Efficient automatic salt melting system

Abstract

The invention relates to the field of energy equipment, in particular to an efficient automatic salt melting system. The efficient automatic salt melting system comprises a hot salt tank, a cold salt tank, a first heat exchanger and a molten salt circulating pipe, a transverse pipe is arranged in the hot salt tank, and a plurality of control pipes are communicated between the transverse pipe and the molten salt circulating pipe; the device further comprises a plurality of control rods, the control rods freely penetrate into the control pipe from the top of the hot salt tank, and a driving mechanism matched with the control rods is arranged on the hot salt tank. And the first heat exchanger is matched with a power generation mechanism. According to the efficient automatic salt melting system, through cooperation of the hot salt tank, the cold salt tank, the first heat exchanger, the molten salt circulating pipe, the transverse pipe, the control pipe, the control rod, the driving mechanism, the power generation mechanism and the like, in the heating process of the hot salt tank, the control rod can be driven to move up and down by controlling the driving mechanism, so that the heating time of molten salt in the hot salt tank is changed; the molten salt passing speed is changed, and therefore the molten salt heat exchange efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of energy equipment, and in particular to a high-efficiency automatic molten salt system. Background Art

[0002] As an important equipment in energy equipment, molten salt tanks are widely used in nuclear reaction power generation and photovoltaic power generation in the prior art. At present, molten salt tanks have low efficiency due to the lack of control mechanisms. In addition, traditional molten salt tanks do not have anti-solidification devices for molten salt. Once the molten salt temperature is too low during use, it will solidify together. If it is placed for a long time, it will accumulate more and more, which is easy to damage the tank body. It is necessary to regularly check and clean the molten salt residue in time. However, the traditional cleaning methods are manual grinding and wet cleaning. The former is to rub the surface with molten salt residue with friction media such as sandpaper and scrapers. Although mechanical grinding can effectively remove molten salt when processing molten salt in nuclear reactor tanks, it will produce obvious grinding marks, resulting in uneven grinding surface and affecting the quality of nuclear reactor tanks; during the processing, it is difficult to handle the gaps in the tank body, and some joint gaps have residual residues; this purely manual method is not conducive to automation, industrialization and mass production. The main principle of the latter is to use the dissolution of molten salt by organic solvents to separate the molten salt from the surface of the tank body to achieve the purpose of cleaning. However, since the nuclear reactor tank is easily exploded when it is melted with water under high temperature, it is generally used at room temperature and in small quantities, which makes the cleaning efficiency low and the corrosion strong. In addition, after the molten salt tank is used for heat exchange steam power generation, there is still a lot of heat in the pipeline, and the utilization efficiency of this part of heat is low.

[0003] Therefore, it is necessary to design an efficient automatic molten salt system. Summary of the invention

[0004] In view of the defects in the prior art, the present invention provides a high-efficiency automatic molten salt system.

[0005] The technical solution adopted by the present invention is: a high-efficiency automatic molten salt system, including a hot salt tank, a cold salt tank, a first heat exchanger and a molten salt circulation pipe, a cross pipe is arranged inside the hot salt tank, and a plurality of control pipes are connected between the cross pipe and the molten salt circulation pipe; it also includes a plurality of control rods, which freely penetrate into the control pipes from the top of the hot salt tank, and a driving mechanism matched with the control rods is arranged on the hot salt tank; the first heat exchanger is matched with a power generation mechanism.

[0006] To better implement the present invention, the driving mechanism includes a driving motor installed on the hot salt tank, the rotating shaft of the driving motor is connected to a threaded rod through a coupling, a slider is connected to the top of the control rod, and the threaded rod is threadedly matched with the slider.

[0007] In order to better realize the present invention, the first heat exchanger is matched with the second heat exchanger through the first circulation heat exchange tube, and the power generation mechanism is matched with the second heat exchanger.

[0008] In order to better realize the present invention, the power generation mechanism includes a second circulation heat exchange tube matched with a second heat exchanger, the second circulation heat exchange tube is matched with a steam turbine, and the steam turbine is matched with a generator.

[0009] In order to better realize the present invention, the steam turbine is coaxially matched with a first compressor, and the first compressor is connected to an intercooler.

