Reverse osmosis online cleaning device

Abstract

The utility model belongs to the technical field of water treatment, and particularly relates to a reverse osmosis online cleaning device. Comprising a reverse osmosis filtering system and a reverse osmosis cleaning system, and the reverse osmosis filtering system comprises a reverse osmosis water supply pump, a pipeline mixer, a first security filter, a reverse osmosis high-pressure pump, a first-section reverse osmosis membrane and a second-section reverse osmosis membrane which are connected in sequence; the reverse osmosis cleaning system comprises a cleaning water tank, a chemical cleaning water pump and a second security filter which are connected in sequence; by means of scientific and reasonable design and optimization, effective cleaning of the reverse osmosis membrane body can be achieved, auxiliary pipelines, equipment and the like can be comprehensively cleaned, thoroughness of reverse osmosis cleaning is guaranteed, cleaning efficiency is improved, and then clean and stable operation of the whole system is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of water treatment, and in particular relates to a reverse osmosis online cleaning device. Background Art

[0002] With the rapid development of modern chemical industry, the application of raw water treatment and reclaimed water reuse systems is becoming more and more extensive. In these systems, reverse osmosis technology has been widely used due to its high efficiency and energy saving. However, reverse osmosis technology also faces some challenges in practical application.

[0003] Due to the special properties of the reverse osmosis membrane, it can only operate in the forward flow direction and cannot be backwashed. This leads to problems such as microbial growth, scaling, and impurity deposition in the membrane system during long-term operation. These problems not only affect the performance and life of the reverse osmosis membrane, but may also lead to a decrease in the quality of the system's effluent and even cause irreversible damage to the entire system.

[0004] In addition, in conventional designs, cleaning devices are usually only installed on reverse osmosis skid-mounted equipment, while its related auxiliary pipelines and equipment are often ignored. This design defect causes secondary fouling in the system within a short period of time after the reverse osmosis body is cleaned and the membrane is replaced. This not only affects the long-term stable operation of the system, but also increases the frequency of chemical cleaning and replacement of the membrane, further increasing the operating cost and maintenance difficulty. Utility Model Content

[0005] In view of the above deficiencies in the prior art, the purpose of the utility model is to provide a reverse osmosis online cleaning device, which, through scientific and reasonable design and optimization, can not only achieve effective cleaning of the reverse osmosis membrane body, but also comprehensively clean the auxiliary pipelines, equipment, etc., thereby ensuring the thoroughness of reverse osmosis cleaning, improving the cleaning efficiency, and thus ensuring the cleanliness and stable operation of the entire system.

[0006] The utility model is realized by adopting the following technical solutions:

[0007] The reverse osmosis online cleaning device comprises a reverse osmosis filtration system and a reverse osmosis cleaning system, wherein the reverse osmosis filtration system comprises a reverse osmosis water supply pump, a pipeline mixer, a first safety filter, a reverse osmosis high-pressure pump, a first reverse osmosis membrane and a second reverse osmosis membrane connected in sequence, a No. 1 valve is arranged between the reverse osmosis high-pressure pump and the first reverse osmosis membrane, and a No. 2 valve is arranged between the first reverse osmosis membrane and the second reverse osmosis membrane; the reverse osmosis cleaning system comprises a cleaning water tank, a chemical cleaning water pump and a second safety filter connected in sequence; the outlet of the chemical cleaning water pump is divided into two routes, one route is connected to the cleaning water tank through a self-circulating pipeline, a No. 3 valve is arranged on the self-circulating pipeline, and the other route is connected to the second safety filter through a pipeline, and a No. 4 valve is arranged on the pipeline; the outlet of the second safety filter is divided into three routes, the first route is connected to the inlet of the pipeline mixer through a pipeline, and the second route is connected to the No. 1 valve and a first reverse osmosis membrane through a pipeline. The first route is connected to the pipeline of the first reverse osmosis membrane, the third route is connected to the pipeline between the No. 2 valve and the second reverse osmosis membrane through a pipeline; the concentrated water outlet of the first reverse osmosis membrane is connected to the inlet of the second reverse osmosis membrane through a pipeline, the fresh water outlet of the first reverse osmosis membrane is divided into two routes, one is the fresh water pipeline, the fresh water pipeline is provided with a No. 5 valve, and the other is connected to the cleaning water tank through a first cleaning water loop, and the first cleaning water loop is provided with a No. 6 valve; the fresh water outlet of the second reverse osmosis membrane is connected to the fresh water pipeline through a pipeline, the concentrated water outlet of the second reverse osmosis membrane is divided into two routes, one is the concentrated water pipeline, the concentrated water pipeline is provided with a No. 7 valve, and the other is connected to the cleaning water tank through the second cleaning water loop, and the second cleaning water loop is provided with a No. 8 valve; the pipeline between the reverse osmosis high-pressure pump and the No. 1 valve is also connected to the auxiliary equipment cleaning water loop, the outlet of the auxiliary equipment cleaning water loop is connected to the cleaning water tank through a pipeline, and the auxiliary equipment cleaning water loop is provided with a No. 9 valve.

