Water purification system

Abstract

The invention provides a water purification system, and relates to the technical field of water treatment. The water purification system comprises a water production device, a backwashing device, an aeration device, a stirring device and a detection device, the water production device comprises a membrane pool and a water purification assembly, and the water purification assembly is used for purifying raw water in the membrane pool to form clear water; the detection device is used for detecting the water outlet efficiency of the membrane tank; the backwashing device introduces cleaning liquid into the membrane pool and flushes the water purification assembly and the membrane pool; the aeration device conveys air to the bottom of the membrane tank; and the stirring device stirs the cleaning solution in the membrane pool. According to the water purification system, when the water outlet efficiency is low, the backwashing device flushes the membrane pool and the water purification assembly, the aeration device shatters large dirt into small particles, the stirring device stirs the cleaning liquid to form turbulent flow, stubborn dirt attached to the inner wall of the membrane pool is removed, and the cleaning effect of the water purification system is effectively improved.

Description

Technical Field

[0001] The present application relates to the field of water treatment technology, and in particular to a water purification system. Background Art

[0002] Ultrafiltration membrane water purification technology can achieve a high level of purification effect without adding chemical agents, and is an important part of modern water treatment technology. Existing ultrafiltration membrane water purification equipment is usually equipped with a membrane pool, in which the ultrafiltration membrane is set to filter the raw water. As the filtration time of the ultrafiltration membrane increases, the dirt intercepted by the ultrafiltration membrane will adhere to the side wall of the membrane pool or deposit on the bottom of the pool, so the membrane pool needs to be cleaned regularly.

[0003] The existing ultrafiltration membrane water purification equipment sets the bottom of the membrane pool as a smooth funnel-shaped structure, and connects a sewage pipe to the bottom of the pool, so that the dirt accumulated on the bottom of the pool slides into the sewage pipe through the inclined bottom of the pool. At the same time, it is necessary to regularly inject clean water into the membrane pool to flush and discharge sewage.

[0004] However, there are many dead corners at the bottom of the membrane pool, which are difficult to clean only by tilting the pool bottom and injecting clean water for flushing, and the cleaning effect is poor. Summary of the invention

[0005] The present application provides a water purification system to solve the problem that the existing ultrafiltration membrane water purification equipment only relies on an inclined pool bottom and injecting clean water to flush the membrane pool, which makes it difficult to clean the membrane pool and has a poor cleaning effect.

[0006] The present application provides a water purification system, comprising a water production device, a backwash device, an aeration device, a stirring device and a detection device; the water production device comprises a membrane pool and a water purification component; the water purification component is used to purify raw water in the membrane pool to form clean water; the backwash device is used to inject cleaning liquid into the membrane pool and rinse the water purification component and the membrane pool; the aeration device is used to transport air to the bottom of the membrane pool; the stirring device is used to stir the cleaning liquid in the membrane pool; the detection device is used to detect the water outlet efficiency of the water outlet pipe, when the water outlet efficiency is greater than or equal to a first preset value, raw water is injected into the membrane pool; when the water outlet efficiency is less than the first preset value and greater than or equal to a second preset value, the injection of raw water into the membrane pool is stopped, and the backwash device and the aeration device are turned on; when the water outlet efficiency is less than the second preset value, the injection of raw water into the membrane pool is stopped, and the backwash device, the aeration device and the stirring device are turned on.

[0007] In one possible implementation, the water purification system provided by the present application, the stirring device includes a driving assembly and at least one stirring assembly; the stirring assembly is arranged at the bottom of the membrane pool; the stirring assembly includes a rotating shaft and a plurality of stirring plates, each stirring plate is arranged on the rotating shaft at intervals and fixed to the rotating shaft, and the rotating shaft is rotatably connected to the membrane pool; the driving assembly is connected to the rotating shaft to drive the rotating shaft to rotate.

[0008] In one possible implementation, the water purification system provided by the present application, the driving component includes a motor, a driving gear, at least two transmission gears and a transmission belt; the number of stirring components is at least two; the transmission gears are connected to the rotating shafts one by one, and each transmission gear and driving gear are engaged with the transmission belt; the motor drives the driving gear to rotate, the driving gear drives each transmission gear to rotate through the transmission belt, and each transmission gear drives each rotating shaft to rotate simultaneously.

[0009] In one possible implementation, the water purification system provided in the present application also includes a drain pipe and a drain valve; a drain outlet is opened at the bottom of the membrane pool; the drain pipe is connected to the drain outlet, and the drain valve is arranged on the drain pipe; when the backwash device is turned on for a preset period of time, the drain valve is opened to allow the cleaning liquid in the membrane pool to flow out through the drain pipe.

[0010] In one possible implementation, in the water purification system provided by the present application, when the drain valve is opened, at least one of the aeration device and the stirring device is opened.

[0011] In one possible implementation, the water purification system provided in the present application also includes a siphon; one end of the siphon is connected to a sewage pipe, and the other end of the siphon is used to connect to a sewage pool, and one end of the siphon is higher than the other end of the siphon.

