A molten salt heat tracing steam generator

Abstract

The utility model provides a kind of steam generating device of fused salt heat tracing, it is related to steam equipment technical field, including steam generator cylinder, the steam generator cylinder both ends are equipped with pipe box, the pipe box is connected with the pipe group in the inside of steam generator cylinder by tube plate, the steam generator cylinder top and bottom are centrally equipped with fused salt medium inlet and fused salt medium outlet, the pipe group vertical arrangement is by several groups, and the pipe group equidistance arrangement is spaced by spacer in each group, the spacer both ends are installed in the square frame in the inside of steam generator cylinder, and the pipe between each pipe group is sequentially staggered with guide frame and is equipped with between upper and lower;By the unique guide frame design and fused salt medium guide groove structure, the flow of fused salt medium in shell pass is more smooth, reduces flow resistance, avoids the problem of inadeguate flow caused by traditional baffle design, significantly improves the circulation efficiency of fused salt, to speed up heat exchange speed.

Description

Technical Field

[0001] This utility model relates to the field of steam equipment technology, and in particular to a steam generating device with molten salt tracing. Background Technology

[0002] With the development of industry, traditional heating methods are often unable to meet the requirements of maintaining high temperatures for a long time for some key equipment and pipelines that need to maintain high temperatures to prevent the medium from solidifying or to maintain fluidity. Molten salt heat tracing technology, as an efficient and reliable heating method, has gradually become the mainstream choice in the industrial field. Molten salt is particularly suitable for these harsh working conditions due to its excellent thermal conductivity and high heat capacity. However, existing molten salt heat tracing systems, especially heat exchangers (i.e., steam generators or heat exchangers) used to generate steam, have many technical bottlenecks in practical applications. Traditional shell-and-tube heat exchangers have poor circulation efficiency due to the high temperature but poor fluidity of molten salt. When baffles are used in the shell side, this not only reduces heating efficiency and leads to energy waste, but may also affect the stable operation of the system. Therefore, we propose a steam generator with molten salt heat tracing. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by redesigning the internal structure of the heat exchanger and specifically adjusting the flow channel layout of the molten salt in the shell side, thereby improving the circulation efficiency of the molten salt during the flow process.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A steam generator for molten salt tracing includes a steam generator cylinder with tube boxes at both ends. The tube boxes are connected to the tube bundles inside the steam generator cylinder via tube sheets. A molten salt medium inlet and a molten salt medium outlet are respectively located at the top and bottom of the steam generator cylinder. The tube bundles are arranged vertically in several groups, with each group of tube bundles equidistant from each other by a partition plate. Both ends of the partition plate are installed within a square frame inside the steam generator cylinder. Guide frames are staggered between the tube bundles in each group, with the higher end of the guide frame fixed to the tube sheet and the lower end of the guide frame having a molten salt medium flow port between it and the tube sheet. Molten salt medium guide grooves are provided between the molten salt medium inlet and the molten salt medium outlet and the square frame.

[0005] Furthermore, the two tube boxes are respectively provided with a tube-side medium inlet and a tube-side medium outlet. The tube-side medium inlet is located at the top and connected to a water preheating device, while the tube-side medium outlet is located at the bottom and connected to the water preheating device through a circulating pump to form a circulation.

[0006] Furthermore, each of the two pipe boxes is also provided with an air inlet and a steam outlet, the steam outlet being connected to a steam pipe and the air inlet being connected to an air source.

[0007] Furthermore, both the molten salt medium inlet and the molten salt medium outlet are connected to the central molten salt heating furnace via a circulating pump.

[0008] Furthermore, both ends of the spacer are sealed and fixed to the tube sheet, separating each group of tubes, so that the molten salt medium enters the molten salt medium inlet, the molten salt medium guide tank at the molten salt medium inlet, and the lower molten salt medium guide tank at the outlet of each group of tubes.

[0009] Furthermore, the guide frame is arranged in an inclined structure, with the high and low ends of the guide frame arranged alternately.

[0010] Furthermore, the molten salt medium guiding tank includes a guide frame and a frame inlet. The frame inlet is opened on the outside of the square frame and corresponds to one end of the pipe group. The guide frame is located between the frame inlet and the molten salt medium inlet and outlet.

