Water quality treatment device and carbon dioxide gas-liquid phase change energy storage system

Abstract

The water quality treatment device and the carbon dioxide energy storage system belong to the field of carbon dioxide energy storage. The water quality treatment device comprises a first pipeline, a second pipeline, a magnetic adsorption structure, a filtering structure and a drain pipe. The first pipeline has a first water inlet end and a first water outlet end. The second pipeline has a second water inlet end and a second water outlet end, and the second water inlet end is communicated with the first pipeline. The magnetic adsorption structure is at least partially located in the first pipeline and opposite to the second water inlet end, and is used for adsorbing metal impurities in water. The filtering structure is located in the second pipeline. One end of the drain pipe is communicated with the second pipeline, and the connection is located between the filtering structure and the second water inlet end. By arranging the magnetic adsorption structure in the first pipeline, the magnetic adsorption structure will hinder the water to a certain extent and adsorb the iron filings in the water, so that the iron filings in the water are removed. The filtering structure is arranged in the second pipeline, and the water flowing through the second pipeline is filtered to remove impurities that are not adsorbed by the magnetic adsorption structure.

Description

Technical Field

[0001] This disclosure relates to the field of carbon dioxide energy storage, and in particular to a water treatment device and a carbon dioxide energy storage system. Background Technology

[0002] With the development of industrialization, carbon dioxide emissions have surged, and climate change caused by the greenhouse effect has posed a serious threat. Carbon dioxide energy storage systems can not only utilize carbon dioxide for energy storage, but also reduce carbon dioxide emissions and mitigate the greenhouse effect.

[0003] In carbon dioxide gas-liquid phase change energy storage systems, pipeline flushing (purging) is crucial. If impurities in the pipelines enter the heat exchanger, it can affect the design performance of the heat exchanger and other equipment, or even paralyze the entire system. These impurities may be sand, gravel, iron filings, etc., inherent in the water within the pipeline, or they may be due to inadequate pipeline flushing (purging) resulting in welding slag or iron filings from corrosion. Existing pipeline flushing (purging) schemes use existing filters. Since pipeline resistance is a critical design parameter, the filter pores are not very small. Existing filters can only filter relatively large objects and are ineffective against smaller objects (such as iron filings the size of sand grains). Furthermore, filter disassembly is cumbersome. If these impurities accumulate in the pipeline over a long period, they will negatively impact the heat exchange efficiency of the carbon dioxide gas-liquid phase change energy storage system.

[0004] In addition, calcium and magnesium ions in the pipeline water of the carbon dioxide gas-liquid phase change energy storage system are prone to forming scale, which will also affect the heat exchange effect of the carbon dioxide gas-liquid phase change energy storage system. Summary of the Invention

[0005] To address at least one of the aforementioned technical problems, this disclosure provides a water treatment device and a carbon dioxide energy storage system, which can reduce impurities in pipeline systems. The technical solution is as follows:

[0006] In a first aspect, embodiments of this disclosure provide a water treatment device, the water treatment device comprising:

[0007] The first pipe has a first inlet end and a first outlet end;

[0008] The second pipe has a second inlet and a second outlet, and the second inlet is connected to the first pipe.

[0009] A magnetic adsorption structure, at least partially located in the first pipe and opposite to the second water inlet, is used to adsorb metallic impurities in the water.

[0010] A filter structure, located in the second pipe, is used to filter impurities in the water;

[0011] The drain pipe has one end connected to the second pipe, and the connection point is located between the filter structure and the second water inlet.

[0012] Optionally, the magnetic adsorption structure includes a non-magnetic outer shell and an electromagnet, the electromagnet being located in the non-magnetic outer shell and detachably connected to the non-magnetic outer shell, the non-magnetic outer shell being connected to the first pipe, the non-magnetic outer shell being at least partially located inside the first pipe, such that the electromagnet is at least partially located inside the first pipe, and the lower end of the non-magnetic outer shell extending beyond the lower wall of the first pipe.

[0013] Optionally, the first pipe has a mounting hole on its wall, and the non-magnetic outer shell is at least partially inserted into the first pipe through the mounting hole, with the non-magnetic outer shell being sealed to the wall of the mounting hole.

[0014] Optionally, it also includes a tapered tube that connects the second water inlet and the first pipe. The larger diameter end of the tapered tube is connected to the first pipe and is opposite to the end of the non-magnetic outer shell. The diameter of the larger diameter end of the tapered tube is greater than the diameter of the non-magnetic outer shell.

[0015] Optionally, the tapered tube and the non-magnetic outer shell are arranged coaxially.

[0016] Optionally, the filter structure includes a filter screen and a differential pressure sensor, wherein the two pressure detection ports of the differential pressure sensor are located on opposite sides of the filter screen.

[0017] Optionally, both the second inlet and the second outlet are connected to the first pipe, with the second inlet close to the first outlet and the second outlet close to the first inlet. The water treatment device further includes a one-way valve and a circulation pump. The one-way valve is connected in series on the second pipe and is located between the second outlet and the filter structure. The circulation pump is located between the one-way valve and the filter structure.

[0018] Optionally, the water treatment device further includes an anti-scaling tank connected in series on the second pipeline and located between the circulation pump and the filter structure, the anti-scaling tank being used to inject pressurized gaseous carbon dioxide.

[0019] Optionally, the water treatment device further includes a water quality detector, the detection head of which is located inside the first pipe and between the magnetic adsorption structure and the first water outlet.

[0020] Secondly, embodiments of this disclosure also provide a water treatment apparatus, comprising:

[0021] The first pipe has a first inlet end and a first outlet end;

[0022] The second pipe has a second inlet and a second outlet, both of which are connected to the first pipe, and the second inlet is close to the first outlet and the second outlet is close to the first inlet.

[0023] An anti-scaling tank is connected in series with the second pipeline, and the anti-scaling tank is used to inject pressurized gaseous carbon dioxide.

[0024] Thirdly, embodiments of this disclosure also provide a carbon dioxide energy storage system, which includes any of the water treatment devices described in the first aspect.

