A reverse osmosis membrane system with automatic cleaning function

Abstract

The present invention discloses a reverse osmosis membrane system with an automatic cleaning function. The system determines whether the reverse osmosis membrane system needs cleaning by collecting real-time operation data of the reverse osmosis membrane system. When cleaning is needed, the system controls a cleaning component to clean the reverse osmosis membrane system in time, thereby effectively restoring the membrane flux, extending the service life of the membrane system, and effectively avoiding manual operation errors and possible irreversible damage to the membrane components.

Description

Technical Field

[0001] The invention relates to the technical field of water treatment, and in particular to a reverse osmosis membrane system with an automatic cleaning function. Background Art

[0002] Reverse osmosis technology is a new high-tech that has emerged in the past two decades. It uses the reverse osmosis principle and a highly selective reverse osmosis membrane to effectively remove residual CODcr and NH3-N in the water. It can also remove various organic matter and particles in the water without pollution, making the effluent quality better.

[0003] At present, reverse osmosis technology is gradually being adopted in the field of difficult wastewater treatment (difficult to degrade, high emission requirements). Compared with traditional methods, it has the advantages of high efficiency, low energy consumption, simple process, small footprint, and no secondary pollution. It is widely used in the treatment of landfill leachate and has achieved good results.

[0004] However, the great challenge facing reverse osmosis technology is the problem of membrane contamination. During operation, there are various forms of substances that can cause reverse osmosis surface contamination, such as hydrated metal oxides, calcium-containing precipitates, organic matter and organisms. Various sediments covering the membrane surface will block the membrane pores, reduce membrane flux, shorten the membrane life, increase energy consumption and operating costs. At the same time, due to the high purchase cost of the reverse osmosis membrane system and high requirements for operation, maintenance and cleaning, improper operation, maintenance and cleaning can easily shorten the service life of the reverse osmosis membrane components. Summary of the invention

[0005] The present invention provides a reverse osmosis membrane system with an automatic cleaning function, which is used to solve the technical problems of short service life and high operation and maintenance cost of the existing reverse osmosis membrane system due to membrane pollution.

[0006] In order to solve the above technical problems, the technical solution proposed by the present invention is:

[0007] A reverse osmosis membrane system with automatic cleaning function, comprising: a collection component, a reverse osmosis membrane component, a cleaning component and a control component; the reverse osmosis membrane component comprises a plurality of reverse osmosis membrane units connected in sequence, and the concentrate inlet of each reverse osmosis membrane unit is connected to the liquid inlet of the reverse osmosis membrane unit downstream thereof; the cleaning component comprises a cleaning liquid inlet and a cleaning liquid outlet, and the cleaning liquid outlet is connected to the liquid inlet pipeline of the reverse osmosis membrane component; the water outlet of each level of the reverse osmosis membrane unit is connected to the cleaning liquid inlet pipeline; the concentrate inlet of the reverse osmosis membrane unit at the end of the reverse osmosis membrane component is connected to the cleaning liquid inlet pipeline; the control component establishes communication with the collection component and the cleaning component respectively;

[0008] The acquisition component is used to collect real-time operation data of the reverse osmosis membrane system and send the real-time operation data to the control component;

[0009] The control component is used to determine whether the reverse osmosis membrane system needs to be cleaned according to the real-time operation data. If it is determined that cleaning is required, the cleaning liquid outlet and the cleaning liquid outlet of the cleaning component are opened to control the cleaning component to clean multiple reverse osmosis membrane units.

[0010] Preferably, the cleaning component comprises: an acid chemical cleaning agent storage tank, an alkaline chemical cleaning agent storage tank, an acid dosing pump, an alkaline dosing pump, a cleaning tank, a cleaning pump, a cleaning valve, a water supply valve, a cleaning drain valve, a cleaning water production valve and a cleaning concentrated water valve; the acid chemical cleaning agent storage tank is connected to the cleaning tank through the acid dosing pump; the alkaline chemical cleaning agent storage tank is connected to the cleaning tank through the alkaline dosing pump; the cleaning tank is connected to an external tap water pipeline through the water supply valve, the liquid outlet of the cleaning tank is connected to the liquid inlet pipeline of the cleaning pump, and the cleaning pumps are respectively It is connected to the first end of the cleaning valve, and the second end of the cleaning valve is connected to the liquid inlet pipeline of the first-stage reverse osmosis membrane unit; the first end of the cleaning water production valve is connected to the cleaning liquid inlet of the cleaning tank, and the second end is connected to the water production outlet pipeline of each reverse osmosis membrane unit; one end of the cleaning concentrated water valve is connected to the cleaning liquid inlet of the cleaning tank, and the other end is connected to the concentrated water outlet pipeline of the final reverse osmosis membrane unit; the signal ends of the acid dosing pump, alkaline dosing pump, cleaning pump, water replenishment valve, cleaning drain valve, cleaning valve, cleaning water production valve and cleaning concentrated water valve are all connected to the signal end of the control component.

[0011] Preferably, a cleaning liquid level meter, a cleaning agitator, a cleaning pH meter and a cleaning thermometer are also provided in the cleaning tank, and the signal ends of the cleaning liquid level meter, the cleaning agitator, the cleaning pH meter and the cleaning thermometer are all connected to the signal end of the control component. The cleaning liquid level meter is used to measure the liquid level height of the cleaning tank and send the measured liquid level height to the control component; the cleaning thermometer is used to measure the temperature of the cleaning tank and send the measured temperature to the control component.

[0012] Preferably, the reverse osmosis membrane assembly includes: an inlet tank, an inlet pump, an inlet valve, a security filter, a high-pressure pump, a first circulation pump; a first reverse osmosis membrane unit, a second reverse osmosis membrane unit, a second circulation pump, a water production tank and a drainage pump; the liquid outlet of the water inlet tank is connected to the liquid inlet pipeline of the water inlet pump, and the liquid outlet of the water inlet pump is connected to the liquid inlet pipeline of the security filter through the inlet valve; the liquid inlet of the security filter is connected to the cleaning valve pipeline; the liquid outlet of the security filter is connected to the liquid inlet pipeline of the high-pressure pump, and the liquid outlet of the high-pressure pump is respectively connected to the liquid inlet of the first circulation pump and the concentrated water outlet pipeline of the first reverse osmosis membrane unit, and the liquid outlet of the first circulation pump is connected to the water inlet of the first reverse osmosis membrane unit. The first reverse osmosis membrane unit and the second reverse osmosis membrane unit are connected by pipelines; the concentrate outlet of the first reverse osmosis membrane unit is connected to the liquid inlet of the second circulation pump, and the liquid inlet of the second circulation pump is also connected to the concentrate outlet of the second reverse osmosis membrane unit; the liquid outlet of the second circulation pump is connected to the liquid inlet of the second reverse osmosis membrane unit, the concentrate outlet of the second reverse osmosis membrane unit is connected to the cleaning liquid inlet pipeline of the cleaning tank through a concentrate electric regulating valve, and the concentrate outlet of the second reverse osmosis membrane unit is connected to the concentrate discharge valve through a concentrate electric regulating valve; the water production outlet of the first reverse osmosis membrane unit and the water production outlet of the second reverse osmosis membrane unit are both connected to the water production tank through a water production pipeline, and a water production discharge valve is provided on the water production pipeline, and the liquid outlet of the water production tank is connected to the outside through a drainage pump.

[0013] Preferably, the control component includes a water cleaning mode and a chemical cleaning mode, and the chemical cleaning mode includes: an acid cleaning mode and an alkaline cleaning mode;

[0014] When in water cleaning mode, the control assembly is used to:

[0015] The liquid level height of the cleaning tank is monitored in real time by the cleaning liquid level gauge in the cleaning tank, and the liquid level height is compared with the preset starting liquid level height. When the liquid level height of the cleaning tank reaches the set starting liquid level height, the cleaning valve, the produced water cleaning valve, the concentrated liquid cleaning valve, and the concentrated water electric regulating valve are opened in sequence to 100%, and the valve action interval is N seconds; after confirming that the cleaning valve, the produced water cleaning valve, the concentrated liquid cleaning valve, and the concentrated water electric regulating valve are fully opened, the cleaning pump is delayed to start, the high-pressure pump is delayed to start, and the first circulation pump and the second circulation pump are delayed to start, and the system enters the water cleaning mode;

[0016] In the water cleaning mode, the running time of the water cleaning mode is counted in real time, and the real-time pH value in the cleaning tank is monitored; the running time of the water cleaning mode is compared with a preset water cleaning time threshold, and the monitored real-time pH value is compared with a preset water cleaning pH threshold;

[0017] When the running time of the water cleaning mode reaches the water cleaning time threshold or the real-time pH value reaches the preset water cleaning pH threshold, the first circulation pump and the second circulation pump are sequentially closed with delay, the high-pressure pump is closed with delay, and the cleaning pump is closed with delay. After confirming that each pump is closed, the cleaning valve, the produced water cleaning valve, and the concentrated liquid cleaning valve are closed with delay, and the produced water discharge valve, the concentrated liquid discharge valve, and the cleaning drain valve are opened. After confirming that each device is closed or opened in place, the system is delayed to enter the standby state;

[0018] When in acid cleaning mode, the control assembly is used to:

[0019] Turn on the acid cleaning agent dosing pump, and monitor the real-time pH value of the liquid in the cleaning tank in real time through the cleaning pH meter in the cleaning tank. When the real-time pH value in the cleaning tank is ≤ the lower limit of the acid threshold, the acid cleaning agent dosing pump is automatically turned off. When the real-time pH value is ≥ the upper limit of the acid threshold, the acid cleaning agent dosing pump is automatically turned on. The acid cleaning agent dosing pump is interlocked with the cleaning pH meter to control the pH value in the cleaning tank during the acid chemical cleaning process;

[0020] Open the cleaning valve, the produced water cleaning valve, the concentrated liquid cleaning valve, and the concentrated water electric regulating valve in sequence, and open them 100%, with a valve action interval of N seconds; after confirming that each valve is fully opened, delay the start of the cleaning pump, delay the start of the high-pressure pump, and delay the start of the first circulation pump and the second circulation pump; the system automatically enters the acid cleaning mode, and in the acid cleaning mode, the running time of the acid cleaning mode is counted in real time, and the running time of the acid cleaning mode is compared with the preset acid cleaning time threshold;

[0021] When the running time of the acid cleaning mode reaches the acid cleaning time threshold, the first circulation pump and the second circulation pump are shut down in sequence, the high-pressure pump is shut down in sequence, and the cleaning pump is shut down in sequence. After confirming that all pumps are shut down, the cleaning valve, the produced water cleaning valve, and the concentrated liquid cleaning valve are shut down in sequence, and the produced water discharge valve, the concentrated liquid discharge valve, and the cleaning drain valve are opened. After confirming that all equipment is shut down or opened in place, the system is switched to the water cleaning mode in sequence.

