H-shaped fin heat exchange element with heat exchange rods
By setting heat exchange rods on the H-shaped fin body and optimizing the fin design, the shortcomings of existing H-shaped finned tubes in heat exchange efficiency and wear resistance are solved, achieving a more efficient heat exchange effect and stronger wear resistance.
Patent Information
- Application Number
- CN202520468459.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-18
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2035-03-18
AI Technical Summary
There is room for further improvement in the heat exchange efficiency and wear resistance of existing H-type finned tubes.
Multiple heat exchange rods are provided through holes on the H-shaped fin body, and the heat exchange rods are fixedly connected to the H-shaped fin body by welding to form an H-shaped fin structure with heat exchange rods. The fin design is optimized to increase the heating surface and turbulence effect.
It improves heat exchange efficiency, reduces ash accumulation and wear, enhances resistance to fly ash abrasion, and is simple to manufacture.
Smart Images
Figure CN223678267U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to heat exchange component technical field, especially a kind of H type fin heat exchange element of heat exchange rod with. BACKGROUND
[0002] H type finned tube, also known as H type finned tube or butterfly finned tube, is formed by two symmetrical steel sheets with circular arc in the middle and welded with light pipe. The structure is similar to the letter "H" in front view, so it is called H type finned tube. The two fins of H type finned tube are rectangular, approximately square, and the side length is about 2 times the length of the light pipe, which belongs to the expanded heating surface. This design can increase the heat exchange area, increase the smoke flow cross section, reduce the smoke velocity and reduce the wear. In addition, H type finned tube itself has the function of concentrating fly ash to the middle of the tube row, so the structure reduces the wear problem.
[0003] H type finned tube has an additional heating surface with a high expansion coefficient. The economizer composed of H type finned tube as heat transfer element has excellent anti-fly ash wear performance, compact structure, convenient for the arrangement of boiler tail heating surface and can save construction cost, etc. It is widely used in China.
[0004] Although H type finned tube has been widely used for a long time, H type finned heat exchange element can be further improved. CONTENT OF THE UTILITY MODEL
[0005] The utility model is just aimed at the above problems, provide a kind of H type fin heat exchange element of heat exchange rod with.
[0006] To achieve the above object, the utility model adopts the following technical scheme, the utility model includes H type fin body, H type fin body is provided with heat exchange pipe through hole, it is characterized in that H type fin body is provided with heat exchange rod through hole, heat exchange rod passes through heat exchange rod through hole and is connected with H type fin body.
[0007] As a preferred scheme, the heat exchange rod through hole of the utility model is a plurality of, and each heat exchange rod through hole corresponds to a heat exchange rod.
[0008] As another preferred scheme, the heat exchange rod through hole of the utility model is arranged at the corner of H type fin body.
[0009] As another preferred scheme, the heat exchange rod through hole of the utility model is four, and is arranged at the four corners of H type fin body.
[0010] As another preferred scheme, the H type fin body of the utility model is a plurality of, and the plurality of H type fin bodies are arranged in parallel at equal intervals, the horizontal projection of each H type fin body is coincident, and the heat exchange rod passes through the heat exchange rod through hole at the corresponding position of each H type fin body.
[0011] As another preferred scheme, the heat exchange rod is welded with the H-shaped fin body at the position where the heat exchange rod passes through the hole.
[0012] As another preferred scheme, the heat exchange rod adopts a cylindrical rod or a threaded rod.
[0013] Secondly, the interval s of the adjacent H-shaped fin bodies is 1-1.5 times of the thickness b of the H-shaped fin body.
[0014] In addition, the length h of the H-shaped fin body is 145 mm, the width 2a of the H-shaped fin body is 70 mm, the thickness b of the H-shaped fin body is 3 mm, and the diameter of the heat exchange rod is 3 mm.
[0015] The utility model has the advantages that:
[0016] The utility model adds the heat exchange rod on the basis of the existing H-shaped fin, so that the heating surface can be further increased, and the heat exchange efficiency can be improved. BRIEF DESCRIPTION OF DRAWINGS
[0017] The utility model will be further described below in combination with the drawings and specific embodiments. The protection scope of the utility model is not limited to the following content.
[0018] Figure 1 It is a structural schematic view of the utility model.
[0019] Figure 2 It is a side view of the utility model.
