Pickling waterway system and water purifier

Abstract

The utility model discloses an acid pickling waterway system and a water purifier, the acid pickling waterway system comprises: a pipeline system, the pipeline system is provided with an acid storage tank and at least two electrodialysis filter elements with an ion adsorption function, raw water can be produced by any electrodialysis filter element and then is discharged, and acid in the acid storage tank can reversely flow through the electrodialysis filter elements for pickling; the at least two electrodialysis filter elements are arranged in a gradient manner according to a water production quantity difference value A, when any electrodialysis filter element is regenerated, at least one electrodialysis filter element produces water to discharge water, and under the working condition that the electrodialysis filter element is regenerated, in the early stage of regeneration, raw water reversely flows through the electrodialysis filter element needing to be regenerated and wastewater is discharged, and in the later stage of regeneration, the raw water flows through the electrodialysis filter element needing to be regenerated. The electrodialysis filter element capable of producing water produces water and reversely flows through the electrodialysis filter element needing to be regenerated to wash the water. The regeneration of the electrodialysis filter element can be realized, the real-time water supply of the water purifier can be ensured, the water demand of a user is ensured, the energy consumption of the water purifier is reduced, and meanwhile, the water purifier has an acid pickling and descaling function.

Description

Technical Field

[0001] This utility model relates to the field of water purification equipment technology, and in particular to an acid-washable water circuit system and a water purifier. Background Technology

[0002] A water purifier is a water treatment device that performs deep filtration and purification of water according to usage requirements. It achieves desalination and regeneration processes through electrodialysis filter cartridges. Traditional water purifiers use two filter cartridges that regenerate each other. When either filter cartridge is regenerating, all the water produced by the other cartridge is used to regenerate the cartridge that is currently undergoing regeneration. This means that the entire water purifier does not produce water when either filter cartridge is regenerating, significantly reducing the time users can use fresh water and causing inconvenience in daily use.

[0003] To address the aforementioned issues, existing technology discloses a continuous-flow bipolar membrane electro-assisted deionization system, comprising multiple electrodialysis filter cartridges installed in a pipeline system. At least one electrodialysis filter cartridge simultaneously distributes a portion of its produced water as regeneration feed water to other electrodialysis filter cartridges requiring regeneration, thus enabling continuous water production during regeneration and improving user experience. However, scale buildup occurs in the electrodialysis filter cartridges during water production. Even with rinsing with pure water, the cleaning effect is minimal, and a large amount of pure water is wasted, significantly reducing the amount of water available to the user and increasing the energy consumption of the water purifier. Utility Model Content

[0004] To address the aforementioned deficiencies in the existing technology, the purpose of this utility model is to provide a renewable water system and water purifier that can regenerate the electrodialysis filter cartridge, ensure real-time water supply to meet the user's water needs, reduce the energy consumption of the water purifier, and also has an acid washing and descaling function.

[0005] The first aspect of this utility model provides an acid-washable water system, comprising: a pipeline system, an acid storage tank and at least two electrodialysis filter cartridges with ion adsorption function in the pipeline system, wherein raw water can be processed by any electrodialysis filter cartridge and then discharged, and acid in the acid storage tank can flow in reverse through the electrodialysis filter cartridge for acid washing.

[0006] At least two electrodialysis filter cartridges are set in a gradient with a water production difference A. When any electrodialysis filter cartridge is regenerated, at least one electrodialysis filter cartridge produces water to output water. During the electrodialysis filter cartridge regeneration process, in the early stage of regeneration, the raw water flows back through the electrodialysis filter cartridge that needs to be regenerated and discharges wastewater. In the later stage of regeneration, the electrodialysis filter cartridge that can produce water produces water and flows back through the electrodialysis filter cartridge that needs to be regenerated for rinsing.

[0007] As a preferred embodiment, in the first aspect of this utility model, based on the electrodialysis filter cartridge with the lowest water production, the water production difference A is calculated as a percentage of 20% to 50%.

[0008] As a preferred embodiment, in the first aspect of this utility model, when the difference in water production is less than A, the raw water flows through the electrodialysis filter cartridge with a lower remaining water production capacity and is then discharged.

