Water purification method, system and storage medium of pure water circulation supply system

Abstract

The application relates to a water treatment technology and discloses a water purification method of a pure water circulating supply system, which comprises the following steps: when the pure water circulating supply system supplies water to an external water side, based on a first water quality detector and a second water quality detector, the water supply quality and the backwater quality are monitored respectively; when the water supply quality and the backwater quality are both unqualified, a second electric valve is opened, and water in a pure water tank is purified through an EDI module; when the water supply quality is qualified and the backwater quality is unqualified, the second electric valve is opened, and a first electric valve and a third electric valve are closed, so that the backwater enters the pure water tank through a shunt pipeline, and the water in the pure water tank is purified through the EDI module. The application further discloses a pure water circulating supply system and a computer readable storage medium. The application aims to improve the utilization rate of water resources in and out of the pure water circulating supply system.

Description

Technical Field

[0001] This application relates to the field of water treatment technology, and in particular to a water purification method, a pure water circulation supply system, and a computer-readable storage medium. Background Technology

[0002] Currently, for water users with high pure water quality requirements (such as the testing and analysis water used in hospital biochemistry departments), pure water systems that only use reverse osmosis to produce water are no longer sufficient to meet the high water quality requirements. Therefore, it is often necessary to add an EDI (Electrodeionization) device to the water supply pipeline to further remove ions from the water and make the water quality reach above 10 MΩ•cm.

[0003] However, due to the presence of the pure water tank and the return pipeline, the water produced by the EDI device often meets the standards, but after passing through the return pipeline for a long time, the return water on the water side does not meet the standards. At this time, the water in the pure water tank is often discharged to re-process water, which will cause water waste and is not environmentally friendly or economical. Summary of the Invention

[0004] The main objective of this application is to provide a water purification method, a pure water circulation supply system, and a computer-readable storage medium for a pure water circulation supply system, aiming to improve the utilization rate of water resources inside and outside the system.

[0005] To achieve the above objectives, this application provides a water purification method for a pure water circulation supply system. The pure water circulation supply system includes an RO (Reverse Osmosis) tank, a pure water tank, an EDI module, a water supply pipeline, and a return pipeline. The RO tank outlet is connected to the EDI module inlet pipe, and a first electric valve is installed in the pipeline. The pure water tank's first outlet is connected to the EDI module inlet pipe, and a second electric valve is installed in the pipeline. The EDI module outlet is connected to the pure water tank inlet pipe. The pure water tank's second outlet is connected to the water supply pipeline inlet, and the water supply pipeline outlet is used to connect to the inlet of an external water user. The return pipeline inlet is used to connect to the external water user outlet, and the return pipeline outlet is connected to the RO tank inlet. A branch pipeline is also branched into the return pipeline, and the branch pipeline connects to the pure water tank inlet. A third electric valve is installed in the pipeline between the connection point of the return pipeline and the branch pipeline and the RO tank inlet. A first water quality detector and a second water quality detector are respectively installed in the water supply pipeline and the return pipeline. The water purification method of the pure water circulation supply system includes: When the pure water circulation supply system supplies water to the external water user, the supply water quality and return water quality are monitored based on the first water quality detector and the second water quality detector, respectively. When both the supply water quality and the return water quality are found to be substandard, the second electric valve is opened to allow the water in the pure water tank to be purified by the EDI module. When the monitoring detects that the water supply quality is qualified but the return water quality is unqualified, the second electric valve is opened and the first and third electric valves are closed, so that the return water enters the pure water tank through the diversion pipeline, and the water in the pure water tank is purified by the EDI module.

[0006] Optionally, a first valve is provided in the diversion pipeline; After the step of monitoring the supply water quality and return water quality based on the first water quality detector and the second water quality detector, the method further includes: When both the supply water quality and the return water quality are found to be substandard, the third electric valve is opened and the first valve is closed to allow the return water to flow into the RO water tank.

[0007] Optionally, a second valve is further provided in the pipeline between the third electric valve and the outlet of the return pipeline; a first drain pipeline is branched in the pipeline between the second valve and the third electric valve; after the step of monitoring the supply water quality and return water quality based on the first water quality detector and the second water quality detector respectively, the method further includes: When both the supply water quality and the return water quality are found to be substandard, the third electric valve is opened, and the first and second valves are closed, so that the return water can be discharged through the first drain pipe.

[0008] Optionally, the water purification method of the pure water circulation supply system further includes: When the water supply quality is found to be up to standard but the return water quality is found to be substandard, it is necessary to check whether the external water user is in a peak water usage period. If not, then execute the steps of opening the second electric valve, closing the first electric valve and the third electric valve, so that the return water enters the pure water tank through the diversion pipeline, and the water in the pure water tank is purified by the EDI module.

[0009] Optionally, after the step of detecting whether the external water user is in a peak water usage period when the monitored water supply quality is qualified but the return water quality is unqualified, the method further includes: If so, then a preset process is performed on the return water; wherein the preset process includes any one of the following: Open the third electric valve and close the first valve to allow return water to flow into the RO water tank; Open the third electric valve and close the first and second valves to allow the return water to be discharged through the first drain pipe; wherein, a second valve is also provided in the pipe between the third electric valve and the outlet of the return pipe, and the first drain pipe is branched in the pipe between the second valve and the third electric valve.

[0010] Optionally, after the step of performing a preset treatment on the return water, the method further includes: When the return water quality is retested and found to be up to standard, the third electric valve is closed and the first valve is opened so that the return water flows into the pure water tank through the diversion pipeline.