[0022] When in alkaline cleaning mode, the controls are used to:

[0023] Turn on the alkaline cleaning agent dosing pump, and monitor the real-time pH value of the liquid in the cleaning tank in real time through the cleaning pH meter in the cleaning tank. When the real-time pH value in the cleaning tank is ≥ the upper limit of the alkaline pH threshold, the acid cleaning agent dosing pump is automatically turned off. When the pH value in the cleaning tank is ≤ the lower limit of the alkaline pH threshold, the alkaline cleaning agent dosing pump is turned on. The alkaline cleaning agent dosing pump is interlocked with the cleaning pH meter to control the pH value in the cleaning tank during the alkaline cleaning process;

[0024] Open the cleaning valve, produced water cleaning valve, concentrated liquid cleaning valve, and concentrated water electric regulating valve in sequence, and open them 100% at an interval of N seconds.

[0025] After confirming that all valves are fully opened, delay starting the cleaning pump, delay starting the high-pressure pump, and delay starting the first circulation pump and the second circulation pump;

[0026] The system automatically enters an alkaline cleaning mode. In the alkaline cleaning mode, the running time of the alkaline cleaning mode is timed in real time, and the running time of the alkaline cleaning mode is compared with a preset alkaline cleaning time threshold;

[0027] When the running time of the alkaline cleaning mode reaches the alkaline cleaning time threshold, the alkaline chemical cleaning mode shutdown procedure is triggered, and the first circulation pump and the second circulation pump are delayed to be closed in sequence, the high-pressure pump is delayed to be closed, and the cleaning pump is delayed to be closed. After confirming that all pumps are shut down, the cleaning valve, the produced water cleaning valve, and the concentrated liquid cleaning valve are delayed to be closed, and the produced water discharge valve, the concentrated liquid discharge valve, and the cleaning drain valve are opened; after confirming that all equipment is closed or opened in place, the system is delayed to be switched to water cleaning mode.

[0028] Preferably, the acquisition component includes: a first membrane inlet pressure sensor, a second membrane inlet pressure sensor, a first membrane outlet pressure sensor, a second membrane outlet pressure sensor, and a reverse osmosis water production flow meter;

[0029] The first membrane inlet pressure sensor is arranged on the liquid inlet pipe of the first reverse osmosis membrane unit, and is used to monitor the membrane inlet pressure value of the first reverse osmosis membrane unit, and send the membrane inlet pressure value of the first reverse osmosis membrane unit to the control component; the first membrane outlet pressure sensor is arranged on the water production pipe of the first reverse osmosis membrane unit, and is used to monitor the membrane outlet pressure value of the first reverse osmosis membrane unit, and send the membrane outlet pressure value of the first reverse osmosis membrane unit to the control component; the control component is used to calculate the first front-to-back pressure difference of the first reverse osmosis membrane unit according to the membrane inlet pressure value and the membrane outlet pressure value of the first reverse osmosis membrane unit, and compare the first front-to-back pressure difference with a preset pressure difference threshold value, when the first front-to-back pressure difference is greater than the preset pressure difference threshold value for a duration greater than the preset pressure difference time threshold value, when the system is shut down, a dialog box pops up to prompt manual judgment to select the acid cleaning mode or the alkaline cleaning mode, and execute the cleaning mode selected by the user;

[0030] The second membrane inlet pressure sensor is arranged on the liquid inlet pipe of the first reverse osmosis membrane unit, and is used to monitor the membrane inlet pressure value of the second reverse osmosis membrane unit, and send the membrane inlet pressure value of the second reverse osmosis membrane unit to the control component; the second membrane outlet pressure sensor is arranged on the water production pipe of the second reverse osmosis membrane unit, and is used to monitor the membrane outlet pressure value of the second reverse osmosis membrane unit, and send the membrane outlet pressure value of the second reverse osmosis membrane unit to the control component; the control component is used to calculate the first front-to-back pressure difference of the second reverse osmosis membrane unit according to the membrane inlet pressure value and the membrane outlet pressure value of the second reverse osmosis membrane unit, and compare the first front-to-back pressure difference with a preset pressure difference threshold value, when the second front-to-back pressure difference is greater than the preset pressure difference threshold value for a duration greater than the preset pressure difference time threshold value, when the system is shut down, a dialog box pops up to prompt manual judgment to select the acid cleaning mode or the alkaline cleaning mode, and execute the cleaning mode selected by the user;

[0031] The reverse osmosis water production flowmeter is arranged on the water production pipeline, and is used for monitoring the water production flow value, and sending the monitored water production flow value to the control component, and the control component is used for comparing the water production flow value with a preset water production threshold value. When the duration of the water production flow value being less than the preset water production threshold value is greater than the preset water production time threshold value, when the system is shut down, a dialog box pops up to prompt manual judgment to select the acid cleaning mode or the alkaline cleaning mode, and executes the cleaning mode selected by the user.

[0032] Preferably, a water inlet tank level gauge is provided in the water production tank; a water production tank level gauge is provided in the water production tank; a pre-filtration pressure sensor is installed on the water inlet pipe of the security filter, and a post-filtration pressure sensor is installed on the water outlet pipe; an inlet pH meter, an inlet ORP meter and an inlet conductivity meter are installed on the water inlet pipe of the high-pressure pump; a first outlet water rotor flowmeter is installed on the water production pipe of the first reverse osmosis membrane unit; a second outlet water rotor flowmeter is installed on the water production pipe of the second reverse osmosis membrane unit; a water production flowmeter and a water production pressure sensor are provided on the water production pipeline; the water inlet tank level gauge, the water production tank level gauge, the pre-filtration pressure sensor, the post-filtration pressure sensor, the inlet pH meter, the inlet ORP meter, the inlet conductivity meter, the first outlet water rotor flowmeter, the second outlet water rotor flowmeter, the water production flowmeter and the water production pressure sensor all establish communication with the control component.

[0033] Preferably, it also includes: a scale inhibitor component, which includes: a scale inhibitor storage tank, a scale inhibitor dosing pump and a scale inhibitor storage tank level gauge, the liquid outlet of the scale inhibitor storage tank is connected to the liquid inlet of the high-pressure pump through the scale inhibitor dosing pump, and the scale inhibitor storage tank level gauge is installed in the scale inhibitor storage tank and establishes communication with the control component, so as to measure the liquid level height value of the scale inhibitor storage tank and send the liquid level height value of the scale inhibitor storage tank to the control component.

[0034] Preferably, an acid storage component is also included, which includes: an acid storage tank, an acid storage tank level gauge and an acid dosing pump; the liquid outlet of the acid storage tank is connected to the liquid inlet of the high-pressure pump through the acid dosing pump, and the acid storage tank level gauge is installed in the acid storage tank and establishes communication with the control component to measure the liquid level height value of the acid storage tank and send the liquid level height value of the acid storage tank to the control component.

[0035] Preferably, when in automatic operation mode, the control component is used to:

[0036] The liquid level of the water inlet tank is monitored in real time by a water inlet tank level gauge, and the liquid level of the water inlet tank is compared with a preset start-up height threshold. When the liquid level of the water inlet tank reaches the start-up height threshold, the water inlet valve, the produced water discharge valve, the concentrate discharge valve, and the concentrated water electric regulating valve are opened in sequence to 100%;

[0037] After confirming that all valves are fully opened, delay starting the water inlet pump, antiscalant dosing pump, high-pressure pump, first circulation pump and second circulation pump; delay adjusting the opening degree of the concentrated water electric regulating valve to the set pressure or flow range;

[0038] The liquid level of the water production tank is monitored in real time by a water production tank level gauge, and the liquid level of the water production tank is compared with a preset drainage height threshold. When the liquid level of the water production tank reaches the preset drainage height threshold, the drainage pump is turned on to drain the water in the water production tank; the system enters automatic operation mode;

[0039] In the automatic operation mode, the control assembly is also used to:

[0040] The pH value of the liquid pumped by the high-pressure pump is monitored in real time by a water inlet pH meter, and the pH value of the pumped liquid is compared with a preset pH range. When the pH value of the pumped liquid is higher than the upper limit of the pH range, the acid dosing pump is turned on for pH adjustment. When the pH value of the pumped liquid is lower than the lower limit of the pH range, the system automatically turns off the acid dosing pump.

[0041] The liquid level of the acid storage tank is monitored in real time by an acid storage tank level gauge, and the liquid level of the acid storage tank is compared with a preset acid storage level threshold. When the liquid level of the acid storage tank is lower than the acid storage level threshold, an alarm signal is issued to prompt manual dosing. When the liquid level of the acid storage tank is lower than the acid storage level threshold for a duration greater than or equal to the preset duration, the system automatically enters a shutdown procedure. Before the low liquid level alarm of the acid storage tank is eliminated, the system cannot enter an automatic operation mode.

[0042] The liquid level of the antiscalant tank is monitored in real time by the antiscalant tank level gauge. When the liquid level of the antiscalant tank is lower than the preset antiscalant liquid level, an alarm signal is sent to prompt manual dosing. When the liquid level of the antiscalant tank is lower than the preset antiscalant liquid level for a duration greater than or equal to the preset duration, the system automatically enters the shutdown procedure. Before the low liquid level alarm of the antiscalant tank is eliminated, the system cannot enter the automatic operation mode.

