Detachable tube bundle structure for vertical evaporator

Abstract

The utility model discloses a detachable tube bundle structure for a vertical evaporator, which comprises a detachable fixed tube plate horizontally arranged at the upper end of an evaporator shell, and a horizontal floating tube plate arranged at the lower end in the evaporator shell and matched with the inner diameter of the evaporator shell, the side, close to the inner wall of the evaporator shell, of the lower surface of the floating tube plate is provided with an annular built-in stuffing box, the built-in stuffing box is located between the inner wall of the evaporator shell and the floating tube plate, a sealing device is further arranged in the built-in stuffing box, and a sealing fixing device is arranged at the position, corresponding to the built-in stuffing box, below the floating tube plate. A plurality of heat exchange tubes are fixedly connected between the floating tube plate and the fixed tube plate, and the upper ends and the lower ends of the heat exchange tubes penetrate through the fixed tube plate and the floating tube plate correspondingly. The utility model solves the problem that the heat exchange efficiency is influenced by a large amount of polymers deposited on the shell pass of the evaporator because the tube bundle in the vertical evaporator in the prior art cannot be disassembled and assembled and is difficult to clean.

Description

Technical Field

[0001] This utility model belongs to the field of evaporator technology and relates to a detachable tube bundle structure for vertical evaporators. Background Technology

[0002] In the petrochemical industry, vertical evaporators typically employ a fixed tube sheet structure, such as... Figure 1 As shown, the tube sheets at both ends of the evaporator are connected and fixed to the shell by welding, making it a non-removable structure. According to on-site investigations, this type of evaporator is prone to depositing large amounts of polymer on the shell side. Figure 2 As shown, this affects the heat exchange efficiency of the evaporator and makes it difficult to clean during maintenance. Utility Model Content

[0003] The purpose of this invention is to provide a detachable tube bundle structure for vertical evaporators, which solves the problem in the prior art that the tube bundles in vertical evaporators are not detachable and difficult to clean, resulting in a large amount of polymer deposits on the shell side of the evaporator, affecting its heat exchange efficiency.

[0004] The technical solution adopted by this utility model is a detachable tube bundle structure for a vertical evaporator, including a fixed tube plate that is detachable and horizontally arranged at the upper end of the evaporator shell, a floating tube plate that is adapted to the inner diameter of the evaporator shell and is horizontally arranged at the lower end of the evaporator shell, an annular internal stuffing box is opened on the lower surface of the floating tube plate near the inner wall of the evaporator shell, the internal stuffing box is located between the inner wall of the evaporator shell and the floating tube plate, and a sealing device is also provided in the internal stuffing box. A sealing and fixing device is provided below the floating tube plate at the position corresponding to the internal stuffing box. Multiple heat exchange tubes are fixedly connected between the floating tube plate and the fixed tube plate, and the upper and lower ends of the heat exchange tubes pass through the fixed tube plate and the floating tube plate respectively.

[0005] The present invention is further characterized in that:

[0006] The sealing device includes an O-ring at the bottom of the built-in stuffing box, and the stuffing box is filled with packing after the O-ring is installed.

[0007] The sealing and fixing device includes an annular clamping ring plate installed inside the evaporator shell at a position corresponding to the built-in stuffing box below the floating tube sheet. A clamping cover plate is fixedly connected below the clamping ring plate, and the clamping cover plate is fixedly connected to the floating tube sheet.

[0008] The pressure cover plate is fixedly connected to the floating tube plate by a fixing stud, and a nut is fixedly connected to the fixing stud by a thread.

[0009] The pressure cover plate is also equipped with pressure bolts, which pass through the pressure cover plate and abut against the pressure ring plate.

[0010] An equipment flange a is fixedly connected to the upper end of the evaporator shell, and an equipment flange b is also included. A fixed tube sheet is placed between the equipment flange a and the equipment flange b. The equipment flange a and the equipment flange b are fastened together by flange bolts to fix the fixed tube sheet.