[0012] In one possible implementation, the water purification system provided in the present application also includes an overflow pipe; the overflow pipe is located in the membrane pool, and the overflow pipe is perpendicular to the bottom of the membrane pool, one end of the overflow pipe is connected to the drain pipe, and the end of the overflow pipe away from the drain pipe is lower than the side wall of the membrane pool.

[0013] In one possible implementation, the water purification system provided in the present application, the water production device also includes a water inlet pipe, a water inlet valve and a water outlet pipe; the water purification component includes a bracket and at least one ultrafiltration membrane; the water inlet valve is connected to the water inlet pipe, and the water inlet pipe and the water outlet pipe are both connected to the membrane pool; the bracket is fixed in the membrane pool, and the ultrafiltration membrane is installed on the bracket.

[0014] In one possible implementation, in the water purification system provided by the present application, the backwash device includes a backwash water pump and a backwash pipe; the backwash water pump is connected to the backwash pipe; the backwash water pump is configured to pump the cleaning liquid into the membrane pool through the backwash pipe.

[0015] In one possible implementation, the water purification system provided by the present application, the aeration device includes an aeration pipe, an air supply pipe and an aeration fan; a plurality of aeration holes are provided on the aeration pipe, and the aeration pipe is arranged below the water purification component; the air supply pipe is connected to the aeration pipe, and the aeration fan is connected to the air supply pipe; the aeration fan is configured to transport air to the aeration pipe through the air supply pipe.

[0016] In the water purification system provided in the present application, a water production device introduces raw water into a membrane pool, and a purification component purifies the raw water into drinkable clean water, and then outputs the clean water from the membrane pool. If dirt and other impurities generated by the purified clean water adhere to the membrane pool and the water purification component of the water production device, the water production device needs to be cleaned by a backwash device, an aeration device and a stirring device.

[0017] When the detection device detects that the water output efficiency of the water production device is less than the first preset value and greater than or equal to the second preset value, it proves that the water production device is slightly contaminated. In this case, the injection of raw water into the membrane pool is stopped, the water purification work is stopped, the cleaning liquid is delivered to the membrane pool through the backwash device, and the membrane pool is flushed to loosen the dirt attached to the membrane pool and suspend it in the cleaning liquid. At the same time, the aeration device is turned on to deliver air to the bottom of the membrane pool to generate bubbles in the cleaning liquid. The bursting of the bubbles can break up the large pieces of dirt suspended in the cleaning liquid into small particles of dirt, thereby facilitating the discharge of the cleaning liquid containing dirt from the membrane pool.

[0018] When the water output efficiency is less than the second preset value, it proves that the water production device is seriously polluted and there may be stubborn dirt attached to the membrane pool. It is difficult to clean the dirt with strong adhesion on the membrane pool only by the backwashing device and the aeration device. Therefore, the stirring device is turned on at the same time as the backwashing device and the aeration device. The stirring device stirs the cleaning liquid in the membrane pool to form turbulence. The shear stress of the turbulent flow can remove the dirt on the membrane pool, and then the aeration device breaks up the agglomerated dirt into tiny particles, thereby achieving the cleaning of the water production device.

[0019] In this way, when the water production device is slightly contaminated, it is simply cleaned through the backwash device and the aeration device. When the water production device is seriously contaminated, the cleaning liquid is introduced into the membrane pool through the backwash device and rinsed, and then the stubborn dirt on the membrane pool is removed by the stirring device, and the aeration device breaks up the agglomerated dirt into fine particles. The dirt accumulated on the membrane pool and the water purification component can be cleaned with high cleaning efficiency, thereby ensuring the water output efficiency and water purification quality of the water purification system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 A schematic diagram of the structure of a water purification system provided in an embodiment of the present application;

[0022] Figure 2 for Figure 1 Side view of

[0023] Figure 3 for Figure 1 A top view of

[0024] Figure 4 A schematic diagram of the structure of a stirring device for a water purification system provided in an embodiment of the present application;

[0025] Figure 5 for Figure 4 A top view of

[0026] Figure 6 for Figure 4 Right view of .

[0027] Description of reference numerals:

[0028] 100-water production device; 110-water inlet pipe; 120-membrane pool; 130-water purification component; 131-support; 132-ultrafiltration membrane; 140-water outlet pipe;

[0029] 200-backwash device; 210-backwash water pump; 220-backwash pipe;

[0030] 300-aeration device; 310-aeration pipe; 311-aeration hole; 320-air pipe; 330-aeration fan;

[0031] 400-stirring device; 410-driving assembly; 411-motor; 412-driving gear; 413-transmission gear; 420-stirring assembly; 421-rotating shaft; 422-stirring plate;

[0032] 500-drain pipe; 510-drain valve;

[0033] 600-Overflow pipe.

[0034] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0035] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0036] First, the terms involved in this application are explained:

[0037] Raw water: refers to water obtained directly from nature without any artificial purification treatment.

[0038] As shown in the background technology, in the prior art, the ultrafiltration membrane of the ultrafiltration membrane water purification equipment is arranged in a membrane pool, and the raw water in the membrane pool is filtered to obtain drinkable clean water. However, as the filtration time of the ultrafiltration membrane increases, the dirt intercepted by the ultrafiltration membrane will remain in the membrane pool and adhere to the inner wall of the membrane pool or be deposited on the bottom of the pool. In order to ensure the quality of purified water, the membrane pool needs to be cleaned regularly.

