A multi-stream coiled tube heat exchanger and a method of using the same

Abstract

The present invention discloses a multi-stream wrap-around tube heat exchanger and a method for using the same, comprising an outer shell and a shell head, wherein a fluid pipeline is arranged in the outer shell, and an anti-vibration component is arranged at the lead-out end of the fluid pipeline; the inlet end and the outlet end of the fluid pipeline are symmetrically arranged on the double tube sheet assembly; a partition plate is arranged in both the fluid inlet cavity and the fluid outlet cavity, and the partition plate is used to separate the inlet end and the outlet end of the fluid pipeline. The present invention is provided with an anti-vibration component, and multiple layers of fluid pipelines are separated and fixed by an annular saddle-shaped tube bracket and an annular metal belt, so as to effectively prevent the problem of fluid pipeline vibration damage caused by severe vibration conditions; on the basis of the double tube sheet assembly, the inlet end and the outlet end of each layer of fluid pipeline are separated in combination with the middle partition plate and the partition plate, so as to avoid direct contact between heat exchange media in different tube passes, reduce the risk of cross contamination, and significantly improve the safety and reliability of the multi-stream wrap-around tube heat exchanger.

Description

Technical Field

[0001] The present invention belongs to the technical field of heat exchangers, and in particular relates to a multi-stream bypass heat exchanger and a use method thereof. Background Art

[0002] The coiled heat exchanger is a heat exchange equipment widely used in industrial production. The application prospects of the coiled heat exchanger are very broad. First of all, as the country attaches great importance to environmental protection and energy conservation, the coiled heat exchanger, as an efficient and energy-saving heat exchange equipment, is increasingly recognized and favored by the market, especially in industrial fields such as petroleum, chemical, and metallurgy. Its application has become one of the main means to promote energy structure adjustment and promote green transformation and upgrading. Secondly, the coiled heat exchanger can be used for heat exchange between a variety of media, such as steam-water, water-oil, air-water, air-gas, etc., and has broad application prospects in different industrial fields. In addition, the coiled heat exchanger has a long service life, a simple structure, easy maintenance, and a lower cost of use than other heat exchange equipment, so it is also more advantageous in the market.

[0003] The working principle of the coiled tube heat exchanger is mainly based on the heat transfer between the fluid inside the pipe and the fluid outside the pipe. Specifically, it directly exchanges heat between the internal fluid and the external fluid through the spiral pipe with a smaller inner diameter and the fixed pipe with a larger outer diameter. The internal fluid is generally liquid or gas, while the external fluid is cooling water or steam. When the internal fluid flows in the spiral pipe, the heat it carries will be conducted to the outer surface of the fixed pipe through the pipe wall, and then dissipated through absorption by the external fluid, thereby achieving heat exchange.

[0004] Multi-stream wrap-around heat exchangers are suitable for processing multiple working media at the same time, where a large amount of heat needs to be transferred under a small temperature difference and the operating pressure of the medium in the tube is high. In multi-stream wrap-around heat exchangers, since multiple working media are simultaneously introduced into the tube, cross-contamination of different media may occur. In addition, the increase in multi-stream pipelines causes vibration at the pipeline outlet, which in turn causes damage to the heat exchanger equipment. For this reason, we propose a multi-stream wrap-around heat exchanger and a method for using the same. Summary of the invention

[0005] The object of the present invention is to provide a multi-stream wound tube heat exchanger and a method of using the same to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a multi-stream tube-wound heat exchanger, comprising an outer shell and a shell head, wherein a plurality of fluid pipelines are arranged in the outer shell, and an anti-vibration assembly is arranged between the lead-out ends of the plurality of fluid pipelines;

[0007] The outer shell and the shell head are connected via a double tube sheet assembly, and the inlet ends and outlet ends of a plurality of the fluid pipelines are symmetrically arranged on the double tube sheet assembly;

[0008] A fluid inlet cavity and a fluid outlet cavity are formed in the shell head through an intermediate partition, and a plurality of partition plates are arranged in the fluid inlet cavity and the fluid outlet cavity, and the plurality of partition plates are used to separate the inlet end and the outlet end of the plurality of fluid pipelines.

[0009] Preferably, a central cylinder is arranged in the outer shell, and the plurality of fluid pipelines are arranged in a multi-layer structure, and each layer of the fluid pipeline is wound around the central cylinder in a U-shaped structure.

[0010] Preferably, a gasket is provided between the innermost fluid conduit and the central cylinder.