[0011] Optionally, the EDI module further includes a third water quality detector, which is used to detect the quality of the freshwater purified by the EDI module; the water purification method of the pure water circulation supply system further includes: When the quality of the supply water, return water, and fresh water are all found to be substandard, the first and second electric valves are opened to connect the pipeline between the RO water tank and the pure water tank, and to supply water from the RO water tank to the pure water tank.

[0012] Optionally, after the step of monitoring the supply water quality and return water quality based on the first water quality detector and the second water quality detector, the method further includes: When the water supply and return water quality are found to be up to standard, the first electric valve is opened, allowing the pure water supplied by the RO water tank to be supplied to the external water user in sequence through the EDI module, the pure water tank, and the water supply pipeline.

[0013] To achieve the above objectives, this application also provides a pure water circulation supply system, which includes an RO water tank, a pure water tank, an EDI module, a water supply pipeline, and a return pipeline. The RO water tank outlet is connected to the EDI module inlet pipeline, and a first electric valve is installed in the pipeline. The pure water tank's first outlet is connected to the EDI module inlet pipeline, and a second electric valve is installed in the pipeline. The EDI module outlet is connected to the pure water tank inlet pipeline. The pure water tank's second outlet is connected to the water supply pipeline inlet, and the water supply pipeline outlet is used to connect to the inlet of an external water user. The return pipeline inlet is used to connect to the external water user outlet, and the return pipeline outlet is connected to the RO water tank inlet. A branch pipeline is also branched into the return pipeline, and the branch pipeline connects to the pure water tank inlet. A third electric valve is installed in the pipeline between the connection point of the return pipeline and the branch pipeline and the RO water tank inlet. A first water quality detector and a second water quality detector are respectively installed in the water supply pipeline and the return pipeline. The pure water circulation supply system further includes: a memory, a processor, and a computer program stored in the memory and executable on the processor. When the computer program is executed by the processor, it implements the steps of the water purification method of the pure water circulation supply system described above.

[0014] To achieve the above objectives, this application also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of the water purification method of the pure water circulation supply system described above.

[0015] The pure water circulation supply system, computer-readable storage medium, and pure water circulation supply system provided in this application purify the pure water and return water in the pure water tank by controlling the pure water circulation supply system according to the quality of the supplied and returned water. This improves the utilization rate of water resources inside and outside the system. It can also further purify water that does not meet the quality standards inside and outside the system and improve the quality of water use as much as possible without affecting external water use, so as to minimize water discharge and avoid unnecessary waste of water resources. Moreover, the whole process is highly automated, easy to operate, environmentally friendly and economical. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a pure water circulation supply system according to an embodiment of this application; Figure 2 This is a schematic diagram of the water purification method steps of a pure water circulation supply system in one embodiment of this application; Figure 3 This is a schematic diagram of the structure of a pure water circulation supply system according to another embodiment of this application; Figure 4 This is a schematic diagram of the structure of a pure water circulation supply system according to another embodiment of this application; Figure 5 This is a schematic diagram of the structure of a pure water circulation supply system according to another embodiment of this application; Figure 6 This is a schematic diagram of the internal control architecture of a pure water circulation supply system according to an embodiment of this application.

[0017] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0018] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0019] Furthermore, descriptions using terms such as "first" and "second" in this application are for descriptive purposes only (e.g., to distinguish identical or similar elements) and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, technical solutions from different embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If a combination of technical solutions is contradictory or impossible to implement, such a combination should be considered nonexistent and not within the scope of protection claimed in this application.

[0020] Reference Figure 1 In one embodiment, the pure water circulation supply system includes an RO water tank, a pure water tank, an EDI module, a water supply pipeline, and a return pipeline; wherein, the outlet of the RO water tank is connected to the inlet pipeline of the EDI module, and a first electric valve F1 is provided in the pipeline; the first outlet of the pure water tank is connected to the inlet pipeline of the EDI module, and a second electric valve F2 is provided in the pipeline; the outlet of the EDI module is connected to the inlet pipeline of the pure water tank; the second outlet of the pure water tank is connected to the inlet of the water supply pipeline, and the outlet of the water supply pipeline is used to connect to the inlet of the external water user; the inlet of the return pipeline is used to connect to the outlet of the external water user, and the outlet of the return pipeline is connected to the inlet of the RO water tank; the return pipeline also has a branch pipeline, which is connected to the inlet of the pure water tank through the branch pipeline, and a third electric valve F3 is provided in the pipeline between the connection between the return pipeline and the branch pipeline and the inlet of the RO water tank; a first water quality detector J1 and a second water quality detector J2 are respectively provided in the water supply pipeline and the return pipeline.

[0021] In this embodiment, the RO water tank is used to store the pure water produced by the reverse osmosis system (the pure water produced by the reverse osmosis system can be transported to the RO water tank through the corresponding pipeline (not shown in the figure)). The outlet of the RO water tank is connected to the inlet pipeline of the EDI module, and a first electric valve F1 is provided in the pipeline. By controlling the opening or closing of the first electric valve F1, the flow of pure water in the RO water tank to the EDI module can be controlled. That is, when the first electric valve F1 is open, the pure water in the RO water tank can flow to the EDI module through the corresponding pipeline; when the first electric valve F1 is closed, the RO water tank stops supplying water to the EDI module.

[0022] Optionally, the EDI module is mainly used to further remove ions from the pure water, making the water purer and ensuring its stability. The pure water (i.e., purified water) further purified by the EDI module can then flow through corresponding pipes to the pure water tank for storage.