[0008] The cleaning water tank is respectively connected with a water supply pipeline, an acid solution pipeline and an alkali solution pipeline, which are used to supply clean water, acid solution and alkali solution to the cleaning water tank respectively.

[0009] A defoaming spray device is arranged inside the cleaning water tank to prevent excessive foam from being generated in the cleaning water tank, and the inlet of the defoaming spray device is connected to the water supply pipeline.

[0010] The cleaning water tank is also equipped with a temperature monitoring device, a pH monitoring device, a liquid level monitoring device and an electric heater.

[0011] A pressure monitoring device is provided on the outlet pipeline of the chemical cleaning water pump.

[0012] It also includes a control system, which is electrically connected to valve No. 1, valve No. 2, valve No. 3, valve No. 4, valve No. 5, valve No. 6, valve No. 7, valve No. 8, valve No. 9, temperature monitoring device, pH monitoring device, liquid level monitoring device, electric heater, pressure monitoring device and chemical cleaning water pump, so as to realize centralized control of all valves, monitoring devices and chemical cleaning water pumps and ensure the automation and intelligence of the entire cleaning process.

[0013] The device described works as follows during cleaning:

[0014] 1) Pre-treatment cleaning: First, turn off the reverse osmosis water supply pump, valve No. 5 and valve No. 7, inject an appropriate amount of clean water into the cleaning water tank through the water supply pipeline, start the chemical cleaning water pump, and draw clean water from the cleaning water tank. After filtering through the second security filter, it flows to different parts of the reverse osmosis filtration system through three pipelines. Pre-treatment cleaning is performed on the pipeline mixer, security filter, reverse osmosis high-pressure pump, first-stage reverse osmosis membrane, second-stage reverse osmosis membrane and auxiliary pipelines to remove most of the loose pollutants on the surface. The cleaning water passes through the auxiliary equipment cleaning water circuit, The first-stage cleaning water loop and the second-stage cleaning water loop return to the cleaning water tank to form a closed loop for cyclic cleaning; the cleaning water temperature is monitored in real time through the temperature monitoring device, and the electric heater is adjusted through the control system to maintain the water temperature at 30-35°C; the liquid level of the cleaning water tank is monitored in real time through the liquid level monitoring device, and water is replenished through the cleaning pipeline in time when the liquid level is too low; the outlet of the chemical cleaning water pump and the pipeline pressure are monitored in real time through the pressure monitoring device, and the valve opening of the chemical water pump and the No. 3 valve on the self-circulating pipeline is adjusted through the control system to control the pipeline pressure within a safe range;

