Composite sealing structure of graphite heat exchanger in mixed acid medium

Abstract

This utility model relates to a composite sealing structure for a mixed acid medium graphite heat exchanger, belonging to the technical field of graphite heat exchangers. It includes a graphite heat exchanger and a feed seat. The top of the graphite heat exchanger is provided with a disassembly and assembly structure for assembling and disassembling the feed seat. The disassembly and assembly structure includes a sealing ring fixedly connected to the outer peripheral wall of the feed seat, a sealing seat slidably connected to the inner peripheral wall of the feed seat, a pressing plate fixedly connected to the top of the sealing seat, a limit ring fixedly connected to the inner peripheral wall of the feed seat, and two mounting plates fixedly connected to the outer peripheral wall of the pressing plate. This composite sealing structure for a mixed acid medium graphite heat exchanger seals the feed seat through the sealing ring, seals the interior of the feed seat through the sealing seat, and fixes the feed seat to the top of the graphite heat exchanger through the pressing plate, mounting plate, side plate, fixed threaded rod, and threaded seat, without requiring replacement of the internal structure of the graphite heat exchanger.

Description

Technical Field

[0001] This utility model relates to the field of graphite heat exchanger technology, specifically to a composite sealing structure for a mixed acid medium graphite heat exchanger. Background Technology

[0002] The mixed acid medium graphite heat exchanger is a heat exchange device specially designed for handling highly corrosive mixed acid media. Its core heat transfer element is made of graphite material with excellent corrosion resistance to ensure long-term stable operation under high temperature, high pressure and harsh chemical environment, and effectively prevent the medium from corroding the equipment.

[0003] Because the internal medium temperature of a heat exchanger is typically high, while the external environment or feed temperature may be low, the equipment experiences repeated hot and cold cycles during operation and shutdown. These drastic temperature changes cause varying degrees of thermal expansion and contraction in the graphite material and its connected metal components. The coefficient of thermal expansion of graphite differs from that of metals; this difference, under temperature cycling, creates continuously changing stress at the connection between the feed seat and the heat exchanger body or pipes. Over time, this can lead to micro-cracks, wear, or loosening of the sealing surface, ultimately causing media leakage, threatening production safety, and causing environmental pollution. Therefore, to maintain the equipment's sealing performance and operational reliability, operators need to regularly inspect the feed seat and replace it when necessary.

[0004] Currently, the feed seat typically requires multiple and precise connections with the heat exchanger shell, graphite tube sheet, and external piping. To ensure sealing performance under harsh operating conditions, the sealing structure itself is designed to be quite complex, requiring careful handling during installation to avoid damage. Due to the brittleness of graphite, extra care must be taken with the feed seat and its connection to graphite components during disassembly and installation. Slight carelessness can cause the graphite components to crack or the sealing surface to be damaged. This not only increases the difficulty of operation but also greatly prolongs the maintenance time. This complex installation and replacement process not only requires high skill levels from operators but also consumes time and increases maintenance costs. Therefore, a composite sealing structure for mixed acid medium graphite heat exchangers is proposed to solve the problems mentioned above. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a composite sealing structure for a mixed acid medium graphite heat exchanger, which has advantages such as improved convenience of replacing the feed seat. It solves the problem that the feed seat of existing graphite heat exchangers is difficult to disassemble and assemble, and that slight carelessness can cause the graphite components to crack or the sealing surface to be damaged. This not only increases the difficulty of operation, but also greatly prolongs the maintenance time.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A composite sealing structure for a mixed acid medium graphite heat exchanger includes a graphite heat exchanger and a feed seat, wherein the top of the graphite heat exchanger is provided with a disassembly and assembly structure for disassembling and assembling the feed seat.

[0008] The disassembly and assembly structure includes a sealing ring fixedly connected to the outer peripheral wall of the feed seat, a sealing seat slidably connected to the inner peripheral wall of the feed seat, a pressing plate fixedly connected to the top of the sealing seat, a limit ring fixedly connected to the inner peripheral wall of the feed seat, two mounting plates fixedly connected to the outer peripheral wall of the pressing plate, two side plates fixedly connected to the outer peripheral wall of the feed seat, a fixed threaded rod slidingly passing through the interior of the mounting plate, and two threaded seats fixedly connected to the top of the graphite heat exchanger.

[0009] Furthermore, a support rod is fixedly connected to the bottom of the mounting plate, and a positioning groove is provided inside the side plate. The support rod is slidably connected inside the positioning groove, and the size of the support rod is adapted to the positioning groove.