[0010] In order to better implement the present invention, the first compressor is coaxially matched with the second compressor, and the intercooler is respectively connected to the first compressor and the second compressor.

[0011] In order to better realize the present invention, the steam turbine and the second heat exchanger are equipped with a recuperator, and the first compressor is connected to the recuperator.

[0012] In order to better realize the present invention, a precooler is provided between the recuperator and the second compressor.

[0013] In order to better realize the present invention, a first molten salt pump close to the hot salt tank and a second molten salt pump close to the cold salt tank are arranged on the molten salt circulation pipe; a first circulation pump is arranged on the first circulation heat exchange pipe, and a second circulation pump is arranged on the second circulation heat exchange pipe.

[0014] In order to better realize the present invention, it also includes a purification branch pipe connected to the molten salt circulation pipe and matched with a corresponding switching valve. The purification branch pipe is provided with a molten salt purifier for purifying the molten salt.

[0015] The beneficial effects of the present invention are embodied in that the high-efficiency automatic molten salt system of the present invention, through the cooperation of the hot salt tank, the cold salt tank, the first heat exchanger, the molten salt circulation pipe, the cross pipe, the control pipe, the control rod, the driving mechanism and the power generation mechanism, during the heating process of the hot salt tank, the control rod can be driven up and down by controlling the driving mechanism, thereby changing the heating time of the molten salt in the hot salt tank, that is, changing the speed at which the molten salt passes, thereby improving the heat exchange efficiency of the molten salt.

[0016] The driving mechanism includes a driving motor installed on the hot salt tank, the rotating shaft of the driving motor is connected to a threaded rod through a coupling, a slider is connected to the top of the control rod, and the threaded rod is threadedly matched with the slider. After such a design, when the driving motor rotates forward, it drives the threaded rod to rotate forward, allowing the slider to slide downward relatively, so that the threaded rod moves downward, which plays a role in slowing down the flow of molten salt and slowing down the flow speed of molten salt; when the driving motor rotates reversely, it drives the threaded rod to rotate reversely, allowing the slider to slide upward relatively, so that the threaded rod moves upward, loosens the obstruction to the molten salt, and can greatly improve the heat exchange efficiency of the molten salt.

[0017] The first heat exchanger is matched with the second heat exchanger through the first circulation heat exchange tube, and the power generation mechanism is matched with the second heat exchanger. After such design, the first heat exchanger obtains heat from the molten salt circulation tube and exchanges heat to the second heat exchanger through the first circulation heat exchange tube.

[0018] The power generation mechanism includes a second circulation heat exchange tube matched with a second heat exchanger, a steam turbine matched with the second circulation heat exchange tube, and a generator matched with the steam turbine. After such a design, the second circulation heat exchange tube obtains heat from the second heat exchanger and transmits it to the steam turbine, allowing the steam to drive the steam turbine to rotate, thereby driving the generator to generate electricity.

[0019] The steam turbine is coaxially matched with a first compressor, and the first compressor is connected to an intercooler. After such a design, the first compressor can recover the heat in the intercooler and add the heat to the second circulating heat exchange pipe, thereby improving the heat utilization rate.

[0020] The first compressor is coaxially matched with the second compressor, and the intercooler is connected to the first compressor and the second compressor respectively. After such a design, the second compressor is used in conjunction with the first compressor to recover as much heat as possible, greatly improving the heat utilization rate.

[0021] The steam turbine and the second heat exchanger are equipped with a recuperator, and the first compressor is connected to the recuperator. After the steam turbine generates electricity, part of the waste heat passes through the recuperator and enters the second circulation heat exchange pipe.

[0022] A precooler is provided between the recuperator and the second compressor. After such a design, the precooler can absorb part of the heat of the recuperator for precooling.

[0023] The molten salt circulation pipe is provided with a first molten salt pump close to the hot salt tank and a second molten salt pump close to the cold salt tank; the first circulation heat exchange pipe is provided with a first circulation pump, and the second circulation heat exchange pipe is provided with a second circulation pump. With this design, the use of the first molten salt pump and the second molten salt pump can make the molten salt flow smoothly and improve the heat exchange efficiency. The use of the first circulation pump and the second circulation pump can make the first circulation heat exchange pipe and the second circulation heat exchange pipe exchange heat smoothly and improve the heat exchange efficiency.