[0015] 2) Alkali washing: After pretreatment and washing, close valve No. 4, keep valve No. 3 open, add an appropriate amount of alkaline cleaning agent to the washing water tank through the alkali liquid pipeline to form alkali liquid, and drive the alkali liquid through the self-circulation pipeline for self-circulation under the action of the chemical washing water pump, and start the defoaming spray device in the washing water tank to eliminate the foam generated during the preparation process to ensure the quality of the alkali liquid; monitor the pH value of the washing water through the pH monitoring device to stabilize between 10-11, open valve No. 4, repeat the pretreatment and washing steps, and use alkali liquid to circulate the system to remove organic matter and biological sediments;

[0016] 3) Rinse: After alkaline cleaning, repeat the pretreatment cleaning steps and use clean water to thoroughly rinse the system to neutrality to remove residual alkaline cleaning agent;

[0017] 4) Pickling: Then close valve No. 4, keep valve No. 3 open, add an appropriate amount of acidic cleaning agent to the cleaning water tank through the acid pipeline to form acid solution, repeat the preparation steps of alkali solution, adjust the pH value of the acid solution to between 2-3, and then repeat the alkali washing steps, use acid solution to circulate and flush the system to dissolve and remove inorganic salt scale and metal oxides;

[0018] 5) Final flushing: After pickling, use clean water to thoroughly flush the system again until it is neutral. When the discharged water meets the cleanliness standard, the entire cleaning process is completed, the water in the system is drained, and all valves and pumps are closed.

[0019] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0020] (1) The reverse osmosis online cleaning device described in the utility model effectively ensures the thoroughness of reverse osmosis cleaning by improving the reverse osmosis cleaning system, so that when cleaning the reverse osmosis membrane, the relevant auxiliary pipelines can be chemically cleaned synchronously, avoiding the problem of only cleaning the reverse osmosis membrane and ignoring the auxiliary pipelines in the traditional cleaning method, thereby effectively preventing the impurities remaining in the pipeline from causing the reverse osmosis membrane to be blocked again after the cleaning is completed, which not only improves the cleaning effect of the reverse osmosis system, but also prolongs the service life of the reverse osmosis membrane and reduces the maintenance cost of the system;

[0021] (2) The reverse osmosis online cleaning device described in the utility model improves the efficiency of reverse osmosis cleaning. The device is equipped with a complete control system, which can be electrically connected to various valves, monitoring devices, chemical cleaning water pumps and other components to achieve automatic monitoring and adjustment. During the cleaning process, the control system can monitor the key parameters of the cleaning water such as temperature, pH value, liquid level and pipeline pressure in real time, and automatically adjust the operating status of the electric heater, valves, water pumps and other equipment according to the preset program to ensure that the cleaning process is carried out in a safe and efficient state. It not only improves the cleaning efficiency, but also reduces the difficulty and error of manual operation, making the entire cleaning process simpler and more reliable;

[0022] (3) The reverse osmosis online cleaning device described in the utility model also has the advantages of energy saving and environmental protection. By improving and optimizing the reverse osmosis online cleaning device, it can achieve accurate cleaning and efficient maintenance of the system, avoiding unnecessary waste of energy and use of chemical agents, and meeting the current needs of energy conservation and emission reduction; at the same time, the device is also equipped with equipment such as a defoaming spray device and a liquid level monitoring device, which can effectively eliminate the foam generated during the cleaning process and monitor the liquid level of the cleaning water tank in real time, thereby ensuring the stability and safety of the cleaning process. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the reverse osmosis online cleaning device described in the utility model;

[0024] In the figure: 1. Reverse osmosis water supply pump; 2. Pipeline mixer; 3. First safety filter; 4. Reverse osmosis high-pressure pump; 5. First stage reverse osmosis membrane; 6. Second stage reverse osmosis membrane; 7. No. 1 valve; 8. No. 2 valve; 9. Cleaning water tank; 10. Chemical cleaning water pump; 11. Second safety filter; 12. Self-circulating pipeline; 13. No. 3 valve; 14. No. 4 valve; 15. Fresh water pipeline; 16. No. 5 valve; 17. First stage cleaning water circuit; 18. No. 6 valve; 19. Concentrated water pipeline; 20. No. 7 valve; 21. Second stage cleaning water circuit; 22. No. 8 valve; 23. Make-up water pipeline; 24. Acid pipeline; 25. Alkali pipeline; 26. Defoaming spray device; 27. Temperature monitoring device; 28. pH monitoring device; 29. ​​Liquid level monitoring device; 30. Electric heater; 31. Pressure monitoring device; 32. Auxiliary equipment cleaning water circuit; 33. No. 9 valve. DETAILED DESCRIPTION

[0025] In order to make the purpose and technical solution of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings.

