CN210638561U - Flat twisted winding heat exchange tube - Google Patents
Flat twisted winding heat exchange tube Download PDFInfo
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- CN210638561U CN210638561U CN201920832716.6U CN201920832716U CN210638561U CN 210638561 U CN210638561 U CN 210638561U CN 201920832716 U CN201920832716 U CN 201920832716U CN 210638561 U CN210638561 U CN 210638561U
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Abstract
The utility model discloses a novel flat twisted and wound heat exchange tube, which is formed by twisting a flat straight tube and then spirally winding the twisted straight tube along a winding axis; the pipe body is provided with a hollow inner cavity, and the outer wall of the pipe body is provided with threads with a certain helical angle; the pipe body comprises an inlet section, an inlet transition section, a spiral winding section, an outlet transition section and an outlet section which are connected in sequence; the inlet section and the outlet section are arranged in a straight section, and the spirally wound section part is formed by spirally winding the pipe body into a circular or approximately circular section. The utility model relates to a novel flat distortion winding heat exchange tube can improve its working medium in intraductal, the outer flow heat transfer performance, has advantages such as torrent degree height, heat transfer coefficient height, difficult scale deposit, has better development prospect and extensive practical application and worth.
Description
Technical Field
The utility model relates to a reinforce heat transfer technical field, concretely relates to novel flat distortion winding heat exchange tube.
Background
The heat exchanger has wide application in various industries of national economy, is one of the most common devices in energy, petroleum, chemical engineering, metallurgy, power, light industry, food and even aerospace industries, and is an important device for developing secondary energy and realizing heat recovery and energy conservation and dissipation; at present, a shell-and-tube heat exchanger is widely applied due to large flow, small pressure drop loss and high operation pressure; the heat exchange tubes of the shell-and-tube heat exchanger in engineering application all use light tubes, and the turbulent flow effect of working fluid in the light tubes is poor, so that the defects of unobvious heat exchange effect and low heat exchange efficiency are caused; the shell-and-tube heat exchanger generally has a long operation period, impurities and other dirt in fluid are deposited and are easy to block, the efficiency of equipment is influenced, and particularly, the heat exchange pipeline of a large shell-and-tube heat exchanger is blocked, so that the heat exchange effect is influenced, and the operation of the whole process flow is influenced; the spiral wound tube type heat exchanger has the characteristics of large heat transfer area per unit volume, small occupied area, high heat transfer coefficient, small heat transfer temperature difference, high heat transfer efficiency, high pressure resistance, self-compensation of thermal expansion, difficulty in scaling, easiness in realizing large-scale and the like, and also has the function of realizing simultaneous heat transfer of multiple media. The spiral wound tube type heat exchanger is mainly applied to the industries of air separation, liquefied natural gas and the like. In recent years, with the development of large-scale petrochemical, coal chemical and liquefied natural gas devices, spiral wound tube heat exchangers have been used in large quantities due to their advantages of high heat transfer efficiency, compact structure and the like. For example, a hydrogenation reactor of a large oil refining device, a high-pressure material heat exchanger at the rear part of a reforming reactor of a PX device, a methanol washing heat exchanger in a coal-to-methanol device, and a reactor rear heat exchanger in a coal-to-ethylene glycol device all adopt spiral-wound tubular heat exchangers to replace a traditional baffle plate type heat exchanger, a thread locking ring type heat exchanger and a plate shell type heat exchanger, so that the operation of high pressure resistance and zero leakage is realized. The spiral wound tube type heat exchanger has wide market prospect in the industries of petrochemical industry, coal chemical industry and the like. In the common spiral winding pipe, due to the action of centripetal force, secondary flow moving towards the inner side of the winding pipe is generated in the winding pipe, and along with the gradual stabilization of the flow form, the temperature distribution that the temperature of the fluid working medium at the inner side of the winding pipe is low and the temperature of the fluid working medium at the outer side of the winding pipe is high is formed.