[0025] The beneficial effects of the technical solutions provided in this disclosure include at least one of the following:

[0026] (1) By connecting a second pipe to the side wall of the first pipe, water in the first pipe can enter the second pipe from the second inlet end of the second pipe. By setting a magnetic adsorption structure in the first pipe, with the magnetic adsorption structure facing the second inlet end of the second pipe, the magnetic adsorption structure will create a certain obstruction to the water before the water enters the second pipe, and adsorb iron filings in the water, thus removing the iron filings from the water.

[0027] (2) By installing a filter structure in the second pipe, the water flowing through the second pipe is filtered to remove impurities that are not adsorbed by the magnetic adsorption structure. A drain pipe is then connected to the second pipe, with the connection point between the drain pipe and the second pipe located between the filter structure and the second inlet end of the second pipe. This allows the drain pipe to be opened after the filter structure has filtered out a certain amount of impurities, enabling the impurities to be discharged through the drain pipe by the water flow. This results in less impurity in the water discharged from the first outlet end of the first pipe.

[0028] (3) It not only has a good capture and filtration effect on large particles, but also a good capture and filtration effect on small objects. It has little impact on the operation of the energy storage system during water treatment. It can capture and filter large, medium and small (light and heavy) objects without increasing the local resistance of the pipeline.

[0029] (4) Inject pressurized gaseous carbon dioxide into the anti-scaling tank so that calcium and magnesium ions in the water are always in a free state in neutral, acidic and alkaline environments, and will not form scale. No softening treatment is required. When applied to carbon dioxide energy storage system, the heat exchanger does not need to be shut down to clean the scale, ensuring the heat exchange effect of the heat exchanger.

[0030] (5) The water treatment device is made to match the standard flange connection size. The installation of the water treatment device is completed by disassembling a certain valve, without occupying the space of the water pipeline (system). Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the structure of a water treatment device provided in an embodiment of this disclosure;

[0033] Figure 2 yes Figure 1 Enlarged diagram of point A in the diagram;

[0034] Figure 3 This is a schematic diagram of the installation of a magnetic adsorption structure provided in an embodiment of this disclosure;

[0035] Figure 4 This is another structural schematic diagram of a water treatment device provided in an embodiment of this disclosure;

[0036] Figure 5 This is a partial structural schematic diagram of a water treatment device provided in an embodiment of this disclosure;

[0037] Figure 6 This is a partial structural schematic diagram of a water treatment device provided in an embodiment of this disclosure;

[0038] Figure 7 This is another structural schematic diagram of a water treatment device provided in an embodiment of this disclosure;

[0039] Figure 8 This is another structural schematic diagram of a water treatment device provided in an embodiment of this disclosure;

[0040] Figure 9 This is another structural schematic diagram of a water treatment device provided in an embodiment of this disclosure;

[0041] Figure 10 This is another structural schematic diagram of a water treatment device provided in an embodiment of this disclosure;

[0042] Figure 11 This is another structural schematic diagram of a water treatment device provided in an embodiment of this disclosure;

[0043] Figure 12 This is another structural schematic diagram of a water treatment device provided in an embodiment of this disclosure;

[0044] Figure 13 This is another structural schematic diagram of a water treatment device provided in an embodiment of this disclosure;

[0045] Figure 14 This is another structural schematic diagram of a water treatment device provided in an embodiment of this disclosure. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of this disclosure clearer, the embodiments of this disclosure will be described in further detail below with reference to the accompanying drawings.

[0047] Figure 1 This is a schematic diagram of the structure of a water treatment device provided in an embodiment of this disclosure. Figure 1 As shown, Figure 1 The arrows in the diagram schematically indicate the direction of water flow. For example... Figure 1 As shown, the water treatment device includes a first pipe 10, a second pipe 20, a magnetic adsorption structure 40, a filter structure 50, and a drain pipe 60.

[0048] The first pipe 10 has a first inlet and a first outlet. The second pipe 20 has a second inlet and a second outlet, with the second inlet connected to the first pipe 10.

[0049] The magnetic adsorption structure 40 is at least partially located in the first pipe 10 and opposite to the second water inlet. The magnetic adsorption structure 40 is used to adsorb magnetic impurities such as metallic impurities in the water. The filter structure 50 is located in the second pipe 20 and is used to filter impurities in the water. These impurities include at least large, medium, and small (light and heavy) objects, such as pebbles and sand. One end of the drain pipe 60 is connected to the second pipe 20, and the connection point is located between the filter structure 50 and the second water inlet.

[0050] As an example, the second water inlet is located below the first pipe 10. Water containing large, medium and small (light and heavy) particles is blocked by the magnetic adsorption structure 40 and flows into the second pipe 20 through the second water inlet under its own weight.

[0051] By connecting a second pipe 20 to the side wall of the first pipe 10, water in the first pipe 10 can enter the second pipe 20 from its second inlet end. A magnetic adsorption structure 40 is installed in the first pipe 10, facing the second inlet end of the second pipe 20. Before the water enters the second pipe 20, the magnetic adsorption structure 40 obstructs the flow and adsorbs magnetic impurities such as iron filings, removing these impurities. After the water containing large, medium, and small (light and heavy) particles (with magnetic impurities removed) flows into the second pipe 20, it is blocked by the magnetic adsorption structure 40. A filter structure 50 is then installed in the second pipe 20 to filter out the large particles and remove impurities not adsorbed by the magnetic adsorption structure 40.

[0052] By connecting a drain pipe 60 to the second pipe 20, with the connection point between the drain pipe 60 and the second pipe 20 located between the filter structure 50 and the second inlet of the second pipe 20, the drain pipe 60 can be opened after the filter structure 50 has filtered out certain impurities, allowing the impurities to be discharged through the drain pipe 60 under the influence of the water flow. This capture and filtration of large, medium, and small (light and heavy) particles in the water within the first pipe 10 ensures that the water discharged from the first outlet meets water quality requirements and is suitable for use in a carbon dioxide gas-liquid phase change energy storage system without affecting the long-term heat exchange performance of the energy storage system.

