Leak-proof structure of multi-strand wound tube type heat exchanger

Abstract

The utility model discloses a leakproof structure of a multi-stream coiled tube type heat exchanger, which comprises a double-tube-plate component arranged between an outer shell and a shell sealing head, and inlet ends and outlet ends of a plurality of groups of fluid pipelines in the outer shell are symmetrically arranged on the double-tube-plate component; a middle partition plate and a pass partition plate are arranged in the shell end socket, and the middle partition plate and the pass partition plate are used for dividing the inlet ends and the outlet ends of the multiple sets of fluid pipelines into a plurality of fluid medium inlet cavities and a plurality of fluid medium outlet cavities. A plurality of groups of fluid pipelines are fixed through the upper tube plate assemblies and the lower tube plate assemblies, and the two upper tube plate assemblies and the two lower tube plate assemblies are adopted, so that even if one tube plate leaks, fluid cannot directly flow into a shell pass or a tube pass, cross contamination can be effectively prevented, damage to heat exchanger equipment and interruption of production are avoided, and the production efficiency is improved. It is ensured that the heat exchanger can still keep stable performance under the severe or abnormal working condition, and the anti-leakage performance of the heat exchanger is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat exchangers, and particularly relates to a leakage prevention structure of a multi-stream wound tube heat exchanger. Background Technique

[0002] The wound tube heat exchanger is a heat exchange device widely used in industrial production. The application prospect of the wound tube heat exchanger is very broad. First of all, with the country's high attention to environmental protection and energy conservation, the wound tube heat exchanger, as an efficient and energy-saving heat exchange device, is increasingly recognized and favored by the market. Especially in industrial fields such as petroleum, chemical industry, and metallurgy, its application has become one of the main means to promote the adjustment of the energy structure and the promotion of green transformation and upgrading. Secondly, the wound tube heat exchanger can be applied to the heat exchange between various media, such as steam-water, water-oil, air-water, air-gas, etc., and has a wide application prospect in different industrial fields. In addition, the wound tube heat exchanger has a long service life, a simple structure, convenient maintenance, and a lower use cost than other heat exchange devices, so it also has more advantages in the market.

[0003] The working principle of the wound 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 a spiral tube with a smaller inner diameter of the pipe and a fixed tube with a larger outer diameter of the pipe. The internal fluid is generally a liquid or a gas, while the external fluid is cooling water or steam. When the internal fluid flows in the spiral tube, the heat it carries will be conducted through the pipe wall to the outer surface of the fixed tube, and then dissipated through the absorption of the external fluid, so as to achieve heat exchange.

[0004] The multi-stream wound tube heat exchanger is used in occasions where multiple working media need to be processed simultaneously, a large amount of heat needs to be transferred under a small temperature difference, and the operating pressure of the medium inside the pipe is relatively high. Since the multi-stream wound tube heat exchanger processes multiple working media, the problems of leakage prevention and cross-contamination between multiple working media need to be solved urgently. For this reason, we propose a leakage prevention structure of a multi-stream wound tube heat exchanger. Content of the Utility Model

[0005] The purpose of the utility model is to provide a leakage prevention structure of a multi-stream wound tube heat exchanger to solve the problems put forward in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A leakage prevention structure of a multi-stream wound tube heat exchanger, including a double tube sheet assembly arranged between the outer shell and the shell head, and the inlet ends and outlet ends of multiple groups of fluid pipes in the outer shell are symmetrically arranged on the double tube sheet assembly;

[0007] An intermediate partition plate and a partition plate for separating processes are arranged inside the shell head. The intermediate partition plate and the partition plate for separating processes are used for separating the inlet ends and the outlet ends of multiple groups of the fluid pipelines to form a plurality of fluid medium inlet cavities and fluid medium outlet cavities.

[0008] Preferably, the double tube sheet assembly includes an upper tube sheet assembly and a lower tube sheet assembly;

[0009] Both the upper tube sheet assembly and the lower tube sheet assembly include a plurality of annular plates and a circular plate. The plurality of annular plates and the circular plate form a convex plate structure that steps down from the outside to the inside.

[0010] The inlet ends and the outlet ends of multiple groups of the fluid pipelines are symmetrically arranged on the plurality of annular plates and the circular plate respectively.