[0011] A spiral wound gasket is provided at one end of the connection between the fixed tube sheet and equipment flanges a and b to achieve a seal between the fixed tube sheet and equipment flanges a and b.

[0012] An upper end cap of the evaporator shell is fixedly connected to the equipment flange b, and a lower end cap is connected to the lower end of the evaporator shell through the equipment flange c.

[0013] A shell-side inlet is located on the side wall of the evaporator shell below the fixed tube sheet, and a shell-side outlet is located on the side wall of the evaporator shell above the floating tube sheet.

[0014] The beneficial effects of this utility model are:

[0015] The heat exchange tube bundle in this vertical evaporator is detachable, making it easy to clean the tube bundle and shell side. Under conditions of large temperature difference between the tube and shell side, the floating tube sheet seal is a non-rigid constraint, thus having a certain degree of axial mobility, thereby weakening and releasing the thermal expansion caused by the temperature difference and avoiding local thermal stress concentration at the edge of the tube sheet.

[0016] This invention facilitates the overall disassembly and cleaning of the tube bundle and the shell side, while also ensuring a seal between the shell side and the tube side. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a vertical evaporator in the existing technology;

[0018] Figure 2 This is a schematic diagram of a large amount of polymer deposited in the shell side of a vertical evaporator in the prior art;

[0019] Figure 3 This is a schematic diagram of the detachable tube bundle structure of this utility model for a vertical evaporator;

[0020] Figure 4 This is a structural diagram of the floating tube plate, sealing device, and sealing fixing device in the detachable tube bundle structure of the vertical evaporator of this utility model;

[0021] Figure 5 This is a schematic diagram of the installation of the spiral wound gasket in the detachable tube bundle structure of a vertical evaporator according to this utility model;

[0022] Figure 6 This is a schematic diagram of the built-in stuffing gland in the detachable tube bundle structure of the present invention for a vertical evaporator.

[0023] In the diagram: 1. Fixed tube sheet, 2. Heat exchange tube, 3. Floating tube sheet, 4. O-ring seal, 5. Internal stuffing box, 6. Compression ring plate, 7. Compression cover plate, 8. Fixed stud, 9. Washer, 10. Compression bolt, 11. Nut, 12. Evaporator shell, 13. Equipment flange a, 14. Equipment flange b, 15. Shell side inlet, 16. Shell side outlet, 17. Equipment flange c, 18. Spiral wound gasket. Detailed Implementation

[0024] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0025] Example 1

[0026] A detachable tube bundle structure for vertical evaporators, its structure is as follows: Figure 3 As shown, the evaporator includes a fixed tube sheet 1 that is detachable and horizontally arranged at the upper end of the evaporator housing 12, and a floating tube sheet 3 that is adapted to the inner diameter of the evaporator housing 12 and is horizontally arranged at the lower end of the evaporator housing 12. Figure 6 As shown, an annular notch is provided on the lower surface of the floating tube plate 3 near the inner wall of the evaporator shell 12 as an internal stuffing box 5. The internal stuffing box 5 is located between the inner wall of the evaporator shell 12 and the floating tube plate 3. A sealing device is also provided inside the internal stuffing box 5. A sealing and fixing device is provided below the floating tube plate 3 at the position corresponding to the internal stuffing box 5. Multiple heat exchange tubes are fixedly connected between the floating tube plate 3 and the fixed tube plate 1, and the upper and lower ends of the heat exchange tubes pass through the fixed tube plate 1 and the floating tube plate 3, respectively.

[0027] The working principle of this embodiment is as follows:

[0028] During installation, the fixed tube sheet 1, heat exchange tubes, and floating tube sheet 3 are placed into the evaporator shell 12 as a whole from top to bottom. Then, the fixed tube sheet 1 is fixed, and the sealing device and sealing fixing device are installed. When it is necessary to clean the tube bundle and shell side, the sealing fixing device, sealing device, and fixed tube sheet 1 are removed in sequence. Then, the fixed tube sheet 1, heat exchange tubes, and floating tube sheet 3 are taken out from the evaporator shell 12 as a whole for cleaning of the tube bundle and shell side.