[0043] Calculate the pressure difference before and after filtration of the pre-filtration pressure sensor and the post-filtration pressure sensor, and compare the pre-filtration pressure difference with the preset filtration pressure difference threshold. When the pre-filtration pressure difference is ≥ the filtration pressure difference threshold, issue an alarm signal to prompt manual replacement of the filter element. When the pre-filtration pressure difference is lower than the filtration pressure difference threshold for a duration ≥ the preset water production time, the system automatically enters the shutdown procedure. Before the pre-filtration pressure difference alarm is eliminated, the system cannot enter the automatic operation state.

[0044] The inlet water ORP value is detected in real time by an inlet water ORP meter, and the inlet water ORP value is compared with a preset ORP threshold value. When the inlet water ORP value is higher than the ORP threshold value, an alarm signal is issued to prompt manual adjustment;

[0045] The pressure of the water production side is detected in real time by the water production pressure sensor, and the pressure of the water production side is compared with the preset water production pressure threshold. When the pressure of the water production side is higher than the preset water production pressure threshold, the system enters the shutdown procedure. Before the water production pressure alarm is eliminated, the system cannot enter the automatic operation state;

[0046] The produced water conductivity on the produced water side is detected in real time by a produced water conductivity instrument, and the produced water conductivity is compared with a preset produced water conductivity threshold. When the reverse osmosis produced water conductivity meter shows that the produced water conductivity is higher than the set produced water conductivity value for a duration ≥ the preset water production time, the system automatically enters the shutdown procedure. Before the produced water conductivity alarm is eliminated, the system cannot enter the automatic operation state;

[0047] The liquid level of the water inlet tank is monitored in real time by a water inlet tank level gauge, and the liquid level of the water inlet tank is compared with a preset shutdown height threshold. When the liquid level of the water inlet tank is lower than the shutdown height threshold, the system enters a shutdown procedure;

[0048] When entering the shutdown procedure, the control component is used to:

[0049] Open the concentrated water electric regulating valve 100%, concentrated water discharge valve and produced water discharge valve in sequence;

[0050] After confirming that all valves are fully opened, delay closing the first circulation pump and the second circulation pump; delay closing the high-pressure pump, delay closing the water inlet pump and the antiscalant dosing pump; after confirming that all pumps are closed, delay closing the water inlet valve; after confirming that all equipment is fully closed, delay switching the system to standby mode.

[0051] The present invention has the following beneficial effects:

[0052] 1. The reverse osmosis membrane system with automatic cleaning function in the present invention determines whether the reverse osmosis membrane system needs to be cleaned by collecting real-time operation data of the reverse osmosis membrane system, and when cleaning is needed, controls the cleaning component to clean the reverse osmosis membrane system in time, thereby effectively restoring the membrane flux, extending the service life of the membrane system, and effectively avoiding manual operation errors and possible irreversible damage to the membrane components.

[0053] 2. In the preferred embodiment, the present invention automatically and intelligently controls the operation, chemical cleaning time, chemical cleaning cycle and other operation control parameters of the reverse osmosis membrane system through real-time collection and analysis of the reverse osmosis membrane system operation data, timely cleans the membrane treatment system, effectively restores the membrane flux, prolongs the service life of the membrane system, effectively avoids manual operation errors and possible irreversible damage to the membrane components. The reverse osmosis system of the present invention realizes automated operation to the maximum extent, reduces manual operation, facilitates maintenance, greatly reduces management difficulty and manpower investment; enables the reverse osmosis membrane system to maintain a high water production flux for a long time, reduces energy consumption to a certain extent, and reduces operating costs; realizes online cleaning of the reverse osmosis membrane system, avoids the reverse osmosis membrane components being hoisted out for offline cleaning, reduces the occurrence of broken wires, increases the stability of the reverse osmosis membrane system operation, and reduces the floor space. The real-time monitoring of the water quality of the produced water by the control component effectively ensures the water quality of the reverse osmosis system operation, and provides a strong guarantee for the discharge of effluent meeting the standards.

[0054] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0056] Figure 1 A process flow chart of a reverse osmosis membrane system with automatic cleaning function provided by an embodiment of the present invention;

[0057] Figure 2 A process principle diagram of a reverse osmosis membrane system with automatic cleaning function provided by an embodiment of the present invention;

[0058] Note in the figure:

[0059] 1. Water inlet tank; 2. Water inlet tank level gauge; 3. Water inlet pump; 4. Water inlet valve; 5. Alkaline cleaning agent storage tank; 6. Alkaline cleaning agent storage tank level gauge; 7. Alkaline cleaning agent dosing pump; 8. Acid cleaning agent storage tank; 9. Acid cleaning agent storage tank level gauge;

[0060] 10. Acid cleaning agent dosing pump; 11. Cleaning tank; 12. Cleaning tank level gauge; 13. Water supply valve; 14. Cleaning PH meter; 15. Cleaning thermometer; 16. Antiscalant storage tank; 17. Antiscalant storage tank level gauge; 18. Antiscalant dosing pump; 19. Security filter;

[0061] 20. Pressure sensor before filtration; 21. Pressure sensor after filtration; 22. Cleaning valve; 23. Cleaning pump; 24. Cleaning drain valve; 25. Acid storage tank; 26. Acid storage tank level gauge; 27. Acid dosing pump; 28. Inlet flow meter; 29. ​​Inlet pH meter;

[0062] 30. Inlet ORP meter; 31. Inlet conductivity meter; 32. High-pressure pump; 33. First circulation pump; 34. First membrane inlet pressure sensor; 35. First spiral reverse osmosis membrane shell and membrane assembly; 36. First membrane outlet pressure sensor; 37. First outlet rotor flowmeter; 38. Second circulation pump; 39. Second membrane inlet pressure sensor;

[0063] 40. Second roll-type reverse osmosis membrane shell and membrane assembly; 41. Second membrane outlet pressure sensor; 42. Second water outlet rotor flowmeter; 43. Total water production flowmeter; 44. Water production conductivity meter; 45. Water production pressure sensor; 46. Water production cleaning valve; 47. Water production discharge valve; 48. Concentrate electric regulating valve; 49. Concentrate flowmeter;

[0064] 50. Concentrated water pressure sensor; 51. Concentrated liquid discharge valve; 52. Concentrated liquid cleaning valve; 53. Water production tank; 54. Water production drain valve; 55. Discharge pump; 56. Water production tank level gauge. DETAILED DESCRIPTION

[0065] The embodiments of the present invention are described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways as defined and covered by the claims.

[0066] Embodiment 1:

[0067] The present embodiment discloses a reverse osmosis membrane system with automatic cleaning function, comprising: a collection component, a reverse osmosis membrane component, a cleaning component and a control component; the reverse osmosis membrane component comprises a plurality of reverse osmosis membrane units connected in sequence, and the concentrate inlet of each reverse osmosis membrane unit is connected to the liquid inlet of the reverse osmosis membrane unit downstream thereof; the cleaning component comprises a cleaning liquid inlet and a cleaning liquid outlet, and the cleaning liquid outlet is connected to the liquid inlet pipeline of the reverse osmosis membrane component; the water outlet of each level of the reverse osmosis membrane unit is connected to the cleaning liquid inlet pipeline; the concentrate inlet of the reverse osmosis membrane unit at the end of the reverse osmosis membrane component is connected to the cleaning liquid inlet pipeline; the control component establishes communication with the collection component and the cleaning component respectively;

[0068] The acquisition component is used to collect real-time operation data of the reverse osmosis membrane system and send the real-time operation data to the control component;

[0069] The control component is used to determine whether the reverse osmosis membrane system needs to be cleaned according to the real-time operation data. If it is determined that cleaning is required, the cleaning liquid outlet and the cleaning liquid outlet of the cleaning component are opened to control the cleaning component to clean multiple reverse osmosis membrane units.

[0070] The present invention can determine whether the reverse osmosis membrane system needs to be cleaned by collecting real-time operation data of the reverse osmosis membrane system, and when cleaning is needed, control the cleaning component to clean the reverse osmosis membrane system in time, thereby effectively restoring the membrane flux, extending the service life of the membrane system, and effectively avoiding manual operation errors and possible irreversible damage to the membrane components.

[0071] Embodiment 2:

[0072] Embodiment 2 is a preferred embodiment of Embodiment 1. The difference between Embodiment 2 and Embodiment 1 is that the specific structure of the reverse osmosis membrane system with automatic cleaning function is introduced:

[0073] like Figure 1-2 As shown, this embodiment discloses a reverse osmosis membrane system with automatic cleaning function, including a rolled reverse osmosis membrane shell and membrane assembly, a water inlet tank 1, a water inlet pump 3, a security filter 19, a high-pressure pump 32, a circulation pump, a water production tank 53, a cleaning tank 11, a cleaning pump 23, an acid cleaning agent storage tank 8, an alkaline cleaning agent storage tank 5, an antiscalant storage tank 16, an acid storage tank 25 and a control component; the control component includes a computer and a process controller, and the computer and the input end are electrically connected to the process controller;

[0074] The water inlet tank 1 is connected to the water inlet pump 3 through a pipeline, and a water inlet valve 4 is arranged on the water inlet pipeline, and the water inlet valve 4 is connected to the security filter 19, the high-pressure pump 32, the circulation pump, the roll-type reverse osmosis membrane shell and the membrane assembly through the water inlet pipeline; the water inlet tank 1 is provided with a water inlet tank level gauge 2 for detecting the liquid level and a water inlet emptying valve for emptying, and the water inlet tank level gauge 2, the water inlet emptying valve, the water inlet pump 3, the water inlet valve 4, the high-pressure pump 32, and the circulation pump are all electrically connected to the control component;

[0075] The water inlet pipeline security filter 19 is provided with a pre-filtration pressure sensor 20 and a post-filtration pressure sensor 21 for detecting the filter performance; the water inlet pipeline is also provided with a water inlet pH meter 29, a water inlet ORP meter 30, a water inlet conductivity meter 31 for detecting water quality, and a water inlet flow meter 28 for detecting flow rate. The pre-filtration pressure sensor 20, the post-filtration pressure sensor 21, the water inlet pH meter 29, the water inlet ORP meter 30, the water inlet conductivity meter 31, and the water inlet flow meter 28 are electrically connected to the control component; the filtration accuracy of the security filter 19 is ≤5um, and a core-type security filter 19 is selected. When the pressure difference before and after filtration is ≥1.0bar, the control component can automatically pop up an alarm to prompt the replacement of the filter element;