[0053] like Figure 1 As shown, between the second inlet end of the filter structure 50 and the second pipe 20, the second pipe 20 is located near the filter structure 50. The lower part of a portion of the pipe wall of the second pipe 20 is inclined. The drain pipe 60 is connected to the lowest position of the inclined pipe wall. The inclined pipe wall is conducive to the accumulation of large, medium and small (light and heavy) impurities near the connection between the drain pipe 60 and the second pipe 20.

[0054] Figure 2 yes Figure 1 An enlarged diagram of point A in the image. (See image for example.) Figure 2 As shown, the magnetic adsorption structure 40 includes a non-magnetic outer shell 401 and an electromagnet 402. The electromagnet 402 is located inside the non-magnetic outer shell 401 and is detachably connected to it. The non-magnetic outer shell 401 is connected to the first pipe 10, and at least partially, it is located inside the first pipe 10, so that the electromagnet 402 is at least partially located inside the first pipe 10. The lower end of the non-magnetic outer shell 401 extends beyond the lower wall of the first pipe 10. Specifically, the upper end of the non-magnetic outer shell 401 can contact the inner wall of the first pipe 10, so that the entire non-magnetic outer shell 401 is located inside the first pipe 10, and the entire electromagnet 402 is located inside the first pipe 10. Alternatively, the upper end of the non-magnetic outer shell 401 can also extend through the inner wall of the first pipe 10, so that the non-magnetic outer shell 401 is partially located inside the first pipe 10, and the electromagnet 402 is partially located inside the first pipe 10.

[0055] A non-magnetic outer shell 401 is installed on the first pipe 10, housing an electromagnet 402. When the electromagnet 402 is energized, a magnetic field is formed within the first pipe 10. As water flows through the first pipe 10, it passes around the non-magnetic outer shell 401. Impurities in the water, such as rust, that can be attracted by the electromagnet 402 are attracted to the surface of the non-magnetic outer shell 401 and accumulate there, preventing them from flowing further with the water. The left and right sides of the non-magnetic outer shell 401 have very small gaps between them and the inner wall of the first pipe 10, smaller than the diameter of a sand grain, allowing water to flow only from the left and right sides. The lower end of the non-magnetic outer shell 401 extends beyond the lower wall of the first pipe 10, entering the second water inlet, facilitating the entry of water containing impurities not attracted by the magnetic adsorption structure 40 into the second water inlet along the non-magnetic outer shell 401. The diameter of the second inlet pipe is larger than that of large particles. Water containing large, medium and small (light and heavy) particles is blocked by the magnetic adsorption structure 40 and enters the second pipe 20 for filtration under its own weight.

[0056] Furthermore, due to the isolation effect of the non-magnetic outer shell 401, the electromagnet 402 can be maintained more conveniently, such as repaired or replaced, without having to shut off the water flow in the first pipe 10, thus not affecting the normal operation of the energy storage system.

[0057] The non-magnetic outer shell 401 can be a tubular structure made of metallic or non-metallic materials. The tubular structure can be closed at one end and open at the other end, or both ends can be closed. When the non-magnetic outer shell 401 is made of metallic materials, it can be a metal that cannot be magnetized by a magnet, such as aluminum alloy or copper alloy.

[0058] In some examples, the non-magnetic shell 401 can be cylindrical, conical, or irregularly shaped.

[0059] Figure 3 This is a schematic diagram of the installation of a magnetic adsorption structure provided in an embodiment of this disclosure. Figure 3 As shown, the first pipe 10 has a mounting hole 10a on its wall, and the non-magnetic outer shell 401 is at least partially inserted into the first pipe 10 through the mounting hole 10a. The non-magnetic outer shell 401 is sealed to the wall of the mounting hole 10a.

[0060] By providing an installation hole 10a in the wall of the first pipe 10, the non-magnetic housing 401 is at least partially inserted into the first pipe 10 through the installation hole 10a, thereby sealing the non-magnetic housing 401 with the wall of the installation hole 10a to prevent leakage. Exemplarily, the seal between the non-magnetic housing 401 and the wall of the installation hole 10a can be achieved by welding or by using a sealing ring.

[0061] Figure 4 This is another structural schematic diagram of a water treatment device provided in an embodiment of this disclosure. For example... Figure 4 As shown, the water treatment device also includes a conical tube 201, which connects the second water inlet and the first pipe 10. The larger diameter end of the conical tube 201 is connected to the first pipe 10 and is opposite to the end of the non-magnetic outer shell 401. The diameter of the larger diameter end of the conical tube 201 is larger than the diameter of the non-magnetic outer shell 401.

[0062] The lower end of the non-magnetic outer shell 401 extends beyond the lower wall of the first pipe 10 and enters the conical tube 201, facilitating the flow of water containing impurities not adsorbed by the magnetic adsorption structure 40 into the conical tube 201. The conical tube 201 is funnel-shaped, with the larger diameter end facing the magnetic adsorption structure 40. At the conical tube 201, the water flow forms a vortex under the influence of gravity and Earth's gravitational pull. Impurities in the water are more easily drawn into the second pipe 20 by the vortex and then filtered out by the filter structure 50 within the second pipe 20.

[0063] As an example, the two ends of the tapered tube 201 can be welded to the first pipe 10 and the second pipe 20, respectively.

[0064] Optionally, the tapered tube 201 is located directly below the magnetic adsorption structure 40.

[0065] The conical tube 201 is positioned directly below the magnetic adsorption structure 40. After the magnetic adsorption structure 40 adsorbs a large amount of impurities such as rust, the electromagnet 402 can be de-energized, allowing the impurities adsorbed on the surface of the non-magnetic shell 401 to fall into the conical tube 201, be blocked by the filter structure 50, and finally be discharged through the drain pipe 60.

