Sensible heat-latent heat composite modular sulfur heat storage equipment

Abstract

The invention discloses sensible heat-latent heat composite modular sulfur heat storage equipment. A sulfur heat storage unit comprises a tube box, a tube plate, a sulfur storage tube and an electric heater. The tube plate divides the interior of the tube box into a sulfur collecting area and a heat exchange area; the sulfur storage pipe is arranged in the heat exchange area of the pipe box, the bottom of the sulfur storage pipe is closed, and the top of the sulfur storage pipe is in butt joint with the pipe hole. A plurality of baffle plates are arranged in a heat exchange area of the tube box from top to bottom, so that a snakelike flow channel is formed in the heat exchange area, the sulfur storage tube penetrates through the baffle plates, and heat removal medium inlets / outlets are respectively formed in two ends, corresponding to the snakelike flow channel, of the side wall of the tube box; the sulfur storage pipe is filled with sulfur, and a heating part of the electric heater is arranged in the liquid storage pipe and is in contact with the sulfur. Sulfur is adopted as a heat storage medium, the problem that the sensible heat energy storage temperature fluctuation range is large is solved, latent heat / sensible heat composite heat storage is achieved, the highest temperature position of sulfur reaches 700 DEG C through control over the temperature and pressure in the heat storage module, and the energy storage density is improved.

Description

Technical Field

[0001] The invention relates to the technical field of heat storage equipment, and in particular to a sensible heat-latent heat composite modular sulfur heat storage equipment. Background Art

[0002] As an important form of energy storage technology, heat storage technology plays a vital role in the fields of solar thermal power generation, off-peak electricity heat storage, waste heat recovery, etc. According to different heat storage principles, it can be divided into three types: sensible heat storage, latent heat storage and thermochemical energy storage.

[0003] Latent heat energy storage: Latent heat energy storage is the storage and release of energy through the absorption and release of energy by the phase change of the energy storage medium. The huge changes in various physical properties of the material during the phase change process make its practical application in engineering very difficult.

[0004] Thermochemical energy storage: Thermochemical energy storage is mainly based on a reversible thermochemical reaction, which stores and releases energy through the endothermic and exothermic reaction of the reversible reaction. Although thermochemical heat storage has a high heat storage density, it is unsafe and the heat storage process is uncontrollable, which seriously affects its promotion and application.

[0005] Sensible heat storage: Sensible heat storage refers to a heat storage technology that uses the temperature change of the material itself to store and release heat. At present, in the field of large-scale high-temperature heat storage, the sensible heat storage of materials is generally used. The widely used molten salt high-temperature heat storage, thermal oil high-temperature heat storage, concrete high-temperature heat storage, etc. all use the sensible heat of the material to store heat to achieve the purpose of heat storage, such as reference 1.

[0006] Reference 1: Chinese patent document with publication number CN105423795A

[0007] Reference 1 records a molten salt heat storage device, including a molten salt heat storage furnace, an oil storage tank, a plate heat exchanger, and an insulated water storage tank. The molten salt heat storage furnace includes a furnace body and vertical pipes for encapsulating molten salt arranged in an equilateral triangle or hexagonal pattern inside the furnace body, and an electric heating belt is wrapped around the outer wall of the vertical pipe; the furnace body is filled with heat transfer oil as a heat exchange fluid; the oil storage tank is connected to the molten salt heat storage furnace for storing heat transfer oil; the molten salt heat storage furnace is connected to the plate heat exchanger, and the plate heat exchanger is connected to the insulated water storage tank. The molten salt heat storage device uses molten salt as a heat storage medium, does not require flow, does not have a molten salt pump, has a simple structure, and is less corrosive; heat exchange is through traditional high-temperature heat transfer oil; the cost is lower; the vertical pipes encapsulating the molten salt are arranged in a special way, so that the heating is uniform, the efficiency is higher, the structure is reasonable, the efficiency is high, the environment is stable, and the safety and reliability are reasonable.