[0039] The existing ultrafiltration membrane water purification equipment sets the bottom of the membrane pool as a smooth slope, forming a funnel-shaped structure. The funnel mouth is connected to the sewage pipe. In daily water purification, the dirt intercepted by the ultrafiltration membrane is deposited at the bottom of the membrane pool, slides down along the slope of the bottom of the pool to the sewage pipe for discharge, and the staff regularly injects clean water into the membrane pool for flushing.

[0040] However, as time goes by, more and more dirt remains in the membrane pool, and some of the dirt will adhere to the bottom of the pool, causing the slope to be not smooth enough, preventing the newly settled dirt from sliding down the slope smoothly, and then causing the sewage pipe to be blocked. At the same time, when the membrane pool is regularly flushed with clean water, some dirt has a high adhesion to the inner wall of the membrane pool, which makes it difficult to directly flush it clean. In addition, there are many dead corners in the membrane pool, and it is difficult to clean every dead corner by flushing alone, so the cleaning effect is poor.

[0041] In response to the above-mentioned technical problems, an embodiment of the present application provides a water purification system, including a water production device, a backwash device, an aeration device, a stirring device and a detection device. The water production device is used to purify raw water into drinkable clean water. When the water output efficiency of the membrane pool detected by the detection device is greater than or equal to a first preset value, the raw water is injected into the membrane pool. The water purification component in the membrane pool purifies the raw water into clean water and then outputs the clean water from the membrane pool to complete the water purification.

[0042] When the water outlet efficiency is less than the first preset value and greater than or equal to the second preset value, it proves that there is slight accumulation of dirt in the membrane pool. Stop injecting raw water into the membrane pool, and inject cleaning liquid into the membrane pool through the backwash device to flush the membrane pool and the water purification component, so that the dirt is suspended in the cleaning liquid. Then, air is input to the bottom of the membrane pool through the aeration device to form bubbles in the cleaning liquid and burst them, thereby breaking up the suspended matter in the cleaning liquid into fine particles. On the one hand, it can avoid the dirt from being deposited on the bottom of the pool when discharging the cleaning liquid, and on the other hand, it can avoid the agglomerated dirt from clogging the pipe where the cleaning liquid flows out during discharge.

[0043] When the water output efficiency is less than the second preset value, it proves that there is a lot of dirt accumulated in the membrane pool. It is difficult to clean all the dirt attached to the inner wall of the membrane pool only by the backwash device and the aeration device. Therefore, it is necessary to quickly stir the cleaning liquid by the stirring device to form turbulence in the cleaning liquid. The turbulent shear stress can be used to clean up the stubborn dirt attached to the inner wall of the membrane pool and the dirt in the cleaning dead corners, thereby cleaning the water production device and ensuring the water output efficiency.

[0044] Therefore, through the joint operation of the backwash device, the aeration device and the stirring device, the accumulated pollutants on the membrane pool and the water purification component can be removed and broken up into tiny particles for discharge, which effectively improves the cleaning effect of the water production device and ensures the water output efficiency and water quality of the water purification system.

[0045] The following specific embodiments are used to describe in detail the technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings:

[0046] See also Figure 1 and Figure 3 As shown, the water purification system of the embodiment of the present application includes a water production device 100, a backwashing device 200, an aeration device 300, a stirring device 400 and a detection device (not shown in the figure); the water production device 100 includes a membrane pool 120 and a water purification component 130; the water purification component 130 is used to purify the raw water in the membrane pool 120 to form clean water; the backwashing device 200 is used to inject a cleaning liquid into the membrane pool 120 and rinse the water purification component 130 and the membrane pool 120; the aeration device 300 is used to transport air to the bottom of the membrane pool 120; the stirring device 400 is used to clean the raw water in ... raw water in the membrane pool 120; the aeration device 300 is used to transport air to the bottom of the membrane pool 120; the stirring device 400 is used to clean the raw water in the membrane pool 120 and rinse the raw water in the membrane pool 120; the aeration device 300 is used to transport air to the bottom of the membrane pool 120; the stirring device 400 is used to clean the raw water in the membrane pool 120 and rinse the raw water in the membrane pool 120; the aeration device 300 is used to clean the raw water in the membrane pool 120 and rinse the raw water in the membrane pool 120; the stirring device 400 is used to clean the raw water in the membrane pool 120 and rinse the raw water in the membrane pool 120; the aeration device 300 is used to transport air to the bottom of the membrane pool 120; the stirring device 00 is used to stir the cleaning liquid in the membrane pool 120; the detection device is used to detect the water outlet efficiency of the water outlet pipe 140. When the water outlet efficiency is greater than or equal to the first preset value, raw water is injected into the membrane pool 120; when the water outlet efficiency is less than the first preset value and greater than or equal to the second preset value, the injection of raw water into the membrane pool 120 is stopped, and the backwash device 200 and the aeration device 300 are turned on; when the water outlet efficiency is less than the second preset value, the injection of raw water into the membrane pool 120 is stopped, and the backwash device 200, the aeration device 300 and the stirring device 400 are turned on.

