Reverse osmosis chemical cleaning device

Abstract

The utility model relates to the technical field of reverse osmosis membrane cleaning, and provides a reverse osmosis chemical cleaning device, which comprises a liquid inlet pipeline, a branch two, a liquid outlet pipeline and membrane assembly one and membrane assembly two. Wherein, the liquid inlet pipeline serves as a supply channel of cleaning liquid, can deliver the cleaning liquid to the membrane assembly one and the membrane assembly two, and provides the required liquid for the cleaning process of both. The branch two plays a connecting and flow guiding role in the device, one end of the branch two is connected with the water outlet end of the membrane assembly one and the water inlet end of the membrane assembly two at the same time, and forms a key node of cleaning liquid flow. The liquid outlet pipeline is connected with the water outlet end of the branch two and the membrane assembly two respectively, and constitutes a discharge path of the cleaning liquid. Through the above technical scheme, the number of pipelines and valves is reduced, and the problems of high cost and complex structure caused by excessive pipeline and valve setting in the prior art are solved.

Description

Technical Field

[0001] The embodiments of this utility model relate to the field of reverse osmosis membrane cleaning technology, specifically, to a reverse osmosis chemical cleaning device. Background Technology

[0002] During the operation of a reverse osmosis system, membrane modules will experience performance degradation due to contaminant deposition after prolonged use, thus requiring regular chemical cleaning. Current cleaning devices typically deliver cleaning solution to the membrane modules through a single pipeline, making it difficult to control the flow of the cleaning solution when cleaning multiple membrane modules connected in series or parallel.

[0003] Using separate pipelines to clean each membrane module would increase equipment complexity and cost; using the same pipeline for sequential cleaning would cause the cleaning solution composition to change after passing through upstream membrane modules, potentially affecting the cleaning effect on downstream membrane modules. Furthermore, the discharge and flow path switching of the cleaning solution in existing equipment is not convenient enough, easily leading to cleaning solution stagnation or uneven distribution, resulting in reduced cleaning efficiency and failing to meet the differentiated cleaning needs of different membrane modules. Utility Model Content

[0004] To overcome the above-mentioned defects, embodiments of this utility model provide a reverse osmosis chemical cleaning device, which solves the problems of high cost and complex structure caused by excessive pipelines and valves in the prior art.

[0005] According to one aspect, at least one embodiment of the present invention provides a reverse osmosis chemical cleaning apparatus, comprising:

[0006] A liquid inlet pipe, which is used to supply cleaning fluid to membrane module one and membrane module two;

[0007] Branch line two, one end of which is connected to the water outlet of membrane module one and the water inlet of membrane module two.

[0008] The liquid outlet pipe connects the second branch and the water outlet end of the second membrane module;

[0009] The cleaning fluid flowing through membrane module one can be output to the outlet pipe through branch two, or the cleaning fluid can flow into membrane module two through branch two.

[0010] For example, in a reverse osmosis chemical cleaning device provided in at least one embodiment of the present invention, a branch line is further included, wherein the water inlet end of the branch line is connected to the liquid inlet pipe, and the water outlet end of the branch line is connected to the water inlet end of the membrane module.

[0011] Branch line three, the inlet of which is connected to the outlet of membrane module two, and the outlet of membrane module two is connected to the liquid outlet pipe via branch line three.

[0012] For example, in a reverse osmosis chemical cleaning device provided in at least one embodiment of the present invention, the outlet end of the membrane module one is connected to the inlet end of the membrane module two by a pipeline channel, one end of the branch line two is connected to the pipeline channel, and the branch line two is provided with a switching valve. The switching valve is used to control the opening and closing of the branch line two so that the liquid flowing out of the membrane module one is discharged through the branch line two or through the membrane module two.

[0013] For example, in a reverse osmosis chemical cleaning device provided in at least one embodiment of the present invention, the inlet pipe, the first branch, the first membrane module, the second branch, and the outlet pipe constitute a cleaning loop;

[0014] The inlet pipe, the second branch, the second membrane module, the third branch, and the outlet pipe constitute a two-stage cleaning circuit.

[0015] For example, in at least one embodiment of the present invention, a reverse osmosis chemical cleaning device further includes:

[0016] A water inlet valve is installed on the first branch, and the first water inlet valve is used to control the on / off state of the first branch;

[0017] A two-stage inlet valve is installed on the outlet pipe and located between branch one and branch two.

[0018] For example, in a reverse osmosis chemical cleaning device provided in at least one embodiment of the present invention, a water outlet valve is provided on the third branch, and the water outlet valve is used to control the on / off state of the third branch.

