Reverse osmosis inlet water pollutant stripping system and method

Abstract

The invention relates to the technical field of water inlet treatment, in particular to a reverse osmosis water inlet pollutant stripping system and method, and the system comprises a monitoring module which is used for monitoring the flow and pressure difference of raw water; the connecting module is used for connecting a raw water source with the system and conveying raw water; the permeation module is used for separating pollutants in the raw water to generate pure water; the pressurization module is used for increasing the pressure of the raw water, so that the raw water quickly passes through the permeation module; the output module is used for discharging various types of water treated by the permeation module and flushing the permeation module; and the electric control module is used for controlling the operation of the whole reverse osmosis influent pollutant stripping procedure. The reverse osmosis membrane cleaning device has the advantages that the reverse osmosis membrane is subjected to hydraulic scrubbing through raw water, biological dirt and inorganic salt sediment on the surface of the membrane can be effectively removed, the scrubbing effect is good, the use requirement in actual operation can be met, chemical agents are not needed in hydraulic scrubbing, and the environmental risk is low.

Description

Technical Field

[0001] The invention relates to the technical field of influent treatment, and in particular to a reverse osmosis influent pollutant stripping system and method. Background Art

[0002] Reverse osmosis technology is one of the most common water treatment processes in power plants. Organic matter, calcium and magnesium ions, silicon, iron and other substances in the raw water are easy to form dirt on the surface of the filter membrane element, causing the reverse osmosis pressure difference to rise rapidly, the water production rate and desalination rate to decrease, the service life of consumables to shorten, and even cause the reverse osmosis equipment unit to fail. Under traditional conditions, alkaline agents, acidic agents, scale inhibitors, bactericides and other chemical agents are usually used to perform offline chemical cleaning of the reverse osmosis filter membrane. The chemical cleaning method has the following problems: chemical cleaning requires a large amount of chemical agents, which is costly, and agents such as sulfuric acid are hazardous chemicals, with complicated procurement procedures, high transportation and storage requirements, and certain safety risks for operators; the sewage after cleaning contains chemical agents, which faces problems such as difficult treatment and emission compliance; chemical cleaning requires the filter membrane element to be removed for offline cleaning, which is cumbersome and labor-intensive. Summary of the invention

[0003] In view of the above problems or problems existing in the prior art, the present invention is proposed.

[0004] Therefore, the object of the present invention is to provide a method for stripping contaminants from reverse osmosis influent water, which can effectively remove contaminants on the membrane surface to maintain efficient water treatment performance while avoiding the high cost, safety risks and environmental problems caused by chemical cleaning.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a reverse osmosis water inlet pollutant stripping system, which includes a monitoring module: for monitoring the flow rate and pressure difference of raw water;

[0006] Connection module: used to connect the raw water source and the system to transport raw water;

[0007] Osmosis module: used to separate pollutants from raw water and produce pure water;

[0008] Booster module: used to increase the pressure of raw water so that it can pass through the osmosis module quickly;

[0009] Output module: used to discharge various types of water treated by the osmosis module and flush the osmosis module;

[0010] Electronic control module: used to control the operation of the entire reverse osmosis water pollutant stripping program.

[0011] As a preferred solution of the reverse osmosis water inlet pollutant stripping system of the present invention, wherein: the monitoring module includes a flow meter and a pressure sensor;

[0012] The flow meter is used to monitor the flow of raw water and ensure that the system operates at an appropriate flow rate;

[0013] The pressure sensor is used to monitor the pressure difference on both sides of the permeable membrane element to determine whether cleaning is required.

[0014] As a preferred solution of the reverse osmosis water inlet pollutant stripping system of the present invention, the connection module includes a raw water inlet pipe for connecting the raw water source with the system to transport the raw water.

[0015] As a preferred solution of the reverse osmosis water inlet pollutant stripping system of the present invention, the osmosis module includes an osmotic membrane element, which is a core component for separating pollutants in raw water to produce pure water.