[0023] The first outlet of the pure water tank is connected to the inlet pipe of the EDI module, and a second electric valve F2 is installed in the pipe. By controlling the opening or closing of the second electric valve F2, the flow of pure water in the pure water tank to the EDI module can be controlled. That is, when the second electric valve F2 is open, the pure water in the pure water tank can flow back to the EDI module through the corresponding pipe and be purified again by the EDI module to further remove residual ions or impurities and improve the purity of the water. When the second electric valve F2 is closed, the pure water tank stops supplying water to the EDI module.

[0024] Optionally, the second outlet of the pure water tank is connected to the external water user side outside the system through a water supply pipeline, and pure water is supplied to the external water user side through the water supply pipeline; while the external water user side is connected back to the system through a return pipeline, and wastewater or excess water generated during use (collectively referred to as return water) is returned to the system through the return pipeline, thus forming a water circulation.

[0025] The external water-using side refers to the water-using environment or facilities outside the system. This can refer to various water-using scenarios in residential, industrial, commercial, or other fields, such as homes, factories, offices, schools, hospitals, and public places. Taking a hospital as an example, the external water-using side could be water-using points such as the hospital's testing center, laboratories, pathology department, and experimental areas.

[0026] Optionally, the return pipe inlet is used to connect to the outlet of the external water supply side, and the return pipe outlet is connected to the RO water tank inlet. A third electric valve F3 is installed in the pipe between the connection point of the return pipe and the branch pipe and the RO water tank inlet. In addition, the return pipe is also branched into a branch pipe, which is connected to the pure water tank inlet. A first valve K1 is installed in the branch pipe, wherein the first valve K1 can be an electric valve or a manually controlled valve.

[0027] Optionally, the flow of water returning from the external water-use side to the RO water tank and / or pure water tank can be controlled by opening or closing the third electric valve F3 and the first valve K1. Specifically, when the third electric valve F3 is open and the first valve K1 is closed, the water returning from the external water-use side flows to the RO water tank; when both the third electric valve F3 and the first valve K1 are open, the water returning from the external water-use side flows to both the RO water tank and the pure water tank; when the third electric valve F3 is closed and the first valve K1 is open, the water returning from the external water-use side flows to the pure water tank; when both the third electric valve F3 and the first valve K1 are closed, the water returning from the external water-use side no longer flows to the RO water tank and the pure water tank.

[0028] Optionally, a first water quality detector J1 is installed in the water supply pipeline to detect the quality of pure water supplied to the external water user; a second water quality detector J2 is installed in the return pipeline to detect the quality of water returning from the external water user.

[0029] Optionally, the water quality detector can be a resistivity meter, used to measure the resistivity or conductivity of water. This can indirectly determine the quality and purity of water by measuring the concentration of ions in the water. When the resistivity or conductivity of water is within a certain threshold, the water quality can be judged to be good, close to the requirements of target pure water; if the resistivity or conductivity exceeds a certain threshold, it means that there are impurities, dissolved solids or other impurities in the water, resulting in poor water quality (i.e., the water quality is unqualified).

[0030] Generally, when the pure water circulation supply system supplies water to the external water user side, the first electric valve F1 remains open while the second electric valve F2 is closed. At this time, the pure water in the RO water tank can flow to the EDI module through the corresponding pipeline and be purified by the EDI module. The pure water purified by the EDI module (i.e., clean water) can then flow to the pure water tank for storage through the corresponding pipeline. The pure water in the pure water tank will flow into the water supply pipeline through the second outlet and supply pure water to the external water user side through the water supply pipeline. The external water user side will then return the wastewater or excess water (collectively referred to as return water) generated during use to the system through the return pipeline, thus forming a water circulation.

[0031] In one embodiment, a water purification method for a pure water circulation supply system is proposed and applied to the aforementioned pure water circulation supply system; refer to Figure 2 The water purification method of the pure water circulation supply system includes: Step S10: When the pure water circulation supply system supplies water to the external water user, the supply water quality and return water quality are monitored based on the first water quality detector and the second water quality detector, respectively. Step S20: When both the water supply quality and the return water quality are found to be substandard, open the second electric valve to allow the water in the pure water tank to be purified by the EDI module. Step S30: When the water supply quality is found to be qualified but the return water quality is not qualified, open the second electric valve and close the first and third electric valves to allow the return water to enter the pure water tank through the diversion pipeline, and allow the water in the pure water tank to be purified by the EDI module.

[0032] In this embodiment, the execution terminal can be a pure water circulation supply system, or other equipment or devices that control the pure water circulation supply system. The following description uses a pure water circulation supply system as an example of the embodiment's terminal.

[0033] As described in step S10, during the normal water supply process from the pure water circulation supply system to the external water user, the first water quality detector J1 installed in the water supply pipeline and the second water quality detector J2 installed in the return pipeline are activated. The first water quality detector J1 and the second water quality detector J2 are used to monitor the quality of pure water in the water supply pipeline (i.e., water supply quality) and the quality of water returning from the external water user in the return pipeline (i.e., return water quality).

[0034] Optionally, when the values ​​corresponding to the water supply quality and return water quality are obtained (such as measured by resistivity or conductivity), they are compared with the corresponding first preset threshold. If they exceed the first preset threshold, it means that the water quality is unqualified; if they are within the first preset threshold, it means that the water quality is qualified.

[0035] Since different regions and application fields have different water quality standards and guidelines, such as national, regional or industry drinking water standards, water quality requirements issued by environmental protection agencies, the specific value of the first preset threshold is determined according to the specific water quality requirements and related standards and regulations. This implementation does not limit this.

