis device 200 and is configured to pump raw water into the first inlet 211 or the second inlet 213.

[0047] More specifically, the reverse osmosis system also includes a booster pump 600. The booster pump 600 is located between the raw water pump 120 and the reverse osmosis unit 200 and is configured to pressurize the raw water.

[0048] Preferably, the reverse osmosis system further includes a pre-filter 800, which is disposed between the raw water pump 120 and the booster pump 600 and is configured to filter impurities in the raw water. Specifically, the pre-filter 800 can be a security filter from the prior art, which is a precision filtration device in a water treatment system, mainly used to intercept suspended particles, colloids, and microorganisms in the range of 0.5-100μm, and can serve as a pre-protection device for precision equipment such as reverse osmosis membranes.

[0049] Continue to refer to Figure 1 The reverse osmosis device 200 also includes an inlet pipe 230. The inlet pipe 230 is connected to the outlet of the booster pump 600 and to the first inlet 211 and the second inlet 213. The inlet pipe 230 is selectively connected to the first inlet 211 via a first inlet switching valve 240, and selectively connected to the second inlet 213 via a second inlet switching valve 250. In this embodiment, both the first inlet switching valve 240 and the second inlet switching valve 250 can be selected as solenoid valves, etc.

[0050] Specifically, the reverse osmosis system also includes a reverse osmosis permeate collection tank 310 and a permeate pipeline 320. The reverse osmosis permeate collection tank 310 is connected to the permeate outlet 221 via the permeate pipeline 320. Permeate in the central permeate pipeline 220 can enter the reverse osmosis permeate collection tank 310 for collection via the permeate pipeline 320.

[0051] More specifically, the reverse osmosis system also includes a reverse osmosis concentrate collection tank 510 and a concentrate pipeline 520. The reverse osmosis concentrate collection tank 510 is connected to the concentrate pipeline 520, which connects to the first concentrate outlet 212 and the second concentrate outlet 214. In an embodiment, concentrate discharge valves can be respectively installed at the first concentrate outlet 212 and the second concentrate outlet 214. When the concentrate discharge valve is opened, concentrate can enter the concentrate pipeline 520 from either the first concentrate outlet 212 or the second concentrate outlet 214. The aforementioned one-way valve can specifically be a solenoid valve from the prior art for automatic control.

[0052] Optionally, in this embodiment, the reverse osmosis system further includes a control device. The raw water pump 120 is communicatively connected to the control device, which can control the stopping or starting of the raw water pump to control the supply or cessation of water supply to the raw water device 100. The first inlet switching valve 240 and the second inlet switching valve 250 are respectively communicatively connected to the control device, which can control the opening and closing of the first inlet switching valve 240 and the second inlet switching valve 250, so that the raw water device 100 is connected to one of the first inlet 211 and the second inlet 213. In this embodiment, the control device can specifically be a PLC controller or similar device from the prior art; its structure and principle will not be described in detail here.

[0053] Continue to refer to Figure 1 The reverse osmosis system also includes a feed water conductivity detection device 700. This device 700 is located between the raw water unit 100 and the reverse osmosis unit 200 and is configured to detect the conductivity of the raw water. The feed water conductivity detection device 700 is communicatively connected to the control device and can transmit the raw water conductivity signal to the control device. The raw water conductivity reflects the ion concentration of the raw water, thus reflecting the water quality status and providing data support for pretreatment effectiveness. Real-time data on the raw water conductivity allows for determination of whether the pretreatment process needs adjustment (such as adjusting the feed water conductivity to a standard range) to ensure the treatment efficiency of the reverse osmosis system. Furthermore, the raw water conductivity is a key reference for evaluating the desalination rate of the reverse osmosis system.

[0054] Furthermore, the reverse osmosis system also includes a permeate conductivity detection device 400. This device 400 is installed in the permeate pipeline 320 and configured to detect the conductivity of the permeate. The permeate conductivity detection device 400 is communicatively connected to the control device and can transmit the permeate conductivity signal to the control device. The permeate conductivity directly measures the purity of the permeate, ensuring that it meets water quality standards.

[0055] When the conductivity of the permeate water increases abnormally, the control device will trigger an alarm and assist in fault diagnosis. For example, it will remind operators to check whether the membrane elements are aging, whether the influent water is contaminated, or whether the permeate water conductivity detection device 400 is malfunctioning, which may cause a decrease in the desalination rate.

[0056] The aforementioned control device can also switch the feed water direction of the reverse osmosis unit 200 based on the permeate conductivity signal, that is, control the alternating opening and closing of the first feed water switching valve 240 and the second feed water switching valve 250. For example, when the designed permeate conductivity is <8μS / cm, but the actual permeate conductivity is 6.5μS / cm, the feed water direction is automatically switched once every time the permeate conductivity detected by the permeate conductivity detection device 400 increases by a preset change value, using raw water and concentrate to flush the membrane element. In this embodiment, the preset change value can specifically be 0.3μS / cm.