[0010] Furthermore, a support ring is fixedly connected to the outer peripheral wall of the support rod, and two support arms are fixedly connected to the top of the support ring.

[0011] Furthermore, there are four support arms, and the four support arms are fixedly connected to the bottom of the two mounting plates on the side away from the support ring, and the support arms are installed at an inclined angle.

[0012] Furthermore, a sealing groove is provided on the top of the graphite heat exchanger, and the sealing ring is slidably connected inside the sealing groove, with the size of the sealing ring matching that of the sealing groove.

[0013] Furthermore, the sealing seat is slidably connected to the top of the limiting ring, and the sealing seat is a cylinder.

[0014] Furthermore, both the mounting plate and the side plate have through holes inside, and the fixing threaded rod slides through the inside of the through hole, with the size of the fixing threaded rod matching that of the through hole.

[0015] Furthermore, the fixed threaded rod is threaded inside the threaded seat, and the two fixed threaded rods are symmetrically distributed from left to right.

[0016] Compared with the prior art, this utility model provides a composite sealing structure for a mixed acid medium graphite heat exchanger, which has the following beneficial effects:

[0017] This mixed acid medium graphite heat exchanger features a composite sealing structure. The sealing ring seals the feed seat, while the sealing seat provides a stronger seal inside the feed seat. The feed seat is then fixed to the top of the graphite heat exchanger by pressing the mounting plate, side plate, threaded rod, and threaded seat. This eliminates the need to replace the internal structure of the graphite heat exchanger, significantly reducing the complexity of feed seat replacement and installation, and thus minimizing downtime. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural schematic diagram of the present utility model;

[0019] Figure 2 This is a cross-sectional view of the feed seat of this utility model;

[0020] Figure 3 This utility model Figure 1 A magnified structural diagram of point A is shown.

[0021] In the diagram: 1. Graphite heat exchanger; 2. Feed seat; 3. Sealing ring; 4. Sealing seat; 5. Pressing plate; 6. Limiting ring; 7. Mounting plate; 8. Side plate; 9. Fixed threaded rod; 10. Threaded seat; 11. Support rod; 12. Support ring; 13. Support arm. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figures 1 to 3 The mixed acid medium graphite heat exchanger composite sealing structure in this embodiment includes a graphite heat exchanger 1 and a feed seat 2. The top of the graphite heat exchanger 1 is provided with a disassembly and assembly structure for disassembling and assembling the feed seat 2.

[0024] In this embodiment, the disassembly and assembly structure includes a sealing ring 3 fixedly connected to the outer peripheral wall of the feed seat 2. A sealing groove is provided on the top of the graphite heat exchanger 1. The sealing ring 3 is slidably connected inside the sealing groove. The size of the sealing ring 3 and the sealing groove are adapted to each other. A sealing seat 4 is slidably connected to the inner peripheral wall of the feed seat 2. A pressing plate 5 is fixedly connected to the top of the sealing seat 4. A limiting ring 6 is fixedly connected to the inner peripheral wall of the feed seat 2. The sealing seat 4 is slidably connected to the top of the limiting ring 6. The sealing seat 4 is a cylinder.

[0025] It should be noted that the sealing ring 3 and the sealing seat 4 effectively improve the sealing performance of the connection between the feed seat 2 and the graphite heat exchanger 1.

[0026] In this embodiment, two mounting plates 7 are fixedly connected to the outer peripheral wall of the pressing plate 5, and two side plates 8 are fixedly connected to the outer peripheral wall of the feed seat 2. A fixed threaded rod 9 slides through the interior of the mounting plate 7. Both the mounting plate 7 and the side plate 8 have through holes. The fixed threaded rod 9 slides through the interior of the through hole. The size of the fixed threaded rod 9 is adapted to the through hole. Two threaded seats 10 are fixedly connected to the top of the graphite heat exchanger 1. The fixed threaded rod 9 is threadedly connected to the interior of the threaded seat 10. The two fixed threaded rods 9 are symmetrically distributed from left to right.

[0027] It should be noted that the feed seat 2 and the sealing seat 4 are securely installed by fixing the threaded rod 9, the mounting plate 7 and the side plate 8, which improves the convenience of disassembly and assembly.

[0028] In this embodiment, a support rod 11 is fixedly connected to the bottom of the mounting plate 7, and a positioning groove is provided inside the side plate 8. The support rod 11 is slidably connected inside the positioning groove, and the size of the support rod 11 is adapted to the positioning groove. A support ring 12 is fixedly connected to the outer peripheral wall of the support rod 11, and two support arms 13 are fixedly connected to the top of the support ring 12. There are four support arms 13, and the side of the four support arms 13 away from the support ring 12 is fixedly connected to the bottom of the two mounting plates 7 respectively. The support arms 13 are installed at an inclined angle.

