Integrated alumina fiber polycrystalline tube radiation heat exchanger

Abstract

The utility model discloses an integrated alumina fibre polycrystalline tube radiant heat exchanger relates to the technical field of radiant heat exchanger. Including radiant heat exchanger main part, the inside fixed coupling of radiant heat exchanger main part has the inner tube, and the flow guide replacement structure, and the flow guide replacement structure is located on the inner tube, and the flow guide replacement structure includes the fixed ring, four positioning plates, spiral blade, four bolts and the installation ring, and the both sides of inner tube are all seted up with the installation slot, and the inside of inner tube is seted up with four positioning slots, and the fixed ring slidingly connects in the inside of corresponding installation slot, and four positioning plates all are fixedly connected in one side of fixed ring, and an integrated alumina fibre polycrystalline tube radiant heat exchanger is through the cooperation of bolt, screw thread hole, through -hole, locating post and locating hole etc. Structure, make the dismounting process of spiral blade simple and quick, when spiral blade appears abrasion or needs cleaning, can replace or maintain quickly, has reduced the downtime of equipment, has reduced maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of radiation heat exchanger technology, and in particular to an integrated alumina fiber polycrystalline tube radiation heat exchanger. Background Technology

[0002] Integrated alumina fiber polycrystalline tube radiant heat exchangers are widely used in fields such as industrial kiln flue gas waste heat recovery and high-temperature gas heat exchange, thanks to the excellent high temperature resistance (can withstand temperatures above 1200℃ for a long time) and low thermal conductivity of alumina fiber polycrystalline tubes.

[0003] Traditional cylindrical radiant heat exchangers typically have smooth inner walls or fixed welded spiral flow guide structures. Smooth inner walls make it difficult to guide the medium to form turbulence, and high-temperature media tend to flow quickly in a straight line, resulting in short contact time with the polycrystalline tubes, insufficient heat exchange, and low thermal efficiency. While fixed welded spiral blades can extend the medium path and enhance turbulence, they are prone to wear or scaling due to dust adhesion and particle erosion in high-temperature flue gas over long-term use. Furthermore, the blades are rigidly connected to the inner wall, and once damaged or severely scaled, the entire inner wall needs to be disassembled and replaced, which seriously affects continuous production. Therefore, we propose an integrated alumina fiber polycrystalline tube radiant heat exchanger. Utility Model Content

[0004] The purpose of this utility model is to solve at least one of the technical problems existing in the prior art, and to provide an integrated alumina fiber polycrystalline tube radiant heat exchanger. This solves the problem that the inner cylinder of traditional cylindrical radiant heat exchangers is mostly a smooth cylinder wall or a fixed welded spiral flow guiding structure. The smooth inner cylinder makes it difficult to guide the medium to form turbulence, and the high-temperature medium tends to flow quickly in a straight line, resulting in short contact time with the polycrystalline tube, insufficient heat exchange, and low thermal efficiency. Although the fixed welded spiral blades can extend the medium path and enhance turbulence, they are prone to wear or scaling due to dust adhesion and particle erosion in high-temperature flue gas during long-term use. In addition, the blades are rigidly connected to the inner cylinder. Once damaged or severely scaled, the entire inner cylinder needs to be disassembled and replaced, which seriously affects continuous production.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an integrated alumina fiber polycrystalline tube radiant heat exchanger, comprising:

[0006] The main body of the radiant heat exchanger has an inner cylinder fixedly connected inside it;

[0007] The flow guide and replacement structure is located on the inner cylinder.

[0008] The flow guide replacement structure includes a fixed ring, four positioning plates, a spiral blade, four bolts, and a mounting ring. Mounting grooves are provided on both sides of the inner cylinder, and four positioning grooves are provided inside the inner cylinder. The fixed ring is slidably connected to the inside of the corresponding mounting groove. The four positioning plates are fixedly connected to one side of the fixed ring and slidably connected to the inside of the corresponding positioning groove. The mounting ring is slidably connected to the inside of the corresponding mounting groove. Four threaded holes are provided in the mounting groove near the mounting ring, and four through holes are provided on the mounting ring. The four bolts pass through the corresponding through holes and are threadedly connected to the corresponding threaded holes. The spiral blade is fixedly connected between the four positioning plates.

