A reverse osmosis membrane cleaning device

Abstract

The utility model discloses a kind of reverse osmosis membrane cleaning devices, belong to reverse osmosis membrane cleaning field, including flushing box and scrubbing box, first accommodating groove for placing reverse osmosis membrane is opened in flushing box, second accommodating groove for placing reverse osmosis membrane is opened in scrubbing box, flushing assembly is equipped on flushing box, mounting rod is further provided in first accommodating groove, mounting rod can be inserted into reverse osmosis membrane, driving assembly and scrubbing assembly are further provided on scrubbing box, driving assembly can be connected with reverse osmosis membrane for driving reverse osmosis membrane rotates along mounting rod axial direction, scrubbing assembly can be abutted to reverse osmosis membrane for the scrubbing of reverse osmosis membrane outer surface, so set, by the scrubbing assembly of being set, synchronous scrubbing can be carried out in the process of washing reverse osmosis membrane, the falling speed of stain on reverse osmosis membrane is accelerated, the washing efficiency of reverse osmosis membrane is improved, and the probability of still existing residual stain phenomenon caused by pure flushing is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of reverse osmosis membrane cleaning, and specifically relates to a reverse osmosis membrane cleaning device. Background Technology

[0002] A reverse osmosis membrane is an artificial semi-permeable membrane with specific properties, mimicking a biological semi-permeable membrane. It is the core component of reverse osmosis technology. The principle of reverse osmosis is that, under pressure higher than the osmotic pressure of the solution, other substances cannot pass through the semi-permeable membrane, thus separating them from water.

[0003] In practical use, reverse osmosis membranes are subject to various contaminants, such as microorganisms, oxides, and corrosive substances. Regular cleaning can effectively prevent membrane fouling. If cleaning is not performed for a long time, the surface fouling of the membrane will become increasingly serious. When it reaches a certain point, the membrane needs to be replaced, which increases maintenance costs. Regular cleaning can prevent this from happening, save costs, and extend service life. In summary, cleaning reverse osmosis membranes is of great significance for maintaining water quality stability, increasing water production, and reducing maintenance costs.

[0004] In existing technologies, reverse osmosis membrane cleaning devices often use cleaning water to rinse the reverse osmosis membrane from the inside or outside. However, in the actual rinsing process of reverse osmosis membranes, it has been found that rinsing off the stains on the surface of the reverse osmosis membrane is time-consuming, and there are still residual stains on the surface of the reverse osmosis membrane after rinsing, resulting in poor cleaning effect. Utility Model Content

[0005] This invention addresses the problems in the prior art by providing a reverse osmosis membrane cleaning device, which solves the problems of long cleaning time and poor cleaning effect caused by simply rinsing in the process of cleaning reverse osmosis membranes in the prior art.

[0006] The technical solution adopted in this utility model is as follows: This application provides a reverse osmosis membrane cleaning device, including a rinsing box and a brushing box. The rinsing box has a first receiving groove for placing the reverse osmosis membrane, and the brushing box has a second receiving groove for placing the reverse osmosis membrane. The rinsing box is provided with a rinsing assembly for rinsing the reverse osmosis membrane. An installation rod is also provided in the first receiving groove. The installation rod can be inserted into the reverse osmosis membrane for radial fixation of the reverse osmosis membrane. The brushing box is also provided with a driving assembly and a brushing assembly. The driving assembly can be connected to the reverse osmosis membrane for driving the reverse osmosis membrane to rotate axially along the installation rod. The brushing assembly can abut against the reverse osmosis membrane for brushing the outer surface of the reverse osmosis membrane.

[0007] Preferably, the rinsing assembly includes a first rinsing unit and a second rinsing unit. The first rinsing unit has a plurality of first rinsing holes, which are opened on the first receiving groove. The mounting rod is hollow inside and can communicate with the cleaning water. The second rinsing unit has a plurality of second rinsing holes, which are disposed on the mounting rod.

[0008] Preferably, a plurality of first flushing holes are evenly distributed on the first receiving groove, and a plurality of second flushing holes are evenly distributed on the mounting rod.