SUMMERY OF THE UTILITY MODEL
To the above the problem, the utility model provides a novel flat distortion winding heat exchange tube, the torrent degree is high, heat transfer coefficient is high, difficult scale deposit when intraductal working medium flows the heat transfer in the pipe.
The technical scheme of the utility model is that the flat twisted winding heat exchange tube comprises a heat exchange tube body, wherein the tube body is provided with a hollow inner cavity, and the outer wall of the tube body is provided with a thread with a certain helical angle; the pipe body comprises an inlet section, an inlet transition section, a spiral winding section, an outlet transition section and an outlet section which are connected in sequence; the inlet section and the outlet section are arranged in a straight section, and the spirally wound section part is formed by spirally winding the pipe body into a circular or approximately circular section.
The flat twisted and wound heat exchange tube is formed by twisting a flat straight tube and then spirally winding the twisted flat straight tube along a winding axis.
Wherein, the thread of the inlet section has the same helix angle.
Alternatively, it is preferred that the thread of the outlet section has the same helix angle.
Wherein, preferably, the thread direction of the outer wall of the pipe body is opposite to the winding rotation direction of the pipe body in the spiral winding section part.
Namely, if the spiral winding direction of the thread on the outer wall of the pipe body is clockwise, the twisting rotation direction of the section of the pipe body in the spiral winding section part is anticlockwise; if the spiral winding direction of the thread on the outer wall of the pipe body is anticlockwise, the twisting and rotating direction of the section of the pipe body in the spiral winding section part is clockwise.
Wherein preferably the pitch of the outer walls of the tubes is equal.
Wherein it is preferable that the sectional shape of the tube body of the flat twisted heat exchange tube is a round rectangular shape. The cross section of the pipe body for winding the heat exchange pipe is flat and is round-head rectangular similar to a track shape.
The novel flat twisted heat exchange tube is helically twisted about a winding axis.
Has the advantages that:
the utility model relates to a novel flat distortion winding heat exchange tube, the pipe wall outside, the inboard of this novel flat distortion winding heat exchange tube are all smooth.
The utility model relates to a novel flat distortion winding heat exchange tube, this novel flat distortion winding heat exchange tube spiral winding warp's winding angle (the helical angle of outer wall promptly), winding diameter, distortion rotation angle etc. are calculated by operating condition heat load and are confirmed. The working medium in the tube has high turbulence degree and high heat exchange coefficient when flowing in the tube for heat exchange, and is not easy to scale.
Drawings
FIG. 1 is a schematic structural view of a novel flat twisted and wound heat exchange tube;
fig. 2 is a cross-sectional view of a spirally wound section of a flat, twist wound heat exchange tube.
FIG. 3 is a structural schematic diagram of a cross section of the novel flat twisted heat exchange tube;
in the figure: 1-inlet section, 2-inlet transition section, 3-spiral winding section, 4-outlet transition section, 5-outlet section, 21-outer surface arc section, 22-section straight section, 23-pipe wall and 24-inner surface arc section.
Detailed Description
The following describes in further detail embodiments of the present invention with reference to the accompanying drawings.
As shown in fig. 1, a flat twisted heat exchange tube comprises a heat exchange tube body having a hollow inner cavity, the outer wall of the tube body having a screw thread with a certain helical angle; the pipe body comprises an inlet section 1, an inlet transition section 2, a spiral winding section 3, an outlet transition section 4 and an outlet section 5 which are connected in sequence; the inlet section and the outlet section are arranged in straight sections, and the spirally wound section is partially formed by spirally winding the pipe body into a circular or nearly circular cross section (see fig. 2).
The flat twisted and wound heat exchange tube has a flat round-head rectangular cross-sectional shape before being twisted. As shown in fig. 3, the pipe comprises an outer surface circular arc section 21, a cross-sectional straight section 22, a pipe wall 23 and an inner surface circular arc section 24. The flat twisted and wound heat exchange tube is formed by twisting a flat straight tube and then spirally winding the twisted flat straight tube along a winding axis.
