A multi-pass helical baffle heat exchange structure for a reboiler

Abstract

The utility model relates to reboiler technical field especially for a kind of multi-pass spiral baffle plate heat exchange structure for reboiler, including head and shell, head side is fixedly connected with shell by flange, pull rod is installed in shell inner side, pull rod is connected with spiral baffle plate, spiral baffle plate inner side is inserted with heat exchange tube, distance component is set on pull rod, distance component includes rotating ring, fixed pipe is fixedly connected with the clamping of rotating ring side, first slot is set in fixed pipe inner side, driven rod assembly is installed in first slot inner side, rotating pipe is rotatably connected with the clamping of rotating ring side, and fixed pipe inner side is fixedly connected with clamping block, in the utility model, the mode that traditional baffle plate is rigidly supported is changed into flexible tensioning, eliminates the hidden danger of fretting wear, thereby long-termly maintained the designed baffle plate spacing, reduced the possibility that relative microslip occurs between baffle plate and distance component.

Description

Technical Field

[0001] This utility model relates to the field of reboiler technology, specifically to a multi-pass spiral baffle heat exchange structure for a reboiler. Background Technology

[0002] Reboilers are key heat transfer devices used in conjunction with distillation columns in industries such as chemical and oil refining. Their core function is to reheat the liquid material discharged from the bottom of the distillation column to a partially vaporized state, and the resulting gas-liquid mixture is returned to the column to provide a continuous supply of rising steam for the distillation process, maintaining the heat and mass transfer balance between the gas and liquid phases in the column. Shell-and-tube reboilers are a type of reboiler. In shell-and-tube reboilers, spiral baffles are usually installed on the shell side. The design concept is to allow the shell-side fluid to flow along a continuous, smooth spiral channel, rather than repeatedly making right-angle turns. The spiral flow path is smooth and avoids drastic changes in direction and flow separation, thereby significantly reducing fluid resistance. This means that with the same pumping power, the same heat exchange effect can be achieved with lower energy consumption. In the spiral baffle structure, the spacer tube is the core component for maintaining the baffle spacing. It works together with the tie rod and the baffle to form a stable support frame. It not only provides reliable mechanical support for the entire tube bundle (including heat exchange tubes), but also effectively disperses the load generated during equipment operation, thereby preventing the heat exchange tubes from bending or deforming due to uneven stress or vibration, and ensuring the long-term stable operation of the shell-and-tube reboiler. However, during long-term operation, the baffle plate will be subjected to alternating impacts from the shell-side fluid, resulting in high-frequency vibrations. This causes fretting wear on the contact surface between the baffle plate and the spacer tube. Long-term friction will damage the contact area between the spacer tube and the baffle plate, thus creating a gap between them. This makes it difficult for the spacer tube to stably maintain the baffle plate spacing, threatening the long-term safe operation of the reboiler. Therefore, a multi-pass spiral baffle heat exchange structure for reboilers is proposed to address the above problems. Utility Model Content

[0003] The purpose of this invention is to provide a multi-pass spiral baffle heat exchange structure for reboilers to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A multi-pass spiral baffle heat exchange structure for a reboiler, comprising a head and a shell. One side of the head is fixedly connected to the shell through a flange. A pull rod is installed inside the shell, and a spiral baffle is penetrated and connected by the pull rod. A heat exchange tube is inserted inside the spiral baffle. A distance fixing component is sleeved on the pull rod. The distance fixing component includes a rotating ring. One side of the rotating ring is clamped and fixedly connected to a fixed tube. A first groove is opened inside the fixed tube, and a driven rod component is installed inside the first groove. One side of the rotating ring is clamped and rotatably connected to a rotating tube. A clamping block is fixedly connected inside the rotating tube. A second groove is opened inside the rotating tube, and a moving rod component is installed inside the rotating tube. One end of the driven rod component and one end of the moving rod component are respectively installed with a connecting component.

[0005] As a further optimized content of the present utility model, wherein: the positive projection of the vertical section of the rotating ring is in the shape of a "king", the horizontal projection of the rotating ring is a regular hexagon, the rotating ring is threadedly connected with the moving rod component, and the length of the fixed tube is equal to the length of the second groove.

[0006] As a further optimized content of the present utility model, wherein: the driven rod component includes a first sleeve rod. A first hook head is welded on one side of the first sleeve rod. A first limiting block is welded on the outer side of the first sleeve rod. An internal threaded rod is fixedly connected to one end of the first sleeve rod.