[0011] Preferably, the plurality of annular plates and the circular plate are connected by fixing blocks and bolts, and the annular plates, the circular plate and the fixing blocks are hermetically connected through gaskets.

[0012] Preferably, the outermost annular plate is hermetically connected to the outer shell and the shell head through a gasket.

[0013] Preferably, the intermediate partition plate is arranged in the middle of the shell head with the inlet ends and the outlet ends of multiple groups of the fluid pipelines as the axes.

[0014] Preferably, a plurality of partition plates for separating processes are provided. The plurality of partition plates for separating processes are arranged inside the shell head and are used for separating the inlet ends and the outlet ends of multiple groups of the fluid pipelines.

[0015] Preferably, the partition plate for separating processes is of a semi-circular structure.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] 1. The present utility model is provided with a double tube sheet assembly. The multiple groups of fluid pipelines are fixed by the upper tube sheet assembly and the lower tube sheet assembly. By adopting two upper tube sheet assemblies and lower tube sheet assemblies, even if one tube sheet leaks, the fluid will not directly flow into the shell side or the tube side, which can effectively prevent cross-contamination, avoid the damage of the heat exchanger equipment and the interruption of production, ensure that the heat exchanger can still maintain stable performance under harsh or abnormal working conditions, and improve the leak-proof performance of the heat exchanger;

[0018] 2. The present utility model is provided with an intermediate partition plate and a partition plate for separating processes. On the basis of the double tube sheet assembly, the intermediate partition plate and the partition plate for separating processes are used for separating the inlet ends and the outlet ends of multiple groups of fluid pipelines to form a plurality of fluid medium inlet cavities and fluid medium outlet cavities. By separating different fluid channels, the direct contact between different fluids is avoided, and the risk of cross-contamination is reduced;

[0019] 3. The utility model is provided with a gasket to achieve effective sealing between the annular plate, the circular plate, the outer shell and the shell head, improve the sealing performance of the heat exchanger, and further improve the anti-leakage performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic cross-sectional structure view of the utility model;

[0021] Figure 2 is Figure 1 an enlarged structure view of A in

[0022] In the figure: 1. Outer shell; 2. Shell head; 3. Double tube sheet assembly; 301. Upper tube sheet assembly; 302. Lower tube sheet assembly; 30a. Annular plate; 30b. Circular plate; 30c. Fixed block; 30d. Bolt; 30e. Gasket; 4. Fluid pipeline; 5. Intermediate partition; 6. Baffle for dividing flow path. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] 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 of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0024] Please refer to Figure 1 - Figure 2 , the anti-leakage structure of the multi-stream wound tube heat exchanger provided by the present utility model includes a double tube sheet assembly 3 arranged between the outer shell 1 and the shell head 2. The inlet ends and outlet ends of multiple groups of fluid pipelines 4 in the outer shell 1 are symmetrically arranged on the double tube sheet assembly 3. The double tube sheet assembly 3 includes an upper tube sheet assembly 301 and a lower tube sheet assembly 302; both the upper tube sheet assembly 301 and the lower tube sheet assembly 302 include a plurality of annular plates 30a and a circular plate 30b. The plurality of annular plates 30a and a circular plate 30b form a convex plate structure that steps down from the outside to the inside; the inlet ends and outlet ends of multiple groups of fluid pipelines 4 are symmetrically arranged on the plurality of annular plates 30a and a circular plate 30b respectively;

[0025] The utility model is provided with a double tube sheet assembly 3. The multiple groups of fluid pipelines 4 are fixed by the upper tube sheet assembly 301 and the lower tube sheet assembly 302. By using two upper tube sheet assemblies 301 and lower tube sheet assemblies 302, even if one tube sheet leaks, the fluid will not directly flow into the shell side or the tube side, which can effectively prevent cross-contamination, avoid damage to the heat exchanger equipment and interruption of production, ensure that the heat exchanger can still maintain stable performance under harsh or abnormal working conditions, and improve the anti-leakage performance of the heat exchanger;

