A tantalum lined tube sheet for use in a shell and tube heat exchanger

Abstract

The utility model discloses a kind of lining tantalum tube plate for tube-in-tube heat exchanger, including tube sheet body, the mounting hole for installing heat exchange tube is provided on the tube sheet body;The upper end surface of tube sheet body is provided with a layer of tantalum lining plate, but lining plate is also provided with the tantalum tube corresponding with the position of mounting hole, tantalum tube is vertically corresponding with tantalum lining plate, the outer diameter size of tantalum tube is adapted to the inner diameter size of the mounting hole, tantalum tube is correspondingly extended into mounting hole, when installing heat exchange tube in mounting hole, tantalum tube and tantalum lining plate are fixed by heat exchange tube compression.The device is provided with tantalum lining plate on the upper end surface of tube sheet body 1, tantalum tube is provided on tantalum lining plate, and mounting hole is further provided on tube sheet body 1, tantalum tube is correspondingly extended and set in mounting hole, and tantalum tube is fixed by expansion in the form of setting heat exchange tube in mounting hole, so that tantalum lining plate is fixed as a whole, the corrosion resistance and heat resistance of the connecting portion of tube sheet and heat exchange tube in heat exchanger can be effectively improved, and the sealing property is also improved.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger technology, specifically a tantalum tube sheet for shell-and-tube heat exchangers. Background Technology

[0002] Existing tantalum tube-and-shell heat exchangers, such as the "A Tantalum Tube-and-Shell Heat Exchanger" disclosed in Publication No. CN222670774U, typically include two tantalum tube sheets (upper and lower) and heat exchange tubes installed between them. Two different media pass through the inside and outside of the heat exchange tubes, respectively, to achieve heat exchange. In this structure, the connection between the upper and lower tube sheets and the heat exchange tubes is crucial because this area needs to withstand harsh environments requiring high temperature and corrosion resistance. Existing tantalum heat exchangers possess good high temperature and corrosion resistance, and therefore can be widely used in existing heat exchanger technologies. However, the installation design of the connection between the heat exchange tubes and the tube sheet body remains a significant technical problem that needs to be solved.

[0003] In existing technologies, such as the "Tube Sheet Structure in Tantalum Heat Exchanger" disclosed in application publication number CN105202964A, the tube sheet body has several tube holes for passing through heat exchange tubes. The inner shell side of the tantalum heat exchanger on the tube sheet body is only provided with a liner plate. The liner plate has several liner holes, each with a convex flange at the opening. A tantalum liner tube is installed in each tube hole. The outer wall of each tantalum liner tube is tightly sealed to the inner wall of the corresponding tube hole. The inner end of each tantalum liner tube is welded and fixedly sealed to the flange of the corresponding liner hole on the liner plate. The outer end of each tantalum liner tube extends from the tube hole and is welded and fixedly sealed to the outer wall of the heat exchange tube passing through it. This eliminates the need for a traditional titanium transition plate, and the thickness of the liner plate can be greatly reduced, thereby effectively reducing the manufacturing cost of the tube sheet.

[0004] The above technical solution uses a tantalum liner inside the tube hole to achieve docking with the heat exchange tube. The heat exchange tube is directly installed inside the tube hole through expansion and sealing. The tantalum liner provides good corrosion resistance and high temperature resistance. However, during the actual installation of the heat exchange tube, the tube hole itself is designed as a through hole. Therefore, even with expansion and sealing, there are still issues with poor sealing and unstable installation. The overall through hole design is not reasonable.

[0005] Therefore, in order to solve the above problems, it is necessary to develop a tantalum tube sheet for shell and tube heat exchangers with a reasonable structure and improved sealing and safety performance. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing technologies by providing a tantalum tube sheet for shell-and-tube heat exchangers; the technical solution is as follows:

[0007] A tantalum tube sheet for a shell-and-tube heat exchanger includes a tube sheet body with a plurality of mounting holes for installing heat exchange tubes. A tantalum liner is provided on the upper end face of the tube sheet body, and a tantalum tube corresponding to the position of the mounting hole is also provided on the liner. The tantalum tube is perpendicular to the tantalum liner, and the outer diameter of the tantalum tube is adapted to the inner diameter of the mounting hole. The tantalum tube extends into the mounting hole. When a heat exchange tube is installed in the mounting hole, the tantalum tube and the liner are pressed and fixed by the heat exchange tube.

[0008] Furthermore, the outer diameter of the tantalum liner is smaller than the outer diameter of the tube sheet body, and the tantalum liner does not cover the entire upper surface of the tube sheet body. The tantalum liner on the upper surface of this device is not fixedly installed, so it does not need to be fixedly installed as a whole, nor does it need to be fully covered. As long as the structure is reasonable, it is fine.

