CN220900044U - Offline cleaning system for reverse osmosis membrane - Google Patents
Offline cleaning system for reverse osmosis membrane Download PDFInfo
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- CN220900044U CN220900044U CN202322830002.0U CN202322830002U CN220900044U CN 220900044 U CN220900044 U CN 220900044U CN 202322830002 U CN202322830002 U CN 202322830002U CN 220900044 U CN220900044 U CN 220900044U
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- reverse osmosis
- osmosis membrane
- cleaning
- solvent tank
- tank
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- 238000004140 cleaning Methods 0.000 title claims abstract description 151
- 239000012528 membrane Substances 0.000 title claims abstract description 140
- 238000001223 reverse osmosis Methods 0.000 title claims abstract description 138
- 239000007788 liquid Substances 0.000 claims abstract description 115
- 239000002904 solvent Substances 0.000 claims abstract description 110
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 80
- 230000002378 acidificating effect Effects 0.000 claims abstract description 23
- 238000011033 desalting Methods 0.000 claims abstract description 23
- 239000002253 acid Substances 0.000 claims description 39
- 238000010992 reflux Methods 0.000 claims description 24
- 238000000034 method Methods 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 8
- 239000000243 solution Substances 0.000 description 26
- 238000005406 washing Methods 0.000 description 16
- 238000002360 preparation method Methods 0.000 description 9
- 239000000126 substance Substances 0.000 description 5
- 238000011010 flushing procedure Methods 0.000 description 4
- 238000005554 pickling Methods 0.000 description 4
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012459 cleaning agent Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000001509 sodium citrate Substances 0.000 description 1
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 description 1
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- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The utility model discloses an offline cleaning system for a reverse osmosis membrane, which comprises a desalting water tank, an alkaline solvent tank, an acidic solvent tank, a security filter, a plurality of reverse osmosis membrane shells, an underground collecting tank and a control system, wherein the reverse osmosis membrane shells are single-support membrane shells, liquid outlets of the desalting water tank, the alkaline solvent tank and the acidic solvent tank are respectively connected with liquid inlet ends of the security filter, liquid outlet ends of the security filter are connected with a cleaning liquid inlet pipeline of the reverse osmosis membrane shells, a cleaning liquid outlet of the reverse osmosis membrane shells is communicated with a backflow port on the alkaline solvent tank and the acidic solvent tank, the cleaning liquid outlet of the reverse osmosis membrane shells is also connected into the underground collecting tank through a second outlet valve and a drain pipe, and a cleaning pump is arranged on the water outlet pipe. The method can clean a plurality of reverse osmosis membranes or individual reverse osmosis membranes simultaneously, accurately control the flow rate, the flow rate and the water inlet pressure of the cleaning solution, ensure that each reverse osmosis membrane can be thoroughly cleaned, and has good cleaning effect and high efficiency, so that the cleaned reverse osmosis membrane has good reverse osmosis performance.
Description
Technical Field
The utility model relates to the technical field of cleaning equipment, in particular to an offline cleaning system for a reverse osmosis membrane.
Background
At present, reverse osmosis membranes are widely applied to the fields of purified water treatment, water in the medical industry, sea water desalination, sewage treatment, cooling tower makeup water, boiler makeup water, bioengineering, environmental protection engineering, thermal power plants and the like. After the reverse osmosis membrane system operates for a certain time, a layer of pollutant is deposited in the reverse osmosis membrane assembly, so that the performance of the reverse osmosis membrane is affected, and the reverse osmosis membrane is required to be cleaned to recover the performance.