[0019] For example, in a reverse osmosis chemical cleaning device provided in at least one embodiment of the present invention, the liquid outlets of membrane module one and membrane module two are both connected to liquid outlet pipelines, and a low-point discharge valve is provided on the liquid outlet pipelines. The low-point discharge valve is used to discharge the liquid remaining in the liquid outlet pipelines.

[0020] For example, in a reverse osmosis chemical cleaning device provided in at least one embodiment of the present invention, both membrane module one and membrane module two include a plurality of permeate membrane unit units, wherein the permeate membrane unit units include:

[0021] A housing for accommodating a reverse osmosis membrane, the housing having an opening at its upper end, a circumferentially extending protrusion on the outer side wall of the opening, a positioning block at one end of the protrusion, and a groove on the side wall of the positioning block near the center of the housing.

[0022] An end cap is provided to seal the opening. The outer side wall of the end cap is provided with a second protrusion extending in the circumferential direction. A second positioning block is provided at one end of the second protrusion opposite to the first protrusion. A second groove is provided on the side wall of the second positioning block near the center of the housing.

[0023] After the end cap can be rotated, the first protrusion is inserted into the second groove, and the second protrusion is inserted into the first groove, so that the end cap and the housing are axially positioned.

[0024] For example, in at least one embodiment of the present invention, a reverse osmosis chemical cleaning device further includes a limiting component, which is used to limit the rotation of the end cap. The limiting component includes:

[0025] A rotating rod is rotatably mounted on the second protrusion, and a limiting block is provided at the end of the rotating rod;

[0026] A rotating plate is rotatably mounted on the side wall of the positioning block two near the rotating rod. A through hole is provided on the rotating plate. The rotating rod and the rotating plate are configured such that after the rotating plate rotates towards the side near the rotating rod, the limiting block can pass through the through hole. After the rotating rod rotates, the limiting block abuts against the rotating plate to restrict the rotation of the end cap.

[0027] For example, in a reverse osmosis chemical cleaning device provided in at least one embodiment of the present invention, the width of the limiting block is smaller than the width of the through hole, the length of the limiting block is greater than the width of the through hole, and the limiting block can pass through the through hole and rotate to squeeze the end face of the rotating plate.

[0028] The beneficial effects of the embodiments of this utility model are as follows:

[0029] In this invention, the connection structure between the inlet pipe, branch line two, and outlet pipe allows the cleaning fluid to switch flow directions between membrane module one and membrane module two. This structure reduces the number of pipes required, shortens the overall pipe length, and reduces the number of valves needed, thereby simplifying the overall pipeline structure and reducing equipment manufacturing costs.

[0030] In addition, due to the reduction in the number of pipes and valves, the connection between the pipes is clearer. When switching the direction of the cleaning fluid, there is no need for complicated operating procedures, which improves the convenience of operation and reduces the possibility of the cleaning effect being affected by operational errors. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this utility model and these drawings without any creative effort.

[0032] Figure 1 This is a schematic diagram of the structure of a reverse osmosis chemical cleaning device in one embodiment of the present invention;

[0033] Figure 2 for Figure 1 A schematic diagram of the shell structure in the embodiment;

[0034] Figure 3 for Figure 2 Enlarged structural diagram at point A;

[0035] Figure 4 for Figure 1 A schematic diagram of the end cap structure in the embodiment;

[0036] Figure 5 for Figure 4 Enlarged structural diagram at point B;

[0037] Figure 6 for Figure 1 A partial structural diagram of the permeation module unit in the embodiment;

[0038] Figure 7 for Figure 6 Enlarged structural diagram at point C;

[0039] Figure 8 for Figure 6 A schematic diagram of the structure in another state in the embodiment;

[0040] Figure 9 for Figure 8 Enlarged schematic diagram of the structure at point D.

[0041] In the diagram: 1. Inlet pipe, 2. Membrane module one, 3. Membrane module two, 4. Branch two, 5. Outlet pipe, 6. Branch one, 7. Branch three, 8. Pipeline channel, 9. Switching valve, 10. First-stage cleaning loop, 11. Second-stage cleaning loop, 12. First-stage inlet valve, 13. Second-stage inlet valve, 14. Outlet valve, 15. Outlet pipe, 16. Low-point discharge valve, 17. Reverse osmosis membrane unit, 171. Shell, 172. Reverse osmosis membrane, 173. Opening, 174. Protrusion one, 175. Positioning block one, 176. Groove one, 177. End cap, 178. Protrusion two, 179. Positioning block two, 180. Groove two, 181. Limiting component, 1811. Rotating rod, 1812. Limiting block, 1813. Rotating plate, 1814. Through hole. Detailed Implementation

[0042] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit its scope.