[0047] In the present application, the specific forms of injecting raw water into the membrane pool 120 and outputting the formed clean water from the membrane pool 120 are not limited in any way in the embodiments of the present application. For example, an inlet pipe 110, an outlet pipe 140 and an inlet valve may be provided, and the inlet pipe 110 and the outlet pipe 140 are both connected to the membrane pool 120. Whether raw water is injected into the membrane pool 120 is controlled by opening and closing the inlet valve, and the formed clean water is output from the membrane pool 120 through the outlet pipe 140.

[0048] After the water production device 100 times purifies water, the dirt in the raw water intercepted by the water purification component 130 will accumulate or adhere to the inner wall of the water purification component 130 and the membrane pool 120, so it is necessary to clean the water production device 100, and a detection device is set at the outlet pipe 140. The detection device detects the water output efficiency to determine whether the water production device 100 needs to be cleaned. The detection device can measure the water output efficiency by detecting the water output volume per unit time, the water quality and other parameters. The specific measured parameters are not limited in the embodiment of the present application, and the result of the water output efficiency that can determine the dirt content in the membrane pool 120 is sufficient. In addition, the detection device can be set to detect in real time, so that when the water output efficiency is low, the water purification system immediately starts the cleaning work to ensure that the water output efficiency of the water production device 100 is always in a qualified state. It can also be set to perform a test every certain time interval, for example, once every 24 hours. When the water output efficiency is detected to be low, the water purification system starts the cleaning work, which can reduce energy consumption while ensuring that the water purification system is basically clean, and there is no need for the detection device to work continuously.

[0049] It should be noted that the first preset value is greater than the second preset value. When the water output efficiency is greater than or equal to the first preset value, it proves that the membrane pool 120 and the water purification component 130 are relatively clean and do not affect the water purification work of the water production device 100. Therefore, the water inlet valve is opened and the water production device 100 continues to perform water purification work.

[0050] When the water output efficiency is less than the first preset value and greater than or equal to the second preset value, it proves that some dirt is accumulated in the membrane pool 120 and the water purification assembly 130, but the amount of dirt is small, and only simple cleaning work is needed to complete the cleaning. At this time, the water inlet valve is closed, the water purification work is stopped, and the cleaning liquid is injected into the membrane pool 120 through the backwash device 200, and the inner wall of the membrane pool 120 and the water purification assembly 130 are washed, and the dirt attached to the inner wall of the membrane pool 120 and the water purification assembly 130 is washed down and suspended in the cleaning liquid. At the same time, the aeration device 300 inputs external air into the bottom of the membrane pool 120. The membrane pool 120 contains cleaning liquid at this time. Therefore, after the air is input, bubbles are generated in the cleaning liquid, and the bubble burst causes the vibration of the cleaning liquid. On the one hand, some dirt attached to the inner wall can be removed and suspended in the cleaning liquid, and on the other hand, the larger dirt such as sludge agglomerated in the cleaning liquid can be broken into tiny particles, preventing large pieces of dirt from being deposited on the bottom of the membrane pool 120 again when the cleaning liquid is discharged. Finally, the cleaning liquid with dirt can be discharged through the drain pipe 500 or other means. The specific method of discharging the cleaning liquid is not limited in the embodiment of the present application. If the cleaning liquid is discharged through the drain pipe 500, the large pieces of dirt are broken into tiny particles through the aeration device 300, which can also prevent the pipeline from being blocked.

[0051] Among them, the cleaning liquid can be clean water, or a liquid with some chemical reagents added can be selected according to actual cleaning needs. When the cleaning liquid is clean water, the backwash device 200 can directly introduce it from the clean water tank into the membrane tank 120 for operation. A special backwash water tank can also be set up to introduce the cleaning liquid from the backwash water tank into the membrane tank 120. The specific properties of the cleaning liquid and the method of injecting the cleaning liquid into the membrane tank 120 from the backwash water tank are not limited in the embodiments of this application.

[0052] When the water output efficiency is less than the second preset value, it proves that there is a lot of dirt accumulated in the membrane pool 120 and the water purification component 130. Relying solely on the backwash device 200 and the aeration device 300 for cleaning may not meet the cleaning requirements. Therefore, it is necessary to turn on the stirring device 400 at the same time. The stirring device 400 is arranged in the membrane pool 120. After the backwash device 200 injects the cleaning liquid into the membrane pool 120, the stirring device 400 quickly stirs the cleaning liquid to generate turbulence. The turbulent shear stress can be used to clean up the more viscous dirt on the inner wall of the membrane pool 120 and the water purification component 130 or the more stubborn dirt generated by the long attachment time in the cleaning dead corners, so that the dirt is suspended in the cleaning liquid. Then, the bubbles generated by the aeration device 300 and the stirring of the stirring device 400 are used to break the dirt in the cleaning liquid into smaller particles. Finally, the cleaning liquid with small particles of dirt is discharged to complete the cleaning of the water production device 100.

[0053] Among them, the specific structure of the stirring device 400 is not limited in the embodiment of the present application, and it only needs to be able to generate turbulence in the cleaning liquid. For example, the stirring device 400 can be a plurality of submersible flow propellers, or a stirring assembly 420 composed of a rotating shaft 421 and a stirring plate 422.

