CN117446927A

CN117446927A - Water quality treatment device and carbon dioxide gas-liquid phase-change energy storage system

Info

Publication number: CN117446927A
Application number: CN202311274751.8A
Authority: CN
Inventors: 惠大好; 汪晓勇
Original assignee: Baihe New Energy Technology Shenzhen Co ltd
Current assignee: Baihe New Energy Technology Shenzhen Co ltd
Priority date: 2023-09-26
Filing date: 2023-09-26
Publication date: 2024-01-26

Abstract

The disclosure provides a water quality treatment device and a carbon dioxide energy storage system, and belongs 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 is provided with a first water inlet end and a first water outlet end; the second pipeline is provided with 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 positioned in the first pipeline and is opposite to the second water inlet end and is used for adsorbing metal impurities in water; the filtering structure is positioned in the second pipeline; one end of the drain pipe is communicated with the second pipeline, and the joint is positioned between the filtering structure and the second water inlet end. Through setting up magnetic adsorption structure in first pipeline, magnetic adsorption structure can produce certain hindrance to the aquatic to adsorb the iron fillings in the aquatic, get rid of the iron fillings in the aquatic, set up filtration in the second pipeline, filter the water of flow through the second pipeline, the filtering is wherein not by the absorptive impurity of magnetic adsorption structure.

Description

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

Technical Field

The disclosure relates to the field of carbon dioxide energy storage, and in particular relates to a water quality treatment device and a carbon dioxide energy storage system.

Background

With the development of industrialization progress, carbon dioxide emission is rapidly increased, and climate change caused by greenhouse effect forms a serious threat. And the carbon dioxide energy storage system not only can utilize carbon dioxide to store energy, but also can reduce the emission of carbon dioxide and weaken the greenhouse effect.

In a carbon dioxide gas-liquid phase-change energy storage system, pipeline flushing (purging) is important, if impurities in a pipeline enter a heat exchanger, the design effect of equipment such as the heat exchanger is affected slightly, and the whole system is paralyzed seriously. These impurities may be gravel, scrap iron, etc. contained in the water body itself in the pipeline, or may be scrap iron generated by particles such as welding slag or rust when the pipeline is not flushed (purged) in place. In the existing pipeline flushing (sweeping) scheme, an existing filter is adopted, because pipeline resistance of a system is an important parameter in design, a filtering hole of the filter cannot be too small, the existing filter can only filter relatively large objects, the existing filter cannot play a role on slightly small objects (such as scrap iron with sand grain size), and the disassembly of the filter is troublesome. If the impurities in the pipeline remain and accumulate for a long time, the heat exchange effect of the carbon dioxide gas-liquid phase-change energy storage system is affected.

In addition, calcium and magnesium ions in pipeline water of the carbon dioxide gas-liquid phase-change energy storage system are easy to form scale, and the heat exchange effect of the carbon dioxide gas-liquid phase-change energy storage system is also affected.

Disclosure of Invention

To solve at least one technical problem described above, embodiments of the present disclosure provide a water quality treatment device and a carbon dioxide energy storage system, which can reduce impurities in a pipeline system. The technical scheme is as follows:

in a first aspect, embodiments of the present disclosure provide a water quality treatment apparatus, comprising:

the first pipeline is provided with a first water inlet end and a first water outlet end;

the second pipeline is provided with 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 positioned 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 positioned in the second pipeline and is used for filtering impurities in water;

and one end of the drain pipe is communicated with the second pipeline, and the connecting part is positioned between the filtering structure and the second water inlet end.

Optionally, the magnetic adsorption structure includes a nonmagnetic shell and an electromagnet, the electromagnet is located in the nonmagnetic shell and detachably connected with the nonmagnetic shell, the nonmagnetic shell is connected with the first pipeline, the nonmagnetic shell is at least partially located in the first pipeline, so that the electromagnet is at least partially located in the first pipeline, and the lower end of the nonmagnetic shell exceeds the lower pipe wall of the first pipeline.

Optionally, the wall of the first pipeline is provided with a mounting hole, the nonmagnetic shell is at least partially inserted into the first pipeline through the mounting hole, and the nonmagnetic shell is in sealing connection with the hole wall of the mounting hole.

Optionally, the device further comprises a conical tube, wherein the conical tube is communicated with the second water inlet end and the first pipeline, one end with a larger diameter of the conical tube is connected with the first pipeline and is opposite to the end part of the nonmagnetic shell, and the diameter of the one end with the larger diameter of the conical tube is larger than the diameter of the nonmagnetic shell.

Optionally, the conical tube and the nonmagnetic shell are coaxially arranged.

Optionally, the filtering structure comprises a filter screen and a differential pressure sensor, wherein two pressure detection ports of the differential pressure sensor are positioned on two opposite sides of the filter screen.

Optionally, the second water inlet end and the second water outlet end are both communicated with the first pipeline, the second water inlet end is close to the first water outlet end, the second water outlet end is close to the first water inlet end, the water quality treatment device further comprises a one-way valve and a circulating pump, the one-way valve is connected to the second pipeline in series and is located between the second water outlet end and the filtering structure, and the circulating pump is located between the one-way valve and the filtering structure.

Optionally, the water quality treatment device further comprises an anti-scaling tank, wherein the anti-scaling tank is connected in series on the second pipeline and is positioned between the circulating pump and the filtering structure, and the anti-scaling tank is used for injecting pressurized gaseous carbon dioxide.

Optionally, the water quality treatment device further comprises a water quality detector, wherein a detection head of the water quality detector is positioned in the first pipeline and between the magnetic adsorption structure and the first water outlet end.

In a second aspect, embodiments of the present disclosure further provide a water quality treatment apparatus, including:

the second pipeline is provided with a second water inlet end and a second water outlet end, the second water inlet end and the second water outlet end are communicated with the first pipeline, the second water inlet end is close to the first water outlet end, and the second water outlet end is close to the first water inlet end;

the anti-scaling tank is connected in series on the second pipeline and is used for injecting pressurized gaseous carbon dioxide.

In a third aspect, embodiments of the present disclosure also provide a carbon dioxide energy storage system comprising any one of the water treatment devices of the first aspect.