[0076] The water inlet pipeline is also provided with an antiscalant dosing device and an acid dosing device, the antiscalant dosing device comprises an antiscalant dosing pump 18, an antiscalant storage tank 16 and an antiscalant storage tank level gauge 17, the antiscalant storage tank 16 and the antiscalant dosing pump 18 are connected to the water inlet pipeline through a pipeline; the acid dosing device comprises an acid dosing pump 27, an acid storage tank 25 and an acid storage tank level gauge 26, the acid storage tank 25 and the acid dosing pump 27 are connected to the water inlet pipeline through a pipeline; the antiscalant dosing pump 18, the antiscalant storage tank level gauge 17, the acid dosing pump 27, the acid storage tank 25 and the acid dosing pump 27 are connected to the water inlet pipeline through a pipeline The tank level gauges 26 are all electrically connected to the control component; when the liquid levels of the antiscalant tank 16 and the acid tank 25 are lower than the set values, the control component will send out an alarm signal to prompt manual dosing; the antiscalant tank level gauge 17 and the acid tank level gauge 26 are ultrasonic level gauges with strong corrosion resistance and high precision, and the antiscalant is a special antiscalant; the acid is industrial grade concentrated hydrochloric acid or concentrated sulfuric acid; the acid dosing pump 27 is interlocked with the inlet pH meter 29 to control the start and stop of the acid dosing pump 27 by setting the inlet pH value range of the inlet water through the inlet pH meter 29;

[0077] The number of circulating pumps is set to a first circulating pump 33 and a second circulating pump 38 according to the processing scale requirements; the number of the rolled reverse osmosis membrane shell and membrane assembly is set to a first rolled reverse osmosis membrane shell and membrane assembly 35 (i.e., a first reverse osmosis membrane unit) and a second rolled reverse osmosis membrane shell and membrane assembly 40 (i.e., a second reverse osmosis membrane unit) according to the processing scale requirements, the first circulating pump 33 is connected to the first rolled reverse osmosis membrane shell and membrane assembly 35 through an inlet pipeline, the second circulating pump 38 is connected to the second rolled reverse osmosis membrane shell and membrane assembly 40 through an inlet pipeline, and the inlet pipeline connecting the circulating pump and the rolled reverse osmosis membrane shell and membrane assembly is also provided with a first membrane inlet pressure sensor 34 and a second membrane inlet pressure sensor 39 for detecting the membrane inlet pressure; the first circulating pump 33, the second circulating pump 38, the first membrane inlet pressure sensor 34, and the second membrane inlet pressure sensor 39 are all electrically connected to the control assembly;

[0078] The first roll-type reverse osmosis membrane shell and membrane assembly 35, the second roll-type reverse osmosis membrane shell and membrane assembly 40 are connected by a water production pipeline. The first roll-type reverse osmosis membrane shell and membrane assembly 35, the second roll-type reverse osmosis membrane shell and membrane assembly 40 are provided with a first water outlet rotor flowmeter 37 and a second water outlet rotor flowmeter 42 for detecting the water flow of each group of produced water, and a first water outlet sampling valve and a second water outlet sampling valve for each group of manual detection sampling. The water production pipeline is also provided with a total water production flowmeter 43, a water production conductivity meter 44, a water production pressure sensor 45, a water production discharge valve 47, and a water production cleaning valve 46; the water production discharge valve 47 is connected to the water production tank 53 through the water production pipeline, and the water production cleaning valve 46 is connected to the cleaning tank 11 through a pipeline. The total water production flowmeter 43, the water production conductivity meter 44, the water production pressure sensor 45, the water production discharge valve 47, and the water production cleaning valve 46 are all electrically connected to the control component;

[0079] The water production tank 53 is provided with a water production tank level gauge 56 for detecting the liquid level and a water production emptying valve 54 for emptying. The water production tank 53 is connected to the drainage pump through a pipeline. The drainage pump is automatically turned on and off according to the set liquid level of the water production tank 53 to achieve standard discharge. The water production tank level gauge 56, the water production emptying valve 54, and the drainage pump are all electrically connected to the control component;

[0080] The cleaning tank 11 is provided with a cleaning tank level gauge 12 for detecting the liquid level and a cleaning drain valve 24 for emptying, a cleaning pH meter 14 and a cleaning thermometer 15 for detecting the pH value of the cleaning tank 11 and the temperature of the cleaning tank 11; the cleaning tank 11 is also provided with a tap water pipeline for replenishing water during cleaning, and the tap water pipeline is connected to the cleaning tank 11 through a water replenishing valve 13; the cleaning tank level gauge 12, the cleaning drain valve 24, the cleaning pH meter 14, the cleaning thermometer 15, and the water replenishing valve 13 are all electrically connected to the control component;

[0081] The cleaning tank 11 and the cleaning pump 23 are connected through a cleaning pipeline, and the cleaning pump 23 is connected to the water inlet pipeline through a pipeline through a cleaning valve 22. The acid cleaning agent storage tank 8 and the alkaline cleaning agent storage tank 5 are respectively connected to the acid cleaning agent dosing pump 10 and the alkaline cleaning agent dosing pump 7 through pipelines with the cleaning tank 11; the acid cleaning agent storage tank 8 and the alkaline cleaning agent storage tank 5 are also provided with an acid cleaning agent storage tank level gauge 9 and an alkaline cleaning agent storage tank level gauge 6 for detecting the liquid level. When the liquid levels of the acid cleaning agent storage tank 8 and the alkaline cleaning agent storage tank 5 are lower than the set value, the control component will send out an alarm signal to prompt manual dosing; the acid cleaning agent storage tank level gauge 9 and the alkaline cleaning agent storage tank level gauge 6 are ultrasonic level gauges with strong corrosion resistance and high precision; the cleaning pump 23, the cleaning valve 22, the acid cleaning agent dosing pump 10, the alkaline cleaning agent dosing pump 7, the acid cleaning agent storage tank level gauge 9, and the alkaline cleaning agent storage tank level gauge 6 are all electrically connected to the control component;

[0082] The first roll-type reverse osmosis membrane shell and membrane assembly 35, the second roll-type reverse osmosis membrane shell and membrane assembly 40 are connected by a concentrated water pipeline, and the first roll-type reverse osmosis membrane shell and membrane assembly 35, the second roll-type reverse osmosis membrane shell and membrane assembly 40 are provided with a first film outlet pressure sensor 36 and a second film outlet pressure sensor 41 for detecting the film outlet pressure respectively; the concentrated water pipeline is also provided with a concentrated water electric regulating valve 48, a concentrated liquid flow meter 49, a concentrated water pressure sensor 50, a concentrated liquid discharge valve 51, and a concentrated liquid cleaning valve 52; the concentrated liquid discharge valve 51 is connected to the concentrated liquid pool through the concentrated water pipeline, and the concentrated liquid cleaning valve 52 is connected to the cleaning tank 11 through a pipeline, and the first film outlet pressure sensor 36, the second film outlet pressure sensor 41, the concentrated water electric regulating valve 48, the concentrated liquid flow meter 49, the concentrated water pressure sensor 50, the concentrated liquid discharge valve 51, and the concentrated liquid cleaning valve 52 are all electrically connected to the control component;

[0083] In this embodiment, the reverse osmosis membrane system includes three operation modes, namely, automatic operation mode, water cleaning mode, and chemical cleaning mode; the operation mode is automatically controlled to start by running a computer software program;

[0084] Among them, the specific steps of automatic operation mode are as follows:

[0085] ①. Press the "Start" button in RO automatic mode; or meet the start conditions in the "Start" state;

[0086] ②, when the liquid level of water inlet tank 1 reaches the set level for starting the reverse osmosis system, the water inlet valve 4, the produced water discharge valve 47, the concentrate discharge valve 51, and the concentrated water electric regulating valve 48 are opened in sequence to 100%, and the valve action interval is 3 seconds. (If it is detected that the above valves are not opened, the startup procedure will be terminated and an alarm will be displayed);

[0087] ③. After confirming that all valves are fully opened, start the water inlet pump 3 and the scale inhibitor dosing pump 18 with a delay of 10* seconds, start the high-pressure pump 32 (frequency conversion*50Hz) with a delay of 10* seconds, and start the first circulation pump 33 and the second circulation pump 38 with a delay of 10* seconds; delay the opening of the concentrated water electric regulating valve 48 to adjust to the set pressure or flow range with a delay of 30* seconds (when the opening of the concentrated water electric regulating valve 48 is automatically adjusted by the set pressure, it is interlocked with the concentrated water pressure sensor 50, and the concentrated water pressure setting range is 20~60bar, which is flexibly set according to the actual influent water quality; when the opening of the concentrated water electric regulating valve 48 is automatically adjusted by the set flow, it is interlocked with the concentrated liquid flow meter 49, and the setting range of the concentrated liquid flow meter 49 is flexibly set according to the system processing scale and the actual influent water quality);

[0088] ④. The drainage pump automatically turns on and off according to the high and low liquid levels set in the water production tank 53;

[0089] ⑤. The system enters automatic operation state;

[0090] ⑥. When the reverse osmosis membrane system is in operation mode, the operation of the water inlet pump 3 is interlocked with the scale inhibitor dosing pump 18, that is, when the water inlet pump 3 is running in the operation mode, the scale inhibitor dosing pump 18 is running, and when the water inlet pump 3 is turned off, the scale inhibitor dosing pump 18 is turned off; the scale inhibitor dosing pump 18 uses a corrosion-resistant mechanical diaphragm pump with adjustable flow, and the type and dosage of the scale inhibitor can be flexibly selected and set according to the actual operation conditions; when the liquid level of the scale inhibitor storage tank 16 is lower than the set liquid level, an alarm signal is issued to prompt manual dosing. When the liquid level of the scale inhibitor storage tank 16 is lower than the set liquid level for a duration of ≥1 hour, the system automatically enters the shutdown procedure. Before the low liquid level alarm of the scale inhibitor storage tank 16 is eliminated, the system cannot enter the automatic operation state;

[0091] ⑦. When the inlet pH meter 29 sets the inlet pH value control range to 6.5-7.0 (which can be adjusted according to actual conditions); when the reverse osmosis inlet pH value is detected to be higher than 7.0, the system automatically turns on the acid dosing pump 27 for pH adjustment. When the reverse osmosis inlet pH value is detected to be lower than 6.5, the system automatically turns off the acid dosing pump 27. The acid dosing pump 27 uses a corrosion-resistant mechanical diaphragm pump with adjustable flow. The type and dosage of acid can be flexibly selected and set according to actual operating conditions. When the liquid level of the acid storage tank 25 is lower than the set liquid level, an alarm signal is issued to prompt manual dosing. When the liquid level of the acid storage tank 25 is lower than the set liquid level for a duration of ≥1 hour, the system automatically enters the shutdown procedure. Before the low liquid level alarm of the acid storage tank 25 is eliminated, the system cannot enter the automatic operation state.