At present, a reverse osmosis membrane system mostly adopts an online cleaning mode. Because the reverse osmosis membrane components in the large-scale reverse osmosis membrane system are generally a plurality of reverse osmosis membrane components which are arranged in series in one reverse osmosis membrane shell, when the reverse osmosis membrane system is cleaned, cleaning liquid enters the reverse osmosis membrane shell, the reverse osmosis membrane components are cleaned in sequence, and the like until the cleaning of the reverse osmosis membrane components at the tail end is completed. The problem of online cleaning of reverse osmosis membrane systems is: the flow of the cleaning liquid in the process of cleaning the reverse osmosis system is long, and the effective components of the cleaning liquid gradually decrease along with the progress of the cleaning process in the process of cleaning the chemical cleaning liquid; meanwhile, pollutants cleaned from the front end reverse osmosis membrane assembly are mixed in the cleaning liquid, and the rear end reverse osmosis membrane assembly is blocked by dirt, so that the flow speed is reduced. The cleaning effect of the back end reverse osmosis membrane components is seriously reduced by cleaning the reverse osmosis membrane components in the online cleaning mode, and new pollution and blockage can be caused to the back end reverse osmosis membrane components seriously. Therefore, the utility model provides a novel offline cleaning system for a reverse osmosis membrane, so as to solve the technical problems.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art and provide an offline cleaning system for reverse osmosis membranes, wherein the reverse osmosis membrane shells are designed into single-support membrane shells, the cleaning system can clean a plurality of reverse osmosis membranes simultaneously, can also clean individual reverse osmosis membranes independently, and can accurately control the flow rate, the flow rate and the water inlet pressure of a chemical cleaning process, so that each reverse osmosis membrane can be thoroughly cleaned, the cleaning effect is good, the cleaning efficiency is high, and the cleaned reverse osmosis membranes have good reverse osmosis performance; flushing water in the cleaning process is discharged into an underground collecting tank, so that pollution to the environment caused by direct discharge is avoided; the whole structure is simple and compact in design, reasonable in layout, high in application and implementation feasibility and high in practicability.
In order to achieve the above purpose, the technical scheme of the utility model is to design an off-line cleaning system for a reverse osmosis membrane, which comprises a desalting water tank, an alkaline solvent tank, an acidic solvent tank, a security filter, a plurality of reverse osmosis membrane shells, an underground collecting tank and a control system, wherein the reverse osmosis membrane shells are all single-support membrane shells, the desalting water tank, the alkaline solvent tank and the acidic solvent tank are respectively externally connected with desalted water, a liquid outlet of the desalting water tank, a liquid outlet of the alkaline solvent tank and a liquid outlet of the acidic solvent tank are respectively connected with a liquid inlet end of the security filter through a liquid outlet valve and a liquid outlet pipe, the liquid outlet end of the security filter is respectively connected with a cleaning liquid inlet pipeline of the reverse osmosis membrane shells through an outlet valve I and a return pipe, a cleaning liquid outlet of the reverse osmosis membrane shells is respectively connected with a return port on the alkaline solvent tank and a return port on the acidic solvent tank through an outlet valve II and a drain pipe, a cleaning liquid pump positioned on the downstream side of the outlet valve is also respectively arranged on the drain pipe, and the return port on the alkaline solvent tank and the return valve I and the return valve II are respectively connected with a cleaning liquid outlet valve, a return valve, a control valve and a return valve I and a cleaning liquid outlet valve and a return valve.
The offline cleaning system for the reverse osmosis membrane has the advantages that the reverse osmosis membrane shells are designed to be single-support membrane shells, a plurality of reverse osmosis membranes can be cleaned simultaneously, individual reverse osmosis membranes can be cleaned independently, the flow speed, the flow rate and the water inlet pressure of a chemical cleaning process can be controlled accurately, each reverse osmosis membrane can be thoroughly cleaned, the cleaning effect is good, the cleaning efficiency is high, and the cleaned reverse osmosis membranes have good reverse osmosis performance; flushing water in the cleaning process is discharged into an underground collecting tank, so that pollution to the environment caused by direct discharge is avoided; the whole structure is simple and compact in design, reasonable in layout, high in application and implementation feasibility and high in practicability.
The preferred technical scheme is, the liquid outlet of alkaline solvent case still be linked together through wash pump and join in marriage the return port at liquid back flow and alkaline solvent case top, the liquid outlet of acid solvent case still be linked together through wash pump and join in marriage the return port at liquid back flow and acid solvent case top, the return port at alkaline solvent case top and the return port at acid solvent case top are equipped with respectively and join in marriage the liquid circulation valve. When the acidic cleaning solution or the alkaline cleaning solution is prepared, a cleaning pump and a solution preparation circulating valve are started, so that the solute and solvent mixed solution in the alkaline solvent tank or the acidic solvent tank can realize self-circulation flow through the cleaning pump and the solution preparation circulating pipe, and uniform cleaning solution can be quickly obtained.