The utility model discloses an embodiment as follows: fluid working medium enters the novel flat twisted winding heat exchange tube from the inlet section 1, passes through the inlet transition section 2 and then flows into the spiral winding section 3; the turbulence degree of the fluid in the pipeline is strengthened under the action of the twisted pipe wall and the spiral section; finally, the fluid working medium flows out of the novel flat twisted heat exchange tube from the outlet transition section 4 and the outlet section 5.
The novel flat twisted and wound heat exchange tube can achieve the effect of strengthening heat transfer in the tube; wherein, two enhanced heat exchange technologies exist in the tube; the first strengthening technique is: due to the special structure of the spiral winding section 3, the centripetal force of fluid on the fluid action on the inner side of the pipe wall of the spiral winding pipe, which is formed by the fluid flowing in the spiral winding pipe, generates secondary flow perpendicular to the inner side of the pipe wall, so that the flowing state of the fluid on the inner side of the winding pipe is strengthened, and the turbulence effect is increased; referring to fig. 3, the second enhanced heat exchange technique is: due to the periodic rotary transformation of the twisted flat pipe wall 23, the positions of fluid working media in the pipe are continuously and alternately changed, the fluid working media flow along the pipe wall and are subjected to acting force which is perpendicular to the inner side of the pipe wall and the direction of the acting force is always changed, the generated secondary flow can effectively break a boundary layer, the turbulent effect of the flow in the pipe is enhanced, and the flow heat transfer effect is enhanced.
In the novel flat twisted winding heat exchange tube, a plurality of enhanced heat exchange technologies are superposed, so that a boundary layer and dirt on a fluid wall surface can be effectively damaged, and the heat exchange coefficient is improved; the novel flat twisted heat exchange tube has the advantages of high heat transfer efficiency, compact structure, strong bearing capacity and the like, and has better development prospect and wide practical application value.
Claims (4)
1. The utility model provides a flat distortion winding heat exchange tube, includes the heat exchange tube body, its characterized in that: the pipe body is provided with a hollow inner cavity, and the outer wall of the pipe body is provided with threads with a certain helical angle; the pipe body comprises an inlet section, an inlet transition section, a spiral winding section, an outlet transition section and an outlet section which are connected in sequence; the inlet section and the outlet section are arranged in a straight section, and the spiral winding section part is formed by spirally winding the pipe body into a circular or nearly circular section;
the cross section of the tube body of the flat twisted and wound heat exchange tube is in a round-head rectangle, and the round-head rectangle comprises an outer surface arc section, a straight section of the cross section, a tube wall and an inner surface arc section; the thread direction of the outer wall of the pipe body is opposite to the winding rotation direction of the pipe body in the spiral winding section part.
2. The flat, twisted, and wound heat exchange tube of claim 1, wherein: the inlet section threads are of the same helix angle.
3. The flat, twisted, and wound heat exchange tube of claim 1, wherein: the spiral angles of the threads of the outlet section are the same.
4. The flat, twisted, and wound heat exchange tube of claim 1, wherein: the screw pitches of the outer walls of the pipe bodies are equal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920832716.6U CN210638561U (en) | 2019-06-04 | 2019-06-04 | Flat twisted winding heat exchange tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920832716.6U CN210638561U (en) | 2019-06-04 | 2019-06-04 | Flat twisted winding heat exchange tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210638561U true CN210638561U (en) | 2020-05-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920832716.6U Active CN210638561U (en) | 2019-06-04 | 2019-06-04 | Flat twisted winding heat exchange tube |
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| Country | Link |
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| CN (1) | CN210638561U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117109335A (en) * | 2023-10-20 | 2023-11-24 | 连云港晟源科技有限公司 | Raw coke oven gas waste heat utilization equipment |
-
2019
- 2019-06-04 CN CN201920832716.6U patent/CN210638561U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117109335A (en) * | 2023-10-20 | 2023-11-24 | 连云港晟源科技有限公司 | Raw coke oven gas waste heat utilization equipment |
| CN117109335B (en) * | 2023-10-20 | 2024-01-02 | 连云港晟源科技有限公司 | Raw coke oven gas waste heat utilization equipment |
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