Rectifying tower tube shell reboiler

Abstract

The utility model discloses a rectifying tower tube shell reboiler which comprises a tank body, the top end of the tank body is fixedly connected with a discharging tube, the circumferential face of the tank body is fixedly connected with a first steam tube and a second steam tube, the bottom end of the tank body is fixedly connected with a feeding tube, and inner rings of the upper portion and the lower portion of the tank body are fixedly connected with tube plates respectively. The two tube plates are both provided with symmetrical evaporation holes, an evaporation tube is connected between the two tube plates through the symmetrical evaporation holes, the upper circumferential surface of the evaporation tube is fixedly connected with a flow dividing tube, and the top end of the flow dividing tube is fixedly connected with an annular tube. In the cleaning process, through the flushing structure, the cleaning medium can be sprayed to the interiors of the evaporation pipes through the flow dividing pipes and can make more comprehensive contact with the inner surfaces of the evaporation pipes, so that the cleaning medium fully dissolves residual substances on the surfaces of the evaporation pipes, and the cleaning purpose is achieved.

Description

Technical Field

[0001] This utility model relates to the field of distillation column technology, specifically to a distillation column shell and tube reboiler. Background Technology

[0002] A distillation column is an important piece of equipment used in petrochemical, pharmaceutical, and chemical industries. It is primarily used for the separation and purification of liquid mixtures. Its working principle utilizes the differences in volatility of different components in the mixture, achieving gas-liquid mass and heat transfer through multiple countercurrent contacts, thereby separating high-purity products. A reboiler (also called a re-boiling vessel) is a device used for the re-vaporization of liquids, mainly applied in distillation processes in the chemical, petrochemical, and alcohol industries. The working principle of a reboiler is to heat the liquid to partially vaporize it and re-enter the fractionation column, providing the gas-phase reflux required for mass transfer within the column.

[0003] A search revealed application number "202021587258.3," which discloses a novel falling film reboiler for benzyl chloride distillation. After entering the reboiler, the material is distributed by a distribution plate, falls onto a separating plate, and then flows into the tubes through perforations on the separating plate. The separating cap acts as a buffer and collects some material. This prevents insufficient heat exchange due to excessive material in certain areas. The material can also be collected by the separating cap and flow out through guide holes, then flow downwards and towards the inner wall of the tubes after passing through a skirt-shaped guide shroud, slowing the flow rate. The guide shroud facilitates a secondary downward flow of the material towards the tube wall after buffering, preventing large amounts of material from flowing directly out of the tubes, significantly improving the liquid film heat transfer efficiency and enhancing the overall performance.

[0004] The above method uses multiple tubes to disperse the liquid in the reboiler, ensuring uniform material distribution. However, as the liquid flows through multiple tubes, impurities in the liquid easily adhere to the inner walls of the tubes. Over time, this accumulation can clog the tubes, requiring staff to disassemble each tube individually for cleaning. This is cumbersome and increases the workload for the staff. Utility Model Content

[0005] The purpose of this invention is to provide a reboiler for a distillation column. During the cleaning process, the cleaning medium can be sprayed into the interior of each evaporation tube through the flushing structure, allowing for more comprehensive contact with the inner surface of the evaporation tube. This enables the cleaning medium to fully dissolve the residual substances on the surface of the evaporation tube, achieving the cleaning purpose and effectively removing impurities, dirt, and residual materials attached to these components, thereby improving cleaning efficiency.

[0006] To achieve the above objectives, a shell-and-tube reboiler for a distillation column is provided, comprising: a tank body; a discharge pipe fixedly connected to the top of the tank body; a first steam pipe and a second steam pipe fixedly connected to the circumferential surface of the tank body; a feed pipe fixedly connected to the bottom of the tank body; tube blocks fixedly connected to the upper and lower inner rings of the tank body; evaporation holes symmetrically opened on both tube blocks; an evaporation tube fixedly connected between the two tube blocks through the symmetrical evaporation holes; a distribution pipe fixedly connected to the upper circumferential surface of the evaporation tube; and an annular pipe fixedly connected to the top of the distribution pipe. The distribution pipe ensures more thorough and uniform flow within the tube block.

[0007] According to the aforementioned shell-and-tube reboiler for a distillation column, a first cleaning medium tube is fixedly connected to the circumferential surface of the annular tube, a pressure column is fixedly connected to the top end of the first cleaning medium tube, and a connecting pipe is fixedly connected to the top end of the pressure column. The connecting pipe effectively connects the cleaning medium from the outside to the inside of the equipment.

