Annular spiral runner structure of fused salt electric heater
By designing an annular spiral flow channel structure in the molten salt electric heater, the problem of lack of anti-short circuit protection in the spiral flow channel design is solved, and a more uniform and efficient heating effect is achieved.
Patent Information
- Application Number
- CN202420163927.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-23
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2034-01-23
AI Technical Summary
The spiral runner design of existing molten salt electric heaters lacks a short-circuit-proof structure, which causes molten salt fluid to form a short-circuit through the gap, reducing the heating effect and making the heating uneven.
An annular spiral flow channel structure is designed. By arranging a wrapping cylinder, a central cylinder and a spiral baffle inside the heater shell, a stable and sealed spiral diversion channel is formed to avoid the loss of molten salt medium through the gap.
It effectively prevents 10% of the molten salt medium to be heated from being lost through the gap, improves the heating effect, makes heating more uniform, eliminates the low flow rate area in the center, and avoids temperature dead zones.
Smart Images
Figure CN222378455U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of electric heaters, and in particular relates to an annular spiral flow channel structure of a molten salt electric heater. Background Art
[0002] People engaged in the electric heater industry are committed to continuously improving the efficiency of electric heaters. The emergence of the diversion system has further promoted the application of electric heaters in molten salt heating, and then the spiral flow channel molten salt electric heater was born. The spiral flow channel molten salt electric heater enhances the diversion by adding spiral baffles inside the electric heater cavity, making the heating effect of the spiral flow channel molten salt electric heater more uniform and efficient than that of the traditional molten salt electric heater.
[0003] At present, the spiral flow channel design of molten salt electric heater lacks an anti-short-circuit structure: the main function of the spiral baffle is to guide the shell-side fluid to flow horizontally through the heating tube bundle, thereby increasing the heat exchange efficiency and heating uniformity of the equipment. However, due to the gaps between the spiral baffles and the heater shell, and the gaps between the heating tube bundle and the heater shell, the molten salt fluid flows through these gaps to form a short circuit. According to fluid mechanics experiments, the flow rate through this short circuit is measured to account for about 10% of the total flow rate, which greatly reduces the heating effect and causes uneven heating of the equipment. For this reason, we propose an annular spiral flow channel structure for a molten salt electric heater. Utility Model Content
[0004] The utility model aims to provide an annular spiral flow channel structure of a molten salt electric heater to solve the problems raised in the above background technology.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an annular spiral flow channel structure of a molten salt electric heater, comprising a heater shell, a wrapping cylinder is arranged inside the heater shell, both ends of the wrapping cylinder are provided with enlarged ports connected to the inner wall of the heater shell, a central cylinder is arranged inside the wrapping cylinder, a spiral baffle is arranged on the outer peripheral side of the central cylinder, a plurality of electric heating tubes are arranged on the spiral baffle, and an annular spiral flow channel is formed between the wrapping cylinder, the central cylinder and the spiral baffle.
[0006] Preferably, the wrapping cylinder and the enlarged port are an integrally formed structure, and the enlarged port and the inner side wall of the heater housing are welded and sealed.
[0007] Preferably, the inner ring side of the spiral baffle is sealed to the central cylinder, and the outer ring side of the spiral baffle is sealed to the inner wall of the wrapping cylinder.
[0008] Preferably, a plurality of the electric heating tubes are distributed on the spiral baffle in a circular array with the central cylinder as the center.
[0009] Preferably, the spiral baffle is provided with a through hole for the electric heating tube to pass through.
[0010] Preferably, a feed port and a discharge port are respectively provided on the heater housing at two ends corresponding to the wrapping cylinder, and both the feed port and the discharge port are communicated with the annular spiral flow channel.
[0011] Compared with the prior art, the beneficial effects of the utility model are:
[0012] The utility model is provided with a wrapping cylinder, an enlarged port, a central cylinder and a spiral baffle, an annular spiral flow channel is formed between the wrapping cylinder, the central cylinder and the spiral baffle, and the wrapping cylinder with an enlarged port is added to prevent the molten salt medium to be heated from entering the gap between the wrapping cylinder and the heater shell, and avoid 10% of the molten salt medium to be heated from being lost through the gap. An annular spiral flow channel is formed between the wrapping cylinder, the central cylinder and the spiral baffle, forming a stable and closed spiral guide channel. Compared with the existing spiral baffle electric heater, on the one hand, the central low flow velocity area is eliminated, and the poor heat transfer capacity due to the low flow velocity in the center position and the temperature dead zone formed by the excessive local temperature are avoided. On the other hand, the molten salt is avoided from being lost directly through the inner wall of the electric heater cylinder, so that the electric heater fails to have a heating effect on this part of the molten salt, which greatly improves the heating effect of the electric heater and makes the equipment heating more uniform. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a cross-sectional structural schematic diagram of the utility model;
[0014] Figure 2 It is a partial three-dimensional structural schematic diagram of the utility model;
[0015] Figure 3 It is a schematic diagram of the three-dimensional structure of the wrapping cylinder of the utility model.