[0057] The reverse osmosis system provided in this embodiment includes a manual control mode and an automatic control mode.

[0058] In manual control mode, after the reverse osmosis system has been running for a period of time with water fed through the first inlet 211, the operator uses the control device to close the first inlet switching valve 240 and open the second inlet switching valve 250 according to the operating cycle, and the reverse osmosis system continues to operate.

[0059] In automatic control mode, after the reverse osmosis system has been running for a period of time with water fed through the first inlet 211, the control device determines whether the change in the conductivity of the product water has reached the preset change value based on the product water conductivity signal. If the change in the conductivity of the product water has reached the preset change value, the control device automatically controls the first inlet water switching valve 240 to close and opens the second inlet water switching valve 250, and the reverse osmosis system continues to operate.

[0060] 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 system, characterized in that, include: Raw water unit (100); A reverse osmosis device (200) includes a reverse osmosis membrane housing (210), a central permeate pipe (220), and membrane elements. The central permeate pipe (220) is axially disposed in the reverse osmosis membrane housing (210), and the membrane elements are disposed around the central permeate pipe (220). A first inlet (211) and a first concentrate outlet (212) are provided on one side of the reverse osmosis membrane housing (210) along the axial direction, and a second inlet (213) and a second concentrate outlet (214) are provided on the other side of the reverse osmosis membrane housing (210) along the axial direction. A permeate outlet (221) is provided at the end of the central permeate pipe (220) along the axial direction. The first water inlet (211) and the second water inlet (213) are alternately connected to the raw water device (100). When water enters through the first water inlet (211), the second concentrated water outlet (214) can supply concentrated water to flow out. When water enters through the second water inlet (213), the first concentrated water outlet (212) can supply concentrated water to flow out.

2. The reverse osmosis system according to claim 1, characterized in that, The reverse osmosis device (200) further includes an inlet pipe (230), which is connected to the raw water device (100) and to the first inlet (211) and the second inlet (213). The inlet pipe (230) is selectively connected to the first inlet (211) through a first inlet switching valve (240), and the inlet pipe (230) is selectively connected to the second inlet (213) through a second inlet switching valve (250).

3. The reverse osmosis system according to claim 1, characterized in that, The reverse osmosis system also includes a reverse osmosis permeate collection tank (310) and a permeate pipeline (320), wherein the reverse osmosis permeate collection tank (310) is connected to the permeate outlet (221) through the permeate pipeline (320).

4. The reverse osmosis system according to claim 3, characterized in that, The reverse osmosis system also includes a permeate conductivity detection device (400), which is disposed in the permeate pipeline (320) and configured to detect the conductivity of the permeate.

5. The reverse osmosis system according to claim 1, characterized in that, The reverse osmosis system also includes a reverse osmosis concentrate collection tank (510) and a concentrate pipeline (520). The reverse osmosis concentrate collection tank (510) is connected to the concentrate pipeline (520), and the concentrate pipeline (520) is connected to the first concentrate outlet (212) and the second concentrate outlet (214).

6. The reverse osmosis system according to claim 1, characterized in that, The reverse osmosis system also includes a booster pump (600), which is located between the raw water device (100) and the reverse osmosis device (200) and is configured to pressurize the raw water.

7. The reverse osmosis system according to claim 1, characterized in that, The reverse osmosis system also includes a feed water conductivity detection device (700), which is disposed between the raw water device (100) and the reverse osmosis device (200) and is configured to detect the conductivity of the raw water.

8. The reverse osmosis system according to claim 1, characterized in that, The reverse osmosis system also includes a pre-filter (800), which is disposed between the raw water device (100) and the reverse osmosis device (200) and is configured to filter impurities in the raw water.

9. The reverse osmosis system according to claim 1, characterized in that, The raw water device (100) includes a raw water tank (110) and a raw water pump (120). The raw water pump (120) is located between the raw water tank (110) and the reverse osmosis device (200) and is configured to pump raw water into the first inlet (211) or the second inlet (213).

10. The reverse osmosis system according to any one of claims 1-9, characterized in that, The reverse osmosis system also includes a control device, a portion of the raw water device (100) is communicatively connected to the control device, and the control device is capable of controlling the raw water device (100) to supply water or stop supplying water; a portion of the reverse osmosis device (200) is communicatively connected to the control device, and the control device is capable of controlling the raw water device (100) to be connected to one of the first inlet (211) and the second inlet (213).

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