[0026] Example 1

[0027] like Figure 1As shown, the reverse osmosis online cleaning device comprises a reverse osmosis filtration system and a reverse osmosis cleaning system, wherein the reverse osmosis filtration system comprises a reverse osmosis water supply pump 1, a pipeline mixer 2, a first security filter 3, a reverse osmosis high-pressure pump 4, a first reverse osmosis membrane 5 and a second reverse osmosis membrane 6 connected in sequence, a No. 1 valve 7 is arranged between the reverse osmosis high-pressure pump 4 and the first reverse osmosis membrane 5, and a No. 2 valve 8 is arranged between the first reverse osmosis membrane 5 and the second reverse osmosis membrane 6; the reverse osmosis cleaning system comprises a cleaning water tank 9, a chemical cleaning water pump 10 and a second security filter 11 connected in sequence; the outlet of the chemical cleaning water pump 10 is divided into two routes, one route is connected to the cleaning water tank 9 through a self-circulating pipeline 12, a No. 3 valve 13 is arranged on the self-circulating pipeline 12, and the other route is connected to the second security filter 11 through a pipeline, and a No. 4 valve 14 is arranged on the pipeline; the outlet of the second security filter 11 is divided into three routes, the first route is connected to the inlet of the pipeline mixer 2 through a pipeline, and the second route is connected to the pipeline between the No. 1 valve 7 and the first reverse osmosis membrane 5 through a pipeline The third route is connected to the pipeline between the No. 2 valve 8 and the second-stage reverse osmosis membrane 6 through a pipeline; the concentrated water outlet of the first-stage reverse osmosis membrane 5 is connected to the inlet of the second-stage reverse osmosis membrane 6 through a pipeline, and the fresh water outlet of the first-stage reverse osmosis membrane 5 is divided into two routes, one of which is a fresh water pipeline 15, on which a No. 5 valve 16 is provided, and the other route is connected to the cleaning water tank 9 through a cleaning water circuit 17, on which a No. 6 valve 18 is provided; the fresh water outlet of the second-stage reverse osmosis membrane 6 is connected to the fresh water pipeline 15 through a pipeline. The concentrated water outlet of the second-stage reverse osmosis membrane 6 is divided into two routes, one route is a concentrated water pipeline 19, on which a No. 7 valve 20 is provided, and the other route is connected to the cleaning water tank 9 through a second-stage cleaning water loop 21, on which a No. 8 valve 22 is provided; the pipeline between the reverse osmosis high-pressure pump 4 and the No. 1 valve 7 is also connected to an auxiliary equipment cleaning water loop 32, and the outlet of the auxiliary equipment cleaning water loop 32 is connected to the cleaning water tank 9 through a pipeline, and a No. 9 valve 33 is provided on the auxiliary equipment cleaning water loop 32.

[0028] The cleaning water tank 9 is respectively connected with a water supply pipeline 23, an acid solution pipeline 24 and an alkali solution pipeline 25.

[0029] A defoaming spray device 26 is provided inside the cleaning water tank 9 , and an inlet of the defoaming spray device 26 is connected to the water supply pipeline 23 .

[0030] The cleaning water tank 9 is also equipped with a temperature monitoring device 27 , a pH monitoring device 28 , a liquid level monitoring device 29 and an electric heater 30 .

[0031] A pressure monitoring device 31 is provided on the outlet pipeline of the chemical cleaning water pump 10 .

