Teflon tube bundle heat exchanger for producing 5-chlorovaleronitrile

Abstract

The utility model relates to the technical field of heat exchangers, and discloses a teflon tube bundle heat exchanger for 5-chlorovaleronitrile production, which comprises a heat exchanger shell, a first liquid inlet tube and a liquid outlet tube are respectively and fixedly mounted on the outer side of the heat exchanger shell, a lower sealing cover is fixedly mounted at the bottom of the heat exchanger shell, and an upper sealing cover is fixedly mounted at the top of the heat exchanger shell. Two circulating pipes are fixedly mounted at the top of the upper sealing cover, connecting pipes are fixedly mounted at the tops of the circulating pipes, and a mounting bottom plate and a mounting top plate are fixedly mounted between the circulating pipes and the connecting pipes. Two groups of circulating pipes and connecting pipes are arranged at the top of the upper sealing cover, and a group of mounting bottom plates and a group of mounting top plates are respectively arranged in the two groups of circulating pipes and connecting pipes, so that quick assembly and later independent quick maintenance of a plurality of polytetrafluoroethylene pipes are realized; and a plurality of PTFE pipes can be separated, and the bent parts of the PTFE pipes can be positioned, so that the maintenance cost is reduced while the maintenance efficiency is not reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, and particularly relates to a tetrafluoro tube bundle heat exchanger for the production of 5-chlorovaleronitrile. Background Art

[0002] A tetrafluoro tube bundle heat exchanger is a heat exchanger with polytetrafluoroethylene hoses as heat transfer components, also known as a flexible tube heat exchanger. It mainly uses two fluids at different temperatures to exchange heat through the heat transfer surface to achieve heat transfer and recovery.

[0003] Due to its unique corrosion resistance and other excellent properties, the tetrafluoro tube bundle heat exchanger is widely used in industries such as chemical engineering and pharmaceuticals. Especially when producing 5-chlorovaleronitrile, it can effectively handle and cool or heat the corrosive medium in the production process to ensure the stability and safety of the production process. At present, both ends of the tetrafluoro tube bundle inside the existing tetrafluoro tube bundle heat exchanger are directly melt-fixed on the connecting plate and installed at the connecting end of the heat exchanger shell. Therefore, considering the maintenance efficiency and cost-effectiveness, although overall replacement can ensure the heat exchanger resumes operation quickly and reduce the downtime, it will also increase the overall maintenance cost and waste of resources of other available pipelines. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a tetrafluoro tube bundle heat exchanger for the production of 5-chlorovaleronitrile, which solves the problems that the tetrafluoro tube in the related technology cannot be replaced conveniently and quickly and the maintenance cost of the tetrafluoro tube bundle heat exchanger cannot be reduced.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] A tetrafluoro tube bundle heat exchanger for the production of 5-chlorovaleronitrile includes a heat exchanger shell. A first liquid inlet pipe and a liquid outlet pipe are respectively and fixedly installed on the outside of the heat exchanger shell. A lower sealing cover is fixedly installed at the bottom of the heat exchanger shell, and an upper sealing cover is fixedly installed at the top of the heat exchanger shell. Two circulating pipes are fixedly installed on the top of the upper sealing cover. A connecting pipe is fixedly installed at the top of the circulating pipe. An installation bottom plate and an installation top plate are fixedly installed between the circulating pipe and the connecting pipe. And each installation bottom plate and installation top plate form a group. A plurality of tetrafluoro tubes are fixedly connected between two groups of installation bottom plates and installation top plates. A bundle tube plate is movably installed between the plurality of tetrafluoro tubes.

[0007] Optionally, a metal patch is fixedly installed at the center position of the top of the lower sealing cover;

[0008] Based on this, setting a metal patch on the top of the lower sealing cover can position the bending points of a plurality of tetrafluoro tubes by the bundle tube plate in the later stage.

[0009] Optionally, a first clamping groove is formed at the top of the circulation pipe, a second clamping groove is formed at the bottom of the connecting pipe, and a first limiting ring is fixedly installed on the inner side of the connecting pipe above the second clamping groove.

[0010] Based on this, by respectively forming the first clamping groove and the second clamping groove on the opposite sides of the circulation pipe and the connecting pipe, the combined body of the mounting bottom plate and the mounting top plate can be limited and installed between the circulation pipe and the connecting pipe.

[0011] Optionally, a plurality of outer insertion pipes are fixedly installed on the top of the mounting bottom plate. The outer insertion pipes are in a trumpet-shaped structure with a narrow top and a wide bottom, and the mounting bottom plate is inserted into the first clamping groove.