[0009] Preferably, the mounting ring has four positioning holes, and four positioning posts are fixedly connected in the mounting groove near the mounting ring, with each of the four positioning posts being inserted into the corresponding positioning hole.

[0010] Preferably, an air inlet pipe is fixedly connected to the outer surface of the radiant heat exchanger body, and the air inlet pipe communicates with the interior of the radiant heat exchanger body.

[0011] Preferably, an exhaust pipe is fixedly connected to the outer surface of the radiant heat exchanger body, and the exhaust pipe communicates with the interior of the radiant heat exchanger body.

[0012] Preferably, one end of the inner cylinder is configured as an exhaust port, and the end of the inner cylinder away from the exhaust port is configured as an air inlet.

[0013] Preferably, both the positioning plate and the positioning groove are semi-circular structures.

[0014] Preferably, the outer wall of the spiral blade is in contact with the inner wall of the inner cylinder.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. This integrated alumina fiber polycrystalline tube radiant heat exchanger, through the combination of bolts, threaded holes, through holes, positioning columns and positioning holes, makes the disassembly and assembly of the spiral blades simple and quick. When the spiral blades are worn or need cleaning, they can be quickly replaced or maintained, reducing equipment downtime and lowering maintenance costs. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0018] Figure 1 This is a schematic cross-sectional view of the main body of the radiant heat exchanger of this utility model.

[0019] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention;

[0020] Figure 3 This is a schematic diagram of the cross-sectional structure of the inner cylinder of this utility model;

[0021] Figure 4 This is a schematic diagram of the mounting ring structure of this utility model;

[0022] Figure 5 This is a schematic diagram of the spiral blade structure of this utility model.

[0023] Reference numerals in the attached drawings: 1. Main body of radiant heat exchanger; 2. Inner cylinder; 3. Inlet pipe; 4. Outlet pipe; 5. Fixing ring; 6. Positioning plate; 7. Spiral blade; 8. Mounting ring; 9. Positioning groove; 10. Positioning post; 11. Threaded hole; 12. Mounting groove; 13. Through hole; 14. Positioning hole; 15. Bolt; 16. Exhaust port; 17. Inlet port. Detailed Implementation

[0024] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0025] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] In the description of this utility model, terms such as greater than, less than, and exceeding are understood to exclude the stated number, while terms such as above, below, and within are understood to include the stated number. The use of terms like "first" and "second" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the quantity or sequence of the indicated technical features.

[0027] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0028] Radiant heat exchanger body 1: As the outer shell of the heat exchanger, it provides installation space and protection for the inner cylinder 2 and the internal flow guide replacement structure, and at the same time forms an annular channel between it and the inner cylinder 2 to allow low-temperature gas to circulate and participate in heat exchange.

[0029] Inner cylinder 2: Located inside the main body 1 of the radiant heat exchanger, it is a channel for the flow of high-temperature gas. Its inner wall is in contact with the spiral blades 7, which can absorb the heat transferred by the high-temperature gas and radiate it to the low-temperature gas on the outside to achieve heat transfer.

[0030] Inlet pipe 3: Fixed on the outer surface of the radiant heat exchanger body 1, communicating with the space between the radiant heat exchanger body 1 and the inner cylinder 2, used to introduce low-temperature gas into the space to provide a low-temperature medium for heat exchange;

[0031] Gas outlet pipe 4: Fixed on the outer surface of the radiant heat exchanger body 1, communicating with the space between the radiant heat exchanger body 1 and the inner cylinder 2, and exporting the low-temperature gas whose temperature rises after absorbing heat, thus completing the low-temperature gas transportation after heat exchange.

[0032] Fixed ring 5: It is slidably connected in the corresponding mounting groove 12 and fixedly connected to the four positioning plates 6. It serves to fix the positioning plates 6 and the spiral blades 7, and facilitates their sliding in the mounting groove 12 to achieve disassembly and assembly.

[0033] Positioning plate 6: Fixed on one side of the fixing ring 5, and slidably connected in the corresponding positioning groove 9. Because it has a semi-circular structure and is compatible with the positioning groove 9, it can position the spiral blade 7 to ensure that its installation position is accurate and stable.