[0011] Furthermore, a diversion frame is provided at the top of the guide frame between the molten salt medium inlet and the square frame, and the diversion frame has several openings on both sides and the top corresponding to each group of pipes.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. Improve molten salt circulation efficiency: Through the unique guide frame design and molten salt medium guiding groove structure, the flow of molten salt medium in the shell side is smoother, reducing flow resistance and avoiding the flow obstruction problem caused by traditional baffle design. This significantly improves the circulation efficiency of molten salt and thus accelerates the heat exchange rate.

[0013] 2. Enhanced heat exchange performance: The inclined and staggered arrangement of the guide frames and the setting of the flow dividers ensure more sufficient contact between the molten salt medium and the pipe assembly, thereby enhancing the heat exchange effect, improving steam generation efficiency, and reducing energy consumption. Attached Figure Description

[0014] Figure 1 A schematic diagram of the overall structure of a steam generator for molten salt heating provided by this utility model; Figure 2 A schematic diagram of one end of a square frame of a steam generator for molten salt heating provided by this utility model; Figure 3 A partial enlarged schematic diagram of the steam generator for molten salt heating provided by this utility model; Figure 4A schematic diagram of the anatomical structure of the steam generator cylinder of a steam generator for molten salt heating provided by this utility model; Figure 5 This is a partial enlarged structural diagram of a steam generator with molten salt heating provided by this utility model.

[0015] Legend: 1. Steam generator cylinder; 2. Tube box; 21. Tube sheet; 22. Tube-side medium inlet; 23. Tube-side medium outlet; 24. Air inlet; 25. Steam outlet; 3. Molten salt medium inlet; 31. Molten salt medium outlet; 4. Pipe assembly; 41. Pipeline; 5. Partition plate; 6. Square frame; 7. Guide frame; 8. Molten salt medium flow port; 9. Molten salt medium guide tank; 91. Guide frame; 92. Frame inlet; 93. Diverter frame. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to 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.

[0017] To facilitate understanding of this utility model, a more comprehensive description of this utility model will be provided below with reference to relevant embodiments, and several embodiments of this utility model will be given. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of this utility model more thorough and complete.

[0018] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0020] Example 1 like Figure 1-5 As shown, this utility model provides a technical solution: a steam generator for molten salt heating, specifically comprising a steam generator cylinder 1. The steam generator cylinder 1 serves as the main load-bearing structure of the entire device and is made of high-strength, high-temperature resistant, and corrosion-resistant metal materials, such as special alloy steel, to ensure stable operation in a high-temperature molten salt medium environment. Pipe boxes 2 are provided at both ends of the steam generator cylinder 1. The pipe boxes 2 are also made of high-temperature resistant and corrosion-resistant materials and are connected to the pipe assembly 4 inside the steam generator cylinder 1 via a tube sheet 21. The tube sheet 21 serves to seal and support the pipe assembly 4. It is connected to the pipe box 2 and the steam generator cylinder 1 using a welding process to ensure no leakage at the connection point.

[0021] The tube bundles 4 are arranged vertically and consist of several groups. Each group of tube bundles 4 is equidistant and separated by partition plates 5. The upper and lower ends of the partition plates 5 are installed inside the square frame 6 inside the steam generator shell 1. The square frame 6 is tightly fitted to the inner wall of the steam generator shell 1 and is fixed by welding or bolting. The two ends of the square frame 6 need to be fixed to the tube sheet 21. The square frame 6 provides a stable installation base for the partition plates 5. The partition plates 5 are made of metal plates with a certain thickness and strength. Their function is to divide the tube bundles 4 into multiple independent channels, allowing the molten salt medium to flow along a predetermined path and improving heat exchange efficiency. Guide frames 7 are staggered between the pipes 41 of each group of pipes 4. The guide frames 7 are made of metal and have a certain rigidity and corrosion resistance. The high end of the guide frame 7 is fixed to the tube sheet 21, and the low end of the guide frame 7 leaves a molten salt medium flow port 8 between it and the tube sheet 21. This design allows the molten salt medium to pass through the space between each group of pipes 4 in an orderly manner according to the guidance direction of the guide frame 7. At the same time, the molten salt medium flow port 8 ensures that the molten salt medium can flow smoothly from the top to the bottom of the pipe group 4 and avoid dead flow corners.

