CN221208450U - Oil treatment device and carbon dioxide gas-liquid phase-change energy storage system - Google Patents

Abstract

The disclosure provides an oil treatment device and a carbon dioxide gas-liquid phase-change energy storage system, and belongs to the field of carbon dioxide energy storage. The oil treatment device comprises a first pipeline, a second pipeline, a magnetic adsorption structure, a filtering structure and two first maintenance valves. The first pipeline is provided with a first oil inlet end and a first oil outlet end; the second pipeline is provided with a second oil inlet end and a second oil outlet end, and the second oil 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 oil inlet end and is used for adsorbing metal impurities in the oil liquid; the filtering structure is positioned in the second pipeline; the two first maintenance valves are connected in series on the second pipeline and are arranged at two sides of the filtering structure. Through setting up magnetic adsorption structure in first pipeline, magnetic adsorption structure can produce certain hindrance to fluid to adsorb the iron fillings in the fluid, get rid of the iron fillings in the fluid, set up filtration in the second pipeline, filter the fluid of flowing through the second pipeline, the filtering is wherein not by magnetic adsorption structure absorptive impurity.

Description

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

Technical Field

The present disclosure relates to the field of carbon dioxide energy storage, and in particular to an oil 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 oil 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.

Disclosure of utility model

To solve at least one technical problem described above, embodiments of the present disclosure provide an oil 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 an oil treatment apparatus comprising:

The first pipeline is provided with a first oil inlet end and a first oil outlet end;

The second pipeline is provided with a second oil inlet end and a second oil outlet end, and the second oil 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 oil inlet end, and is used for adsorbing metal impurities in oil;

A filtering structure positioned in the second pipeline and used for filtering impurities in the oil;

The two first maintenance valves are connected in series on the second pipeline and are arranged on two sides of the filtering structure.

Optionally, the second oil inlet end and the second oil outlet end are both communicated with the first pipeline, the second oil inlet end is close to the first oil outlet end, the second oil outlet end is close to the first oil inlet end, the filter further comprises a check valve and a circulating pump, the check valve is connected to the second pipeline in series and is located between the second oil outlet end and the filtering structure, and the circulating pump is located between the check valve and the filtering structure.

Optionally, a filter is further included in series with the second conduit, the filter being located between the filtering structure and the circulation pump.

Optionally, the filter further comprises two second maintenance valves connected in series on the second pipeline, and the two second maintenance valves are arranged on two sides of the filter.

Optionally, the device further comprises an oil quality detector, wherein a detection head of the oil quality detector is positioned in the first pipeline and between the magnetic adsorption structure and the first oil outlet 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 pipe, wherein the conical pipe is communicated with the second oil inlet end and the first pipeline, one end with a larger diameter of the conical pipe 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 pipe is larger than the diameter of the nonmagnetic shell.

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.

In a second aspect, embodiments of the present disclosure also provide a carbon dioxide energy storage system comprising any one of the oil 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) The second pipeline is connected to the side wall of the first pipeline, so that oil in the first pipeline can enter the second pipeline from the second oil inlet end of the second pipeline. Through setting up magnetic adsorption structure in first pipeline, magnetic adsorption structure is relative with the second oil feed end of second pipeline, and fluid before getting into the second pipeline, magnetic adsorption structure can produce certain hindrance to fluid to adsorb the iron fillings in the fluid, get rid of the iron fillings in the fluid.

(2) Through setting up filtration in the second pipeline, the fluid that flows through the second pipeline is filtered, and the impurity of filtering wherein not adsorbed by magnetic adsorption structure. The first maintenance valves are arranged on the two sides of the filtering structure, so that after the filtering structure filters certain impurities, the two first maintenance valves can be closed to maintain or replace the filtering structure, so that accumulated impurities can be removed.

(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 oil 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 oil treatment device is manufactured to be consistent with the standard flange connection size, and the installation of the oil treatment device is completed by detaching a valve, so that the position of an oil pipeline (system) is not occupied.