[0092] ⑧. When the pressure difference between the pre-filter pressure sensor 20 and the post-filter pressure sensor 21 is ≥1.0 bar, an alarm signal is issued to prompt manual replacement of the filter element. When the pre-filter pressure difference is lower than the set liquid level for ≥24 hours, the system automatically enters the shutdown procedure. Before the pre-filter pressure difference alarm is eliminated, the system cannot enter the automatic operation state;

[0093] ⑨. When the inlet ORP meter 30 sets the inlet ORP value range to 0-100mv (which can be adjusted according to actual conditions), when the inlet ORP value is higher than 100mv, an alarm signal is issued to prompt manual adjustment;

[0094] ⑩. When the produced water pressure sensor 45 shows that the pressure on the produced water side is higher than the set pressure value, the system automatically enters the shutdown procedure. Before the produced water pressure alarm is eliminated, the system cannot enter the automatic operation state;

[0095] When the reverse osmosis water flow meter shows that the water flow rate is lower than the set water flow rate for ≥24 hours, it will automatically prompt you to perform fault inspection or cleaning;

[0096] When the reverse osmosis water conductivity meter 44 shows that the water conductivity is higher than the set water conductivity value, an alarm signal is issued to prompt the user to perform a fault inspection or cleaning. When the reverse osmosis water conductivity meter 44 shows that the water conductivity is higher than the set water conductivity value for a period of ≥24 hours, the system automatically enters the shutdown procedure. Before the water conductivity alarm is eliminated, the system cannot enter the automatic operation state.

[0097] When the pressure difference between the first membrane inlet pressure sensor 34, the second membrane inlet pressure sensor 39 and the first membrane outlet pressure sensor 36, the second membrane outlet pressure sensor 41 is greater than the set value, an alarm signal is issued to prompt manual adjustment or chemical cleaning. When the pressure difference between the first membrane inlet pressure sensor 34, the second membrane inlet pressure sensor 39 and the first membrane outlet pressure sensor 36, the second membrane outlet pressure sensor 41 is greater than the set value for a duration of ≥24 hours, the system automatically enters the shutdown program and pops up a dialog box to prompt chemical cleaning;

[0098] In the automatic operation state, when the liquid level of the water inlet tank 1 reaches the set liquid level for stopping the reverse osmosis system, the system automatically enters the shutdown procedure. When the liquid level of the water inlet tank 1 reaches the set liquid level for starting the reverse osmosis system, the system automatically starts running, and the cycle repeats;

[0099] When any shutdown condition is triggered in the automatic operation state, the system automatically enters the shutdown procedure, opens the concentrated water electric regulating valve 48 100% in sequence, opens the concentrated water discharge valve, the produced water discharge valve 47, and the valve action interval is 3 seconds; after confirming that all valves are fully opened, delay 10* seconds to close the first circulation pump 33 and the second circulation pump 38; delay 30* seconds to close the high-pressure pump 32 (frequency conversion*50Hz), delay 10* seconds to close the water inlet pump 3 and the scale inhibitor dosing pump 18; after confirming that all pumps are closed, delay 10* seconds to close the water inlet valve 4; after confirming that all equipment is fully closed, delay 5* seconds for the system to enter the standby state;

[0100] The specific steps of water cleaning mode are as follows:

[0101] ①. When the reverse osmosis membrane system runs continuously for ≥24 hours in the automatic operation state (the specific time can be flexibly set according to the actual operation situation), the system automatically enters the shutdown procedure and completes the automatic shutdown of the system, triggering the water cleaning mode;

[0102] ②. After each chemical cleaning of the reverse osmosis system is completed and the system automatically shuts down, the system triggers the water cleaning mode;

[0103] ③. When the liquid level of the cleaning tank 11 reaches the set start level, the cleaning valve 22, the produced water cleaning valve 46, the concentrated liquid cleaning valve 52, and the concentrated water electric regulating valve 48 are opened 100% in sequence, and the valve action interval is 3 seconds. (If it is detected that the above valves are not opened, the execution program is terminated and an alarm is displayed);

[0104] ④. After confirming that all valves are fully opened, delay 10* seconds to start the cleaning pump 23, delay 10* seconds to start the high-pressure pump 32 (frequency conversion*35Hz), delay 10* seconds to start the first circulation pump 33 and the second circulation pump 38;

[0105] ⑤. The system automatically enters the water cleaning operation mode. When the water cleaning time reaches the set time or the set pH value, the water cleaning mode shutdown program is triggered, and the first circulation pump 33 and the second circulation pump 38 are automatically closed with a delay of 10* seconds, and the high-pressure pump 32 (frequency conversion*50Hz) is closed with a delay of 30* seconds. The cleaning pump 23 is closed with a delay of 10* seconds. After confirming that all pumps are closed, the cleaning valve 22, the produced water cleaning valve 46, and the concentrated liquid cleaning valve 52 are closed with a delay of 10* seconds, and the produced water discharge valve 47, the concentrated liquid discharge valve 51, and the cleaning drain valve 24 are opened (when the liquid level of the cleaning tank 11 is ≤0m, the cleaning drain valve 24 is automatically closed). After confirming that all equipment is closed or opened in place, the system is delayed for 5* seconds to enter the standby state;

[0106] ⑥. When the cleaning tank 11 does not reach the set liquid level, the water cleaning mode cannot be started to protect the reverse osmosis cleaning pump. When the cleaning tank 11 is lower than the set liquid level in the water cleaning mode, the water replenishment valve 13 is automatically opened to replenish tap water. When the set maximum liquid level is reached, the water replenishment valve 13 is automatically closed to ensure the water cleaning effect;

[0107] The chemical cleaning mode is divided into two programs: acidic chemical cleaning and alkaline chemical cleaning. The computer software program runs to automatically trigger the chemical cleaning mode operation conditions, and a dialog box pops up to prompt manual judgment to select the acidic chemical cleaning or alkaline chemical cleaning program;

[0108] Among them, the specific steps of the acid chemical cleaning procedure are as follows:

[0109] ①. When the reverse osmosis membrane system runs continuously for ≥360 hours in the automatic operation state (the specific time can be flexibly set according to the actual operation situation), the system automatically enters the shutdown program. After the system automatically shuts down, the chemical cleaning mode operation conditions are automatically triggered, and a dialog box pops up to prompt manual judgment to select the acid chemical cleaning program or the alkaline chemical cleaning program. Manual selection determines the acid chemical cleaning program and enters the acid chemical cleaning program;

[0110] ②. When the pressure difference between the first membrane inlet pressure sensor 34, the second membrane inlet pressure sensor 39 and the first membrane outlet pressure sensor 36, the second membrane outlet pressure sensor 41 of the reverse osmosis membrane system is greater than the set value for a duration of ≥24 hours (which can be flexibly set according to the actual operation conditions), the system automatically enters the shutdown program. After the system automatically shuts down, the chemical cleaning mode operation conditions are automatically triggered, and a dialog box pops up to prompt manual judgment to select the acid chemical cleaning program or the alkaline chemical cleaning program. Manual selection determines the acid chemical cleaning program and enters the acid chemical cleaning program;

[0111] ③. When the reverse osmosis water flow meter shows that the water flow rate duration is ≥24 hours (the specific time can be flexibly set according to the actual operation situation) and is lower than the set water flow rate, the system automatically enters the shutdown procedure. After the system automatically shuts down, the chemical cleaning mode operation conditions are automatically triggered, and a dialog box pops up to prompt manual judgment to select the acid chemical cleaning procedure or the alkaline chemical cleaning procedure. Manual selection determines the acid chemical cleaning procedure and enters the acid chemical cleaning procedure;

[0112] ④. When any of the conditions for automatically triggering the chemical cleaning mode appears, a dialog box pops up to prompt manual judgment to select the acid chemical cleaning or alkaline chemical cleaning program. Manual selection determines the acid chemical cleaning program and enters the acid chemical cleaning program; open the water supply valve 13, set the liquid level through the cleaning tank level gauge 12 to control the opening and closing of the cleaning water supply valve 13, and automatically close the cleaning water supply valve 13 when the liquid level in the cleaning tank 11 reaches the set liquid level value;

[0113] ⑤. Turn on the acid cleaning agent dosing pump 10. When the pH value in the cleaning tank 11 is ≤2, the acid cleaning agent dosing pump is automatically turned off. When the pH value in the cleaning tank 11 is ≥3, the acid cleaning agent dosing pump is automatically turned on. The acid cleaning agent dosing pump 10 is interlocked with the cleaning pH meter 14 to control the pH value in the cleaning tank 11 during the acid chemical cleaning process.

