Jacketed pipe supporting turbulent flow structure and heat exchange equipment

Abstract

The utility model discloses a jacketed pipe supporting turbulent flow structure and heat exchange equipment, and belongs to the field of chemical equipment manufacturing, the jacketed pipe supporting turbulent flow structure comprises an inner pipe, a plurality of annular belts are fastened on the outer wall of the inner pipe in the axial direction of the inner pipe, and supporting turbulent flow assemblies are arranged on the outer walls of the annular belts; the heat exchanger further comprises an outer pipe, the outer pipe is arranged on the inner pipe in a sleeving mode, and the annular belt provided with the supporting turbulent flow assembly is located between the outer pipe and the inner pipe. By means of the structure, the inner pipe cannot be welded or damaged, a good turbulent flow effect is achieved, and the heat exchange effect can be improved.

Description

Technical Field

[0001] The utility model relates to the field of chemical equipment manufacturing, and particularly relates to a support and flow disturbance structure for a jacketed pipe and a heat exchange device. Background Art

[0002] At present, jacketed pipe heaters / coolers are used for heating or cooling the medium in the inner pipe, and are widely used in fields such as petrochemical, coal chemical, and fine chemical industries. For example, the tail gas jacketed pipe in a polysilicon reduction skid is used to cool the tail gas from 600°C to 200°C.

[0003] The existing support methods, such as Figure 6 shown, because welding needs to be carried out on the inner pipe, only non-destructive testing of the surface can be carried out by means of penetrant testing, and it is impossible to confirm whether the welding causes damage to the inner pipe. When flammable, explosive, extremely highly hazardous media are introduced into the inner pipe, there are potential risks. At the same time, the existing support methods only have a supporting effect and basically have no flow disturbance effect on the fluid, resulting in low heat exchange efficiency.

[0004] In view of the above problems, the utility model designs and manufactures a support and flow disturbance structure for a jacketed pipe and a heat exchange device to overcome the above defects. Content of the Utility Model

[0005] Regarding the problems existing in the prior art, a support and flow disturbance structure for a jacketed pipe and a heat exchange device provided by the utility model do not require welding of the inner pipe, will not cause damage to the inner pipe, and have a good flow disturbance effect, which can improve the heat exchange effect.

[0006] In order to achieve the above object, the technical scheme adopted by the utility model is as follows: A support and flow disturbance structure for a jacketed pipe includes an inner pipe, and a plurality of rings are fastened along the axial direction of the inner pipe on the outer wall of the inner pipe, and support and flow disturbance components are arranged on the outer wall of the ring;

[0007] It further includes an outer pipe, the outer pipe is sleeved on the inner pipe, and the ring provided with the support and flow disturbance components is located between the outer pipe and the inner pipe.

[0008] Preferably, the support and flow disturbance components are welded on the outer wall of the ring;

[0009] And / or, there is a gap between the end of the support and flow disturbance component and the outer pipe, and the gap is 1-3 mm.

[0010] Preferably, the support and flow disturbance components are provided as a plurality of flow disturbance columns or a plurality of flow disturbance sheets, and the flow disturbance sheets are provided as spiral blades;

[0011] A plurality of the flow disturbance columns or spiral blades are circumferentially distributed on the outer wall of the ring.

[0012] Preferably, the flow disturbance columns are provided as cylinders or frustum of a cone or frustum of a pyramid.

[0013] Preferably, locking mechanisms are provided at both ends of the annular belt, and the annular belt can be fastened to the outer wall of the inner pipe through the locking mechanisms.

[0014] Preferably, the locking mechanism includes two bosses, which are fixedly connected to both ends of the annular belt, extend outward from the annular belt, and are provided with connection holes. The two bosses are connected by bolts and nuts.

[0015] Preferably, after the two bosses are fastened by bolts and nuts, they are reinforced by welding, or the bolts and nuts after fastening are welded and reinforced.