[0012] Optionally, a plurality of counterbores are formed in the mounting top plate, and inner insertion pipes are movably installed in the counterbores.

[0013] Optionally, a connecting seat is fixedly installed at the top of the inner insertion pipe. The longitudinal section of the connecting seat is in an inverted L-shaped structure. A second limiting ring is fixedly installed on the outer side of the connecting seat. The bottom of the connecting seat is threadedly connected in the counterbore, and the inner insertion pipe is inserted into a tetrafluoroethylene tube located in the counterbore.

[0014] Based on this, through the cooperation of the mounting bottom plate, the outer insertion pipes, the mounting top plate, and the inner insertion pipes, after one end of the tetrafluoroethylene tube is inserted and installed in the mounting bottom plate and the mounting top plate, the rapid assembly of the end of the tetrafluoroethylene tube can be realized.

[0015] Optionally, a plurality of jacks are formed in the tube bundle plate, and guide covers are fixedly installed on the tube bundle plate at both sides of the jacks. The bent part of the tetrafluoroethylene tube is inserted into the corresponding jacks.

[0016] Optionally, a counterweight is fixedly installed at the bottom of the tube bundle plate;

[0017] Based on this, by setting the counterweight at the bottom of the tube bundle plate, after a plurality of tetrafluoroethylene tubes are inserted and installed in the heat exchanger shell, the bottom of the counterweight can be adsorbed and connected to the metal patch, so as to realize the rapid positioning and limiting of the bent parts of the plurality of tetrafluoroethylene tubes.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] In the utility model, two groups of circulation pipes and connecting pipes are arranged on the top of the upper sealing cover, and a group of mounting bottom plates and mounting top plates are respectively arranged in the two groups of circulation pipes and connecting pipes, so as to realize the rapid assembly of multiple tetrafluoroethylene tubes and the subsequent separate rapid maintenance. Moreover, a tube bundle plate is arranged between the multiple tetrafluoroethylene tubes, which can separate the multiple tetrafluoroethylene tubes and position the bent parts of the tetrafluoroethylene tubes, and reduce the maintenance cost while not reducing the maintenance efficiency. Description of the Drawings

[0020] The following will further illustrate the above characteristics, technical features, advantages and their implementation manners of the present utility model in a clear and understandable manner in conjunction with the accompanying drawings.

[0021] Figure 1 It is a schematic diagram of the main structure of the present utility model;

[0022] Figure 2 It is a sectional view of the main structure of the present utility model;

[0023] Figure 3 is Figure 2 an enlarged view of part A in

[0024] Figure 4 It is a sectional view of the mounting base plate and the mounting top plate of the present utility model;

[0025] Figure 5 is Figure 2 an enlarged view of part B in

[0026] Figure 6 It is a schematic diagram of the tube bundle plate and the counterweight structure of the present utility model.

[0027] In the figure: 1. Heat exchanger housing; 2. First liquid inlet pipe; 3. Liquid outlet pipe; 4. Lower sealing cover; 5. Upper sealing cover; 6. Circulation pipe; 7. Connecting pipe; 8. Teflon pipe; 9. Mounting base plate; 10. Mounting top plate; 11. Tube bundle plate; 12. Metal patch; 13. First card slot; 14. Second card slot; 15. First limiting ring; 16. Outer insertion tube; 17. Counterbore; 18. Inner insertion tube; 19. Connecting seat; 20. Second limiting ring; 21. Jack; 22. Guide cover; 23. Counterweight. Specific embodiments

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the specific embodiments of the present utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to these drawings and other embodiments can be obtained.

[0029] To make the drawings concise, only the parts related to the utility model are schematically shown in each drawing, and they do not represent the actual structure of the product. In addition, to make the drawings concise and easy to understand, in some drawings, parts with the same structure or function are only schematically shown for one of them, or only one of them is marked. In this article, "one" not only means "only this one", but also can mean "more than one" situation, and "several" includes "two" and "more than two".

[0030] In this text, it should be noted that unless otherwise clearly stipulated and defined, the terms "installation", "connection", and "linkage" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific situations.