[0034] Spiral blade 7: Fixed between four positioning plates 6, with its outer wall in contact with the inner wall of the inner cylinder 2, it can guide the high-temperature gas to flow in a spiral shape in the inner cylinder 2, increasing the flow path and residence time of the high-temperature gas, so that the high-temperature gas can fully contact the inner wall of the inner cylinder 2 to efficiently transfer heat.

[0035] Mounting ring 8: It is slidably connected in the corresponding mounting groove 12 and fixed by four bolts 15. It is used to fix the fixing ring 5, positioning plate 6 and spiral blade 7 as a whole in the mounting groove 12 to prevent them from shifting under the impact of high temperature gas.

[0036] Positioning groove 9: It is opened inside the inner cylinder 2 and has a semi-circular structure that is adapted to the positioning plate 6. It provides a sliding track and positioning reference for the positioning plate 6, ensuring the fitting accuracy between the spiral blade 7 and the inner wall of the inner cylinder 2.

[0037] Positioning pin 10: It is fixed in the mounting groove 12 near the mounting ring 8 and is inserted into the positioning hole 14 on the mounting ring 8. It plays a positioning role in the installation of the mounting ring 8 and ensures that the mounting ring 8 is accurately installed in the mounting groove 12.

[0038] Threaded hole 11: It is formed in the mounting groove 12 near the mounting ring 8 and is threaded to the bolt 15 passing through the through hole 13, providing a threaded connection point for fixing the mounting ring 8;

[0039] Mounting slot 12: Provides sliding and mounting space for fixing ring 5 and mounting ring 8, facilitating the overall disassembly and assembly of the guide replacement structure;

[0040] Through hole 13: It is formed on the mounting ring 8 for the bolt 15 to pass through to connect with the threaded hole 11, and is a necessary structure for fixing the mounting ring 8;

[0041] Positioning hole 14: It is opened on the mounting ring 8 and is inserted into the positioning post 10. It works with the positioning post 10 to achieve precise positioning of the mounting ring 8 and ensure that the bolt 15 can accurately pass through the through hole 13 and connect with the threaded hole 11.

[0042] Bolt 15: Passes through the through hole 13 and is threaded into the threaded hole 11 to fix the mounting ring 8 in the mounting groove 12, thereby fixing the entire flow guide replacement structure;

[0043] Exhaust port 16: Located at one end of the inner cylinder 2, it is the outlet where the temperature of the high-temperature gas decreases after heat exchange in the inner cylinder 2, and is used to exhaust the low-temperature gas out of the inner cylinder 2.

[0044] Air inlet 17: Located at the end of the inner cylinder 2 away from the exhaust port 16, it is the inlet for high-temperature gas to enter the inner cylinder 2 and provides a high-temperature medium for heat exchange inside the inner cylinder 2.

[0045] Example 1:

[0046] like Figure 1-4 As shown, when the spiral blade 7 needs to be replaced or maintained, the bolt 15 can be unscrewed to release the fixing of the mounting ring 8. Since the mounting ring 8 has four positioning holes 14, and four positioning posts 10 are fixedly connected in the mounting groove 12 near the mounting ring 8, the four positioning posts 10 are all inserted into the corresponding positioning holes 14. The positioning posts 10 and the positioning holes 14 play a positioning role, which facilitates the accurate installation and removal of the mounting ring 8. After the mounting ring 8 is removed, the fixing ring 5 can drive the positioning plate 6 and the spiral blade 7 to slide out from the mounting groove 12, thereby completing the disassembly of the flow guide replacement structure.

[0047] Example 2:

[0048] like Figure 5 As shown, in this embodiment, the spiral blade 7 is changed to a three-segment structure. Each spiral blade has an independent spiral shape and size. It is customized according to the actual flow guidance requirements and fluid characteristics. The three spiral blades 7 are connected to each other to form a complete spiral flow guidance system, which can more accurately control the flow direction and speed of the fluid and improve the flow guidance effect.

[0049] Furthermore, when using the device, high-temperature gas enters the interior of the inner cylinder 2 through the air inlet 17 at one end of the inner cylinder 2, and low-temperature gas enters the space between the radiant heat exchanger body 1 and the inner cylinder 2 through the air inlet pipe 3.