[0011] Preferably, the anti-vibration assembly comprises an annular metal belt and an annular saddle-shaped tube bracket;

[0012] There are several annular saddle-shaped tube supports, and the lead-out ends of the multiple layers of the fluid pipelines are separated and fixed by the several annular saddle-shaped tube supports. The annular metal belt is arranged on the outside of the outermost layer of the fluid pipeline.

[0013] Preferably, the annular saddle-shaped tube support is provided with saddle-shaped tube grooves distributed at equal intervals, and the fluid pipeline is arranged in the saddle-shaped tube grooves on the annular saddle-shaped tube support.

[0014] Preferably, the double tube sheet assembly comprises two tube sheets;

[0015] Each tube sheet includes a plurality of annular plates and a circular plate, and a convex plate structure is formed between the plurality of annular plates and the circular plate, which is stepped downward from the outside to the inside. The annular plates and the circular plates are fixedly connected by bolts, and the plurality of annular plates and the circular plate are respectively connected to each layer of fluid pipelines.

[0016] Preferably, the partition plate is a semi-annular structure, and each of the partition plates separates the inlet end and the outlet end of each layer of the fluid pipeline.

[0017] Preferably, a plurality of tube-side fluid inlet ends and tube-side fluid outlet ends are symmetrically arranged on the shell cover, and the symmetrical tube-side fluid inlet ends and tube-side fluid outlet ends are respectively connected to the inlet end and the outlet end of the fluid pipeline of each layer.

[0018] Preferably, a shell-side medium inlet is provided at the upper portion of the outer shell, and a shell-side medium outlet is provided at the bottom of the outer shell.

[0019] A method for using a multi-stream wound tube heat exchanger comprises the following steps:

[0020] A: Multiple tube-side heat exchange media enter the fluid inlet cavity formed by the corresponding middle partition and the sub-pass partition through several tube-side fluid inlet ends, and then enter the fluid pipeline through the corresponding fluid pipeline inlet end;

[0021] B: Shell-side medium enters the outer shell through the shell-side medium inlet, and the tube-side heat exchange medium in the fluid pipeline circulates in the fluid pipeline to complete heat exchange with the shell-side medium;

[0022] C: After heat exchange, the tube-side heat exchange medium flows out from the outlet end of the fluid pipeline to the fluid outlet cavity formed by the corresponding middle partition and the partition, and then is discharged from the corresponding tube-side fluid outlet end, and the shell-side medium is discharged through the shell-side medium outlet end.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The present invention is provided with an anti-vibration assembly, which separates and fixes the lead-out ends of the multi-layer fluid pipelines through an annular saddle-shaped pipe bracket, and wraps the outer side of the outermost layer of the fluid pipeline with an annular metal belt, thereby separating and fixing the multi-layer fluid pipelines, effectively preventing the problem of vibration damage to the fluid pipelines caused by severe vibration conditions, and ensuring the normal use of the heat exchanger;

[0025] 2. The present invention uses two tube sheets. Even if one tube sheet leaks, the fluid will not flow directly into the shell side or the tube side, thus avoiding damage to the heat exchanger equipment and interruption of production. This design ensures that the heat exchanger can maintain stable performance under harsh or abnormal working conditions;

[0026] 3. Based on the double tube sheet assembly, the present invention combines the middle partition and the pass partition to separate the inlet and outlet ends of each layer of fluid pipelines. By separating different fluid channels, direct contact between heat exchange media in different tube passes is avoided, the risk of cross contamination is reduced, and the safety and reliability of multi-stream bypass heat exchangers are significantly improved;

[0027] 4. In the present invention, each layer of fluid pipeline is wound around the central cylinder in a U-shaped structure, and each layer of fluid pipeline can be disassembled in layers, which can be realized and is easy to clean. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall cross-sectional structure of the present invention;

[0029] Figure 2 It is a schematic cross-sectional structure diagram of the shell head of the present invention;

[0030] Figure 3It is a structural schematic diagram of the fluid pipeline and the central cylinder of the present invention;

[0031] Figure 4 It is a schematic cross-sectional structural diagram of the fluid pipeline and the anti-vibration assembly of the present invention;

[0032] Figure 5 It is a schematic diagram of the structure of the fluid pipeline in the outer shell of the present invention.