[0009] In a preferred embodiment, in the first aspect of this invention, the acid storage tank contains food-grade acid with a pH value less than 2.

[0010] In a preferred embodiment, in the first aspect of this utility model, raw water flows forward through the raw water pipe through the electrodialysis filter cartridge and is then discharged through the outlet pipe. Raw water flows backward through the regeneration pipe through the electrodialysis filter cartridge and is then discharged through the wastewater pipe. Each electrodialysis filter cartridge is connected in reverse to at least one other electrodialysis filter cartridge via its connected outlet pipe, and each electrodialysis filter cartridge is connected to an acid storage tank via its connected outlet pipe.

[0011] In a preferred embodiment, in the first aspect of this invention, a power pump is provided on the pipeline between the acid storage tank and the electrodialysis filter element.

[0012] As a preferred embodiment, in the first aspect of this utility model, the raw water pipeline is equipped with a raw water valve, the outlet water pipeline is equipped with an outlet water valve, the regeneration pipeline is equipped with a regeneration valve, and the wastewater pipeline is equipped with a wastewater valve. The raw water valve, outlet water valve, regeneration valve, and wastewater valve all include at least one of a straight-through valve, a three-way valve, and a four-way valve.

[0013] In a preferred embodiment, in the first aspect of this utility model, flow meters are provided on both the raw water pipe and the outlet water pipe, and TDS testers are provided on the raw water pipe, the outlet water pipe and the wastewater pipe.

[0014] In a preferred embodiment, in the first aspect of this utility model, a pre-filter is provided on the raw water pipe, and the raw water pipe can be directly connected to the outlet water pipe.

[0015] The second aspect of this utility model provides a water purifier, including: the above-mentioned acid-washable water circuit system.

[0016] The acid-washable water system and water purifier provided by this utility model have the following technical effects:

[0017] At least two electrodialysis filter cartridges have a difference in water production capacity, ensuring that at least one cartridge can produce water during regeneration, thus guaranteeing an uninterrupted water supply to the user and meeting their water needs. Furthermore, regeneration is achieved by reversing the flow of raw water through the cartridge, using reverse current to desorb ions, and then flushing with a small amount of water produced by other cartridges. This avoids relying solely on the cartridges for regeneration, ensuring sufficient water supply, preventing excessive waste, and reducing the water purifier's energy consumption.

[0018] The electrodialysis filter cartridge is immersed in acid by reverse flow through an acid storage tank for a period of time. Then, it is regenerated by rinsing with raw water. This process achieves the purpose of acid washing and descaling, which not only effectively removes scale from the electrodialysis filter cartridge but also reduces water consumption, thus saving water. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the acid-washable water system of this utility model.

[0020] Figure label:

[0021] 1. Acid storage tank; 2. Power pump; 3. Flow meter; 4. TDS meter; 5. Pre-filter; 6. Electrodialysis filter element 1; 7. Electrodialysis filter element 2; 8. Main raw water pipeline; 9. Raw water pipeline 1; 10. Raw water pipeline 2; 11. Three-way valve 1; 12. Three-way valve 2; 13. Wastewater pipeline 1; 14. Three-way valve 3; 15. Wastewater pipeline 2; 16. Regeneration pipeline 1; 17. Three-way valve 4; 18. Outlet pipeline 1; 19. Three-way valve 5; 20. Regeneration pipeline 2; 21. Three-way valve 6; 22. Outlet pipeline 2; 23. Three-way valve 7; 24. Main outlet pipeline; 25. Three-way valve 8. Detailed Implementation

[0022] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings.

