Anti-corrosion efficient heat transfer molten salt heat exchanger

Abstract

The utility model provides an anti-corrosion efficient heat transfer fused salt heat exchanger, which relates to the technical field of chemical metallurgy, and comprises a straight cylinder, an upper flexible seal head and a lower flexible seal head, the lower end of the upper flexible seal head and the upper end of the lower flexible seal head are respectively provided with a cover cap, and the cover caps at the upper end and the lower end are respectively connected to the upper end and the lower end of the straight cylinder. Sealing plates are arranged between the straight barrel and the covers at the upper end and the lower end, and a stainless steel heat exchange pipe is connected between the sealing plates at the upper end and the lower end and located in the straight barrel; the sealing plates are integrally formed at the upper end and the lower end of the straight barrel, the stainless steel heat exchange pipes penetrate through the sealing plates to be communicated with the upper flexible end socket and the lower flexible end socket respectively, so that mixed toxic gas is introduced to receive heat exchange, and fused salt is introduced into the straight barrel through the fused salt inlet and the fused salt outlet to exchange heat; fused salt cannot flow into the joint of the cover caps of the upper flexible end socket and the lower flexible end socket and the straight barrel, corrosion leakage is avoided, and the safety performance is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical metallurgy, and in particular to a corrosion-resistant and high-efficiency heat transfer molten salt heat exchanger. Background Art

[0002] Molten salt is a molten body composed of metal cations and non-metal anions after the salt is melted. After the salt is melted, it has the same properties as liquid, but it has high temperature characteristics under normal pressure. Therefore, it is more suitable for heat exchange between fluids with different temperature differences. Different molten salts have many uses in the industrial field, such as being used as heat transfer media in heat exchangers, etc.

[0003] In the existing molten salt heat exchanger, the heads are generally welded to the upper and lower ends of the cylinder respectively. In the process of molten salt flowing through the cylinder, the molten salt will pass through the cylinder and the heads. After long-term use, the welding positions of the heads and the cylinder are easily corroded, causing leakage. The overall corrosion resistance is not strong, which affects the heat exchange efficiency. Therefore, the utility model proposes a corrosion-resistant and high-efficiency heat transfer molten salt heat exchanger to solve the problems existing in the prior art. Utility Model Content

[0004] In view of the above problems, the utility model proposes a corrosion-resistant and efficient heat transfer molten salt heat exchanger, which avoids corrosion leakage and ensures safety performance.

[0005] To achieve the purpose of the utility model, the utility model is implemented through the following technical solutions: a corrosion-resistant and high-efficiency heat transfer molten salt heat exchanger, comprising a straight cylinder, an upper flexible head and a lower flexible head, the lower end of the upper flexible head and the upper end of the lower flexible head are both provided with covers, and the covers at the upper and lower ends are respectively connected to the upper and lower ends of the straight cylinder, sealing plates are both provided between the straight cylinder and the covers at the upper and lower ends, and the sealing plates are integrally formed with the straight cylinder, stainless steel heat exchange tubes are connected between the sealing plates at the upper and lower ends, and the stainless steel heat exchange tubes are located inside the straight cylinder, and the upper and lower ends of the stainless steel heat exchange tubes are respectively connected to the upper flexible head and the lower flexible head;

[0006] A mixed poisonous gas inlet is provided on the upper flexible head, a mixed poisonous gas outlet is provided below the lower flexible head, and a molten salt inlet and a molten salt outlet are provided below one side and above the other side of the straight cylinder respectively.

[0007] A further improvement is that a partition is provided inside the straight cylinder, and multiple groups of partitions are provided at equal intervals, the diameter of the partition is smaller than the inner diameter of the straight cylinder, and the multiple groups of partitions are staggered left and right.

[0008] A further improvement is that: the stainless steel heat exchange tubes are provided in multiple groups, and the multiple groups of stainless steel heat exchange tubes penetrate the multiple groups of partitions.

[0009] A further improvement is that a residual molten salt discharge port is provided below the side of the straight cylinder away from the molten salt inlet, and a valve is provided on the residual molten salt discharge port.

[0010] A further improvement is that an exhaust port is provided on one side of the cover at the upper end, and a valve is provided on the exhaust port.

[0011] A further improvement is that a support is provided at a middle position of the outer side of the straight cylinder, and the support is integrally formed with the straight cylinder.

[0012] A further improvement is that the side wall of the straight cylinder is double-layered, and an inner cavity is provided inside the side wall of the straight cylinder, and the inner cavity is filled with reinforcing ribs, and the reinforcing ribs are provided in multiple groups.