The technical scheme provided by the embodiment of the disclosure has the beneficial effects that at least one of the following is included:

(1) By connecting the second pipe on the side wall of the first pipe, water in the first pipe can enter the second pipe from the second water inlet end of the second pipe. Through setting up magnetic adsorption structure in first pipeline, magnetic adsorption structure is relative with the second water inlet end of second pipeline, and water before getting into the second pipeline, magnetic adsorption structure can produce certain hindrance to water to adsorb the iron fillings in the aquatic, get rid of the iron fillings in the aquatic.

(2) And filtering water flowing through the second pipeline by arranging a filtering structure in the second pipeline to filter out impurities which are not adsorbed by the magnetic adsorption structure. The drain pipe is connected to the second pipeline, and the joint of the drain pipe and the second pipeline is located between the filtering structure and the second water inlet end of the second pipeline, so that after a certain impurity is filtered by the filtering structure, the drain pipe can be conducted, and the impurity is discharged through the drain pipe under the drive of water flow. So that the impurities of the water discharged from the first water outlet end of the first pipeline are less.

(3) The device has good capturing and filtering effects on large particles and fine blocks, has small influence on the operation of an energy storage system during water treatment, and can complete capturing and filtering of large, medium and small (light and heavy) blocks under the condition of not increasing the local resistance of a pipeline.

(4) The pressurized gaseous carbon dioxide is injected into the anti-scaling tank, so that calcium ions and magnesium ions in water are always in a free state under neutral, acidic and alkaline environments, scaling is avoided, softening treatment is not needed, and when the anti-scaling tank is applied to a carbon dioxide energy storage system, a heat exchanger does not need to be stopped to clean scale, so that the heat exchange effect of the heat exchanger is ensured.

(5) The water quality treatment device is manufactured to be consistent with the standard flange connection size, and the water quality treatment device is installed by disassembling a valve, so that the water quality treatment device does not occupy more positions of water pipelines (systems).

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and other drawings may be obtained according to these drawings without inventive effort for a person of ordinary skill in the art.

FIG. 1 is a schematic view of a water treatment apparatus according to an embodiment of the present disclosure;

FIG. 2 is an enlarged schematic view at A in FIG. 1;

FIG. 3 is a schematic illustration of the installation of a magnetic attraction structure provided by an embodiment of the disclosure;

FIG. 4 is another schematic view of a water treatment apparatus according to an embodiment of the present disclosure;

FIG. 5 is a schematic view of a water treatment apparatus according to an embodiment of the present disclosure;

FIG. 6 is a schematic view of a water treatment apparatus according to an embodiment of the present disclosure;

FIG. 7 is another schematic view of a water treatment apparatus according to an embodiment of the present disclosure;

FIG. 8 is another schematic view of a water treatment apparatus according to an embodiment of the present disclosure;

FIG. 9 is another schematic view of a water treatment apparatus according to an embodiment of the present disclosure;

FIG. 10 is another schematic view of a water treatment apparatus according to an embodiment of the present disclosure;

FIG. 11 is another schematic view of a water treatment apparatus according to an embodiment of the present disclosure;

FIG. 12 is another schematic view of a water treatment apparatus according to an embodiment of the present disclosure;

FIG. 13 is another schematic view of a water treatment apparatus according to an embodiment of the present disclosure;

fig. 14 is another schematic structural view of a water treatment apparatus according to an embodiment of the present disclosure.

Detailed Description

For the purposes of clarity, technical solutions and advantages of the present disclosure, the following further details the embodiments of the present disclosure with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a water treatment device according to an embodiment of the present disclosure. As shown in fig. 1, the flow direction of the water flow is schematically shown by arrows in fig. 1. As shown in fig. 1, the water quality treatment apparatus includes a first pipe 10, a second pipe 20, a magnetic adsorption structure 40, a filtering structure 50, and a drain pipe 60.

Wherein the first conduit 10 has a first water inlet end and a first water outlet end. The second conduit 20 has a second water inlet end and a second water outlet end, the second water inlet end being in communication with the first conduit 10.

The magnetic adsorption structure 40 is at least partially located in the first conduit 10 and opposite the second water inlet end. The magnetic adsorption structure 40 is used for adsorbing magnetic impurities such as metal impurities in water. A filter structure 50 is located in the second pipe 20, the filter structure 50 being used for filtering impurities in the water. The impurities include at least large, medium and small (light, heavy) mass such as stones, sand. One end of the drain pipe 60 communicates with the second conduit 20 and the junction is located between the filter structure 50 and the second water inlet end.

Illustratively, the second water inlet end is positioned below the first pipe 10, and water containing large, medium and small (light and heavy) particles, which facilitates removal of magnetic impurities such as scrap iron, is blocked from flowing into the second pipe 20 through the second water inlet end under the action of its own weight by the magnetic adsorption structure 40.

By attaching the 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 the second water inlet end of the second pipe 20. Through setting up magnetic adsorption structure 40 in first pipeline 10, magnetic adsorption structure 40 is relative with the second water inlet end of second pipeline 20, and water before getting into second pipeline 20, magnetic adsorption structure 40 can produce certain hindrance to water to adsorb magnetic impurities such as iron fillings in the aquatic, get rid of impurities such as iron fillings in the aquatic. After the water containing large, medium and small (light and heavy) particles, such as scrap iron and other magnetic impurities, is blocked by the magnetic adsorption structure 40 from flowing into the second pipeline 20, the large particles in the water are filtered by arranging the filter structure 50 in the second pipeline 20, and impurities which are not adsorbed by the magnetic adsorption structure 40 are filtered.

By connecting the drain pipe 60 to the second pipe 20, the connection between the drain pipe 60 and the second pipe 20 is located between the filtering structure 50 and the second water inlet end of the second pipe 20, so that after the filtering structure 50 filters a certain impurity, the drain pipe 60 can be conducted, and the impurity is discharged through the drain pipe 60 under the driving of the water flow. Thus, large, medium and small (light and heavy) object blocks contained in the water in the first pipeline 10 are captured and filtered, so that the water discharged from the first water outlet end meets the water quality requirement, and the water is applied to a carbon dioxide gas-liquid phase energy storage system, and the heat exchange effect of the long-term operation of the energy storage system is not influenced.