[0020] Figure 3 It is a front view of the utility model.
[0021] Figure 4 It is a finite element analysis comparison schematic view of the utility model and the existing H-shaped fin heat exchange element.
[0022] Figure 5 It is a temperature comparison schematic view of the utility model and the existing H-shaped fin heat exchange element.
[0023] In the drawing, 1 is a heat exchange pipe, 2 is an H-shaped fin body, and 3 is a heat exchange rod.
[0024] Figure 6 It is a comparison view of the heat exchange rod of the utility model arranged in different ways.
[0025] Figure 7 It is an illustration that the cylindrical rod is not easy to accumulate dust for the heat exchange rod of the utility model. DETAILED DESCRIPTION
[0026] As shown in the figure, the utility model discloses a H type fin body 2, be provided with heat exchange pipe through -hole on H type fin body 2, be provided with heat exchange rod through -hole on H type fin body 2, heat exchange rod 3 passes through heat exchange rod through -hole and links to each other with H type fin body 2.
[0027] Heat exchange pipe 1 passes through the through -hole on H type fin body 2, and the through -hole is fixedly connected with H type fin body 2 as a whole by welding on both sides, and constitutes H type finned tube.
[0028] The heat exchange rod through -hole is multiple, and each heat exchange rod through -hole corresponds to one heat exchange rod 3.
[0029] The heat exchange rod through -hole is arranged at the corner of H type fin body 2. In the working process, the corner of H type fin body 2 contacts flue gas first, and the temperature is higher. The heat exchange rod 3 is arranged at the position of higher temperature, and the heat exchange effect is better.
[0030] The heat exchange rod through -hole is four, and is arranged at the four corners of H type fin body 2. Figure 6 It can be known that the heat exchange rod four corners arrangement, the heat exchange rod 3 and the three anchor points of the heat exchange rod 3 form the maximum triangular area, so that it is more stable; the heat exchange rod 3 can contact high-temperature flue gas faster, and the heat exchange effect is better; the area formed between the heat exchange rod 3 and the heat exchange pipe 1 is maximum, and the ash accumulation is reduced.
[0031] The H type fin body 2 is multiple, and the multiple H type fin bodies 2 are arranged in parallel at equal intervals, the horizontal projections of the H type fin bodies 2 coincide, and the heat exchange rod 3 passes through the heat exchange rod through -hole at the corresponding position of each H type fin body 2.
[0032] The heat exchange rod 3 is welded with H type fin body 2 at the heat exchange rod through -hole. The heat exchange rod through -hole can be made by stamping, and the heat exchange rod 3 is inserted into the heat exchange rod through -hole and is welded and fixed on both sides of the heat exchange rod through -hole.
[0033] The heat exchange rod 3 adopts a cylindrical rod or a threaded rod. The cylindrical rod or the threaded rod is simple to produce and manufacture, and the surface is curved, so that the ash accumulation is not easy. By Figure 7 It can be known that the circular cross section area is minimum, the area removed by the fin is minimum, under the same width, in each cross section, the total heat exchange area (heat exchange rod heat exchange area + fin heat exchange area) of the circular cross section is maximum. The cylindrical rod is easy to purchase and process in actual production. The threaded rod is processed on the basis of the cylindrical rod, and further increases the heat exchange area.
[0034] The spacing s of the adjacent H type fin bodies 2 is 1-1.5 times of the thickness b of the H type fin body 2.
[0035] The greater the spacing s of the adjacent H type fin bodies 2, the more heat exchange area can be provided by the heat exchange rod 3.
[0036] The length h of the H-shaped fin body 2 is 145mm, the width 2a of the H-shaped fin body 2 is 70mm, the thickness b of the H-shaped fin body 2 is 3mm, and the diameter of the heat exchange rod 3 is 3mm.
[0037] The utility model discloses on the basis of the existing H-shaped fin additionally sets up heat exchange rod 3, can further increase the heating surface, improve the heat exchange efficiency. The length, width and thickness of the H-shaped fin body 2 are h, 2a and b respectively, the diameter of the heat exchange rod 3 is φb (taking the fin thickness), and the fin spacing is s. For a single fin, the heat exchange area of the existing H-shaped fin is Ao=2ab+2ah+bh.