[0016] As a preferred solution of the reverse osmosis water inlet pollutant stripping system of the present invention, the boosting module includes a boosting pump for increasing the pressure of the raw water so as to pass through the osmotic membrane element.

[0017] As a preferred solution of the reverse osmosis water inlet pollutant stripping system of the present invention, wherein: the output module includes a pure water outlet pipe, a low-pressure solenoid valve, a concentrated water drain pipe, and a high-pressure solenoid valve;

[0018] The pure water outlet pipe and the low-pressure solenoid valve are used to transport the pure water treated by the osmotic membrane and control the outflow of the pure water;

[0019] The concentrate drain pipe and the high-pressure solenoid valve are used to discharge the concentrate after being treated by the permeable membrane and to flush the permeable membrane element during the cleaning process.

[0020] As a preferred solution of the reverse osmosis water inlet pollutant stripping method of the present invention, wherein: the electric control module includes a water inlet solenoid valve and an electric control program;

[0021] The water inlet solenoid valve is the switch that controls the raw water entering the system;

[0022] The electronic control program controls the operation of the entire reverse osmosis water contaminant stripping system, receives the signal from the pressure sensor and sends instructions to the solenoid valve.

[0023] In order to solve the above technical problems, the present invention also provides the following technical solutions: a method for stripping pollutants from reverse osmosis influent water, comprising pressurizing raw water through a pressurizing module so that the raw water effectively passes through an osmotic membrane element to obtain pure water;

[0024] The outflow of pure water is controlled by the output module to obtain purified pure water and transport it to the pure water storage system;

[0025] The entire reverse osmosis system is controlled by the electronic control module, so that the reverse osmosis system can operate automatically.

[0026] As a preferred solution of the reverse osmosis influent pollutant stripping method of the present invention, raw water is pressurized by applying additional pressure to the raw water through a booster pump to overcome the resistance of the osmotic membrane element, ensuring that the raw water can pass through the osmotic membrane at a sufficient flow rate, and the operation of the booster pump is monitored and controlled by an electronic control module to maintain a constant inlet water pressure.

[0027] As a preferred solution of the reverse osmosis water inlet pollutant stripping method of the present invention, the pure water output is used to control and guide the outflow of pure water, which includes opening the low-pressure solenoid valve under water production conditions to allow pure water to flow through the pure water outlet pipe to the pure water storage system.

[0028] Beneficial effects of the present invention: The present invention uses raw water to hydraulically scrub the reverse osmosis membrane, which can effectively remove biological fouling and inorganic salt precipitation on the membrane surface, has a good scrubbing effect, can meet the use requirements in actual operation, and does not require the use of chemical agents for hydraulic scrubbing, does not produce sewage containing acid, alkali, scale inhibitors, and oxidizing substances, and has low environmental risks. There is no need to disassemble the reverse osmosis membrane element, and unattended cleaning can be achieved, which greatly reduces labor input. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0030] Figure 1 This is a schematic diagram of the overall structure of the reverse osmosis water pollutant stripping system.

[0031] Figure 2 The present invention is a first implementation method for controlling the total amount of ammonia injection in a reverse osmosis influent pollutant stripping system. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0033] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0034] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0035] Example 1

[0036] Reference Figure 1-2 , which is the first embodiment of the present invention, provides a reverse osmosis water inlet contaminant stripping system, which can effectively remove contaminants on the membrane surface to maintain efficient water treatment performance while avoiding the high cost, safety risks and environmental problems caused by chemical cleaning.

[0037] Specifically, it is used to monitor the flow rate and pressure difference of raw water;

[0038] Connection module 200: used to connect the raw water source and the system to transport raw water;

[0039] Osmosis module 300: used to separate pollutants in raw water and produce pure water;

[0040] The booster module 400 is used to increase the pressure of the raw water so that the raw water can quickly pass through the osmosis module 300;

[0041] Output module 500: used to discharge various types of water treated by the osmosis module 300 and rinse the osmosis module 300;

[0042] The electric control module 600 is used to control the operation of the entire reverse osmosis water pollutant stripping program.