[0009] Preferably, the drive assembly includes a motor mounted on the washing box, a reducer connected to the output shaft of the motor, a transmission rod connected to the output shaft of the reducer, and a drive wheel mounted on the transmission rod, wherein at least a portion of the drive wheel protrudes from the second receiving groove and is capable of contacting the reverse osmosis membrane.

[0010] Preferably, the transmission rod is provided with several drive wheels.

[0011] Preferably, the scrubbing assembly includes a mounting groove formed on the second receiving groove, and the mounting groove is provided with bristles that can abut against the reverse osmosis membrane.

[0012] Preferably, the scrubbing assembly further includes an elastic element disposed between the second receiving groove and the mounting groove.

[0013] Preferably, the elastic element can be one of a sheet, an elastic pad, or a spring.

[0014] As can be seen from the above technical solutions, this utility model has the following advantages: the brushing component can be used to brush the reverse osmosis membrane simultaneously during the cleaning process, which accelerates the removal speed of dirt on the reverse osmosis membrane, improves the cleaning efficiency of the reverse osmosis membrane, and reduces the probability of residual dirt remaining due to simple rinsing. Attached Figure Description

[0015] To more clearly illustrate the technical solution of this utility model, the drawings used in the description 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 these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the cleaning device in a specific embodiment of the present invention.

[0017] Figure 2 This is a partial structural schematic diagram of the cleaning device in a specific embodiment of the present invention.

[0018] The components are: 1. Rinse box; 2. Brush box; 3. First receiving slot; 4. Second receiving slot; 5. Mounting rod; 6. First rinsing hole; 7. Second rinsing hole; 8. Motor; 9. Reducer; 10. Transmission rod; 11. Drive wheel; 12. Mounting slot; 13. Brush bristles; 14. Elastic pad. Detailed Implementation

[0019] Various embodiments of this disclosure will be described more fully in the following detailed description. This disclosure may have various embodiments, and adjustments and changes may be made therein. However, it should be understood that there is no intention to limit the various embodiments of this disclosure to the specific embodiments disclosed herein, but rather this disclosure should be understood to cover all adjustments, equivalents, and / or alternatives falling within the spirit and scope of the various embodiments of this disclosure.

[0020] Example: like Figures 1-2 As shown, this embodiment provides a reverse osmosis membrane cleaning device, including a rinsing box 1 and a brushing box 2. The rinsing box 1 has a first receiving groove 3 for placing the reverse osmosis membrane, and the brushing box 2 has a second receiving groove 4 for placing the reverse osmosis membrane. The rinsing box 1 is equipped with a rinsing assembly for rinsing the reverse osmosis membrane. The first receiving groove 3 is also provided with an installation rod 5, which can be inserted into the reverse osmosis membrane for radial fixation. The brushing box 2 is also equipped with a driving assembly and a brushing assembly. The driving assembly can be connected to the reverse osmosis membrane to drive the reverse osmosis membrane to rotate axially along the installation rod 5. The brushing assembly can abut against the reverse osmosis membrane for brushing the outer surface of the reverse osmosis membrane. With this configuration, the brushing assembly can simultaneously brush the reverse osmosis membrane during the cleaning process, accelerating the removal speed of dirt on the reverse osmosis membrane, improving the cleaning efficiency of the reverse osmosis membrane, and reducing the probability of residual dirt remaining due to simple rinsing.

[0021] Additional Explanation: The cleaning process of this device is preferably carried out in two stages. First, the reverse osmosis membrane element to be cleaned is placed in the rinsing box 1, and the internal channels and outer surface of the membrane are thoroughly pre-treated by water flow rinsing through the rinsing assembly. Then, the membrane element is moved to the brushing box 2, where the drive assembly rotates it along the mounting rod 5, and the membrane surface is mechanically brushed by the brushing assembly. This design ensures that the reverse osmosis membrane undergoes both hydraulic rinsing to remove loose dirt and simultaneous brushing to accelerate the removal of stubborn stains, thereby efficiently restoring membrane performance. The structure and materials of the brushing assembly are specially designed to enhance the cleaning effect while avoiding damage to the membrane. Specifically, the brushing assembly uses soft bristles 13 in conjunction with an elastic support mechanism, making the pressure of the bristles 13 on the membrane surface controllable and preventing scratches. In an improved design, a non-contact vibration cleaning mechanism (such as an ultrasonic vibrator) can be added, using high-frequency micro-vibration to remove dirt adhering to the membrane surface without the bristles 13 directly contacting the membrane surface, thus further ensuring that the membrane structure is not mechanically damaged during the cleaning process.