[0033] In the figure: 1. outer shell; 2. shell head; 3. anti-vibration assembly; 301. annular metal belt; 302. annular saddle tube support; 303. saddle tube groove; 4. double tube sheet assembly; 401. tube sheet; 402. annular plate; 403. bolts; 5. middle partition; 6. partition plate; 7. center cylinder; 8. gasket; 9. tube side fluid inlet; 10. tube side fluid outlet; 11. shell side medium inlet; 12. shell side medium outlet; 13. fluid pipeline. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] See also Figure 1-Figure 5 The multi-stream wound tube heat exchanger provided by the present invention comprises an outer shell 1 and a shell head 2, wherein a plurality of fluid pipelines 13 are arranged in the outer shell 1, a central cylinder 7 is arranged in the outer shell 1, and the plurality of fluid pipelines 13 are arranged in a multi-layer structure, each layer of the fluid pipeline 13 is wound around the central cylinder 7 in a U-shaped structure, and a gasket 8 is arranged between the innermost layer of the fluid pipeline 13 and the central cylinder 7;

[0036] In the present invention, each layer of fluid pipeline 13 is wound around the central cylinder 7 in a U-shaped structure, and each layer of fluid pipeline 13 can be disassembled in layers, which can be realized by layered disassembly and is easy to clean;

[0037] An anti-vibration assembly 3 is arranged between the lead-out ends of several fluid pipelines 13, and the anti-vibration assembly 3 includes an annular metal belt 301 and an annular saddle-shaped pipe bracket 302; there are several annular saddle-shaped pipe brackets 302, and the lead-out ends of the multi-layer fluid pipelines 13 are separated and fixed by the several annular saddle-shaped pipe brackets 302, the annular metal belt 301 is arranged on the outer side of the outermost fluid pipeline 13, and the annular saddle-shaped pipe bracket 302 is provided with saddle-shaped pipe grooves 303 distributed at equal intervals, and the fluid pipeline 13 is arranged in the saddle-shaped pipe groove 303 on the annular saddle-shaped pipe bracket 302;

[0038] The present invention is provided with an anti-vibration assembly 3, which separates and fixes the lead-out ends of the multi-layer fluid pipeline 13 through an annular saddle-shaped pipe bracket 302, and wraps and sets the outer side of the outermost fluid pipeline 13 through an annular metal belt 301, thereby separating and fixing the multi-layer fluid pipeline 13, effectively preventing the problem of vibration damage of the fluid pipeline 13 caused by severe vibration conditions, and ensuring the normal use of the heat exchanger;

[0039] The outer shell 1 and the shell head 2 are connected by a double tube sheet assembly 4, and the inlet and outlet ends of the plurality of fluid pipelines 13 are symmetrically arranged on the double tube sheet assembly 4. The double tube sheet assembly 4 includes two tube sheets 401; each tube sheet 401 includes a plurality of annular plates 402 and a circular plate 404, and a convex plate structure that is stepped downward from the outside to the inside is formed between the plurality of annular plates 402 and the circular plate 404. The annular plates 402 and the circular plates 404 are fixedly connected by bolts 403, and the plurality of annular plates 402 and the circular plate 404 are respectively connected to each layer of the fluid pipeline 13;

[0040] The present invention uses two tube sheets 401. Even if one tube sheet 401 leaks, the fluid will not flow directly into the shell side or the tube side, thus avoiding damage to the heat exchanger equipment and interruption of production. This design ensures that the heat exchanger can maintain stable performance under harsh or abnormal working conditions.

[0041] A fluid inlet cavity and a fluid outlet cavity are formed in the shell head 2 through the middle partition 5. A plurality of partition plates 6 are arranged in the fluid inlet cavity and the fluid outlet cavity. The plurality of partition plates 6 are used to separate the inlet end and the outlet end of a plurality of fluid pipelines 13. The partition plates 6 are semi-annular structures. Each partition plate 6 separates the inlet end and the outlet end of each layer of the fluid pipeline 13.

[0042] The present invention is based on the double tube sheet assembly 4, combines the middle partition 5 and the partition 6, separates the inlet end and the outlet end of each layer of the fluid pipeline 13, and avoids direct contact between heat exchange media in different tube passes by separating different fluid channels, thereby reducing the risk of cross contamination and significantly improving the safety and reliability of the multi-stream bypass heat exchanger.

[0043] A plurality of tube-side fluid inlet ports 9 and tube-side fluid outlet ports 10 are symmetrically arranged on the shell head 2. The symmetrical tube-side fluid inlet ports 9 and tube-side fluid outlet ports 10 are respectively connected to the inlet port and the outlet port of each layer of fluid pipeline 13;

[0044] A shell-side medium inlet 11 is disposed at the upper portion of the outer shell 1 , and a shell-side medium outlet 12 is disposed at the bottom of the outer shell 1 .