As shown in fig. 1, between the filtering structure 50 and the second water inlet end of the second pipe 20, the second pipe 20 is disposed near the filtering structure 50, and a lower portion of a pipe wall of the second pipe 20 is disposed obliquely, and the drain pipe 60 is connected to a lowest position of the obliquely disposed pipe wall, and the obliquely disposed pipe wall is advantageous for collecting large, medium and small (light and heavy) impurities near a junction of the drain pipe 60 and the second pipe 20.

Fig. 2 is an enlarged schematic view at a in fig. 1. As shown in fig. 2, the magnetic attraction structure 40 includes a nonmagnetic housing 401 and an electromagnet 402. The electromagnet 402 is located in the nonmagnetic casing 401 and is detachably connected with the nonmagnetic casing 401. The nonmagnetic shell 401 is connected to the first pipe 10, and the nonmagnetic shell 401 is at least partially located in the first pipe 10, so that the electromagnet 402 is at least partially located in the first pipe 10, and the lower end of the nonmagnetic shell 401 exceeds the lower pipe wall of the first pipe 10. Specifically, the upper end of the nonmagnetic housing 401 may be in contact with the pipe inner wall of the first pipe 10, so that the nonmagnetic housing 401 is entirely located within the first pipe 10 so that the electromagnet 402 is entirely located within the first pipe 10. The upper end of the nonmagnetic casing 401 may also protrude outside the first pipe 10 through the pipe inner wall of the first pipe 10 such that the nonmagnetic casing 401 is partially located inside the first pipe 10 so that the electromagnet 402 is partially located inside the first pipe 10.

By mounting the nonmagnetic casing 401 on the first pipe 10, the electromagnet 402 is accommodated with the nonmagnetic casing 401. Upon energization of the electromagnet 402, a magnetic field can be formed within the first conduit 10. When the water flow in the first pipe 10 passes around the nonmagnetic casing 401, the impurities such as rust in the water flow, which can be adsorbed by the electromagnet 402, are adsorbed to the surface of the nonmagnetic casing 401 and gather on the surface of the nonmagnetic casing 401, and do not continue to advance with the water flow. The left and right sides of the nonmagnetic shell 401 have a gap with the inner wall of the pipe of the first pipe 10, the gap is small and smaller than the diameter of sand grains, and only the contained water flows through the left and right sides of the nonmagnetic shell 401. The lower end of the nonmagnetic shell 401 exceeds the lower pipe wall of the first pipe 10 and enters the second water inlet end, so that water containing impurities which are not adsorbed by the magnetic adsorption structure 40 can enter the second water inlet end along the nonmagnetic shell 401. The diameter of the second water inlet end is larger than the diameter of the large particles, and water containing the large, medium and small (light and heavy) particles is blocked by the magnetic adsorption structure 40 from entering the second pipeline 20 for filtering under the action of dead weight through the second water inlet end.

Also, due to the isolation of the nonmagnetic housing 401, maintenance, e.g., repair or replacement, of the electromagnet 402 may be more convenient without shutting down the water flow within the first conduit 10, e.g., without affecting normal energy storage system operation.

The nonmagnetic shell 401 may be a tubular structure made of a metal material or a nonmetallic material, and the tubular structure may be closed at one end and open at the other end, or may be closed at both ends. When the nonmagnetic case 401 is made of a metal material, it may be a metal that is not magnetized by a magnet, for example, an aluminum alloy or the like, a copper alloy or the like.

In some examples, nonmagnetic shell 401 may be cylindrical, or may be tapered or irregularly shaped.

Fig. 3 is an installation schematic diagram of a magnetic attraction structure provided in an embodiment of the disclosure. As shown in fig. 3, the wall of the first pipe 10 is provided with a mounting hole 10a, and the nonmagnetic shell 401 is at least partially inserted into the first pipe 10 through the mounting hole 10 a. The nonmagnetic casing 401 is hermetically connected with the wall of the mounting hole 10 a.

By providing the mounting hole 10a on the wall of the first pipe 10, the nonmagnetic shell 401 is at least partially inserted into the first pipe 10 through the mounting hole 10a, and the nonmagnetic shell 401 is hermetically connected with the wall of the mounting hole 10a to avoid leakage. The nonmagnetic housing 401 and the wall of the mounting hole 10a may be sealed by welding or by a seal ring, for example.

Fig. 4 is another schematic structural view of a water treatment apparatus according to an embodiment of the present disclosure. As shown in fig. 4, the water quality treatment apparatus further includes a tapered pipe 201, and the tapered pipe 201 communicates the second water inlet end with the first pipe 10. The larger diameter end of the conical tube 201 is connected to the first conduit 10 opposite the end of the nonmagnetic shell 401. The diameter of the larger end of the conical tube 201 is larger than the diameter of the nonmagnetic housing 401.

The lower end of the nonmagnetic shell 401 exceeds the lower pipe wall of the first pipe 10, and the lower end of the nonmagnetic shell 401 enters the conical pipe 201, so that water containing impurities which are not adsorbed by the magnetic adsorption structure 40 can enter the conical pipe 201 along the nonmagnetic shell 401. The conical tube 201 is funnel-shaped with the larger diameter end facing the magnetic adsorption structure 40. The water flow forms a vortex under the action of gravity and gravitational force at the conical pipe 201, and impurities in the water body enter the second pipeline 20 more easily under the action of the vortex, and are filtered by the filtering structure 50 in the second pipeline 20.

As an example, both ends of the tapered tube 201 may be welded to the first pipe 10 and the second pipe 20, respectively.

Alternatively, the conical tube 201 is located directly below the magnetic attraction structure 40.

The conical tube 201 is arranged right below the magnetic adsorption structure 40, after a great amount of impurities such as rust are adsorbed by the magnetic adsorption structure 40, the electromagnet 402 can be powered off, so that the impurities adsorbed on the surface of the nonmagnetic shell 401 can just drop into the conical tube 201, then blocked by the filtering structure 50, and finally discharged through the drain tube 60.

Fig. 5 is a schematic view of a partial structure of a water treatment apparatus according to an embodiment of the present disclosure. As shown in fig. 5, in this example, the conical tube 201 and the nonmagnetic housing 401 are coaxially arranged. This further facilitates the entry of impurities into the conical tube 201.

Fig. 6 is a schematic view of a partial structure of a water treatment apparatus according to an embodiment of the present disclosure. As shown in fig. 6, filter structure 50 includes a filter screen 501 and a differential pressure sensor 502. The two pressure sensing ports of differential pressure sensor 502 are located on opposite sides of filter 501.

