Molten salt solar heat exchanger

Abstract

The utility model discloses a fused salt solar heat exchanger, and belongs to the technical field of solar heat exchangers, the fused salt solar heat exchanger is characterized by comprising a heat exchanger body, the heat exchanger body comprises a fused salt heat preservation mechanism, and the fused salt heat preservation mechanism comprises a fused salt box, a flow guide pipe, a heat preservation box and an anti-solidification assembly; the area adjusting mechanism comprises a first motor, a turntable and a rotating rod; a housing; the heat exchange tube bundle is connected with the heat preservation box; wherein the molten salt box is connected with the heat preservation box through the flow guide pipe, the flow guide pipe is connected with the heat exchange pipe bundle, the anti-solidification assembly makes contact with the flow guide pipe, the first motor is connected with the rotating rod, the rotating discs are arranged at the two ends of the rotating rod, the rotating discs are rotationally connected with the shell, and the heat exchange pipe bundle is connected with the rotating discs. According to the fused salt solar heat exchanger, heat exchange is conducted through the fused salt heat preservation technology, the energy storage effect is good, and the heat exchange efficiency is high.

Description

Technical Field

[0001] This application belongs to the technical field of solar heat exchangers, and particularly relates to a molten salt solar heat exchanger. Background Technology

[0002] Molten salts possess advantages such as high latent heat, high energy density, low subcooling, good thermal stability, a wide heat storage and release temperature range, and low cost. Therefore, they are widely used as heat storage media in solar thermal utilization.

[0003] A Chinese patent with publication number CN115164618B discloses a multi-heat source solar heat exchanger with adjustable heat exchange area. The heat exchanger includes a shell with a central baffle plate along its left-right direction, dividing the shell into two cavities. Two movable baffle plates are installed in each of the front and rear cavities, connected to the central baffle plate via a rotating structure. A fixed tube sheet is installed on each of the left and right sides of the shell, dividing the interior of the shell into three parts: a left cavity, a shell-side cavity, and a right cavity. A heat exchange tube bundle is evenly distributed between the two fixed tube sheets, connecting the left and right cavities. The central baffle plate divides the shell-side cavity into front and rear sections, referred to as the first shell-side and the second shell-side, respectively. The first shell-side is the solar heat exchange side, and the second shell-side is the boiler heat exchange side. The inlets and outlets of the solar heat exchange side and the boiler heat exchange side are opposite.

[0004] The aforementioned invention can improve the heat exchange efficiency of heat exchangers, reduce the impact of solar energy fluctuations, and improve the stability of heat exchange systems. However, this invention does not utilize molten salt insulation technology, resulting in poor energy storage and low heat exchange efficiency. Utility Model Content

[0005] The purpose of this application is to address the aforementioned technical problems by providing a molten salt solar heat exchanger that uses molten salt insulation technology for heat exchange, resulting in better energy storage and higher heat exchange efficiency.

[0006] This application provides a molten salt solar heat exchanger, including a heat exchanger body, the heat exchanger body comprising:

[0007] Molten salt insulation mechanism, including molten salt tank, flow guide pipe, insulation box and anti-freezing components;

[0008] The area adjustment mechanism includes a first motor, a turntable, and a rotating rod;

[0009] case;

[0010] The heat exchange tube bundle is connected to the insulation box;

[0011] The molten salt tank and the insulation tank are connected by a guide pipe, the guide pipe is connected to the heat exchange tube bundle, the anti-condensation component is in contact with the guide pipe, the first motor is connected to the rotating rod, the turntable is placed at both ends of the rotating rod, the turntable is rotatably connected to the shell, and the heat exchange tube bundle is connected to the turntable.