[0032] It also includes a control system, which is electrically connected to valve No. 1 7, valve No. 2 8, valve No. 3 13, valve No. 4 14, valve No. 5 16, valve No. 6 18, valve No. 7 20, valve No. 8 22, valve No. 9 33, temperature monitoring device 27, pH monitoring device 28, liquid level monitoring device 29, electric heater 30, pressure monitoring device 31 and chemical cleaning water pump 10.

[0033] When working, the specific steps are as follows:

[0034] (1) Pretreatment cleaning:

[0035] Close the reverse osmosis water supply pump 1, valve No. 5 16 and valve No. 7 20 to cut off the normal operation of the reverse osmosis filtration system. Inject an appropriate amount of clean water into the cleaning water tank 9 through the water supply pipeline 23, and start the chemical cleaning water pump 10. After the clean water is filtered by the second security filter 11, it is divided into three paths and flows to different parts of the reverse osmosis system, including the pipeline mixer 2, the first security filter 3, the reverse osmosis high-pressure pump 4, the first stage reverse osmosis membrane 5, the second stage reverse osmosis membrane 6 and the auxiliary pipelines, etc., for pre-treatment and cleaning. The cleaning water returns to the cleaning water tank 9 through the auxiliary equipment cleaning water circuit 32, the first stage cleaning water circuit 17 and the second stage cleaning water circuit 21 to form a closed loop for cyclic cleaning. The cleaning water temperature is monitored in real time by the temperature monitoring device 27, and the electric heater 30 is adjusted by the control system to keep the water temperature at 33±2℃. The liquid level of the cleaning water tank 9 is monitored in real time by the liquid level monitoring device 29. The pipeline pressure is monitored in real time by the pressure monitoring device 31, and the opening of the chemical cleaning water pump 10 and the No. 3 valve 13 on the self-circulating pipeline 12 is adjusted by the control system to control the pipeline pressure.

[0036] (2) Alkaline washing:

[0037] After pretreatment and cleaning, close valve No. 4 14 and keep valve No. 3 open. Add alkaline cleaning agent to the cleaning water tank 9 through the alkaline solution pipeline 25 to form alkaline solution, start the chemical cleaning water pump 10, and drive the alkaline solution to self-circulate through the self-circulation pipeline 12. At the same time, start the defoaming spray device 26 in the cleaning water tank 9 to eliminate the foam generated during the preparation process. Monitor the pH value of the alkaline solution through the pH monitoring device 28 and stabilize it between 10.5±0.5. Open valve No. 4 14, repeat the pretreatment and cleaning steps, and use alkaline solution to circulate and flush the system.

[0038] (3) Rinse:

[0039] After alkaline cleaning, repeat the pretreatment cleaning steps and thoroughly flush the system with clean water until it is neutral.

[0040] (4) Pickling:

[0041] Then close valve No. 4 14 and keep valve No. 3 13 open. Add an appropriate amount of acidic cleaning agent to the cleaning water tank 9 through the acid pipeline 24 to form acid solution, and repeat the preparation steps of alkaline solution. Adjust the pH value of the acid solution to between 2.5±0.5. Repeat the alkaline washing steps and use acid solution to circulate and flush the system.

[0042] (5) Final rinse:

[0043] After pickling, use clean water to thoroughly flush the system again until it is neutral. Make sure that the entire cleaning process is complete when the discharged water reaches the cleanliness standard. Drain the water in the system and close all valves and pumps.

[0044] During the entire cleaning process, the control system will monitor and adjust the temperature, pH value, liquid level and pipeline pressure of the cleaning water tank 9 in real time to ensure that the cleaning process is scientific, reasonable, safe and efficient. After the cleaning is completed, the reverse osmosis filtration system returns to normal operation.