[0036] As described in step S20, if both the supply water quality and the return water quality are found to be substandard, the second electric valve F2 can be opened to connect the pipeline between the first outlet of the pure water tank and the EDI module. The second electric valve F2 then controls the water in the pure water tank to flow back to the EDI module for further treatment. At this time, a circulation pipeline can be formed between the pure water tank, the second electric valve F2, and the EDI module (i.e., the water in the pure water tank can circulate between the circulation pipelines), allowing the EDI module to circulate and purify the water in the pure water tank until the first water quality detector J1 detects that the supply water quality is qualified. Then, the second electric valve F2 is closed, stopping the circulation and purification process.

[0037] Optionally, to improve the efficiency of circulating and purifying the water in the pure water tank, the first electric valve F1 can be temporarily shut off when the second electric valve F2 is opened, so that the pure water in the RO water tank no longer flows into the EDI module. This allows the purification efficiency of the EDI module to be concentrated on the circulating purification of the pure water tank, thereby improving the purification efficiency. After the circulating purification of the pure water tank is completed (i.e., after the second electric valve F2 is closed), the first electric valve F1 is reopened, allowing the pure water in the RO water tank to flow to the EDI module through the corresponding pipes and undergo purification by the EDI module.

[0038] Optionally, to avoid affecting the water demand of the external water user, it is possible to check whether the external water user is in a peak water usage period before starting the circulation purification process. If the external water user is in a peak water usage period, the circulation purification process will not be started temporarily (at this time, the first electric valve F1 can remain open, allowing the EDI module to continue producing purified water to supply the pure water tank; at the same time, the first valve K1 can be closed to prevent backflow from further contaminating the water in the pure water tank). The pure water tank will then be circulated and purified when the external water user is in a low water usage period.

[0039] The peak water usage period can be determined based on the water usage situation and relevant regulations in the region where the system is located (or a pre-arranged agreement with external water users). The peak water usage period is usually during a specific time of day (e.g., 8:00-24:00).

[0040] In this way, when the water output from the pure water tank is substandard, it does not need to be discharged. Instead, the water can be purified again, thereby improving the utilization rate of water resources, reducing water waste, and the whole process is highly automated and easy to operate.

[0041] As described in step S30, if the first water quality detector J1 detects that the water supply quality is qualified (indicating that the water quality in the pure water tank is fine), but the second water quality detector J2 detects that the return water quality is unqualified (indicating that the return water does not meet the standards, such as serious water pollution from the external water user), then the third electric valve F3 is closed and the first valve K1 is opened, allowing the return water to flow directly back into the pure water tank through the diversion pipeline; simultaneously, the first electric valve F1 is closed and the second electric valve F2 is opened, forming a circulation pipeline between the pure water tank, the second electric valve F2, and the EDI module, and the EDI module circulates and purifies the water in the pure water tank (while also treating the water entering the pure water tank). Return water is returned until the second water quality detector J2 detects that the return water quality is qualified. Then, the second electric valve F2 is closed and the first electric valve F1 is opened, so that the pure water in the RO water tank continues to supply the EDI module and the pure water tank. (At this time, the third electric valve F3 can be reopened and the first valve K1 can be closed, so that the return water can enter the RO water tank and go from the RO water tank to the EDI module for purification treatment; or, if the return water quality is very good (such as the corresponding quality value is detected to be less than the second preset threshold; where the second preset threshold is less than the first preset threshold), the third electric valve F3 can be closed and the first valve K1 can be opened, so that the return water flows directly back to the pure water tank for reuse).

[0042] Optionally, the water purification method of the pure water circulation supply system further includes: When the water supply quality is found to be up to standard but the return water quality is found to be substandard, it is necessary to check whether the external water user is in a peak water usage period. If not, then execute the steps of opening the second electric valve F2, closing the first electric valve F1 and the third electric valve F3, so that the return water enters the pure water tank through the diversion pipeline, and the water in the pure water tank is purified by the EDI module.

[0043] Optionally, to avoid affecting the water demand of the external water user, if the monitored water supply quality is qualified but the return water quality is unqualified, it is possible to first check whether the external water user is in a peak water usage period. If the external water user is in a peak water usage period, the circulation purification process is temporarily not activated (at this time, the first electric valve F1 can remain open, allowing the EDI module to continue producing purified water to supply the pure water tank; at the same time, the first valve K1 can be closed to prevent the return water from contaminating the water in the pure water tank). Once it is detected that the external water user is no longer in a peak water usage period (i.e., in a low water usage period), the steps of opening the second electric valve F2, closing the first electric valve F1 and the third electric valve F3 are executed, allowing the return water to enter the pure water tank through the diversion pipeline, and allowing the water in the pure water tank to be purified by the EDI module, so as to circulate and purify the water in the pure water tank and the return water entering the pure water tank.

[0044] In one embodiment, by controlling the pure water circulation supply system according to the quality of the supplied and returned water, the pure water and returned water in the pure water tank are purified, thereby improving the utilization rate of water resources inside and outside the system. Without affecting external water use, the system can further purify water that does not meet the quality standards inside and outside the system and improve the water quality, so as to minimize water discharge and avoid unnecessary waste of water resources. Moreover, the whole process is highly automated, easy to operate, environmentally friendly and economical.

[0045] In one embodiment, based on the above embodiment, after the step of monitoring the supply water quality and return water quality respectively based on the first water quality detector and the second water quality detector, the method further includes: When both the supply water quality and the return water quality are found to be substandard, the third electric valve is opened and the first valve is closed to allow the return water to flow into the RO water tank.

[0046] In this embodiment, if both the supply water quality and the return water quality are found to be substandard at the same time, the treatment measure for the return water can be to open the third electric valve F3 to return the water in the return pipeline to the RO water tank, and keep the first valve K1 closed to prevent the return water from flowing back to the pure water tank through the diversion pipeline, so as to avoid the return water from further affecting the water quality in the pure water tank.