[0007] As a further optimized content of the present utility model, wherein: the horizontal projection of the first sleeve rod is annular, the inner side of the first sleeve rod is closely attached to the outer side of the pull rod, the outer side of the first sleeve rod is closely attached to the inner side of the fixed tube, the first limiting block is slidably arranged in the first groove, and the outer side of the first limiting block is closely attached to the inner side of the first groove.

[0008] As a further optimized content of the present utility model, wherein: the moving rod component includes a second sleeve rod. A second hook head is welded on one end of the second sleeve rod. A second limiting block is welded on the outer side of the second sleeve rod. A grooved threaded rod is fixedly connected to one end of the second sleeve rod. A rod space groove is opened on the outer side of the grooved threaded rod. A threaded groove is opened inside the grooved threaded rod.

[0009] As a further optimized content of the present utility model, wherein: the threaded groove is adapted to the internal threaded rod. The second sleeve rod, the second hook head and the second limiting block are respectively the same shape as the first sleeve rod, the first hook head and the first limiting block. The outer side of the clamping block is closely attached to the inner side of the rod space groove, and the clamping block is slidably arranged in the rod space groove.

[0010] As a further optimization of this utility model, the connecting component includes a sliding collar with a groove on one side. A fixing post is fixedly installed inside the groove. An elastic gathering band is installed inside the sliding collar, and a rope is installed inside the sliding collar. The elastic gathering band and the rope are wound together into a roll structure. A spherical rope head is fixedly connected to one end of the rope. A fixing sleeve is clamped on the outside of the spherical rope head. One side of the fixing sleeve is welded and fixed to the spiral baffle plate.

[0011] Compared with the prior art, the beneficial effects of this utility model are: In this invention, the traditional rigid support method for the baffle plates is transformed into flexible tension by setting a fixed-distance component, eliminating the risk of fretting wear, thereby maintaining the designed baffle plate spacing for a long time, reducing the possibility of relative slight slippage between the baffle plates and the fixed-distance component, and ensuring the supporting function of the baffle plates for the heat exchange tubes. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the cross-sectional structure of the shell of this utility model; Figure 3 This is a schematic diagram of the distance-fixing component structure of this utility model; Figure 4 This is a cross-sectional structural diagram of the distance-fixing component of this utility model; Figure 5 This is an exploded structural diagram of the distance-fixing component of this utility model; Figure 6 This is a schematic diagram of the driven rod assembly structure of this utility model; Figure 7 This is a schematic diagram of the moving rod assembly structure of this utility model; Figure 8 This is a schematic diagram of the connecting component structure of this utility model; Figure 9 This is a cross-sectional structural diagram of the connecting component of this utility model.

[0013] In the diagram: 1. Head; 2. Shell; 3. Tie rod; 4. Spiral baffle; 5. Heat exchange tube; 6. Spacing assembly; 61. Rotating ring; 62. Fixing tube; 63. First groove; 64. Driven rod assembly; 641. First sleeve rod; 642. First hook head; 643. First limit block; 644. Internal thread rod; 65. Rotating tube; 66. Clamping block; 67. Second groove; 68. Moving rod assembly; 681. Second rod; 682. Second hook; 683. Second limiting block; 684. Grooved threaded rod; 685. Inter-rod groove; 686. Threaded groove; 69. Connecting component; 691. Sliding collar; 692. Groove; 693. Fixing post; 694. Elastic gathering strap; 695. Rope; 696. Spherical rope end; 697. Fixing sleeve. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0016] Please see Figures 1-9 This utility model provides a technical solution: A multi-pass spiral baffle heat exchange structure for a reboiler includes a head 1 and a shell 2. The shell 2 is fixedly connected to one side of the head 1 via a flange. A tie rod 3 is installed inside the shell 2. A spiral baffle 4 is connected through the tie rod 3. A heat exchange tube 5 is inserted inside the spiral baffle 4. A spacer assembly 6 is sleeved on the tie rod 3. The spacer assembly 6 includes a rotating ring 61. A fixed tube 62 is fixedly connected to one side of the rotating ring 61. A first groove 63 is opened inside the fixed tube 62. A driven rod assembly 64 is installed inside the first groove 63. A rotating tube 65 is rotatably connected to one side of the rotating ring 61. A locking block 66 is fixedly connected to the inside of the rotating tube 65. A second groove 67 is opened inside the rotating tube 65. A moving rod assembly 68 is installed inside the rotating tube 65. A connecting assembly 69 is installed at one end of the driven rod assembly 64 and one end of the moving rod assembly 68, respectively.