By providing differential pressure sensor 502 and disposing two pressure detection ports of differential pressure sensor 502 on opposite sides of filter screen 501, differential pressure sensor 502 is able to detect a pressure differential across filter screen 501.

The filter screen 501 can filter impurities in the water body, and as the impurities are continuously accumulated on the surface of the filter screen 501 close to the conical tube 201, the pressure on the surface of the filter screen 501 close to the conical tube 201 is continuously increased, and the pressure difference on the two surfaces of the filter screen 501 is continuously increased. Since the differential pressure sensor 502 can detect a pressure difference across the filter 501, the degree to which impurities accumulate at the filter 501 can be detected based on the detection result of the differential pressure sensor 502. When the pressure difference between the two sides of the filter screen 501 reaches a certain level, i.e. impurities accumulate at the filter screen 501 to a certain extent, the drain pipe 60 can be conducted, so that the impurities accumulated at the filter screen 501 are discharged from the drain pipe 60 under the drive of water flow.

As shown in fig. 6, a drain valve 70 may be connected to an end of the drain pipe 60 remote from the first pipe 20, and the drain pipe 60 may be turned on by opening the drain valve 70.

Fig. 7 is another schematic structural view of a water treatment apparatus according to an embodiment of the present disclosure. As shown in fig. 7, in this example, the second water inlet end and the second water outlet end of the second pipe 20 are both communicated with the first pipe 10, and the second water inlet end is close to the first water outlet end, and the second water outlet end is close to the first water inlet end, compared to the water quality treatment apparatus shown in fig. 4. Further, in this example, the water treatment apparatus further includes a check valve 202 and a circulation pump 30, the check valve 202 being connected in series with the second pipe 20 and located between the second water outlet end and the filter structure 50, the circulation pump 30 being located between the check valve 202 and the filter structure 50.

By connecting the circulation pump 30 in series to the second pipe 20, since the second water inlet end of the second pipe 20 is close to the first water outlet end of the first pipe 10, the second water outlet end of the second pipe 20 is close to the first water inlet end of the first pipe 10, and therefore, the water in the first pipe 10 can enter from the second water inlet end of the second pipe 20 under the action of the circulation pump 30 before flowing out from the first water outlet end of the first pipe 10, and then returns to the first pipe 10 from the second water outlet end of the second pipe 20. By passing through the circulation between the second pipe 20 and the first pipe 10 a plurality of times, impurities in the water can be further reduced, and the quality of the water discharged from the first water outlet end of the first pipe 10 can be improved.

Fig. 8 is another schematic structural view of a water treatment apparatus according to an embodiment of the present disclosure. As shown in fig. 8, compared with the water treatment device shown in fig. 7, in this example, the water treatment device further includes an anti-scaling tank 203, the anti-scaling tank 203 is connected in series on the second pipeline 20, and the anti-scaling tank 203 is located between the circulating pump 30 and the filtering structure 50, and the anti-scaling tank 203 is used for injecting pressurized gaseous carbon dioxide, so that calcium ions and magnesium ions in water are always in a free state in neutral, acidic and alkaline environments, and cannot scale, and softening treatment is not needed, and when the water treatment device is applied to a carbon dioxide energy storage system, a heat exchanger does not need to stop to clean scale, and the heat exchange effect of the heat exchanger is ensured.

By providing the anti-scaling tank 203, the water flowing through the second pipe 20 can be subjected to an acid washing treatment, and the acid washing treated water can be prevented from scaling during the water recycling process.

Fig. 9 is a schematic structural diagram of a water treatment device according to an embodiment of the present disclosure. As shown in fig. 9, in comparison with the water quality treatment apparatus shown in fig. 8, in this example, the water quality treatment apparatus further includes a water quality detector 103, and a detection head of the water quality detector 103 is located in the first pipe 10 and between the magnetic adsorption structure 40 and the first water outlet end.

Illustratively, the water quality detector 103 is a detector for detecting insoluble impurities in water.

By arranging the water quality detector 103 on the first pipeline 10, the water quality in the first pipeline 10 is detected by the water quality detector 103, and when the water quality in the first pipeline 10 is unqualified, for example, the impurity content in the water body is too high, the circulating pump 30 is controlled to be started, so that the water body is circularly filtered in the first pipeline 10 and the second pipeline 20, and the impurity in the water body is reduced.

Fig. 10 is another schematic structural view of a water treatment apparatus according to an embodiment of the present disclosure. The flow direction of the water flow is schematically shown by arrows in fig. 10. As shown in fig. 10, the water quality treatment apparatus includes a first pipe 10, a second pipe 20, a circulation pump 30, a magnetic adsorption structure 40, a filtering structure 50, a drain pipe 60, and a drain valve 70.

Wherein the first conduit 10 has a first water inlet end and a first water outlet end. The second pipe 20 has a second water inlet end and a second water outlet end, both of which are communicated with the first pipe 10, and the second water inlet end is close to the first water outlet end, and the second water outlet end is close to the first water inlet end.

The circulation pump 30 is connected in series with the second pipe 20. The magnetic adsorption structure 40 is located in the first pipeline 10 and is opposite to the second water inlet end. A filter structure 50 is located in the second conduit 20. One end of the drain pipe 60 is communicated with the second pipeline 20, and the joint is positioned between the filtering structure 50 and the second water inlet end; a drain valve 70 is connected to the other end of the drain pipe 60.

As shown in fig. 10, flanges 101 are further connected to both ends of the first pipe 10, respectively, and the flanges 101 are provided to facilitate connection of the first pipe 10 to other pipes in the pipe system for water circulation.

The flange 101 may be bolted to the flange 101 of the other pipe by means of bolts, for example. A sealing ring can be clamped between the flange 101 and the flange 101 to improve the sealing performance and avoid water leakage at the joint.

In the embodiment of the present disclosure, the second pipe 20 may include a plurality of sections of pipes, and the connection in series with the second pipe 20 means that the connection is between two adjacent sections of pipes. For example, the circulating pump 30 is connected in series to the second pipeline 20, which means that the water inlet of the circulating pump 30 is connected to one end of one of the two adjacent sections of pipeline, and the water outlet of the circulating pump 30 is connected to one end of the other of the two adjacent sections of pipeline.