The further preferable technical scheme is that the alkaline solvent tank is externally connected with hot steam through a steam main valve, an electric valve and a steam pipeline, a temperature controller is arranged on the liquid distribution return pipe, the temperature controller and the electric valve are connected with a control system through signals, and the temperature controller and the electric valve are linked. When the ambient temperature is lower, especially in winter, hot steam can be introduced into the alkaline solvent tank to heat alkaline cleaning liquid, and the temperature controller is connected with the electric valve to realize real-time automatic regulation and control of the temperature of the alkaline cleaning liquid, so that the alkaline cleaning efficiency and the alkaline cleaning effect of the reverse osmosis membrane are ensured.
Further preferable technical scheme is that a PH measuring instrument in signal connection with the control system is arranged on a pipeline between the liquid outlet end of the security filter and the cleaning liquid inlet of the reverse osmosis membrane shell. The PH measuring instrument detects PH of the cleaning solution entering the reverse osmosis membrane shell, and feeds back the detected PH signal to the control system, so that an operator can observe the PH value of the cleaning solution, and the PH value of the cleaning solution can be adjusted, and the cleaning solution is ensured to be in a proper PH range.
Further preferable technical scheme is that the desalting water tank, the alkaline solvent tank and the acid solvent tank are respectively provided with a liquid level meter. The liquid level inside the desalting water tank, the alkaline solvent tank and the acidic solvent tank is convenient for operators to observe in time, so that the cleaning agent or the cleaning water is supplied.
The further preferable technical scheme is that the emptying port of the desalting water tank, the emptying port of the alkaline solvent tank and the emptying port of the acidic solvent tank are respectively connected into the underground collecting tank through an emptying valve and a drain pipe. When equipment is in fault or is stopped for a long time, the demineralized water in the demineralized water tank, the alkaline washing solution in the alkaline solvent tank and the acid washing solution in the acid solvent tank can be discharged to the underground collecting tank for subsequent treatment, so that the pollution to the environment caused by direct discharge is avoided.
Further preferable technical scheme is that the water outlet pipe is also provided with a pressure gauge positioned between the cleaning pump and the cartridge filter, and the pressure gauge is in signal connection with the control system. The pressure value of the cleaning liquid flowing through the inside of the water outlet pipe can be observed through the pressure appearance, so that whether the power of the cleaning pump needs to be adjusted or not is judged, and the cleaning efficiency of the reverse osmosis membrane is ensured.
Further preferable technical scheme is that the cleaning solution outlets of the reverse osmosis membrane shells are respectively provided with a flow meter adjacent to the downstream side of the outlet valve, and the flow meters are in signal connection with the control system. The flux of cleaning the reverse osmosis membrane can be observed through a flow meter to judge whether the alkaline washing or acid washing time needs to be prolonged or not, so that the thoroughness of alkaline washing or acid washing of the reverse osmosis membrane is ensured.
Further preferable embodiment is that the precision of the cartridge filter is 0.5 μm.
The utility model has the advantages and beneficial effects that:
1. the offline cleaning system for the reverse osmosis membrane has the advantages that the reverse osmosis membrane shells are designed to be single-support membrane shells, a plurality of reverse osmosis membranes can be cleaned simultaneously, individual reverse osmosis membranes can be cleaned independently, the flow speed, the flow rate and the water inlet pressure of a chemical cleaning process can be controlled accurately, each reverse osmosis membrane can be thoroughly cleaned, the cleaning effect is good, the cleaning efficiency is high, and the cleaned reverse osmosis membranes have good reverse osmosis performance; flushing water in the cleaning process is discharged into an underground collecting tank, so that pollution to the environment caused by direct discharge is avoided; the whole structure is simple and compact in design, reasonable in layout, high in application and implementation feasibility and high in practicability.
2. When the acidic cleaning solution or the alkaline cleaning solution is prepared, a cleaning pump and a solution preparation circulating valve are started, so that the solute and solvent mixed solution in the alkaline solvent tank or the acidic solvent tank can realize self-circulation flow through the cleaning pump and the solution preparation circulating pipe, and uniform cleaning solution can be quickly obtained.
3. When the ambient temperature is lower, especially in winter, hot steam can be introduced into the alkaline solvent tank to heat alkaline cleaning liquid, and the temperature controller is connected with the electric valve to realize real-time automatic regulation and control of the temperature of the alkaline cleaning liquid, so that the alkaline cleaning efficiency and the alkaline cleaning effect of the reverse osmosis membrane are ensured.