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 an oil treatment apparatus provided in 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 an oil treatment apparatus provided in an embodiment of the present disclosure;

FIG. 5 is a schematic view of a partial structure of an oil treatment apparatus provided in an embodiment of the present disclosure;

FIG. 6 is a schematic view of a partial structure of an oil treatment apparatus provided in an embodiment of the present disclosure;

FIG. 7 is another schematic view of an oil treatment apparatus provided in an embodiment of the present disclosure;

FIG. 8 is another schematic view of an oil treatment apparatus provided in an embodiment of the present disclosure;

FIG. 9 is another schematic view of an oil treatment apparatus provided in an embodiment of the present disclosure;

FIG. 10 is another schematic view of an oil treatment apparatus provided in an embodiment of the present disclosure;

fig. 11 is another structural schematic diagram of an oil treatment apparatus provided in 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 view of an oil treatment apparatus according to an embodiment of the present disclosure. As shown in fig. 1, the flow direction of the oil is schematically shown by arrows in fig. 1. As shown in fig. 1, the oil treatment apparatus includes a first pipe 10, a second pipe 20, a magnetic adsorption structure 40, a filtering structure 50, and two first service valves 83.

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

The magnetic adsorbing structure 40 is at least partially located in the first conduit 10 opposite the second oil inlet end. The magnetic adsorption structure 40 is used for adsorbing magnetic impurities such as metal impurities in the oil. A filter structure 50 is located in the second conduit 20, the filter structure 50 being used to filter impurities in the oil. The impurities include at least large, medium and small (light, heavy) mass such as stones, sand. Two first service valves 83 are connected in series to the second pipe 20 and are disposed on both sides of the filter structure 50.

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

By attaching the second pipe 20 to the side wall of the first pipe 10, the oil in the first pipe 10 can enter the second pipe 20 from the second oil inlet end of the second pipe 20. By arranging the magnetic adsorption structure 40 in the first pipeline 10, the magnetic adsorption structure 40 is opposite to the second oil inlet end of the second pipeline 20, and before oil enters the second pipeline 20, the magnetic adsorption structure 40 can generate certain obstruction to the oil and adsorb magnetic impurities such as scrap iron in the oil so as to remove the impurities such as scrap iron in the oil. After the oil 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 oil 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 first service valves 83 on both sides of the filter structure 50, after the filter structure 50 filters certain impurities, the two first service valves 83 can be closed to service or replace the filter structure 50, so as to remove accumulated impurities. Thus, large, medium and small (light and heavy) object blocks contained in the oil in the first pipeline 10 are captured and filtered, so that the oil discharged from the first oil outlet end meets the requirements, and the oil is applied to a carbon dioxide gas-liquid phase-change 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 oil 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 at an incline, where the inclined pipe wall is advantageous for collecting large, medium and small (light, heavy) impurities.

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

Moreover, 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 oil 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 structural schematic diagram of an oil treatment apparatus provided in an embodiment of the present disclosure. As shown in fig. 4, the oil treatment apparatus further includes a tapered pipe 201, and the tapered pipe 201 communicates the second oil 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 as to facilitate the oil containing impurities which are not adsorbed by the magnetic adsorption structure 40 to enter the conical pipe 201 along the nonmagnetic shell 401, the conical pipe 201 is funnel-shaped, and the larger-diameter end faces the magnetic adsorption structure 40. The oil forms a vortex under the action of gravity and gravitational force at the conical pipe 201, and impurities in the oil more easily enter the second pipeline 20 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, and 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 fall into the conical tube 201 and then be blocked by the filtering structure 50.

Fig. 5 is a schematic partial structure of an oil 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 partial structure of an oil 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 oil, and as 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 across the filter 501 reaches a certain level, i.e. impurities accumulate to a certain extent at the filter 501, the first service valve 83 can be closed and the filter structure 50 can be treated.

