Regeneration column reboiler

Abstract

The utility model relates to a regenerator reboiler, the regenerator reboiler includes: the tube bundle, the tube bundle includes the vertical setting cylinder, sets up the upper tube plate on the cylinder upper end and sets up the lower tube plate at the cylinder lower extreme, the cylinder side middle part sets up the hot side entrance, the first through -hole is passed and is established on the lower tube plate upper near the outer diameter department, the lower tube box is set up at the lower tube plate lower extreme, the lower tube box side upper end sets up the hot side export, the hot side export with the first through -hole are located the same side of the cylinder, the hot side export with the first through -hole between through the elbow pipe intercommunication, ensure that the inboard bottom of the pipeline of hot side export is the lowest of shell pass, ensure that the condensate of tube bundle bottom can all discharge through the hot side export, reduce the possibility of condensate residue, improve the life, guarantee the heat exchange effect.

Description

Technical Field

[0001] This utility model relates to the field of reboiler technology, and more particularly to a regeneration tower reboiler. Background Technology

[0002] Regeneration tower reboilers are key heat exchange equipment in the chemical, petrochemical, and coal chemical industries. They are mainly used to vaporize the liquid at the bottom of the tower through heating, thereby achieving the separation and purification of materials.

[0003] A reboiler typically comprises a vertically arranged tube bundle, an upper tube box at the top of the tube bundle, and a lower tube box at the bottom of the tube bundle. The tube bundle includes a cylindrical body with a hot-side inlet at the middle of its side and a hot-side outlet at the bottom of its side. Hot steam enters through the hot-side inlet, heats the material, and condenses into liquid water, which is then discharged through the hot-side outlet. However, because the pipe at the hot-side outlet itself has a thickness, the lower end of the inner wall of the pipe is difficult to align with the upper end of the lower tube sheet, resulting in water residue at the bottom of the cylindrical body. Over time, this can easily corrode and damage the equipment, and reduce heat exchange efficiency.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model discloses a regeneration tower reboiler to solve the problem that when the reboiler is set vertically, water residue remains at the bottom of the inner side of the tube bundle, which can easily corrode and damage the equipment with long-term use, resulting in reduced service life and decreased heat exchange efficiency.

[0006] The technical solution adopted in this utility model is as follows: A regeneration tower reboiler includes: a tube bundle comprising a vertically arranged cylinder, an upper tube sheet disposed at the upper end of the cylinder, and a lower tube sheet disposed at the lower end of the cylinder; a hot-side inlet is provided in the middle of the side of the cylinder, and a first through hole is provided through the lower tube sheet near its outer diameter; and a lower tube box disposed at the lower end of the lower tube sheet, with a hot-side outlet provided at the upper end of the side of the lower tube box. The hot-side outlet and the first through hole are located on the same side of the cylinder, and the hot-side outlet and the first through hole are connected by a bend in the tube.

[0007] A further technical solution is that the bend includes a baffle section and a baffle head; the baffle section is vertically arranged, and when viewed from above, the baffle section is arc-shaped, with both ends connected to the inner wall of the lower pipe box, and the first through hole is located between the baffle section and the inner wall of the cylinder; when viewed from the front, the baffle head is arc-shaped, with the right side higher than the left side, the upper end of the baffle head is connected to the lower end of the baffle section, the lower end of the baffle head is connected to the inner wall of the lower pipe box, the hot side outlet is located between the lower end of the baffle head and the upper end of the lower pipe box, and the lower end of the baffle head is flush with the lower inner end of the pipe of the hot side outlet.

[0008] A further technical solution is that the tube bundle further includes heat exchange tubes and a support plate; the two ends of the heat exchange tubes pass through and are fixedly connected to the upper tube sheet and the lower tube sheet respectively; the heat exchange tubes also pass through and are fixedly connected to the support plate, the support plate is located between the upper tube sheet and the lower tube sheet, the support plate has several pieces, which are spaced apart along the length direction of the heat exchange tubes, a second through hole is opened on the outer side of the support plate, the position of the second through hole corresponds to the first through hole, and the outer side of the support plate located opposite to the second through hole is spaced apart from the inner wall of the cylinder.

[0009] A further technical solution is to provide multiple rows of anti-impact bars between adjacent support plates near the hot side inlet.