[0026] A middle partition plate 5 and a baffle plate 6 are arranged inside the shell head 2. The middle partition plate 5 and the baffle plate 6 are used to separate the inlet ends and outlet ends of multiple groups of fluid pipelines 4 to form multiple fluid medium inlet cavities and fluid medium outlet cavities. The middle partition plate 5 is arranged in the middle of the shell head 2 with the inlet ends and outlet ends of multiple groups of fluid pipelines 4 as the axes. There are multiple baffle plates 6, and the multiple baffle plates 6 are arranged inside the shell head 2 and are used to separate the inlet ends and outlet ends of multiple groups of fluid pipelines 4. The baffle plate 6 is of a semi-circular structure;

[0027] The utility model is provided with a middle partition plate 5 and a baffle plate 6. On the basis of the double tube sheet assembly 3, the middle partition plate 5 and the baffle plate 6 are used to separate the inlet ends and outlet ends of multiple groups of fluid pipelines 4 to form multiple fluid medium inlet cavities and fluid medium outlet cavities. By separating different fluid channels, direct contact between different fluids is avoided, and the risk of cross-contamination is reduced.

[0028] In this embodiment, as Figure 1 - Figure 2 shown, a plurality of annular plates 30a and a circular plate 30b are connected by fixing blocks 30c and bolts 30d, and the annular plates 30a, the circular plate 30b and the fixing blocks 30c are hermetically connected by gaskets 30e. The outermost annular plate 30a and the outer shell 1 and the shell head 2 are hermetically connected by gaskets 30e;

[0029] The utility model is provided with a gasket 30e to achieve effective sealing between the annular plate 30a, the circular plate 30b, the outer shell 1 and the shell head 2, improve the sealing performance of the heat exchanger, and further improve the anti-leakage performance.

[0030] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A leakage prevention structure for a multi-stream tube-wound heat exchanger, characterized in that: It comprises a double tube sheet assembly (3) arranged between an outer shell (1) and a shell head (2), wherein the inlet ends and outlet ends of a plurality of groups of fluid pipelines (4) in the outer shell (1) are symmetrically arranged on the double tube sheet assembly (3); An intermediate partition (5) and a partition plate (6) are provided in the shell head (2); the intermediate partition (5) and the partition plate (6) are used to separate the inlet ends and outlet ends of a plurality of groups of fluid pipelines (4) to form a plurality of fluid medium inlet cavities and fluid medium outlet cavities.

2. The anti-leakage structure of a multi-stream wound tube heat exchanger according to claim 1, characterized in that: The double tube sheet assembly (3) comprises an upper tube sheet assembly (301) and a lower tube sheet assembly (302); The upper tube plate assembly (301) and the lower tube plate assembly (302) both comprise a plurality of annular plates (30a) and a circular plate (30b), wherein the plurality of annular plates (30a) and the circular plate (30b) form a convex plate structure extending downward in a stepped manner from outside to inside; The inlet ends and outlet ends of the plurality of groups of fluid pipes (4) are symmetrically arranged on the plurality of annular plates (30a) and one circular plate (30b), respectively.

3. The anti-leakage structure of a multi-stream wound tube heat exchanger according to claim 2, characterized in that: The plurality of annular plates (30a) and one circular plate (30b) are connected via a fixing block (30c) and a bolt (30d), and the annular plates (30a), the circular plates (30b) and the fixing block (30c) are sealedly connected via a sealing gasket (30e).

4. The anti-leakage structure of a multi-stream wound tube heat exchanger according to claim 3, characterized in that: The outermost annular plate (30a) and the outer shell (1) and the shell head (2) are sealed and connected via a sealing gasket (30e).

5. The anti-leakage structure of a multi-stream wound tube heat exchanger according to claim 1, characterized in that: The middle partition plate (5) is arranged in the middle of the shell head (2) with the inlet ends and outlet ends of the plurality of groups of fluid pipelines (4) as axes.

6. The anti-leakage structure of a multi-stream wound tube heat exchanger according to claim 5, characterized in that: A plurality of the partition plates (6) are provided, and the plurality of partition plates (6) are arranged in the shell head (2) and are used to separate the inlet ends and outlet ends of a plurality of groups of the fluid pipelines (4).

7. The anti-leakage structure of a multi-stream wound tube heat exchanger according to claim 6, characterized in that: The path partition (6) is a semicircular structure.

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