CN219922607U - Reverse osmosis membrane segmentation washing unit - Google Patents
Reverse osmosis membrane segmentation washing unit Download PDFInfo
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- CN219922607U CN219922607U CN202321432443.9U CN202321432443U CN219922607U CN 219922607 U CN219922607 U CN 219922607U CN 202321432443 U CN202321432443 U CN 202321432443U CN 219922607 U CN219922607 U CN 219922607U
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- reverse osmosis
- osmosis membrane
- pipeline
- water
- membrane group
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- 239000012528 membrane Substances 0.000 title claims abstract description 153
- 238000001223 reverse osmosis Methods 0.000 title claims abstract description 114
- 238000005406 washing Methods 0.000 title description 17
- 230000011218 segmentation Effects 0.000 title description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 156
- 238000011010 flushing procedure Methods 0.000 claims abstract description 67
- 238000004140 cleaning Methods 0.000 claims abstract description 37
- 238000004519 manufacturing process Methods 0.000 claims abstract description 7
- 238000004891 communication Methods 0.000 claims description 4
- 239000012141 concentrate Substances 0.000 claims 2
- 150000003839 salts Chemical class 0.000 abstract description 6
- 230000010287 polarization Effects 0.000 abstract description 3
- 230000008021 deposition Effects 0.000 abstract description 2
- 239000003344 environmental pollutant Substances 0.000 abstract description 2
- 231100000719 pollutant Toxicity 0.000 abstract description 2
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 238000011001 backwashing Methods 0.000 description 13
- 238000000034 method Methods 0.000 description 6
- 239000002351 wastewater Substances 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 239000000149 chemical water pollutant Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The utility model discloses a reverse osmosis membrane sectional flushing device, and relates to the technical field of reverse osmosis membrane cleaning. A reverse osmosis membrane sectional flushing device comprises a first-stage reverse osmosis membrane group, a second-stage reverse osmosis membrane group, a raw water tank, a cleaning tank, a water production tank and a raw water pump; the water inlet of the first-stage reverse osmosis membrane group is communicated with the water outlet of the raw water tank through a water inlet pipeline, the water producing end of the first-stage reverse osmosis membrane group is communicated with the water producing tank, and the concentrated water end of the first-stage reverse osmosis membrane group is communicated with the water inlet of the second-stage reverse osmosis membrane group through a concentrated water outlet pipeline; the first section reverse osmosis membrane group is connected with a back flushing pipeline in parallel. The utility model can effectively reduce the pollutant deposition at the tail end of the reverse osmosis membrane, and then the back flushing and the forward flushing of the whole section of reverse osmosis membrane set are carried out, thereby solving the problems that the most tail end membrane is often not thoroughly flushed, the concentration polarization of the membrane and the scale formation of insoluble salt are caused in the existing multi-core and multi-section membranes.
Description
Technical Field
The utility model relates to the technical field of reverse osmosis membrane cleaning, in particular to a reverse osmosis membrane sectional flushing device.
Background
In many industrial production processes, a large amount of salt-containing wastewater can be generated, in order to improve the recovery rate of wastewater and reduce the discharge amount, a reverse osmosis membrane group is generally adopted to recycle the salt-containing wastewater at present, along with the continuous improvement of environmental protection requirements and technical levels, a complete two-stage reverse osmosis membrane process system is formed for treating high-salt wastewater such as landfill leachate, but after the reverse osmosis membrane is operated for a period of time, suspended particles in water can be deposited on the surface of a membrane, indissolvable salt can be precipitated from concentrated water under the condition of exceeding the saturation limit, scale is formed at the tail end of a membrane element, membrane pollution is caused, a water inlet flow channel is blocked, the membrane flux is reduced, the operating pressure is increased, and finally produced water is reduced, the water quality is reduced, and the like.