[0054] Therefore, the water purification system of the embodiment of the present application can loosen and clean the dirt with strong adhesion and difficult to clean through the turbulence formed by the stirring device 400, and use the bubbles generated by the aeration device 300 and the stirring of the stirring device 400 to break up large pieces of dirt into small particles, so that all the dirt can be taken out when the cleaning liquid is discharged, thereby completing the cleaning work, improving the effect of cleaning the water production device 100, ensuring the cleanliness of the water production device 100, and then ensuring the water production efficiency and water purification quality of the water purification system.

[0055] In some possible implementations, see Figures 1 to 6 As shown, the stirring device 400 of the embodiment of the present application includes a driving component 410 and at least one stirring component 420; the stirring component 420 is arranged at the bottom of the membrane pool 120; the stirring component 420 includes a rotating shaft 421 and a plurality of stirring plates 422, each stirring plate 422 is arranged on the rotating shaft 421 at intervals and fixed to the rotating shaft 421, and the rotating shaft 421 is rotatably connected to the membrane pool 120; the driving component 410 is connected to the rotating shaft 421 to drive the rotating shaft 421 to rotate.

[0056] It is understandable that since the dirt in the membrane pool 120 is mainly deposited at the bottom of the membrane pool 120, setting the stirring assembly 420 at the bottom of the membrane pool 120 is more conducive to cleaning the dirt at the bottom of the pool, the two ends of the rotating shaft 421 are rotatably connected to the two opposite side walls of the membrane pool 120, and the stirring plates 422 are evenly spaced on the rotating shaft 421. The driving assembly 410 drives the rotating shaft 421 to rotate, and the rotating shaft 421 drives multiple stirring plates 422 to rotate at the same time, thereby stirring the cleaning liquid in the membrane pool 120 to form turbulence. Compared with installing a submersible flow propeller, stirring with multiple stirring plates 422 at the same time consumes less energy, and the stirring force received by various parts in the membrane pool 120 is more uniform, ensuring that each part can be cleaned.

[0057] The number of stirring components 420 is not limited in the embodiment of the present application and can be determined according to the actual size of the membrane pool 120 as long as turbulence can be generated in all parts of the membrane pool 120. When the number of stirring components 420 is two or more, multiple rotating shafts 421 are arranged in parallel at the bottom of the membrane pool 120 to ensure uniform force.

[0058] In some possible implementations, see Figures 1 to 6 As shown, the driving component 410 of the embodiment of the present application includes a motor 411, a driving gear 412, at least two transmission gears 413 (not shown in the figure) and a transmission belt (not shown in the figure); the number of stirring components 420 is at least two; the transmission gears 413 are connected to the rotating shaft 421 in a one-to-one correspondence, and each transmission gear 413 and the driving gear 412 are engaged with the transmission belt; the motor 411 drives the driving gear 412 to rotate, and the driving gear 412 drives each transmission gear 413 to rotate through the transmission belt, and each transmission gear 413 drives each rotating shaft 421 to rotate at the same time.

[0059] In some embodiments, when the number of stirring components 420 is at least two, the driving component 410 needs to drive the rotating shafts 421 of each stirring component 420 to rotate simultaneously. Therefore, the driving component 410 is configured to drive the driving gear 412 to rotate through the motor 411. The transmission belt can be a serrated track or a chain that can engage with the gear. Its specific structure is not limited in the embodiments of the present application, and it only needs to be able to engage with the driving gear 412 and the transmission gear 413. The driving gear 412 drives the transmission belt to move, and the transmission belt drives each transmission gear 413 to rotate simultaneously, thereby driving each rotating shaft 421 to rotate at the same speed at the same time, ensuring that each stirring component 420 works synchronously, so that the cleaning liquid inside the membrane pool 120 is evenly stressed everywhere, thereby ensuring the cleaning effect of the stirring device.

[0060] In some possible implementations, see Figure 1 and Figure 2As shown, the embodiment of the present application also includes a drain pipe 500 and a drain valve 510; a drain outlet is opened at the bottom of the membrane pool 120; the drain pipe 500 is connected to the drain outlet, and the drain valve 510 is arranged on the drain pipe 500; when the backwash device 200 is turned on for a preset period of time, the drain valve 510 is opened to allow the cleaning liquid in the membrane pool 120 to flow out through the drain pipe 500.

[0061] In specific implementation, the water purification system discharges the cleaning liquid with suspended dirt after cleaning from the membrane pool 120 through the drain pipe 500, and sets the drain valve 510 on the drain pipe 500. The drain valve 510 is in a normally closed state. After the backwash device 200 is opened for a certain period of time, the cleaning is completed, and the drain valve 510 is opened to discharge the cleaning liquid in the membrane pool 120 to complete the cleaning. After the membrane pool 120 is emptied, the drain valve 510 is closed to carry out subsequent water purification work. The drain valve 510 can be set to be closed after opening for a predetermined period of time, or a sensor can be set in the membrane pool 120. When it is detected that there is no water in the membrane pool 120, the drain valve 510 can be closed. The specific control logic for controlling the closing of the drain valve 510 is not limited in the embodiment of the present application. After the cleaning liquid is emptied, the drain valve 510 can be closed before the water inlet valve is opened for water purification.