By connecting the second pipeline 20 to the first pipeline 10, the second pipeline 20 is connected with the circulating pump 30 in series, and since the second water inlet end of the second pipeline 20 is close to the first water outlet end of the first pipeline 10 and the second water outlet end of the second pipeline 20 is close to the first water inlet end of the first pipeline 10, water in the first pipeline 10 can enter from the second water inlet end of the second pipeline 20 under the action of the circulating pump 30 before flowing out from the first water outlet end of the first pipeline 10, and then returns to the first pipeline 10 from the second water outlet end of the second pipeline 20 for next circulation.

By providing the magnetic adsorption structure 40 in the first pipe 10, the magnetic adsorption structure 40 is opposite to the second water inlet end of the second pipe 20, and the magnetic adsorption structure 40 can generate a certain obstruction to water before the water enters the second pipe 20, and adsorb scrap iron in the water to remove the scrap iron in the water. By providing the filtering structure 50 in the second pipe 20, the water flowing through the second pipe 20 is filtered to remove impurities therein that are not adsorbed by the magnetic adsorption structure 40.

By connecting the drain pipe 60 to the second pipe 20, and connecting the drain valve 70 to the drain pipe 60, the connection between the drain pipe 60 and the second pipe 20 is located between the filtering structure 50 and the second water inlet end of the second pipe 20, so that after the filtering structure 50 filters a certain impurity, the drain valve 70 can be opened, and the impurity is discharged through the drain pipe 60 under the driving of the water flow. By circulating the water in the first pipeline 10 and the second pipeline 20 for a plurality of times, impurities in the water body are greatly reduced, and the water quality is improved.

As shown in fig. 10, the wall of the first pipe 10 has a mounting hole 10a, and the mounting hole 10a is opposite to the second water inlet end. Illustratively, the upper end of the pipe wall of the first pipe 10 has a mounting hole 10a. The magnetic attraction structure 40 includes a nonmagnetic housing 401 and an electromagnet 402. The nonmagnetic shell 401 is inserted into the mounting hole 10a, and the nonmagnetic shell 401 is connected with the pipe wall of the first pipe 10 in a sealing manner. An electromagnet 402 is located in the nonmagnetic housing 401.

By providing the mounting hole 10a on the pipe wall of the first pipe 10, the nonmagnetic shell 401 is at least partially inserted into the first pipe 10 through the mounting hole 10a, so that a cavity is formed in the first pipe 10 to conveniently accommodate the electromagnet 402, and the electromagnet 402 can form a magnetic field in the first pipe 10 after being electrified. When the water flow in the first pipe 10 passes around the nonmagnetic casing 401, the impurities such as rust in the water flow, which can be adsorbed by the electromagnet 402, are adsorbed to the surface of the nonmagnetic casing 401 and gather on the surface of the nonmagnetic casing 401, and do not continue to advance with the water flow. The front and rear sides of the nonmagnetic shell 401 have a gap with the inner wall of the pipe of the first pipe 10, the gap is small and smaller than the diameter of sand grains, and only the contained water flows through the front and rear sides of the nonmagnetic shell 401. The diameter of the second water inlet end is larger than the diameter of the large particles, and water containing the large, medium and small (light and heavy) particles is blocked by the magnetic adsorption structure 40 from entering the second pipeline 20 for filtering under the action of dead weight through the second water inlet end.

Moreover, due to the isolation of the nonmagnetic housing 401, maintenance, such as repair or replacement, of the electromagnet 402 may be more convenient without shutting down the water flow within the first conduit 10, thereby not affecting normal energy storage system operation.

As shown in fig. 10, the water treatment apparatus further comprises a tapered pipe 201, wherein the tapered pipe 201 communicates the second water inlet end with the first pipe 10, and the end of the tapered pipe 201 with a larger diameter is connected to the first pipe 10 opposite to the end of the nonmagnetic shell 401. The diameter of the larger end of the conical tube 201 is larger than the diameter of the nonmagnetic housing 401.

The conical tube 201 is funnel-shaped with the larger diameter end facing the magnetic adsorption structure 40. The water flow forms a vortex under the action of gravity and gravitational force at the conical pipe 201, and impurities in the water body enter the second pipeline 20 more easily under the action of the vortex, and are filtered by the filtering structure 50 in the second pipeline 20.

In some examples, the drain valve 70 may be an electrically controlled valve. For example, an electromagnetic switch valve. The water treatment apparatus may also include a controller electrically connected to the drain valve 70 and the differential pressure sensor 502, respectively. The controller is used for controlling the opening of the water drain valve 70 when the differential pressure sensor 502 detects that the pressure difference across the filter screen 501 reaches a preset value.

The preset value may be set according to specific requirements, so that impurities can be discharged from the second pipe 20 in time, and the drain valve 70 is not opened too frequently.

Optionally, the controller may also be electrically connected to the circulation pump 30 to control the start and stop of the circulation pump 30.

As shown in fig. 10, the drain pipe 60 may be located directly below the second pipe 20, which is more advantageous for discharging impurities from the drain pipe 60 under the action of water flow.

As shown in fig. 10, the water treatment apparatus further includes a check valve 202. The check valve 202 is connected in series with the second conduit 20. The check valve 202 is located between the second water outlet end of the second conduit 20 and the filter structure 50, and the circulation pump 30 is located between the check valve 202 and the filter structure 50.

By arranging the one-way valve 202, water in the second pipeline 20 can only flow from the second water inlet end to the second water outlet end of the second pipeline 20 through the filter structure 50, so that water in the first pipeline 10 is prevented from flowing into the second pipeline 20 from the second water outlet end of the second pipeline 20 under the action of pressure, and flows into the first water outlet end from the second water inlet end through the filter structure 50.

In this example, by disposing the circulation pump 30 between the check valve 202 and the filter structure 50, that is, at the water inlet end of the check valve 202, damage to the circulation pump 30 when the water pressure at the second water outlet end of the second pipe 20 is too high can be avoided.

As shown in fig. 10, the water treatment apparatus further includes an anti-scaling tank 203. An anti-fouling tank 203 is connected in series on the second conduit 20, and the anti-fouling tank 203 is located between the circulation pump 30 and the filtering structure 50. A carbon dioxide injection pipe 2031 is connected to the tank wall of the anti-scaling tank 203.