Claims

1. A reverse osmosis online cleaning device, characterized in that: The invention comprises a reverse osmosis filtration system and a reverse osmosis cleaning system, wherein the reverse osmosis filtration system comprises a reverse osmosis water supply pump (1), a pipeline mixer (2), a first security filter (3), a reverse osmosis high-pressure pump (4), a first reverse osmosis membrane (5) and a second reverse osmosis membrane (6) which are connected in sequence, a first valve (7) is arranged between the reverse osmosis high-pressure pump (4) and the first reverse osmosis membrane (5), and a second valve (8) is arranged between the first reverse osmosis membrane (5) and the second reverse osmosis membrane (6); the reverse osmosis cleaning system comprises a cleaning water tank (9), a chemical cleaning water pump (10) and a first reverse osmosis membrane (5) which are connected in sequence The outlet of the chemical cleaning water pump (10) is divided into two paths, one of which is connected to the cleaning water tank (9) through a self-circulating pipeline (12), on which a No. 3 valve (13) is provided, and the other is connected to the second security filter (11) through a pipeline, on which a No. 4 valve (14) is provided; the outlet of the second security filter (11) is divided into three paths, the first of which is connected to the inlet of the pipeline mixer (2) through a pipeline, the second of which is connected to the pipeline between the No. 1 valve (7) and a section of the reverse osmosis membrane (5) through a pipeline, and the third of which is connected to the second security filter (11) through a pipeline. The pipeline between the No. 5 valve (8) and the second-stage reverse osmosis membrane (6) is connected; the concentrated water outlet of the first-stage reverse osmosis membrane (5) is connected to the inlet of the second-stage reverse osmosis membrane (6) through a pipeline; the fresh water outlet of the first-stage reverse osmosis membrane (5) is divided into two routes, one of which is a fresh water pipeline (15) on which a No. 5 valve (16) is provided, and the other route is connected to the cleaning water tank (9) through a cleaning water circuit (17) on which a No. 6 valve (18) is provided; the fresh water outlet of the second-stage reverse osmosis membrane (6) is connected to the fresh water pipeline (15) through a pipeline, and the second-stage reverse osmosis membrane (6) is connected to the fresh water pipeline (15) through a pipeline. The concentrated water outlet of the osmotic membrane (6) is divided into two routes, one of which is a concentrated water pipeline (19) on which a No. 7 valve (20) is provided, and the other is connected to a cleaning water tank (9) through a second-stage cleaning water circuit (21) on which a No. 8 valve (22) is provided; an auxiliary equipment cleaning water circuit (32) is also connected to the pipeline between the reverse osmosis high-pressure pump (4) and the No. 1 valve (7), the outlet of the auxiliary equipment cleaning water circuit (32) is connected to the cleaning water tank (9) through a pipeline, and a No. 9 valve (33) is provided on the auxiliary equipment cleaning water circuit (32).

2. The reverse osmosis online cleaning device according to claim 1, characterized in that: The cleaning water tank (9) is respectively connected to a water supply pipeline (23), an acid solution pipeline (24) and an alkali solution pipeline (25).

3. The reverse osmosis online cleaning device according to claim 2, characterized in that: The interior of the cleaning water tank (9) is provided with a defoaming spray device (26), and the inlet of the defoaming spray device (26) is connected to the water supply pipeline (23).

4. The reverse osmosis online cleaning device according to claim 3, characterized in that: The cleaning water tank (9) is also equipped with a temperature monitoring device (27), a pH monitoring device (28), a liquid level monitoring device (29) and an electric heater (30).

5. The reverse osmosis online cleaning device according to claim 4, characterized in that: A pressure monitoring device (31) is provided on the outlet pipeline of the chemical cleaning water pump (10).

6. The reverse osmosis online cleaning device according to claim 5, characterized in that: The invention also includes a control system, which is electrically connected to valve No. 1 (7), valve No. 2 (8), valve No. 3 (13), valve No. 4 (14), valve No. 5 (16), valve No. 6 (18), valve No. 7 (20), valve No. 8 (22), valve No. 9 (33), a temperature monitoring device (27), a pH monitoring device (28), a liquid level monitoring device (29), an electric heater (30), a pressure monitoring device (31) and a chemical cleaning water pump (10).

Images