[0008] However, sensible heat storage also faces some problems in application. For example, the commonly used thermal storage materials have low energy storage density, large heat loss and large output temperature fluctuations. Summary of the invention

[0009] The purpose of the present invention is to solve the above-mentioned technical problems existing in the prior art and to provide a sensible heat-latent heat composite modular sulfur thermal storage device. Sulfur is used as the heat storage medium, which not only solves the problem of large temperature fluctuation of sensible heat energy storage, but also realizes the composite heat storage of latent heat / sensible heat. By controlling the temperature and pressure in the heat storage module, the maximum temperature of sulfur can reach 700°C, thereby improving the energy storage density.

[0010] In order to solve the deficiencies of the above technical problems, the technical solution adopted by the present invention is: a sensible heat-latent heat composite modular sulfur heat storage device, including a heat exchanger and a sulfur heat storage module, the sulfur heat storage module includes a plurality of sulfur heat storage units connected in parallel / in series, the heat exchanger has a heat release medium inlet and a heat release medium outlet, the heat release medium outlet of the heat exchanger is connected to a circulation pump through a pipeline, the output pipeline of the circulation pump is respectively connected to the heat medium inlets of a plurality of sulfur heat storage units through a branch pipe, and the heat medium outlets of the plurality of sulfur heat storage units are connected to the heat medium inlet of the heat exchanger through a branch pipe;

[0011] The sulfur heat storage unit comprises a tube box, a tube sheet, a sulfur storage tube and an electric heater. The tube sheet divides the interior of the tube box into an upper sulfur collection area and a lower heat exchange area, and a plurality of tube holes are evenly distributed on the tube sheet.

[0012] The sulfur storage pipe is placed in the heat exchange area of ​​the pipe box, and each pipe hole is correspondingly provided with a sulfur storage pipe. The bottom of the sulfur storage pipe is closed, and the top thereof is butted with the pipe hole, so that the inside of the sulfur storage pipe is connected with the sulfur collection area. The inside of the sulfur storage pipe is filled with thermal storage material sulfur. The heating part of the electric heater is placed in the liquid storage pipe and in contact with the thermal storage material sulfur. The bottom of the sulfur storage pipe is provided with an anti-vibration assembly, and the anti-vibration assembly includes a guide sleeve and a guide column. The guide sleeve and the guide column are respectively fixed to the bottom of the pipe box and the sulfur storage pipe, and the lower end of the guide column is inserted into the guide sleeve;

[0013] A plurality of baffles are arranged from top to bottom in the heat exchange area of ​​the pipe box to form a serpentine flow channel in the heat exchange area. The sulfur storage pipe passes through the baffles, and heat medium inlets / outlets are respectively arranged at both ends of the serpentine flow channel corresponding to the side wall of the pipe box.

[0014] As a further optimization of a sensible heat-latent heat composite modular sulfur heat storage device of the present invention: the heat exchange area of ​​the pipe box is divided into multiple heat exchange areas by a vertical partition, each heat exchange area is provided with a baffle, the flow channels of the multiple heat exchange areas are connected in series, and the two ends of the corresponding flow channels of the pipe box are respectively provided with a medium inlet / outlet.

[0015] As a further optimization of a sensible heat-latent heat composite modular sulfur heat storage device of the present invention: the heat exchange area of ​​the pipe box is divided into four heat exchange areas by a cross partition, each heat exchange area is provided with a baffle, the flow channels of the four heat exchange areas are connected in series, and medium inlets / outlets are respectively provided at both ends of the corresponding flow channels of the pipe box.

[0016] As a further optimization of the sensible heat-latent heat composite modular sulfur thermal storage device of the present invention: the outer wall of the sulfur storage tube is provided with fins.

[0017] As a further optimization of the sensible heat-latent heat composite modular sulfur thermal storage device of the present invention: a pressure gauge for monitoring the pressure of the sulfur sink area is provided on the pipe cover of the pipe box.

[0018] As a further optimization of the sensible heat-latent heat composite modular sulfur thermal storage device of the present invention: the electric heater is an electric heating rod, the lower end of the electric heating rod passes through the pipe cover of the pipe box and is placed in the sulfur storage pipe.

[0019] As a further optimization of the sensible heat-latent heat composite modular sulfur thermal storage device of the present invention: the heat medium inlet branch pipe of the pipe box is provided with a regulating valve, and the heat medium outlet branch pipe of the pipe box is provided with a temperature detection element.