[0029] Example 2

[0030] A detachable tube bundle structure for vertical evaporators, its structure is as follows: Figure 3As shown, the device includes a fixed tube sheet 1 that is detachable and horizontally arranged on the upper end of the evaporator shell 12, and a floating tube sheet 3 that is adapted to the inner diameter of the evaporator shell 12 and is horizontally arranged at the lower end of the evaporator shell 12. An annular internal stuffing box 5 is provided on the lower surface of the floating tube sheet 3 near the inner wall of the evaporator shell 12. The internal stuffing box 5 is located between the inner wall of the evaporator shell 12 and the floating tube sheet 3. A sealing device is also provided inside the internal stuffing box 5. A sealing and fixing device is provided below the floating tube sheet 3 at the position corresponding to the internal stuffing box 5. Multiple heat exchange tubes are fixedly connected between the floating tube sheet 3 and the fixed tube sheet 1, and the upper and lower ends of the heat exchange tubes pass through the fixed tube sheet 1 and the floating tube sheet 3, respectively.

[0031] like Figure 4 As shown, the sealing device includes an O-ring 4 disposed at the bottom inside the built-in stuffing box 5, and after the O-ring 4 is installed, the built-in stuffing box 5 is filled with packing.

[0032] The working principle of this embodiment is as follows:

[0033] During installation, the fixed tube sheet 1, heat exchange tubes, and floating tube sheet 3 are placed into the evaporator shell 12 as a whole from top to bottom. Then, the fixed tube sheet 1 is fixed, and the sealing device and sealing fixing device are installed. When it is necessary to clean the tube bundle and shell side, the sealing fixing device, sealing device, and fixed tube sheet 1 are removed in sequence. Then, the fixed tube sheet 1, heat exchange tubes, and floating tube sheet 3 are taken out from the evaporator shell 12 as a whole for cleaning of the tube bundle and shell side.

[0034] O-rings and packing are used for sealing to isolate the shell-side and tube-side media.

[0035] Example 3

[0036] A detachable tube bundle structure for vertical evaporators, its structure is as follows: Figure 3 As shown, the device includes a fixed tube sheet 1 that is detachable and horizontally arranged on the upper end of the evaporator shell 12, and a floating tube sheet 3 that is adapted to the inner diameter of the evaporator shell 12 and is horizontally arranged at the lower end of the evaporator shell 12. An annular internal stuffing box 5 is provided on the lower surface of the floating tube sheet 3 near the inner wall of the evaporator shell 12. The internal stuffing box 5 is located between the inner wall of the evaporator shell 12 and the floating tube sheet 3. A sealing device is also provided inside the internal stuffing box 5. A sealing and fixing device is provided below the floating tube sheet 3 at the position corresponding to the internal stuffing box 5. Multiple heat exchange tubes are fixedly connected between the floating tube sheet 3 and the fixed tube sheet 1, and the upper and lower ends of the heat exchange tubes pass through the fixed tube sheet 1 and the floating tube sheet 3, respectively.

[0037] like Figure 4 As shown, the sealing device includes an O-ring 4 disposed at the bottom inside the built-in stuffing box 5, and after the O-ring 4 is installed, the built-in stuffing box 5 is filled with packing.

[0038] like Figure 4 As shown, the sealing and fixing device includes an annular compression ring plate 6 located inside the evaporator shell 12 at a position corresponding to the built-in stuffing box 5 below the floating tube plate 3. A compression cover plate 7 is fixedly connected below the compression ring plate 6, and the compression cover plate 7 is fixedly connected to the floating tube plate 3.

[0039] The working principle of this embodiment is as follows:

[0040] During installation, the fixed tube sheet 1, heat exchange tubes, and floating tube sheet 3 are placed into the evaporator shell 12 as a whole from top to bottom. Then, the fixed tube sheet 1 is fixed, and the sealing device and sealing fixing device are installed. When it is necessary to clean the tube bundle and shell side, the sealing fixing device, sealing device, and fixed tube sheet 1 are removed in sequence. Then, the fixed tube sheet 1, heat exchange tubes, and floating tube sheet 3 are taken out from the evaporator shell 12 as a whole for cleaning of the tube bundle and shell side.