[0038] Ag=2ab+2ah+bh+(2πbs-4π(b / 2) 2 )
[0039] =2ab+2ah+bh+(2πbs-πb 2 )
[0040] =2ab+2ah+bh+πb(2s-b)
[0041] Wherein πb (2s-b) is the increased heat exchange area of the utility model compared with the existing H-shaped fin for a single fin.
[0042] If a=35mm, b=3mm, h=145mm and s=1~1.5b,
[0043] Ao=10795mm 2 ;
[0044] Ag=10795+28.3~56.6=10823.3~10851.6mm 2
[0045] n=(Ag-Ao) / Ao=0.22%~0.52%, unit heat exchange area increase ratio, only in the heat exchange area factor can improve the heat exchange effect 0.22%~0.52%.
[0046] From Figure 4 , Figure 5 It can be known that, due to the utility model additionally sets up heat exchange rod 3, plays a certain spoiler effect, can also improve the heat exchange efficiency in the local formation of the karman vortex street.
[0047] From Figure 4 , Figure 5 It can be known that, in the case that the water temperature in the heat exchange pipe 1 is the same, the H-shaped fin body 2 with heat exchange rod 3 needs less temperature drop of flue gas, so the heat exchange effect is good.
[0048] Overall, the H-shaped fin with heat exchange rod 3 can improve the heat exchange effect by at least 0.65%. Moreover, through finite element simulation (FEM) and according to the temperature distribution, it is concluded that the heat exchange effect of the H-shaped fin with heat exchange rod 3 is superior to that of the conventional H-shaped fin. In terms of production and manufacturing, the present application has no manufacturing difficulties compared with the conventional H-shaped fin. Figure 4
[0049] The present application can be applied to a boiler economizer to improve the overall heat exchange efficiency of the boiler economizer, but is not limited to this application, and can also be applied to other heat exchange equipment.
[0050] It can be understood that the above specific description of the present application is only used to illustrate the present application and is not limited to the technical solutions described in the embodiments of the present application. Those skilled in the art should understand that the present application can still be modified or replaced equivalently to achieve the same technical effect; as long as the use needs are met, it is within the protection scope of the present application.
Claims
1. A heat exchanging element with heat exchanging rods, comprising an H-shaped fin body, wherein a heat exchanging pipe through hole is arranged on the H-shaped fin body, characterized in that The H-shaped fin body is provided with a heat exchange rod through hole, and the heat exchange rod passes through the heat exchange rod through hole and is connected with the H-shaped fin body.
2. The H-shaped fin heat exchange element with heat exchange rods according to claim 1, characterized in that The heat exchange rod through hole is a plurality of holes, and each heat exchange rod through hole corresponds to a heat exchange rod.
3. The H-shaped fin heat exchanging element with heat exchanging rods according to claim 1, characterized in that The heat exchange rod through hole is arranged at the corner of the H-shaped fin body.
4. The H-shaped fin heat exchanging element with heat exchanging rods according to claim 1, characterized in that The heat exchange rod through hole is four holes arranged at the four corners of the H-shaped fin body.
5. The H-shaped fin heat exchanging element with heat exchanging rods according to claim 1, characterized in that The H-shaped fin body is a plurality of H-shaped fin bodies arranged in parallel at equal intervals, the horizontal projections of the H-shaped fin bodies coincide, and the heat exchange rods pass through the heat exchange rod through holes at the corresponding positions of the H-shaped fin bodies.
6. The H-shaped fin heat exchanging element with heat exchanging rods according to claim 1, characterized in that The heat exchange rod is welded with the H-shaped fin body at the heat exchange rod through hole.
7. The H-shaped fin heat exchanging element with heat exchanging rods according to claim 1, characterized in that The heat exchange rod is a cylindrical rod or a threaded rod.
8. The H-shaped fin heat exchanging element with heat exchanging rods according to claim 5, characterized in that The distance s between adjacent H-shaped fin bodies is 1-1.5 times the thickness b of the H-shaped fin body.
9. The H-shaped fin heat exchanging element with heat exchanging rods according to claim 1, characterized in that The length h of the H-shaped fin body is 145 mm, the width 2a of the H-shaped fin body is 70 mm, the thickness b of the H-shaped fin body is 3 mm, and the diameter of the heat exchange rod is 3 mm.