Heat exchange tube of steam generator

Abstract

The utility model relates to the technical field of heat exchange tubes, and discloses a steam generator heat exchange tube which comprises an outer tube, a first protruding rib fixedly arranged in the outer tube, a second protruding rib fixedly arranged in the outer tube, a third protruding rib fixedly arranged in the outer tube, and a third protruding rib fixedly arranged in the outer tube. A fourth protruding rib is fixedly arranged in the outer pipe, and a first inner pipe is fixedly installed at the lower end of the first protruding rib. According to the heat exchange tube of the steam generator, the three-layer tube structure and the special design of the inner tube and the outer tube are adopted, so that the heat exchange area is remarkably increased, the heat exchange efficiency is improved, heat transfer and exchange can be more effectively achieved, energy is saved, and the working efficiency of heat exchange equipment is improved; the axial protruding ribs on the inner wall of the inner pipe and the hemispherical protrusions on the outer wall of the outer pipe improve the flowing state of fluid inside and outside the pipe respectively, the disturbance and turbulence degree of the fluid is enhanced, the heat exchange effect is further improved, and heat exchange is more sufficient and faster.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchange tubes, and specifically relates to a heat exchange tube for a steam generator. Background Art

[0002] Steam generators are widely used in many industrial fields. As a key component, their heat exchange tubes play a crucial role in heat transfer and steam generation.

[0003] In the prior art, the patent document with the publication number CN206556471U discloses an improved heat exchange tube structure of a steam generator. The utility model provides an improved heat exchange tube structure of a steam generator, which relates to the technical field of heat recovery equipment for sulfuric acid production. The heat exchange tube bundle is arranged in a U shape on the same tube sheet. By changing the outer wall structure form of the U-shaped heat exchange tube, the heat exchange efficiency is improved. The heat exchange area is reduced on a single tube sheet, and the expansion problem of the heat exchange tube is solved. The outer wall of the U-shaped heat exchange tube of the high-efficiency steam generator is processed into T-shaped grooves, and the T-shaped grooves are evenly distributed on the outer wall of the tube, so that the wall temperature superheat degree is much lower than that of a smooth tube, and boiling can be maintained at a very low temperature difference, thereby improving the steam production rate of the device. This structure is simple and practical, safe and reliable, economical and practical, and has good use effects. It can be widely used in occasions such as strengthening boiling heat transfer outside the tube, such as kettle-type, horizontal reboilers and surface evaporators, and equipment such as bottom reboilers in the petroleum, chemical and refining industries.

[0004] When an improved heat exchange tube structure of the prior art is actually used, there are some deficiencies. For example, the heat exchange efficiency needs to be improved, the heat transfer is not sufficient, resulting in low energy utilization rate. Summary of the Utility Model

[0005] (1) Technical Problem to be Solved

[0006] The purpose of the utility model is to provide a heat exchange tube for a steam generator, so as to solve the problem of low energy utilization rate caused by the insufficient heat exchange efficiency and insufficient heat transfer proposed in the above background art.

[0007] (2) Technical Solution

[0008] To achieve the above purpose, the utility model provides the following technical solution: A heat exchange tube for a steam generator includes an outer tube. A first raised rib is fixedly arranged inside the outer tube. A second raised rib is fixedly arranged inside the outer tube. A third raised rib is fixedly arranged inside the outer tube. A fourth raised rib is fixedly arranged inside the outer tube. A first inner tube is fixedly installed at the lower end of the first raised rib. A first cavity is provided between the outer tube and the first inner tube. The first raised rib, the second raised rib, the third raised rib and the third raised rib are fixedly connected between the outer tube and the first inner tube.

[0009] Preferably, a fifth raised rib is fixedly installed at the lower end inside the first inner tube, and a sixth raised rib is fixedly installed at the upper end inside the first inner tube.

[0010] Preferably, a seventh raised rib is fixedly installed at the left end inside the first inner tube, and an eighth raised rib is fixedly installed at the right end inside the first inner tube. A second inner tube is fixedly installed inside the first inner tube.

[0011] Preferably, the fifth raised rib, the sixth raised rib, the seventh raised rib, and the eighth raised rib are fixedly connected between the first inner tube and the second inner tube.

[0012] Preferably, a second cavity is provided between the first inner tube and the second inner tube.