[0010] A further technical solution is that the cylinder includes a first cylinder, an expansion joint, and a second cylinder connected sequentially from top to bottom, with the lower end of the second cylinder connected to the lower tube sheet and the upper end of the first cylinder connected to the upper tube sheet.

[0011] A further technical solution is that an upper tube box is provided at the upper end of the upper tube sheet, a process inlet is provided on the side of the lower tube box, and a process outlet is provided at the end of the upper tube box away from the upper tube sheet.

[0012] A further technical solution is that the upper pipe box is a shrimp-shaped bend pipe.

[0013] A further technical solution is that four ear seats are equally divided on the outer circumference of the cylinder.

[0014] A further technical solution is that four tube sheet vents are evenly distributed around the outer side of the upper tube sheet, and a shell-side vent is provided at the upper end of the side of the cylinder. Both the tube sheet vents and the shell-side vents are connected to the inner side of the cylinder.

[0015] A further technical solution is that a shell-side vent is provided on the side of the lower tube sheet, and the shell-side vent is connected to the upper end of the lower tube sheet.

[0016] The beneficial effects of this utility model embodiment are as follows: (i) The regeneration tower reboiler of this utility model opens a first through hole on the lower tube sheet of the tube bundle and sets the hot side outlet at the upper side of the lower tube box. The hot side outlet is then connected to the first through hole through a bend pipe located in the lower tube box, ensuring that the bottom of the inner side of the pipe of the hot side outlet is the lowest point of the shell side, ensuring that the condensate at the bottom of the tube bundle can be discharged through the hot side outlet, reducing the possibility of condensate residue, improving service life, and ensuring heat exchange effect.

[0017] (ii) Furthermore, four tube sheet vents are evenly spaced circumferentially on the outer side of the upper tube sheet, and a shell-side vent is provided at the upper end of the side of the shell. Both the tube sheet vents and the shell-side vents are connected to the inner side of the shell, and the tube sheet vents and shell-side vents discharge uncondensed hot steam. A shell-side vent is provided on the side of the lower tube sheet, and the shell-side vent is connected to the upper end of the lower tube sheet, and the shell-side vent discharges the residual condensate at the upper end of the lower tube sheet, further improving the venting effect. Attached Figure Description

[0018] Figure 1 This is a front view structural diagram of the regeneration tower reboiler of this utility model.

[0019] Figure 2 This is a top view of the lower tube sheet in the regeneration tower reboiler of this utility model.

[0020] Figure 3 This is a front view schematic diagram of the lower tube box in the regeneration tower reboiler of this utility model.

[0021] Figure 4 This is a top view of the support plate in the reboiler of the regeneration tower of this utility model.

[0022] Figure 5 This is a top view of the regeneration tower reboiler of this utility model.

[0023] Figure 6 This is a bottom view of the upper tube sheet structure in the regeneration tower reboiler of this utility model.

[0024] Figure 7 This is a schematic diagram of the structure of the channel connecting the shell-side vent in the upper tube sheet of the regeneration tower reboiler of this utility model.

[0025] In the picture: 1. Upper tube box; 11. Process outlet; 2. Tube bundle; 20. Shell; 201. First shell; 202. Second shell; 203. Expansion joint; 21. Upper tube sheet; 211. Tube sheet vent; 212. Shell-side vent; 213. Channel; 22. Heat exchange tube; 23. Lower tube sheet; 231. First through hole; 232. Shell-side vent; 24. Support plate; 241. Second through hole; 242. Anti-impact rod; 25. Lug; 26. Hot side inlet; 27. Hot side outlet; 28. Bend; 281. Baffle section; 282. Baffle head; 3. Lower tube box; 31. Process inlet. Detailed Implementation

[0026] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0027] Example: This embodiment discloses a regeneration tower reboiler.

[0028] The regeneration tower reboiler includes tube bundle 2 and lower tube box 3.

[0029] like Figure 1 and Figure 2 As shown, the tube bundle 2 includes a vertically arranged cylinder 20, an upper tube plate 21 disposed at the upper end of the cylinder 20, and a lower tube plate 23 disposed at the lower end of the cylinder 20. The cylinder 20 is a circular cylinder, and a hot-side inlet 26 is provided in the middle of the side of the cylinder 20 for the intake of heating steam. A first through hole 231 is provided on the lower tube plate 23 near its outer diameter. The lower tube box 3 is disposed at the lower end of the lower tube plate 23, and a hot-side outlet 27 is provided at the upper end of the side of the lower tube box 3. The hot-side outlet 27 and the first through hole 231 are located on the same side of the cylinder 20, and the hot-side outlet 27 and the first through hole 231 are connected by a bend 28.