[0008] According to the aforementioned shell-and-tube reboiler for a distillation column, a second rotating column is rotatably connected to the top of the pressurizing column, and the second rotating column extends into the interior of the pressurizing column. A second pulley is fixedly connected to the circumferential surface of the second rotating column. The design of the second rotating column and the second pulley facilitates the adjustment of pipeline connections and the transmission of power, ensuring the flexibility of system operation.

[0009] According to the aforementioned shell-and-tube reboiler for a distillation column, a belt is rolledly connected to the circumferential surface of the second pulley, a flap is fixedly connected to the circumferential surface of the second rotating column, and a compression box is fixedly connected to one end of the connecting pipe. The belt transmits power, the flap regulates the flow of the cleaning medium, and the compression box provides space for the cleaning medium, thereby improving the cleaning effect.

[0010] According to the aforementioned shell-and-tube reboiler for a distillation column, a second cleaning medium pipe is fixedly connected to the left side of the compression tank, and a one-way valve is fixedly connected to the left side of the second cleaning medium pipe. A compression plate is slidably connected inside the compression tank, and a piston rod is fixedly connected to the right side of the compression plate, with the piston rod slidably connected to the right side of the compression tank. The one-way valve ensures that the cleaning medium flows into the compression tank in one direction only.

[0011] According to the aforementioned shell-and-tube reboiler for a distillation column, a first fixed column is fixedly connected to the circumferential surface of the piston column. A rotating rod is rotatably connected to the top of the first fixed column. Second fixed columns are rotatably connected to both the upper and lower sides of the rotating rod. A limit column is fixedly connected to the top of the second fixed column. A fixed plate is fixedly connected to the bottom of the compression chamber. The fixed columns, rotating rod, and limit columns ensure stable movement of the piston column, and the fixed plate provides stable support for the compression chamber.

[0012] According to the aforementioned reboiler for a distillation column, a motor is fixedly connected to the bottom end of the fixed plate, and a first rotating column is fixedly connected to the output end of the motor, extending to the top end of the fixed plate. A first pulley is fixedly connected to the circumferential surface of the first rotating column, and the circumferential surface of the first pulley is in rolling contact with a belt. A deflector block is fixedly connected to the top end of the first rotating column, and the top end of the deflector block is fixedly connected to the bottom end of the second fixed column. The motor provides power, the first rotating column and the first pulley cooperate to drive the system, and the deflector block changes the direction of the medium flow, making the system operate more smoothly.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This utility model is equipped with a tube plate, evaporation holes, evaporation tubes, a distribution pipe, and an annular pipe. During the cleaning process, through the flushing structure, a suitable cleaning medium can be sprayed into the interior of each evaporation tube through the distribution pipe, which can more comprehensively contact the inner surface of the evaporation tube, thereby allowing the flushing medium to fully dissolve the residual substances on the surface of the evaporation tube, thus improving the cleaning efficiency.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0017] Figure 1 This is a perspective view of a distillation column shell-and-tube reboiler according to the present invention;

[0018] Figure 2 This is a front view of a distillation column shell-and-tube reboiler according to the present invention;

[0019] Figure 3 This is a cross-sectional perspective view of a distillation column shell-and-tube reboiler according to the present invention;

[0020] Figure 4 This utility model Figure 3 Enlarged view of the structure at point A in the middle;

[0021] Figure 5 This utility model Figure 3 Enlarged view of the structure at point B in the middle;

[0022] Figure 6 This utility model Figure 3 Enlarged view of the structure at point C.