[0013] Preferably, a plurality of hemispherical protrusions are evenly distributed on the surface of the outer tube.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] 1. For this heat exchange tube of the steam generator, a first inner tube is fixedly arranged inside the outer tube, and a second inner tube is arranged inside the first inner tube, and cavities are formed between the tubes. This device adopts a three-layer structure design, which increases the heat exchange area, enabling heat to be transferred more fully between the tubes. By setting ribs, these axial raised ribs can guide the fluid inside the tube to form axial turbulence, increasing the degree of fluid disturbance, thereby improving the heat transfer coefficient between the fluid and the tube wall and enhancing the heat exchange effect. Moreover, the existence of the ribs can also, to a certain extent, disrupt the development of the fluid boundary layer, further promoting heat transfer. A plurality of hemispherical protrusions are evenly distributed on the outer wall of the outer tube. The hemispherical protrusions increase the outer surface area of the outer tube, increasing the contact area with the external heat exchange medium, which is beneficial to improving the heat exchange efficiency. At the same time, the hemispherical protrusions can also play a role in disturbing the external fluid, making the fluid form a more complex flow state outside the tube and promoting heat exchange.

[0016] 2. For this heat exchange tube of the steam generator, the outer tube, the first inner tube, and the second inner tube are all made of high-strength corrosion-resistant materials. For example, an alloy material of stainless steel and copper can be selected, which not only ensures the strength of the material, can withstand a certain amount of pressure and mechanical stress, but also improves the corrosion resistance, extends the service life of the heat exchange tube, and reduces problems such as performance degradation and leakage caused by corrosion. At the same time, this material also has certain help for anti-scaling, reducing the rate and degree of scaling. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0018] Figure 2Schematic diagram of the three-dimensional structure of the first raised rib of the present utility model;

[0019] Figure 3 Schematic diagram of the three-dimensional structure of the outer tube of the present utility model;

[0020] Figure 4 Schematic diagram of the enlarged structure of the local details of the present utility model.

[0021] In the figure: 1. Outer tube; 2. First raised rib; 3. Second raised rib; 4. Third raised rib; 5. Fourth raised rib; 6. First inner tube; 7. First cavity; 8. Fifth raised rib; 9. Sixth raised rib; 10. Seventh raised rib; 11. Eighth raised rib; 12. Second inner tube; 13. Second cavity; 14. Hemispherical projection. Specific embodiments

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0023] Please refer to Figure 1 - Figure 4 , the present utility model provides a technical solution: a heat exchange tube of a steam generator, including an outer tube 1, a first raised rib 2 is fixedly arranged inside the outer tube 1, a second raised rib 3 is fixedly arranged inside the outer tube 1, a third raised rib 4 is fixedly arranged inside the outer tube 1, a fourth raised rib 5 is fixedly arranged inside the outer tube 1, a first inner tube 6 is fixedly installed at the lower end of the first raised rib 2, a first cavity 7 is provided between the outer tube 1 and the first inner tube 6, and the first raised rib 2, the second raised rib 3, the third raised rib 4 and the third raised rib 4 are fixedly connected between the outer tube 1 and the first inner tube 6.

[0024] At the lower end inside the first inner tube 6, a fifth raised rib 8 is fixedly installed. At the upper end inside the first inner tube 6, a sixth raised rib 9 is fixedly installed. At the left end inside the first inner tube 6, a seventh raised rib 10 is fixedly installed. At the right end inside the first inner tube 6, an eighth raised rib 11 is fixedly installed. Inside the first inner tube 6, a second inner tube 12 is fixedly installed. When the heat exchange tube of the steam generator needs to be used, the first inner tube 6 is fixedly arranged inside the outer tube 1. The second inner tube 12 is arranged inside the first inner tube 6, and a cavity is formed between the tubes. The device adopts a three-layer structure design, increasing the heat exchange area, enabling heat to be transferred more fully between the tubes. By setting the ribs, these axial raised ribs can guide the fluid inside the tube to form axial turbulence, increasing the degree of fluid disturbance, thereby improving the heat transfer coefficient between the fluid and the tube wall and enhancing the heat exchange effect. Moreover, the existence of the ribs can also, to a certain extent, disrupt the development of the fluid boundary layer and further promote heat transfer. On the outer wall of the outer tube 1, a number of hemispherical protrusions 14 are evenly distributed. The hemispherical protrusions 14 increase the outer surface area of the outer tube 1, increasing the contact area with the external heat exchange medium, which is beneficial to improving the heat exchange efficiency. At the same time, the hemispherical protrusions 14 can also play a role in disturbing the external fluid, making the fluid form a more complex flow state outside the tube and promoting heat exchange.