4. The PH measuring instrument detects PH of the cleaning solution entering the reverse osmosis membrane shell, and feeds back the detected PH signal to the control system, so that an operator can observe the PH value of the cleaning solution, and the PH value of the cleaning solution can be adjusted, and the cleaning solution is ensured to be in a proper PH range.
5. The emptying port of the desalting water tank, the emptying port of the alkaline solvent tank and the emptying port of the acid solvent tank are respectively connected into the underground collecting tank through the emptying valve and the drain pipe. When equipment is in fault or is stopped for a long time, the demineralized water in the demineralized water tank, the alkaline washing solution in the alkaline solvent tank and the acid washing solution in the acid solvent tank can be discharged to the underground collecting tank for subsequent treatment, so that the pollution to the environment caused by direct discharge is avoided.
Drawings
Fig. 1 is a schematic diagram of the off-line cleaning system for reverse osmosis membranes of the present utility model.
In the figure: 1. a desalting water tank; 2. an alkaline solvent tank; 3. an acidic solvent tank; 4. a cartridge filter; 5. a reverse osmosis membrane shell; 6. an underground collection pool; 7. a water outlet pipe; 8. a return pipe; 9. a drain pipe; 10. a blow-down pipe; 11. a liquid preparation return pipe; a. a cleaning pump; b. a pressure gauge; c. a PH measuring instrument; d. a liquid outlet valve; e. a blow-off valve; f. a liquid level gauge; g. a temperature controller; h. a steam main valve; i. an electric valve; j. a cleaning liquid return valve; k. a liquid preparation circulating valve; m, an inlet valve; n-1, outlet valve one; n-2, outlet valve two; o, flow meter.
Detailed Description
The following describes the embodiments of the present utility model further with reference to the drawings and examples. The following examples are only for more clearly illustrating the technical aspects of the present utility model, and are not intended to limit the scope of the present utility model.
Examples
As shown in figure 1, the utility model relates to an off-line cleaning system for a reverse osmosis membrane, which comprises a desalting water tank 1, an alkaline solvent tank 2, an acid solvent tank 3, a security filter 4, a plurality of reverse osmosis membrane shells 5, an underground collecting tank 6 and a control system, wherein the reverse osmosis membrane shells 5 are all single-support membrane shells, the desalting water tank 1, the alkaline solvent tank 2 and the acid solvent tank 3 are respectively externally connected with desalted water, a liquid outlet of the desalting water tank 1, a liquid outlet of the alkaline solvent tank 2 and a liquid outlet of the acid solvent tank 3 are respectively connected with a liquid inlet end of the security filter 4 through a liquid outlet valve d and a water outlet pipe 7, the liquid outlet end of the security filter 4 is respectively connected with a cleaning liquid inlet pipeline of the reverse osmosis membrane shells 5 through an inlet valve m, outlets of the reverse osmosis membrane shells 5 are respectively connected with a reflux port on the alkaline solvent tank 2 and a reflux port on the acid solvent tank 3 through an outlet valve n-1, the outlets of the reverse osmosis membrane shells 5 are respectively connected with the underground collecting tank 6 through outlet valves n-2 and a water outlet valve j, the water outlet of the reverse osmosis membrane shells 7 is also respectively provided with a cleaning liquid outlet valve j, the reverse osmosis membrane shells are respectively arranged on the water outlet valve 7 and are respectively connected with a cleaning liquid outlet valve a water outlet valve a and a water outlet valve b, the reverse osmosis membrane shell 2 is respectively, the reverse osmosis membrane shell is respectively connected with a water inlet valve b, the reverse osmosis membrane is connected with a water pump.
Preferably, the liquid outlet of the alkaline solvent tank 2 is further communicated with the reflux inlet at the top of the alkaline solvent tank 2 through the cleaning pump a and the liquid distribution reflux pipe 11, the liquid outlet of the acidic solvent tank 3 is further communicated with the reflux inlet at the top of the acidic solvent tank 3 through the cleaning pump a and the liquid distribution reflux pipe 11, and the reflux inlet at the top of the alkaline solvent tank 2 and the reflux inlet at the top of the acidic solvent tank 3 are respectively provided with a liquid distribution circulation valve k.
