CN216745665U - Sintering type surface porous spiral twisted heat exchange flat tube - Google Patents
Sintering type surface porous spiral twisted heat exchange flat tube Download PDFInfo
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- CN216745665U CN216745665U CN202220442538.8U CN202220442538U CN216745665U CN 216745665 U CN216745665 U CN 216745665U CN 202220442538 U CN202220442538 U CN 202220442538U CN 216745665 U CN216745665 U CN 216745665U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
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Abstract
The utility model relates to the technical field of heat exchange, in particular to a sintered flat heat exchange tube with a porous spiral twisted surface. The base pipe comprises a first joint section, a first transition section, a spiral twisted heat exchange section, a second transition section and a second joint section which are sequentially connected, wherein the cross sections of the first joint section and the second joint section are circular, the cross section of the spiral twisted heat exchange section is a flat round-corner rectangle, the spiral twisted heat exchange section is in a spiral twisted structure, and a metal porous layer is attached to the outer surface of the spiral twisted heat exchange section; the utility model increases the heat transfer efficiency of the heat exchange tube, has good anti-pollution property, is not easy to coke, and improves the reliability of the heat exchange tube.
Description
Technical Field
The utility model relates to the technical field of heat exchange, in particular to a sintered flat heat exchange tube with a porous spiral twisted surface.
Background
With the development of modern science and technology and industrial production, energy conservation and consumption reduction become main control indexes of production departments of various industries; the petroleum, chemical and metallurgical industries have a great proportion in national economy, and how to reduce energy consumption and investment cost in the industries is a subject to be researched.
The shell-and-tube heat exchanger is always the main and practical heat exchange equipment in the industries, a high-flux heat exchange tube in the shell-and-tube heat exchanger is the most common heat exchange tube, and the wall surface of the high-flux heat exchange tube takes a large number of holes as a bubble core generator, so that the bubble generation rate during liquid boiling is greatly improved; on one hand, the generation, growth, separation and stirring of a large amount of bubbles and the siphonage effect of pumping liquid into the porous layer when bubbles are generated enable the liquid to be stirred, and the heat transfer is accelerated; on the other hand, the large number of holes increases the contact area of heat exchange, finally improves the boiling heat transfer coefficient of the heat exchange tube, and how to improve the heat transfer efficiency of the high-flux heat exchange tube so as to reduce the production cost is always a long-lasting research direction in the industry.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problems, and provides a sintered surface porous spiral twisted heat exchange flat tube with increased heat transfer efficiency.
The utility model solves the problems and adopts the technical scheme that:
the utility model provides a porous spiral of sintered type surface twists heat transfer flat tube, includes the parent tube, and the parent tube is including the first joint section, first changeover portion, spiral distortion heat transfer section, second changeover portion and the second joint section that connect gradually, and the cross section of first joint section and second joint section is circular, and the cross section of spiral distortion heat transfer section is the fillet rectangle of platykurtic, and spiral distortion heat transfer section is the spiral distortion structure, and it has the metal porous layer to adhere to on the surface of spiral distortion heat transfer section.
Compared with the prior art, the utility model adopting the technical scheme has the outstanding characteristics that:
when fluid flows in the spiral twisted heat exchange section, longitudinal rotation and secondary rotational flow are generated due to a twisted structure, the disturbance degree of the fluid is increased, a heat transfer boundary layer is thinned, the mixing of the fluid is enhanced, a higher temperature gradient is kept near a pipe wall, the Nossel number is increased, and the heat transfer coefficient is improved by matching with the metal porous layer; secondly, the speed and the direction of the fluid outside the spiral twisted heat exchange section are periodically changed under the action of centrifugal force, so that the longitudinal mixing of the fluid is enhanced; thirdly, the heat transfer coefficient in the pipe is 2-3 times larger than that of the common circular pipe when the Reynolds number is low, and the heat transfer coefficient is reduced along with the increase of the Reynolds number, and finally the heat transfer coefficient can also be improved by more than 50%; no flow dead zone exists inside and outside the spiral twisted heat exchange section, no pollution and blockage are generated, the circulation amount of fluid in the metal porous layer is 10-15 times of that of the light pipe, and a large amount of fluid circulates to clean the surface of the heat exchange pipe, so that the heat exchange pipe has stronger anti-pollution property than the light pipe and is not easy to coke; fifthly, induced vibration is overcome, and the reliability of the heat exchange tube is improved; sixthly, the critical heat load is high: the critical heat load of the metal porous layer is 1.5-2.0 times higher than that of the light pipe; and seventhly, the first joint section and the second joint section with circular cross sections are more convenient to replace.
Preferably, the further technical scheme of the utility model is as follows:
the first joint section and the second joint section have an outer diameter of 14-45mm and a wall thickness of 2-5 mm.
The cross section width of the spiral twisted heat exchange section is 18-56mm, the cross section height is 10-15mm, and the wall thickness is 2-5 mm.
The thickness of the metal porous layer is 0.1-0.3mm, and the porosity is 30% -70%.
The inner surface of the base pipe is a smooth surface.
The outer surfaces of the first joint section, the first transition section, the second transition section and the second joint section are smooth surfaces.
The spiral twisted heat exchange section is in a spiral twisted structure along the clockwise direction.
Drawings
Fig. 1 is a schematic perspective view of a sintered surface porous spiral twisted heat exchange flat tube according to an embodiment of the present invention;
fig. 2 is a schematic cross-sectional structure view of a spiral twisted heat exchange segment of a sintered surface porous spiral twisted heat exchange flat tube according to an embodiment of the present invention;
fig. 3 is a schematic longitudinal sectional structure view of a sintered surface porous spiral twisted heat exchange flat tube according to an embodiment of the present invention;
labeled as: the heat exchanger comprises a first joint section 1, a first transition section 2, a spiral twisted heat exchange section 3, a second transition section 4, a second joint section 5 and a metal porous layer 6.