[0016] Preferably, the surface of the inner pipe corresponding to the position of the annular belt is roughened.

[0017] Preferably, at the operating temperature, there is no potential difference between the material of the annular belt and the material of the inner pipe, and the potential of the material of the support and turbulence generating assembly is not greater than the potential of the material of the annular belt.

[0018] A heat exchange device includes the above-mentioned jacket pipe support and turbulence generating structure.

[0019] The advantages of this utility model are as follows:

[0020] 1. Since the support and turbulence generating assembly is sleeved and fastened on the inner pipe after being arranged on the annular belt, damage to the inner pipe is avoided. Especially when the support and turbulence generating assembly is fixed by welding, the welding influence on the inner pipe is avoided, and the non-destructive testing process of the inner pipe is eliminated.

[0021] 2. In this utility model, the support member that was originally fixed on the inner pipe and only played a supporting role is designed as a support and turbulence generating assembly that integrates support and turbulence generation, so that the fluid changes from laminar flow to turbulent flow, effectively improving the turbulence degree of the fluid in the jacket pipe, and thus improving the heat transfer efficiency. Description of the Drawings

[0022] Figure 1 It is a cross-sectional view of the support and turbulence generating assembly of this utility model being a cylinder;

[0023] Figure 2 It is a cross-sectional view of the support and turbulence generating assembly of this utility model being a frustum of a cone or a frustum of a pyramid;

[0024] Figure 3 It is a cross-sectional view of the support and turbulence generating assembly of this utility model being a spiral blade;

[0025] Figure 4 It is a structural schematic diagram of a jacket pipe support and turbulence generating structure;

[0026] Figure 5 It is a schematic diagram of the support and turbulence generating assembly of this utility model being arranged on the annular belt;

[0027] Figure 6 It is a cross-sectional view of an existing jacketed pipe.

[0028] In the figure: 1 - outer pipe, 2 - inner pipe, 3 - annular band, 4 - locking mechanism, 5 - support and flow disturbance assembly. Specific implementation manner

[0029] For the convenience of those skilled in the art to understand, the following further describes the present utility model with reference to the accompanying drawings.

[0030] As Figures 1 to 5 shown, a support and flow disturbance structure of a jacketed pipe includes an inner pipe 2. A plurality of annular bands 3 are fastened along the axial direction of the inner pipe 2 on the outer wall of the inner pipe 2. A support and flow disturbance assembly 5 is provided on the outer wall of the annular band 3. The support and flow disturbance assembly 5 is preferably welded on the outer wall of the annular band 3. It also includes an outer pipe 1. The outer pipe 1 is sleeved on the inner pipe 2. The annular band 3 provided with the support and flow disturbance assembly 5 is located between the outer pipe 1 and the inner pipe 2.

[0031] On the one hand, after the support and flow disturbance assembly 5 is arranged on the annular band 3 and then sleeved and fastened on the inner pipe 2, damage to the inner pipe 2 is avoided. Especially when the support and flow disturbance assembly 5 is fixed by welding, the welding influence on the inner pipe 2 is avoided, and the non-destructive testing process for the inner pipe 2 is eliminated. On the other hand, the support member that was originally fixed on the inner pipe 2 and only played a supporting role is designed as a support and flow disturbance assembly 5 that integrates support and flow disturbance, so that the fluid changes from laminar flow to turbulent flow, effectively improving the turbulence degree of the fluid in the jacketed pipe, and further improving the heat transfer efficiency.

[0032] Specifically, the support and flow disturbance assembly 5 is set as a plurality of flow disturbance columns or a plurality of flow disturbance sheets. The flow disturbance sheets are preferably set as spiral blades. The plane angle of the spiral blades preferably forms an angle of 30 - 60 degrees with the axial direction of the annular band 3. The flow disturbance columns are preferably set as cylinders or frustum cones or prisms; the plurality of flow disturbance columns or spiral blades are preferably circumferentially evenly distributed on the outer wall of the annular band 3.