[0031] In addition, in the description of this application, the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0032] Embodiment 1:

[0033] Referring to Figures 1 - 6 , which is the first embodiment of this utility model, a tetrafluoro tube bundle heat exchanger for the production of 5-chlorovaleronitrile is proposed, including a heat exchanger housing 1. A first liquid inlet pipe 2 and a liquid outlet pipe 3 are respectively and fixedly installed on the outer side of the heat exchanger housing 1. A lower sealing cover 4 is fixedly installed at the bottom of the heat exchanger housing 1, and an upper sealing cover 5 is fixedly installed at the top of the heat exchanger housing 1. Two circulation pipes 6 are fixedly installed at the top of the upper sealing cover 5. A connecting pipe 7 is fixedly installed at the top of the circulation pipe 6. An installation bottom plate 9 and an installation top plate 10 are fixedly installed between the circulation pipe 6 and the connecting pipe 7. And a single installation bottom plate 9 and installation top plate 10 are taken as a group. A plurality of tetrafluoro tubes 8 are fixedly connected between two groups of installation bottom plates 9 and installation top plates 10. A bundle tube plate 11 is also movably installed between the plurality of tetrafluoro tubes 8.

[0034] A metal patch 12 is fixedly installed at the center position of the top of the lower sealing cover 4. Based on this, by setting the metal patch 12 at the top of the lower sealing cover 4, it can position the bending parts of the plurality of tetrafluoro tubes 8 by the bundle tube plate 11 in the later stage. A first card slot 13 is opened at the top of the circulation pipe 6, and a second card slot 14 is opened at the bottom of the connecting pipe 7. A first limiting ring 15 is also fixedly installed on the inner side of the connecting pipe 7 at a position above the second card slot 14. Based on this, by respectively opening the first card slot 13 and the second card slot 14 on the opposite sides of the circulation pipe 6 and the connecting pipe 7, the combined body of the installation bottom plate 9 and the installation top plate 10 can be limited and installed between the circulation pipe 6 and the connecting pipe 7.

[0035] Embodiment 2:

[0036] Referring to Figures 3 - 6, which is the second embodiment of the utility model. The embodiment is different from the first embodiment in that: a plurality of external inserts 16 are fixedly installed on the top of the installation base plate 9, and the external inserts 16 are in a trumpet-shaped structure that is narrow at the top and wide at the bottom. The installation base plate 9 is inserted and installed in the first card slot 13, and a plurality of countersunk holes 17 are opened in the installation top plate 10. An internal insert 18 is movably installed in the countersunk hole 17, and a connecting seat 19 is fixedly installed on the top of the internal insert 18. The longitudinal section of the connecting seat 19 is an inverted L-shaped structure, and a second limiting ring 20 is fixedly installed on the outside of the connecting seat 19. The bottom of the connecting seat 19 is threadedly connected to the countersunk hole 17, and the internal insert 18 is inserted and installed in the polytetrafluoroethylene tube 8 located in the countersunk hole 17. Based on this, by installing the base plate 9, the external insert The cooperation of the tube 16, the mounting top plate 10 and the inner insert tube 18 can realize the rapid assembly of the end of the polytetrafluoro tube 8 after one end of the polytetrafluoro tube 8 is inserted and installed in the mounting bottom plate 9 and the mounting top plate 10. A plurality of insertion holes 21 are opened in the tube bundle plate 11. The tube bundle plate 11 located on both sides of the insertion holes 21 is fixedly installed with guide covers 22. The bending parts of the polytetrafluoro tube 8 are inserted and installed in the corresponding insertion holes 21. A counterweight block 23 is fixedly installed at the bottom of the tube bundle plate 11. Based on this, a counterweight block 23 is arranged at the bottom of the tube bundle plate 11, so that after the plurality of polytetrafluoro tubes 8 are inserted and installed in the heat exchanger shell 1, the bottom of the counterweight block 23 is adsorbed and connected with the metal patch 12, thereby realizing the rapid positioning and limiting of the bending parts of the plurality of polytetrafluoro tubes 8.

[0037] It should be noted that the utility model is a polyfluoro tube bundle heat exchanger for the production of 5-chlorovaleronitrile. When one or several polyfluoro tubes 8 need to be replaced, the connecting seats 19 at both ends of the corresponding polyfluoro tubes 8 are directly rotated with the help of tools, so that the connecting seats 19 are rotated out of the corresponding countersunk holes 17 and drive the inner insert tube 18 at the bottom to be separated from the polyfluoro tube 8. Then, the two ends of the polyfluoro tube 8 to be replaced can be respectively pulled out from the corresponding mounting top plate 10 and the outer insert tube 16, and the polyfluoro tube 8 can be pulled out from the corresponding insertion hole 21. Then, the new polyfluoro tube 8 can be inserted and installed in the corresponding insertion hole 21 first, and the two ends of the new polyfluoro tube 8 can be respectively inserted and installed in the corresponding outer insert tube 16, so as to The PTFE tube 8 provides a downward friction resistance, and then the connecting seat 19 can be re-threaded into the corresponding countersunk hole 17, so that the connecting seat 19 drives the inner tube 18 to be inserted into the PTFE tube 8, and the structure of the PTFE tube 8 being narrow at the bottom and wide at the top is used to make one end of the PTFE tube 8 sealed and fixed in the countersunk hole 17 and placed between the outer tube 16 and the inner tube 18, and then, the other end of the PTFE tube 8 can be operated in the same way as above, thereby completing the rapid replacement of the PTFE tube 8, and then, multiple PTFE tubes 8 are inserted into the heat exchanger shell 1 through the upper sealing cover 5, and the bundle tube plate 11 cooperates with the metal patch 12 to keep the bending parts of the multiple PTFE tubes 8 in a vertical posture, and the bottom of the counterweight block 23 is automatically positioned and adsorbed on the metal patch 12.