Detailed Description
The utility model will be further illustrated by the following examples, which are intended only for a better understanding of the present invention and therefore do not limit the scope of the utility model.
Referring to fig. 1-3, a sintered type surface porous spiral twisted heat exchange flat tube comprises a base tube, wherein the base tube comprises a first joint section 1, a first transition section 2, a spiral twisted heat exchange section 3, a second transition section 4 and a second joint section 5 which are sequentially connected, the first transition section 2 and the second transition section 4 are reducer tubes, the cross sections of the first joint section 1 and the second joint section 5 are circular, the cross section of the spiral twisted heat exchange section 3 is a flat round-corner rectangle, the edge of the spiral twisted heat exchange section 3 is in a spiral twisted structure, and a metal porous layer 6 is attached to the outer surface of the spiral twisted heat exchange section 3; the metal porous layer 6 is a sprayed high-flux metal coating; the first joint section 1 and the second joint section 5 have an outer diameter of 14-45mm and a wall thickness of 2-5 mm; the cross section width of the spiral twisted heat exchange section 3 is 18-56mm, the cross section height is 10-15mm, and the wall thickness is 2-5 mm; the thickness of the metal porous layer 6 is 0.1-0.3mm, and the porosity is 30% -70%; the inner surface of the base pipe is a smooth surface; the outer surfaces of the first joint section, the first transition section, the second transition section and the second joint section are smooth surfaces; the spiral twisted heat exchange section is in a spiral twisted structure along the clockwise direction.
The utility model has the advantages that: when fluid flows in the spiral twisted heat exchange section, longitudinal rotation and secondary rotational flow are generated due to a twisted structure, the disturbance degree of the fluid is increased, a heat transfer boundary layer is thinned, the mixing of the fluid is enhanced, a higher temperature gradient is kept near a pipe wall, the Nossel number is increased, and the heat transfer coefficient is improved by matching with the metal porous layer; secondly, the speed and the direction of the fluid outside the spiral twisted heat exchange section are periodically changed under the action of centrifugal force, so that the longitudinal mixing of the fluid is enhanced; thirdly, the heat transfer coefficient in the pipe is 2-3 times larger than that of the common circular pipe when the Reynolds number is low, and the heat transfer coefficient is reduced along with the increase of the Reynolds number, and finally the heat transfer coefficient can also be improved by more than 50%; no flow dead zone exists inside and outside the spiral twisted heat exchange section, no pollution and blockage are generated, the circulation amount of fluid in the metal porous layer is 10-15 times of that of the light pipe, and a large amount of fluid circulates to clean the surface of the heat exchange pipe, so that the heat exchange pipe has stronger anti-pollution property than the light pipe and is not easy to coke; fifthly, induced vibration is overcome, and the reliability of the heat exchange tube is improved; sixthly, the critical heat load is high: the critical heat load of the metal porous layer is 1.5-2.0 times higher than that of the light pipe; and seventhly, the first joint section and the second joint section with circular cross sections are more convenient to replace.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, which is defined in the appended claims.
Claims (7)
1. The utility model provides a porous spiral distortion heat transfer flat pipe in sintered type surface, includes the parent tube, its characterized in that: the base pipe comprises a first joint section, a first transition section, a spiral distortion heat exchange section, a second transition section and a second joint section which are sequentially connected, the cross sections of the first joint section and the second joint section are circular, the cross section of the spiral distortion heat exchange section is a flat round-corner rectangle, the spiral distortion heat exchange section is of a spiral distortion structure, and a metal porous layer is attached to the outer surface of the spiral distortion heat exchange section.
2. The sintered type surface porous spiral twisted heat exchange flat tube according to claim 1, wherein: the first joint section and the second joint section have an outer diameter of 14-45mm and a wall thickness of 2-5 mm.
3. The sintered type surface porous spiral twisted heat exchange flat tube according to claim 1, wherein: the cross section width of the spiral twisted heat exchange section is 18-56mm, the cross section height is 18-56mm, and the wall thickness is 2-5 mm.
4. The sintered type surface porous spiral twisted heat exchange flat tube according to claim 1, wherein: the thickness of the metal porous layer is 0.1-0.3mm, and the porosity is 30% -70%.
5. The sintered type surface porous spiral twisted heat exchange flat tube according to claim 1, wherein: the inner surface of the base pipe is a smooth surface.
6. The sintered type surface porous spiral twisted heat exchange flat tube according to claim 1, wherein: the outer surfaces of the first joint section, the first transition section, the second transition section and the second joint section are smooth surfaces.
7. The sintered type surface porous spiral twisted heat exchange flat tube according to claim 1, wherein: the spiral twisted heat exchange section is in a spiral twisted structure along the clockwise direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220442538.8U CN216745665U (en) | 2022-03-03 | 2022-03-03 | Sintering type surface porous spiral twisted heat exchange flat tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220442538.8U CN216745665U (en) | 2022-03-03 | 2022-03-03 | Sintering type surface porous spiral twisted heat exchange flat tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216745665U true CN216745665U (en) | 2022-06-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220442538.8U Active CN216745665U (en) | 2022-03-03 | 2022-03-03 | Sintering type surface porous spiral twisted heat exchange flat tube |
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| Country | Link |
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| CN (1) | CN216745665U (en) |
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2022
- 2022-03-03 CN CN202220442538.8U patent/CN216745665U/en active Active
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