[0043] Furthermore, the monitoring module 100 includes a flow meter 101 and a pressure sensor 102;

[0044] The flow meter 101 is used to monitor the flow of raw water and ensure that the system operates at an appropriate flow rate;

[0045] The pressure sensor 102 is used to monitor the pressure difference between the two sides of the permeable membrane element 301 to determine whether cleaning is required.

[0046] Furthermore, the connection module 200 includes a raw water inlet pipe 201 for connecting a raw water source with the system to transport raw water.

[0047] Furthermore, the osmosis module 300 includes an osmotic membrane element 301 , which is a core component for separating pollutants in raw water to produce pure water.

[0048] Furthermore, the boosting module 400 includes a boosting pump 401 for increasing the pressure of raw water so as to pass through the osmotic membrane element 301 .

[0049] Further, the output module 500 includes a pure water outlet pipe 501, a low-pressure solenoid valve 502, a concentrated water drain pipe 503, and a high-pressure solenoid valve 504;

[0050] The pure water outlet pipe 501 and the low-pressure solenoid valve 502 are used to transport the pure water treated by the osmotic membrane and control the outflow of the pure water;

[0051] The concentrated water discharge pipe 503 and the high-pressure solenoid valve 504 are used to discharge concentrated water after being treated by the permeable membrane and to flush the permeable membrane element 301 during the cleaning process.

[0052] It should be noted that the low-pressure solenoid valve 502 is installed on the pure water outlet pipe 501 and is connected to the pure water side of the permeable membrane element 301 through the pure water outlet pipe 501;

[0053] The high-pressure solenoid valve 504 is installed on the concentrated water drainage pipe 503, and is connected to the concentrated water side of the permeable membrane element 301 through the concentrated water drainage pipe 503. The opening pressure of the high-pressure solenoid valve 504 is controlled at 7 to 10 times the opening pressure of the low-pressure solenoid valve 502 to ensure sufficient pressure for effective flushing.

[0054] Furthermore, the electronic control module 600 includes a water inlet solenoid valve 601 and an electronic control program 602;

[0055] The water inlet solenoid valve 601 is a switch for controlling the raw water to enter the system;

[0056] The electronic control program 602 controls the operation of the entire reverse osmosis water contaminant stripping system, receives the signal from the pressure sensor 102 and sends instructions to the solenoid valve.

[0057] It should be noted that the booster pump 401, the water inlet solenoid valve 601, and the flow meter 101 are installed on the raw water inlet pipe 201, and are connected to the concentrated water side of the osmotic membrane element 301 through the raw water inlet pipe 201;

[0058] The pressure sensor 102 is used to measure the pressure difference between the pure water side of the permeable membrane element 301 and the concentrated water side of the permeable membrane element 301;

[0059] The electronic control program 602 is connected to the pressure sensor 102 and the high-pressure solenoid valve 504 respectively through signal lines (not shown in the figure).

[0060] When in use, it is divided into water production conditions and flushing conditions, among which the water production conditions include:

[0061] The raw water first enters the system through the raw water inlet pipe 201, which is the entrance for the raw water to enter the reverse osmosis system. The raw water then enters the booster pump 401. The function of the booster pump 401 is to increase the pressure of the raw water to ensure that there is enough pressure to drive the water molecules through the osmotic membrane element 301. The pressurized raw water passes through the water inlet solenoid valve 601. The solenoid valve here plays a switch role in controlling the water flow to ensure that the system allows raw water to pass only when needed. When the electronic control module 600 issues an instruction to allow raw water to pass, the raw water continues to flow to the flow meter 101. The flow meter 101 is used to monitor the flow of raw water to ensure that the system operates according to the designed flow. 1, the raw water passes through the permeable membrane element 301, and the permeable membrane element 301 allows water molecules to pass through, while preventing pollutants and larger dissolved solids from passing through, so that the raw water after passing through is filtered into pure water. It should be noted that the permeable membrane element 301 is divided into a pure water side and a concentrated water side. After passing through the membrane of the permeable membrane element 301, the water molecules gather on the pure water side to form pure water, while the pollutants and water molecules that have not passed through the membrane gather on the concentrated water side to form concentrated water. Further, the pure water passes through the low-pressure solenoid valve 502, and the low-pressure solenoid valve 502 controls the outflow of the pure water to ensure that the pure water enters the pure water storage system at an appropriate flow rate for subsequent use or further treatment.