[0020] As a further optimization of the sensible heat-latent heat composite modular sulfur heat storage device of the present invention: at least three baffles are arranged in the heat exchange area.

[0021] As a further optimization of the sensible heat-latent heat composite modular sulfur thermal storage device of the present invention: the pipe box is provided with a thermal insulation layer.

[0022] As a further optimization of the sensible heat-latent heat composite modular sulfur thermal storage device of the present invention: the material of the thermal insulation layer is glass fiber.

[0023] The present invention has the following beneficial effects:

[0024] 1. The heat storage device of the present invention uses sulfur as the heat storage medium. Sulfur has a high temperature (500-700°C), is cheaper than molten salt, has a high heat transfer coefficient compared to solid heat storage, and has a higher heat storage capacity per unit volume.

[0025] 2. The heat storage device of the present invention is modular in design. The individual heat storage modules are more compact and have stronger pressure bearing capacity. The modules can be freely combined in parallel or series and can be expanded later. With temperature control, flexible adjustment and switching can be performed to ensure stable heat output. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the sulfur thermal storage device of the present invention;

[0027] Figure 2It is a schematic diagram of the internal structure of a single heat storage unit in the heat storage device of the present invention;

[0028] Figure 3 It is a schematic structural diagram of a single heat storage unit (with a cross partition) in the heat storage device of the present invention;

[0029] Markings in the figure:

[0030] 1. Pipe box;

[0031] 2. Tube sheet;

[0032] 3. Sulfur storage pipe;

[0033] 4. Electric heater;

[0034] 5. Sulfur collection area;

[0035] 6. Heat exchange area;

[0036] 7. Baffle;

[0037] 8. Anti-vibration components;

[0038] 801, guide column;

[0039] 802, guide sleeve;

[0040] 9. Cross partition;

[0041] 10. Fins;

[0042] 11. Pressure gauge;

[0043] 12. Regulating valve;

[0044] 13. Temperature detection element;

[0045] 14. Heat exchanger;

[0046] 15. Circulation pump. DETAILED DESCRIPTION

[0047] In order to better understand the present invention, the content of the present invention is further explained below in conjunction with embodiments, but the content of the present invention is not limited to the following embodiments.

[0048] like Figure 1 As shown, a sensible heat-latent heat composite modular sulfur thermal storage device includes a heat exchanger 14 and a sulfur thermal storage module. The sulfur thermal storage module includes two sulfur thermal storage units, and the two sulfur thermal storage units are connected in parallel.

[0049] The heat exchanger 14 has a heat releasing medium inlet and a heat releasing medium outlet. The heat releasing medium outlet of the heat exchanger 14 is connected to the circulation pump 15 through a pipeline. The output pipeline of the circulation pump 15 is respectively connected to the heat medium inlets of multiple sulfur thermal storage units through branch pipes. The heat medium outlets of multiple sulfur thermal storage units are connected to the heat medium inlet of the heat exchanger 14 through branch pipes.

[0050] A regulating valve 12 is provided on each of the heat medium inlet branch pipes of the pipe box 1 , and a temperature detection element 13 is provided on each of the heat medium outlet branch pipes of the pipe box 1 .

[0051] The overall structural design of the sulfur heat storage device mainly covers two key components: the heat exchanger 14 and the sulfur heat storage module. Among them, the sulfur heat storage module includes two sulfur heat storage units, and these two sulfur heat storage units are connected in parallel. This parallel structure has many advantages. On the one hand, it can increase the heat extraction or heat storage capacity of the entire sulfur heat storage module to a certain extent, so that the system has stronger adaptability when dealing with different heat demand or heat supply scenarios; on the other hand, when one of the sulfur heat storage units fails or needs maintenance, the other unit can still work normally, thereby ensuring the reliability and stability of the operation of the entire sulfur heat storage device, and will not cause the paralysis of the entire system due to problems in local units.