[0033] During use, according to the design, determine the structural form and size of the support and flow disturbance assembly 5, and chamfer it after cutting to avoid damaging the outer pipe 1. There is a gap between the end of the support and flow disturbance assembly 5 and the outer pipe 1. The gap is preferably 1 - 3 mm, ensuring convenient assembly and later support requirements.

[0034] The thickness and width of the annular band 3 are designed according to the size of the inner pipe 2. For example, if the inner pipe 2 is Φ219 mm, the width of the annular band 3 can be designed to be 100 - 150 mm, and the thickness is designed to be 3 - 6 mm. It is necessary to fully consider the structural strength of the annular band 3 to avoid failure during the assembly process.

[0035] Taking the dimensions of the support spoiler assembly 5 with the inner pipe 2 of Φ219×8mm and the outer pipe 1 of Φ273×8mm as an example, the net distance between the inner pipe 2 and the outer pipe 1 is 19mm. Subtracting the thickness of the annulus 3 of 3 - 6mm, the height of the support spoiler assembly 5 is then 12 - 14mm.

[0036] To ensure that the annulus 3 can be fastened to the outer wall of the inner pipe 2, locking mechanisms 4 are provided at both ends of the annulus 3. Through the locking mechanisms 4, the annulus 3 can be fastened to the outer wall of the inner pipe 2. The locking mechanism 4 of the present utility model specifically includes two bosses. The bosses are fixedly connected to both ends of the annulus 3 and extend outward from the annulus 3. Connecting holes are provided on the bosses, and the two bosses are connected by bolts and nuts.

[0037] Preferably, the bosses of the present utility model are welded to both ends of the annulus 3. Generally, argon arc welding is used. After welding, it is polished flat, and the weld seam is nondestructively detected by means of penetrant testing. The annulus 3 with bosses is sleeved on the surface of the inner pipe 2. According to the design dimensions, the interval distance of each annulus 3 is determined, and the bosses are fastened with bolts and nuts to ensure that the annulus 3 completely fits on the surface of the inner pipe 2.

[0038] To prevent the annulus 3 from loosening, it is preferably welded and reinforced between the two bosses fastened by bolts and nuts. After welding, the bolts and nuts are removed, and the welded part is polished flat, or, the bolts and nuts after fastening are directly welded and reinforced.

[0039] After the support spoiler assembly 5 is installed, the inner pipe 2 can be assembled with the outer pipe 1 by threading.

[0040] The surface of the inner pipe 2 corresponding to the position of the annulus 3 of the present utility model is preferably roughened. Specifically, operations such as sandblasting can be carried out to increase the roughness, thereby improving the friction between the inner pipe 2 and the annulus 3.

[0041] Since when the fluid is transported in the jacketed pipe, a potential difference will be formed due to the materials between the annulus 3, the inner pipe 2 and the outer pipe 1, resulting in corrosion. In order to avoid the corrosion caused by the potential difference, and at the same time fully considering the influence of the fluid temperature. The material of the annulus 3 of the present utility model should be of the same category as the material of the inner pipe 2. The material of the annulus 3 and the material of the inner pipe 2 do not generate a potential difference, while the potential of the material of the support spoiler assembly 5 is not greater than the potential of the material of the annulus 3. Specifically, for example, if the inner pipe 2 is made of S31603 material, the outer pipe 1 is made of 20# material, the material of the annulus 3 can be selected as S31603, and a more economical choice is S30408, and the support flow resistance member can be selected as Q235B.

[0042] The present utility model also provides a heat exchange device, including the above-mentioned jacketed pipe support spoiler structure.