[0023] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0025] This utility model provides an acid-washable water system, comprising: a pipeline system, an acid storage tank 1, and at least two electrodialysis filter cartridges with ion adsorption function. Raw water can be processed by any electrodialysis filter cartridge and discharged. Acid in the acid storage tank 1 can flow in reverse through the electrodialysis filter cartridges for acid washing. The at least two electrodialysis filter cartridges are set in a gradient with a difference in water production A. When any electrodialysis filter cartridge is regenerated, at least one electrodialysis filter cartridge produces water and discharges it. During the regeneration of the electrodialysis filter cartridges, in the early stage of regeneration, raw water flows in reverse through the electrodialysis filter cartridge that needs to be regenerated and discharges wastewater. In the later stage of regeneration, the water-producing electrodialysis filter cartridge produces water and flows in reverse through the electrodialysis filter cartridge that needs to be regenerated for rinsing.

[0026] At least two electrodialysis filter cartridges have a difference in water production capacity, ensuring that at least one cartridge can produce water during regeneration, thus guaranteeing an uninterrupted water supply to the user and meeting their water needs. Furthermore, regeneration is achieved by reversing the flow of raw water through the cartridge, using reverse current to desorb ions, and then flushing with a small amount of water produced by other cartridges. This avoids relying solely on the cartridges for regeneration, ensuring sufficient water supply, preventing excessive waste, and reducing the water purifier's energy consumption.

[0027] The electrodialysis filter element is immersed in acid through the acid storage tank 1 for a period of time, and then regenerated by rinsing with raw water. This process achieves the purpose of acid washing and descaling, which not only effectively removes scale from the electrodialysis filter element, but also reduces water consumption and saves water.

[0028] The acid storage tank 1 contains food-grade acid with a pH value less than 2, which can be easily replenished after use. The water system is time-controlled via a network connection or has a built-in timer to back-inject acid into the electrodialysis filter cartridge for descaling according to a preset time. Specifically, the water system can be equipped with a flow meter 3 and / or a timer to detect the cumulative water production and / or cumulative water production time of the electrodialysis filter cartridge. When the detected cumulative water production and / or cumulative water production time reaches a threshold, the acid solution in the acid storage tank 1 is back-injected into the electrodialysis filter cartridge and left to stand for a period of time, such as 8-24 hours. After the time is up, it is continuously rinsed with raw water for 5-10 minutes, and then regenerated once to complete the acid washing.

[0029] It should be noted that, due to the different qualities of raw water, thresholds for water production capacity and / or water production duration need to be set according to the TDS value of the raw water.

[0030] For electrodialysis filter cartridges, during regeneration, raw water flows in reverse through at least one electrodialysis filter cartridge requiring regeneration. This cartridge is energized in reverse to desorb ions from its membrane surface. Simultaneously, at least one electrodialysis filter cartridge processes the raw water to produce water for user consumption. At this stage, the electrodialysis filter cartridge requiring regeneration and the water-producing cartridge are not connected. Towards the end of the regeneration process for the cartridge requiring regeneration, the water-producing cartridge connects to the regenerated cartridge. While still supplying water to the user, a portion of the processed water is used to flush the regenerated cartridge, ensuring complete regeneration.

[0031] It should be noted that this utility model can be multiple electrodialysis filter cartridges that are flushed and regenerated from one electrodialysis filter cartridge, or a single electrodialysis filter cartridge that is flushed and regenerated from multiple electrodialysis filter cartridges, or multiple electrodialysis filter cartridges that are flushed and regenerated from multiple electrodialysis filter cartridges. The specific implementation method depends on the number of electrodialysis filter cartridges and the actual working conditions.

[0032] When only water production is in operation, raw water is processed by at least one electrodialysis filter cartridge before being discharged. The electrodialysis filter cartridge currently producing water will not divert any of its produced water to other cartridges. The electrodialysis filter cartridge of this invention can produce water simultaneously, or only a portion of it can produce water while the other portion remains inactive; the specific implementation depends on the actual operating conditions.

[0033] Specifically, taking the electrodialysis filter cartridge with the lowest water production as the benchmark, the water production difference A is calculated as a percentage, ranging from 20% to 50%. That is, the water production difference A can be 20%, 25%, 30%, 35%, 40%, 45%, 50%, etc., set according to the differences in the number of electrodialysis filter cartridges and actual operating conditions. For example, when the number of electrodialysis filter cartridges is small, the water production difference can be larger; when the number of electrodialysis filter cartridges is large, the water production difference can be smaller. Setting the water production difference ensures that at least one electrodialysis filter cartridge can produce water for the user during regeneration, guaranteeing a normal water usage experience.