[0052] The heat exchanger 14 has two key fluid interfaces, namely, a heat release medium inlet and a heat release medium outlet. From the perspective of the medium flow path, the heat release medium outlet of the heat exchanger 14 is connected to the circulation pump 15 through a specially laid pipeline. The circulation pump 15 serves as the power source of the entire fluid circulation system, and its output pipeline is connected to the heat medium inlets of multiple sulfur thermal storage units through a series of branch pipes. This connection method ensures that the circulation pump 15 can deliver fluids of appropriate pressure and flow to each sulfur thermal storage unit so as to extract heat from the sulfur thermal storage unit. The heat medium outlets of multiple sulfur thermal storage units are collected through corresponding branch pipes and finally connected to the heat medium inlet of the heat exchanger 14, thus forming a complete and closed heat medium circulation loop. In this loop, after the fluid exchanges heat with other media in the heat exchanger 14, it enters the sulfur thermal storage unit to extract heat through the drive of the circulation pump 15, and then returns to the heat exchanger 14, and so on and so forth, realizing efficient heat transfer and utilization, and meeting the heat exchange function requirements of the entire sulfur thermal storage device.

[0053] At the same time, a regulating valve 12 is provided on the heat medium inlet branch of the pipe box 1. These regulating valves 12 can flexibly and accurately control the flow of the heat medium entering the pipe box 1 according to the actual operating conditions and requirements. For example, when the temperature of the sulfur thermal storage unit is too high or too low, the flow of the heat medium can be adjusted by adjusting the opening of the regulating valve 12, thereby controlling the heat extraction rate, so that the sulfur thermal storage unit can stably operate within a suitable temperature range, and avoid various problems caused by too fast or too slow heat extraction. At the same time, temperature detection elements 13 are provided on the heat medium outlet branch of the pipe box 1. These temperature detection elements 13 can monitor the temperature information of the heat medium flowing out of the pipe box 1 in real time and accurately, and transmit these data to the relevant control system. Based on these temperature data, the operator or the control system can timely understand the operating status of the sulfur thermal storage unit, so as to make corresponding decisions, such as adjusting the speed of the circulating pump 15, the opening of the regulating valve 12, etc., so as to ensure that the entire sulfur thermal storage device is always in an efficient, safe and stable operating state.

[0054] like Figure 2 and 3 As shown, the sulfur thermal storage unit includes a tube box 1, a tube sheet 2, a sulfur storage tube 3 and an electric heater 4.

[0055] Among them, the structure of the pipe box 1 is preferably a square box. The square box has clear edges and corners, and can be easily positioned with other equipment or infrastructure during assembly. In contrast, irregularly shaped heat storage units are more complicated to position, and may require more measurements and adjustments to ensure the accuracy of the installation position. When multiple sulfur heat storage units need to be assembled together, the square shape enables them to be arranged closely. Because the sides of the square are straight, the sides of adjacent heat storage units fit together to achieve a compact assembly layout. When the heat storage system needs to be expanded and the number of heat storage units is increased, the advantages of the square box are obvious. On a plane, the square heat storage unit can be easily expanded in the form of an array. In addition to plane expansion, the square box is also conducive to three-dimensional expansion. Multiple square heat storage units can be stacked to build a multi-layer heat storage system. Moreover, during the expansion process, the square heat storage unit is easier to integrate with the existing heat storage system. Whether it is a pipeline system, a control system or a supporting structure, the square box can better adapt to the existing layout and interface standards.

[0056] The tube sheet 2 is horizontally arranged in the tube box 1, and the tube sheet 2 divides the interior of the tube box 1 into an upper sulfur collection area 5 and a lower heat exchange area 6. The size of the sulfur collection area 5 and the heat exchange area 6 can be adjusted by the position of the tube sheet 2. In this embodiment, the tube sheet 2 is arranged near the cover of the tube box 1, that is, the heat exchange area 6 is significantly larger than the sulfur collection area 5. A plurality of tube holes are evenly distributed on the tube sheet 2, and the tube sheet 2 and the tube box 1 are welded together.

[0057] The sulfur storage pipe 3 is placed in the heat exchange area 6 of the pipe box 1. Each pipe hole is correspondingly provided with a sulfur storage pipe 3. The bottom of the sulfur storage pipe 3 is closed and the top thereof is connected to the pipe hole, so that the inside of the sulfur storage pipe 3 is connected with the sulfur collection area 5.