[0022] In this embodiment, the rinsing assembly includes a first rinsing unit and a second rinsing unit. The first rinsing unit consists of several first rinsing holes 6, which are formed on the first receiving groove 3. The mounting rod 5 is hollow inside and can communicate with the cleaning water. The second rinsing unit consists of several second rinsing holes 7, which are disposed on the mounting rod 5. In this embodiment, the several first rinsing holes 6 are evenly distributed on the first receiving groove 3, and the several second rinsing holes 7 are evenly distributed on the mounting rod 5. With this arrangement, the first rinsing holes 6 and the second rinsing holes 7 can ensure that both the inside and outside of the reverse osmosis membrane can be rinsed and cleaned during the rinsing process, thereby improving the cleaning effect of the cleaning device.

[0023] The flushing water pressure and flow rate of the flushing assembly can be adjusted according to the degree of membrane fouling. It is preferable to increase the flushing water flow rate during cleaning (e.g., to 2-3 times the normal operating flow rate) and control the flushing pressure at approximately 0.2–0.4 MPa to provide sufficient flushing force without damaging the membrane. The flushing process can last from several minutes to tens of minutes until most of the detachable contaminants on the membrane surface are removed. Simultaneous spraying of water from both inside and outside the first flushing port 6 and the second flushing port 7 ensures that the cleaning solution evenly covers the internal channels and external surface of the reverse osmosis membrane element, achieving comprehensive flushing. Furthermore, appropriate chemical cleaning agents can be added to the flushing water to enhance the effect depending on the type of fouling: for example, for inorganic salt scaling fouling, a suitable amount of weak acid (such as citric acid or dilute hydrochloric acid) can be added to the flushing water to dissolve the scale; for organic fouling, alkaline cleaning agents or surfactants can be added to help decompose organic contaminants; for microbial slime fouling, low concentrations of bactericides (such as quaternary ammonium salt disinfectant or peroxide) can be added for circulating flushing to kill microorganisms. Through these measures, the rinsing unit can provide targeted cleaning based on different levels of contamination, improving cleaning effectiveness while avoiding adverse effects on the membrane caused by over-rinsing or improper use of chemicals.

[0024] In this embodiment, the drive assembly includes a motor 8 mounted on the brush box 2, a reducer 9 connected to the output shaft of the motor 8, a transmission rod 10 connected to the output shaft of the reducer 9, and a drive wheel 11 mounted on the transmission rod 10. At least a portion of the drive wheel 11 protrudes from the second receiving groove 4 and is able to abut against the reverse osmosis membrane.

[0025] The motor 8 in the drive assembly, through the reducer 9, provides controllable rotational speed and torque, thereby driving the reverse osmosis membrane element to rotate slowly and evenly. During cleaning, the motor 8 speed should be set low to ensure the membrane element rotates smoothly in the brush box 2, guaranteeing that the bristles 13 thoroughly and gently clean the membrane surface, avoiding excessive friction or vibration caused by excessively fast rotation. If necessary, the drive assembly can also achieve intermittent rotation or alternating forward and reverse rotation through the control system to enhance the removal effect on stubborn dirt. The contact area between the drive wheel 11 and the outer surface of the membrane element is made of an elastic material (such as rubber), increasing friction while providing a cushioning effect to prevent indentation or damage to the outer layer of the membrane element. During the drive process, multiple drive wheels 11 work together to ensure balanced force on the membrane element, preventing slippage and free rotation, thus ensuring the membrane rotates in a stable posture during cleaning.