[0034] The water production difference can be calculated by measuring the water production of each electrodialysis filter cartridge using a flow meter to ensure the accuracy of the water production difference. When the water production difference is less than A, the raw water flows through the electrodialysis filter cartridge with the lower remaining water production capacity and is then discharged to ensure that the water production difference can be restored to A. This ensures that when the electrodialysis filter cartridge with the lower water production capacity is regenerated, the other electrodialysis filter cartridges have a suitable water production capacity to stably produce water for users.

[0035] At least two electrodialysis filter cartridges are connected in parallel and stacked. This reduces the overall size of the electrodialysis filter cartridges, allowing them to occupy less space in a regenerative water system, thus enabling a more compact water purifier.

[0036] Based on the above structure, raw water flows forward through the raw water pipeline, passes through the electrodialysis filter cartridge to produce water, and then exits through the outlet pipeline. Raw water flows backward through the regeneration pipeline, passes through the electrodialysis filter cartridge, and then exits through the wastewater pipeline. Each electrodialysis filter cartridge is connected in reverse through its outlet pipeline to at least one other electrodialysis filter cartridge, and each electrodialysis filter cartridge is connected to the acid storage tank 1 through its outlet pipeline.

[0037] When only water production is in operation, the raw water pipeline is connected to the forward inlet of at least one electrodialysis filter element, and the forward outlet of the at least one electrodialysis filter element is directly connected to the outlet pipeline, and is disconnected from the wastewater pipeline and the acid storage tank 1.

[0038] When both water production and regeneration are in operation simultaneously, during the initial regeneration phase, at least one electrodialysis filter element is in water production mode. The raw water pipeline is connected to the forward inlet of at least one electrodialysis filter element, and the forward outlet of this filter element is directly connected to the outlet pipeline, while remaining disconnected from the wastewater pipeline and acid storage tank 1, thus only water is supplied to the user. Simultaneously, at least one electrodialysis filter element is in regeneration mode. The raw water pipeline is connected to the reverse inlet of the regenerated electrodialysis filter element, and the reverse outlet of the regenerated filter element is connected to the wastewater pipeline, allowing reverse electrostatic discharge to desorb ions and expel wastewater. During the later regeneration phase, the raw water supply to the regenerated electrodialysis filter element ceases. The water production electrodialysis filter element is connected to the reverse inlet of the regenerated filter element to provide pure water for rinsing before being discharged through the wastewater pipeline.

[0039] When the electrodialysis filter cartridge needs descaling, the acid storage tank 1 is connected to the reverse inlet of the electrodialysis filter cartridge to provide acid solution to the electrodialysis filter cartridge. After standing for a period of time, the acid solution is discharged, and the electrodialysis filter cartridge is backwashed with raw water for a certain period of time and then regenerated once to complete the acid washing and descaling.

[0040] It should be noted that, under descaling conditions, at least one electrodialysis filter element can produce water to ensure the user's water needs are met.

[0041] A power pump 2 is installed on the pipeline between the acid storage tank 1 and the electrodialysis filter element. When it is necessary to descale the electrodialysis filter element, the power pump 2 is started to draw acid from the acid storage tank 1 to the electrodialysis filter element for soaking, and then discharged through the wastewater pipeline.

[0042] The raw water pipeline is equipped with a raw water valve, the effluent pipeline with an effluent valve, the regeneration pipeline with a regeneration valve, and the wastewater pipeline with a wastewater valve. Each of these valves includes at least one of the following: a straight-through valve, a three-way valve, or a four-way valve. The raw water valve, effluent valve, regeneration valve, and wastewater valve are named according to their function to control the opening and closing of each pipeline. One or two valves may share the same valve body, or, in cases with many electrodialysis filter cartridges, a valve with a specific name may have multiple valve bodies, depending on the actual operating conditions. The choice of whether a valve body is a straight-through valve, a three-way valve, or a four-way valve depends on the number of pipeline connections.