[0030] like Figure 1 and Figure 3As shown, exemplarily, the centerline of the hot-side outlet 27 is located simultaneously on the diameter of the first through hole 231 and the diameter of the cylinder 20. The bend 28 includes a baffle section 281 and a baffle end cap 282. The baffle section 281 is vertically arranged, and when viewed from above, the baffle section 281 is arc-shaped, with both ends connected to the inner wall of the lower pipe box 3. The first through hole 231 is located between the baffle section 281 and the inner wall of the cylinder 20. Looking at the baffle head 282 from the front, the baffle head 282 is arc-shaped, with the right side higher than the left side. The upper end of the baffle head 282 is connected to the lower end of the baffle cylinder section 281, and the lower end of the baffle head 282 is connected to the inner wall of the lower tube box 3. The hot side outlet 27 is located between the lower end of the baffle head 282 and the upper end of the lower tube box 3. The lower end of the baffle head 282 is flush with the lower end of the inner side of the pipe of the hot side outlet 27, ensuring that the lower end of the inner side of the pipe of the hot side outlet 27 is the lowest point of the shell side.

[0031] like Figure 1 and Figure 4 As shown, the tube bundle 2 further includes heat exchange tubes 22 and a support plate 24. The heat exchange tubes 22 pass through and are fixedly connected to the upper tube sheet 21 and the lower tube sheet 23 at both ends, respectively. The heat exchange tubes 22 also pass through and are fixedly connected to the support plate 24, which is located between the upper tube sheet 21 and the lower tube sheet 23. The support plate 24 has several sections spaced apart along the length of the heat exchange tubes 22. A second through hole 241 is opened on the outer side of the support plate 24, corresponding to the position of the first through hole 231. The outer end of the support plate 24 opposite to the second through hole 241 is spaced from the inner wall of the cylinder 20. Condensate falls from the second through hole 241 and the spaced section to the bottom of the cylinder 20, ensuring uniform condensate distribution and maintaining stable reboiler operation.

[0032] like Figure 1 and Figure 4 As shown, furthermore, multiple rows of anti-impact rods 242 are provided between adjacent support plates 24 near the hot side inlet 26 to prevent the medium from directly impacting the heat exchange tube 22 and reduce the risk of vibration and corrosion.

[0033] like Figure 1 As shown, the cylinder 20 further includes a first cylinder 201, an expansion joint 203, and a second cylinder 202 connected sequentially from top to bottom. The lower end of the second cylinder 202 is connected to the lower tube sheet 23, and the upper end of the first cylinder 201 is connected to the upper tube sheet 21. Through the elastic deformation of the bellows in the expansion joint 203, the displacement of the cylinder 20 caused by temperature changes is absorbed, thus avoiding damage to the cylinder 20 due to thermal stress.

[0034] like Figure 1As shown, furthermore, an upper tube box 1 is provided at the upper end of the upper tube sheet 21, and a process inlet 31 is provided on the side of the lower tube box 3. A process outlet 11 is opened at the end of the upper tube box 1 away from the upper tube sheet 21. The two ends of the heat exchange tube 22 are respectively connected to the interior of the upper tube box 1 and the interior of the lower tube box 3. For example, the upper tube box 1 is a curved tube 28, which is spliced ​​and welded from various tube sections, and has a lower height compared to a one-piece curved tube 28. The heated solution enters the lower tube box from the process inlet 31, is heated by the heat exchange tube, vaporizes, enters the upper tube box 1, and is discharged from the process outlet 11.

[0035] like Figure 1 and Figure 5 As shown, four lugs 25 are evenly distributed around the outer circumference of the cylinder 20 to facilitate the vertical installation of the reboiler.

[0036] like Figure 1 and Figures 5-7 As shown, further, four tube sheet vents 211 are evenly distributed around the outer side of the upper tube sheet 21, and a shell-side vent 212 is provided at the upper end of the side of the cylinder 20. Both the tube sheet vents 211 and the shell-side vent 212 are connected to the inner side of the cylinder 20 through a channel 213, and the tube sheet vents 211 and the shell-side vent 212 discharge uncondensed hot steam.