[0114] ⑥. Open the cleaning valve 22, the produced water cleaning valve 46, the concentrated liquid cleaning valve 52, and the concentrated water electric regulating valve 48 in sequence, and open them 100%. The valve action interval is 3 seconds. (If it is detected that the above valves are not opened, the execution program will be terminated and an alarm will be displayed);

[0115] ⑦. After confirming that all valves are fully opened, start the cleaning pump 23 with a delay of 10* seconds, start the high-pressure pump 32 (frequency conversion*35Hz) with a delay of 10* seconds, and start the first circulation pump 33 and the second circulation pump 38 with a delay of 10* seconds;

[0116] ⑧. The system automatically enters the acid chemical cleaning operation mode. When the acid chemical cleaning time reaches the set time, the acid chemical cleaning mode shutdown program is triggered, and the first circulation pump 33 and the second circulation pump 38 are automatically closed with a delay of 10* seconds, and the high-pressure pump 32 (frequency conversion*50Hz) is closed with a delay of 30* seconds. The cleaning pump 23 is closed with a delay of 10* seconds. After confirming that all pumps are closed, the cleaning valve 22, the produced water cleaning valve 46, and the concentrated liquid cleaning valve 52 are closed with a delay of 10* seconds, and the produced water discharge valve 47, the concentrated liquid discharge valve 51, and the cleaning emptying valve 24 are opened (when the liquid level of the cleaning tank 11 is ≤0m, the cleaning emptying valve 24 is automatically closed). After confirming that all equipment is closed or opened in place, the system automatically triggers the water cleaning program with a delay of 5* seconds and enters the water cleaning mode;

[0117] ⑨. When the liquid level of the acid cleaning agent storage tank 8 is lower than the set value, the acid chemical cleaning program cannot be started to ensure the acid chemical cleaning effect. At the same time, an alarm signal pops up automatically to prompt manual dosing. Before the low liquid level alarm of the acid cleaning agent storage tank 8 is eliminated, the system cannot enter the operation mode or chemical cleaning mode;

[0118] ⑩. During the acid chemical cleaning procedure, when the cleaning thermometer 15 is higher than the set value, an alarm signal will pop up automatically to prompt manual intervention. When the cleaning thermometer 15 is higher than the set value for a duration of ≥10 minutes, the emergency shutdown procedure of the acid chemical cleaning mode is triggered, and the first circulation pump 33 and the second circulation pump 38 are automatically shut down with a delay of 10* seconds, the high-pressure pump 32 (frequency conversion*50Hz) is shut down with a delay of 30* seconds, and the cleaning pump 23 is shut down with a delay of 10* seconds, and the acid chemical cleaning emergency standby state is entered. Before the high cleaning temperature alarm is eliminated, the system cannot enter the operation mode or chemical cleaning mode;

[0119] The chemical cleaning mode is divided into two programs: acidic chemical cleaning and alkaline chemical cleaning. The computer software program runs to automatically trigger the chemical cleaning mode operation conditions, and a dialog box pops up to prompt manual judgment to select the acidic chemical cleaning or alkaline chemical cleaning program;

[0120] Among them, the specific steps of the alkaline chemical cleaning procedure are as follows:

[0121] ①. When the reverse osmosis membrane system runs continuously for ≥360 hours in the automatic operation state (the specific time can be flexibly set according to the actual operation situation), the system automatically enters the shutdown program. After the system automatically shuts down, the chemical cleaning mode operation conditions are automatically triggered, and a dialog box pops up to prompt manual judgment to select the acid chemical cleaning or alkaline chemical cleaning program. Manually select and confirm the alkaline chemical cleaning program and enter the alkaline chemical cleaning program;

[0122] ②. When the pressure difference between the first membrane inlet pressure sensor 34, the second membrane inlet pressure sensor 39 and the first membrane outlet pressure sensor 36, the second membrane outlet pressure sensor 41 of the reverse osmosis membrane system is greater than the set value for a duration of ≥24 hours (which can be flexibly set according to the actual operation conditions), the system automatically enters the shutdown program. After the system automatically shuts down, the chemical cleaning mode operation conditions are automatically triggered, and a dialog box pops up to prompt manual judgment to select the acid chemical cleaning program or the alkaline chemical cleaning program. Manual selection determines the alkaline chemical cleaning program and enters the alkaline chemical cleaning program;

[0123] ③. When the reverse osmosis water flow meter shows that the water flow rate duration is ≥24 hours (the specific time can be flexibly set according to the actual operation situation) and is lower than the set water flow rate, the system automatically enters the shutdown procedure. After the system automatically shuts down, the chemical cleaning mode operation conditions are automatically triggered, and a dialog box pops up to prompt manual judgment to select the acid chemical cleaning or alkaline chemical cleaning procedure. Manually select and confirm the alkaline chemical cleaning procedure and enter the alkaline chemical cleaning procedure;

[0124] ④. When any of the conditions for automatically triggering the chemical cleaning mode appears, a dialog box pops up to prompt manual judgment to select the acid chemical cleaning or alkaline chemical cleaning program. Manually select and determine the alkaline chemical cleaning program and enter the alkaline chemical cleaning program; open the water supply valve 13, set the liquid level through the cleaning tank level gauge 12 to control the opening and closing of the cleaning water supply valve 13, and automatically close the cleaning water supply valve 13 when the liquid level in the cleaning tank 11 reaches the set liquid level value;

[0125] ⑤. Turn on the alkaline cleaning agent dosing pump 7. When the pH value in the cleaning tank 11 is ≥11.5, the acid cleaning agent dosing pump is automatically turned off. When the pH value in the cleaning tank 11 is ≤10.5, the alkaline cleaning agent dosing pump is automatically turned on. The alkaline cleaning agent dosing pump 7 is interlocked with the cleaning pH meter 14 to control the pH value in the cleaning tank 11 during the alkaline chemical cleaning process.

[0126] ⑥. Open the cleaning valve 22, the produced water cleaning valve 46, the concentrated liquid cleaning valve 52, and the concentrated water electric regulating valve 48 in sequence, and open them 100%. The valve action interval is 3 seconds. (If it is detected that the above valves are not opened, the execution program will be terminated and an alarm will be displayed);

[0127] ⑦. After confirming that all valves are fully opened, start the cleaning pump 23 with a delay of 10* seconds, start the high-pressure pump 32 (frequency conversion*35Hz) with a delay of 10* seconds, and start the first circulation pump 33 and the second circulation pump 38 with a delay of 10* seconds;

[0128] ⑧. The system automatically enters the alkaline chemical cleaning operation mode. When the alkaline chemical cleaning time reaches the set time, the alkaline chemical cleaning mode shutdown program is triggered, and the first circulation pump 33 and the second circulation pump 38 are automatically closed with a delay of 10* seconds, and the high-pressure pump 32 (frequency conversion*50Hz) is closed with a delay of 30* seconds. The cleaning pump 23 is closed with a delay of 10* seconds. After confirming that all pumps are closed, the cleaning valve 22, the water production cleaning valve 46, and the concentrated liquid cleaning valve 52 are closed with a delay of 10* seconds, and the water production discharge valve 47, the concentrated liquid discharge valve 51, and the cleaning emptying valve 24 are opened (when the liquid level of the cleaning tank 11 is ≤0m, the cleaning emptying valve 24 is automatically closed). After confirming that all equipment is closed or opened in place, the system automatically triggers the water cleaning program with a delay of 5* seconds and enters the water cleaning mode;

[0129] ⑨. When the liquid level of the alkaline cleaning agent storage tank 5 is lower than the set value, the alkaline chemical cleaning program cannot be started to ensure the alkaline chemical cleaning effect. At the same time, an alarm signal pops up automatically to prompt manual dosing. Before the low liquid level alarm of the alkaline cleaning agent storage tank 5 is eliminated, the system cannot enter the operation mode or chemical cleaning mode;

[0130] ⑩. During the acid chemical cleaning procedure, when the cleaning thermometer 15 is higher than the set value, an alarm signal will pop up automatically to prompt manual intervention. When the cleaning thermometer 15 is higher than the set value for a duration of ≥10 minutes, the emergency shutdown procedure of the acid chemical cleaning mode is triggered, and the first circulation pump 33 and the second circulation pump 38 are automatically shut down with a delay of 10* seconds, the high-pressure pump 32 (frequency conversion*50Hz) is shut down with a delay of 30* seconds, and the cleaning pump 23 is shut down with a delay of 10* seconds, and the acid chemical cleaning emergency standby state is entered. Before the high cleaning temperature alarm is eliminated, the system cannot enter the operation mode or chemical cleaning mode;

[0131] Among them, the start-up time interval and chemical cleaning time of the chemical cleaning mode are flexibly set according to the actual operation of the reverse osmosis membrane system, and the types and models of acid and alkaline cleaning agents are manually adjusted and determined according to the actual chemical cleaning effect and water quality. Acidic chemical cleaning and alkaline chemical cleaning are performed alternately to ensure the chemical cleaning effect and maintain the normal operation of the membrane system.

[0132] In summary, the present invention automatically and intelligently controls the operation, chemical cleaning time, chemical cleaning cycle and other operation control parameters of the reverse osmosis membrane system through real-time collection and analysis of the reverse osmosis membrane system operation data, timely cleans the membrane treatment system, effectively restores the membrane flux, and prolongs the service life of the membrane system, effectively avoiding manual operation errors and possible irreversible damage to the membrane assembly. And the reverse osmosis system of the present invention realizes automated operation to the maximum extent, reduces manual operation, is easy to maintain, and greatly reduces the difficulty of management and manpower input; it can enable the reverse osmosis membrane system to maintain a high water production flux for a long time, reduces energy consumption to a certain extent, and reduces operating costs; it realizes online cleaning of the reverse osmosis membrane system, avoids the reverse osmosis membrane assembly being hoisted out for offline cleaning, reduces the occurrence of broken wires, increases the stability of the reverse osmosis membrane system operation, and reduces the floor space at the same time. Through the real-time monitoring of the water quality of the produced water by the control component, the water quality of the reverse osmosis system operation is effectively guaranteed, providing a strong guarantee for the discharge of effluent meeting the standards.