[0043] Flow meters 3 are installed on both the raw water pipeline and the effluent pipeline, and TDS meters 4 are installed on the raw water pipeline, effluent pipeline, and wastewater pipeline. The flow meters 3 are used to determine the raw water input flow rate and the water production capacity of each electrodialysis filter element, thereby ensuring the difference in water production capacity. The TDS meters 4 are used to detect the TDS values ​​of the raw water, effluent, and wastewater to determine whether they meet usage requirements and discharge standards.

[0044] A pre-filter cartridge 5 is installed on the raw water pipe, which can be directly connected to the outlet water pipe. The pre-filter cartridge 5 can be used to remove microorganisms, large particulate matter, etc. from the raw water. When the water quality requirements are not high, such as for cooking and washing, the raw water filtered by the pre-filter cartridge 5 can be used directly.

[0045] Based on the above statements, see Figure 1 The following is a detailed description of an acid-washable water system including two electrodialysis filter cartridges connected in parallel. The operating principles of other three-cartridge and multi-cartridge systems are the same, and will not be repeated here.

[0046] The renewable water system includes a piping system and two electrodialysis filter cartridges, 6 and 7, connected in parallel within the piping system. Both cartridges are connected to raw water via raw water pipes. The raw water pipes include a main raw water pipe 8, a first raw water pipe 9, and a second raw water pipe 10. One end of the main raw water pipe 8 is connected to raw water, and the other end is connected to one end of both raw water pipe 9 and raw water pipe 10 via a three-way valve 11. The other end of raw water pipe 9 is connected to the forward inlet of electrodialysis filter cartridge 6, and a three-way valve 12 is installed on raw water pipe 9 to connect to wastewater pipe 13. The other end of raw water pipe 10 is connected to the forward inlet of electrodialysis filter cartridge 7, and a three-way valve 14 is installed on raw water pipe 10 to connect to wastewater pipe 15.

[0047] The other end of the main raw water pipe 8 is connected to one end of the regeneration pipe 16 via a three-way valve 11. The other end of the regeneration pipe 16 is connected to the positive outlet of the electrodialysis filter cartridge 6, and a three-way valve 17 is installed on the regeneration pipe 16 to connect to one end of the outlet pipe 18. Near the three-way valve 11, the raw water pipe 210 is equipped with a three-way valve 19 to divert water to one end of the regeneration pipe 20. The other end of the regeneration pipe 20 is connected to the positive outlet of the electrodialysis filter cartridge 7, and a three-way valve 21 is installed on the regeneration pipe 20 to connect to one end of the outlet pipe 22. The other end of the outlet pipe 18 and the other end of the outlet pipe 22 are both connected to the main outlet pipe 24 via a three-way valve 7 23 to discharge water, and are both connected to the inlet of the acid storage tank 1 via a three-way valve 8 25. The outlet of the acid storage tank 1 is connected to the outlet pipe 18 of the electrodialysis filter element 16 and the outlet pipe 22 of the electrodialysis filter element 27 via a power pump 2.

[0048] Flow meters 3 are installed on the main raw water pipe 8, the first outlet pipe 18, and the second outlet pipe 22. TDS meters 4 are installed on the main raw water pipe 8, the main outlet pipe 24, the first wastewater pipe 13, and the second wastewater pipe 15. A pre-filter 5 is installed on the main raw water pipe 8, following the direction of the raw water flow. The pre-filter 5 is located after the TDS meter 4 on the main raw water pipe 8.

[0049] Thus, the operating principle of this renewable water system is as follows:

[0050] There is a water production difference A between electrodialysis filter cartridge 6 and electrodialysis filter cartridge 7, which can be 20%, 25%, 30%, 35%, 40%, 45%, 50%, etc.