[0012] In this technical solution, a molten salt insulation mechanism, an area adjustment mechanism, a shell, and a heat exchange tube bundle are installed in the heat exchanger body. The molten salt insulation mechanism includes a molten salt tank, a guide pipe, an insulation box, and an anti-condensation component. The molten salt tank and the insulation box are connected by a guide pipe, which is connected to the heat exchange tube bundle, which in turn is connected to the insulation box. When the heat exchanger body stores heat using molten salt, the molten salt in the molten salt tank flows along the guide pipe into the heat exchange tube bundle. The heat exchange tube bundle is directly exposed to sunlight, thereby continuously increasing the temperature of the molten salt inside the heat exchange tube bundle. After the temperature of the molten salt inside the heat exchange tube bundle rises to a certain level, the high-temperature molten salt falls into the insulation box along the guide pipe. The insulation box has excellent heat insulation performance, facilitating heat storage in the heat exchanger body. The heat exchanger body uses molten salt insulation technology for energy storage, improving heat exchange efficiency. The anti-condensation component is in contact with the guide pipe and prevents solidification from occurring on the guide pipe. The molten salt inside solidifies to prevent the flow pipe from being affected by the solidification of the molten salt, thus ensuring the heat preservation effect of the molten salt insulation mechanism. The area adjustment mechanism is equipped with a first motor, a turntable, and a rotating rod. The first motor is connected to the rotating rod, and the turntable is located at both ends of the rotating rod. The turntable is rotatably connected to the shell, and the heat exchange tube bundle is connected to the turntable. When the solar energy fluctuates, the stability of the heat exchange system will be affected. When the solar energy fluctuation is at its peak, the first motor is controlled to work. The first motor drives the turntable and the rotating rod to rotate together. The flow pipe and the heat exchange tube bundle are flexibly connected, which allows the heat exchange tube bundle to rotate with the turntable. This allows some of the heat exchange tube bundle to be shielded by the shell, and some of the heat exchange tube bundle to be unaffected by the solar energy. When the solar energy fluctuation is at its trough, the first motor is controlled to reverse, so that all heat exchange tube bundles can be affected by the solar energy, thereby ensuring the stability of the heat exchange system.

[0013] Furthermore, the molten salt tank is equipped with a second motor and stirring blades;

[0014] The second motor is connected to the stirring blade and is located at the bottom of the molten salt tank.

[0015] In this technical solution, a second motor and stirring blades are installed in the molten salt tank and connected to each other. The second motor is located at the bottom of the molten salt tank. The heat exchanger body performs heat exchange operations by controlling the second motor to drive the stirring blades to rotate. The stirring blades can stir the molten salt in the molten salt tank, preventing the molten salt from accumulating and affecting its fluidity. This ensures that the molten salt can enter the heat exchange tube bundle and the insulation box along the guide pipe, thereby improving the insulation effect of the heat exchanger body.

[0016] Furthermore, the anti-coagulation component includes:

[0017] Water storage tank, including heating element;

[0018] The heat-conducting plate is in contact with the flow guide tube;

[0019] Temperature sensor, which controls the operation of heating wire.

[0020] In this technical solution, a water storage tank with heating wire, a heat-conducting plate, and a temperature sensor are installed in the anti-condensation component. The heat-conducting plate is in contact with the guide pipe, and the temperature sensor controls the operation of the heating wire. When the temperature sensor detects that the temperature at the guide pipe is low, it controls the heating wire to operate. The heating wire can raise the temperature inside the water storage tank, thereby causing the water in the water storage tank to evaporate into hot steam. The hot steam can raise the temperature of the heat-conducting plate, and the heat-conducting plate then transfers the temperature of the hot steam to the guide pipe, raising the temperature of the guide pipe. This prevents the molten salt inside the guide pipe from condensing due to low temperature, ensuring the fluidity of the molten salt and facilitating the heat preservation work of the molten salt insulation mechanism.

[0021] Furthermore, the area adjustment mechanism includes:

[0022] The third motor, including the lead screw;

[0023] A sliding partition, which is slidably connected to the housing;

[0024] The sliding partition is fitted with the lead screw.

[0025] In this technical solution, a third motor with a lead screw and a sliding partition are set in the area adjustment mechanism, and the sliding partition is slidably connected to the shell. The sliding partition cooperates with the lead screw. When the heat exchanger body adjusts the heat exchange tube bundle's heating area, the third motor is first controlled to work. The third motor drives the lead screw to rotate, causing the sliding partition to move at the lead screw. After the sliding partition moves, the area adjustment mechanism controls the first motor to rotate. After the first motor finishes working, the third motor is controlled to rotate in the opposite direction, so that the sliding partition is reset. The sliding partition can shield part of the heat exchange tube bundle, thereby keeping the heat exchange system stable.

[0026] Furthermore, the sliding partition is coated with a heat-insulating coating.

[0027] In this technical solution, a heat-insulating coating is applied to the sliding partition. The heat-insulating coating has excellent heat insulation effect, thereby giving the sliding partition excellent heat insulation effect. The sliding partition shields the heat exchange tube bundle, and due to its excellent heat insulation effect, the impact of solar energy on the heat exchange tube bundle is greatly reduced.