[0058] The material of the sulfur storage pipe 3 is corrosion-resistant stainless steel. In the process of heat transfer, according to the basic principle of heat conduction (heat transfer rate is related to factors such as thermal conductivity, heat transfer area and temperature difference), a higher thermal conductivity means that heat can be transferred more quickly and efficiently inside the material and between the material and the external medium. This embodiment uses corrosion-resistant stainless steel, which has a higher thermal conductivity than the ceramic material in reference 1. This allows heat to be more smoothly transferred through the wall of the sulfur storage pipe 3 during heat storage and heat release, and can transfer heat to the required place or absorb heat from the outside world and store it in a more timely manner, thereby improving the heat transfer efficiency of the entire heat storage system as a whole.

[0059] The top opening of the sulfur storage pipe 3 is welded on the tube sheet 2, and the interior of the tube box 1 is divided into two closed chambers. The upper part of the tube sheet 2 and the interior of the sulfur storage pipe 3 are connected to form a closed chamber, and the lower part of the tube sheet 2 forms another closed chamber. Through the design of the sulfur collection area 5, each sulfur storage pipe 3 is connected through the sulfur collection area 5, and the gas phase space is reserved in the pipe box 1, which can effectively control the pressure in the sulfur storage pipe 3 and prevent the sulfur storage pipe 3 from rupturing due to the volume expansion of the liquid due to heating. A pressure gauge 11 for monitoring the pressure of the sulfur collection area 5 is provided on the pipe cover of the pipe box 1 to monitor the pressure of the sulfur collection area 5 in real time.

[0060] The sulfur storage pipe 3 is filled with sulfur, a heat storage material. The heating part of the electric heater 4 is placed in the liquid storage pipe and in contact with the heat storage material sulfur. In this embodiment, the electric heater 4 is specifically an electric heating rod, the lower end of which passes through the pipe cover of the pipe box 1 and is placed in the sulfur storage pipe 3. Since the electric heating rod is immersed in liquid sulfur and directly contacts the heating medium, it has higher thermal efficiency.

[0061] Sulfur is not a conventional thermal storage material, and there are currently no engineering cases using sulfur as a thermal storage material. Molten salt has been used in many applications as a thermal storage medium. Molten salt has a low viscosity, and large-scale molten salt thermal storage systems use molten salt pumps. Molten salt circulates between cold tanks and hot tanks, and forced convection heat transfer is performed through heat exchangers.

[0062] Characteristics of sulfur as a heat storage material: (1) Lower heat storage medium cost: The specific heat capacity of molten sulfur is ~20% lower than that of molten salt (solar salt, ternary salt), and the density is about 10% lower; as a heat storage medium, it is disadvantageous for liquid sulfur, but considering that the commercial price of liquid sulfur is only 1 / 5 of that of molten salt, these disadvantages can be compensated. (2) Higher operating temperature range: As a heat transfer / storage medium, liquid sulfur has a wider operating temperature range. The melting point of sulfur is 114°C, and the saturated vapor pressure at 700°C is about 1.7MPa; considering the pressure, liquid sulfur can store heat in the range of 120-700°C in liquid form; even in a normal pressure environment, molten sulfur has an operating temperature range of 130°C to 430°C; while the most mature solar salt and ternary nitrate, the current temperature ranges used in engineering are 290-565°C and 150°C to 400°C respectively.

[0063] Liquid sulfur has a high viscosity in the medium temperature range (160-300°C) and poor fluidity, and cannot be used as a heat transfer medium. However, the sulfur in this patent is stored in the sulfur storage pipe 3. When releasing heat, the sulfur is in a natural convection state (if it is used in the low temperature field below 130°C, it is accompanied by phase change). There is no need to consider the fluidity of liquid sulfur (avoiding the problem of poor fluidity of liquid sulfur in a specific temperature range). The natural convection heat transfer efficiency is not as good as the forced convection heat transfer, but this patent can enhance heat transfer by increasing the heat transfer area, optimizing the flow channel design, and reducing the flow "dead zone".