[0133] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A reverse osmosis membrane system with automatic cleaning function, It is characterized in that include: A collection component, a reverse osmosis membrane component, a cleaning component and a control component; the reverse osmosis membrane component includes a plurality of reverse osmosis membrane units connected in sequence, and the concentrated water port of each reverse osmosis membrane unit is connected to the liquid inlet of the reverse osmosis membrane unit downstream thereof; the cleaning component includes a cleaning liquid inlet and a cleaning liquid outlet, and the cleaning liquid outlet is connected to the liquid inlet pipeline of the reverse osmosis membrane component; the water outlet of each level of the reverse osmosis membrane unit is connected to the cleaning liquid inlet pipeline; the concentrated water port of the reverse osmosis membrane unit at the end of the reverse osmosis membrane component is connected to the cleaning liquid inlet pipeline; the control component establishes communication with the collection component and the cleaning component respectively; The acquisition component is used to collect real-time operation data of the reverse osmosis membrane system and send the real-time operation data to the control component; The control component is used to determine whether the reverse osmosis membrane system needs to be cleaned according to the real-time operation data, and if it is determined that cleaning is needed, open the cleaning liquid outlet and the cleaning liquid outlet of the cleaning component to control the cleaning component to clean the multiple reverse osmosis membrane units; The reverse osmosis membrane assembly includes: an inlet tank, an inlet pump, an inlet valve, a security filter, a high-pressure pump, a first circulation pump, a first reverse osmosis membrane unit, a second reverse osmosis membrane unit, a second circulation pump, a water production tank and a drainage pump; the liquid outlet of the water inlet tank is connected to the liquid inlet pipeline of the water inlet pump, and the liquid outlet of the water inlet pump is connected to the liquid inlet pipeline of the security filter through the inlet valve; the liquid inlet of the security filter is connected to the cleaning valve pipeline; the liquid outlet of the security filter is connected to the liquid inlet pipeline of the high-pressure pump, and the liquid outlet of the high-pressure pump is respectively connected to the liquid inlet of the first circulation pump and the concentrated water outlet pipeline of the first reverse osmosis membrane unit, and the liquid outlet of the first circulation pump is connected to the water inlet pipe of the first reverse osmosis membrane unit. The concentrate outlet of the first reverse osmosis membrane unit is connected with the liquid inlet of the second circulation pump, and the liquid inlet of the second circulation pump is also connected with the concentrate outlet of the second reverse osmosis membrane unit; the liquid outlet of the second circulation pump is connected with the liquid inlet of the second reverse osmosis membrane unit, the concentrate outlet of the second reverse osmosis membrane unit is connected with the cleaning liquid inlet pipeline of the cleaning tank through the concentrate electric regulating valve, and the concentrate outlet of the second reverse osmosis membrane unit is connected with the concentrate discharge valve through the concentrate electric regulating valve; the water production outlet of the first reverse osmosis membrane unit and the water production outlet of the second reverse osmosis membrane unit are both connected with the water production tank through the water production pipeline, and the water production pipeline is provided with a water production discharge valve, and the liquid outlet of the water production tank is connected with the outside through a drainage pump.

2. The reverse osmosis membrane system with automatic cleaning function according to claim 1, It is characterized in that The cleaning assembly includes: an acidic chemical cleaning agent storage tank, an alkaline chemical cleaning agent storage tank, an acid dosing pump, an alkaline dosing pump, a cleaning tank, a cleaning pump, a cleaning valve, a water supply valve, a cleaning drain valve, a cleaning water production valve, and a cleaning concentrated water valve; the acidic chemical cleaning agent storage tank is connected to the cleaning tank through the acid dosing pump; the alkaline chemical cleaning agent storage tank is connected to the cleaning tank through the alkaline dosing pump; the cleaning tank is connected to an external tap water pipeline through the water supply valve, the liquid outlet of the cleaning tank is connected to the liquid inlet pipeline of the cleaning pump, and the cleaning pump is respectively connected to the cleaning The first end of the cleaning valve is connected, and the second end of the cleaning valve is connected to the liquid inlet pipeline of the first-stage reverse osmosis membrane unit; the first end of the cleaning water production valve is connected to the cleaning liquid inlet of the cleaning tank, and the second end is connected to the water production outlet pipeline of each reverse osmosis membrane unit; one end of the cleaning concentrated water valve is connected to the cleaning liquid inlet of the cleaning tank, and the other end is connected to the concentrated water outlet pipeline of the final reverse osmosis membrane unit; the signal ends of the acid dosing pump, alkaline dosing pump, cleaning pump, water replenishment valve, cleaning drain valve, cleaning valve, cleaning water production valve and cleaning concentrated water valve are all connected to the signal end of the control component.

3. The reverse osmosis membrane system with automatic cleaning function according to claim 2, It is characterized in that The cleaning tank is also provided with a cleaning liquid level meter, a cleaning stirrer, a cleaning pH meter and a cleaning thermometer. The signal ends of the cleaning liquid level meter, the cleaning stirrer, the cleaning pH meter and the cleaning thermometer are all connected to the signal end of the control component. The cleaning liquid level meter is used to measure the liquid level height of the cleaning tank and send the measured liquid level height to the control component; the cleaning thermometer is used to measure the temperature of the cleaning tank and send the measured temperature to the control component.

4. The reverse osmosis membrane system with automatic cleaning function according to claim 3, It is characterized in that The control component includes a water cleaning mode and a chemical cleaning mode, and the chemical cleaning mode includes: an acid cleaning mode and an alkaline cleaning mode; When in water cleaning mode, the control assembly is used to: The liquid level height of the cleaning tank is monitored in real time by the cleaning liquid level gauge in the cleaning tank, and the liquid level height is compared with the preset starting liquid level height. When the liquid level height of the cleaning tank reaches the set starting liquid level height, the cleaning valve, the produced water cleaning valve, the concentrated liquid cleaning valve, and the concentrated water electric regulating valve are opened in sequence to 100%, and the valve action interval is N seconds; after confirming that the cleaning valve, the produced water cleaning valve, the concentrated liquid cleaning valve, and the concentrated water electric regulating valve are fully opened, the cleaning pump is delayed to start, the high-pressure pump is delayed to start, and the first circulation pump and the second circulation pump are delayed to start, and the system enters the water cleaning mode; In the water cleaning mode, the running time of the water cleaning mode is counted in real time, and the real-time pH value in the cleaning tank is monitored; the running time of the water cleaning mode is compared with a preset water cleaning time threshold, and the monitored real-time pH value is compared with a preset water cleaning pH threshold; When the running time of the water cleaning mode reaches the water cleaning time threshold or the real-time pH value reaches the preset water cleaning pH threshold, the first circulation pump and the second circulation pump are sequentially closed with delay, the high-pressure pump is closed with delay, and the cleaning pump is closed with delay. After confirming that each pump is closed, the cleaning valve, the produced water cleaning valve, and the concentrated liquid cleaning valve are closed with delay, and the produced water discharge valve, the concentrated liquid discharge valve, and the cleaning drain valve are opened. After confirming that each device is closed or opened in place, the system is delayed to enter the standby state; When in acid cleaning mode, the control assembly is used to: Turn on the acid cleaning agent dosing pump, and monitor the real-time pH value of the liquid in the cleaning tank in real time through the cleaning pH meter in the cleaning tank. When the real-time pH value in the cleaning tank is ≤ the lower limit of the acid threshold, the acid cleaning agent dosing pump is automatically turned off. When the real-time pH value is ≥ the upper limit of the acid threshold, the acid cleaning agent dosing pump is automatically turned on. The acid cleaning agent dosing pump is interlocked with the cleaning pH meter to control the pH value in the cleaning tank during the acid chemical cleaning process; Open the cleaning valve, the produced water cleaning valve, the concentrated liquid cleaning valve, and the concentrated water electric regulating valve in sequence, and open them 100%, with a valve action interval of N seconds; after confirming that each valve is fully opened, delay the start of the cleaning pump, delay the start of the high-pressure pump, and delay the start of the first circulation pump and the second circulation pump; the system automatically enters the acid cleaning mode, and in the acid cleaning mode, the running time of the acid cleaning mode is counted in real time, and the running time of the acid cleaning mode is compared with the preset acid cleaning time threshold; When the running time of the acid cleaning mode reaches the acid cleaning time threshold, the first circulation pump and the second circulation pump are shut down in sequence, the high-pressure pump is shut down in sequence, and the cleaning pump is shut down in sequence. After confirming that all pumps are shut down, the cleaning valve, the produced water cleaning valve, and the concentrated liquid cleaning valve are shut down in sequence, and the produced water discharge valve, the concentrated liquid discharge valve, and the cleaning drain valve are opened. After confirming that all equipment is shut down or opened in place, the system is switched to the water cleaning mode in sequence. When in alkaline cleaning mode, the controls are used to: Turn on the alkaline cleaning agent dosing pump, and monitor the real-time pH value of the liquid in the cleaning tank in real time through the cleaning pH meter in the cleaning tank. When the real-time pH value in the cleaning tank is ≥ the upper limit of the alkaline pH threshold, the acid cleaning agent dosing pump is automatically turned off. When the pH value in the cleaning tank is ≤ the lower limit of the alkaline pH threshold, the alkaline cleaning agent dosing pump is turned on. The alkaline cleaning agent dosing pump is interlocked with the cleaning pH meter to control the pH value in the cleaning tank during the alkaline cleaning process; Open the cleaning valve, produced water cleaning valve, concentrated liquid cleaning valve, and concentrated water electric regulating valve in sequence, and open them 100% at an interval of N seconds. After confirming that all valves are fully opened, delay starting the cleaning pump, delay starting the high-pressure pump, and delay starting the first circulation pump and the second circulation pump; The system automatically enters an alkaline cleaning mode. In the alkaline cleaning mode, the running time of the alkaline cleaning mode is timed in real time, and the running time of the alkaline cleaning mode is compared with a preset alkaline cleaning time threshold; When the running time of the alkaline cleaning mode reaches the alkaline cleaning time threshold, the alkaline chemical cleaning mode shutdown procedure is triggered, and the first circulation pump and the second circulation pump are delayed to be closed in sequence, the high-pressure pump is delayed to be closed, and the cleaning pump is delayed to be closed. After confirming that all pumps are shut down, the cleaning valve, the produced water cleaning valve, and the concentrated liquid cleaning valve are delayed to be closed, and the produced water discharge valve, the concentrated liquid discharge valve, and the cleaning drain valve are opened; after confirming that all equipment is closed or opened in place, the system is delayed to be switched to water cleaning mode.