[0062] Flushing conditions:

[0063] In the flushing condition, the pressure sensor 102 monitors the pressure difference between the pure water side and the concentrated water side of the permeable membrane element 301. When the pressure difference exceeds the preset value, the pressure sensor 102 sends a signal to the electronic control program 602. The electronic control program 602 receives the sensor signal and issues a closing command to the low-pressure solenoid valve 502 to stop the production of pure water and prepare for the flushing process. At the same time, it issues a start command to the high-pressure solenoid valve 504 to allow the raw water to flow to the concentrated water side of the permeable membrane element 301 under high pressure. At this time, the raw water scrubs the concentrated water side surface of the permeable membrane element 301 under high pressure to peel off the pollutants attached to the membrane surface. The concentrated water after flushing is discharged from the system through the high-pressure solenoid valve 504 and the concentrated water drain pipe 503, taking away the stripped pollutants.

[0064] In summary, the present invention uses raw water to hydraulically scrub the reverse osmosis membrane, which can effectively remove biological fouling and inorganic salt precipitation on the membrane surface, has a good scrubbing effect, can meet the use requirements in actual operation, and does not require the use of chemical agents for hydraulic scrubbing, does not produce sewage containing acids, alkalis, scale inhibitors, and oxidizing substances, and has low environmental risks. There is no need to disassemble the reverse osmosis membrane element 301, and unattended cleaning can also be achieved, which greatly reduces labor input.

[0065] Example 2

[0066] This embodiment is the second embodiment of the present invention, which provides a method for stripping contaminants from reverse osmosis influent water, which can effectively remove contaminants on the membrane surface to maintain efficient water treatment performance while avoiding the high cost, safety risks and environmental problems caused by chemical cleaning.

[0067] Specifically, the raw water is pressurized by the boosting module so that the raw water effectively passes through the osmotic membrane element to obtain pure water;

[0068] The outflow of pure water is controlled by the output module to obtain purified pure water and transport it to the pure water storage system;

[0069] The entire reverse osmosis system is controlled by the electronic control module, so that the reverse osmosis system can operate automatically.

[0070] Furthermore, the raw water is pressurized by applying additional pressure to the raw water through a booster pump to overcome the resistance of the osmotic membrane element, ensuring that the raw water can pass through the osmotic membrane at a sufficient flow rate, and the operation of the booster pump is monitored and controlled by the electronic control module to maintain a constant water inlet pressure.

[0071] Furthermore, the pure water output is used to control and guide the outflow of pure water, which includes opening the low-pressure solenoid valve under water production conditions to allow pure water to flow to the pure water storage system through the pure water outlet pipe.

[0072] In summary, the present invention uses raw water to hydraulically scrub the reverse osmosis membrane, which can effectively remove biological fouling and inorganic salt precipitation on the membrane surface, has a good scrubbing effect, can meet the use requirements in actual operation, and does not require the use of chemical agents for hydraulic scrubbing, does not produce sewage containing acids, alkalis, scale inhibitors, and oxidizing substances, and has low environmental risks. There is no need to disassemble the reverse osmosis membrane element, and unattended cleaning can be achieved, which greatly reduces labor input.

[0073] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible without substantially departing from the novel teachings and advantages of the subject matter described in the application (e.g., mounting arrangements, use of materials, color, changes in orientation, etc.). For example, the element shown as integrally formed may be composed of a plurality of parts or elements, the position of the element may be inverted or otherwise changed, and the nature or number or position of the discrete element may be altered or changed. Therefore, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps may be changed or reordered according to an alternative embodiment. In the claims, any "bracket plus function" clause is intended to cover the structure of the execution function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the present invention is not limited to a specific embodiment, but extends to a variety of modifications that still fall within the scope of the appended claims.