[0013] A further improvement is that a cleaning port is provided above one side of the straight cylinder, and a sealing cover is provided on the cleaning port.

[0014] The beneficial effects of the utility model are:

[0015] 1. The utility model has sealing plates integrally formed at the upper and lower ends of the straight cylinder, and stainless steel heat exchange pipes pass through the sealing plates to communicate with the upper flexible head and the lower flexible head respectively, so that mixed toxic gas is introduced to receive heat exchange, and molten salt is introduced into the straight cylinder through the molten salt inlet and the molten salt outlet for heat exchange. The molten salt will not flow into the connection between the cover of the upper flexible head and the lower flexible head and the straight cylinder, so as to avoid corrosion and leakage, and ensure safety performance.

[0016] 2. The molten salt of the utility model flows in a straight cylinder with a large flow area and small resistance. Through the staggered guidance of multiple groups of baffles, the flow velocity of the molten salt is relatively constant during the flow, ensuring a stable heat exchange effect. The toxic gas flows in the stainless steel heat exchange tube, and the sealing effect is safe and reliable, without turns or elbows, which greatly reduces the resistance of the gas flow.

[0017] 3. The side wall of the straight cylinder of the utility model has an inner cavity, and the inner cavity is filled with reinforcing ribs to further improve the pressure resistance and corrosion resistance of the straight cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is the front view of the utility model;

[0019] Figure 2 It is a cross-sectional view of the utility model;

[0020] Figure 3 For the utility model Figure 2 Schematic diagram of the structure at point A in the middle.

[0021] Among them: 1. straight cylinder; 2. upper flexible head; 3. lower flexible head; 4. sealing plate; 5. stainless steel heat exchange tube; 6. mixed toxic gas inlet; 7. mixed toxic gas outlet; 8. molten salt inlet; 9. molten salt outlet; 10. partition; 11. residual molten salt discharge port; 12. exhaust port; 13. support; 14. inner cavity; 15. reinforcing ribs; 16. cleaning port; 17. cover. DETAILED DESCRIPTION

[0022] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with an embodiment. The embodiment is only used to explain the present invention and does not constitute a limitation on the protection scope of the present invention.

[0023] Embodiment 1

[0024] according to Figure 1 , 2 As shown in Figures 3 and 4, this embodiment proposes a corrosion-resistant and high-efficiency heat transfer molten salt heat exchanger, comprising a straight cylinder 1, an upper flexible head 2 and a lower flexible head 3, the lower end of the upper flexible head 2 and the upper end of the lower flexible head 3 are both provided with a cover 17, and the cover 17 at the upper and lower ends are respectively connected to the upper and lower ends of the straight cylinder 1, a sealing plate 4 is provided between the straight cylinder 1 and the cover 17 at the upper and lower ends, and the sealing plate 4 is integrally formed with the straight cylinder 1, a stainless steel heat exchange tube 5 is connected between the sealing plates 4 at the upper and lower ends, and the stainless steel heat exchange tube 5 is located inside the straight cylinder 1, and the upper and lower ends of the stainless steel heat exchange tube 5 are respectively connected to the upper flexible head 2 and the lower flexible head 3;

[0025] The upper flexible end cap 2 is provided with a mixed poisonous gas inlet 6, the lower flexible end cap 3 is provided with a mixed poisonous gas outlet 7, and the lower side of the straight cylinder 1 is provided with a molten salt inlet 8 and a molten salt outlet 9 respectively. When in use, a sealing plate 4 is integrally formed at the upper and lower ends of the straight cylinder 1, and a stainless steel heat exchange pipe 5 passes through the sealing plate and is connected to the upper flexible end cap 2 and the lower flexible end cap 3 respectively, so that the mixed poisonous gas is introduced to receive heat exchange, and the molten salt is introduced into the straight cylinder 1 through the molten salt inlet 8 and the molten salt outlet 9 for heat exchange, and the molten salt will not flow into the connection between the cover 17 of the upper flexible end cap 2 and the lower flexible end cap 3 and the straight cylinder 1, so as to avoid corrosion and leakage, and ensure safety performance. The cover 17 and the straight cylinder 1 are butt-jointed, and the butt joint is 100% radiographically inspected, which not only alleviates stress concentration, but also is designed and manufactured completely according to the pressure-bearing components, ensuring the safety performance of the pressure heat exchanger; the straight cylinder 1 and the stainless steel heat exchange tube 5 are made of stainless steel S32168, which completely avoids corrosion problems, has a low maintenance rate and few failures, and greatly extends the service life of the equipment.