5. The reverse osmosis membrane system with automatic cleaning function according to claim 4, It is characterized in that The acquisition component includes: a first membrane inlet pressure sensor, a second membrane inlet pressure sensor, a first membrane outlet pressure sensor, a second membrane outlet pressure sensor, and a reverse osmosis water production flow meter; The first membrane inlet pressure sensor is arranged on the liquid inlet pipe of the first reverse osmosis membrane unit, and is used to monitor the membrane inlet pressure value of the first reverse osmosis membrane unit, and send the membrane inlet pressure value of the first reverse osmosis membrane unit to the control component; the first membrane outlet pressure sensor is arranged on the water production pipe of the first reverse osmosis membrane unit, and is used to monitor the membrane outlet pressure value of the first reverse osmosis membrane unit, and send the membrane outlet pressure value of the first reverse osmosis membrane unit to the control component; the control component is used to calculate the first front-to-back pressure difference of the first reverse osmosis membrane unit according to the membrane inlet pressure value and the membrane outlet pressure value of the first reverse osmosis membrane unit, and compare the first front-to-back pressure difference with a preset pressure difference threshold value, when the first front-to-back pressure difference is greater than the preset pressure difference threshold value for a duration greater than the preset pressure difference time threshold value, when the system is shut down, a dialog box pops up to prompt manual judgment to select the acid cleaning mode or the alkaline cleaning mode, and execute the cleaning mode selected by the user; The second membrane inlet pressure sensor is arranged on the liquid inlet pipe of the first reverse osmosis membrane unit, and is used to monitor the membrane inlet pressure value of the second reverse osmosis membrane unit, and send the membrane inlet pressure value of the second reverse osmosis membrane unit to the control component; the second membrane outlet pressure sensor is arranged on the water production pipe of the second reverse osmosis membrane unit, and is used to monitor the membrane outlet pressure value of the second reverse osmosis membrane unit, and send the membrane outlet pressure value of the second reverse osmosis membrane unit to the control component; the control component is used to calculate the first front-to-back pressure difference of the second reverse osmosis membrane unit according to the membrane inlet pressure value and the membrane outlet pressure value of the second reverse osmosis membrane unit, and compare the first front-to-back pressure difference with a preset pressure difference threshold value, when the second front-to-back pressure difference is greater than the preset pressure difference threshold value for a duration greater than the preset pressure difference time threshold value, when the system is shut down, a dialog box pops up to prompt manual judgment to select the acid cleaning mode or the alkaline cleaning mode, and execute the cleaning mode selected by the user; The reverse osmosis water production flowmeter is arranged on the water production pipeline, and is used for monitoring the water production flow value, and sending the monitored water production flow value to the control component, and the control component is used for comparing the water production flow value with a preset water production threshold value. When the duration of the water production flow value being less than the preset water production threshold value is greater than the preset water production time threshold value, when the system is shut down, a dialog box pops up to prompt manual judgment to select the acid cleaning mode or the alkaline cleaning mode, and executes the cleaning mode selected by the user.

6. The reverse osmosis membrane system with automatic cleaning function according to claim 4, It is characterized in that A water inlet tank level gauge is provided in the water production tank; a water production tank level gauge is provided in the water production tank; a pre-filtration pressure sensor is installed on the water inlet pipe of the security filter, and a post-filtration pressure sensor is installed on the water outlet pipe; an inlet pH meter, an inlet ORP meter and an inlet conductivity meter are installed on the water inlet pipe of the high-pressure pump; a first outlet water rotor flowmeter is installed on the water production pipe of the first reverse osmosis membrane unit; a second outlet water rotor flowmeter is installed on the water production pipe of the second reverse osmosis membrane unit; a water production flowmeter and a water production pressure sensor are provided on the water production pipeline; the water inlet tank level gauge, the water production tank level gauge, the pre-filtration pressure sensor, the post-filtration pressure sensor, the inlet pH meter, the inlet ORP meter, the inlet conductivity meter, the first outlet water rotor flowmeter, the second outlet water rotor flowmeter, the water production flowmeter and the water production pressure sensor all establish communication with the control component.

7. The reverse osmosis membrane system with automatic cleaning function according to claim 6, It is characterized in that Also includes: The scale inhibitor component includes: a scale inhibitor storage tank, a scale inhibitor dosing pump and a scale inhibitor storage tank level gauge. The liquid outlet of the scale inhibitor storage tank is connected to the liquid inlet of the high-pressure pump through the scale inhibitor dosing pump. The scale inhibitor storage tank level gauge is installed in the scale inhibitor storage tank and establishes communication with the control component to measure the liquid level height value of the scale inhibitor storage tank and send the liquid level height value of the scale inhibitor storage tank to the control component.

8. The reverse osmosis membrane system with automatic cleaning function according to claim 7, It is characterized in that It also includes an acid storage component, which includes: an acid storage tank, an acid storage tank level gauge and an acid dosing pump; the liquid outlet of the acid storage tank is connected to the liquid inlet of the high-pressure pump through the acid dosing pump, and the acid storage tank level gauge is installed in the acid storage tank and establishes communication with the control component to measure the liquid level height value of the acid storage tank and send the liquid level height value of the acid storage tank to the control component.

9. The reverse osmosis membrane system with automatic cleaning function according to claim 7, It is characterized in that When in automatic operation mode, the control assembly is used to: The liquid level of the water inlet tank is monitored in real time by a water inlet tank level gauge, and the liquid level of the water inlet tank is compared with a preset start-up height threshold. When the liquid level of the water inlet tank reaches the start-up height threshold, the water inlet valve, the produced water discharge valve, the concentrate discharge valve, and the concentrated water electric regulating valve are opened in sequence to 100%; After confirming that all valves are fully opened, delay starting the water inlet pump, antiscalant dosing pump, high-pressure pump, first circulation pump and second circulation pump; delay adjusting the opening degree of the concentrated water electric regulating valve to the set pressure or flow range; The liquid level of the water production tank is monitored in real time by a water production tank level gauge, and the liquid level of the water production tank is compared with a preset drainage height threshold. When the liquid level of the water production tank reaches the preset drainage height threshold, the drainage pump is turned on to drain the water in the water production tank; the system enters automatic operation mode; In the automatic operation mode, the control assembly is also used to: The pH value of the liquid pumped by the high-pressure pump is monitored in real time by a water inlet pH meter, and the pH value of the pumped liquid is compared with a preset pH range. When the pH value of the pumped liquid is higher than the upper limit of the pH range, the acid dosing pump is turned on for pH adjustment. When the pH value of the pumped liquid is lower than the lower limit of the pH range, the system automatically turns off the acid dosing pump. The liquid level of the acid storage tank is monitored in real time by an acid storage tank level gauge, and the liquid level of the acid storage tank is compared with a preset acid storage level threshold. When the liquid level of the acid storage tank is lower than the acid storage level threshold, an alarm signal is issued to prompt manual dosing. When the liquid level of the acid storage tank is lower than the acid storage level threshold for a duration greater than or equal to the preset duration, the system automatically enters a shutdown procedure. Before the low liquid level alarm of the acid storage tank is eliminated, the system cannot enter an automatic operation mode. The liquid level of the antiscalant tank is monitored in real time by the antiscalant tank level gauge. When the liquid level of the antiscalant tank is lower than the preset antiscalant liquid level, an alarm signal is sent to prompt manual dosing. When the liquid level of the antiscalant tank is lower than the preset antiscalant liquid level for a duration greater than or equal to the preset duration, the system automatically enters the shutdown procedure. Before the low liquid level alarm of the antiscalant tank is eliminated, the system cannot enter the automatic operation mode. Calculate the pressure difference before and after filtration of the pre-filtration pressure sensor and the post-filtration pressure sensor, and compare the pre-filtration pressure difference with the preset filtration pressure difference threshold. When the pre-filtration pressure difference is ≥ the filtration pressure difference threshold, issue an alarm signal to prompt manual replacement of the filter element. When the pre-filtration pressure difference is lower than the filtration pressure difference threshold for a duration ≥ the preset water production time, the system automatically enters the shutdown procedure. Before the pre-filtration pressure difference alarm is eliminated, the system cannot enter the automatic operation state. The inlet water ORP value is detected in real time by an inlet water ORP meter, and the inlet water ORP value is compared with a preset ORP threshold value. When the inlet water ORP value is higher than the ORP threshold value, an alarm signal is issued to prompt manual adjustment; The pressure of the water production side is detected in real time by the water production pressure sensor, and the pressure of the water production side is compared with the preset water production pressure threshold. When the pressure of the water production side is higher than the preset water production pressure threshold, the system enters the shutdown procedure. Before the water production pressure alarm is eliminated, the system cannot enter the automatic operation state; The produced water conductivity on the produced water side is detected in real time by a produced water conductivity instrument, and the produced water conductivity is compared with a preset produced water conductivity threshold. When the reverse osmosis produced water conductivity meter shows that the produced water conductivity is higher than the set produced water conductivity value for a duration ≥ the preset water production time, the system automatically enters the shutdown procedure. Before the produced water conductivity alarm is eliminated, the system cannot enter the automatic operation state; The liquid level of the water inlet tank is monitored in real time by a water inlet tank level gauge, and the liquid level of the water inlet tank is compared with a preset shutdown height threshold. When the liquid level of the water inlet tank is lower than the shutdown height threshold, the system enters a shutdown procedure; When entering the shutdown procedure, the control component is used to: Open the concentrated water electric regulating valve 100%, concentrated water discharge valve and produced water discharge valve in sequence; After confirming that all valves are fully opened, delay closing the first circulation pump and the second circulation pump; delay closing the high-pressure pump, delay closing the water inlet pump and the antiscalant dosing pump; after confirming that all pumps are closed, delay closing the water inlet valve; after confirming that all equipment is fully closed, delay switching the system to standby mode.

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