[0066] Figure 5 This is a partial structural schematic diagram of a water treatment device provided in an embodiment of this disclosure. Figure 5 As shown, in this example, the tapered tube 201 and the non-magnetic outer shell 401 are arranged coaxially. This makes it easier for impurities to enter the tapered tube 201.

[0067] Figure 6 This is a partial structural schematic diagram of a water treatment device provided in an embodiment of this disclosure. Figure 6 As shown, the filter structure 50 includes a filter screen 501 and a differential pressure sensor 502. The two pressure detection ports of the differential pressure sensor 502 are located on opposite sides of the filter screen 501.

[0068] By setting a differential pressure sensor 502 and arranging its two pressure detection ports on opposite sides of the filter screen 501, the differential pressure sensor 502 can detect the pressure difference between the two sides of the filter screen 501.

[0069] Filter screen 501 removes impurities from the water. As impurities accumulate on the side of filter screen 501 closest to the conical tube 201, the pressure on that side increases, leading to a greater pressure difference between the two sides of filter screen 501. Since differential pressure sensor 502 can detect this pressure difference, the degree of impurity accumulation at filter screen 501 can be determined based on its detection results. When the pressure difference reaches a certain level, indicating that impurities have accumulated to a certain extent, drain pipe 60 is opened, allowing the accumulated impurities at filter screen 501 to be discharged through the drain pipe 60 by the water flow.

[0070] like Figure 6 As shown, a drain valve 70 can be connected to the end of the drain pipe 60 away from the first pipe 20. By opening the drain valve 70, the drain pipe 60 can be opened.

[0071] Figure 7 This is another structural schematic diagram of a water treatment device provided in an embodiment of this disclosure. For example... Figure 7 As shown, compared to Figure 4 In the water treatment device shown in this example, both the second inlet and the second outlet of the second pipe 20 are connected to the first pipe 10, with the second inlet close to the first outlet and the second outlet close to the first inlet. Furthermore, in this example, the water treatment device also includes a one-way valve 202 and a circulation pump 30. The one-way valve 202 is connected in series with the second pipe 20 and is located between the second outlet and the filter structure 50, while the circulation pump 30 is located between the one-way valve 202 and the filter structure 50.

[0072] By connecting a circulation pump 30 in series with the second pipe 20, since the second inlet of the second pipe 20 is close to the first outlet of the first pipe 10 and the second outlet of the second pipe 20 is close to the first inlet of the first pipe 10, the water in the first pipe 10 can enter from the second inlet of the second pipe 20 under the action of the circulation pump 30 before flowing out from the first outlet of the first pipe 10, and then return to the first pipe 10 from the second outlet of the second pipe 20. Through multiple circulations between the second pipe 20 and the first pipe 10, impurities in the water can be further reduced, and the water quality of the water discharged from the first outlet of the first pipe 10 can be improved.

[0073] Figure 8 This is another structural schematic diagram of a water treatment device provided in an embodiment of this disclosure. For example... Figure 8 As shown, compared to Figure 7The water treatment device shown in this example also includes an anti-scaling tank 203. The anti-scaling tank 203 is connected in series with the second pipe 20 and is located between the circulating pump 30 and the filter structure 50. The anti-scaling tank 203 is used to inject pressurized gaseous carbon dioxide, so that calcium ions and magnesium ions in the water are always in a free state in neutral, acidic and alkaline environments, and will not form scale. No softening treatment is required. When applied to a carbon dioxide energy storage system, the heat exchanger does not need to be shut down to clean the scale, thus ensuring the heat exchange effect of the heat exchanger.

[0074] By setting up an anti-scaling tank 203, the water flowing through the second pipe 20 can be acid-washed, and the acid-washed water can be free from scaling during water recycling.

[0075] Figure 9 This is a schematic diagram of the structure of a water treatment device provided in an embodiment of this disclosure. Figure 9 As shown, compared to Figure 8 The water treatment device shown in this example also includes a water quality detector 103, the detection head of which is located inside the first pipe 10 and between the magnetic adsorption structure 40 and the first water outlet.

[0076] For example, the water quality analyzer 103 is an instrument for detecting insoluble impurities in water.

[0077] By installing a water quality detector 103 on the first pipe 10, the water quality in the first pipe 10 is detected by the water quality detector 103. When the water quality in the first pipe 10 is unqualified, such as when the impurity content in the water is too high, the circulation pump 30 is turned on to make the water circulate and filter in the first pipe 10 and the second pipe 20 to reduce the impurities in the water.

[0078] Figure 10 This is another structural schematic diagram of a water treatment device provided in an embodiment of this disclosure. Figure 10 The arrows in the diagram schematically indicate the direction of water flow. For example... Figure 10 As shown, the water treatment device includes a first pipe 10, a second pipe 20, a circulation pump 30, a magnetic adsorption structure 40, a filter structure 50, a drain pipe 60, and a drain valve 70.

[0079] The first pipe 10 has a first inlet and a first outlet. The second pipe 20 has a second inlet and a second outlet, both of which are connected to the first pipe 10, with the second inlet close to the first outlet and the second outlet close to the first inlet.

[0080] A circulation pump 30 is connected in series with the second pipe 20. A magnetic adsorption structure 40 is located in the first pipe 10 and is opposite to the second water inlet. A filter structure 50 is located in the second pipe 20. One end of a drain pipe 60 is connected to the second pipe 20, and the connection point is located between the filter structure 50 and the second water inlet; a drain valve 70 is connected to the other end of the drain pipe 60.

[0081] like Figure 10 As shown, flanges 101 are connected to both ends of the first pipe 10. The flanges 101 facilitate the connection of the first pipe 10 to other pipes in the water circulation system.

[0082] For example, flange 101 can be bolted to flange 101 of other pipes. A sealing ring can be sandwiched between flanges 101 to improve sealing and prevent water leakage at the connection.

[0083] In this embodiment of the disclosure, the second pipe 20 may include multiple pipe segments, and being connected in series on the second pipe 20 means being connected between two adjacent pipe segments. For example, the circulation pump 30 being connected in series on the second pipe 20 means that the inlet of the circulation pump 30 is connected to one end of one of the two adjacent pipe segments, and the outlet of the circulation pump 30 is connected to one end of the other of the two adjacent pipe segments.