[0062] In some possible implementations, see Figure 1 and Figure 2 As shown, in the water purification system of the embodiment of the present application, when the drain valve 510 is opened, at least one of the aeration device 300 and the stirring device 400 is opened.

[0063] It should be noted that in order to prevent the dirt from being deposited on the bottom of the membrane pool 120 again during the discharge of the cleaning liquid after the drain valve 510 is opened due to the slow flow rate of the cleaning liquid, the aeration device 300 or the stirring device 400 is kept working during the discharge of the cleaning liquid to maintain the fluctuation of the cleaning liquid so that the dirt is always suspended in the cleaning liquid until the cleaning liquid is discharged from the membrane pool 120. This can better remove the dirt and ensure the cleaning effect of the water purification system.

[0064] In some possible implementations, see Figure 1 As shown, the embodiment of the present application also includes a siphon; one end of the siphon is connected to the sewage pipe 500, and the other end of the siphon is used to connect to the sewage pool, and one end of the siphon is higher than the other end of the siphon.

[0065] It is understandable that when the drain pipe 500 discharges the cleaning liquid, a small amount of the cleaning liquid may remain in the drain pipe 500, causing the particles therein to eventually settle on the inner wall of the drain pipe 500. Long-term accumulation may cause the drain pipe 500 to be blocked or affect the sewage discharge efficiency of the drain pipe 500. Therefore, a siphon pipe may be provided to communicate with the drain pipe 500, and the cleaning liquid in the membrane tank 120 may flow into the sewage pool by the siphon effect. The cleaning liquid can automatically flow into the sewage pool without the need for additional power devices such as water pumps, thereby reducing the residual cleaning liquid, reducing the possibility of blockage of the drain pipe 500, and improving the sewage discharge efficiency of the drain pipe 500.

[0066] In some possible implementations, see Figure 1 and Figure 2 As shown, the embodiment of the present application also includes an overflow pipe 600; the overflow pipe 600 is located in the membrane pool 120, and the overflow pipe 600 is perpendicular to the bottom of the membrane pool 120, one end of the overflow pipe 600 is connected to the drain pipe 500, and the end of the overflow pipe 600 away from the drain pipe 500 is lower than the side wall of the membrane pool 120.

[0067] Specifically, the overflow pipe 600 is vertically arranged in the membrane pool 120, and plays a role in limiting the water level in the membrane pool 120. The height of the overflow pipe 600 should be lower than the highest water level that the membrane pool 120 can bear. When there is too much cleaning liquid or raw water in the membrane pool 120, and the water level is higher than the end of the overflow pipe 600 away from the bottom of the pool, the cleaning liquid or raw water will flow into the sewage pipe 500 through the overflow pipe 600, and finally be discharged into the sewage pool. In this way, the water level in the membrane pool 120 can be limited, and the raw water or cleaning liquid can be prevented from overflowing from the pool mouth of the membrane pool 120, so as to keep the outside of the membrane pool 120 clean.

[0068] In some possible implementations, see Figure 1 and Figure 2 As shown, the water production device 100 of the embodiment of the present application also includes a water inlet pipe 110, a water inlet valve and a water outlet pipe 140; the water purification component 130 includes a bracket 131 and at least one ultrafiltration membrane 132; the water inlet valve is connected to the water inlet pipe 110, the water inlet pipe 110 and the water outlet pipe 140 are both connected to the membrane pool 120, the bracket 131 is fixed in the membrane pool 120, and the ultrafiltration membrane 132 is installed on the bracket 131.

[0069] In some embodiments, one end of the water inlet pipe 110 of the water production device 100 is connected to the raw water pool containing raw water, and the other end is connected to the membrane pool 120. The water inlet valve is set on the water inlet pipe 110. The membrane pool 120 can be set at a position lower than the raw water pool. When the water inlet valve is opened, the raw water automatically flows into the membrane pool 120 through the water inlet pipe 110 according to the siphon principle. A water inlet pump can also be set. After the water inlet valve is opened, the raw water is pumped into the membrane pool 120 through the water inlet pump. The specific method of introducing the raw water into the membrane pool 120 is not limited in the embodiment of the present application, and it can enter the membrane pool 120 through the water inlet pipe 110. After the raw water enters the membrane pool 120, the water purification component 130 purifies the raw water to obtain clean water that meets the water purification standard. The clean water flows into the clean water pool through the outlet pipe 140 for use. The output of clean water can also be selected from siphon, outlet pump, etc., and its specific method is not limited in the embodiment of the present application.

[0070] Furthermore, the water purification component 130 can be a bracket 131 and an immersed ultrafiltration membrane 132 arranged on the bracket 131. The immersed ultrafiltration membrane 132 can form a physical barrier on the membrane surface, effectively remove tiny suspended matter, bacteria, viruses and organic matter, thereby obtaining clear and transparent water. After the raw water is injected into the membrane pool 120, the immersed ultrafiltration membrane 132 is immersed in the raw water, and the water enters the membrane through the membrane pores to obtain clean water, in which the impurities are retained on the surface of the membrane and finally settle to the bottom of the membrane pool 120.