[0041] O-rings and packing are used for sealing to isolate the shell-side and tube-side media.

[0042] The sealing device is pressed by the pressing cover plate 7 and the pressing ring plate 6, and the seal fails during use.

[0043] During installation, first install the O-ring 4 at the bottom of the built-in stuffing box 5, then fill the built-in stuffing box 5 with filler, and then use the clamping cover plate 7 and clamping ring plate 6 to clamp it.

[0044] During disassembly, first remove the clamping cover plate 7 and clamping ring plate 6, then remove the packing and O-ring seal 4. This will not damage the sealing device and it can be reused.

[0045] Example 4

[0046] A detachable tube bundle structure for vertical evaporators, its structure is as follows: Figure 3 As shown, the device includes a fixed tube sheet 1 that is detachable and horizontally arranged on the upper end of the evaporator shell 12, and a floating tube sheet 3 that is adapted to the inner diameter of the evaporator shell 12 and is horizontally arranged at the lower end of the evaporator shell 12. An annular internal stuffing box 5 is provided on the lower surface of the floating tube sheet 3 near the inner wall of the evaporator shell 12. The internal stuffing box 5 is located between the inner wall of the evaporator shell 12 and the floating tube sheet 3. A sealing device is also provided inside the internal stuffing box 5. A sealing and fixing device is provided below the floating tube sheet 3 at the position corresponding to the internal stuffing box 5. Multiple heat exchange tubes are fixedly connected between the floating tube sheet 3 and the fixed tube sheet 1, and the upper and lower ends of the heat exchange tubes pass through the fixed tube sheet 1 and the floating tube sheet 3, respectively.

[0047] like Figure 4 As shown, the sealing device includes an O-ring 4 disposed at the bottom inside the built-in stuffing box 5, and after the O-ring 4 is installed, the built-in stuffing box 5 is filled with packing.

[0048] like Figure 4 As shown, the sealing and fixing device includes an annular compression ring plate 6 located inside the evaporator shell 12 at a position corresponding to the built-in stuffing box 5 below the floating tube plate 3. A compression cover plate 7 is fixedly connected below the compression ring plate 6, and the compression cover plate 7 is fixedly connected to the floating tube plate 3.

[0049] The clamping cover plate 7 is fixedly connected to the floating tube plate 3 by the fixing stud 8, and the fixing stud 8 is fixedly connected to the nut 11 by thread.

[0050] The clamping cover plate 7 is also provided with clamping bolts 10, which pass through the clamping cover plate 7 and abut against the clamping ring plate 6.

[0051] The working principle of this embodiment is as follows:

[0052] During installation, the fixed tube sheet 1, heat exchange tubes, and floating tube sheet 3 are placed into the evaporator shell 12 as a whole from top to bottom. Then, the fixed tube sheet 1 is fixed, and the sealing device and sealing fixing device are installed. When it is necessary to clean the tube bundle and shell side, the sealing fixing device, sealing device, and fixed tube sheet 1 are removed in sequence. Then, the fixed tube sheet 1, heat exchange tubes, and floating tube sheet 3 are taken out from the evaporator shell 12 as a whole for cleaning of the tube bundle and shell side.

[0053] O-rings and packing are used for sealing to isolate the shell-side and tube-side media.

[0054] The sealing device is pressed by the pressing cover plate 7 and the pressing ring plate 6, and the seal fails during use.

[0055] During installation, first install the O-ring 4 at the bottom of the built-in stuffing box 5, then fill the built-in stuffing box 5 with filler, and then use the clamping cover plate 7 and clamping ring plate 6 to clamp it.

[0056] During disassembly, first remove the clamping cover plate 7 and clamping ring plate 6, then remove the packing and O-ring seal 4. This will not damage the sealing device and it can be reused.