[0026] The transmission rod 10 is provided with a number of drive wheels 11, and in this embodiment there are two drive wheels 11.

[0027] In this embodiment, two drive wheels 11 are preferably symmetrically distributed to clamp and rotate the reverse osmosis membrane element. The dual drive wheel design ensures that the membrane element is subjected to uniform force and runs smoothly during rotation, avoiding uneven rotation or membrane element wobbling that may occur with only one drive wheel 11 on one side. Through the synergistic action of the two drive wheels 11, the membrane element will not skew or slip during axial rotation, thereby ensuring that the cleaning assembly can continuously and reliably adhere to the membrane surface for cleaning.

[0028] The brushing assembly includes a mounting groove 12 formed on the second receiving groove 4. The mounting groove 12 is provided with brush bristles 13, which can abut against the reverse osmosis membrane. In this embodiment, the mounting groove 12 is a mounting plate. The brush bristles 13 are evenly distributed and attached to the mounting plate. In this embodiment, the brush bristles 13 and the mounting plate are connected by Velcro, which facilitates the quick disassembly and replacement of the brush bristles 13.

[0029] The bristles 13 of the brushing assembly are preferably made of soft and resilient materials, such as soft nylon bristles or polyurethane sponge, to ensure that they do not scratch or abrade the reverse osmosis membrane surface while removing fouling. The length and density of the bristles 13 can be selected as needed: a moderate length allows for sufficient contact with the membrane surface while maintaining a certain degree of softness, and an appropriate density provides sufficient brushing coverage without generating excessive resistance. The bristle 13 assembly is secured to the mounting slot 12 using Velcro (hook and loop fasteners), allowing operators to quickly disassemble and replace different types of bristles 13 according to the degree of fouling. For example, for severe inorganic fouling, slightly stiffer bristles 13 can be used to enhance mechanical cleaning power; while for slight fouling or a delicate membrane surface, softer bristles 13 can be used to avoid unnecessary wear. This replaceable soft brush assembly design allows the device to flexibly select the bristle material and hardness for different types of fouling, further improving cleaning effectiveness and safety.

[0030] In this embodiment, the brushing assembly also includes an elastic element, which is disposed between the second receiving groove 4 and the mounting groove 12. This arrangement allows the elastic element to adapt to the size errors of different reverse osmosis membranes, while ensuring that the brush bristles 13 can firmly contact the reverse osmosis membrane.

[0031] The introduction of the elastic element ensures that the contact pressure between the bristles 13 and the membrane surface remains within a suitable range. The elastic element provides a certain degree of elastic support between the mounting groove 12 and the wall of the washing box 2. When membrane elements of different diameters or with slight deformation are placed into the washing box 2, the bristle 13 assembly can automatically adjust its position to fit the membrane surface, thus accommodating dimensional errors of the reverse osmosis membrane elements. More importantly, the elastic element limits the maximum force exerted by the bristles 13 on the membrane surface: once the reaction force on the bristles 13 exceeds the elastic force of the elastic element, the bristle 13 assembly will retract to buffer, preventing excessive pressure on the membrane. This ensures that the bristles 13 always gently press against the membrane surface during washing, effectively removing dirt without damaging the membrane's separation layer due to excessive pressure. By adjusting the material and structural parameters of the elastic element, the washing force can be further controlled. For example, if a spring is used as the elastic element, the clamping force of the brush bristles 13 can be adjusted by changing the pre-compression or stiffness of the spring; if a rubber elastic pad 14 is used, the brushing pressure can be changed by replacing the pad with one of different hardness or thickness. This constitutes an adjustable pressure brushing mechanism, allowing operators to optimize the brushing pressure according to the membrane fouling situation and the membrane material's tolerance. For extremely sensitive membrane modules, the pressure of the brush bristles 13 can be adjusted to a lower level, or even non-contact ultrasonic vibration cleaning can be used instead of mechanical brushing, thereby ensuring the cleaning effect while maximizing the protection of the membrane element from any mechanical damage.