[0028] Furthermore, the heat exchanger body is also provided with a drain trough;

[0029] The sewage trough is located at the bottom of the shell.

[0030] In this technical solution, by setting a drain trough in the heat exchanger body and placing the drain trough at the bottom of the shell, the wastewater generated by the heat exchanger body during operation can be discharged along the drain trough, reducing the impact of wastewater on the internal components of the heat exchanger body, thereby extending the service life of the heat exchanger body.

[0031] The beneficial effects of this application are:

[0032] 1. When the heat exchanger body stores heat through molten salt, the molten salt in the molten salt tank flows along the guide pipe into the heat exchange tube bundle. The heat exchange tube bundle is directly exposed to sunlight, which continuously increases the temperature of the molten salt inside the heat exchange tube bundle. After the temperature of the molten salt inside the heat exchange tube bundle rises to a certain level, the high-temperature molten salt falls into the insulation box along the guide pipe. The insulation box has excellent heat insulation performance, which facilitates heat storage in the heat exchanger body. The heat exchanger body uses molten salt insulation technology to store energy, which improves the heat exchange efficiency.

[0033] 2. When the temperature sensor detects that the temperature at the guide tube is low, it controls the heating wire to work. The heating wire can raise the temperature inside the water tank, thereby causing the water in the water tank to evaporate into hot steam. The hot steam can raise the temperature of the heat conduction plate, and the heat conduction plate can then transfer the temperature of the hot steam to the guide tube, raising the temperature of the guide tube and preventing the molten salt inside the guide tube from condensing due to the low temperature, thus ensuring the fluidity of the molten salt.

[0034] 3. When the solar energy fluctuation is at its peak, the first motor is controlled to work. The first motor drives the turntable and the rotating rod to rotate together. The guide tube and the heat exchange tube bundle are flexibly connected, which makes it easy for the heat exchange tube bundle to rotate with the turntable. This allows some of the heat exchange tube bundle to be shielded by the shell, and some of the heat exchange tube bundle to be unaffected by the solar energy. When the solar energy fluctuation is at its trough, the first motor is controlled to reverse so that all heat exchange tube bundles can be affected by the solar energy, thus ensuring the stability of the heat exchange system. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the structure of a molten salt solar heat exchanger according to this application;

[0036] Figure 2 This is a schematic diagram of the molten salt insulation mechanism;

[0037] Figure 3 This is a schematic diagram of the internal structure of the shell;

[0038] In the attached figures, the following labels are used: 100, heat exchanger body; 110, shell; 120, heat exchange tube bundle; 130, drain tank; 200, molten salt insulation mechanism; 210, molten salt tank; 211, second motor; 212, stirring blade; 220, guide pipe; 230, insulation box; 240, anti-condensation component; 241, water storage tank; 242, heat conduction plate; 243, temperature sensor; 244, heating wire; 300, area adjustment mechanism; 310, first motor; 320, turntable; 330, rotating rod; 340, third motor; 341, lead screw; 350, sliding partition. Detailed Implementation

[0039] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0040] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0041] The embodiments of this application are described in detail below with reference to the accompanying drawings, through specific examples and application scenarios.

[0042] Example 1:

[0043] like Figure 1-3 As shown in the figure, this application provides a molten salt solar heat exchanger, including a heat exchanger body 100, the heat exchanger body 100 comprising:

[0044] The molten salt insulation mechanism 200 includes a molten salt tank 210, a flow guide pipe 220, an insulation box 230, and an anti-freezing component 240;

[0045] The area adjustment mechanism 300 includes a first motor 310, a turntable 320, and a rotating rod 330;

[0046] Casing 110;

[0047] The heat exchange tube bundle 120 is connected to the insulation box 230;

[0048] The molten salt tank 210 and the heat preservation tank 230 are connected by a guide pipe 220, the guide pipe 220 is connected to the heat exchange tube bundle 120, the anti-condensation component 240 is in contact with the guide pipe 220, the first motor 310 is connected to the rotating rod 330, the turntable 320 is placed at both ends of the rotating rod 330, the turntable 320 is rotatably connected to the shell 110, and the heat exchange tube bundle 120 is connected to the turntable 320.