[0038] The foregoing has shown and described the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not restricted by the above-mentioned embodiments, and what is described in the above-mentioned embodiments and the specification is only to illustrate the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and all these changes and improvements fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A tetrafluoro tube bundle heat exchanger for the production of 5-chlorovaleronitrile, characterized in that: It includes a heat exchanger housing (1), a first liquid inlet pipe (2) and a liquid outlet pipe (3) are respectively and fixedly installed on the outer side of the heat exchanger housing (1), a lower sealing cover (4) is fixedly installed at the bottom of the heat exchanger housing (1), an upper sealing cover (5) is fixedly installed at the top of the heat exchanger housing (1), two circulation pipes (6) are fixedly installed at the top of the upper sealing cover (5), a connecting pipe (7) is fixedly installed at the top of the circulation pipe (6), and an installation bottom plate (9) and an installation top plate (10) are fixedly installed between the circulation pipe (6) and the connecting pipe (7). And a single installation bottom plate (9) and installation top plate (10) form a group, and a plurality of tetrafluoro pipes (8) are fixedly connected between two groups of installation bottom plates (9) and installation top plates (10). A plurality of bundle tube plates (11) are also movably installed between the plurality of tetrafluoro pipes (8).

2. The tetrafluoro tube bundle heat exchanger for the production of 5-chlorovaleronitrile according to claim 1, characterized in that: A metal patch (12) is fixedly installed at the center position of the top of the lower sealing cover (4).

3. A tetrafluoro tube bundle heat exchanger for the production of 5-chlorovaleronitrile according to claim 1, characterized in that: A first card slot (13) is opened at the top of the circulation pipe (6), a second card slot (14) is opened at the bottom of the connecting pipe (7), and a first limiting ring (15) is also fixedly installed inside the connecting pipe (7) at a position above the second card slot (14).

4. The tetrafluoro tube bundle heat exchanger for the production of 5-chlorovaleronitrile according to claim 3, wherein: A plurality of outer insertion pipes (16) are fixedly installed at the top of the installation bottom plate (9), and the outer insertion pipes (16) are in a trumpet-shaped structure with a narrow top and a wide bottom. The installation bottom plate (9) is inserted into the first card slot (13).

5. The tetrafluoro tube bundle heat exchanger for the production of 5-chlorovaleronitrile according to claim 4, characterized in that: A plurality of counterbores (17) are opened in the installation top plate (10), and inner insertion pipes (18) are movably installed in the counterbores (17).

6. The tetrafluoro tube bundle heat exchanger for the production of 5-chlorovaleronitrile according to claim 5, characterized in that: A connecting seat (19) is fixedly installed at the top of the inner insertion pipe (18). The longitudinal section of the connecting seat (19) is an inverted L-shaped structure. A second limiting ring (20) is fixedly installed on the outer side of the connecting seat (19). The bottom of the connecting seat (19) is threadedly connected in the counterbore (17), and the inner insertion pipe (18) is inserted into the tetrafluoro pipe (8) located in the counterbore (17).

7. The tetrafluoro tube bundle heat exchanger for the production of 5-chlorovaleronitrile according to claim 2, wherein: A plurality of insertion holes (21) are opened in the bundle tube plate (11), and guide covers (22) are fixedly installed on the bundle tube plate (11) at positions on both sides of the insertion holes (21). The bent parts of the tetrafluoro pipes (8) are inserted into the corresponding insertion holes (21).

8. A tetrafluoro tube bundle heat exchanger for the production of 5-chlorovaleronitrile according to claim 7, characterized in that: A weight block (23) is fixedly installed at the bottom of the bundle tube plate (11).

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