[0047] The return water flowing back into the RO water tank needs to be purified by the EDI module before it enters the pure water tank.

[0048] In some alternative implementations, refer to Figure 3A second valve K2 is also provided in the pipeline between the third electric valve F3 and the outlet of the return pipeline; a first drain pipeline P1 is branched in the pipeline between the second valve K2 and the third electric valve F3; a third valve (not shown in the figure) is provided in the first drain pipeline P1. The second and third valves can be electric valves or manually controlled valves.

[0049] Optionally, after the step of monitoring the supply water quality and return water quality based on the first water quality detector J1 and the second water quality detector J2 respectively, the method further includes: When both the supply water quality and the return water quality are found to be substandard, the third electric valve F3 is opened, and the first valve K1 and the second valve K2 are closed, so that the return water can be discharged through the first drain pipe P1.

[0050] Optionally, if both the supply water quality and the return water quality are found to be substandard at the same time, the treatment for the return water can be to open the third electric valve F3 and the third valve, and close the first and second valves K2. At this time, the poor-quality return water can be discharged from the system through the first drainage pipe P1, thus preventing the return water from further affecting the water quality inside the system.

[0051] Alternatively, when the quality value of the returned water exceeds the first preset threshold, it can be further detected whether the quality value exceeds the third preset threshold. The third preset threshold is greater than the first preset threshold, and if the quality of the returned water is between the first and third preset thresholds, it indicates that the water is slightly polluted; if the quality of the returned water exceeds the third preset threshold, it indicates that the water is heavily polluted.

[0052] Optionally, if the quality value of the returned water exceeds the third preset threshold, the returned water is discharged through the first drain pipe P1; if the quality value of the returned water is between the first preset threshold and the third preset threshold, the returned water is controlled to flow back to the RO water tank through the return pipe, and then the returned water and RO pure water enter the EDI module together for purification treatment.

[0053] In this way, precise treatment can be carried out based on the different qualities of the recycled water, improving the efficiency of water resource utilization, while avoiding the continued recycling of heavily polluted recycled water.

[0054] In one embodiment, based on the above embodiment, a first valve is provided in the diversion pipeline; after the step of detecting whether the external water user is in a peak water usage period when the water supply quality is qualified and the return water quality is unqualified, the method further includes: If so, then a preset process is performed on the return water; wherein the preset process includes any one of the following: Open the third electric valve and close the first valve to allow return water to flow into the RO water tank; Open the third electric valve and close the first and second valves to allow the return water to be discharged through the first drain pipe; wherein, a second valve is also provided in the pipe between the third electric valve and the outlet of the return pipe, and the first drain pipe is branched in the pipe between the second valve and the third electric valve.

[0055] In this embodiment, when the water supply quality is qualified, the return water quality is unqualified, and the external water user is in the peak water usage period, the third electric valve F3 can be opened to return the water in the return pipeline to the RO water tank, and the first valve K1 is kept closed to prevent the return water from flowing back to the pure water tank through the diversion pipeline, so as to avoid the return water affecting the water quality in the pure water tank.

[0056] Alternatively, if the system also has a first drainage pipe P1, when the first water quality detector J1 detects that the water quality is qualified, while the second water quality detector J2 detects that the water quality is unqualified, and the external water user is in the peak water usage period, the third electric valve F3 and the third valve can be opened, and the first and second valves K2 can be closed. At this time, the poor quality return water can be discharged from the system through the first drainage pipe P1, avoiding the return water from affecting the pure water quality inside the system.

[0057] Alternatively, if the quality value of the returned water exceeds the third preset threshold, the returned water will be discharged through the first drain pipe P1; if the quality value of the returned water is between the first preset threshold and the third preset threshold, the returned water will be controlled to flow back into the RO water tank through the return pipe.

[0058] In one embodiment, based on the above embodiment, after the step of performing preset treatment on the return water, the method further includes: When the return water quality is retested and found to be up to standard, the third electric valve is closed and the first valve is opened so that the return water flows into the pure water tank through the diversion pipeline.

[0059] In this embodiment, when the quality of the return water is found to be qualified again (at this time, the quality of the supply water is generally also found to be qualified), the third electric valve F3 is closed and the first valve K1 is opened so that the return water flows into the pure water tank through the diversion pipeline, so as to realize the reuse of the return water.

[0060] Alternatively, if the quality value of the returned water is detected to be less than the first preset threshold, and the returned water quality is determined to be qualified, further testing can be performed to determine if the quality value of the returned water is less than the second preset threshold. Specifically, if the returned water quality value is less than the second preset threshold, indicating excellent water quality, the third electric valve F3 can be closed, and the first valve K1 can be opened, allowing the returned water to flow into the pure water tank via the diversion pipe. If the returned water quality value is less than the first preset threshold but greater than or equal to the second preset threshold, the third electric valve F3 remains open, the first valve K1 remains closed, and the returned water flows into the RO water tank via the return pipe. This allows the returned water to enter the EDI module for further purification before flowing into the pure water tank.

[0061] In this way, different treatment schemes are implemented for the return water according to different return water quality values, thereby ensuring that the water quality in the system is up to standard and the purification treatment is effective, and ensuring that the system can continuously provide high-quality pure water.

[0062] In one embodiment, based on the above embodiments, the EDI module further includes a third water quality detector, which is used to detect the quality of the freshwater purified by the EDI module; the water purification method of the pure water circulation supply system further includes: When the quality of the supply water, return water, and fresh water are all found to be substandard, the first and second electric valves are opened to connect the pipeline between the RO water tank and the pure water tank, and to supply water from the RO water tank to the pure water tank.