[0032] The elastic element can be one of a spring sheet, an elastic pad 14, or a spring. In this embodiment, the elastic element is an elastic pad 14 made of rubber.

[0033] In this embodiment, a rubber elastic pad 14 is selected as the elastic element, mainly because rubber pads have advantages such as simple structure, moderate elasticity, and water and corrosion resistance. The thickness and hardness of the rubber elastic pad 14 can be selected as needed to provide appropriate support and cushioning performance, thereby making the contact between the brush bristles 13 and the membrane surface more stable and gentle. Compared with metal springs, rubber pads do not have the risk of rusting, are easy to maintain in long-term use, and can avoid the vibration or noise that may be generated by metal springs. In other embodiments, the elastic element can also be in the form of a spring sheet or a coil spring. If a spring is used, the required brushing pressure can be obtained by selecting the spring force coefficient or adjusting its preload; if a metal spring sheet is used, its elastic strength can be adjusted by changing the thickness or material of the spring sheet. Regardless of the form of elastic element used, the purpose is to ensure that the pressure applied to the membrane by the brushing assembly is controllable and safe, maintaining the brushing effect while extending the service life of the membrane element.

[0034] The above description is merely a preferred embodiment of one or more embodiments of this specification and is not intended to limit the scope of one or more embodiments of this specification. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of one or more embodiments of this specification should be included within the protection scope of one or more embodiments of this specification.

Claims

1. A reverse osmosis membrane cleaning device, characterized in that, The device includes a rinsing box (1) and a brushing box (2). The rinsing box (1) has a first receiving groove (3) for placing the reverse osmosis membrane, and the brushing box (2) has a second receiving groove (4) for placing the reverse osmosis membrane. The rinsing box (1) is equipped with a rinsing assembly for rinsing the reverse osmosis membrane. The first receiving groove (3) is also equipped with an installation rod (5), which can be inserted into the reverse osmosis membrane for radial fixation. The brushing box (2) is also equipped with a driving assembly and a brushing assembly. The driving assembly can be connected to the reverse osmosis membrane for driving the reverse osmosis membrane to rotate axially along the installation rod (5). The brushing assembly can abut against the reverse osmosis membrane for brushing the outer surface of the reverse osmosis membrane.

2. The reverse osmosis membrane cleaning device according to claim 1, characterized in that, The rinsing assembly includes a first rinsing unit and a second rinsing unit. The first rinsing unit consists of several first rinsing holes (6), which are opened on the first receiving groove (3). The mounting rod (5) is hollow inside and can communicate with the cleaning water. The second rinsing unit consists of several second rinsing holes (7), which are set on the mounting rod (5).

3. The reverse osmosis membrane cleaning device according to claim 2, characterized in that, Several first flushing holes (6) are evenly distributed on the first receiving groove (3), and several second flushing holes (7) are evenly distributed on the mounting rod (5).

4. The reverse osmosis membrane cleaning device according to claim 1, characterized in that, The drive assembly includes a motor (8) mounted on the brush box (2), a reducer (9) connected to the output shaft of the motor (8), a transmission rod (10) connected to the output shaft of the reducer (9), and a drive wheel (11) mounted on the transmission rod (10). At least a portion of the drive wheel (11) protrudes from the second receiving groove (4) and is able to abut against the reverse osmosis membrane.

5. The reverse osmosis membrane cleaning device according to claim 4, characterized in that, Several drive wheels (11) are provided on the transmission rod (10).

6. The reverse osmosis membrane cleaning device according to claim 1, characterized in that, The scrubbing assembly includes a mounting groove (12) provided on the second receiving groove (4), and brush bristles (13) provided on the mounting groove (12) so that the brush bristles (13) can come into contact with the reverse osmosis membrane.

7. The reverse osmosis membrane cleaning device according to claim 6, characterized in that, The scrubbing assembly also includes an elastic element disposed between the second receiving groove (4) and the mounting groove (12).

8. The reverse osmosis membrane cleaning device according to claim 7, characterized in that, The elastic element can be a spring, an elastic pad (14), or a spring.

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