[0026] The interior of the straight cylinder 1 is provided with partitions 10, and multiple groups of partitions 10 are equidistantly arranged. The diameter of the partitions 10 is smaller than the inner diameter of the straight cylinder 1, and multiple groups of the partitions 10 are staggered left and right. There are multiple groups of stainless steel heat exchange tubes 5, and multiple groups of stainless steel heat exchange tubes 5 penetrate multiple groups of partitions 10. The molten salt flows in the straight cylinder 1, with a large flow area and small resistance. Through the staggered guidance of multiple groups of partitions 10, the flow velocity of the molten salt is relatively constant during the flow, ensuring a stable heat exchange effect; the toxic gas flows in the stainless steel heat exchange tube 5, and the sealing effect is safe and reliable, without turns or elbows, which greatly reduces the resistance of the gas flow.

[0027] A residual molten salt drain port 11 is provided at the lower part of the straight cylinder 1 away from the molten salt inlet 8, and a valve is provided on the residual molten salt drain port 11. An exhaust port 12 is provided at one side of the cover 17 at the upper end, and a valve is provided on the exhaust port 12. The highest exhaust port 12 and the lowest residual molten salt drain port 11 are provided to ensure the operation stability of the high-temperature molten salt.

[0028] A support 13 is provided at the middle position of the outer side of the straight cylinder 1, and the support 13 is integrally formed with the straight cylinder 1. The support 13 is designed in the middle position, and both ends of the straight cylinder 1 can expand freely upward and downward, avoiding damage caused by equipment expansion problems.

[0029] Embodiment 2

[0030] according to Figure 1 , 2 As shown in Figures 3 and 4, this embodiment proposes a corrosion-resistant and high-efficiency heat transfer molten salt heat exchanger, comprising a straight cylinder 1, an upper flexible head 2 and a lower flexible head 3, the lower end of the upper flexible head 2 and the upper end of the lower flexible head 3 are both provided with a cover 17, and the cover 17 at the upper and lower ends are respectively connected to the upper and lower ends of the straight cylinder 1, a sealing plate 4 is provided between the straight cylinder 1 and the cover 17 at the upper and lower ends, and the sealing plate 4 is integrally formed with the straight cylinder 1, a stainless steel heat exchange tube 5 is connected between the sealing plates 4 at the upper and lower ends, and the stainless steel heat exchange tube 5 is located inside the straight cylinder 1, and the upper and lower ends of the stainless steel heat exchange tube 5 are respectively connected to the upper flexible head 2 and the lower flexible head 3;

[0031] The upper flexible end cap 2 is provided with a mixed poisonous gas inlet 6, the lower flexible end cap 3 is provided with a mixed poisonous gas outlet 7, and the lower side of the straight cylinder 1 is provided with a molten salt inlet 8 and a molten salt outlet 9 respectively. When in use, a sealing plate 4 is integrally formed at the upper and lower ends of the straight cylinder 1, and a stainless steel heat exchange pipe 5 passes through the sealing plate and is connected to the upper flexible end cap 2 and the lower flexible end cap 3 respectively, so that the mixed poisonous gas is introduced to receive heat exchange, and the molten salt is introduced into the straight cylinder 1 through the molten salt inlet 8 and the molten salt outlet 9 for heat exchange, and the molten salt will not flow into the connection between the cover 17 of the upper flexible end cap 2 and the lower flexible end cap 3 and the straight cylinder 1, so as to avoid corrosion and leakage, and ensure safety performance. The cover 17 and the straight cylinder 1 are butt-jointed, and the butt joint is 100% radiographically inspected, which not only alleviates stress concentration, but also is designed and manufactured completely according to the pressure-bearing components, ensuring the safety performance of the pressure heat exchanger; the straight cylinder 1 and the stainless steel heat exchange tube 5 are made of stainless steel S32168, which completely avoids corrosion problems, has a low maintenance rate and few failures, and greatly extends the service life of the equipment.

[0032] The side wall of the straight cylinder 1 is double-layered, and an inner cavity 14 is provided inside the side wall of the straight cylinder 1. The inner cavity 14 is filled with reinforcing ribs 15, and there are multiple groups of reinforcing ribs 15. The inner cavity 14 is provided inside the side wall of the straight cylinder 1, and the inner cavity 14 is filled with reinforcing ribs 15, which further improves the pressure resistance and corrosion resistance of the straight cylinder 1.

[0033] A cleaning port 16 is provided above one side of the straight cylinder body 1, and a sealing cover is provided on the cleaning port 16. When in use, the sealing cover is opened, and a cleaning medium can be introduced through the cleaning port 16 to clean the inside of the straight cylinder body 1.