[0063] In this embodiment, refer to Figure 4 The EDI module includes a booster pump unit, a first filter G1, and an EDI device. The inlet of the booster pump unit is the inlet of the EDI module, the outlet of the booster pump unit is connected to the inlet pipe of the first filter G1, the outlet of the first filter G1 is connected to the inlet pipe of the EDI device, and the pure water outlet of the EDI device is the outlet of the EDI module.

[0064] Optionally, a booster pump unit is located at the inlet of the EDI module, and its function is to pressurize the water entering the EDI module. The booster pump unit may include one or more booster pumps (not shown in the figure).

[0065] Optionally, the outlet of the booster pump unit is connected to the inlet pipe of the first filter G1. The function of the first filter G1 is to remove suspended particles and larger impurities from the water to ensure the cleanliness of the water before it enters the EDI device for further purification. The first filter G1 can effectively remove solid particles and other impurities from the water through physical filtration. The first filter G1 can be a microporous filter.

[0066] Optionally, the outlet of the first filter G1 is connected to the inlet pipe of the EDI device. The EDI device is the core component of electro-ion exchange. Through the selective permeability and barrier properties of the ion exchange membrane, it removes ions and other impurities from the water by means of ion exchange and electroadsorption, thereby obtaining high-purity purified water. The EDI device can treat water using multiple steps such as chemical reaction, electro-action, ion exchange, and physical adsorption, producing two fluids, pure water and concentrated water, in the process.

[0067] Optionally, the EDI module's outlet is the pure water outlet of the EDI device, where high-purity purified water flows out. The pure water outlet is connected to the inlet pipe of the pure water tank, injecting pure water into the tank, which is then supplied to external users via subsequent water supply lines.

[0068] In this way, through the combination of the booster pump unit, the first filter G1 and the EDI device, the EDI module can effectively purify the water and produce high-purity pure water, further improving the pure water quality of the system.

[0069] Optionally, the EDI module further includes a second drain pipe P2, the concentrate outlet of the EDI device is connected to the second drain pipe P2, and the second drain pipe P2 is provided with a fourth valve (not shown in the figure).

[0070] Optionally, in addition to producing high-purity purified water, the EDI unit may also generate a portion of concentrate. This concentrate is a byproduct of the EDI process and contains removed ions and other impurities. This concentrate is discharged through a second drain pipe, P2, connected to the concentrate outlet of the EDI unit.

[0071] Optionally, a fourth valve is located in the second drain line P2 and is used to control the flow direction and discharge of concentrated water. The opening and closing operation and adjustment of the fourth valve can control the discharge volume and frequency of concentrated water. The fourth valve can be an electric valve or a manually controlled valve.

[0072] In this way, by introducing the second drainage pipe P2 and the fourth valve, the concentrated wastewater generated by the EDI unit can be effectively treated. By controlling the opening and closing of the fourth valve, the concentrated wastewater can be properly treated and discharged, thereby improving the system's operating efficiency and reducing its environmental impact.

[0073] Optionally, a third water quality detector J3 is installed in the pipe between the pure water outlet and the pure water tank inlet of the EDI device. The third water quality detector J3 is identical to the first and second water quality detectors J2, and is also used to detect water quality. Because the third water quality detector J3 is installed in the pipe between the pure water outlet and the pure water tank inlet of the EDI device, the purification effect of the EDI device on the pure water can be detected through the third water quality detector J3, i.e., the corresponding pure water quality can be monitored.

[0074] Optionally, the first electric valve F1 and the second electric valve F2 are connected by a corresponding pipe, and the inlet of the EDI module is connected to the pipe connecting the first electric valve F1 and the second electric valve F2.

[0075] Optionally, if the first, second, and third water quality detectors J3 simultaneously detect substandard water quality (i.e., the supply water quality, return water quality, and fresh water quality are all substandard), it indicates that not only is the water quality in the entire system's circulation loop substandard, but the purification effect of the EDI module is also poor (e.g., the water is severely polluted and difficult to purify quickly) or purification fails (e.g., the relevant equipment components in the EDI module are aging or damaged). In this case, the first electric valve F1 and the second electric valve F2 are opened simultaneously, allowing the RO water tank and the pure water tank to be directly connected through a pipeline. The pure water flowing out of the RO water tank flows into the pure water tank through the first electric valve F1 and the second electric valve F2 in sequence, so that the pure water tank can directly supply water to the external water user through the water supply pipeline based on the pure water provided by the RO water tank to meet the external water demand.

[0076] This provides an emergency water supply route in case the EDI module malfunctions or the internal water quality fails to meet requirements, ensuring that external water demand can be met.

[0077] Once the third water quality detector J3 detects that the freshwater quality is up to standard again, it indicates that the purification process of the EDI module has been restored. At this point, the emergency water supply plan is stopped, and the control system switches to the corresponding operating mode (i.e., returns to the execution step S10) based on the detection results of the first and second water quality detectors J2.

[0078] In one embodiment, based on the above embodiment, after the step of monitoring the supply water quality and return water quality respectively based on the first water quality detector and the second water quality detector, the method further includes: When the water supply and return water quality are found to be up to standard, the first electric valve is opened, allowing the pure water supplied by the RO water tank to be supplied to the external water user in sequence through the EDI module, the pure water tank, and the water supply pipeline.

[0079] In this embodiment, if the system detects that both the supply water quality and the return water quality are qualified, it can control the first electric valve F1 to remain open and control the second electric valve F2 to close. At this time, the pure water in the RO water tank can flow to the EDI module through the corresponding pipeline and be purified by the EDI module. The pure water purified by the EDI module (i.e., clean water) can then flow to the pure water tank for storage through the corresponding pipeline. The pure water in the pure water tank will flow into the water supply pipeline through the second outlet and supply pure water to the external water user through the water supply pipeline. The external water user will then return the wastewater or excess water (collectively referred to as return water) generated during use to the system through the return pipeline, thus forming a water cycle.