Further preferably, the alkaline solvent tank 2 is further externally connected with hot steam through a steam main valve h, an electric valve i and a steam pipeline, the liquid distribution return pipe 11 is provided with a temperature controller g, the temperature controller g and the electric valve i are connected with a control system through signals, and the temperature controller g and the electric valve i are linked.
Further preferably, a PH measuring instrument c in signal connection with the control system is arranged on a pipeline between the liquid outlet end of the cartridge filter 4 and the cleaning liquid inlet of the reverse osmosis membrane shell 5.
Further preferably, the demineralized water tank 1, the alkaline solvent tank 2 and the acid solvent tank 3 are respectively provided with a liquid level meter f.
Further preferably, the vent of the desalting water tank 1, the vent of the alkaline solvent tank 2 and the vent of the acidic solvent tank 3 are respectively connected into the underground collecting tank 6 through a vent valve e and a drain pipe 10.
Further preferably, the water outlet pipe 7 is also provided with a pressure gauge b positioned between the cleaning pump a and the cartridge filter 4, and the pressure gauge b is in signal connection with a control system.
Further preferably, the cleaning solution outlets of the reverse osmosis membrane shells 5 are respectively provided with a flow meter o adjacent to the downstream side of the outlet valve n-1, and the flow meter o is in signal connection with the control system.
Further preferably, the precision of the cartridge filter 4 is 0.5 μm.
The utility model relates to an offline cleaning system for a reverse osmosis membrane, which adopts the working principle that:
Step 1: preparing alkaline cleaning liquid, adding a certain amount of alkaline solute (such as sodium hydroxide, potassium hydroxide and the like) into an alkaline solvent tank 2, adding a certain amount of desalted water into the alkaline solvent tank 2, observing the amount of the desalted water added into the alkaline solvent tank 2 through a liquid level meter f on the alkaline solvent tank 2, starting a cleaning pump a, a liquid outlet valve d and a liquid distribution circulating valve k on the alkaline solvent tank 2 through a control system, enabling solvent and solute mixed liquid in the alkaline solvent tank 2 to be quickly and uniformly mixed through the cleaning pump a and the liquid distribution circulating valve k to form alkaline cleaning liquid, and then closing the cleaning pump a, the liquid outlet valve d and the liquid distribution circulating valve k on the alkaline solvent tank 2;
Step 2: setting alkaline washing time through a control system, starting a cleaning pump a, a liquid outlet valve d on an alkaline solvent tank 2, an inlet valve m, an outlet valve n-1 and a cleaning liquid reflux valve j on a reverse osmosis membrane shell 5 to be cleaned, wherein alkaline cleaning liquid flowing out of the interior of the alkaline solvent tank 2 enters the corresponding reverse osmosis membrane shell 5 through a water outlet pipe 7 to carry out alkaline washing on a reverse osmosis membrane, the alkaline cleaning liquid flowing out of the reverse osmosis membrane shell 5 returns to the interior of the alkaline solvent tank 2 through a reflux pipe 8, and whether the reverse osmosis membrane in the reverse osmosis membrane shell 5 is thoroughly cleaned or not can be judged by observing a flow meter o on the corresponding reverse osmosis membrane shell 5, if the alkaline washing time is not thoroughly prolonged, and after the set alkaline washing time is reached, the cleaning pump a, the liquid outlet valve d on the alkaline solvent tank 2, the inlet valve m, the outlet valve n-1 and the cleaning liquid reflux valve j on the reverse osmosis membrane shell 5 are closed;
Step 3: setting water washing time through a control system, starting a liquid outlet valve d, a cleaning pump a on a desalting water tank 1, an inlet valve m and an outlet valve n-2 on a reverse osmosis membrane shell 5, enabling desalted water flowing out of the interior of the desalting water tank 1 to enter the corresponding reverse osmosis membrane shell 5 through a water outlet pipe 7 to wash a reverse osmosis membrane, enabling cleaning wastewater flowing out of the reverse osmosis membrane shell 5 to flow into an underground collecting tank 6 through a water outlet pipe 9, and closing the liquid outlet valve d, the cleaning pump a on the desalting water tank 1, the inlet valve m and the outlet valve n-2 on the reverse osmosis membrane shell 5 after the set water washing time is reached;