[0043] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0044] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0045] 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.

[0046] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to 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.

[0047] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0048] like Figures 1-9 As shown, it illustrates a reverse osmosis chemical cleaning device in one embodiment of the present invention.

[0049] like Figure 1 As shown, in some examples, one end of the inlet pipe 1 is connected to a cleaning solution storage device to provide cleaning solution to membrane module 2 and membrane module 3. Branch 2 4 is a tubular structure, with one end connected to the outlet of membrane module 2 and the inlet of membrane module 3, and the other end connected to the outlet pipe 5. The outlet pipe 5 is a collection pipe, with its end connected to a waste liquid collection device. If membrane module 2 needs to be cleaned separately, the cleaning solution flowing through membrane module 2 can be directly output to the outlet pipe 5 through branch 2 4, and finally flow to the collection end; if membrane module 3 needs to be cleaned, the cleaning solution can flow into membrane module 3 through branch 2 4, and after cleaning membrane module 3, it enters the outlet pipe 5 from the outlet of membrane module 3 and is discharged, realizing the cleaning control of different membrane modules and adapting to the chemical cleaning needs of reverse osmosis system membrane modules. Branch 2 4 can discharge the cleaning fluid from membrane module 1 2 or input the cleaning fluid into membrane module 2 3 without the need for additional piping to input the cleaning fluid into membrane module 2 3, thus reducing piping costs and simplifying the operation steps, reducing operational errors caused by complex piping.

[0050] Branch 6's inlet is connected to the inlet pipe 1, and its outlet is connected to the inlet of membrane module 2. Branch 3's 7 is an independent pipe, with its inlet connected to the outlet of membrane module 3 and its outlet connected to the outlet pipe 5. Branch 3's 7 is used to discharge the cleaning fluid flowing through membrane module 3 and to collect the cleaning fluid into the outlet pipe 5. A pipe channel 8 connects the outlet of membrane module 2 and the inlet of membrane module 3. One end of branch 2's 4 is connected to pipe channel 8, and branch 2's 4 is equipped with a switching valve 9. The switching valve 9 can control the opening and closing of branch 2's 4. If the switching valve 9 is open, branch 2's 4 is open, and the cleaning fluid flowing through membrane module 2 can enter the outlet pipe 5 through branch 2's 4. If the switching valve 9 is closed, branch 2's 4 is closed, and the liquid flowing through membrane module 2 flows through membrane module 3 and is discharged.

[0051] The inlet pipe 1, branch 6, membrane module 2, branch 4, and outlet pipe 5 form a cleaning loop 10; the inlet pipe 1, branch 4, membrane module 3, branch 7, and outlet pipe 5 form a two-stage cleaning loop 11. Branch 6 is equipped with an inlet valve 12, which controls the opening and closing of branch 6. Based on the actual cleaning conditions of membrane module 2, the valve can adjust whether the cleaning fluid enters membrane module 2, enabling independent and targeted cleaning of membrane module 2. The outlet pipe 5 is equipped with a second inlet valve 13, located between branch 6 and branch 4. The second inlet valve 13 works in conjunction with the first inlet valve 12 to regulate the distribution of the cleaning fluid in the two loops. When the first inlet valve 12 is closed and the second inlet valve 13 and switching valve 9 are opened, the cleaning fluid can only enter membrane module 3, cleaning only membrane module 3. The outlet valve 14 on branch line 3 7 is used to control the on / off state of branch line 3 7. The low-point discharge valve 16 is installed on the outlet pipeline 15 connecting the outlets of membrane module 1 2 and membrane module 2 3, and its installation position is lower than the outlet of the membrane module. Its function is to, after the cleaning operation is completed, open this valve to use gravity to completely discharge the residual cleaning fluid and any possible small amount of impurities in the outlet pipeline 15, preventing residual liquid from remaining in the pipeline.

[0052] When only membrane module 2 needs cleaning, the first inlet valve 12 is opened to keep branch 6 open, allowing the cleaning solution to flow into membrane module 2. The second inlet valve 13 is closed to prevent the cleaning solution from flowing from the outlet pipe 5 into the relevant passages of membrane module 3. At the same time, the outlet valve 14 is closed to prevent unnecessary liquid flow in the relevant circuits of membrane module 3. The cleaning solution flows out from the inlet pipe 1 and enters membrane module 2 through the opened branch 6. After cleaning is completed in membrane module 2, the cleaning solution carrying contaminants flows out from the outlet of membrane module 2, then enters branch 4, and finally flows into the outlet pipe 5 through branch 4. The outlet pipe 5 then transports the waste liquid to a subsequent treatment or collection device.