[0049] By incorporating a molten salt insulation mechanism 200, an area adjustment mechanism 300, a shell 110, and a heat exchange tube bundle 120 within the heat exchanger body 100, the molten salt insulation mechanism 200 includes a molten salt tank 210, a guide pipe 220, an insulation tank 230, and an anti-condensation component 240. The molten salt tank 210 and the insulation tank 230 are connected via the guide pipe 220, which is also connected to the heat exchange tube bundle 120. The heat exchange tube bundle 120 is connected to the insulation tank 230. When the heat exchanger body 100 stores heat using molten salt, the molten salt in the molten salt tank 210 flows along the guide pipe 220... The molten salt inside the heat exchanger bundle 120 flows through the flow tube 220. The heat exchanger bundle 120 is directly exposed to sunlight, continuously raising the temperature of the molten salt inside. Once the temperature of the molten salt inside the heat exchanger bundle 120 reaches a certain level, the high-temperature molten salt falls along the flow tube 220 into the insulation box 230. The insulation box 230 has excellent heat insulation performance, facilitating heat storage in the heat exchanger body 100. The heat exchanger body 100 uses molten salt insulation technology for energy storage, improving heat exchange efficiency. The anti-condensation component 240 is in contact with the flow tube 220 and prevents the molten salt from flowing into the heat exchanger bundle 120. The molten salt inside the flow tube 220 solidifies, preventing the flow tube 220 from being affected by the solidification of the molten salt and ensuring the heat preservation effect of the molten salt insulation mechanism 200. The area adjustment mechanism 300 is equipped with a first motor 310, a turntable 320, and a rotating rod 330. The first motor 310 is connected to the rotating rod 330, and the turntable 320 is located at both ends of the rotating rod 330. The turntable 320 is rotatably connected to the shell 110, and the heat exchange tube bundle 120 is connected to the turntable 320. When solar energy fluctuates, the stability of the heat exchange system will be affected. When the fluctuation is at its peak, the first motor 310 is controlled to work. The first motor 310 drives the turntable 320 and the rotating rod 330 to rotate together. The guide pipe 220 and the heat exchange tube bundle 120 are flexibly connected, which makes it easy for the heat exchange tube bundle 120 to rotate with the turntable 320. This allows part of the heat exchange tube bundle 120 to be shielded by the shell 110, so that part of the heat exchange tube bundle 120 will not be affected by solar energy. When the solar energy fluctuation is at its trough, the first motor 310 is controlled to reverse so that all heat exchange tube bundles 120 can be affected by solar energy, thereby ensuring the stability of the heat exchange system.

[0050] Furthermore, the molten salt tank 210 is equipped with a second motor 211 and a stirring blade 212;

[0051] The second motor 211 is connected to the stirring blade 212, and the second motor 211 is placed at the bottom of the molten salt tank 210.

[0052] By setting a second motor 211 and a stirring blade 212 in the molten salt tank 210, and connecting the second motor 211 and the stirring blade 212, and placing the second motor 211 at the bottom of the molten salt tank 210, the heat exchanger body 100 performs heat exchange operations, controlling the second motor 211 to work. The second motor 211 drives the stirring blade 212 to rotate, and the stirring blade 212 can stir the molten salt in the molten salt tank 210, preventing the molten salt from accumulating together and affecting its fluidity. This ensures that the molten salt can enter the heat exchange tube bundle 120 and the insulation box 230 along the guide pipe 220, thereby improving the insulation effect of the heat exchanger body 100.

[0053] Furthermore, the anti-coagulation component 240 includes:

[0054] Water storage tank 241, including heating wire 244;

[0055] The heat-conducting plate 242 is in contact with the flow guide tube 220;

[0056] Temperature sensor 243 controls the operation of heating wire 244.

[0057] By incorporating a water storage tank 241 with a heating wire 244, a heat-conducting plate 242, and a temperature sensor 243 in the anti-condensation component 240, with the heat-conducting plate 242 in contact with the guide pipe 220, and the temperature sensor 243 controlling the operation of the heating wire 244, when the temperature sensor 243 detects that the temperature at the guide pipe 220 is low, the heating wire 244 is activated, which raises the temperature inside the water storage tank 241, causing the water inside the water storage tank 241 to evaporate into hot steam. The hot steam raises the temperature of the heat-conducting plate 242, which then transfers the temperature of the hot steam to the guide pipe 220, raising the temperature of the guide pipe 220 and preventing the molten salt inside the guide pipe 220 from condensing due to low temperature, thus ensuring the fluidity of the molten salt and facilitating the heat preservation work of the molten salt insulation mechanism 200.