[0043] The present utility model specifically introduces a jacketed pipe support spoiler structure and its working heat exchange result:

[0044] Design a jacketed pipe with an inner pipe 2 of Φ219*8mm and an outer pipe 1 of Φ273*8mm. The support and turbulence components 5 are several cylinders, and 3 are evenly distributed along the circumference. The total length of the jacketed pipe is 21m. An annulus 3 is arranged every 1m, and a total of 20 sets of annulus 3 and support and turbulence components 5 are set. The thickness of the annulus 3 is 6mm, and the gap between the end of the support and turbulence component 5 and the outer pipe 1 is 3mm.

[0045] The medium in the inner pipe 2 is a mixture of H2 and TCS, with a flow rate of 7000kg / h and a pressure of 0.6MPa. It needs to be cooled from 600°C to 40°C. The medium in the outer pipe 1 is heat transfer oil, with a pressure of 0.4MPa, and it is heated from 100°C to 140°C. The overall heat transfer coefficient is 201W / ㎡·°C. After adopting the support and turbulence components 5 of this scheme, the overall heat transfer coefficient has increased to 210W / ㎡·°C, and the heat transfer coefficient has increased by 4.47%.

[0046] It should be understood that the use of these embodiments is only for explaining the present invention and is not intended to limit the protection scope of the present invention. In addition, it should also be understood that after reading the technical content of the present invention, those skilled in the art can make various changes, modifications and / or variations to the present invention, and all these equivalent forms also fall within the protection scope defined by the appended claims of this application.

Claims

1. A support and spoiler structure for a jacketed pipe, characterized in that It includes an inner tube (2), and several annular bands (3) are fixedly attached to the outer wall of the inner tube (2) along the axial direction of the inner tube (2). A support and flow disturbance assembly (5) is provided on the outer wall of the annular band (3). It further includes an outer tube (1). The outer tube (1) is sleeved on the inner tube (2), and the annular band (3) provided with the support and flow disturbance assembly (5) is located between the outer tube (1) and the inner tube (2).

2. The split sleeve support and flow disturbance structure according to claim 1, wherein The support and flow disturbance assembly (5) is welded to the outer wall of the annular band (3). And / or, there is a gap between the end of the support and flow disturbance assembly (5) and the outer tube (1), and the gap is 1 - 3 mm.

3. The split sleeve support and flow disturbing structure according to claim 1, wherein The support and flow disturbance assembly (5) is provided as several flow disturbance columns or several flow disturbance sheets, and the flow disturbance sheets are provided as spiral blades. Several of the flow disturbance columns or spiral blades are circumferentially distributed on the outer wall of the annular band (3).

4. A jacketed pipe support and flow disturbance structure according to claim 3, characterized in that, The flow disturbance column is provided as a cylinder or a frustum or a prismoid.

5. The split sleeve support spoiler structure according to claim 1, characterized in that Both ends of the annular band (3) are provided with a locking mechanism (4), and the annular band (3) can be fastened to the outer wall of the inner tube (2) through the locking mechanism (4).

6. The split sleeve support and flow disturbing structure according to claim 5, characterized in that, The locking mechanism (4) includes two convex platforms. The convex platforms are fixedly connected to both ends of the annular band (3). The convex platforms extend outward from the annular band (3). Connection holes are provided on the convex platforms, and the two convex platforms are connected by bolts and nuts.

7. A jacketed pipe support and flow disturbance structure according to claim 6, wherein After being fastened by bolts and nuts, the two convex platforms are reinforced by welding, or the bolts and nuts after fastening are welded and reinforced.

8. A jacketed pipe support and spoiler structure according to claim 1, characterized in that, The surface of the inner tube (2) corresponding to the position of the annular band (3) is processed by roughening.

9. The split sleeve support spoiler structure according to claim 1, characterized in that, At the operating temperature, there is no potential difference between the material of the annular band (3) and the material of the inner tube (2), and the potential of the material of the support and flow disturbance assembly (5) is not greater than the potential of the material of the annular band (3).

10. A heat exchange device, characterized in that, It includes the jacketed tube support and flow disturbance structure according to any one of claims 1 to 9.

Images