Fig. 7 is another structural schematic diagram of an oil treatment apparatus provided in an embodiment of the present disclosure. As shown in fig. 7, in this example, the second oil inlet end and the second oil outlet end of the second pipe 20 are both communicated with the first pipe 10, and the second oil inlet end is close to the first oil outlet end, and the second oil outlet end is close to the first oil inlet end, as compared to the oil treatment apparatus shown in fig. 4. Further, in this example, the oil treatment device further comprises a check valve 202 and a circulation pump 30, the check valve 202 being connected in series to the second conduit 20 and being located between the second oil 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 circulating pump 30 in series with the second pipe 20, since the second oil inlet end of the second pipe 20 is close to the first oil outlet end of the first pipe 10, the second oil outlet end of the second pipe 20 is close to the first oil inlet end of the first pipe 10, and thus the oil in the first pipe 10 can enter from the second oil inlet end of the second pipe 20 under the action of the circulating pump 30 before flowing out from the first oil outlet end of the first pipe 10, and then returns to the first pipe 10 from the second oil outlet end of the second pipe 20. By circulating between the second pipe 20 and the first pipe 10 a plurality of times, impurities in the oil can be further reduced, and the quality of the oil discharged from the first oil outlet end of the first pipe 10 can be improved.

Fig. 8 is another structural schematic diagram of an oil treatment apparatus provided in an embodiment of the present disclosure. As shown in fig. 8, in comparison with the oil treatment apparatus shown in fig. 7, in this example, the oil treatment apparatus further includes a filter 81 connected in series to the second pipe 20, the filter 81 being located between the filtering structure 50 and the circulation pump 30. By providing the filter 81, the oil is further filtered to further reduce impurities in the oil.

Illustratively, the filter 81 may be a U-flange filter. The filter 81 may have a filtering accuracy greater than that of the filtering structure 50, and for example, the filter 81 may be a 100-300 mesh filter.

Fig. 9 is another structural schematic diagram of an oil treatment apparatus provided in an embodiment of the present disclosure. As shown in fig. 9, in comparison with the oil treatment apparatus shown in fig. 8, in this example, the oil treatment apparatus further includes two second service valves 82 connected in series to the second pipe 20, the two second service valves 82 being disposed at both sides of the filter 81. By closing the two second service valves 82, the filter 81 can be isolated, thereby facilitating service and even replacement of the filter 81.

Illustratively, the first service valve 83 and the second service valve 82 may each be electrically controlled valves, which may operate under the control of a controller.

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

Illustratively, the impurity detector 103 is a detector for detecting insoluble impurities in oil.

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

Fig. 11 is another structural schematic diagram of an oil treatment apparatus provided in an embodiment of the present disclosure. The direction of flow of the oil is schematically shown by arrows in fig. 11. As shown in fig. 11, the oil 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 oil outlet end. The detection head of the impurity detector 103 is located between the magnetic adsorption structure 40 and the on-off valve 102.

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

Alternatively, both the on-off valve 102 and the impurity 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 impurity detector 103. For example, when the impurity detector 103 detects that the oil is not acceptable, the controller controls the on-off valve 102 to be closed; when the impurity detector 103 detects that the oil is qualified, the controller controls the switch valve 102 to be turned on.

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. 11, flanges 101 are further connected to two ends of the first pipe 10, and the flanges 101 are provided to facilitate connection of the first pipe 10 to other pipes in the pipe system for circulating oil.

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 tightness and avoid oil 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 oil inlet of the circulating pump 30 is connected to one end of one of the two adjacent sections of pipeline, and the oil 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 oil inlet end of the second pipeline 20 is close to the first oil outlet end of the first pipeline 10, the second oil outlet end of the second pipeline 20 is close to the first oil inlet end of the first pipeline 10, oil in the first pipeline 10 can enter from the second oil inlet end of the second pipeline 20 under the action of the circulating pump 30 before flowing out from the first oil outlet end of the first pipeline 10, and then returns to the first pipeline 10 from the second oil outlet end of the second pipeline 20 for next circulation.

Through setting up magnetic adsorption structure 40 in first pipeline 10, magnetic adsorption structure 40 is relative with the second oil feed end of second pipeline 20, and fluid before getting into second pipeline 20, magnetic adsorption structure 40 can produce certain hindrance to the fluid to adsorb the iron fillings in the fluid, get rid of the iron fillings in the fluid. By providing the filter structure 50 in the second pipe 20, the oil flowing through the second pipe 20 is filtered to remove impurities therein that are not adsorbed by the magnetic adsorption structure 40.

By providing the first service valves 83 on both sides of the filter structure 50, after the filter structure 50 filters certain impurities, the two first service valves 83 can be closed to service or replace the filter structure 50, so as to remove accumulated impurities. Through circulating the fluid in first pipeline 10, second pipeline 20 many times, the impurity in the fluid has significantly reduced, is favorable to improving the quality of oil.