[0058] Example 2:

[0059] like Figure 1-3 As shown, this application provides a molten salt solar heat exchanger, which, in addition to the technical solutions of the above embodiments, also has the following technical features. The area adjustment mechanism 300 includes:

[0060] The third motor 340 includes a lead screw 341;

[0061] The sliding partition 350 is slidably connected to the housing 110;

[0062] The sliding partition 350 is engaged with the lead screw 341.

[0063] By incorporating a third motor 340 with a lead screw 341 and a sliding partition 350 in the area adjustment mechanism 300, and with the sliding partition 350 slidably connected to the housing 110 and cooperating with the lead screw 341, when the heat exchanger body 100 adjusts the heat-receiving area of ​​the heat exchange tube bundle 120, the third motor 340 is first controlled to operate, which drives the lead screw 341 to rotate, causing the sliding partition 350 to move at the lead screw 341. After the sliding partition 350 moves, the area adjustment mechanism 300 controls the first motor 310 to rotate. After the first motor 310 has finished operating, the third motor 340 is controlled to rotate in the opposite direction, causing the sliding partition 350 to reset. The sliding partition 350 can shield part of the heat exchange tube bundle 120, thereby keeping the heat exchange system stable.

[0064] Furthermore, the sliding partition 350 is coated with a heat-insulating coating.

[0065] By coating the sliding partition 350 with a thermal insulation coating, which has excellent thermal insulation effect, the sliding partition 350 has excellent thermal insulation effect. The sliding partition 350 shields the heat exchange tube bundle 120, and due to its excellent thermal insulation effect, the impact of solar energy on the heat exchange tube bundle 120 is greatly reduced.

[0066] Furthermore, the heat exchanger body 100 is also provided with a drain trough 130;

[0067] The sewage trough 130 is located at the bottom of the housing 110.

[0068] By providing a drain trough 130 in the heat exchanger body 100 and placing the drain trough 130 at the bottom of the shell 110, the wastewater generated by the heat exchanger body 100 during operation can be discharged along the drain trough 130, reducing the impact of wastewater on the internal components of the heat exchanger body 100 and thus extending the service life of the heat exchanger body 100.

[0069] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0070] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A molten salt solar heat exchanger, comprising a heat exchanger body (100), characterized in that, The heat exchanger body (100) includes: Molten salt insulation mechanism (200) includes molten salt tank (210), flow guide pipe (220), insulation box (230) and anti-freezing component (240); The area adjustment mechanism (300) includes a first motor (310), a turntable (320), and a rotating rod (330); Shell (110); A heat exchange tube bundle (120) is connected to an insulation box (230); The molten salt tank (210) and the heat preservation tank (230) are connected by a guide pipe (220), the guide pipe (220) is connected to the heat exchange tube bundle (120), the anti-condensation component (240) is in contact with the guide pipe (220), the first motor (310) is connected to the rotating rod (330), the turntable (320) is placed at both ends of the rotating rod (330), the turntable (320) is rotatably connected to the shell (110), and the heat exchange tube bundle (120) is connected to the turntable (320).

2. The molten salt solar heat exchanger according to claim 1, characterized in that, The molten salt tank (210) is equipped with a second motor (211) and stirring blades (212); The second motor (211) is connected to the stirring blade (212), and the second motor (211) is placed at the bottom of the molten salt tank (210).

3. A molten salt solar heat exchanger according to claim 2, characterized in that, The anti-coagulation component (240) includes: A water storage tank (241) includes a heating element (244); A heat-conducting plate (242) is in contact with a flow guide tube (220); Temperature sensor (243) controls the operation of heating wire (244).

4. A molten salt solar heat exchanger according to claim 3, characterized in that, The area adjustment mechanism (300) includes: The third motor (340) includes a lead screw (341); A sliding partition (350) is slidably connected to the housing (110); The sliding partition (350) is engaged with the lead screw (341).

5. A molten salt solar heat exchanger according to claim 4, characterized in that, The sliding partition (350) is coated with a heat-insulating coating.

6. A molten salt solar heat exchanger according to claim 5, characterized in that, The heat exchanger body (100) is also provided with a drain trough (130); The drain trough (130) is located at the bottom of the housing (110).

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