[0023] In the diagram: 1. Tank body; 2. Discharge pipe; 3. First steam pipe; 4. Feed pipe; 5. First cleaning medium pipe; 6. Motor; 7. Fixing plate; 8. Annular pipe; 9. Diverter pipe; 10. Tube sheet; 11. Evaporation hole; 12. Evaporation pipe; 13. Compression box; 14. Second cleaning medium pipe; 15. Compression plate; 16. Piston column; 17. Connecting pipe; 18. First fixing column; 19. Rotating rod; 20. Second fixing column; 21. Limiting column; 22. Deflector block; 23. First rotating column; 24. First pulley; 25. Belt; 26. Second pulley; 27. Second rotating column; 28. Pressurizing column; 29. ​​Rotating blade; 30. Second steam pipe; 31. Check valve. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figures 1-6This utility model provides a technical solution: a shell-and-tube reboiler for a distillation column, comprising: a tank body 1, a feed pipe 4 fixedly connected to the bottom end of the tank body 1 for feeding raw materials into the tank body 1 for processing; a second steam pipe 30 and a first steam pipe 3 fixedly connected to the circumferential surface of the tank body 1 for the entry and exit of heating steam to provide heat for the evaporation of the raw materials; a discharge pipe 2 fixedly connected to the top end of the tank body 1 for the evaporated raw materials to flow out from the discharge pipe 2; tube sheets 10 fixedly connected to the upper and lower inner rings of the tank body 1, each tube sheet 10 having symmetrically arranged evaporation holes 11; an evaporation tube 12 fixedly connected between the two tube sheets 10 through the symmetrical evaporation holes 11 for the evaporation of liquid raw materials; and a diversion pipe 9 fixedly connected to the upper circumferential surface of the evaporation tube 12 for diverting liquid raw materials. The cleaning medium is distributed and sprayed into each evaporator tube 12. An annular pipe 8 is fixedly connected to the top of the distribution pipe 9 to form a distribution ring for the cleaning medium. A first cleaning medium pipe 5 is fixedly connected to the circumferential surface of the annular pipe 8. A pressure column 28 is fixedly connected to the top of the first cleaning medium pipe 5 to increase the system pressure. A connecting pipe 17 is fixedly connected to the top of the pressure column 28 to connect different pipes. A second rotating column 27 is rotatably connected to the top of the pressure column 28 for rotating and adjusting the pipe connections. The second rotating column 27 extends into the interior of the pressure column 28 to support and fix the rotating column. A second pulley 26 is fixedly connected to the circumferential surface of the second rotating column 27 for transmitting power. A belt 25 is rolled on the circumferential surface of the second pulley 26 for driving. Other components include a hinge 29 fixedly connected to the circumferential surface of the second rotating column 27 for regulating the flow of the cleaning medium; a compression chamber 13 fixedly connected to one end of the connecting pipe 17 for introducing the cleaning medium into the chamber; a second cleaning medium pipe 14 fixedly connected to the left side of the compression chamber 13; a one-way valve 31 fixedly connected to the left side of the second cleaning pipe 14 for unidirectional flow of the cleaning medium into the compression chamber 13; a compression plate 15 slidably connected inside the compression chamber 13 for introducing and compressing the cleaning medium; a piston column 16 fixedly connected to the right side of the compression plate 15 for controlling the pressure of the compression chamber 13; a piston column 16 slidably connected to the right side of the compression chamber 13 for adjusting the movement of the piston; and a first fixing column 18 fixedly connected to the circumferential surface of the piston column 16 for fixing the piston. The piston 16 has a rotating rod 19 rotatably connected to the top of the first fixed post 18 for rotating and adjusting the piston 16. Second fixed posts 20 are rotatably connected to both the upper and lower sides of the rotating rod 19 for fixing it. A limit post 21 is fixedly connected to the top of the second fixed post 20 to limit the range of motion of the rotating rod 19. A fixed plate 7 is fixedly connected to the bottom of the compression box 13 for fixing it. A motor 6 is fixedly connected to the bottom of the fixed plate 7 for driving the entire system. A first rotating post 23 is fixedly connected to the output end of the motor 6 for transmitting power. The first rotating post 23 extends to the top of the fixed plate 7 for supporting and fixing the rotating post. A first pulley 24 is fixedly connected to the circumferential surface of the first rotating post 23.Used for transmitting power, the circumferential surface of the first pulley 24 and the belt 25 are in rolling connection for driving other components. A deflector block 22 is fixedly connected to the top of the first rotating column 23 to change the flow direction of the medium. The top of the deflector block 22 and the bottom of the second fixed column 20 are fixedly connected to fix the deflector block 22.