The cleaning of the reverse osmosis membrane is taken as a main solution for solving the pollution problem of the membrane element, and whether the technology is perfect and the application is reasonable greatly influences the operation efficiency and the service life of the reverse osmosis membrane element. Generally, cleaning can be divided into two modes of online cleaning and offline cleaning, wherein offline cleaning is more complicated, membrane elements are required to be taken out of a system, and cleaning equipment is used for cleaning, so that a reverse osmosis membrane with serious pollution can be effectively treated, but the consumed time is longer; the membrane element is not required to be taken out during online cleaning, and the method mainly adopts a relatively conventional treatment method such as low-pressure high-flow-rate flushing, back-pressure flushing, back flushing or cleaning by adding an acid-base chemical agent, is simple to operate and low in cost, and is a cleaning mode of most of the current systems.
The conventional reverse osmosis membrane online flushing mode is generally suitable for carrying out forward flushing and back flushing on the whole process, but for multi-core and multi-section membranes, the most-terminal membrane is often not thoroughly flushed, and the problems of concentration polarization and indissolvable salt scaling of the membrane still exist.
Disclosure of Invention
The utility model aims to provide a segmented flushing device for a reverse osmosis membrane, which aims to solve the problems that the membranes at the tail ends of the existing multi-core and multi-segment membranes are often not thoroughly flushed, and concentration polarization and indissolvable salt scaling of the membranes still exist.
The technical scheme for solving the technical problems is as follows:
a reverse osmosis membrane sectional flushing device comprises a first-stage reverse osmosis membrane group, a second-stage reverse osmosis membrane group, a raw water tank, a cleaning tank and a water production tank; the water inlet of the first-stage reverse osmosis membrane group is communicated with the water outlet of the raw water tank through a water inlet pipeline, the water producing end of the first-stage reverse osmosis membrane group is communicated with the water producing tank, the concentrated water end of the first-stage reverse osmosis membrane group is communicated with the water inlet of the secondary-stage reverse osmosis membrane group through a concentrated water outlet pipeline, and a secondary-stage water inlet valve is arranged on the concentrated water outlet pipeline; the first-stage reverse osmosis membrane group is connected in parallel with a back flushing pipeline, one end of the back flushing pipeline is communicated with a water inlet pipeline, the other end of the back flushing pipeline is communicated with a concentrated water outlet pipeline, the communicated position of the back flushing pipeline and the concentrated water outlet pipeline is positioned in front of the water inlet valve of the secondary stage, and a first-stage back flushing valve is arranged on the back flushing pipeline; the water outlet of the cleaning box is provided with a secondary section normal cleaning valve, the secondary section normal cleaning valve is communicated with a three-way pipeline, one end of the three-way pipeline is communicated with the water inlet of the secondary section reverse osmosis membrane group, the other end of the three-way pipeline is communicated with the water outlet of the water production box, a cleaning pump is arranged between the three-way pipeline and the water inlet of the secondary section reverse osmosis membrane group, and a secondary section replacement valve is arranged between the three-way pipeline and the water outlet of the water production box.
Further, the raw water pump and the high-pressure pump are sequentially arranged on the water inlet pipeline, and the communication part of the back flushing pipeline and the water inlet pipeline is positioned between the raw water pump and the high-pressure pump.
Further, the first section of reverse osmosis membrane group is a group of reverse osmosis membranes or a plurality of groups of reverse osmosis membranes which are connected in parallel, the concentrated water ends of the reverse osmosis membranes which are connected in parallel are respectively communicated with a back flushing pipeline through branch pipelines, and the branch pipelines are respectively provided with a single membrane back flushing valve.
Further, a backwash drain pipeline is communicated with the front of the water inlet of the first section reverse osmosis membrane group, and a backwash drain valve is arranged on the backwash drain pipeline.
Further, the back flushing pipeline is communicated with a cleaning box through a forward flushing drainage pipeline, and the forward flushing drainage pipeline is positioned behind the first section back flushing valve.
Further, the water producing end of the secondary reverse osmosis membrane group is communicated with a water producing tank, and the concentrated water end of the secondary reverse osmosis membrane group is provided with a concentrated water control valve.