[0009] Furthermore, the tube sheet body is made of silicon carbide, and its outer diameter is 360 mm and its thickness is 30 mm; the tantalum liner has an outer diameter of 268 mm and a thickness of 0.5 mm.

[0010] Furthermore, the mounting hole is configured as a stepped hole, and the tantalum tube extending into the mounting hole is configured as a stepped tube structure. One of the technical points of this device is that the mounting hole is configured as a stepped hole, and the tantalum tube is also configured as a stepped tube. Therefore, during actual installation, the stability of the expansion can be increased by the stepped structure.

[0011] Furthermore, the mounting hole is provided with three steps, and the inner diameter of the three stepped holes increases sequentially from top to bottom. The tantalum tube is provided with two steps, and the tantalum tube extends from top to bottom to the second step position of the mounting hole, without covering the entire mounting hole.

[0012] Furthermore, the inner diameter of the first stepped hole of the mounting hole is set to 20mm and the height is set to 12mm; the inner diameter of the second stepped hole is set to 24mm and the height is set to 13mm; and the inner diameter of the third stepped hole is set to 26mm and the height is set to 5mm.

[0013] Furthermore, the tube sheet body has a total of 24 mounting holes, which are evenly distributed; and the distance between two adjacent mounting holes is set to 32mm; the reasonable setting of the position and number of mounting holes can effectively improve the heat exchange efficiency and quality of the heat exchange device.

[0014] Furthermore, the edge of the tube sheet body is provided with 12 first threaded holes and 12 second threaded holes. The first threaded holes and the second threaded holes are located on the same circumference and are staggered. The inner diameter of the first threaded hole is set to 26 mm and the inner diameter of the second threaded hole is set to 16 mm. The first threaded holes and the second threaded holes provided in this device are used to install and connect external mechanical parts, such as threaded rods, and can be designed according to specific usage conditions.

[0015] Furthermore, the lower end face of the tube sheet body is provided with a ring groove, the groove width of which is set to 31mm; in this device, the ring groove can be used to install the outer ring-shaped enclosure and other structures to enclose the entire area, and the structural design is more reasonable.

[0016] Beneficial effects: This utility model has the following beneficial effects:

[0017] 1) In this device, a tantalum liner is provided on the upper end face of the tube sheet body 1, and a tantalum tube is provided on the tantalum liner. The tube sheet body 1 is also provided with mounting holes. The tantalum tube is extended and installed in the mounting holes. The tantalum tube is then tightened and fixed by installing heat exchange tubes in the mounting holes, thereby fixing the tantalum liner as a whole. This can effectively improve the corrosion resistance and heat resistance at the connection between the tube sheet and the heat exchange tubes in the heat exchanger, and also improve the sealing performance. The overall structure is very reasonable, which effectively improves the safety and service life of the heat exchanger.

[0018] 2) In this device, the mounting holes are further designed as stepped holes, and the tantalum tubes are designed as stepped tubes accordingly. With this design, when the heat exchange tubes are installed in the mounting holes, the tantalum tubes can be expanded and compressed to stabilize them, thereby enhancing the sealing and stability.

[0019] 3) The device has three stepped mounting holes and two stepped tantalum tubes. When the tantalum tube is tightened, it can more thoroughly and stably tighten the tantalum tube inside the mounting hole. The structure is reasonably designed.

[0020] 4) In this device, a first threaded hole and a second threaded hole are provided at the edge of the tube sheet body 1 for installing and connecting external equipment, and an annular groove is installed on the inner side to install the side ring plate of the tube sheet body 1. The overall structure is reasonably designed. Attached Figure Description

[0021] Figure 1 This is a structural diagram of the present utility model;

[0022] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0023] Figure 3 This is an exploded view of the present invention;

[0024] Figure 4 for Figure 3 View from direction B;

[0025] Figure 5 This is a dimensional drawing of the present invention;

[0026] The tube sheet body 1, mounting hole 2, tantalum liner 3, tantalum tube 4, annular groove 5, first threaded hole 101, and second threaded hole 102 are included. Detailed Implementation

[0027] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments. These embodiments are implemented under the premise of the technical solution of the present invention. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0028] like Figure 1 , Figure 2 and Figure 3 As shown, a tantalum tube sheet for a shell-and-tube heat exchanger includes a tube sheet body 1 with a plurality of mounting holes 2 for installing heat exchange tubes. A tantalum liner 3 is provided on the upper end face of the tube sheet body 1, and a tantalum tube 4 corresponding to the position of the mounting hole 2 is also provided on the liner. The tantalum tube 4 is perpendicular to the tantalum liner 3, and the outer diameter of the tantalum tube 4 is adapted to the inner diameter of the mounting hole 2. The tantalum tube 4 extends into the mounting hole 2. When the heat exchange tube is installed in the mounting hole 2, the tantalum tube 4 and the tantalum liner 3 are pressed and fixed by the heat exchange tube.