[0034] The corrosion-resistant and high-efficiency heat transfer molten salt heat exchanger is provided with sealing plates 4 at the upper and lower ends of the straight cylinder 1 in an integrated manner, and is connected to the upper flexible head 2 and the lower flexible head 3 respectively through the stainless steel heat exchange tube 5 through the sealing plate, so that the mixed toxic gas is introduced to receive the heat exchange, and the molten salt is introduced into the straight cylinder 1 through the molten salt inlet 8 and the molten salt outlet 9 for heat exchange, and the molten salt will not flow into the connection between the cover 17 of the upper flexible head 2 and the lower flexible head 3 and the straight cylinder 1, so as to avoid corrosion and leakage, and ensure safety performance. In addition, the molten salt of this product flows in the straight cylinder 1, with a large flow area and small resistance. Through the staggered guidance of multiple groups of partitions 10, the flow rate of the molten salt is relatively constant when it flows, which ensures a stable heat exchange effect. The toxic gas flows in the stainless steel heat exchange tube 5, and the sealing effect is safe and reliable, without turns and elbows, which greatly reduces the resistance of the gas flow. In addition, an inner cavity 14 is provided inside the side wall of the straight cylinder body 1 of the product, and the inner cavity 14 is filled with reinforcing ribs 15 to further improve the pressure resistance and corrosion resistance of the straight cylinder body 1.

[0035] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A corrosion-resistant and high-efficiency heat transfer molten salt heat exchanger, comprising a straight cylinder (1), an upper flexible head (2) and a lower flexible head (3), characterized in that: The lower end of the upper flexible end cap (2) and the upper end of the lower flexible end cap (3) are both provided with a cover (17), and the cover caps (17) at the upper and lower ends are respectively connected to the upper and lower ends of the straight cylinder (1), a sealing plate (4) is provided between the straight cylinder (1) and the cover caps (17) at the upper and lower ends, and the sealing plate (4) and the straight cylinder (1) are integrally formed, a stainless steel heat exchange tube (5) is connected between the sealing plates (4) at the upper and lower ends, and the stainless steel heat exchange tube (5) is located inside the straight cylinder (1), and the upper and lower ends of the stainless steel heat exchange tube (5) are respectively connected to the interior of the upper flexible end cap (2) and the lower flexible end cap (3); A mixed poisonous gas inlet (6) is provided on the upper flexible seal head (2), a mixed poisonous gas outlet (7) is provided below the lower flexible seal head (3), and a molten salt inlet (8) and a molten salt outlet (9) are provided below one side and above the other side of the straight cylinder (1), respectively.

2. The corrosion-resistant and high-efficiency heat transfer molten salt heat exchanger according to claim 1 is characterized in that: A partition (10) is provided inside the straight cylinder (1), and a plurality of groups of partitions (10) are provided at equal intervals. The diameter of the partition (10) is smaller than the inner diameter of the straight cylinder (1), and the plurality of groups of partitions (10) are staggered left and right.

3. The corrosion-resistant and high-efficiency heat transfer molten salt heat exchanger according to claim 2 is characterized in that: The stainless steel heat exchange tubes (5) are provided in multiple groups, and the multiple groups of stainless steel heat exchange tubes (5) penetrate the multiple groups of partition plates (10).

4. The corrosion-resistant and high-efficiency heat transfer molten salt heat exchanger according to claim 1 is characterized in that: A residual molten salt discharge port (11) is provided below the side of the straight cylinder (1) away from the molten salt inlet (8), and a valve is provided on the residual molten salt discharge port (11).

5. The corrosion-resistant and high-efficiency heat transfer molten salt heat exchanger according to claim 4 is characterized in that: An exhaust port (12) is provided on one side of the cover (17) at the upper end, and a valve is provided on the exhaust port (12).

6. The corrosion-resistant and high-efficiency heat transfer molten salt heat exchanger according to claim 5 is characterized in that: A support (13) is provided at a middle position on the outer side of the straight cylindrical body (1), and the support (13) and the straight cylindrical body (1) are integrally formed.

7. The corrosion-resistant and high-efficiency heat transfer molten salt heat exchanger according to claim 1 is characterized in that: The side wall of the straight cylinder (1) is double-layered, and an inner cavity (14) is provided inside the side wall of the straight cylinder (1), and the inner cavity (14) is filled with reinforcing ribs (15), and the reinforcing ribs (15) are provided in multiple groups.

8. The corrosion-resistant and high-efficiency heat transfer molten salt heat exchanger according to claim 1 is characterized in that: A cleaning port (16) is provided above one side of the straight cylindrical body (1), and a sealing cover is provided on the cleaning port (16).

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