[0071] In some possible implementations, see Figure 1 and Figure 3 As shown, the backwash device 200 of the embodiment of the present application includes a backwash water pump 210 and a backwash pipe 220 ; the backwash water pump 210 is connected to the backwash pipe 220 ; the backwash water pump 210 is configured to pump the cleaning liquid into the membrane pool 120 through the backwash pipe 220 .

[0072] In a specific implementation, the backwash pipe 220 can be the same pipe as the outlet pipe 140, that is, the backwash water pump 210 is directly connected to the outlet pipe 140, and part of the clean water in the clean water tank is pumped into the membrane tank 120 through the outlet pipe 140 to rinse the membrane tank 120 and the water purification component 130. The backwash pipe 220 can also be an independent pipe, and the backwash pipe 220 is connected to the clean water tank or a specially set backwash water tank, and the cleaning liquid is pumped into the membrane tank 120 for cleaning through the backwash water pump 210. The cleaning liquid can be clean water, or it can be a solution with some chemical reagents added according to actual needs. The specific structure of the backwash pipe 220 is not limited in the embodiment of the present application, and the cleaning liquid can be introduced into the membrane tank 120 for cleaning.

[0073] Furthermore, a plurality of high-pressure flushing branches may be provided in the backwash device 200, and the high-pressure flushing branches are connected to the backwash water pump 210. The pipe heads of the high-pressure flushing branches are directed toward the side walls and the bottom of the membrane pool 120. The backwash water pump 210 sprays cleaning liquid toward the inner wall of the membrane pool 120 through the high-pressure flushing branches for flushing, thereby cleaning away dirt on the inner wall of the membrane pool 120. Other structures may also be provided to flush the inner wall of the membrane pool 120. The embodiment of the present application does not impose any limitation on this, as long as it can achieve a cleaning effect.

[0074] In some possible implementations, see Figure 1 , Figure 2 and Figure 3 As shown, the aeration device 300 of the embodiment of the present application includes an aeration pipe 310, an air supply pipe 320 and an aeration fan 330; a plurality of aeration holes 311 are provided on the aeration pipe 310, and the aeration pipe 310 is arranged below the water purification assembly 130; the air supply pipe 320 is connected to the aeration pipe 310, and the aeration fan 330 is connected to the air supply pipe 320; the aeration fan 330 is configured to transport air to the aeration pipe 310 through the air supply pipe 320.

[0075] It is understandable that the aeration fan 330 can deliver external air to the aeration pipe 310 through the air delivery pipe 320. The aeration pipe 310 is provided with a plurality of aeration holes 311. The air input by the aeration fan 330 overflows through the aeration holes 311, thereby forming bubbles in the cleaning liquid. The bubbles burst during the upward rise, thereby causing the cleaning liquid to fluctuate and shattering the suspended matter therein into tiny particles. In order to ensure that bubbles can be generated in the water and burst during the rising process, the aeration pipe 310 needs to be set at a lower position, below the water purification component 130. When the generated bubbles burst, the cleaning liquid around the water purification component 130 can fluctuate, thereby promoting the shedding of dirt attached to the water purification component 130 and improving the cleaning effect of the water purification system.

[0076] In summary, the water purification system provided in the embodiment of the present application includes a water production device 100, a backwash device 200, an aeration device 300, a stirring device 400 and a detection device. The water production device 100 is used to purify raw water into clean water, the backwash device 200 is used to introduce cleaning liquid into the membrane pool 120, and flush the membrane pool 120 and the water purification component 130. The aeration device 300 inputs air to the bottom of the membrane pool 120 to form bubbles in the cleaning liquid. The bubbles burst to shatter large pieces of dirt in the cleaning liquid into small particles. The stirring device 400 stirs the cleaning liquid to form turbulence, and uses the turbulent shear stress to remove dirt on the inner wall of the membrane pool 120 to achieve a cleaning effect. When the detection device detects that the water output efficiency is greater than or equal to the first preset value, the water production device 100 continues to purify water. When the water output efficiency is less than the first preset value and greater than or equal to the second preset value, the water production device 100 is turned off, and only the backwash device 200 and the aeration device 300 are opened to clean up a small amount of dirt in the water production device 100. When the water output efficiency is less than the second preset value, the backwash device 200, the aeration device 300 and the stirring device 400 are opened, and the stirring device 400 is used to clean up the stubborn dirt on the inner wall of the membrane pool 120. Therefore, different equipment is opened according to the different degrees of pollution in the water production device 100, so that the water production device 100 can be kept clean while avoiding excessive energy loss. The cleaning effect is good, which is conducive to ensuring the water output efficiency and the quality of water purification.

[0077] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0078] In the embodiments of the present application, the devices or elements referred to or implied must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise precisely and specifically specified.

[0079] The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of the embodiments of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein, for example, can be implemented in an order other than those illustrated or described herein.

[0080] In addition, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus that includes a series of steps or elements is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not explicitly listed or inherent to such process, method, product, or apparatus.

