A heating device for high-temperature molten salt energy storage

Abstract

The utility model relates to electric heating technical field discloses a kind of heating device for high-temperature molten salt energy storage, including flow guide elbow pipe and protective housing, flow guide elbow pipe outside is equipped with electric heating tube, and multiple groups of heating plate are embedded and installed on the inner wall of electric heating tube;Multiple groups of air guide cavities are equipped on the inner wall of each group of elbow pipe of electric heating tube and between two groups of heating plate, air guide cavity penetrates the inner wall of electric heating tube, and the outer side of both ends of electric heating tube is respectively equipped with air guide sleeve tube, air guide sleeve tube inside is equipped with the air guide cavity body being communicated with air guide cavity, and the side wall is communicated with heat pipe, and heat pipe other end is worn out protective housing.The utility model has the advantages compared with prior art in that:flow guide elbow pipe and electric heating tube are both serpentine elbow pipe, electric heating tube is composed of multiple groups of independent elbow pipe, multiple groups of heating plate inside each group of elbow pipe integrated heat control, low-temperature molten salt flows in flow guide elbow pipe and carries out heat exchange, improves heating energy storage exchange efficiency;Through high-temperature flue gas, flow guide elbow pipe carries out heat exchange, and reduces heating energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of electric heating technology, specifically to a heating device for high-temperature molten salt energy storage. Background Technology

[0002] Molten salt energy storage technology has advantages such as high energy conversion efficiency, suitability for large-scale energy storage, good economic performance, safety and environmental protection. It has been widely used in solar thermal power generation, heating, comprehensive utilization of wind and solar surplus electricity, and flexible transformation of thermal power plants. Molten salt energy storage requires the extensive use of electric heaters, which are required to have high heating temperature, high power and resistance to molten salt corrosion.

[0003] However, in the existing technology, a molten salt energy storage electric heating device mainly uses the principle of converting electrical energy into heat energy through a high-resistance electric heating alloy to generate heat to heat low-temperature molten salt. The heating method mainly relies on the contact heating of the heating tube. This heating structure is simple, the heating energy storage exchange efficiency is poor, and the energy consumption is high.

[0004] To address the aforementioned technical problems, this application proposes a heating device for high-temperature molten salt energy storage. Utility Model Content

[0005] I. Technical problems to be solved

[0006] The technical problem this invention aims to solve is that the heating method mainly relies on contact heating of the heating tube. This heating structure is simple, has poor heating energy storage and exchange efficiency, and consumes a lot of energy.

[0007] II. Technical Solution

[0008] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows: a heating device for high-temperature molten salt energy storage, including a flow guide bend and a protective shell, wherein the flow guide bend is located inside the protective shell and its two ends extend out of the protective shell respectively, an electric heating tube is sleeved on the outside of the flow guide bend, and multiple sets of heating plates are embedded in the inner wall of the electric heating tube;

[0009] Multiple air guide cavities are provided on the inner wall of each set of bends of the electric heating tube and located between two sets of heating plates. The air guide cavities penetrate the inner wall of the electric heating tube. Air guide sleeves are respectively fitted on the outer sides of both ends of the electric heating tube. The air guide sleeves are provided with air guide cavities that communicate with the air guide cavities, and heat conduction pipes are connected to the side walls. The other end of the heat conduction pipes extends out of the protective shell.

[0010] As an improvement, the electric heating tube is composed of multiple sets of bent tubes, and a sealing sleeve is fitted on the outside of the interface of two sets of bent tubes. Wiring for connecting multiple sets of heating plates is installed inside the sealing sleeve, and a temperature controller connected to multiple sets of wiring is installed on the outer wall of the protective shell.

[0011] As an improvement, sealing rings are installed at both ends of the air guide sleeve, and the sealing rings are sealed to the outer wall of the guide bend.

[0012] As an improvement, the two ends of the guide bend are respectively connected to an inlet connecting pipe and an outlet connecting pipe.

[0013] As an improvement, a base plate is installed at the bottom of the protective shell, and a support leg is installed on the underside of the base plate.

[0014] As an improvement, the lower sidewall of the curved section of the guide bend is connected to a slag discharge pipe, the lower end of which passes through the electric heating tube and the base plate and is fitted with a sealing cap.

[0015] III. Beneficial Effects

[0016] The advantages of this utility model compared with the prior art are as follows:

[0017] 1. Both the flow guide bend and the electric heating tube are serpentine bends. The electric heating tube is composed of multiple independent bends. Multiple heating plates inside each bend are integrated for heat control. Low-temperature molten salt flows inside the flow guide bend for heat exchange, improving the heating and energy storage exchange efficiency.

[0018] 2. The air guide cavity, air guide sleeve and heat conduction pipe inside the electric heating tube send high-temperature flue gas into the inside of the electric heating tube. The high-temperature flue gas exchanges heat with the guide bend, reducing heating energy consumption. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the upper structure of a heating device for high-temperature molten salt energy storage according to the present invention.

[0020] Figure 2 This is a schematic diagram of the lower structure of a heating device for high-temperature molten salt energy storage according to the present invention.

[0021] Figure 3 This is a schematic diagram of the flow guide bend structure of a heating device for high-temperature molten salt energy storage according to this utility model.

[0022] Figure 4 This is a schematic diagram of the electric heating tube structure of a heating device for high-temperature molten salt energy storage according to this utility model.

[0023] Figure 5 This is a schematic diagram of the air guide sleeve structure of a heating device for high-temperature molten salt energy storage according to this utility model.