[0045] The method for using the multi-stream wound tube heat exchanger provided by the present invention comprises the following steps:

[0046] A: Multiple tube-side heat exchange media enter the fluid inlet cavity formed by the corresponding middle partition 5 and the partition 6 through a plurality of tube-side fluid inlet ports 9, and then enter the fluid pipeline 13 through the corresponding inlet ports of the fluid pipeline 13;

[0047] B: Shell-side medium enters the outer shell 1 through the shell-side medium inlet port 11, and the tube-side heat exchange medium in the fluid pipeline 13 flows in the fluid pipeline 13, thereby completing heat exchange with the shell-side medium;

[0048] C: After heat exchange, the tube-side heat exchange medium flows out from the outlet end of the fluid pipeline 13 to the fluid outlet cavity formed by the corresponding middle partition 5 and the partition 6, and then is discharged from the corresponding tube-side fluid outlet end 10, and the shell-side medium is discharged through the shell-side medium outlet end 12.

[0049] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-stream tube-wound heat exchanger, characterized in that: It comprises an outer shell (1) and a shell head (2), wherein a plurality of fluid pipelines (13) are arranged in the outer shell (1), and an anti-vibration component (3) is arranged between the lead ends of the plurality of fluid pipelines (13); The outer shell (1) and the shell head (2) are connected via a double tube sheet assembly (4), and the inlet ends and outlet ends of a plurality of the fluid pipelines (13) are symmetrically arranged on the double tube sheet assembly (4); A fluid inlet cavity and a fluid outlet cavity are formed in the shell head (2) through a middle partition (5), and a plurality of partition plates (6) are arranged in each of the fluid inlet cavity and the fluid outlet cavity. The plurality of partition plates (6) are used to separate the inlet end and the outlet end of the plurality of fluid pipelines (13); A central cylinder (7) is arranged inside the outer shell (1), and a plurality of the fluid pipelines (13) are arranged in a multi-layer structure, with each layer of the fluid pipeline (13) being wound around the central cylinder (7) in a U-shaped structure; The anti-vibration assembly (3) comprises an annular metal belt (301) and an annular saddle-shaped tube support (302); A plurality of the annular saddle-shaped tube supports (302) are provided, and the lead-out ends of the multiple layers of the fluid pipelines (13) are separated and fixed by the plurality of the annular saddle-shaped tube supports (302), and the annular metal belt (301) is provided on the outside of the outermost layer of the fluid pipeline (13); The annular saddle-shaped tube support (302) is provided with saddle-shaped tube grooves (303) distributed at equal intervals, and the fluid pipeline (13) is arranged in the saddle-shaped tube grooves (303) on the annular saddle-shaped tube support (302); The double tube sheet assembly (4) comprises two tube sheets (401); Each of the tube plates (401) comprises a plurality of annular plates (402) and a circular plate (404); a convex plate structure extending downward in a stepped manner from outside to inside is formed between the plurality of annular plates (402) and the circular plate (404); the annular plates (402) and the circular plate (404) are fixedly connected by bolts (403); and the plurality of annular plates (402) and the circular plate (404) are respectively connected to the fluid pipelines (13) of each layer; The partition plates (6) are semi-annular structures, and each of the partition plates (6) separates the inlet end and the outlet end of each layer of the fluid pipeline (13); A plurality of tube-side fluid inlet ends (9) and tube-side fluid outlet ends (10) are symmetrically arranged on the shell head (2), and the symmetrical tube-side fluid inlet ends (9) and tube-side fluid outlet ends (10) are respectively connected to the inlet end and the outlet end of the fluid pipeline (13) of each layer.

2. A multi-stream wound tube heat exchanger according to claim 1, characterized in that: A gasket strip (8) is provided between the innermost fluid pipeline (13) and the central cylinder (7).

3. The multi-stream wound tube heat exchanger according to claim 1, characterized in that: The upper portion of the outer shell (1) is provided with a shell-side medium inlet end (11), and the bottom portion of the outer shell (1) is provided with a shell-side medium outlet end (12).

4. A method for using a multi-stream wound tube heat exchanger according to any one of claims 1 to 3, characterized in that: The steps include: A: Multiple tube-side heat exchange media enter the fluid inlet cavity formed by the corresponding middle partition (5) and the sub-pass partition (6) through a plurality of tube-side fluid inlet ports (9), and then enter the fluid pipeline (13) through the inlet ports of the corresponding fluid pipeline (13); B: The shell-side medium enters the outer shell (1) through the shell-side medium inlet (11), and the tube-side heat exchange medium in the fluid pipeline (13) flows in the fluid pipeline (13), thereby completing heat exchange with the shell-side medium; C: After heat exchange, the tube-side heat exchange medium flows out from the outlet end of the fluid pipeline (13) to the fluid outlet cavity formed by the corresponding middle partition (5) and the partition partition (6), and then is discharged from the corresponding tube-side fluid outlet end (10), and the shell-side medium is discharged through the shell-side medium outlet end (12).

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