[0081] It should be understood that the various numerical numbers involved in the embodiments of the present application are only used for the convenience of description and are not used to limit the scope of the embodiments of the present application.

[0082] It can be understood that in the embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0083] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the invention disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0084] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A water purification system, characterized in that: It comprises a water production device (100), a backwash device (200), an aeration device (300), a stirring device (400) and a detection device; The water production device (100) comprises a membrane pool (120) and a water purification component (130); The water purification component (130) is used to purify the raw water in the membrane pool (120) to form clean water; The backwash device (200) is used to inject a cleaning liquid into the membrane pool (120) and flush the water purification component (130) and the membrane pool (120); The aeration device (300) is used to transport air to the bottom of the membrane tank (120); The stirring device (400) is used to stir the cleaning liquid in the membrane pool (120); The detection device is used to detect the water output efficiency of the membrane pool (120), and when the water output efficiency is greater than or equal to a first preset value, raw water is injected into the membrane pool (120); When the water output efficiency is less than the first preset value and greater than or equal to the second preset value, stop injecting raw water into the membrane pool (120), and start the backwash device (200) and the aeration device (300); When the water output efficiency is less than a second preset value, the injection of raw water into the membrane pool (120) is stopped, and the backwash device (200), the aeration device (300) and the stirring device (400) are turned on.

2. The water purification system according to claim 1, characterized in that: The stirring device (400) comprises a driving component (410) and at least one stirring component (420); The stirring assembly (420) is arranged at the bottom of the membrane pool (120); The stirring assembly (420) comprises a rotating shaft (421) and a plurality of stirring plates (422), wherein the stirring plates (422) are arranged on the rotating shaft (421) at intervals and are fixedly connected to the rotating shaft (421), and the rotating shaft (421) is rotatably connected to the membrane pool (120); The driving assembly (410) is connected to the rotating shaft (421) to drive the rotating shaft (421) to rotate.

3. The water purification system according to claim 2, characterized in that: The driving assembly (410) comprises a motor (411), a driving gear (412), at least two transmission gears (413) and a transmission belt; The number of the stirring components (420) is at least two; The transmission gears (413) are connected to the rotating shafts (421) in a one-to-one correspondence, and each of the transmission gears (413) and the driving gear (412) is meshed with the transmission belt; The motor (411) drives the driving gear (412) to rotate, and the driving gear (412) drives each of the transmission gears (413) to rotate through the transmission belt, and each of the transmission gears (413) drives each of the rotating shafts (421) to rotate simultaneously.

4. The water purification system according to claim 1, characterized in that: It also includes a sewage pipe (500) and a sewage valve (510); A sewage outlet is provided at the bottom of the membrane pool (120); The sewage discharge pipe (500) is in communication with the sewage discharge port, and the sewage discharge valve (510) is arranged on the sewage discharge pipe (500); After the backwash device (200) is turned on for a preset time, the drain valve (510) is opened to allow the cleaning liquid in the membrane pool (120) to flow out through the drain pipe (500).

5. The water purification system according to claim 4, characterized in that: When the drain valve (510) is opened, at least one of the aeration device (300) and the stirring device (400) is opened.

6. The water purification system according to claim 4, characterized in that: Also included is a siphon; One end of the siphon tube is connected to the sewage pipe (500), and the other end of the siphon tube is used to be connected to the sewage pool. One end of the siphon tube is higher than the other end of the siphon tube.

7. The water purification system according to claim 4, characterized in that: Also includes an overflow pipe (600); The overflow pipe (600) is located in the membrane pool (120), and the overflow pipe (600) is perpendicular to the bottom of the membrane pool (120). One end of the overflow pipe (600) is connected to the sewage pipe (500), and one end of the overflow pipe (600) away from the sewage pipe (500) is lower than the side wall of the membrane pool (120).

8. The water purification system according to any one of claims 1 to 7, characterized in that: The water production device (100) further comprises a water inlet pipe (110), a water inlet valve and a water outlet pipe (140); The water purification component (130) comprises a support (131) and at least one ultrafiltration membrane (132); The water inlet valve is connected to the water inlet pipe (110), and the water inlet pipe (110) and the water outlet pipe (140) are both in communication with the membrane pool (120); The support (131) is fixed in the membrane pool (120), and the ultrafiltration membrane (132) is installed on the support (131).

9. The water purification system according to any one of claims 1 to 7, characterized in that: The backwash device (200) comprises a backwash water pump (210) and a backwash pipe (220); The backwash water pump (210) is in communication with the backwash pipe (220); The backwash water pump (210) is configured to pump the cleaning liquid into the membrane pool (120) through the backwash pipe (220).

10. The water purification system according to any one of claims 1 to 7, characterized in that: The aeration device (300) comprises an aeration pipe (310), an air delivery pipe (320) and an aeration fan (330); The aeration pipe (310) is provided with a plurality of aeration holes (311), and the aeration pipe (310) is arranged below the water purification component (130); The air delivery pipe (320) is in communication with the aeration pipe (310), and the aeration fan (330) is connected to the air delivery pipe (320); The aeration fan (330) is configured to deliver air to the aeration pipe (310) through the air delivery pipe (320).

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