[0025] The fifth raised rib 8, the sixth raised rib 9, the seventh raised rib 10 and the eighth raised rib 11 are fixedly connected between the first inner tube 6 and the second inner tube 12. A second cavity 13 is arranged between the first inner tube 6 and the second inner tube 12. On the surface of the outer tube 1, a number of hemispherical protrusions 14 are evenly distributed. The outer tube 1, the first inner tube 6 and the second inner tube 12 are all made of high-strength corrosion-resistant materials. For example, an alloy material of stainless steel and copper can be selected, which not only ensures the strength of the material, can withstand a certain pressure and mechanical stress, but also improves the corrosion resistance, prolongs the service life of the heat exchange tube, and reduces problems such as performance degradation and leakage caused by corrosion. At the same time, this material also helps to a certain extent in anti-scaling, reducing the rate and degree of scaling.

[0026] Working principle: When the heat exchange tube of the steam generator is required to be used, a first inner tube 6 is fixedly arranged inside the outer tube 1. A second inner tube 12 is arranged inside the first inner tube 6, and a cavity is formed between the tubes. The device adopts a three-layer structure design, which increases the heat exchange area and enables heat to be transferred more fully between the tubes. By setting rib strips, these axial convex rib strips can guide the fluid inside the tube to form axial turbulence, increasing the degree of fluid disturbance, thereby improving the heat transfer coefficient between the fluid and the tube wall and enhancing the heat exchange effect. Moreover, the existence of the rib strips can also, to a certain extent, disrupt the development of the fluid boundary layer and further promote heat transfer. A number of hemispherical protrusions 14 are evenly distributed on the outer wall of the outer tube 1. The hemispherical protrusions 14 increase the outer surface area of the outer tube 1 and the contact area with the external heat exchange medium, which is beneficial to improving the heat exchange efficiency. At the same time, the hemispherical protrusions 14 can also play a role in disturbing the external fluid, making the fluid form a more complex flow state outside the tube and promoting heat exchange. The outer tube 1, the first inner tube 6, and the second inner tube 12 are all made of high-strength corrosion-resistant materials. For example, an alloy material of stainless steel and copper can be selected, which not only ensures the strength of the material and can withstand a certain amount of pressure and mechanical stress, but also improves the corrosion resistance, extends the service life of the heat exchange tube, and reduces problems such as performance degradation and leakage caused by corrosion. At the same time, this material also helps to a certain extent in anti-scaling, reducing the rate and degree of scaling.

[0027] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, rather than a limitation on the protection scope of the present invention. Any simple modification or equivalent replacement made by those of ordinary skill in the art to the technical solution of the present invention does not depart from the essence and scope of the technical solution of the present invention.

Claims

1. A heat exchange tube of a steam generator, comprising an outer tube (1), characterized in that: Inside the said outer tube (1), a first raised rib (2) is fixedly arranged, a second raised rib (3) is fixedly arranged, a third raised rib (4) is fixedly arranged, and a fourth raised rib (5) is fixedly arranged. At the lower end of the first raised rib (2), a first inner tube (6) is fixedly installed. A first cavity (7) is provided between the outer tube (1) and the first inner tube (6). The first raised rib (2), the second raised rib (3), the third raised rib (4), and the fourth raised rib (5) are fixedly connected between the outer tube (1) and the first inner tube (6).

2. The heat exchange tube of a steam generator according to claim 1, wherein: At the lower end inside the first inner tube (6), a fifth raised rib (8) is fixedly installed, and at the upper end inside the first inner tube (6), a sixth raised rib (9) is fixedly installed.

3. A heat exchange tube of a steam generator according to claim 2, wherein: At the left end inside the first inner tube (6), a seventh raised rib (10) is fixedly installed, and at the right end inside the first inner tube (6), an eighth raised rib (11) is fixedly installed. Inside the first inner tube (6), a second inner tube (12) is fixedly installed.

4. A heat exchange tube of a steam generator according to claim 3, characterized in that: The fifth raised rib (8), the sixth raised rib (9), the seventh raised rib (10), and the eighth raised rib (11) are fixedly connected between the first inner tube (6) and the second inner tube (12).

5. A heat exchange tube of a steam generator according to claim 4, characterized in that: A second cavity (13) is provided between the first inner tube (6) and the second inner tube (12).

6. The heat exchange tube of a steam generator according to claim 5, wherein: On the surface of the outer tube (1), a number of hemispherical protrusions (14) are evenly distributed.

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