The water body generally contains a certain amount of metal ions such as calcium, magnesium and the like, which are easy to scale, and can influence the normal operation of the heat exchanger of the carbon dioxide energy storage system.

In the embodiment of the present disclosure, by connecting the anti-scaling tank 203 in series in the second pipe 20, the carbon dioxide injection pipe 2031 is connected to the tank wall of the anti-scaling tank 203, and the water body flows through the anti-scaling tank 203 when circulating in the second pipe 20. Carbon dioxide gas is injected into the water body in the anti-scaling tank 203 through the carbon dioxide injection pipe 2031, so that the carbon dioxide is dissolved into the water body, and calcium ions and magnesium ions in the water are always in a free state in neutral, acidic and alkaline environments, and scaling is avoided, and softening treatment is not needed. The concentration of the calcium ions and the magnesium ions in the water body can be controlled by injecting the pressurized carbon dioxide into the water body in the anti-scaling tank 203 through the carbon dioxide injection pipe 2031, wherein the injection pressure of the carbon dioxide is not higher than the pressure of a water pipeline (system) at the highest and is normal pressure at the lowest. The carbon dioxide is dissolved in water under the action of pressure to form bicarbonate, and calcium and magnesium ions in the circulating water system are combined with the bicarbonate to form calcium bicarbonate and magnesium bicarbonate. The calcium ions and the magnesium ions in the water are always in a free state in neutral, acidic and alkaline environments, scaling is avoided, softening treatment is not needed, and when the heat exchanger is applied to a carbon dioxide energy storage system, shutdown is not needed to clean scale, so that the heat exchange effect of the heat exchanger is ensured.

As shown in fig. 10, the water treatment apparatus further includes an overpressure relief valve 2032. An overpressure vent 2032 is connected to the roof of the anti-fouling tank 203.

The overpressure relief valve 2032 serves to improve safety. When the pressure in the anti-scaling tank 203 is too high and exceeds a preset pressure value, the overpressure air release valve 2032 is conducted to release redundant carbon dioxide gas in the anti-scaling tank 203 and reduce the pressure in the anti-scaling tank 203.

The pressure threshold at which the excess pressure relief valve 2032 is turned on may be set according to the pressure resistance degree of the anti-scaling tank 203 to ensure the safety of the water quality treatment apparatus.

As shown in fig. 10, the water quality treatment apparatus further includes a water quality detector 103. The detection head of the water quality detector 103 is located in the first pipeline 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 pipeline 10.

Alternatively, the water quality detector 103 may be electrically connected to the aforementioned controller, which controls the circulation pump 30 based on the detection result of the water quality detector 103. For example, when the water quality detector 103 detects that the water quality is not acceptable, the controller controls the circulation pump 30 to be started; when the water quality detector 103 detects that the water quality is qualified, the controller controls the circulating pump 30 to stop.

As shown in fig. 10, in this example, the water treatment apparatus further includes an on-off valve 102, the on-off valve 102 is connected in series in the first pipe 10, and the on-off valve 102 is located between the magnetic adsorption structure 40 and the first water outlet end. The detection head of the water quality detector 103 is positioned between the magnetic adsorption structure 40 and the on-off valve 102.

By providing the on-off valve 102, the flow of the water in the first pipe 10 can be controlled. When the water quality detector 103 detects that the water quality in the first pipeline 10 is unqualified, for example, when the impurity content in the water body is too high, the switch valve 102 can be controlled to be closed, so that the water with unqualified water quality is prevented from continuously flowing to the subsequent pipeline. And then the circulating pump 30 is controlled to be started, so that the water body circulates in the first pipeline 10 and the second pipeline 20, and impurities in the water body are reduced. After the water quality in the first pipeline 10 is qualified, the switch valve 102 is controlled to be opened, so that the water flows to the subsequent pipeline.

Alternatively, both the on-off valve 102 and the water quality detector 103 may be electrically connected to the aforementioned controller, and the controller controls the on-off valve 102 based on the detection result of the water quality detector 103. For example, when the water quality detector 103 detects that the water quality is not acceptable, the controller controls the on-off valve 102 to be closed; when the water quality detector 103 detects that the water quality is qualified, the controller controls the switch valve 102 to be conducted.

Fig. 11 is a schematic structural view of a water treatment device according to an embodiment of the present disclosure. As shown in fig. 11, the water treatment apparatus includes a first pipe 10, a second pipe 20, and an anti-scaling tank 203.

The first conduit 10 has a first water inlet end and a first water outlet end. The second pipe 20 has a second water inlet end and a second water outlet end, both of which are communicated with the first pipe 10, and the second water inlet end is close to the first water outlet end, and the second water outlet end is close to the first water inlet end. The anti-scaling tank 203 is connected in series to the second pipeline 20, and the anti-scaling tank 203 is used for injecting carbon dioxide gas with pressure to prevent scaling.

The scale prevention tank 203 is provided to prevent scaling of calcium and magnesium ions in water flowing through the second pipe 20, and the calcium and magnesium ions in water are always in a free state in neutral, acidic and alkaline environments, carbon dioxide is dissolved in water under the action of pressure to form bicarbonate, calcium and magnesium ions in the circulating water system are combined with bicarbonate to form calcium bicarbonate and magnesium bicarbonate, and water containing the calcium bicarbonate and the magnesium bicarbonate is returned to the first pipe 10.

Fig. 12 is another schematic structural view of a water treatment apparatus according to an embodiment of the present disclosure. As shown in fig. 12, the water quality treatment apparatus in this example further includes a filter structure 50 and a drain pipe 60, as compared to the water quality treatment apparatus shown in fig. 11. A filter structure 50 is located in the second pipe 20, the filter structure 50 being used for filtering impurities in the water. One end of the drain pipe 60 communicates with the second conduit 20 and the junction is located between the filter structure 50 and the second water inlet end.

In the disclosed embodiment, the body of water flows through the anti-fouling tank 203 as it circulates in the second conduit 20. The anti-scaling tank 203 is used for injecting pressurized gaseous carbon dioxide, so that calcium ions and magnesium ions in water are always in a free state in neutral, acidic and alkaline environments, scaling is avoided, softening treatment is not needed, and when the anti-scaling tank is applied to a carbon dioxide energy storage system, a heat exchanger does not need to be stopped for cleaning scale, so that the heat exchange effect of the heat exchanger is ensured.