[0037] like Figure 1 As shown, further, a shell-side vent 232 is provided on the side of the lower tube sheet 23. The shell-side vent 232 is connected to the upper end of the lower tube sheet 23, specifically, it is connected to the same channel 213 opened in the tube sheet vent 211. The shell-side vent 232 drains the condensate remaining at the upper end of the lower tube sheet 23.

[0038] In this embodiment, by opening a first through hole 231 on the lower tube sheet 23 of the tube bundle 2, the hot side outlet 27 is set at the upper side of the lower tube box 3. The hot side outlet 27 is then connected to the first through hole 231 through a bend 28 located in the lower tube box 3, ensuring that the bottom of the inner side of the hot side outlet 27 is the lowest point of the shell side, ensuring that the condensate at the bottom of the tube bundle 2 can be discharged through the hot side outlet 27, reducing the possibility of condensate residue, improving service life, and ensuring heat exchange effect.

[0039] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A regeneration tower reboiler, characterized in that, The regeneration tower reboiler includes: The tube bundle includes a vertically arranged cylinder, an upper tube sheet disposed at the upper end of the cylinder, and a lower tube sheet disposed at the lower end of the cylinder. A hot-side inlet is provided in the middle of the side of the cylinder, and a first through hole is provided on the lower tube sheet near the outer diameter. A lower tube box is disposed at the lower end of the lower tube sheet. A hot-side outlet is provided at the upper side of the lower tube box. The hot-side outlet and the first through hole are located on the same side of the cylinder. The hot-side outlet and the first through hole are connected by a bend.

2. The regeneration tower reboiler according to claim 1, characterized in that: The bend includes a baffle section and a baffle head. The baffle section is vertically arranged and, when viewed from above, is arc-shaped, with both ends connected to the inner wall of the lower pipe box. The first through hole is located between the baffle section and the inner wall of the cylinder. When viewed from the front, the baffle head is arc-shaped, with the right side higher than the left side. The upper end of the baffle head is connected to the lower end of the baffle section, and the lower end of the baffle head is connected to the inner wall of the lower pipe box. The hot-side outlet is located between the lower end of the baffle head and the upper end of the lower pipe box, and the lower end of the baffle head is flush with the lower inner end of the pipe of the hot-side outlet.

3. The regeneration tower reboiler according to claim 1, characterized in that: The tube bundle also includes heat exchange tubes and a support plate; the two ends of the heat exchange tubes pass through and are fixedly connected to the upper tube sheet and the lower tube sheet respectively; the heat exchange tubes also pass through and are fixedly connected to the support plate, the support plate is located between the upper tube sheet and the lower tube sheet, the support plate has several pieces, which are spaced apart along the length of the heat exchange tubes, a second through hole is opened on the outer side of the support plate, the position of the second through hole corresponds to the first through hole, and the outer side of the support plate is spaced apart from the inner wall of the cylinder at the end opposite to the second through hole.

4. The regeneration tower reboiler according to claim 3, characterized in that: Multiple rows of anti-impact bars are arranged between adjacent support plates near the hot side inlet.

5. The regeneration tower reboiler according to claim 1, characterized in that: The cylinder body includes a first cylinder body, an expansion joint, and a second cylinder body connected sequentially from top to bottom. The lower end of the second cylinder body is connected to the lower tube sheet, and the upper end of the first cylinder body is connected to the upper tube sheet.

6. The regeneration tower reboiler according to claim 1, characterized in that: An upper tube box is provided at the upper end of the upper tube sheet, a process inlet is provided on the side of the lower tube box, and a process outlet is provided at the end of the upper tube box away from the upper tube sheet.

7. The regeneration tower reboiler according to claim 6, characterized in that: The upper tube box is a shrimp-shaped curved tube.

8. The regeneration tower reboiler according to claim 1, characterized in that: Four ear seats are evenly distributed around the outer circumference of the cylinder.

9. The regeneration tower reboiler according to claim 1, characterized in that: Four tube sheet vents are evenly distributed around the outer side of the upper tube sheet, and a shell-side vent is provided at the upper end of the side of the cylinder. Both the tube sheet vents and the shell-side vents are connected to the inner side of the cylinder.

10. The regeneration tower reboiler according to claim 1, characterized in that: The lower tube sheet is provided with a shell-side vent on its side, and the shell-side vent is connected to the upper end of the lower tube sheet.

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