[0057] In this embodiment, the clamping cover plate 7 and the clamping ring plate 6 are fixed by the fixing stud 8 and the clamping bolt 10, which facilitates disassembly during cleaning and maintenance.

[0058] Example 5

[0059] A detachable tube bundle structure for vertical evaporators, its structure is as follows: Figure 3As shown, the device includes a fixed tube sheet 1 that is detachable and horizontally arranged on the upper end of the evaporator shell 12, and a floating tube sheet 3 that is adapted to the inner diameter of the evaporator shell 12 and is horizontally arranged at the lower end of the evaporator shell 12. An annular internal stuffing box 5 is provided on the lower surface of the floating tube sheet 3 near the inner wall of the evaporator shell 12. The internal stuffing box 5 is located between the inner wall of the evaporator shell 12 and the floating tube sheet 3. A sealing device is also provided inside the internal stuffing box 5. A sealing and fixing device is provided below the floating tube sheet 3 at the position corresponding to the internal stuffing box 5. Multiple heat exchange tubes are fixedly connected between the floating tube sheet 3 and the fixed tube sheet 1, and the upper and lower ends of the heat exchange tubes pass through the fixed tube sheet 1 and the floating tube sheet 3, respectively.

[0060] like Figure 4 As shown, the sealing device includes an O-ring 4 disposed at the bottom inside the built-in stuffing box 5, and after the O-ring 4 is installed, the built-in stuffing box 5 is filled with packing.

[0061] like Figure 4 As shown, the sealing and fixing device includes an annular compression ring plate 6 located inside the evaporator shell 12 at a position corresponding to the built-in stuffing box 5 below the floating tube plate 3. A compression cover plate 7 is fixedly connected below the compression ring plate 6, and the compression cover plate 7 is fixedly connected to the floating tube plate 3.

[0062] The clamping cover plate 7 is fixedly connected to the floating tube plate 3 by the fixing stud 8, and the fixing stud 8 is fixedly connected to the nut 11 by thread.

[0063] The clamping cover plate 7 is also provided with clamping bolts 10, which pass through the clamping cover plate 7 and abut against the clamping ring plate 6.

[0064] An equipment flange a13 is fixedly connected to the upper end of the evaporator shell 12, and an equipment flange b14 is also included. A fixed tube sheet 1 is placed between the equipment flange a13 and the equipment flange b14. The equipment flange a13 and the equipment flange b14 are fastened together by flange bolts to fix the fixed tube sheet 1.

[0065] The working principle of this embodiment is as follows:

[0066] During installation, the fixed tube sheet 1, heat exchange tubes, and floating tube sheet 3 are placed into the evaporator shell 12 as a whole from top to bottom. Then, the fixed tube sheet 1 is fixed, and the sealing device and sealing fixing device are installed. When it is necessary to clean the tube bundle and shell side, the sealing fixing device, sealing device, and fixed tube sheet 1 are removed in sequence. Then, the fixed tube sheet 1, heat exchange tubes, and floating tube sheet 3 are taken out from the evaporator shell 12 as a whole for cleaning of the tube bundle and shell side.

[0067] O-rings and packing are used for sealing to isolate the shell-side and tube-side media.

[0068] The sealing device is pressed by the pressing cover plate 7 and the pressing ring plate 6, and the seal fails during use.

[0069] During installation, first install the O-ring 4 at the bottom of the built-in stuffing box 5, then fill the built-in stuffing box 5 with filler, and then use the clamping cover plate 7 and clamping ring plate 6 to clamp it.

[0070] During disassembly, first remove the clamping cover plate 7 and clamping ring plate 6, then remove the packing and O-ring seal 4. This will not damage the sealing device and it can be reused.

[0071] In this embodiment, the clamping cover plate 7 and the clamping ring plate 6 are fixed by the fixing stud 8 and the clamping bolt 10, which facilitates disassembly during cleaning and maintenance.

[0072] In this embodiment, the tube sheet 1 is installed using a device flange, which facilitates disassembly.