[0080] Furthermore, regarding the return water flowing back into the system, if the return water quality value is less than the second preset threshold, indicating excellent water quality, the third electric valve F3 can be closed and the first valve K1 opened, allowing the return water to flow into the pure water tank through the diversion pipeline; if the return water quality value is less than the first preset threshold but greater than or equal to the second preset threshold, the third electric valve F3 remains open and the first valve K1 remains closed, allowing the return water to flow into the RO water tank through the return pipeline, so that the return water can enter the EDI module for further purification treatment before flowing into the pure water tank.

[0081] In one embodiment, based on the above embodiments, in order to further improve the water supply quality of the pure water circulation supply system, refer to... Figure 5 The water supply pipeline is provided with a water supply pump unit, a sterilizer and a second filter G2 in sequence from the inlet to the outlet, and the first water quality detector J1 is installed in the pipeline between the second filter G2 and the outlet of the water supply pipeline.

[0082] In this embodiment, the water supply pump unit is located at the inlet of the water supply pipeline. It is responsible for not only pushing pure water from the pure water tank to the sterilizer, but also ensuring that the water entering the water supply pipeline can obtain sufficient kinetic energy to pass smoothly through the entire water supply pipeline until it reaches the external water user.

[0083] Optionally, the water supply pump unit can be equipped with one or more water supply pumps (not shown in the figure). This ensures that the water supply system can meet the needs of the external water user when a larger flow rate or higher pressure is required. By setting up multiple water supply pumps, flow rate and pressure can be regulated and balanced. When one water supply pump requires maintenance or fails, the other pumps can continue to operate, ensuring the continuity and reliability of the water supply.

[0084] The water supply pump can be of a suitable type, such as a centrifugal pump or a positive displacement pump, depending on the requirements and design parameters.

[0085] Optionally, the sterilizer is the next processing unit after the water supply pump unit, used to sterilize the water entering the water supply pipeline to ensure hygiene and safety during the water supply process. The sterilizer can be a flow-through ultraviolet sterilizer.

[0086] It should be noted that flow-through ultraviolet sterilizers kill bacteria, viruses, and other microorganisms using ultraviolet radiation as water flows through them. Their working principle involves passing water through an internal ultraviolet lamp; the ultraviolet light destroys the DNA structure of microorganisms, thus achieving a sterilization effect.

[0087] Optionally, flow-through UV sterilizers can provide reliable and efficient sterilization in water supply lines. By ensuring that microorganisms in the water are effectively removed, the spread of viruses and bacteria can be prevented, providing a hygienic and safe water supply.

[0088] Optionally, the second filter G2 is the next processing unit after the sterilizer, used for further filtration and purification of pure water, removing suspended solids and other impurities. Referring to the first filter G1, the second filter G2 can also be a microporous filter.

[0089] Optionally, a first water quality detector J1 is installed in the pipe between the second filter G2 and the water supply pipeline outlet to detect the quality of the water supplied by the system to the external water user side (i.e., the quality of the pure water after system treatment), which will help ensure that the quality of the water supply is controllable and meets the expected standards.

[0090] Furthermore, this application embodiment also provides a pure water circulation supply system, the physical structure of which is as described in the above embodiments; the internal control architecture of the pure water circulation supply system can be as follows: Figure 6 As shown, it includes a processor, memory, communication interface, and database connected via a system bus. The processor provides computing and control capabilities. The memory of the pure water circulation supply system includes a non-volatile storage medium and internal memory. The non-volatile storage medium stores the operating system, computer programs, and database. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium. The database of the pure water circulation supply system stores data called by the computer programs. The communication interface of the pure water circulation supply system is used for data communication with external terminals. The input device of the pure water circulation supply system is used to receive signals input from external devices. When the computer program is executed by the processor, it implements a water purification method of the pure water circulation supply system as described in the above embodiment.

[0091] Those skilled in the art will understand that Figure 6 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the pure water circulation supply system to which the present application is applied.

[0092] Furthermore, this application also proposes a computer-readable storage medium comprising a computer program that, when executed by a processor, implements the steps of the water purification method of the pure water circulation supply system as described in the above embodiments. It is understood that the computer-readable storage medium in this embodiment can be a volatile readable storage medium or a non-volatile readable storage medium.

[0093] In summary, the water purification method, the pure water circulation supply system, and the computer-readable storage medium provided in this application embodiment, by controlling the pure water circulation supply system according to the quality of the supplied and returned water, realize the purification treatment of pure water and returned water in the pure water tank, thereby improving the utilization rate of water resources inside and outside the system. It can also further purify water that does not meet the quality standards inside and outside the system and improve the water quality as much as possible without affecting external water use, so as to minimize water discharge and avoid unnecessary waste of water resources. Moreover, the whole process is highly automated, convenient to operate, environmentally friendly and economical.

[0094] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments of the above methods. Any references to memory, storage, databases, or other media used in this application and in the embodiments can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), dual-speed SDRAM (SSRSDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), RAMbus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0095] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, apparatus, article, or method that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, apparatus, article, or method. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, apparatus, article, or method that includes that element.