In some examples, referring to fig. 12, the water treatment apparatus further includes a check valve 202 and a circulation pump 30, wherein the check valve 202 is connected in series with the second pipe 20 and is located between the second water outlet end and the filter structure 50, and the circulation pump 30 is located between the check valve 202 and the filter structure 50. The functions of the check valve 202 and the circulation pump 30 are as described above and will not be described in detail herein.

A drain valve 70 may be connected to an end of the drain pipe 60 remote from the first pipe 20, and the drain pipe 60 may be turned on by opening the drain valve 70 to drain the impurities.

The structure of the anti-scaling tank 203 in this example may be the same as that of the anti-scaling tank 203 in fig. 10, or a carbon dioxide injection pipe may be connected to the wall of the anti-scaling tank 203 to inject pressurized gaseous carbon dioxide into the anti-scaling tank 203, so that calcium ions and magnesium ions in water are always in a free state in neutral, acidic and alkaline environments, and cannot scale, and softening treatment is not required.

Fig. 13 is another schematic structural view of a water treatment apparatus according to an embodiment of the present disclosure. As shown in fig. 13, the water quality treatment apparatus in this example further includes a water quality detector 103, as compared to the water quality treatment apparatus shown in fig. 12, the detection head of the water quality detector 103 is located in the first pipe 10 and between the magnetic adsorption structure 40 and the first water outlet end.

By arranging the water quality detector 103 on the first pipeline 10, the water quality detector 103 is utilized to detect the water quality in the first pipeline 10, and when the water quality in the first pipeline 10 is unqualified, for example, when the impurity content in the water body is too high, the water enters the second pipeline 20 and the first pipeline 10 for circulation, so that the impurities in the water body are reduced, and scaling is prevented.

In some examples, on the basis of the embodiment shown in fig. 13, an on-off valve (not shown) is further included, and the on-off valve is connected in series in the first pipe 10, and the on-off valve is located between the second water inlet end and the first water outlet end. The detection head of the water quality detector 103 is positioned between the second water inlet end and the switch valve.

By providing an on-off valve, the flow of the body of water in the first conduit 10 can be controlled. When the water quality detector 103 detects that the water quality in the first pipeline 10 is unqualified, for example, when the impurity content in the water body is too high, the switch valve can be controlled to be closed, so that the water with unqualified water quality is prevented from continuously flowing to the subsequent pipeline. And then the circulating pump 30 is controlled to be started, so that the water body circulates in the first pipeline 10 and the second pipeline 20, and impurities in the water body are reduced. And after the water quality in the first pipeline 10 is qualified, the switch valve is controlled to be opened, so that the water flows to the subsequent pipeline.

Alternatively, both the on-off valve and the water quality detector 103 may be electrically connected to the aforementioned controller, and the controller controls the on-off valve 102 based on the detection result of the water quality detector 103. For example, when the water quality detector 103 detects that the water quality is not acceptable, the controller controls the on-off valve 102 to be closed; when the water quality detector 103 detects that the water quality is qualified, the controller controls the switch valve 102 to be conducted.

In some examples, a magnetic adsorption structure (not shown) is also included on the basis of the embodiment shown in fig. 13. The magnetic attraction structure may be the magnetic attraction structure 40 as described above, and will not be described again.

In some examples, a tapered tube (not shown) is also included on the basis of the embodiment shown in fig. 13. The conical tube may be the conical tube 201 as described above, and will not be described again.

Fig. 14 is another schematic structural view of a water treatment apparatus according to an embodiment of the present disclosure. As shown in fig. 14, in this water treatment apparatus, a filter 81 is further connected in series between the check valve 202 and the anti-scaling tank 203. Illustratively, the filter 81 may be a U-flange filter. By providing the filter 81, the water discharged from the anti-scaling tank 203 is filtered to further reduce impurities in the water body. The filter 81 may have a greater filtering accuracy than the filtering structure 50, for example, the filter 81 may be a 100-300 mesh filter, and it will be appreciated that a higher mesh filter may be selected depending on the requirements for impurities in the water. The filter structure 50 is utilized to perform primary filtration, and the filter 81 is utilized to perform efficient filtration, so that the water body can be captured and filtered by large, medium and small (light and heavy) object blocks under the condition of not increasing the local resistance of the pipeline.

In some examples, the two sides of the filter 81 may be further provided with first service valves 82, and the filter 81 may be isolated by closing the two first service valves 82, thereby facilitating service or even replacement of the filter 81.

In some examples, second service valves 83 may be provided on both sides of the filter structure 50, and by closing both second service valves 83, the filter structure 50 may be isolated, thereby facilitating servicing or even replacement of the filter structure 50.

The embodiment of the disclosure also provides a carbon dioxide energy storage system, which comprises any water quality treatment device shown in fig. 1-14.

Taking the water quality treatment device shown in fig. 10 as an example, in the carbon dioxide energy storage system, by connecting the first pipeline 10 to the second pipeline 20, the second pipeline 20 is connected with the circulating pump 30 in series, and because the second water inlet end of the second pipeline 20 is close to the first water outlet end of the first pipeline 10, the second water outlet end of the second pipeline 20 is close to the first water inlet end of the first pipeline 10, so that the water in the first pipeline 10 can enter from the second water inlet end of the second pipeline 20 under the action of the circulating pump 30 before flowing out from the first water outlet end of the first pipeline 10, and then returns to the first pipeline 10 from the second water outlet end of the second pipeline 20.