[0084] By connecting a second pipe 20 to the first pipe 10, and a circulation pump 30 connected in series on the second pipe 20, since the second inlet of the second pipe 20 is close to the first outlet of the first pipe 10 and the second outlet of the second pipe 20 is close to the first inlet of the first pipe 10, the water in the first pipe 10 can enter from the second inlet of the second pipe 20 under the action of the circulation pump 30 before flowing out from the first outlet of the first pipe 10, and then return to the first pipe 10 from the second outlet of the second pipe 20 for the next round of circulation.

[0085] By setting a magnetic adsorption structure 40 in the first pipe 10, which is opposite to the second water inlet end of the second pipe 20, the magnetic adsorption structure 40 will obstruct the water before it enters the second pipe 20 and adsorb iron filings in the water, thus removing the iron filings. By setting a filter structure 50 in the second pipe 20, the water flowing through the second pipe 20 is filtered to remove impurities that are not adsorbed by the magnetic adsorption structure 40.

[0086] By connecting a drain pipe 60 to the second pipe 20, and a drain valve 70 to the drain pipe 60, with the connection point between the drain pipe 60 and the second pipe 20 located between the filter structure 50 and the second inlet of the second pipe 20, the drain valve 70 can be opened after the filter structure 50 has filtered out a certain amount of impurities, allowing the impurities to be discharged through the drain pipe 60 under the influence of the water flow. By circulating the water multiple times between the first pipe 10 and the second pipe 20, the impurities in the water are significantly reduced, which helps improve water quality.

[0087] like Figure 10 As shown, the first pipe 10 has a mounting hole 10a on its wall, which is opposite to the second water inlet end. For example, the upper end of the wall of the first pipe 10 has the mounting hole 10a. The magnetic adsorption structure 40 includes a non-magnetic housing 401 and an electromagnet 402. The non-magnetic housing 401 is inserted into the mounting hole 10a and is sealed to the wall of the first pipe 10. The electromagnet 402 is located within the non-magnetic housing 401.

[0088] By providing mounting holes 10a on the wall of the first pipe 10, the non-magnetic outer shell 401 is at least partially inserted into the first pipe 10 through the mounting holes 10a, thereby forming a cavity inside the first pipe 10 to accommodate the electromagnet 402 and enable the electromagnet 402 to generate a magnetic field inside the first pipe 10 after being energized. When water flows through the first pipe 10, it flows around the non-magnetic outer shell 401. Impurities such as rust in the water that can be attracted by the electromagnet 402 are attracted to the surface of the non-magnetic outer shell 401 and accumulate on the surface of the non-magnetic outer shell 401, instead of continuing to move forward with the water flow. There are gaps between the front and rear sides of the non-magnetic outer shell 401 and the inner wall of the first pipe 10. These gaps are very small, smaller than the diameter of a sand grain, allowing water to flow through only the front and rear sides of the non-magnetic outer shell 401. The diameter of the second water inlet is larger than the diameter of large particles. Water containing large, medium, and small (light and heavy) particles is blocked by the magnetic adsorption structure 40 and enters the second pipe 20 for filtration under its own weight.

[0089] Furthermore, due to the isolation effect of the non-magnetic outer shell 401, the electromagnet 402 can be maintained more conveniently, such as repaired or replaced, without having to shut off the water flow in the first pipe 10, thus not affecting the normal operation of the energy storage system.

[0090] like Figure 10 As shown, the water treatment device also includes a conical tube 201, which connects the second water inlet and the first pipe 10. The larger diameter end of the conical tube 201 is connected to the first pipe 10 and is opposite to the end of the non-magnetic outer shell 401. The diameter of the larger diameter end of the conical tube 201 is larger than the diameter of the non-magnetic outer shell 401.

[0091] The conical tube 201 is funnel-shaped, with the larger diameter end facing the magnetic adsorption structure 40. At the conical tube 201, the water flow forms a vortex under the action of gravity and the Earth's gravitational pull. Impurities in the water are more easily drawn into the second pipe 20 by the vortex and then filtered out by the filter structure 50 in the second pipe 20.

[0092] In some examples, the drain valve 70 can be an electrically controlled valve, such as a solenoid valve. The water treatment device may also include a controller electrically connected to both the drain valve 70 and the differential pressure sensor 502. The controller is used to open the drain valve 70 when the differential pressure sensor 502 detects that the pressure difference across the filter screen 501 has reached a preset value.

[0093] The preset value can be set according to specific requirements so that impurities can be discharged from the second pipe 20 in a timely manner without opening the drain valve 70 too frequently.

[0094] Optionally, the controller can also be electrically connected to the circulating pump 30 to control the start and stop of the circulating pump 30.

[0095] like Figure 10 As shown, the drain pipe 60 can be located directly below the second pipe 20, which is more conducive to the discharge of impurities from the drain pipe 60 under the action of water flow.

[0096] like Figure 10 As shown, the water treatment device also includes a one-way valve 202. The one-way valve 202 is connected in series on the second pipe 20. The one-way valve 202 is located between the second outlet end of the second pipe 20 and the filter structure 50, and the circulation pump 30 is located between the one-way valve 202 and the filter structure 50.

[0097] By setting a one-way valve 202, water in the second pipe 20 can only flow from the second inlet end through the filter structure 50 to the second outlet end of the second pipe 20, thus preventing water in the first pipe 10 from flowing into the second pipe 20 from the second outlet end under pressure, passing through the filter structure 50 to the second inlet end and entering the first outlet end.

[0098] In this example, by placing the circulation pump 30 between the check valve 202 and the filter structure 50, that is, at the inlet end of the check valve 202, it is also possible to avoid damage to the circulation pump 30 when the water pressure at the second outlet end of the second pipe 20 is too high.