As shown in fig. 11, the wall of the first pipe 10 has a mounting hole 10a, and the mounting hole 10a is opposite to the second oil 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 oil in the first pipe 10 passes through the nonmagnetic shell 401, impurities such as rust in the oil, which can be adsorbed by the electromagnet 402, are adsorbed to the surface of the nonmagnetic shell 401 and gather on the surface of the nonmagnetic shell 401, and do not continue to advance with the oil. The front and rear sides of the nonmagnetic shell 401 are spaced from the inner wall of the first pipe 10, the space is small and smaller than the diameter of sand particles, and only the oil is contained to flow through the front and rear sides of the nonmagnetic shell 401. The diameter of the second oil inlet end is larger than the diameter of the large particles, and the oil containing the large, medium and small (light and heavy) particles is blocked by the magnetic adsorption structure 40 and enters the second pipeline 20 for filtering under the action of dead weight through the second oil inlet end.

In addition, due to the isolation of the nonmagnetic shell 401, the electromagnet 402 can be more conveniently maintained, such as repaired or replaced, without shutting off the oil in the first pipeline 10, and without affecting the normal operation of the energy storage system.

As shown in fig. 11, the oil treatment apparatus further includes a tapered pipe 201, the tapered pipe 201 communicating the second oil inlet end and the first pipe 10, and an end of the tapered pipe 201 having a larger diameter is connected to the first pipe 10 opposite to an end of the nonmagnetic casing 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 oil forms a vortex under the action of gravity and gravitational force at the conical pipe 201, and impurities in the oil more easily enter the second pipeline 20 under the action of the vortex and are filtered by the filtering structure 50 in the second pipeline 20.

As shown in fig. 11, the oil 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 oil 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, the oil in the second pipeline 20 can only flow from the second oil inlet end to the second oil outlet end of the second pipeline 20 through the filter structure 50, so that the oil in the first pipeline 10 is prevented from flowing into the second pipeline 20 from the second oil outlet end of the second pipeline 20 under the action of pressure, and flows into the first oil outlet end from the second oil 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 oil inlet end of the check valve 202, damage to the circulation pump 30 when the oil pressure at the second oil outlet end of the second pipe 20 is too high can also be avoided.

As shown in fig. 11, the oil treatment apparatus further includes an impurity detector 103. The detection head of the impurity detector 103 is located in the first pipe 10, and the detection head of the impurity detector 103 is located between the magnetic adsorption structure 40 and the first oil outlet end of the first pipe 10.

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

The embodiment of the disclosure also provides a carbon dioxide gas-liquid phase energy storage system, which comprises any one of the oil treatment devices shown in fig. 1-11.

Taking the oil treatment device shown in fig. 11 as an example, in the carbon dioxide energy storage system, by communicating the first pipeline 10 with the second pipeline 20, the second pipeline 20 is connected with the circulating pump 30 in series, and because the second oil inlet end of the second pipeline 20 is close to the first oil outlet end of the first pipeline 10, the second oil outlet end of the second pipeline 20 is close to the first oil inlet end of the first pipeline 10, the oil in the first pipeline 10 can enter from the second oil inlet end of the second pipeline 20 under the action of the circulating pump 30 before flowing out from the first oil outlet end of the first pipeline 10, and then returns to the first pipeline 10 from the second oil outlet end of the second pipeline 20.