[0064] Specifically, a plurality of baffles 7 are arranged from top to bottom in the heat exchange area 6 of the pipe box 1, so that a serpentine flow channel is formed in the heat exchange area 6, the sulfur storage pipe 3 is arranged through the baffles 7, and heat medium inlets / outlets are respectively arranged at both ends of the side wall of the pipe box 1 corresponding to the serpentine flow channel.

[0065] When the medium flows in the pipe box 1, the originally straight flow direction of the medium meets the baffle 7, and then turns and meanders according to the baffle 7, forming a serpentine flow channel in the heat exchange area 6. The flow channel greatly prolongs the residence time and flow path of the medium in the heat exchange area 6, and promotes more sufficient and efficient heat exchange between the medium and the wall surface of the sulfur storage pipe 3 in the heat exchange area 6, thereby improving the heat exchange efficiency.

[0066] In order to avoid heat loss as much as possible during the heat storage process, a heat preservation measure is usually adopted on the pipe box 1, such as setting a heat preservation layer, and the material of the heat preservation layer can be glass wool, which is made by fiberizing melted glass. Its fiber diameter is very fine, and there are a large number of tiny pores inside, which can effectively prevent the transfer of heat.

[0067] The outer wall of the sulfur storage tube 3 is provided with fins 10. By providing fins on the heat exchange tube, the heat exchange area is greatly increased. At the same time, the fins can also destroy the fluid boundary layer. During the heat exchange process, when the fluid (liquid or gas) flows over the surface of the sulfur storage tube 3, a boundary layer will be formed near the tube wall. The fluid flow rate in this boundary layer is relatively low, which has an obstructive effect on heat exchange. The presence of the fins causes the fluid to generate turbulence when flowing through the fins. For example, when a gas medium flows through the fins, the shape and arrangement of the fins will change the flow path of the air, and the gas medium will form vortices and turbulence in the channels between the fins. This turbulent state can effectively reduce the thickness of the boundary layer, so that the core part of the fluid (the part with a higher flow rate) can be closer to the heat exchange surface, thereby improving the convective heat transfer coefficient.

[0068] The bottom of the sulfur storage pipe 3 is provided with an anti-vibration assembly 8, which includes a guide sleeve 802 and a guide column 801, which are respectively fixed to the bottom of the pipe box 1 and the sulfur storage pipe 3, and the lower end of the guide column 801 is inserted into the guide sleeve 802. The function of the anti-vibration assembly 8 is to prevent the sulfur casing from vibrating in the flow field. The lower end of the sulfur storage pipe 3 needs to be fixed. Since the length of the sulfur storage pipe 3 will increase after thermal expansion, if it is completely fixed, the thermal expansion will "break" the casing of the pipe box. The anti-vibration assembly 8 is used to limit the lateral displacement of the sulfur storage pipe 3 and release the axial displacement, which can prevent the casing from vibrating and absorb the axial expansion of the sulfur casing.

[0069] like Figure 2 As shown, the heat exchange area 6 of the pipe box 1 is divided into four heat exchange areas 6 by a cross partition 9, each heat exchange area 6 is provided with a baffle 7, the flow channels of the four heat exchange areas 6 are connected in series, and the two ends of the corresponding flow channels of the pipe box 1 are respectively provided with a medium inlet / outlet.

[0070] The flow channels of the four heat exchange areas are connected in series to form a complete and continuous fluid passage. The fluid can flow through each heat exchange area in sequence, further extending the residence time and flow path of the medium in the heat exchange area 6 to improve the heat exchange efficiency.

[0071] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art may make various modifications or variations within the scope of the claims, which do not affect the essence of the present invention.