[0053] When cleaning only membrane module 2 (3), close the first-stage inlet valve 12 to cut off the flow of cleaning fluid into membrane module 1 (2); open the second-stage inlet valve 13 to allow the cleaning fluid in the outlet pipe 5 to flow into the cleaning circuit of membrane module 2 (3); open the switching valve 9 to ensure that the cleaning fluid can flow smoothly into membrane module 2 (3) from branch 2 (4); and simultaneously open the outlet valve 14 to ensure that the cleaned liquid from membrane module 2 (3) can be discharged smoothly. The cleaning fluid flows out from the inlet pipe 1, and part of it flows through branch 2 (4) into the inlet of membrane module 2 (3) with the switching valve 9 open, cleaning membrane module 2 (3). After cleaning, the cleaning fluid carrying impurities flows out from the outlet of membrane module 2 (3), enters the outlet pipe 5 through branch 3 (7), and is finally discharged to the designated location by the outlet pipe 5.

[0054] like Figures 2-9As shown, both membrane module 12 and membrane module 23 include several permeate membrane units 17. Each permeate membrane unit 17 has a reverse osmosis membrane 172 housed inside its housing 171. The upper end of the housing 171 has an opening 173. The outer wall of the opening 173 has a circumferentially extending protrusion 174. One end of the protrusion 174 is fixed with a positioning block 175. The side wall of the positioning block 175 near the center of the housing 171 has a groove 176. An end cap 177 seals the opening 173. Its outer wall has a circumferentially extending protrusion 178. The end of the protrusion 178 opposite to the protrusion 174 is fixed with a positioning block 179. The side wall of the positioning block 179 near the center of the housing 171 has a groove 180. During assembly, the end cover 177 is placed over the opening 173, and the end cover 177 is rotated so that protrusion 174 is inserted into groove 180 and protrusion 178 is inserted into groove 176, thereby achieving axial positioning of the end cover 177 and the housing 171.

[0055] A limiting assembly 181 is installed at the connection between the end cap 177 and the housing 171. Its rotating rod 1811 is rotatably mounted on the outer wall of the second protrusion 178 via a bushing, and a limiting block 1812 is fixed to the end of the rotating rod 1811. A rotating plate 1813 is rotatably mounted on the side wall of the second positioning block 179 near the rotating rod 1811 via a hinge, and a through hole 1814 is provided on the rotating plate 1813. After the end cap 177 and the housing 171 are axially positioned, the rotating plate 1813 rotates towards the rotating rod 1811, causing the limiting block 1812 to pass through the through hole 1814. Subsequently, rotating the rotating rod 1811 causes the limiting block 1812 to abut against the end face of the rotating plate 1813, thereby limiting the rotation of the end cap 177. The width of the limiting block 1812 is smaller than the width of the through hole 1814, and the length is greater than the width of the through hole 1814. After the limiting block 1812 passes through the through hole 1814, it rotates and its two end faces abut against the two sides of the rotating plate 1813 and generate pressure, which further enhances the limiting effect.

[0056] The housing 171 and end cap 177 of the permeate membrane module unit 17 are axially positioned through the interlocking structure of protrusion 174 and groove 180, and protrusion 178 and groove 176. Compared with the traditional bolt connection method, the positioning and assembly of the end cap 177 and housing 171 can be completed without the aid of tools, which greatly shortens the disassembly and assembly time of the membrane module and avoids the problem of disassembly difficulties caused by bolt corrosion after long-term use. The limiting component 181, through the cooperation of the rotating rod 1811, the limiting block 1812 and the rotating plate 1813, can effectively limit the rotation of the end cap 177, prevent the positioning structure of the end cap 177 and housing 171 from loosening due to vibration and other factors during the cleaning process, ensure the sealing reliability of both and avoid cleaning fluid leakage.

[0057] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A reverse osmosis chemical cleaning device, characterized in that, include: Liquid inlet pipe (1), which is used to supply cleaning fluid to membrane module one (2) and membrane module two (3); Branch line 2 (4), one end of which is connected to the outlet end of membrane module 1 (2) and the inlet end of membrane module 2 (3), The liquid outlet pipe (5) is connected to the outlet end of the branch (4) and the membrane module (3); The cleaning fluid flowing through membrane module one (2) can be output to the outlet pipe (5) through the branch line two (4) or the cleaning fluid can flow into membrane module two (3) through the branch line two (4).