[0073] Example 6

[0074] A detachable tube bundle structure for vertical evaporators, its structure is as follows: Figure 3 As shown, the device includes a fixed tube sheet 1 that is detachable and horizontally arranged on the upper end of the evaporator shell 12, and a floating tube sheet 3 that is adapted to the inner diameter of the evaporator shell 12 and is horizontally arranged at the lower end of the evaporator shell 12. An annular internal stuffing box 5 is provided on the lower surface of the floating tube sheet 3 near the inner wall of the evaporator shell 12. The internal stuffing box 5 is located between the inner wall of the evaporator shell 12 and the floating tube sheet 3. A sealing device is also provided inside the internal stuffing box 5. A sealing and fixing device is provided below the floating tube sheet 3 at the position corresponding to the internal stuffing box 5. Multiple heat exchange tubes are fixedly connected between the floating tube sheet 3 and the fixed tube sheet 1, and the upper and lower ends of the heat exchange tubes pass through the fixed tube sheet 1 and the floating tube sheet 3, respectively.

[0075] like Figure 4 As shown, the sealing device includes an O-ring 4 disposed at the bottom inside the built-in stuffing box 5, and after the O-ring 4 is installed, the built-in stuffing box 5 is filled with packing.

[0076] like Figure 4 As shown, the sealing and fixing device includes an annular compression ring plate 6 located inside the evaporator shell 12 at a position corresponding to the built-in stuffing box 5 below the floating tube plate 3. A compression cover plate 7 is fixedly connected below the compression ring plate 6, and the compression cover plate 7 is fixedly connected to the floating tube plate 3.

[0077] The clamping cover plate 7 is fixedly connected to the floating tube plate 3 by the fixing stud 8, and the fixing stud 8 is fixedly connected to the nut 11 by thread.

[0078] The clamping cover plate 7 is also provided with clamping bolts 10, which pass through the clamping cover plate 7 and abut against the clamping ring plate 6.

[0079] An equipment flange a13 is fixedly connected to the upper end of the evaporator shell 12, and an equipment flange b14 is also included. A fixed tube sheet 1 is placed between the equipment flange a13 and the equipment flange b14. The equipment flange a13 and the equipment flange b14 are fastened together by flange bolts to fix the fixed tube sheet 1.

[0080] like Figure 5 As shown, a spiral wound gasket 18 is provided at one end of the connection between the fixed tube sheet 1 and the equipment flanges a13 and b14 to achieve a seal between the fixed tube sheet 1 and the equipment flanges a13 and b14.

[0081] The working principle of this embodiment is as follows:

[0082] During installation, the fixed tube sheet 1, heat exchange tubes, and floating tube sheet 3 are placed into the evaporator shell 12 as a whole from top to bottom. Then, the fixed tube sheet 1 is fixed, and the sealing device and sealing fixing device are installed. When it is necessary to clean the tube bundle and shell side, the sealing fixing device, sealing device, and fixed tube sheet 1 are removed in sequence. Then, the fixed tube sheet 1, heat exchange tubes, and floating tube sheet 3 are taken out from the evaporator shell 12 as a whole for cleaning of the tube bundle and shell side.

[0083] O-rings and packing are used for sealing to isolate the shell-side and tube-side media.

[0084] The sealing device is pressed by the pressing cover plate 7 and the pressing ring plate 6, and the seal fails during use.

[0085] During installation, first install the O-ring 4 at the bottom of the built-in stuffing box 5, then fill the built-in stuffing box 5 with filler, and then use the clamping cover plate 7 and clamping ring plate 6 to clamp it.

[0086] During disassembly, first remove the clamping cover plate 7 and clamping ring plate 6, then remove the packing and O-ring seal 4. This will not damage the sealing device and it can be reused.

[0087] In this embodiment, the clamping cover plate 7 and the clamping ring plate 6 are fixed by the fixing stud 8 and the clamping bolt 10, which facilitates disassembly during cleaning and maintenance.