[0024] As shown in the figure: 1. Guide bend; 2. Inlet connecting pipe; 3. Outlet connecting pipe; 4. Electric heating tube; 5. Heating plate; 6. Sealing sleeve; 7. Air guide cavity; 8. Air guide sleeve; 9. Sealing ring; 10. Heat conduction pipe; 11. Protective shell; 12. Temperature controller; 13. Base plate; 14. Support leg. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0026] Example 1

[0027] As attached Figure 1 Appendix Figure 2 and attached Figure 3 As shown, a heating device for high-temperature molten salt energy storage includes a flow guide bend 1 and a protective shell 11. A base plate 13 is installed at the bottom of the protective shell 11, and a support leg 14 is installed on the lower side of the base plate 13. The support leg 14 supports the base plate 13 and the protective shell 11 by supporting the ground. The flow guide bend 1 is located inside the protective shell 11, and its two ends extend out of the protective shell 11. The two ends of the flow guide bend 1 are respectively connected to an inlet connecting pipe 2 and an outlet connecting pipe 3. The inlet connecting pipe 2 is connected to a feeding device, and the outlet connecting pipe 3 is connected to a receiving device to deliver molten salt to the inside of the flow guide bend 1.

[0028] As attached Figure 1 and attached Figure 4 As shown, an electric heating tube 4 is sleeved on the outside of the flow guide bend 1. The electric heating tube 4 is composed of multiple sets of bends. Multiple sets of heating plates 5 are embedded in the inner wall of each set of bends. A sealing sleeve 6 is sleeved on the outside of the interface between two sets of bends. Wiring connected to multiple sets of heating plates 5 is installed inside the sealing sleeve 6. A temperature controller 12 connected to multiple sets of wiring is installed on the outer wall of the protective shell 11. The heating temperature is input through the temperature controller 12, and the temperature of the heating plate 5 inside each set of bends is independently controlled. The multiple sets of heating plates 5 heat the flow guide bend 1, thereby heating the molten salt inside the flow guide bend 1.

[0029] Example 2

[0030] Based on Example 1, as shown in the appendix Figure 1 Appendix Figure 4 and attached Figure 5As shown, multiple sets of air guide chambers 7 are provided on the inner wall of the electric heating tube 4 and located between the two sets of heating plates 5. The air guide chambers 7 penetrate the inner wall of the electric heating tube 4. Air guide sleeves 8 are respectively fitted on the outer sides of both ends of the electric heating tube 4. Sealing rings 9 are respectively installed at both ends of the air guide sleeves 8. The sealing rings 9 are sealed to the outer wall of the guide bend 1. The air guide sleeve 8 has an air guide cavity that communicates with the air guide chambers 7 inside, and a heat conduction pipe 10 is connected to the side wall. The other end of the heat conduction pipe 10 passes through the protective shell 11. The heat conduction pipe 10 is connected to the industrial high-temperature exhaust pipe, which sends the high-temperature flue gas to the air guide cavity inside the air guide sleeve 8 and to the multiple sets of air guide chambers 7. The flue gas heats the guide bend 1 and the molten salt inside the guide bend 1.

[0031] Example 3

[0032] Based on Embodiment 1 and Embodiment 2, as shown in the appendix Figure 2 and attached Figure 3 As shown, the lower side wall of the curved section of the guide bend 1 is connected to the slag discharge pipe 15. The lower end of the slag discharge pipe 15 passes through the electric heating tube 4 and the base plate 13, and is equipped with a sealing cover 16. The curved section of the guide bend 1 is prone to residual salt accumulation. When cleaning the residual salt, the sealing cover 16 is opened, and the residual salt in the curved section of the guide bend 1 and the inside of the slag discharge pipe 15 is discharged by cleaning tools.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, 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 process, method, article, or apparatus.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

[0035] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A heating device for high-temperature molten salt energy storage, comprising a flow guide bend (1) and a protective outer shell (11), characterized in that: The flow guide bend (1) is located inside the protective shell (11) and both ends protrude from the protective shell (11). An electric heating tube (4) is sleeved on the outside of the flow guide bend (1). Multiple heating plates (5) are embedded in the inner wall of each bend of the electric heating tube (4). Multiple air guide cavities (7) are provided on the inner wall of the electric heating tube (4) and between the two sets of heating plates (5). The air guide cavities (7) penetrate the inner wall of the electric heating tube (4). Air guide sleeves (8) are respectively fitted on the outer sides of both ends of the electric heating tube (4). The air guide sleeves (8) are provided with air guide cavities that communicate with the air guide cavities (7) and heat conduction pipes (10) are connected to the side walls. The other end of the heat conduction pipes (10) extends out of the protective shell (11).

2. The heating device for high-temperature molten salt energy storage according to claim 1, characterized in that: The electric heating tube (4) is composed of multiple sets of bent tubes. A sealing sleeve (6) is fitted on the outside of the interface of two sets of bent tubes. A wiring device connected to multiple sets of heating plates (5) is installed inside the sealing sleeve (6). A temperature controller (12) connected to multiple sets of wiring devices is installed on the outer wall of the protective shell (11).

3. The heating device for high-temperature molten salt energy storage according to claim 1, characterized in that: The air guide sleeve (8) is equipped with sealing rings (9) at both ends, and the sealing rings (9) are sealed to the outer wall of the guide bend (1).

4. A heating device for high-temperature molten salt energy storage according to claim 1, characterized in that: The guide bend (1) is connected to an inlet connecting pipe (2) and an outlet connecting pipe (3) at both ends.

5. A heating device for high-temperature molten salt energy storage according to claim 1, characterized in that: The protective shell (11) has a base plate (13) installed at the bottom, and a support leg (14) is installed on the underside of the base plate (13).

6. A heating device for high-temperature molten salt energy storage according to claim 5, characterized in that: The lower side wall of the curved section of the guide bend (1) is connected to the slag discharge pipe (15). The lower end of the slag discharge pipe (15) passes through the electric heating pipe (4) and the base plate (13) and is equipped with a sealing cap (16).

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