[0024] It also includes a purification branch pipe connected to the molten salt circulation pipe, and is equipped with a corresponding switching valve. The purification branch pipe is provided with a molten salt purifier for purifying the molten salt. When the molten salt is used for a period of time, when agglomerates appear, which makes the heat exchange efficiency of the molten salt low, the agglomerates can be removed by the molten salt purifier, and fresh molten salt can be added to the molten salt purifier, and then the new molten salt is allowed to enter the molten salt circulation pipe to improve the heat exchange efficiency of the molten salt. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0026] Figure 1 A structural schematic diagram of a high-efficiency automatic molten salt system of the present invention; Figure 2 A schematic diagram of the structure of the cooperation between the driving mechanism and the control rod of the high-efficiency automatic molten salt system of the present invention; In the attached drawings, 1 is a hot salt tank, 2 is a first heat exchanger, 3 is a cold salt tank, 4 is a molten salt circulation pipe, 5 is a cross pipe, 6 is a control pipe, 7 is a control rod, 8 is a molten salt purifier, 9 is a second heat exchanger, 10 is a steam turbine, 11 is a generator, 12 is a first compressor, 13 is a second compressor, 14 is an intercooler, 15 is a precooler, 16 is a recuperator, 17 is a first circulation heat exchange pipe, 18 is a second circulation heat exchange pipe, 19 is a slider, 20 is a drive motor, 21 is a threaded rod, 22 is a first molten salt pump, 23 is a second molten salt pump, 24 is a first circulation pump, 25 is a second circulation pump, and 26 is a switching valve. DETAILED DESCRIPTION

[0027] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention. In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all the embodiments. The components of the embodiments of the present disclosure described and shown in the drawings here can be arranged and designed in various different configurations.

[0028] In the description of the present disclosure, it should be noted that the orientation or positional relationship indicated by the terms "upper", "inner", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the disclosed product is usually placed when in use, and is only for the convenience of describing the present disclosure and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present disclosure. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present disclosure, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0030] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art in the field to which the present invention relates.

[0031] Example: like Figure 1 , Figure 2 As shown, the efficient automatic molten salt system of the present invention comprises a hot salt tank 1, a cold salt tank 3, a first heat exchanger 2 and a molten salt circulation pipe 4, a transverse pipe 5 is arranged inside the hot salt tank 1, and a plurality of control pipes 6 are connected between the transverse pipe 5 and the molten salt circulation pipe 4; it also comprises a plurality of control rods 7, the control rods 7 freely penetrate into the control pipe 6 from the top of the hot salt tank 1, and a driving mechanism cooperating with the control rods 7 is arranged on the hot salt tank 1; the first heat exchanger 2 is equipped with a power generation mechanism. The efficient automatic molten salt system of the present invention, through the cooperation of the hot salt tank 1, the cold salt tank 3, the first heat exchanger 2, the molten salt circulation pipe 4, the transverse pipe 5, the control pipe 6, the control rod 7, the driving mechanism and the power generation mechanism, the hot salt tank 1 can drive the control rod 7 to move up and down by controlling the driving mechanism during the heating process, thereby changing the heating time of the molten salt in the hot salt tank 1, that is, changing the speed at which the molten salt passes, thereby improving the heat exchange efficiency of the molten salt.

[0032] As a preferred embodiment, the driving mechanism includes a driving motor 20 installed on the hot salt tank 1, the rotating shaft of the driving motor 20 is connected to a threaded rod 21 through a coupling, a slider 19 is connected to the top of the control rod 7, and the threaded rod 21 is threadedly matched with the slider 19. In this embodiment, the driving mechanism includes a driving motor 20 installed on the hot salt tank 1, the rotating shaft of the driving motor 20 is connected to a threaded rod 21 through a coupling, a slider 19 is connected to the top of the control rod 7, and the threaded rod 21 is threadedly matched with the slider 19. After such a design, when the driving motor 20 rotates forward, it drives the threaded rod 21 to rotate forward, allowing the slider 19 to slide downward relative to achieve the downward movement of the threaded rod 21, which plays a role in slowing down the flow of molten salt and slowing down the flow speed of molten salt; when the driving motor 20 rotates in the reverse direction, it drives the threaded rod 21 to rotate in the reverse direction, allowing the slider 19 to slide upward relative to achieve the upward movement of the threaded rod 21, loosening the obstruction to the molten salt, and can greatly improve the heat exchange efficiency of the molten salt.