[0029] The outer diameter of the tantalum liner 3 is smaller than the outer diameter of the tube sheet body 1, and the tantalum liner 3 does not cover the entire upper surface of the tube sheet body 1.

[0030] like Figure 5 As shown, the tube sheet body 1 is made of silicon carbide, and the outer diameter of the tube sheet body 1 is 360 mm and the thickness is 30 mm; the outer diameter of the tantalum liner 3 is 268 mm and the thickness is 0.5 mm.

[0031] Mounting hole 2 is set as a stepped hole, and the tantalum tube 4 extending into mounting hole 2 is set as a stepped tube structure.

[0032] Mounting hole 2 has three steps, and the inner diameter of the three stepped holes increases from top to bottom. Tantalum tube 4 has two steps, and extends from top to bottom to the second step of mounting hole 2, without covering the entire mounting hole 2.

[0033] like Figure 5As shown, the inner diameter of the first stepped hole of mounting hole 2 is set to 20mm and the height is set to 12mm; the inner diameter of the second stepped hole is set to 24mm and the height is set to 13mm; and the inner diameter of the third stepped hole is set to 26mm and the height is set to 5mm.

[0034] There are 24 mounting holes 2 on the tube sheet body 1, and the 24 mounting holes 2 are evenly distributed; and the distance between two adjacent mounting holes 2 is set to 32mm.

[0035] like Figure 4 As shown, 12 first threaded holes 101 and 12 second threaded holes 102 are also provided at the edge of the tube sheet body 1. The first threaded holes 101 and the second threaded holes 102 are located on the same circumference and are staggered. The inner diameter of the first threaded hole 101 is set to 26mm and the inner diameter of the second threaded hole is set to 16mm.

[0036] The lower end face of the tube sheet body 1 is also provided with a ring groove 5, the groove width of which is set to 31mm.

[0037] like Figure 1 As shown, the overall technical concept of this device is still to achieve the docking and installation of heat exchange tubes and tube sheet body 1 by setting a liner plate. However, the technical solution of this device has made certain improvements to the specific structure. In this device, the material of the tube sheet body 1 is first set to silicon carbide. Silicon carbide itself has the characteristics of high hardness, high temperature resistance, and resistance to strong acid and alkali corrosion, so it is very suitable for use as a tube sheet in a heat exchanger. Figure 1 and Figure 4 As shown, this device has 24 evenly distributed mounting holes 2 on the tube sheet body 1 for mounting the heat exchange tubes in the heat exchanger. The mating installation of the heat exchange tubes and the tube sheet body 1 is crucial for the heat exchanger, ensuring both airtightness and improving high-temperature and corrosion resistance. Existing technologies typically achieve sealing by placing gaskets or similar methods inside the mounting holes 2, but the effect is not ideal. In this device, a tantalum liner 3 is first installed on the upper surface of the tube sheet body 1. This tantalum liner 3 is not directly fixed to the upper surface of the tube sheet body 1; instead, a downward extending... The tantalum tube 4 extends into the tube sheet body 1, and its position corresponds to the position of the mounting hole 2. Therefore, the tantalum tube 4 can extend into the mounting hole 2. Here, it is necessary to set the outer diameter of the tantalum tube 4 to match the inner diameter of the mounting hole 2 so that the tantalum tube 4 can be smoothly inserted into the mounting hole 2. After this setting, the upper end face of the tube sheet body 1 is protected by the tantalum liner 3, and the mounting hole 2 is also protected by the tantalum tube 4. After the heat exchange tube is installed in the mounting hole 2, the tantalum tube 4 inside is tightened and fixed. The design of the tantalum liner 3 and the tantalum tube 4 can achieve good corrosion resistance and sealing effect.

[0038] However, the above structure still has some problems. If both the mounting hole 2 and the tantalum tube 4 are designed as straight-through structures, and then installed by tightening through the mounting hole 2, the overall installation structure still has some issues. The sealing and stability are not optimal. Over time, the tantalum tube 4 inside the mounting hole 2 may loosen, potentially causing sealing problems. Therefore, the technical solution of this device has further improved the design of the mounting hole 2 and the tantalum tube 4, such as... Figure 2 As shown, the mounting holes 2 on the tube sheet body 1 in this device are designed as stepped holes, and three stepped holes are specifically provided from top to bottom. Correspondingly, the tantalum tube 4 is also designed as a stepped tube body for installation. The inner diameters of the three stepped holes in this device are as follows: Figure 5 As shown, the inner diameter gradually increases from top to bottom, and the structure of the tantalum tube 4 is correspondingly designed. The stepped hole structure allows the heat exchange tube to have more and wider expansion space and expansion area during installation. From a directional perspective, the stepped hole structure can achieve expansion not only in the horizontal direction but also in the vertical direction, making the structure more reasonable and stable. Another prominent design feature of the above technical solution is that the extension length of the tantalum tube 4 in this device only extends to the position of the second stepped hole of the mounting hole 2, rather than completely covering the entire mounting hole 2. The stepped structure allows the mounting hole 2 to better expand and compact the internal tantalum tube 4 from below during installation, making the structure more stable and preventing the outer tantalum liner 3 from loosening, thus making the structure more reasonable.