[0096] The above description is only a preferred embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural changes made based on the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A water purification method for a pure water circulation supply system, characterized in that, The pure water circulation supply system includes an RO water tank, a pure water tank, an EDI module, a water supply pipeline, and a return pipeline. The RO water tank outlet is connected to the EDI module inlet pipe, and a first electric valve is installed in the pipeline. The pure water tank's first outlet is connected to the EDI module inlet pipe, and a second electric valve is installed in the pipeline. The EDI module outlet is connected to the pure water tank inlet pipe. The pure water tank's second outlet is connected to the water supply pipeline inlet, and the water supply pipeline outlet is used to connect to the inlet of the external water user. The return pipeline inlet is used to connect to the outlet of the external water user. The outlet of the return pipe is connected to the inlet of the RO water tank. A branch pipe is also branched into the return pipe, which is connected to the inlet of the pure water tank. A third electric valve is installed in the pipe between the connection point of the return pipe and the branch pipe and the inlet of the RO water tank. A first water quality detector and a second water quality detector are respectively installed in the supply pipe and the return pipe. A first valve is installed in the branch pipe. A second valve is also installed in the pipe between the third electric valve and the outlet of the return pipe. A first drain pipe branches into the pipe between the second valve and the third electric valve. The water purification method of the pure water circulation supply system includes: When the pure water circulation supply system supplies water to the external water user, the supply water quality and return water quality are monitored based on the first water quality detector and the second water quality detector, respectively. When both the supply water quality and the return water quality are found to be substandard, the second electric valve is opened, allowing the water in the pure water tank to be purified by the EDI module. Specifically, if both the supply water quality and the return water quality exceed a first preset threshold, they are deemed substandard. Furthermore, if the return water quality exceeds a third preset threshold, the third electric valve is opened, and the first and second valves are closed, allowing the return water to be discharged through the first drain pipe. If the return water quality is detected to be between the first and third preset thresholds, the third electric valve is opened, and the first valve is closed, allowing the return water to flow into the RO water tank. The third preset threshold is greater than the first preset threshold. When the monitoring detects that the water supply quality is qualified but the return water quality is unqualified, the second electric valve is opened and the first and third electric valves are closed, so that the return water enters the pure water tank through the diversion pipeline, and the water in the pure water tank is purified by the EDI module.

2. The water purification method of the pure water circulation supply system as described in claim 1, characterized in that, The water purification method of the pure water circulation supply system further includes: When the water supply quality is found to be up to standard but the return water quality is found to be substandard, it is necessary to check whether the external water user is in a peak water usage period. If not, then execute the steps of opening the second electric valve, closing the first electric valve and the third electric valve, so that the return water enters the pure water tank through the diversion pipeline, and the water in the pure water tank is purified by the EDI module.

3. The water purification method of the pure water circulation supply system as described in claim 2, characterized in that, The diversion pipeline is equipped with a first valve; after the step of detecting whether the external water user is in a peak water usage period when the water supply quality is qualified but the return water quality is unqualified, the pipeline further includes: If so, then a preset process is performed on the return water; wherein the preset process includes any one of the following: Open the third electric valve and close the first valve to allow return water to flow into the RO water tank; Open the third electric valve and close the first and second valves to allow the return water to be discharged through the first drain pipe.

4. The water purification method of the pure water circulation supply system as described in claim 3, characterized in that, After the step of performing preset treatment on the return water, the method further includes: When the return water quality is retested and found to be up to standard, the third electric valve is closed and the first valve is opened so that the return water flows into the pure water tank through the diversion pipeline.

5. The water purification method of the pure water circulation supply system as described in claim 1, characterized in that, The EDI module also includes a third water quality detector, which is used to detect the quality of the freshwater purified by the EDI module. The water purification method of the pure water circulation supply system further includes: When the quality of the supply water, return water, and fresh water are all found to be substandard, the first and second electric valves are opened to connect the pipeline between the RO water tank and the pure water tank, and to supply water from the RO water tank to the pure water tank.

6. The water purification method of the pure water circulation supply system as described in claim 1, characterized in that, After the step of monitoring the supply water quality and return water quality based on the first water quality detector and the second water quality detector, the method further includes: When the water supply and return water quality are found to be up to standard, the first electric valve is opened, allowing the pure water supplied by the RO water tank to be supplied to the external water user side in sequence through the EDI module, the pure water tank and the water supply pipeline.

7. A pure water circulation supply system, characterized in that, The pure water circulation supply system includes an RO water tank, a pure water tank, an EDI module, a water supply pipeline, and a return pipeline. The RO water tank outlet is connected to the EDI module inlet pipe, and a first electric valve is installed in the pipeline. The pure water tank's first outlet is connected to the EDI module inlet pipe, and a second electric valve is installed in the pipeline. The EDI module outlet is connected to the pure water tank inlet pipe. The pure water tank's second outlet is connected to the water supply pipeline inlet, and the water supply pipeline outlet is used to connect to the inlet of the external water user. The return pipeline inlet is used to connect to the outlet of the external water user. The outlet of the return pipe is connected to the inlet of the RO water tank. A branch pipe is also branched into the return pipe, which is connected to the inlet of the pure water tank. A third electric valve is installed in the pipe between the connection point of the return pipe and the branch pipe and the inlet of the RO water tank. A first water quality detector and a second water quality detector are respectively installed in the supply pipe and the return pipe. A first valve is installed in the branch pipe. A second valve is also installed in the pipe between the third electric valve and the outlet of the return pipe. A first drain pipe branches into the pipe between the second valve and the third electric valve. The pure water circulation supply system further includes a memory, a processor, and a computer program stored in the memory and running on the processor. When the computer program is executed by the processor, it implements the steps of the water purification method of the pure water circulation supply system as described in any one of claims 1 to 6.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the steps of the water purification method of the pure water circulation supply system as described in any one of claims 1 to 6.

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