[0074] Additionally, in an effort to provide a concise description of example embodiments, all features of an actual implementation may not be described.

[0075] It should be understood that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but for those of ordinary skill having the benefit of this disclosure, the development effort will be a routine task of design, fabrication, and production without undue experimentation.

[0076] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A reverse osmosis water pollutant stripping system, characterized by: include, Monitoring module (100): used to monitor the flow rate and pressure difference of raw water; Connection module (200): used to connect the raw water source and the system to transport the raw water; Osmosis module (300): used to separate pollutants in raw water and produce pure water; The booster module (400) is used to increase the pressure of the raw water so that the raw water can quickly pass through the osmosis module (300); Output module (500): used to discharge various types of water treated by the osmosis module (300) and rinse the osmosis module (300); The electric control module (600) is used to control the operation of the entire reverse osmosis water pollutant stripping program.

2. The reverse osmosis water contaminant stripping system according to claim 1, characterized in that: The monitoring module (100) comprises a flow meter (101) and a pressure sensor (102); The flow meter (101) is used to monitor the flow of raw water to ensure that the system operates at an appropriate flow rate; The pressure sensor (102) is used to monitor the pressure difference between the two sides of the permeation module (300) to determine whether cleaning is required.

3. The reverse osmosis water contaminant stripping system according to claim 2, characterized in that: The connection module (200) comprises a raw water inlet pipe (201) for connecting a raw water source with the system to transport raw water.

4. The reverse osmosis water contaminant stripping system according to claim 3, characterized in that: The osmosis module (300) comprises an osmotic membrane element (301), which is a core component used to separate pollutants in raw water and produce pure water.

5. The reverse osmosis water contaminant stripping system according to claim 4, characterized in that: The boosting module (400) includes a boosting pump (401) for increasing the pressure of raw water so as to pass through the osmotic membrane element (301).

6. The reverse osmosis water contaminant stripping system according to claim 5, characterized in that: The output module (500) comprises a pure water outlet pipe (501), a low-pressure solenoid valve (502), a concentrated water drain pipe (503), and a high-pressure solenoid valve (504); The pure water outlet pipe (501) and the low-pressure solenoid valve (502) are used to transport the pure water treated by the osmotic membrane and control the outflow of the pure water; The concentrated water discharge pipe (503) and the high-pressure electromagnetic valve (504) are used to discharge concentrated water after being treated by the permeable membrane, and are used to flush the permeable membrane element (301) during the cleaning process.

7. The reverse osmosis water contaminant stripping system according to claim 6, characterized in that: The electronic control module (600) includes a water inlet solenoid valve (601) and an electronic control program (602); The water inlet solenoid valve (601) is a switch for controlling the entry of raw water into the system; The electronic control program (602) controls the operation of the entire reverse osmosis water contaminant stripping system, receives the signal from the pressure sensor (102) and sends instructions to the solenoid valve.

8. A method for stripping pollutants from reverse osmosis influent water, based on the above reverse osmosis influent pollutant stripping system, characterized in that: include, The raw water is pressurized by the booster module, so that the raw water can effectively pass through the osmotic membrane element to obtain pure water; The outflow of pure water is controlled by the output module to obtain purified pure water and transport it to the pure water storage system; The entire reverse osmosis system is controlled by the electronic control module, so that the reverse osmosis system can operate automatically.

9. The method for stripping pollutants from reverse osmosis influent according to claim 8, characterized in that: The raw water boosting applies additional pressure to the raw water through a booster pump to overcome the resistance of the osmotic membrane element and ensure that the raw water can pass through the osmotic membrane at a sufficient flow rate. The operation of the booster pump is monitored and controlled by an electronic control module to maintain a constant water inlet pressure.

10. The method for stripping pollutants from reverse osmosis influent water according to claim 9, characterized in that: The pure water output is used to control and guide the outflow of pure water, which includes opening the low-pressure solenoid valve under water production conditions to allow pure water to flow to the pure water storage system through the pure water outlet pipe.

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