[0039] In addition, the device also has a first threaded hole 101 and a second threaded hole 102 at the edge of the tube sheet body 1 for installing and connecting external equipment, such as screws and other locking components. The inner side is also equipped with an annular groove 5, which can be used to install the lateral annular plate of the tube sheet body 1. Thus, by using the two tube sheet bodies 1, heat exchange tubes are installed between the tube sheet bodies 1, and lateral annular plates are installed in the annular groove 5 on the outer side. Then, by installing the locking screws through the first threaded hole 101 and the second threaded hole 102 on the outside, a heat exchange device can be specifically formed. The overall structure is reasonably designed.

[0040] The above-described specific embodiments are merely preferred embodiments of this utility model and are not intended to limit the implementation of this utility model or the scope of the claims. All equivalent changes and modifications made in accordance with the scope of protection of this utility model patent application should be included within the scope of this utility model patent application.

Claims

1. A tantalum tube sheet for a shell-and-tube heat exchanger, characterized in that: The tube sheet body (1) is provided with a plurality of mounting holes (2) for installing heat exchange tubes. A tantalum liner (3) is provided on the upper end face of the tube sheet body (1), and a tantalum tube (4) corresponding to the position of the mounting hole (2) is also provided on the tantalum liner. The tantalum tube (4) is perpendicular to the tantalum liner (3), and the outer diameter of the tantalum tube (4) is adapted to the inner diameter of the mounting hole (2). The tantalum tube (4) extends into the mounting hole (2). When the heat exchange tube is installed in the mounting hole (2), the tantalum tube (4) and the tantalum liner (3) are pressed and fixed by the heat exchange tube. The mounting hole (2) is configured as a stepped hole, and the tantalum tube (4) extending into the mounting hole (2) is configured as a stepped tube structure.

2. The tantalum tube sheet for a shell-and-tube heat exchanger according to claim 1, characterized in that: The outer diameter of the tantalum liner (3) is smaller than the outer diameter of the tube sheet body (1), and the tantalum liner (3) does not cover the entire upper surface of the tube sheet body (1).

3. A tantalum tube sheet for a shell-and-tube heat exchanger according to claim 2, characterized in that: The tube sheet body (1) is made of silicon carbide, and the outer diameter of the tube sheet body (1) is 360 mm and the thickness is 30 mm; the outer diameter of the tantalum liner (3) is 268 mm and the thickness is 0.5 mm.

4. A tantalum tube sheet for a shell-and-tube heat exchanger according to claim 1, characterized in that: The mounting hole (2) is provided with three steps, and the inner diameter of the three stepped holes increases sequentially from top to bottom. The tantalum tube (4) is provided with two steps. The tantalum tube (4) extends from top to bottom to the second step position of the mounting hole (2) and does not cover the entire mounting hole (2).

5. A tantalum tube sheet for a shell-and-tube heat exchanger according to claim 4, characterized in that: The inner diameter of the first stepped hole of the mounting hole (2) is set to 20mm and the height is set to 12mm; the inner diameter of the second stepped hole is set to 24mm and the height is set to 13mm; the inner diameter of the third stepped hole is set to 26mm and the height is set to 5mm.

6. A tantalum tube sheet for a shell-and-tube heat exchanger according to claim 1, characterized in that: The tube sheet body (1) has a total of 24 mounting holes (2), and the 24 mounting holes (2) are evenly distributed; and the distance between two adjacent mounting holes (2) is set to 32mm.

7. A tantalum tube sheet for a shell-and-tube heat exchanger according to claim 1, characterized in that: The tube sheet body (1) is also provided with 12 first threaded holes (101) and 12 second threaded holes (102) at its edge. The first threaded holes (101) and the second threaded holes (102) are located on the same circumference and are staggered. The inner diameter of the first threaded hole (101) is set to 26 mm and the inner diameter of the second threaded hole is set to 16 mm.

8. A tantalum tube sheet for a shell-and-tube heat exchanger according to claim 1, characterized in that: The lower end face of the tube sheet body (1) is also provided with a ring groove (5), the groove width of which is set to 31mm.

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