[0033] As a preferred embodiment, the first heat exchanger 2 is matched with the second heat exchanger 9 through the first circulation heat exchange tube 17, and the power generation mechanism is matched with the second heat exchanger 9. In this embodiment, the first heat exchanger 2 is matched with the second heat exchanger 9 through the first circulation heat exchange tube 17, and the power generation mechanism is matched with the second heat exchanger 9. After such a design, the first heat exchanger 2 obtains heat from the molten salt circulation tube 4 and exchanges heat to the second heat exchanger 9 through the first circulation heat exchange tube 17.

[0034] As a preferred embodiment, the power generation mechanism includes a second circulation heat exchange pipe 18 matched with the second heat exchanger 9, the second circulation heat exchange pipe 18 is matched with a steam turbine 10, and the steam turbine 10 is matched with a generator 11. In this embodiment, the power generation mechanism includes a second circulation heat exchange pipe 18 matched with the second heat exchanger 9, the second circulation heat exchange pipe 18 is matched with a steam turbine 10, and the steam turbine 10 is matched with a generator 11. After such a design, the second circulation heat exchange pipe 18 obtains heat from the second heat exchanger 9 and transmits it to the steam turbine 10, allowing the steam to drive it to rotate, thereby driving the generator 11 to generate electricity.

[0035] As a preferred embodiment, the steam turbine 10 is coaxially matched with a first compressor 12, and the first compressor 12 is connected to an intercooler 14. In this embodiment, the steam turbine 10 is coaxially matched with a first compressor 12, and the first compressor 12 is connected to an intercooler 14. After such a design, the first compressor 12 can recover the heat in the intercooler 14 and add the heat to the second circulation heat exchange pipe 18, thereby improving the heat utilization rate.

[0036] As a preferred embodiment, the first compressor 12 is coaxially matched with the second compressor 13, and the intercooler 14 is respectively connected to the first compressor 12 and the second compressor 13. In this embodiment, the first compressor 12 is coaxially matched with the second compressor 13, and the intercooler 14 is respectively connected to the first compressor 12 and the second compressor 13. After such a design, the use of the second compressor 13 in conjunction with the first compressor 12 can recover as much heat as possible, greatly improving the heat utilization rate.

[0037] As a preferred embodiment, the steam turbine 10 and the second heat exchanger 9 are equipped with a recuperator 16, and the first compressor 12 is connected to the recuperator 16. In this embodiment, the steam turbine 10 and the second heat exchanger 9 are equipped with a recuperator 16, and the first compressor 12 is connected to the recuperator 16. With this design, part of the waste heat after the steam turbine 10 generates electricity passes through the recuperator 16 and enters the second circulation heat exchange pipe 18.

[0038] As a preferred embodiment, a precooler 15 is provided between the recuperator 16 and the second compressor 13. In this embodiment, a precooler 15 is provided between the recuperator 16 and the second compressor 13. With this design, the precooler 15 can absorb part of the heat of the recuperator 16 for precooling.

[0039] As a preferred embodiment, a first molten salt pump 22 close to the hot salt tank and a second molten salt pump 23 close to the cold salt tank 3 are provided on the molten salt circulation pipe 4; a first circulation pump 24 is provided on the first circulation heat exchange pipe 17, and a second circulation pump 25 is provided on the second circulation heat exchange pipe 18. In this embodiment, a first molten salt pump 22 close to the hot salt tank and a second molten salt pump 23 close to the cold salt tank 3 are provided on the molten salt circulation pipe 4; a first circulation pump 24 is provided on the first circulation heat exchange pipe 17, and a second circulation pump 25 is provided on the second circulation heat exchange pipe 18. After such a design, the use of the first molten salt pump 22 and the second molten salt pump 23 can make the molten salt flow smoothly and improve the heat exchange efficiency. The use of the first circulation pump 24 and the second circulation pump 25 can make the first circulation heat exchange pipe 17 and the second circulation heat exchange pipe 18 exchange heat smoothly and improve the heat exchange efficiency.