[0050] Guided by the spiral blades 7, the high-temperature gas flows in a spiral shape, which greatly increases the flow path and residence time of the gas in the inner cylinder 2. At the same time, the outer wall of the spiral blades 7 is in close contact with the inner wall of the inner cylinder 2, so that the high-temperature gas can fully contact the inner cylinder 2 wall and efficiently transfer heat to the inner cylinder 2. After absorbing the heat, the inner cylinder 2 radiates the heat to the low-temperature gas in the space between the radiant heat exchanger body 1 and the inner cylinder 2, realizing heat exchange. After heat exchange, the temperature of the low-temperature gas rises and is discharged from the outlet pipe 4; the temperature of the high-temperature gas decreases and is discharged from the exhaust port 16 at the other end of the inner cylinder 2.

[0051] When the spiral blade 7 needs to be replaced or maintained, the bolt 15 can be unscrewed to release the fixing of the mounting ring 8. Since the mounting ring 8 has four positioning holes 14, and four positioning posts 10 are fixedly connected in the mounting groove 12 near the mounting ring 8, the four positioning posts 10 are inserted into the corresponding positioning holes 14. The positioning posts 10 and positioning holes 14 play a positioning role, which facilitates the accurate installation and removal of the mounting ring 8. After the mounting ring 8 is removed, the fixing ring 5 can drive the positioning plate 6 and the spiral blade 7 to slide out of the mounting groove 12, thereby completing the disassembly of the flow guide replacement structure. During installation, the reverse steps are followed.

[0052] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. An integrated alumina fiber polycrystalline tube radiant heat exchanger, characterized in that, include: The main body of the radiant heat exchanger (1) is fixedly connected to the inner cylinder (2); The flow guide replacement structure is located on the inner cylinder (2); The flow guide replacement structure includes a fixed ring (5), four positioning plates (6), a spiral blade (7), four bolts (15) and an installation ring (8). The inner cylinder (2) has installation grooves (12) on both sides and four positioning grooves (9) inside. The fixed ring (5) is slidably connected to the inside of the corresponding installation groove (12), and the four positioning plates (6) are fixedly connected to one side of the fixed ring (5). Among them, the four positioning plates (6) are slidably connected inside the corresponding positioning groove (9), the mounting ring (8) is slidably connected inside the corresponding mounting groove (12), the mounting groove (12) near the mounting ring (8) is provided with four threaded holes (11), the mounting ring (8) is provided with four through holes (13), the four bolts (15) pass through the corresponding through holes (13) and are threadedly connected to the corresponding threaded holes (11), and the spiral blade (7) is fixedly connected between the four positioning plates (6); The mounting ring (8) has four positioning holes (14), and four positioning posts (10) are fixedly connected in the mounting groove (12) near the mounting ring (8). The four positioning posts (10) are all inserted into the corresponding positioning holes (14).

2. The integrated alumina fiber polycrystalline tube radiant heat exchanger according to claim 1, characterized in that: An air inlet pipe (3) is fixedly connected to the outer surface of the radiant heat exchanger body (1), and the air inlet pipe (3) is connected to the interior of the radiant heat exchanger body (1).

3. The integrated alumina fiber polycrystalline tube radiant heat exchanger according to claim 1, characterized in that: An exhaust pipe (4) is fixedly connected to the outer surface of the radiant heat exchanger body (1), and the exhaust pipe (4) is connected to the interior of the radiant heat exchanger body (1).

4. The integrated alumina fiber polycrystalline tube radiant heat exchanger according to claim 1, characterized in that: One end of the inner cylinder (2) is configured as an exhaust port (16), and the other end of the inner cylinder (2) away from the exhaust port (16) is configured as an air inlet (17).

5. An integrated alumina fiber polycrystalline tube radiant heat exchanger according to claim 1, characterized in that: Both the positioning plate (6) and the positioning groove (9) are semi-circular structures.

6. An integrated alumina fiber polycrystalline tube radiant heat exchanger according to claim 1, characterized in that: The outer wall of the spiral blade (7) is attached to the inner wall of the inner cylinder (2).

Images