[0026] Working principle: During the distillation process, liquid feedstock is fed into the tube side of tank 1 through the feed pipe 4 fixedly connected to the bottom of tank 1. At the same time, heating steam enters the shell side of tank 1 through the second steam pipe 30 and flows out through the first steam pipe 3. The heat brought by the steam causes the liquid feedstock in the evaporation tube 12 to continuously vaporize and evaporate. The evaporated gaseous feedstock returns to the distillation column through the discharge pipe 2 fixedly connected to the top of tank 1. When the distillation operation is completed and the cleaning operation is performed, the cleaning medium enters through the one-way valve 31 and flows through the second cleaning medium pipe 14 through the compression plate 15 inside the compression tank 13, and is then introduced into the compression tank 13 and compressed. The medium enters the pressure column 28 through the connecting pipe 17, and the deflection block 22 of the first rotating column 23 driven by the motor 6 drives the piston column 16 to compress the compression plate 15. The first pulley 24 drives the belt 25, and then the belt 25 drives the second pulley 26 to drive the second rotating column 27. The second rotating column 27 drives the rotating blade 29 to pump the cleaning medium from the pressure column 28 into the first cleaning medium pipe 5. The first cleaning medium pipe 5 enters the tank 1 and connects to the annular pipe 8. Finally, the cleaning medium is sent to the evaporation pipe 12 through the diversion pipe 9. The residual substances are carried away by the cleaning medium and finally discharged from the feed pipe 4.

[0027] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A shell-and-tube reboiler for a distillation column, comprising: A tank body (1) is provided with a discharge pipe (2) fixedly connected to the top of the tank body (1), a first steam pipe (3) and a second steam pipe (30) fixedly connected to the circumferential surface of the tank body (1), and a feed pipe (4) fixedly connected to the bottom of the tank body (1). The tank body (1) is characterized in that: tube plates (10) are fixedly connected to the upper and lower inner rings respectively, and the two tube plates (10) are provided with mutually symmetrical evaporation holes (11). An evaporation pipe (12) is connected between the two tube plates (10) through the symmetrical evaporation holes. A diversion pipe (9) is fixedly connected to the upper circumferential surface of the evaporation pipe (12), and an annular pipe (8) is fixedly connected to the top of the diversion pipe (9).

2. A distillation column shell-and-tube reboiler as described in claim 1, characterized in that: The annular tube (8) is fixedly connected to the circumferential surface of the first cleaning medium tube (5), and the top end of the first cleaning medium tube (5) is fixedly connected to a pressure column (28), and the top end of the pressure column (28) is fixedly connected to a connecting tube (17).

3. A distillation column shell-and-tube reboiler as described in claim 2, characterized in that: The top end of the pressure column (28) is rotatably connected to a second rotating column (27), and the second rotating column (27) extends into the interior of the pressure column (28). A second pulley (26) is fixedly connected to the circumferential surface of the second rotating column (27).

4. A distillation column shell-and-tube reboiler as described in claim 3, characterized in that: The second pulley (26) is circumferentially connected to a belt (25), the second rotating column (27) is fixedly connected to a rotating blade (29), and one end of the connecting pipe (17) is fixedly connected to a compression box (13).

5. A distillation column shell-and-tube reboiler as described in claim 4, characterized in that: The left side of the compression box (13) is fixedly connected to a second cleaning medium pipe (14), and the left side of the second cleaning medium pipe (14) is fixedly connected to a one-way valve (31). The inside of the compression box (13) is slidably connected to a compression plate (15), and the right side of the compression plate (15) is fixedly connected to a piston column (16), and the piston column (16) and the right side of the compression box (13) are slidably connected.

6. A distillation column shell-and-tube reboiler as described in claim 5, characterized in that: The piston rod (16) is fixedly connected to a first fixed post (18) on its circumference. The top of the first fixed post (18) is rotatably connected to a rotating rod (19). The upper and lower sides of the rotating rod (19) are rotatably connected to second fixed posts (20). The top of the second fixed post (20) is fixedly connected to a limit post (21). The bottom of the compression box (13) is fixedly connected to a fixed plate (7).

7. A distillation column shell-and-tube reboiler as described in claim 6, characterized in that: A motor (6) is fixedly connected to the bottom end of the fixed plate (7). A first rotating column (23) is fixedly connected to the output end of the motor (6). The first rotating column (23) extends to the top end of the fixed plate (7). A first pulley (24) is fixedly connected to the circumferential surface of the first rotating column (23). The circumferential surface of the first pulley (24) and the belt (25) are rolled together. A deflection block (22) is fixedly connected to the top end of the first rotating column (23). The top end of the deflection block (22) is fixedly connected to the bottom end of the second fixed column (20).

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