[0040] As a preferred embodiment, it also includes a purification branch connected to the molten salt circulation pipe 4, and is equipped with a corresponding switching valve 26, and a molten salt purifier 8 for purifying the molten salt is provided on the purification branch. In this embodiment, it also includes a purification branch connected to the molten salt circulation pipe 4, and is equipped with a corresponding switching valve 26, and a molten salt purifier 8 for purifying the molten salt is provided on the purification branch. When designed in this way, when the molten salt is used for a period of time and agglomerates, which makes the heat exchange efficiency of the molten salt low, the agglomerates can be removed by the molten salt purifier 8, and fresh molten salt can be added to the molten salt purifier 8, and then the new molten salt is allowed to enter the molten salt circulation pipe to improve the heat exchange efficiency of the molten salt.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A high-efficiency automatic molten salt system, comprising a hot salt tank (1), a cold salt tank (3), a first heat exchanger (2) and a molten salt circulation pipe (4), characterized in that: A transverse tube (5) is arranged inside the hot salt tank (1), and a plurality of control tubes (6) are connected between the transverse tube (5) and the molten salt circulation tube (4); a plurality of control rods (7) are also included, and the control rods (7) freely penetrate into the control tubes (6) from the top of the hot salt tank (1), and a driving mechanism cooperating with the control rods (7) is arranged on the hot salt tank (1); the first heat exchanger (2) is equipped with a power generation mechanism.

2. The high-efficiency automatic molten salt system according to claim 1, characterized in that: The driving mechanism comprises a driving motor (20) mounted on a hot salt tank (1), the rotating shaft of the driving motor (20) being connected to a threaded rod (21) via a coupling, a slider (19) being connected to the top of the control rod (7), and the threaded rod (21) being threadably matched with the slider (19).

3. The high-efficiency automatic molten salt system according to claim 2, characterized in that: The first heat exchanger (2) is matched with the second heat exchanger (9) via a first circulating heat exchange tube (17), and the power generation mechanism is matched with the second heat exchanger (9).

4. The high-efficiency automatic molten salt system according to claim 3 is characterized in that: The power generation mechanism comprises a second circulation heat exchange tube (18) matched with a second heat exchanger (9), a steam turbine (10) matched with the second circulation heat exchange tube (18), and a generator (11) matched with the steam turbine (10).

5. The high-efficiency automatic molten salt system according to claim 4 is characterized in that: The steam turbine (10) is coaxially matched with a first compressor (12), and the first compressor (12) is connected to an intercooler (14).

6. The high-efficiency automatic molten salt system according to claim 5, characterized in that: The first compressor (12) is coaxially matched with the second compressor (13), and the intercooler (14) is respectively connected to the first compressor (12) and the second compressor (13).

7. The high-efficiency automatic molten salt system according to claim 6, characterized in that: The steam turbine (10) and the second heat exchanger (9) are equipped with a recuperator (16), and the first compressor (12) is connected to the recuperator (16).

8. The high-efficiency automatic molten salt system according to claim 7, characterized in that: A precooler (15) is provided between the recuperator (16) and the second compressor (13).

9. The high-efficiency automatic molten salt system according to claim 8, characterized in that: A first molten salt pump (22) close to the hot salt tank and a second molten salt pump (23) close to the cold salt tank (3) are arranged on the molten salt circulation pipe (4); a first circulation pump (24) is arranged on the first circulation heat exchange pipe (17), and a second circulation pump (25) is arranged on the second circulation heat exchange pipe (18).

10. The high-efficiency automatic molten salt system according to claim 1, characterized in that: It also includes a purification branch pipe connected to the molten salt circulation pipe (4) and matched with a corresponding switching valve (26). The purification branch pipe is provided with a molten salt purifier (8) for purifying the molten salt.

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