[0051] If only the electrodialysis filter cartridge 6 produces water, the raw water is initially filtered by the pre-filter cartridge 5 on the main raw water pipeline 8, then enters the raw water pipeline 9 through the three-way valve 11, flows through the three-way valve 2 12, and then enters the adsorption ion through the positive inlet of the electrodialysis filter cartridge 6 to produce water. After that, it flows out through the positive outlet of the electrodialysis filter cartridge 6 and then exits through the regeneration pipeline 16, the three-way valve 4 17, the outlet pipeline 18, the three-way valve 8 25, the three-way valve 7 23, and the main outlet pipeline 24. If only electrodialysis filter cartridge 27 produces water, the raw water is initially filtered by pre-filter cartridge 5 on the main raw water pipe 8, then enters the raw water pipe 20 through three-way valve 11, flows through three-way valve 5 19 and three-way valve 3 14, and then enters the adsorption ion port of electrodialysis filter cartridge 27 to produce water. Afterwards, it flows out through the positive outlet of electrodialysis filter cartridge 27 and exits through regeneration pipe 20, three-way valve 6 21, outlet pipe 22, three-way valve 7 23, and the main outlet pipe 24. If both electrodialysis filter cartridge 16 and electrodialysis filter cartridge 27 produce water, both water paths can be opened. Flow meter 3 is used to detect the flow rate of the main raw water pipe 8, outlet pipe 18, and outlet pipe 22 to control the water production difference A.

[0052] If only the electrodialysis filter cartridge 6 is being regenerated, in the initial stage of regeneration, the raw water is initially filtered by the pre-filter cartridge 5 on the main raw water pipe 8, then enters the regeneration pipe 16 through the three-way valve 11, and then enters the positive outlet of the electrodialysis filter cartridge 6 through the three-way valve 4 17. After reverse electro-ion desorption, it is discharged through the positive inlet of the electrodialysis filter cartridge 6, and then enters the wastewater pipe 13 through the three-way valve 2 12 to discharge wastewater. At this time, if the user wants to use water, the raw water is initially filtered by the pre-filter cartridge 5 on the main raw water pipe 8, then enters the raw water pipe 2 10 through the three-way valve 11, flows through the three-way valve 5 19 and the three-way valve 3 14, and then enters the positive inlet of the electrodialysis filter cartridge 2 7 to adsorb ions for water production. Then it flows out through the positive outlet of the electrodialysis filter cartridge 2 7 and then exits through the regeneration pipe 2 20, the three-way valve 6 21, the outlet pipe 2 22, the three-way valve 7 23 and the main outlet pipe 24. During the later stages of regeneration, the raw water supply to electrodialysis filter cartridge 1 (6) ceases. The pure water produced by electrodialysis filter cartridge 2 (7) is diverted at three-way valve 7 (23) to three-way valve 8 (25), outlet pipe 1 (18), three-way valve 4 (17), and regeneration pipe 1 (16). It then enters electrodialysis filter cartridge 1 (6) through its forward outlet to flush it, and exits through its forward inlet. Finally, it enters wastewater pipe 1 (13) through three-way valve 2 (12) to discharge wastewater. Only the regeneration principle of electrodialysis filter cartridge 2 (7) remains the same. During this process, the TDS analyzer 4 is used to detect the raw water quality, effluent quality, and wastewater quality to determine whether the water quality is usable and meets discharge standards.

[0053] During the descaling operation of electrodialysis filter element 6, the power pump 2 is started to draw acid from the acid storage tank 1. The acid solution enters the electrodialysis filter element 6 through the outlet pipe 18, three-way valve 17, regeneration pipe 16, and the forward outlet of the electrodialysis filter element 6. After standing for 8-24 hours, it is discharged through the forward inlet of the electrodialysis filter element 6 and enters the wastewater pipe 13 through three-way valve 2 to discharge wastewater. Then, raw water is introduced and pre-filtered by the pre-filter element 5 on the main raw water pipe 8. After passing through three-way valve 11, it enters the regeneration pipe 16 and then through three-way valve 4 to the forward outlet of the electrodialysis filter element 6 to flush the electrodialysis filter element 6 for 8-10 minutes. The flushed water is then discharged through the forward inlet of the electrodialysis filter element 6 and enters the wastewater pipe 13 through three-way valve 2 to discharge wastewater. Then, a regeneration process is performed to complete the acid washing and descaling of electrodialysis filter element 6. The descaling principle is the same for electrodialysis filter element 7.