[0029] It should be noted that the support rod 11 supports the mounting plate 7, which not only improves the stability of the mounting plate 7 during installation, but also improves the stability of the sealing seat 4 during sealing and flipping.

[0030] It should be noted that the sealing seat 4 is made of graphite, which has excellent corrosion resistance and high temperature resistance, making it suitable for mixed acid media and high-temperature conditions. In addition, graphite has good thermal conductivity, which helps to reduce the impact of temperature fluctuations on the equipment.

[0031] It should be noted that the support ring 12 and support arm 13 significantly reduce the impact of the pressure on the fixed threaded rod 9.

[0032] The working principle of the above embodiments is as follows:

[0033] First, slide the feed seat 2 into the inside of the graphite heat exchanger 1. At this time, the sealing ring 3 is installed on the top of the graphite heat exchanger 1. Then, slide the sealing seat 4 into the inside of the feed seat 2. When the sealing seat 4 contacts the limiting ring 6, it stops sliding. At the same time, the support rod 11 will be installed into the inside of the side plate 8. Finally, slide the fixing threaded rod 9 through the inside of the mounting plate 7 and the side plate 8 and then thread it into the inside of the threaded seat 10. At this time, the installation of the feed seat 2 is completed.

[0034] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods, and any method that can achieve its beneficial effects can be implemented.

[0035] It should be noted that the orientations or positional relationships indicated herein are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the purpose of facilitating the description of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A composite sealing structure for a mixed acid medium graphite heat exchanger, comprising a graphite heat exchanger (1) and a feed seat (2), characterized in that: The graphite heat exchanger (1) is provided with a disassembly and assembly structure on the top for disassembling and assembling the feed seat (2); The disassembly and assembly structure includes a sealing ring (3) fixedly connected to the outer peripheral wall of the feed seat (2), a sealing seat (4) slidably connected to the inner peripheral wall of the feed seat (2), a pressing plate (5) fixedly connected to the top of the sealing seat (4), a limit ring (6) fixedly connected to the inner peripheral wall of the feed seat (2), two mounting plates (7) fixedly connected to the outer peripheral wall of the pressing plate (5), two side plates (8) fixedly connected to the outer peripheral wall of the feed seat (2), a fixed threaded rod (9) slidably passing through the interior of the mounting plate (7), and two threaded seats (10) fixedly connected to the top of the graphite heat exchanger (1).

2. The mixed acid medium graphite heat exchanger composite sealing structure according to claim 1, characterized in that: The bottom of the mounting plate (7) is fixedly connected to a support rod (11), and the side plate (8) has a positioning groove inside. The support rod (11) is slidably connected inside the positioning groove, and the size of the support rod (11) is adapted to the positioning groove.

3. The mixed acid medium graphite heat exchanger composite sealing structure according to claim 2, characterized in that: The outer peripheral wall of the support rod (11) is fixedly connected to a support ring (12), and the top of the support ring (12) is fixedly connected to two support arms (13).

4. The mixed acid medium graphite heat exchanger composite sealing structure according to claim 3, characterized in that: The number of the support arms (13) is four. The four support arms (13) are fixedly connected to the bottom of the two mounting plates (7) on the side away from the support ring (12). The support arms (13) are installed at an inclined angle.

5. The mixed acid medium graphite heat exchanger composite sealing structure according to claim 1, characterized in that: The graphite heat exchanger (1) has a sealing groove on its top, and the sealing ring (3) is slidably connected inside the sealing groove. The size of the sealing ring (3) is adapted to the size of the sealing groove.

6. The mixed acid medium graphite heat exchanger composite sealing structure according to claim 1, characterized in that: The sealing seat (4) is slidably connected to the top of the limiting ring (6), and the sealing seat (4) is a cylinder.

7. The mixed acid medium graphite heat exchanger composite sealing structure according to claim 1, characterized in that: Both the mounting plate (7) and the side plate (8) have through holes inside. The fixed threaded rod (9) slides through the inside of the through hole, and the size of the fixed threaded rod (9) is adapted to the through hole.

8. The mixed acid medium graphite heat exchanger composite sealing structure according to claim 1, characterized in that: The fixed threaded rod (9) is threaded inside the threaded seat (10), and the two fixed threaded rods (9) are symmetrically distributed from left to right.

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