[0088] In this embodiment, the tube sheet 1 is installed using a device flange, which facilitates disassembly.

[0089] This implementation achieves a seal between the fixed tube sheet 1 and the equipment flange by using a spiral wound gasket 18.

[0090] Example 7

[0091] Based on Example 6, an upper end cap of the evaporator shell is fixedly connected to the equipment flange b14, and a lower end cap is connected to the lower end of the evaporator shell 12 through the equipment flange c17.

[0092] A shell-side inlet 15 is provided on the side wall of the evaporator shell 12 at a position below the fixed tube sheet 1, and a shell-side outlet 16 is provided on the side wall of the evaporator shell 12 at a position above the floating tube sheet 3.

Claims

1. A removable tube bundle structure for a vertical evaporator, characterized by, The utility model provides an evaporator shell (12) upper end detachable and horizontal fixed tube plate (1), evaporator shell (12) inside lower end is provided with with evaporator shell (12) inner diameter is appropriate and horizontal floating tube plate (3), floating tube plate (3) lower surface is close to the side of evaporator shell (12) inner wall and is opened the annular built -in filler (5), built -in filler (5) is located between evaporator shell (12) inner wall and floating tube plate (3), still be provided with sealing device in built -in filler (5), floating tube plate (3) lower portion corresponds built -in filler (5) and is provided with sealing fixed device, floating tube plate (3) and fixed tube plate (1) between fixed connection has a plurality of heat exchange pipes, and the upper and lower ends of heat exchange pipe respectively pass fixed tube plate (1) and floating tube plate (3).

2. The removable tube bundle structure for a vertical evaporator of claim 1, wherein, The sealing device comprises an O-shaped sealing ring (4) arranged at the bottom of the built-in filler (5), and the built-in filler (5) is filled with filler after the O-shaped sealing ring (4) is installed.

3. The removable tube bundle structure for a vertical evaporator of claim 2, wherein, The sealing fixed device comprises a compression ring plate (6) arranged in the position corresponding to the built-in filler (5) below the floating tube plate (3) in the evaporator shell (12), a compression cover plate (7) fixedly connected below the compression ring plate (6), and the compression cover plate (7) is fixedly connected to the floating tube plate (3).

4. The removable tube bundle structure for a vertical evaporator of claim 3, wherein, The compression cover plate (7) is fixedly connected to the floating tube plate (3) through a fixing stud (8), and a nut (11) is fixedly connected to the fixing stud (8) through threads.

5. The removable tube bundle structure for a vertical evaporator of claim 4, wherein, The compression cover plate (7) is further provided with a compression bolt (10), and the compression bolt (10) passes through the compression cover plate (7) and abuts against the compression ring plate (6).

6. The removable tube bundle structure for a vertical evaporator of claim 1, wherein, An equipment flange a (13) is fixedly connected to the upper end of the evaporator shell (12), and an equipment flange b (14) is further included, the fixed tube plate (1) is arranged between the equipment flange a (13) and the equipment flange b (14), and the equipment flange a (13) and the equipment flange b (14) are fastened and connected through flange bolts to fix the fixed tube plate (1).

7. The removable tube bundle structure for a vertical evaporator of claim 6, wherein, One end of the fixed tube plate (1) and the equipment flange a (13) and the equipment flange b (14) is provided with a winding gasket (18) for sealing between the fixed tube plate (1) and the equipment flange a (13) and the equipment flange b (14).

8. The removable tube bundle structure for a vertical evaporator of claim 7, wherein, An evaporator shell upper head is fixedly connected to the equipment flange b (14), and a lower head is connected to the lower end of the evaporator shell (12) through an equipment flange c (17).

9. The removable tube bundle structure for a vertical evaporator of claim 1, wherein, A shell side inlet (15) is arranged at the position corresponding to the lower side of the fixed tube plate (1) on the side wall of the evaporator shell (12), and a shell side outlet (16) is arranged at the position corresponding to the upper side of the floating tube plate (3) on the side wall of the evaporator shell (12).

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