Through setting up magnetic adsorption structure 40 in first pipeline 10, magnetic adsorption structure 40 is relative with the second oil feed end of second pipeline 20, and fluid before getting into second pipeline 20, magnetic adsorption structure 40 can produce certain hindrance to the fluid to adsorb the iron fillings in the fluid, get rid of the iron fillings in the fluid. By providing the filter structure 50 in the second pipe 20, the oil flowing through the second pipe 20 is filtered to remove impurities therein that are not adsorbed by the magnetic adsorption structure 40. The first maintenance valves 83 are connected to both sides of the filtering structure 50, so that after the filtering structure 50 filters certain impurities, the two first maintenance valves 83 can be closed to maintain or replace the filtering structure 50, so as to remove accumulated impurities. Thus, large, medium and small (light and heavy) object blocks contained in the oil in the first pipeline 10 are captured and filtered, so that the oil discharged from the first oil outlet end meets the requirements, and the oil is applied to a carbon dioxide gas-liquid phase-change energy storage system, and the heat exchange effect of the long-term operation of the energy storage system is not influenced. Through with fluid in first pipeline 10, second pipeline 20 multiple circulation, the impurity in the fluid has significantly reduced, is favorable to improving the quality of fluid, has fine capture filter effect to the large granule thing in the fluid, also has fine capture filter effect to tiny thing piece, and is little to carbon dioxide gas liquid phase liquid energy storage system operation influence during the filtration, under the circumstances that does not increase pipeline local resistance, accomplishes the capture filtration of big medium and small (light, heavy) thing piece. When the device is applied to a carbon dioxide gas-liquid phase-change energy storage system, oil discharged from the first oil outlet end meets the requirement, and enters other pipelines in a pipeline system of the oil circulation of the energy storage system, for example, a heat exchanger is used for providing hot oil, so that the heat exchange effect of the long-term operation of the energy storage system is not affected. The application field of the oil treatment device is not limited to a carbon dioxide gas-liquid phase energy storage system, and the oil treatment device can be applied to other systems with requirements on impurity content in oil, an oil pipeline (system) of the system is connected with the oil treatment device, and the oil treatment device is illustratively shown to be arranged at a bypass of the oil pipeline (system), when the oil impurity of the bypass reaches the standard, the oil reaching the standard can run in the oil pipeline (system) without influencing the pipeline resistance of the oil pipeline (system). The oil treatment device can also be manufactured to be consistent with the standard flange connection size, and the installation of the oil treatment device is completed by detaching a valve on an oil pipeline (system), so that the position of the pipeline is not occupied.

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 (10)

1. An oil treatment apparatus, comprising:

a first pipe (10) having a first oil inlet end and a first oil outlet end;

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

A magnetic adsorption structure (40) at least partially located in the first pipeline (10) and opposite to the second oil inlet end, for adsorbing metal impurities in oil;

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

Two first maintenance valves (83) are connected in series on the second pipeline (20) and are arranged on two sides of the filtering structure (50).

2. The oil treatment device according to claim 1, wherein the second oil inlet end and the second oil outlet end are both in communication with the first pipe (10), and the second oil inlet end is adjacent to the first oil outlet end, and the second oil outlet end is adjacent to the first oil inlet end, and further comprising a one-way valve (202) and a circulation pump (30), the one-way valve (202) being connected in series on the second pipe (20) and being located between the second oil outlet end and the filter structure (50), and the circulation pump (30) being located between the one-way valve (202) and the filter structure (50).

3. An oil treatment device according to claim 2, further comprising a filter (81) connected in series to the second conduit (20), the filter (81) being located between the filter structure (50) and the circulation pump (30).

4. An oil treatment device according to claim 3, further comprising two second service valves (82) connected in series to the second pipe (20), the two second service valves (82) being arranged on both sides of the filter (81).

5. The oil treatment device according to claim 2, further comprising an oil quality detector (103), a detection head of the oil quality detector (103) being located within the first conduit (10) and between the magnetic adsorption structure (40) and the first oil outlet end.

6. An oil treatment apparatus according to any one of claims 1 to 5, 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).

7. An oil treatment device according to claim 6, characterized in that the wall of the first pipeline (10) is provided with a mounting hole (10 a), the nonmagnetic shell (401) is at least partially inserted into the first pipeline through the mounting hole (10 a), and the nonmagnetic shell (401) is in sealing connection with the wall of the mounting hole (10 a).

8. The oil treatment device according to claim 6, further comprising a conical tube (201), said conical tube (201) communicating said second oil 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 an end of said nonmagnetic shell (401), a larger diameter end of said conical tube (201) being larger than a diameter of said nonmagnetic shell (401).

9. An oil treatment device according to any one of claims 1-5, wherein the filter structure (50) comprises a filter screen (501) and a differential pressure sensor (502), two pressure detection ports of the differential pressure sensor (502) being located on opposite sides of the filter screen (501).

10. A carbon dioxide gas-liquid phase-change energy storage system comprising the oil treatment apparatus according to any one of claims 1 to 9.