[0099] like Figure 10 As shown, the water treatment device also includes an anti-scaling tank 203. The anti-scaling tank 203 is connected in series with the second pipe 20 and is located between the circulation pump 30 and the filter structure 50. A carbon dioxide injection pipe 2031 is connected to the tank wall of the anti-scaling tank 203.

[0100] Water bodies generally contain certain amounts of metal ions such as calcium and magnesium, which are prone to scaling and may affect the normal operation of the heat exchanger in the carbon dioxide energy storage system.

[0101] In this embodiment, an anti-scaling tank 203 is connected in series in the second pipeline 20, and a carbon dioxide injection pipe 2031 is connected to the tank wall of the anti-scaling tank 203. When water circulates in the second pipeline 20, it flows through the anti-scaling tank 203. Carbon dioxide gas is injected into the water in the anti-scaling tank 203 through the carbon dioxide injection pipe 2031, causing the carbon dioxide to dissolve in the water. This ensures that calcium and magnesium ions in the water remain in a free state under neutral, acidic, and alkaline environments, preventing scaling and eliminating the need for softening treatment. Depending on the concentration of calcium and magnesium ions in the water, pressurized carbon dioxide can be injected into the water in the anti-scaling tank 203 through the carbon dioxide injection pipe 2031. The carbon dioxide injection pressure cannot exceed the pressure of the water pipeline (system) and must be at least atmospheric pressure to control the concentration of bicarbonate formation. Under pressure, carbon dioxide dissolves in the water to form bicarbonate. Calcium and magnesium ions in the circulating water system combine with bicarbonate to form calcium bicarbonate and magnesium bicarbonate. This ensures that calcium and magnesium ions in the water remain in a free state in neutral, acidic, and alkaline environments, preventing scale formation and eliminating the need for softening treatment. When applied to carbon dioxide energy storage systems, the heat exchanger does not require shutdown for scale removal, thus guaranteeing its heat exchange efficiency.

[0102] like Figure 10 As shown, the water treatment device also includes an overpressure relief valve 2032. The overpressure relief valve 2032 is connected to the top of the anti-scaling tank 203.

[0103] The overpressure relief valve 2032 serves to improve safety. When the pressure inside the anti-scaling tank 203 becomes too high, exceeding the preset pressure value, the overpressure relief valve 2032 opens, releasing excess carbon dioxide gas inside the anti-scaling tank 203 and reducing the pressure inside the anti-scaling tank 203.

[0104] The pressure threshold for the overpressure relief valve 2032 to be activated can be set according to the pressure resistance of the anti-scaling tank 203 to ensure the safety of the water treatment device.

[0105] like Figure 10 As shown, the water treatment device also includes a water quality detector 103. The detection head of the water quality detector 103 is located inside the first pipe 10, and the detection head of the water quality detector 103 is located between the magnetic adsorption structure 40 and the first water outlet end of the first pipe 10.

[0106] Optionally, the water quality analyzer 103 can be electrically connected to the aforementioned controller, which controls the circulation pump 30 based on the detection results of the water quality analyzer 103. For example, when the water quality analyzer 103 detects that the water quality is unqualified, the controller controls the circulation pump 30 to start; when the water quality analyzer 103 detects that the water quality is qualified, the controller controls the circulation pump 30 to stop.

[0107] like Figure 10 As shown, in this example, the water treatment device also includes a switching valve 102, which is connected in series in the first pipe 10 and is located between the magnetic adsorption structure 40 and the first outlet. The detection head of the water quality analyzer 103 is located between the magnetic adsorption structure 40 and the switching valve 102.

[0108] By setting the switch valve 102, the water flow in the first pipe 10 can be controlled. When the water quality analyzer 103 detects that the water quality in the first pipe 10 is substandard, for example, if the impurity content in the water is too high, the switch valve 102 can be closed to prevent the substandard water from continuing to flow into subsequent pipes. Then, the circulation pump 30 is turned on to circulate the water in the first pipe 10 and the second pipe 20, reducing the impurities in the water. Once the water quality in the first pipe 10 is acceptable, the switch valve 102 is reopened to allow the water to flow into subsequent pipes.

[0109] Optionally, both the switching valve 102 and the water quality analyzer 103 can be electrically connected to the aforementioned controller, and the controller controls the switching valve 102 based on the detection results of the water quality analyzer 103. For example, when the water quality analyzer 103 detects that the water quality is unqualified, the controller controls the switching valve 102 to close; when the water quality analyzer 103 detects that the water quality is qualified, the controller controls the switching valve 102 to open.

[0110] Figure 11 This is a schematic diagram of the structure of a water treatment device provided in an embodiment of this disclosure. Figure 11 As shown, the water treatment device includes a first pipe 10, a second pipe 20, and an anti-scaling tank 203.

[0111] The first pipe 10 has a first inlet and a first outlet. The second pipe 20 has a second inlet and a second outlet, both of which are connected to the first pipe 10, with the second inlet closer to the first outlet and the second outlet closer to the first inlet. An anti-scaling tank 203 is connected in series with the second pipe 20, and pressurized carbon dioxide gas is injected into the anti-scaling tank 203 to prevent scaling.

[0112] By setting up the anti-scaling tank 203, calcium and magnesium ions in the water flowing through the second pipe 20 can be prevented from forming scale. Calcium and magnesium ions in the water are always in a free state under neutral, acidic, and alkaline environments. Carbon dioxide dissolves in the water under pressure to form bicarbonate ions. Calcium and magnesium ions in the circulating water system combine with bicarbonate ions to form calcium bicarbonate and magnesium bicarbonate. Water containing calcium bicarbonate and magnesium bicarbonate is returned to the first pipe 10.

[0113] Figure 12 This is another structural schematic diagram of a water treatment device provided in an embodiment of this disclosure. For example... Figure 12 As shown, compared to Figure 11 The water treatment device shown in this example further includes a filter structure 50 and a drain pipe 60. The filter structure 50 is located in the second pipe 20 and is used to filter impurities in the water. One end of the drain pipe 60 is connected to the second pipe 20, and the connection point is located between the filter structure 50 and the second water inlet.