step 4: preparing an acid cleaning solution, adding a certain amount of acid solute (such as sodium citrate) into the acid solvent tank 3, adding a certain amount of desalted water into the acid solvent tank 3, observing the amount of the desalted water added into the acid solvent tank 3 through a liquid level meter f on the acid solvent tank 3, starting a cleaning pump a, a liquid outlet valve d and a liquid preparation circulating valve k on the acid solvent tank 3 through a control system, enabling a solvent and solute mixed liquid in the acid solvent tank 3 to be quickly and uniformly mixed through the cleaning pump a and a liquid preparation return pipe 11 to form the acid cleaning solution, and then closing the cleaning pump a, the liquid outlet valve d and the liquid preparation circulating valve k on the acid solvent tank 3;
Step 5, setting pickling time through a control system, starting a cleaning pump a, a liquid outlet valve d on an acid solvent tank 3, an inlet valve m and an outlet valve n-1 on a reverse osmosis membrane shell 5 to be cleaned and a cleaning liquid reflux valve j on the acid solvent tank 3, enabling acid cleaning liquid flowing out of the inside of the acid solvent tank 3 to enter the corresponding reverse osmosis membrane shell 5 through a water outlet pipe 7 to carry out pickling on a reverse osmosis membrane, returning the acid cleaning liquid flowing out of the reverse osmosis membrane shell 5 to the inside of the acid solvent tank 3 through a reflux pipe 8, judging whether the reverse osmosis membrane in the reverse osmosis membrane shell 5 is thoroughly cleaned or not through observing a flow meter o on the corresponding reverse osmosis membrane shell 5, and if the pickling time is not thoroughly prolonged, closing the cleaning pump a, the liquid outlet valve d on the acid solvent tank 3, the inlet valve m and the outlet valve n-1 on the reverse osmosis membrane shell 5 to be cleaned and the cleaning liquid reflux valve j on the acid solvent tank 3 after the pickling time is set;
Step 6: the water washing time is set through the control system, a liquid outlet valve d, a cleaning pump a on the desalting water tank 1, an inlet valve m and an outlet valve n-2 on the reverse osmosis membrane shell 5 are started, desalted water flowing out of the inside of the desalting water tank 1 enters the corresponding reverse osmosis membrane shell 5 through a water outlet pipe 7 to wash the reverse osmosis membrane, cleaning wastewater flowing out of the reverse osmosis membrane shell 5 flows into an underground collecting tank 6 through a water outlet pipe 9, after the set water washing time is reached, the liquid outlet valve d, the cleaning pump a on the desalting water tank 1, the inlet valve m and the outlet valve n-2 on the reverse osmosis membrane shell 5 are closed, and one cleaning period of the reverse osmosis membrane shell 5 is completed.
The offline cleaning system for the reverse osmosis membrane has the advantages that the reverse osmosis membrane shells are designed to be single-support membrane shells, a plurality of reverse osmosis membranes can be cleaned simultaneously, individual reverse osmosis membranes can be cleaned independently, the flow speed, the flow rate and the water inlet pressure of a chemical cleaning process can be controlled accurately, each reverse osmosis membrane can be thoroughly cleaned, the cleaning effect is good, the cleaning efficiency is high, and the cleaned reverse osmosis membranes have good reverse osmosis performance; flushing water in the cleaning process is discharged into an underground collecting tank, so that pollution to the environment caused by direct discharge is avoided; the whole structure is simple and compact in design, reasonable in layout, high in application and implementation feasibility and high in practicability.
The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that it will be apparent to those skilled in the art that several modifications and variations can be made without departing from the technical principle of the present utility model, and these modifications and variations should also be regarded as the scope of the utility model.