Claims

1. A sensible heat-latent heat composite modular sulfur thermal storage device, characterized in that: The invention comprises a heat exchanger and a sulfur heat storage module, wherein the sulfur heat storage module comprises a plurality of sulfur heat storage units connected in parallel or in series, wherein the heat exchanger (14) has a heat release medium inlet and a heat release medium outlet, wherein the heat release medium outlet of the heat exchanger (14) is connected to a circulation pump (15) through a pipeline, wherein the output pipeline of the circulation pump (15) is respectively connected to the heat medium inlets of the plurality of sulfur heat storage units through branch pipes, and the heat medium outlets of the plurality of sulfur heat storage units are connected to the heat medium inlet of the heat exchanger (14) through branch pipes. The sulfur heat storage unit comprises a tube box (1), a tube sheet (2), a sulfur storage tube (3) and an electric heater (4); the tube sheet (2) divides the interior of the tube box (1) into an upper sulfur collection area (5) and a lower heat exchange area (6); and a plurality of tube holes are evenly distributed on the tube sheet (2); The sulfur storage pipe (3) is placed in the heat exchange area (6) of the pipe box (1), and each pipe hole is correspondingly provided with a sulfur storage pipe (3). The bottom of the sulfur storage pipe (3) is closed, and the top thereof is butted with the pipe hole, so that the interior of the sulfur storage pipe (3) is connected with the sulfur collection area (5). The interior of the sulfur storage pipe (3) is filled with heat storage material sulfur. The heating part of the electric heater (4) is placed in the liquid storage pipe and contacts with the heat storage material sulfur. The bottom of the sulfur storage pipe (3) is provided with an anti-vibration component (8), and the anti-vibration component (8) comprises a guide sleeve (802) and a guide column (801). The guide sleeve (802) and the guide column (801) are respectively fixed to the bottom of the pipe box (1) and the sulfur storage pipe (3), and the lower end of the guide column (801) is inserted into the guide sleeve (802); A plurality of baffles (7) are arranged from top to bottom in the heat exchange area (6) of the pipe box (1), so that a serpentine flow channel is formed in the heat exchange area (6), the sulfur storage pipe (3) is arranged through the baffles (7), and a heat medium inlet / outlet is respectively arranged at both ends of the side wall of the pipe box (1) corresponding to the serpentine flow channel.

2. A sensible heat-latent heat composite modular sulfur thermal storage device as claimed in claim 1, characterized in that: The heat exchange area (6) of the pipe box (1) is divided into a plurality of heat exchange areas (6) by vertical partitions, each heat exchange area (6) is provided with a baffle (7), the flow channels of the plurality of heat exchange areas (6) are connected in series, and medium inlets / outlets are respectively provided at both ends of the corresponding flow channels of the pipe box (1).

3. A sensible heat-latent heat composite modular sulfur thermal storage device as claimed in claim 2, characterized in that: The heat exchange area (6) of the pipe box (1) is divided into four heat exchange areas (6) by a cross partition (9), each heat exchange area (6) is provided with a baffle (7), the flow channels of the four heat exchange areas (6) are connected in series, and medium inlets / outlets are respectively provided at both ends of the corresponding flow channels of the pipe box (1).

4. A sensible heat-latent heat composite modular sulfur thermal storage device as claimed in claim 1, characterized in that: The outer wall of the sulfur storage pipe (3) is provided with fins (10).

5. A sensible heat-latent heat composite modular sulfur thermal storage device as claimed in claim 1, characterized in that: A pressure gauge (11) for monitoring the pressure of the sulfur collecting area (5) is provided on the pipe cover of the pipe box (1).

6. A sensible heat-latent heat composite modular sulfur thermal storage device as claimed in claim 1, characterized in that: The electric heater (4) is an electric heating rod, the lower end of which passes through the pipe cover of the pipe box (1) and is placed in the sulfur storage pipe (3).

7. A sensible heat-latent heat composite modular sulfur thermal storage device as claimed in claim 1, characterized in that: The heat medium inlet branch pipes of the pipe box (1) are all provided with regulating valves (12), and the heat medium outlet branch pipes of the pipe box (1) are all provided with temperature detection elements (13).

8. The sensible heat-latent heat composite modular sulfur thermal storage device according to claim 1, characterized in that: At least three baffles (7) are arranged in the heat exchange area.

9. The sensible heat-latent heat composite modular sulfur thermal storage device according to claim 1, characterized in that: The pipe box (1) is provided with a thermal insulation layer.

10. A sensible heat-latent heat composite modular sulfur thermal storage device as claimed in claim 9, characterized in that: The material of the thermal insulation layer is glass fiber.

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