[0054] Furthermore, when the water quality requirements are not high, such as for cooking and washing, the raw water can be directly discharged and used through the main water outlet pipe 24 after being filtered by the pre-filter 5 on the main raw water pipe 8.

[0055] In addition to removing magnetism, this utility model also provides a water purifier, including: the above-mentioned acid-washable water circuit system.

[0056] This water purifier ensures at least one electrodialysis filter cartridge provides uninterrupted water supply, guaranteeing the user's water needs. Furthermore, the electrodialysis filter cartridge utilizes reverse electrostatic discharge of raw water to achieve ion desorption. Combined with the purified water produced by the existing electrodialysis filter cartridge, complete regeneration is achieved through rinsing. This eliminates the need for large quantities of purified water from other electrodialysis filter cartridges, ensuring a consistent water supply and reducing the purifier's energy consumption. Simultaneously, without affecting water production, the acid in the acid storage tank 1 can be used to descale the electrodialysis filter cartridge, thoroughly cleaning it and ensuring its purification effect.

[0057] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. An acid-washable water system, characterized in that, include: The pipeline system includes an acid storage tank and at least two electrodialysis filter cartridges with ion adsorption function. Raw water can be processed and discharged after passing through any of the electrodialysis filter cartridges. Acid in the acid storage tank can flow in reverse through the electrodialysis filter cartridges for acid washing. At least two of the electrodialysis filter cartridges are set in a gradient with a water production difference A. When any of the electrodialysis filter cartridges is regenerated, at least one of the electrodialysis filter cartridges produces water to output water. During the regeneration of the electrodialysis filter cartridges, in the early stage of regeneration, the raw water flows back through the electrodialysis filter cartridge that needs to be regenerated and discharges wastewater. In the later stage of regeneration, the electrodialysis filter cartridge that can produce water produces water and flows back through the electrodialysis filter cartridge that needs to be regenerated for rinsing.

2. The acid-washable water system according to claim 1, characterized in that: Based on the electrodialysis filter element with the lowest water production, the water production difference A is calculated as a percentage of 20% to 50%.

3. The acid-washable water system according to claim 1, characterized in that: When the difference in water production is less than A, the raw water flows through the electrodialysis filter cartridge with a lower remaining water production capacity and is then discharged.

4. The acid-washable water system according to claim 1, characterized in that: The acid storage tank contains food-grade acid with a pH value less than 2.

5. The acid-washable water system according to any one of claims 1-4, characterized in that: Raw water flows forward through the raw water pipeline through the electrodialysis filter element and is then discharged through the outlet pipeline. Raw water flows backward through the regeneration pipeline through the electrodialysis filter element and is then discharged through the wastewater pipeline. Each electrodialysis filter element is connected in reverse through its connected outlet pipeline to at least one other electrodialysis filter element, and each electrodialysis filter element is connected to the acid storage tank through its connected outlet pipeline.

6. The acid-washable water system according to claim 5, characterized in that: A power pump is installed on the pipeline between the acid storage tank and the electrodialysis filter element.

7. The acid-washable water system according to claim 5, characterized in that: The raw water pipeline is equipped with a raw water valve, the outlet water pipeline is equipped with an outlet water valve, the regeneration pipeline is equipped with a regeneration valve, and the wastewater pipeline is equipped with a wastewater valve. The raw water valve, the outlet water valve, the regeneration valve, and the wastewater valve all include at least one of a straight-through valve, a three-way valve, and a four-way valve.

8. The acid-washable water system according to claim 5, characterized in that: Both the raw water pipe and the outlet water pipe are equipped with flow meters, and the raw water pipe, the outlet water pipe, and the wastewater pipe are all equipped with TDS testers.

9. The acid-washable water system according to claim 5, characterized in that: The raw water pipe is equipped with a pre-filter, and the raw water pipe can be directly connected to the outlet water pipe.

10. A water purifier, characterized in that, include: The acid-washable water system according to any one of claims 1-9.

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