The utility model has the following beneficial effects:
(1) The concentrated water end of each membrane in the first-stage reverse osmosis membrane group is independently communicated with the back flushing pipeline, so that back flushing of a single membrane can be performed first, pollutant deposition at the tail end of the reverse osmosis membrane can be effectively reduced, and back flushing and forward flushing of the whole reverse osmosis membrane group can be performed, so that the flushing efficiency can be remarkably improved, the scaling trend at the tail end of the membrane can be reduced, the cleaning period of the reverse osmosis membrane can be prolonged, and the service life of the reverse osmosis membrane can be prolonged;
(2) The two-stage membrane group is cleaned by using the reverse osmosis membrane produced water to replace concentrated water in the two-stage module and then is subjected to forward cleaning, so that the membrane group can be effectively cleaned, and the flushing water quantity can be saved;
(3) The cleaning process can effectively reduce the pressure difference between two membrane sections and reduce the cleaning frequency.
Drawings
FIG. 1 is a schematic diagram of a segmented flushing device for reverse osmosis membranes according to the present utility model.
In the figure: 1-a first-stage reverse osmosis membrane group; 2-secondary section reverse osmosis membrane group; 3-a raw water tank; 4-a cleaning box; 5-producing water tank; 6-raw water pump; 7-a high pressure pump; 8-a cleaning pump; 9-a secondary section water inlet valve; 10-a concentrated water control valve; 11-a reverse osmosis membrane water inlet valve; 12-backwashing an evacuation valve; 13-a single-branch membrane backwash valve; 14-first section backwashing valve; 15-first-stage positive washing exhaust valve; a 16-time section positive washing valve; 17-stage displacement valve; 19-a water inlet pipeline; 20-a concentrated water outlet pipeline; 21-back flushing the pipeline; 22-normal washing drainage pipeline.
Detailed Description
The principles and features of the present utility model are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the utility model and are not to be construed as limiting the scope of the utility model.
Referring to fig. 1, a reverse osmosis membrane segmented flushing device includes a first-stage reverse osmosis membrane set 1, a second-stage reverse osmosis membrane set 2, a raw water tank 3, a cleaning tank 4 and a water producing tank 5, wherein a water inlet of the first-stage reverse osmosis membrane set 1 is communicated with a water outlet of the raw water tank 3 through a water inlet pipeline 19, a water producing end of the first-stage reverse osmosis membrane set 1 is communicated with the water producing tank 5, a concentrated water end of the first-stage reverse osmosis membrane set 1 is communicated with a water inlet of the second-stage reverse osmosis membrane set 2 through a concentrated water outlet pipeline 20, and a second-stage water inlet valve 9 is arranged on the concentrated water outlet pipeline 20.
The raw water pump 6 and the high-pressure pump 7 are sequentially arranged on the water inlet pipeline 19, the communication part of the back flushing pipeline 21 and the water inlet pipeline 19 is positioned between the raw water pump 6 and the high-pressure pump 7, the reverse osmosis membrane water inlet valve 11 is arranged between the high-pressure pump 7 and the first-stage reverse osmosis membrane group 1, and the raw water pump 6 and the high-pressure pump 7 are used for pumping water into the first-stage reverse osmosis membrane group 1 and the second-stage reverse osmosis membrane group 2 when the system operates.
The first-stage reverse osmosis membrane group 1 is connected in parallel with a back flushing pipeline 21, one end of the back flushing pipeline 21 is communicated with a water inlet pipeline 19, the other end of the back flushing pipeline 21 is communicated with a concentrated water outlet pipeline 20, the communicated position of the back flushing pipeline 21 and the concentrated water outlet pipeline 20 is positioned in front of the secondary-stage water inlet valve 9, and the back flushing pipeline 21 is provided with a first-stage back flushing valve 14.
The first section reverse osmosis membrane group 1 is a group of reverse osmosis membranes or a plurality of groups of reverse osmosis membranes which are connected in parallel, the concentrated water ends of the reverse osmosis membranes which are connected in parallel are respectively communicated with a back flushing pipeline 21 through branch pipelines, and the branch pipelines are respectively provided with a single-branch membrane back flushing valve 13. When back washing operation is carried out, each membrane tube of the first-section reverse osmosis membrane group 1 can be back washed, the whole-section membrane group can also be back washed, and after back washing of a single membrane, the scaling trend of the tail end is effectively lightened, and then the whole-section back washing is carried out.