By providing the magnetic adsorption structure 40 in the first pipe 10, the magnetic adsorption structure 40 is opposite to the second water inlet end of the second pipe 20, and the magnetic adsorption structure 40 can generate a certain obstruction to water before the water enters the second pipe 20, and adsorb scrap iron in the water to remove the scrap iron in the water. By providing the filtering structure 50 in the second pipe 20, the water flowing through the second pipe 20 is filtered to remove impurities therein that are not adsorbed by the magnetic adsorption structure 40. The second pipe 20 is connected with a drain pipe 60, the drain pipe 60 is connected with a drain valve 70, and the connection between the drain pipe 60 and the second pipe 20 is located between the filtering structure 50 and the second water inlet end of the second pipe 20, so that after the filtering structure 50 filters certain impurities, the drain valve 70 can be opened, and the impurities are discharged through the drain pipe 60 under the drive of water flow. Through circulating water in first pipeline 10, the multiple times in second pipeline 20, the impurity in the water has significantly reduced, be favorable to improving quality of water, have fine capture filter effect to the large granule thing in the water, also have fine capture filter effect to tiny thing piece, the influence to carbon dioxide gas liquid phase energy storage system operation is little during the filtration, under the circumstances that does not increase pipeline local resistance, accomplish the capture filtration of big medium and small (light, heavy) thing piece, and promote circulating water calcium, magnesium ion to be in the free state all the time under neutral, acidic and alkaline environment, can not scale deposit, do not need to soften the processing, when being applied to carbon dioxide energy storage system, the heat exchanger need not to shut down the clearance incrustation scale, guarantee the heat transfer effect of heat exchanger. When the device is applied to a carbon dioxide gas-liquid phase energy storage system, water discharged from the first water outlet end meets the water quality requirement, and enters other pipelines in a pipeline system of the water circulation of the energy storage system, for example, a heat exchanger is used for providing hot water or cold water, so that the heat exchange effect of the long-term operation of the energy storage system is not affected. The application field of the water quality treatment device is not limited to a carbon dioxide gas-liquid phase energy storage system, and the water quality treatment device can be applied to other systems with requirements for impurities in water, a water pipeline (system) of the system is connected with the water quality treatment device, and the water quality treatment device is illustratively shown to be arranged at a bypass of the water pipeline (system), when the water impurities of the bypass reach the standard, water reaching the standard can run in the water pipeline (system) without influencing the pipeline resistance of the water pipeline (system). The water quality treatment device can also be manufactured to be consistent with the standard flange connection size, and the water quality treatment device is installed by detaching a valve from a water pipeline (system) without occupying more positions of the pipeline.

Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The terms "first," "second," "third," and the like in the description and in the claims, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Likewise, the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprising" or "comprises", and the like, is intended to mean that elements or items that are present in front of "comprising" or "comprising" are included in the word "comprising" or "comprising", and equivalents thereof, without excluding other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", "front", "rear", etc. are used merely to denote relative positional relationships, which may also change accordingly when the absolute position of the object to be described changes.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The foregoing description of the preferred embodiments of the present disclosure is provided for the purpose of illustration only, and is not intended to limit the disclosure to the particular embodiments disclosed, but on the contrary, the intention is to cover all modifications, equivalents, alternatives, and alternatives falling within the spirit and principles of the disclosure.

Claims

1. A water treatment apparatus, comprising:

a first conduit (10) having a first water inlet end and a first water outlet end;

a second conduit (20) having a second water inlet end and a second water outlet end, said second water inlet end being in communication with said first conduit (10);

a magnetic adsorption structure (40) at least partially located in the first conduit (10) and opposite the second water inlet end for adsorbing metallic impurities in water;

-a filtering structure (50) located in the second conduit (20) for filtering impurities in the water;

and one end of the drain pipe (60) is communicated with the second pipeline (20), and the joint is positioned between the filtering structure (50) and the second water inlet end.

2. A water treatment apparatus according to claim 1, wherein,

the magnetic adsorption structure (40) comprises a nonmagnetic shell (401) and an electromagnet (402), wherein the electromagnet (402) is positioned in the nonmagnetic shell (401) and detachably connected with the nonmagnetic shell (401), the nonmagnetic shell (401) is connected with the first pipeline (10), the nonmagnetic shell (401) is at least partially positioned in the first pipeline (10), so that the electromagnet (402) is at least partially positioned in the first pipeline (10), and the lower end of the nonmagnetic shell (401) exceeds the lower pipe wall of the first pipeline (10).

3. The water treatment device according to claim 2, wherein the pipe wall of the first pipe (10) is provided with a mounting hole (10 a), the nonmagnetic shell (401) is at least partially inserted into the first pipe through the mounting hole (10 a), and the nonmagnetic shell (401) is in sealing connection with the hole wall of the mounting hole (10 a).

4. The water treatment device according to claim 2, further comprising a conical tube (201), said conical tube (201) communicating said second water inlet end with said first pipe (10), a larger diameter end of said conical tube (201) being connected to said first pipe (10) and opposite to the end of said nonmagnetic shell (401), a larger diameter end of said conical tube (201) being larger than the diameter of said nonmagnetic shell (401).

5. The water treatment apparatus according to any one of claims 1 to 4, wherein the filter structure (50) comprises a filter screen (501) and a differential pressure sensor (502), and two pressure detection ports of the differential pressure sensor (502) are positioned on opposite sides of the filter screen (501).

6. The water treatment device according to any one of claims 1 to 4, wherein the second water inlet end and the second water outlet end are both communicated with the first pipeline (10), the second water inlet end is close to the first water outlet end, the second water outlet end is close to the first water inlet end, the water treatment device further comprises a one-way valve (202) and a circulating pump (30), the one-way valve (202) is connected to the second pipeline (20) in series and is located between the second water outlet end and the filtering structure (50), and the circulating pump (30) is located between the one-way valve (202) and the filtering structure (50).

7. The water treatment device according to claim 6, further comprising an anti-scaling tank (203), the anti-scaling tank (203) being connected in series on the second conduit (20) and being located between the circulation pump (30) and the filtering structure (50), the anti-scaling tank (203) being adapted to inject gaseous carbon dioxide under pressure.

8. The water treatment device according to claim 7, further comprising a water quality detector (103), wherein a detection head of the water quality detector (103) is located within the first pipe (10) and between the magnetic adsorption structure (40) and the first water outlet end.

9. A water treatment apparatus, comprising:

a second pipe (20) having a second water inlet end and a second water outlet end, both of which are in communication with the first pipe (10), and the second water inlet end being adjacent to the first water outlet end and the second water outlet end being adjacent to the first water inlet end;

an anti-scaling tank (203) is connected in series on the second pipeline (20), and the anti-scaling tank (203) is used for injecting pressurized gaseous carbon dioxide.

10. A carbon dioxide gas-liquid phase-change energy storage system, characterized by comprising the water quality treatment device according to any one of claims 1 to 9.