[0022] The top and bottom of the steam generator cylinder 1 are respectively provided with a molten salt medium inlet 3 and a molten salt medium outlet 31. Molten salt medium inlet 3 and molten salt medium outlet 31 are provided with molten salt medium guide grooves 9 between them and the square frame 6. The function of the molten salt medium guide grooves 9 is to guide the molten salt medium entering from the molten salt medium inlet 3 evenly into the square frame 6, and then distribute it to each group of pipe groups 4. At the same time, the molten salt medium flowing out of the pipe group 4 is smoothly discharged through the guide grooves 9 at the molten salt medium outlet 31.

[0023] Example 2 like Figure 1-5 As shown, the two tube boxes 2 are respectively equipped with a tube-side medium inlet 22 and a tube-side medium outlet 23. The tube-side medium inlet 22 is located at the top and connected to a water preheating device. The function of the water preheating device is to preheat the tube-side medium (water) entering the tube box 2, increase the water temperature entering the tube group 4, thereby reducing the energy required for heating in the tube group 4 and improving the energy utilization efficiency of the entire device. The tube-side medium outlet 23 is located at the bottom and is connected to the water preheating device through a circulation pump to form a circulation. The function of the circulation pump is to provide power so that the tube-side medium can circulate between the water preheating device and the tube box 2, ensuring that the tube-side medium can be continuously preheated and enter the tube group 4 for heating.

[0024] The two pipe boxes 2 are also equipped with air inlets 24 and steam outlets 25, respectively. The steam outlets 25 are connected to steam pipes for delivering the generated steam to equipment or systems that require steam. The air inlets 24 are connected to an air source, which can be an air compressor or other equipment capable of providing gas. The air entering through the air inlets 24 mainly serves to replenish the gas in the system and maintain a certain pressure loop.

[0025] Both the molten salt medium inlet 3 and the molten salt medium outlet 31 are connected to the central molten salt heater via a circulating pump. The function of the central molten salt heater is to heat the molten salt medium to the required temperature. Then, the high-temperature molten salt medium is transported to the molten salt medium inlet 3 via the circulating pump and enters the steam generator cylinder 1 to exchange heat with the tube group 4. After heat exchange, the low-temperature molten salt medium returns to the central molten salt heater through the molten salt medium outlet 31 for reheating, forming a cycle.

[0026] Both ends of the partition plate 5 are sealed and fixed to the tube sheet 21, separating each group of tubes 4, so that the molten salt medium enters the molten salt medium inlet 3, the molten salt medium guide groove 9 at the molten salt medium inlet 3, and the lower molten salt medium guide groove 9 at each group of tubes 4 and the molten salt medium outlet 31 in sequence. This sealing and fixing method ensures that the molten salt medium can only flow along the predetermined path and there will be no short circuit or leakage, thus ensuring the stability and efficiency of the heat exchange process.

[0027] The guide frame 7 is arranged in an inclined structure, with the high and low ends of the guide frame 7 staggered. This inclined design allows the molten salt medium to generate a certain disturbance during the flow process, which enhances the heat exchange effect between the molten salt medium and the tube group 4 and improves the steam generation efficiency.

[0028] The molten salt medium guiding tank 9 includes a guide frame 91 and a frame inlet 92. The frame inlet 92 is opened on the outside of the square frame 6 and corresponds to one end of the pipe group 4. The guide frame 91 is located between the frame inlet 92 and the molten salt medium inlet 3 and the molten salt medium outlet 31. The guide frame 91 can guide the molten salt to each pipe group 4.

[0029] A diversion frame 93 is provided at the top of the guide frame 91 between the molten salt medium inlet 3 and the square frame 6. The diversion frame 93 has several openings on both sides and the top, which correspond to each group of pipes 4. The function of the diversion frame 93 is to further subdivide the molten salt medium entering from the molten salt medium inlet 3, so that the molten salt medium can be more evenly distributed to each group of pipes 4.