The water inlet front of the first section reverse osmosis membrane group 1 is communicated with a backwash drain pipeline, a backwash drain valve 12 is arranged on the backwash drain pipeline, and backwash produced water is discharged from the backwash drain pipeline.
The back wash pipeline 21 is communicated with the cleaning box 4 through a forward wash drain pipeline 22, the forward wash drain pipeline 22 is positioned behind the first section back wash valve 14, the forward wash drain pipeline 22 is provided with a first section forward wash drain valve 15, and forward wash product water enters the cleaning box 4 through the forward wash drain pipeline 22 and is used for forward wash of the second section reverse osmosis membrane group 2.
The water outlet of the cleaning box 4 is provided with a secondary section normal cleaning valve 16, the secondary section normal cleaning valve 16 is communicated with a three-way pipeline, one end of the three-way pipeline is communicated with the water inlet of the secondary section reverse osmosis membrane group 2, the other end of the three-way pipeline is communicated with the water outlet of the water production box 5, a cleaning pump 8 is arranged between the three-way pipeline and the water inlet of the secondary section reverse osmosis membrane group 2, and a secondary section replacement valve 17 is arranged between the three-way pipeline and the water outlet of the water production box 5. Through the secondary section normal washing valve 16 and the secondary section replacement valve 17, the concentrated water in the secondary section reverse osmosis membrane group 2 is replaced by reverse osmosis membrane produced water, and then the water in the washing tank 4 is normal washed. The secondary reverse osmosis membrane group 2 is cleaned by using the reverse osmosis membrane produced water to replace the concentrated water in the secondary reverse osmosis membrane group 2, and then forward cleaning is performed, so that the membrane group can be effectively cleaned, and the flushing water quantity can be saved.
The water producing end of the secondary section reverse osmosis membrane group 2 is communicated with a water producing tank 5, the concentrated water end of the secondary section reverse osmosis membrane group 2 is provided with a concentrated water control valve 10, and the concentrated water of the secondary section reverse osmosis membrane group 2 and the cleaning water of the secondary section reverse osmosis membrane group 2 are discharged through a secondary section concentrated water end water outlet pipeline.
The working process of the reverse osmosis membrane sectional flushing device is as follows:
1) When cleaning is carried out, a single-branch membrane backwashing valve 13 and a backwashing evacuation valve 12 are opened, after all other valves are closed, a raw water pump 6 is started, backwashing is carried out on the concentrated water end of each single-branch membrane tube of the first-stage reverse osmosis membrane group 1 in sequence, and after each membrane tube is washed for a few minutes, the next single-branch membrane backwashing valve 13 is started for washing;
2) After all the membrane pipes are cleaned, opening a first section backwash valve 14, closing a single-branch membrane backwash valve 13, and backwashing the first section reverse osmosis membrane group 1, at the moment, opening a secondary section replacement valve 17 and a concentrated water control valve 10, and opening a cleaning pump 8 to replace concentrated water in the secondary section reverse osmosis membrane group 2;
3) After the back washing of the first section of membrane group is completed, the first section of membrane group is subjected to forward washing, the raw water pump 6, the first section of back washing valve 14 and the back washing evacuation valve 12 are sequentially closed, the reverse osmosis membrane water inlet valve 11 and the first section of forward washing evacuation valve 15 are opened, the raw water pump 6 is started again, at the moment, the system performs forward washing operation, and forward washing evacuation enters the washing tank 4 for standby;
4) After the concentrated water in the secondary reverse osmosis membrane group 2 is replaced, opening a secondary forward washing valve 16, closing a secondary replacement valve 17, and forward washing the secondary reverse osmosis membrane group 2;
5) After all reverse osmosis membrane groups are cleaned, the backwash emptying valve 12, the single-branch membrane backwash valve 13, the first section backwash valve 14, the first section forward washing discharge valve 15, the second section forward washing valve 16 and the second section replacement valve 17 are closed, and the reverse osmosis membrane water inlet valve 11, the concentrated water control valve 10 and the second section water inlet valve 9 are opened, so that the multi-section reverse osmosis membrane groups can be operated again to carry out water treatment.
The foregoing description of the preferred embodiments of the utility model is not intended to limit the utility model to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the utility model are intended to be included within the scope of the utility model.