Claims (9)
1. An off-line cleaning system for a reverse osmosis membrane is characterized by comprising a desalting water tank (1), an alkaline solvent tank (2), an acid solvent tank (3), a security filter (4), a plurality of reverse osmosis membrane shells (5), an underground collecting tank (6) and a control system, wherein the reverse osmosis membrane shells (5) are all single-support membrane shells, the desalting water tank (1), the alkaline solvent tank (2) and the acid solvent tank (3) are respectively externally connected with desalted water, a liquid outlet of the desalting water tank (1), a liquid outlet of the alkaline solvent tank (2) and a liquid outlet of the acid solvent tank (3) are respectively connected with a liquid inlet end of the security filter (4) through a liquid outlet valve (d) and a water outlet pipe (7), the liquid outlet end of the security filter (4) is respectively connected with a cleaning liquid inlet pipeline of the plurality of the shells (5) through an inlet valve (m), a cleaning liquid outlet of the reverse osmosis membrane shells (5) is respectively connected with a reverse osmosis membrane flow port on the alkaline solvent tank (2) and a reverse osmosis membrane return port on the acid solvent tank (3) through an outlet valve (n-1) and a return pipe (8), the cleaning liquid outlet of the reverse osmosis membrane shells (5) are respectively connected with a cleaning liquid inlet pipeline of the security filter (5) through a water outlet valve (n-9), the water outlet pipe (7) is also provided with a cleaning pump (a) positioned at the downstream side of the liquid outlet valve (d), a reflux port on the alkaline solvent tank (2) and a reflux port on the acid solvent tank (3) are respectively provided with a cleaning liquid reflux valve (j), and the cleaning pump (a), the liquid outlet valve (d), the inlet valve (m), the first outlet valve (n-1), the second outlet valve (n-2) and the cleaning liquid reflux valve (j) are respectively connected with a control system through signals.
2. The offline cleaning system for reverse osmosis membrane according to claim 1, wherein the liquid outlet of the alkaline solvent tank (2) is further communicated with the reflux inlet at the top of the alkaline solvent tank (2) through the cleaning pump (a) and the liquid distribution reflux pipe (11), the liquid outlet of the acidic solvent tank (3) is further communicated with the reflux inlet at the top of the acidic solvent tank (3) through the cleaning pump (a) and the liquid distribution reflux pipe (11), and the reflux inlet at the top of the alkaline solvent tank (2) and the reflux inlet at the top of the acidic solvent tank (3) are respectively provided with a liquid distribution circulation valve (k).
3. The offline cleaning system for reverse osmosis membranes according to claim 2, wherein the alkaline solvent tank (2) is externally connected with hot steam through a steam main valve (h), an electric valve (i) and a steam pipeline, the liquid distribution return pipe (11) is provided with a temperature controller (g), the temperature controller (g) and the electric valve (i) are both in signal connection with a control system, and the temperature controller (g) and the electric valve (i) are in linkage.
4. An off-line cleaning system for reverse osmosis membranes according to claim 3, characterized in that a PH meter (c) in signal connection with the control system is provided on the pipe between the outlet end of the cartridge filter (4) and the cleaning liquid inlet of the reverse osmosis membrane housing (5).
5. The offline cleaning system for reverse osmosis membranes according to claim 4, wherein the demineralized water tank (1), the alkaline solvent tank (2) and the acidic solvent tank (3) are respectively provided with a liquid level meter (f).
6. The off-line cleaning system for reverse osmosis membrane according to claim 5, wherein the vent of the demineralized water tank (1), the vent of the alkaline solvent tank (2) and the vent of the acidic solvent tank (3) are connected to the underground collection tank (6) through a vent valve (e) and a drain pipe (10), respectively.
7. The off-line cleaning system for reverse osmosis membrane according to claim 6, wherein the water outlet pipe (7) is further provided with a pressure gauge (b) located between the cleaning pump (a) and the cartridge filter (4), and the pressure gauge (b) is in signal connection with the control system.
8. The offline cleaning system for reverse osmosis membranes according to any one of claims 1 to 7, characterized in that the cleaning solution outlets of several reverse osmosis membrane housings (5) are respectively provided with a flow meter (o) adjacent to the downstream side of outlet valve one (n-1), said flow meter (o) being in signal connection with the control system.
9. An off-line cleaning system for reverse osmosis membranes according to claim 8, characterized in that the precision of the cartridge filter (4) is 0.5 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322830002.0U CN220900044U (en) | 2023-10-23 | 2023-10-23 | Offline cleaning system for reverse osmosis membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322830002.0U CN220900044U (en) | 2023-10-23 | 2023-10-23 | Offline cleaning system for reverse osmosis membrane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220900044U true CN220900044U (en) | 2024-05-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322830002.0U Active CN220900044U (en) | 2023-10-23 | 2023-10-23 | Offline cleaning system for reverse osmosis membrane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220900044U (en) |
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2023
- 2023-10-23 CN CN202322830002.0U patent/CN220900044U/en active Active
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