[0016] In the figure: 1. heater shell; 2. wrapping cylinder; 3. expansion port; 4. central cylinder; 5. spiral baffle; 6. electric heating tube; 7. through hole; 8. feed port; 9. discharge port. DETAILED DESCRIPTION
[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0018] See also Figure 1-Figure 3 The annular spiral flow channel structure of the molten salt electric heater provided by the utility model comprises a heater shell 1, a wrapping cylinder 2 is arranged inside the heater shell 1, both ends of the wrapping cylinder 2 are provided with an enlarged port 3 connected to the inner wall of the heater shell 1, the wrapping cylinder 2 and the enlarged port 3 are an integrally formed structure, the enlarged port 3 and the inner wall of the heater shell 1 are welded and sealed, a central cylinder 4 is arranged inside the wrapping cylinder 2, a spiral baffle 5 is arranged on the outer peripheral side of the central cylinder 4, the inner ring side of the spiral baffle 5 is sealed and connected to the central cylinder 4, and the spiral The outer ring side of the spiral baffle plate 5 is sealed and connected to the inner wall of the wrapping cylinder 2. A plurality of electric heating tubes 6 are arranged on the spiral baffle plate 5. The plurality of electric heating tubes 6 are distributed on the spiral baffle plate 5 in a circular array with the central cylinder 4 as the center. A through hole 7 is opened on the spiral baffle plate 5 for the power heating tube 6 to pass through. An annular spiral flow channel is formed between the wrapping cylinder 2, the central cylinder 4 and the spiral baffle plate 5. A feed port 8 and a discharge port 9 are respectively arranged on the heater shell 1 at the two ends corresponding to the wrapping cylinder 2, and the feed port 8 and the discharge port 9 are both connected to the annular spiral flow channel.
[0019] The utility model is provided with a wrapping cylinder 2, an expansion port 3, a central cylinder 4 and a spiral baffle 5, and an annular spiral flow channel is formed between the wrapping cylinder 2, the central cylinder 4 and the spiral baffle 5. When in use, the molten salt medium to be heated enters the heater shell 1 through the feed port 8, and then enters the annular spiral flow channel from one end of the wrapping cylinder 2 for spiral circulation. At this time, the electric heating tube 6 fully heats the molten salt medium to be heated in the annular spiral flow channel, and the heated molten salt medium is discharged from the other end of the wrapping cylinder 2, and then output from the discharge port 9. In this process, the wrapping cylinder 2 with the expansion port 3 is added to prevent the molten salt medium to be heated from entering the wrapping cylinder 2 and The gap between the heater shells 1 prevents 10% of the molten salt medium to be heated from being lost through the gap, and an annular spiral flow channel is formed between the wrapping cylinder 2, the central cylinder 4 and the spiral baffle 5, forming a stable and closed spiral guide channel. Compared with the existing spiral baffle electric heater, on the one hand, the central low flow velocity area is eliminated to avoid poor heat transfer capacity due to too low flow velocity in the center and excessive local temperature to form a temperature dead zone. On the other hand, the molten salt is prevented from being lost directly through the inner wall of the electric heater cylinder, so that the electric heater fails to heat this part of the molten salt, which greatly improves the heating effect of the electric heater and makes the equipment heating more uniform.
[0020] To sum up, the method of using the annular spiral flow channel structure of the molten salt electric heater provided in this embodiment is as follows: when in use, the molten salt medium to be heated enters the heater shell 1 through the feed port 8, and then enters the annular spiral flow channel from one end of the wrapping cylinder 2 for spiral circulation. At this time, the electric heating tube 6 fully heats the molten salt medium to be heated in the annular spiral flow channel, and the heated molten salt medium is discharged from the other end of the wrapping cylinder 2, and then output from the discharge port 9.
[0021] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. An annular spiral flow channel structure of a molten salt electric heater, characterized in that: The invention comprises a heater shell (1), wherein a wrapping cylinder (2) is arranged inside the heater shell (1), and both ends of the wrapping cylinder (2) are provided with enlarged ports (3) connected to the inner wall of the heater shell (1), and a central cylinder (4) is arranged inside the wrapping cylinder (2), and a spiral baffle (5) is arranged on the outer peripheral side of the central cylinder (4), and a plurality of electric heating tubes (6) are arranged on the spiral baffle (5), and an annular spiral flow channel is formed between the wrapping cylinder (2), the central cylinder (4) and the spiral baffle (5).
2. The annular spiral flow channel structure of a molten salt electric heater according to claim 1 is characterized in that: The wrapping cylinder (2) and the enlarged port (3) are an integrally formed structure, and the enlarged port (3) and the inner side wall of the heater housing (1) are welded and sealed.
3. The annular spiral flow channel structure of a molten salt electric heater according to claim 1, characterized in that: The inner ring side of the spiral baffle (5) is sealed to the central cylinder (4), and the outer ring side of the spiral baffle (5) is sealed to the inner wall of the wrapping cylinder (2).
4. The annular spiral flow channel structure of a molten salt electric heater according to claim 1, characterized in that: A plurality of the electric heating tubes (6) are distributed on the spiral baffle (5) in a ring array with the central cylinder (4) as the center.
5. The annular spiral flow channel structure of a molten salt electric heater according to claim 1, characterized in that: The spiral baffle plate (5) is provided with a through hole (7) for the electric heating tube (6) to pass through.
6. The annular spiral flow channel structure of a molten salt electric heater according to claim 1, characterized in that: A feed port (8) and a discharge port (9) are respectively provided on the heater housing (1) at two ends corresponding to the wrapping cylinder (2); the feed port (8) and the discharge port (9) are both in communication with the annular spiral flow channel.