Claims (6)
1. A reverse osmosis membrane segmented flushing device, comprising: a first-stage reverse osmosis membrane group (1), a second-stage reverse osmosis membrane group (2), a raw water tank (3), a cleaning tank (4) and a water production tank (5);
the water inlet of the first-stage reverse osmosis membrane group (1) is communicated with the water outlet of the original water tank (3) through a water inlet pipeline (19), the water producing end of the first-stage reverse osmosis membrane group (1) is communicated with the water producing tank (5), the concentrated water end of the first-stage reverse osmosis membrane group (1) is communicated with the water inlet of the secondary-stage reverse osmosis membrane group (2) through a concentrated water outlet pipeline (20), and a secondary-stage water inlet valve (9) is arranged on the concentrated water outlet pipeline (20);
the first-stage reverse osmosis membrane group (1) is connected in parallel with a back flushing pipeline (21), one end of the back flushing pipeline (21) is communicated with the water inlet pipeline (19), the other end of the back flushing pipeline (21) is communicated with the concentrated water outlet pipeline (20), the communication position of the back flushing pipeline (21) and the concentrated water outlet pipeline (20) is positioned in front of the secondary-stage water inlet valve (9), and the back flushing pipeline (21) is provided with a first-stage back flushing valve (14);
the utility model discloses a three-way pipeline reverse osmosis membrane water tank, including three-way pipeline, water tank (5) and water tank, the delivery port of wasing case (4) is provided with the valve (16) is just washed to the hypomere, the valve (16) is just washed to the hypomere intercommunication has the tee bend pipeline, the one end of tee bend pipeline with the water inlet intercommunication of hypomere reverse osmosis membrane group (2), the other end of tee bend pipeline with produce the delivery port intercommunication of water tank (5), the tee bend pipeline with be provided with between the water inlet of hypomere reverse osmosis membrane group (2) wash pump (8), the tee bend pipeline with be provided with hypomere replacement valve (17) between the delivery port of water tank (5).
2. The reverse osmosis membrane segmented flushing device according to claim 1, wherein a raw water pump (6) and a high-pressure pump (7) are sequentially arranged on the water inlet pipeline (19), and the communication position of the back flushing pipeline (21) and the water inlet pipeline (19) is located between the raw water pump (6) and the high-pressure pump (7).
3. The reverse osmosis membrane segmented flushing device according to claim 1, wherein the first-stage reverse osmosis membrane group (1) is a group of reverse osmosis membranes or a plurality of groups of reverse osmosis membranes connected in parallel, the concentrated water ends of the first-stage reverse osmosis membrane group are respectively communicated with the back flushing pipeline (21) through branch pipelines, and single membrane back flushing valves (13) are respectively arranged on the branch pipelines.
4. The reverse osmosis membrane segmented flushing device according to claim 1, wherein a backwash drain pipeline is communicated with the front of the water inlet of the first-stage reverse osmosis membrane group (1), and a backwash drain valve (12) is arranged on the backwash drain pipeline.
5. The reverse osmosis membrane segmented flushing device according to claim 1, characterized in that the back flushing pipeline (21) is communicated with a flushing tank (4) through a forward flushing drain pipeline (22), the forward flushing drain pipeline (22) being located after the first segment back flushing valve (14).
6. The reverse osmosis membrane segmented flushing device according to any one of claims 1 to 5, wherein the water producing end of the secondary reverse osmosis membrane group (2) is communicated with the water producing tank (5), and the concentrate end of the secondary reverse osmosis membrane group (2) is provided with a concentrate control valve (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321432443.9U CN219922607U (en) | 2023-06-06 | 2023-06-06 | Reverse osmosis membrane segmentation washing unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321432443.9U CN219922607U (en) | 2023-06-06 | 2023-06-06 | Reverse osmosis membrane segmentation washing unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219922607U true CN219922607U (en) | 2023-10-31 |
Family
ID=88493713
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321432443.9U Active CN219922607U (en) | 2023-06-06 | 2023-06-06 | Reverse osmosis membrane segmentation washing unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219922607U (en) |
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2023
- 2023-06-06 CN CN202321432443.9U patent/CN219922607U/en active Active
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