[0114] In this embodiment, when the water circulates in the second pipe 20, it flows through the anti-scaling tank 203. The anti-scaling tank 203 is used to inject pressurized gaseous carbon dioxide, so that calcium and magnesium ions in the water are always in a free state in neutral, acidic and alkaline environments, and will not form scale. Therefore, softening treatment is not required. When applied to a carbon dioxide energy storage system, the heat exchanger does not need to be shut down for scale removal, ensuring the heat exchanger's heat exchange efficiency.

[0115] In some examples, refer to Figure 12 As shown, the water treatment device also includes a one-way valve 202 and a circulation pump 30. The one-way valve 202 is connected in series on the second pipe 20 and is located between the second outlet and the filter structure 50. The circulation pump 30 is located between the one-way valve 202 and the filter structure 50. The functions of the one-way valve 202 and the circulation pump 30 have been described above and will not be repeated here.

[0116] A drain valve 70 can be connected to the end of the drain pipe 60 away from the first pipe 20. By opening the drain valve 70, the drain pipe 60 can be opened to discharge impurities.

[0117] The structure of the anti-scaling tank 203 in this example can be similar to... Figure 10 The anti-scaling tank 203 has the same structure. A carbon dioxide injection pipe can also be connected to the tank wall of the anti-scaling tank 203 to inject pressurized gaseous carbon dioxide into the anti-scaling tank 203. This ensures that calcium and magnesium ions in the water remain in a free state under neutral, acidic, and alkaline environments, preventing scaling and eliminating the need for softening treatment. When applied to a carbon dioxide energy storage system, the heat exchanger does not need to be shut down for scale removal, ensuring the heat exchanger's heat exchange efficiency.

[0118] Figure 13This is another structural schematic diagram of a water treatment device provided in an embodiment of this disclosure. For example... Figure 13 As shown, compared to Figure 12 The water treatment device shown in this example also includes a water quality detector 103. The detection head of the water quality detector 103 is located inside the first pipe 10 and between the magnetic adsorption structure 40 and the first water outlet.

[0119] For example, the water quality analyzer 103 is an instrument for detecting insoluble impurities in water.

[0120] By installing a water quality detector 103 on the first pipe 10, the water quality in the first pipe 10 is detected by the water quality detector 103. When the water quality in the first pipe 10 is unqualified, such as when the impurity content in the water is too high, the water is circulated into the second pipe 20 and the first pipe 10 to reduce the impurities in the water and prevent scaling.

[0121] In some examples, Figure 13 Based on the illustrated embodiment, a switching valve (not shown) is also included, which is connected in series in the first pipe 10 and located between the second inlet and the first outlet. The detection head of the water quality analyzer 103 is located between the second inlet and the switching valve.

[0122] By setting a switch valve, the water flow in the first pipe 10 can be controlled. When the water quality analyzer 103 detects that the water quality in the first pipe 10 is substandard, such as when the impurity content in the water is too high, the switch valve can be closed to prevent the substandard water from continuing to flow into subsequent pipes. Then, the circulation pump 30 is turned on to circulate the water in the first pipe 10 and the second pipe 20, reducing the impurities in the water. Once the water quality in the first pipe 10 is acceptable, the switch valve is reopened to allow the water to flow into subsequent pipes.

[0123] Optionally, both the switching valve and the water quality analyzer 103 can be electrically connected to the aforementioned controller, and the controller controls the switching valve 102 based on the detection results of the water quality analyzer 103. For example, when the water quality analyzer 103 detects that the water quality is unqualified, the controller controls the switching valve 102 to close; when the water quality analyzer 103 detects that the water quality is qualified, the controller controls the switching valve 102 to open.

[0124] In some examples, Figure 13 Based on the illustrated embodiment, a magnetic adsorption structure (not shown) is also included. The magnetic adsorption structure can be the magnetic adsorption structure 40 described above, and will not be repeated here.

[0125] In some examples, Figure 13 Based on the illustrated embodiment, a tapered tube (not shown) is also included. The tapered tube can be the tapered tube 201 described above, and will not be repeated here.

[0126] Figure 14 This is another structural schematic diagram of a water treatment device provided in an embodiment of this disclosure. For example... Figure 14 As shown, in this water treatment device, a filter 81 is connected in series between the one-way valve 202 and the anti-scaling tank 203. Exemplarily, the filter 81 can be a U-flange filter. By setting this filter 81, the water discharged from the anti-scaling tank 203 is filtered to further reduce impurities in the water. The filtration accuracy of the filter 81 can be greater than that of the filter structure 50; for example, the filter 81 can be a 100-300 mesh filter. It is understood that a higher mesh filter can also be selected depending on the requirements for impurities in the water. Using the filter structure 50 for primary filtration and the filter 81 for high-efficiency filtration, the water can capture and filter large, medium, and small (light and heavy) objects without increasing the local resistance of the pipeline.

[0127] In some examples, first inspection valves 82 can also be provided on both sides of the filter 81. By closing the two first inspection valves 82, the filter 81 can be isolated, thereby facilitating the maintenance or even replacement of the filter 81.

[0128] In some examples, second maintenance valves 83 can be provided on both sides of the filter structure 50. By closing the two second maintenance valves 83, the filter structure 50 can be isolated, thereby facilitating the maintenance or even replacement of the filter structure 50.

[0129] This disclosure also provides a carbon dioxide energy storage system, which includes, as described above, a carbon dioxide gas-liquid phase change energy storage system. Figures 1 to 14 Any of the water treatment devices shown.

[0130] Including Figure 10 Taking the water treatment device shown as an example, in this carbon dioxide energy storage system, a second pipe 20 is connected to a first pipe 10, and a circulation pump 30 is connected in series on the second pipe 20. Since the second inlet of the second pipe 20 is close to the first outlet of the first pipe 10, and the second outlet of the second pipe 20 is close to the first inlet of the first pipe 10, the water in the first pipe 10 can enter from the second inlet of the second pipe 20 under the action of the circulation pump 30 before flowing out from the first outlet of the first pipe 10, and then return to the first pipe 10 from the second outlet of the second pipe 20.