2. The reverse osmosis chemical cleaning device according to claim 1, characterized in that, It also includes a branch line (6), the water inlet of the branch line (6) is connected to the liquid inlet pipe (1), and the water outlet of the branch line (6) is connected to the water inlet of the membrane module (2); Branch line 3 (7) is connected to the water outlet of membrane module 2 (3), and the water outlet of membrane module 2 (3) is connected to the liquid outlet pipe (5) via branch line 3 (7).

3. The reverse osmosis chemical cleaning device according to claim 1, characterized in that, The outlet of membrane module 1 (2) is connected to the inlet of membrane module 2 (3) by a pipeline channel (8). One end of branch 2 (4) is connected to the pipeline channel (8). Branch 2 (4) is equipped with a switching valve (9). The switching valve (9) is used to control the opening and closing of branch 2 (4) so ​​that the liquid flowing out of membrane module 1 (2) is discharged through branch 2 (4) or through membrane module 2 (3).

4. The reverse osmosis chemical cleaning device according to claim 2, characterized in that, The inlet pipe (1), the first branch (6), the first membrane module (2), the second branch (4) and the outlet pipe (5) form a cleaning circuit (10). The inlet pipe (1), the second branch (4), the second membrane module (3), the third branch (7), and the outlet pipe (5) form a two-stage cleaning circuit (11).

5. A reverse osmosis chemical cleaning device according to claim 2, characterized in that, Also includes: A water inlet valve (12) is installed on the first branch (6), and the first water inlet valve (12) is used to control the opening and closing of the first branch (6); The two-stage water inlet valve (13) is installed on the liquid outlet pipe (5) and located between the first branch (6) and the second branch (4).

6. The reverse osmosis chemical cleaning device according to claim 2, characterized in that, A water outlet valve (14) is provided on the third branch (7), and the water outlet valve (14) is used to control the opening and closing of the third branch (7).

7. The reverse osmosis chemical cleaning device according to claim 1, characterized in that, Both membrane module 1 (2) and membrane module 2 (3) have liquid outlets connected to liquid outlet pipes (15). The liquid outlet pipes (15) are equipped with low point discharge valves (16), which are used to discharge the liquid remaining in the liquid outlet pipes (15).

8. The reverse osmosis chemical cleaning device according to claim 1, characterized in that, Both membrane module one (2) and membrane module two (3) include a plurality of permeable membrane unit (17), wherein the permeable membrane unit (17) includes: The housing (171) is used to accommodate the reverse osmosis membrane (172). The upper end of the housing (171) is provided with an opening (173). The outer side wall of the opening (173) is provided with a protrusion (174) extending in the circumferential direction. One end of the protrusion (174) is provided with a positioning block (175). The side wall of the positioning block (175) near the center of the housing (171) is provided with a groove (176). End cap (177), the end cap (177) is used to seal the opening (173), the outer side wall of the end cap (177) is provided with a second protrusion (178) extending in the circumferential direction, the second protrusion (178) is provided with a second positioning block (179) at one end opposite to the first protrusion (174), and the second positioning block (179) has a second groove (180) on the side wall near the center of the housing (171). After the end cap (177) can be rotated, the first protrusion (174) is inserted into the second groove (180), and the second protrusion (178) is inserted into the first groove (176), so that the end cap (177) and the housing (171) are axially positioned.

9. A reverse osmosis chemical cleaning device according to claim 8, characterized in that, It also includes a limiting component (181) for limiting the rotation of the end cap (177), the limiting component (181) comprising: A rotating rod (1811) is rotatably mounted on the second protrusion (178), and a limiting block (1812) is provided at the end of the rotating rod (1811). A rotating plate (1813) is rotatably mounted on the side wall of the positioning block (179) near the rotating rod (1811). A through hole (1814) is provided on the rotating plate (1813). The rotating rod (1811) and the rotating plate (1813) are configured such that after the rotating plate (1813) rotates to the side near the rotating rod (1811), the limiting block (1812) can pass through the through hole (1814). After the rotating rod (1811) rotates, the limiting block (1812) abuts against the rotating plate (1813) to restrict the rotation of the end cap (177).

10. A reverse osmosis chemical cleaning device according to claim 9, characterized in that, The width of the limiting block (1812) is smaller than the width of the through hole (1814), and the length of the limiting block (1812) is greater than the width of the through hole (1814). The limiting block (1812) can pass through the through hole (1814) and rotate to press the end face of the rotating plate (1813).

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