[0030] The working process of this utility model is as follows: When using a steam generator with molten salt heating, firstly, the central molten salt heater is started to heat the molten salt medium to the set temperature. Then, the circulation pump connecting the molten salt medium inlet 3 and the molten salt medium outlet 31 is turned on, allowing the high-temperature molten salt medium to enter the steam generator cylinder 1 from the molten salt medium inlet 3. Under the guidance of the molten salt medium guide trough 9 and the guide frame 7, the molten salt medium flows through each group of tubes 4 in sequence, exchanging heat with the tube-side medium (water) in the tube group 4. During the heat exchange process, the tube-side medium absorbs the heat of the molten salt medium, gradually heats up, and vaporizes to generate steam. The generated steam is collected in the steam generator. At the top of the generator cylinder 1, steam is delivered to the location where it is needed via steam outlet 25 and steam pipes. Simultaneously, the low-temperature molten salt medium, after heat exchange, flows out from molten salt medium outlet 31 and returns to the central molten salt heater for reheating via a circulating pump, forming a cycle. Additionally, the tube-side medium enters the water preheating device from tube-side medium inlet 22 for preheating. The preheated tube-side medium then enters tube box 2 and flows into tube assembly 4 for heating. The heated tube-side medium flows out from tube-side medium outlet 23 and returns to the water preheating device via a circulating pump for further preheating, ensuring the tube-side medium remains within a suitable temperature range and improving steam generation efficiency. Inside the steam generator cylinder, steam rises after generation. Within this enclosed space, as new steam is continuously generated, the steam at the top gradually accumulates, forming a certain steam pressure, and the steam layer continuously vaporizes to generate pressure.

[0031] 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.

Claims

1. A steam generator for molten salt tracing, comprising a steam generator cylinder (1), wherein tube boxes (2) are provided at both ends of the steam generator cylinder (1), the tube boxes (2) are connected to the tube group (4) inside the steam generator cylinder (1) through tube plates (21), and molten salt medium inlet (3) and molten salt medium outlet (31) are respectively provided at the top and bottom of the steam generator cylinder (1), characterized in that: The pipe group (4) is arranged vertically in several groups. Each group of pipe groups (4) is arranged at equal intervals and separated by a partition plate (5). The upper and lower ends of the partition plate (5) are installed in the square frame (6) inside the steam generator cylinder (1). The pipes (41) between each group of pipe groups (4) are provided with guide frames (7) arranged vertically and alternately. The high end of the guide frame (7) is fixed to the tube sheet (21). The low end of the guide frame (7) is left with a molten salt medium flow port (8) between it and the tube sheet (21). The molten salt medium inlet (3) and the molten salt medium outlet (31) are provided with molten salt medium guide grooves (9) between them and the square frame (6).

2. The steam generator for molten salt tracing according to claim 1, characterized in that: The two tube boxes (2) are respectively provided with a tube-side medium inlet (22) and a tube-side medium outlet (23). The tube-side medium inlet (22) is located at the top and connected to a water preheating device. The tube-side medium outlet (23) is located at the bottom and connected to the water preheating device through a circulating pump to form a circulation.

3. The steam generator for molten salt heating according to claim 2, characterized in that: The two pipe boxes (2) are also provided with an air inlet (24) and a steam outlet (25), respectively. The steam outlet (25) is connected to a steam pipe, and the air inlet (24) is connected to an air source.

4. A steam generator for molten salt heating according to claim 1, characterized in that: The molten salt medium inlet (3) and molten salt medium outlet (31) are both connected to the central molten salt heating furnace via a circulating pump.

5. A steam generator for molten salt heating according to claim 1, characterized in that: Both ends of the spacer plate (5) are sealed and fixed to the tube sheet (21), separating each group of tubes (4) so ​​that the molten salt medium enters the molten salt medium inlet (3), the molten salt medium guide groove (9) at the molten salt medium inlet (3), and the lower molten salt medium guide groove (9) at each group of tubes (4) and the molten salt medium outlet (31) in sequence.

6. A steam generator for molten salt tracing according to claim 1, characterized in that: The guide frame (7) is arranged in an inclined structure, with the high and low ends of the guide frame (7) arranged alternately.

7. A steam generator for molten salt tracing according to claim 1, characterized in that: The molten salt medium guide tank (9) includes a guide frame (91) and a frame inlet (92). The frame inlet (92) is opened on the outside of the square frame (6) and corresponds to one end of the pipe group (4). The guide frame (91) is located between the frame inlet (92), the molten salt medium inlet (3), and the molten salt medium outlet (31).

8. A steam generator for molten salt tracing according to claim 7, characterized in that: The guide frame (91) between the molten salt medium inlet (3) and the square frame (6) is provided with a diversion frame (93) at the top. The diversion frame (93) has several openings on both sides and the top, which correspond to each group of pipes (4).

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