[0131] By installing a magnetic adsorption structure 40 in the first pipe 10, which is opposite to the second inlet end of the second pipe 20, the magnetic adsorption structure 40 obstructs the water flow before it enters the second pipe 20 and adsorbs iron filings, thus removing the iron filings. A filter structure 50 is installed in the second pipe 20 to filter the water flowing through it, removing impurities not adsorbed by the magnetic adsorption structure 40. A drain pipe 60 is connected to the second pipe 20, and a drain valve 70 is connected to the drain pipe 60. The connection between the drain pipe 60 and the second pipe 20 is located between the filter structure 50 and the second inlet end of the second pipe 20. This allows the drain valve 70 to be opened after the filter structure 50 has filtered out certain impurities, allowing the impurities to be discharged through the drain pipe 60 by the water flow. By circulating water multiple times in the first pipe 10 and the second pipe 20, impurities in the water are significantly reduced, which is beneficial to improving water quality. It has a good effect on capturing and filtering large particles and small debris. The filtration process has minimal impact on the operation of the carbon dioxide gas-liquid phase change energy storage system. It captures and filters large, medium, and small (light and heavy) debris without increasing local pipe resistance. Furthermore, it promotes the free state of calcium and magnesium ions in the circulating water under neutral, acidic, and alkaline environments, preventing scaling and eliminating the need for softening treatment. When applied to a carbon dioxide energy storage system, the heat exchanger does not require shutdown for scale removal, ensuring its heat exchange efficiency. When applied to a carbon dioxide gas-liquid phase change energy storage system, the water discharged from the first outlet meets water quality requirements. Other pipes in the water circulation system, for example, can enter the heat exchanger to provide hot or cold water, without affecting the long-term heat exchange efficiency of the energy storage system. The application of water treatment devices is not limited to carbon dioxide gas-liquid phase change energy storage systems. They can also be applied to other systems with requirements regarding water impurities. The water treatment device is simply connected to the system's water pipeline. For example, the device can be installed in a bypass of the water pipeline. When the impurities in the bypass water meet the standards, the treated water can flow through the main water pipeline without affecting its resistance. The water treatment device can also be manufactured to conform to standard flange connection dimensions, allowing installation by removing a valve from the water pipeline, thus minimizing the space occupied by the pipeline.

[0132] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” “third,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an” or “a” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “comprising” or “including” and similar terms mean that the elements or objects preceding “comprising” or “including” encompass the elements or objects listed following “comprising” or “including” and their equivalents, and do not exclude other elements or objects. The terms “connected” or “linked” and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms “upper,” “lower,” “left,” “right,” “front,” and “back” are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described objects changes.

[0133] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0134] The above description is merely an optional embodiment of this disclosure and is not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. A water treatment device, characterized in that, include: The first pipe (10) has a first inlet end and a first outlet end; The second pipe (20) has a second inlet and a second outlet. The second inlet is connected to the first pipe (10). Both the second inlet and the second outlet are connected to the first pipe (10). The second inlet is close to the first outlet, and the second outlet is close to the first inlet. The magnetic adsorption structure (40), at least partially located in the first pipe (10) and opposite to the second water inlet, is used to adsorb metal impurities in the water; A filter structure (50) is located in the second pipe (20) and is used to filter impurities in the water. Second maintenance valves (83) are provided on both sides of the filter structure (50). A one-way valve (202) is connected in series on the second pipe (20) and located between the second water outlet and the filter structure (50); A circulation pump (30) is located between the one-way valve (202) and the filter structure (50); An anti-scaling tank (203) is connected in series with the second pipe (20) and located between the circulating pump (30) and the filter structure (50). The anti-scaling tank (203) is used to inject pressurized gaseous carbon dioxide. A filter (81) is connected in series between the one-way valve (202) and the anti-scaling tank (203), and a first maintenance valve (82) is provided on both sides of the filter (81). The drain pipe (60) is connected at one end to the second pipe (20), and the connection is located between the filter structure (50) and the second water inlet.

2. The water treatment device according to claim 1, characterized in that, The magnetic adsorption structure (40) includes a non-magnetic shell (401) and an electromagnet (402). The electromagnet (402) is located inside the non-magnetic shell (401) and is detachably connected to the non-magnetic shell (401). The non-magnetic shell (401) is connected to the first pipe (10). The non-magnetic shell (401) is at least partially located inside the first pipe (10) so that the electromagnet (402) is at least partially located inside the first pipe (10). The lower end of the non-magnetic shell (401) extends beyond the lower wall of the first pipe (10).

3. The water treatment device according to claim 2, characterized in that, The first pipe (10) has a mounting hole (10a) on its wall. The non-magnetic outer shell (401) is at least partially inserted into the first pipe through the mounting hole (10a). The non-magnetic outer shell (401) is sealed to the wall of the mounting hole (10a).

4. The water treatment device according to claim 2, characterized in that, It also includes a tapered tube (201) that connects the second water inlet and the first pipe (10). The larger diameter end of the tapered tube (201) is connected to the first pipe (10) and is opposite to the end of the non-magnetic shell (401). The diameter of the larger diameter end of the tapered tube (201) is greater than the diameter of the non-magnetic shell (401).

5. The water treatment apparatus according to any one of claims 1 to 4, characterized in that, The filter structure (50) includes a filter screen (501) and a differential pressure sensor (502), with two pressure detection ports of the differential pressure sensor (502) located on opposite sides of the filter screen (501).

6. The water treatment apparatus according to any one of claims 1 to 4, characterized in that, It also includes a water quality tester (103), the test head of which is located inside the first pipe (10) and between the magnetic adsorption structure (40) and the first water outlet.

7. A carbon dioxide gas-liquid phase change energy storage system, characterized in that, Includes the water treatment apparatus as described in any one of claims 1 to 6.

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