[0017] As a further implementation of this solution, the forward projection of the vertical cross-section of the rotating ring 61 is in the shape of the Chinese character "王" (king), the horizontal projection of the rotating ring 61 is a regular hexagon, the rotating ring 61 is threadedly connected to the moving rod assembly 68, the length of the fixed tube 62 is equal to the length of the second slot 67. The shape setting of the rotating ring 61 can, on the one hand, make the connection with the fixed tube 62 more stable, and on the other hand, prevent the two from separating when the rotating ring 61 rotates relative to the rotating tube 65. The threaded connection design between the rotating ring 61 and the moving rod assembly 68 can also make the two perform axial relative movement when they rotate relative to each other, thereby changing their relative positions.

[0018] As a further implementation of this solution, the driven rod assembly 64 includes a first sleeve rod 641. A first hook head 642 is welded to one side of the first sleeve rod 641, a first limiting block 643 is welded to the outside of the first sleeve rod 641, an internal threaded rod 644 is fixedly connected to one end of the first sleeve rod 641. The horizontal projection of the first sleeve rod 641 is annular. The inner side of the first sleeve rod 641 is in close contact with the outside of the pull rod 3, and the outside of the first sleeve rod 641 is in close contact with the inner side of the fixed tube 62. The first limiting block 643 is slidably arranged in the first slot 63, and the outside of the first limiting block 643 is in close contact with the inner side of the first slot 63. The design that the inner side of the first sleeve rod 641 is in close contact with the outside of the pull rod 3 enables it to be guided by the pull rod 3 while also wrapping the pull rod 3, strengthening the anti-deformation ability of the pull rod 3. And when the device is working as a whole, even if the first sleeve rod 641 shakes due to the impact of the fluid, it will not damage the pull rod 3 due to the gap between it and the pull rod 3. The design that the outside of the first sleeve rod 641 is in close contact with the inner side of the fixed tube 62 makes the movement of the first sleeve rod 641 in the fixed tube 62 more stable, thereby improving the movement performance when the components move relative to each other. The design of the first limiting block 643 enables the first sleeve rod 641 to rotate when the fixed tube 62 rotates, and at the same time, because it slides in the first slot 63, it can make the first sleeve rod 641 move axially stably in the fixed tube 62.

[0019] As a further implementation of this solution, the movable rod assembly 68 includes a second rod 681. A second hook 682 is welded to one end of the second rod 681, and a second limiting block 683 is welded to the outer side of the second rod 681. A grooved threaded rod 684 is fixedly connected to one end of the second rod 681. A groove 685 is formed on the outer side of the grooved threaded rod 684, and a threaded groove 686 is formed on the inner side of the grooved threaded rod 684. The threaded groove 686 is adapted to the internal threaded rod 644. The second rod 681, the second hook 682, and the second limiting block 683 have the same shape as the first rod 641, the first hook 642, and the first limiting block 643, respectively. The inner side of the groove 685 is tightly attached to the outer side of the locking block 66, and the locking block... The block 66 is slidably disposed in the rod groove 685. The design of the threaded groove 686 and the internal threaded rod 644 being adapted to each other allows the second rod 681 to gradually penetrate into the threaded groove 686 through relative movement with the internal threaded rod 644 when rotating, thereby shortening the combined length of the second rod 681 and the first rod 641. The design of multiple components such as the second rod 681, the second hook 682, and the second limiting block 683 having the same shape as the first rod 641, the first hook 642, and the first limiting block 643 ensures that the stiffness, strength, and tension response of the second rod 681 and the first rod 641 are completely consistent, making the stress distribution more uniform.

[0020] As a further implementation of this solution, the connecting component 69 includes a sliding collar 691. A groove 692 is formed on one side of the sliding collar 691, and a fixing post 693 is fixedly installed inside the groove 692. An elastic drawstring 694 is installed inside the sliding collar 691, and a rope 695 is also installed inside the sliding collar 691. The elastic drawstring 694 and the rope 695 are wound together into a coil structure. A spherical rope end 696 is fixedly connected to one end of the rope 695, and a fixing sleeve 697 is clamped onto the outside of the spherical rope end 696. One side of the fixing sleeve 697 is welded and fixed to the spiral baffle 4. The elastic drawstring 694 and the rope 695 are wound together... The elastic drawstring 694, wound into a coiled structure, continuously applies a clamping force to the rope 695, pointing towards the center of the sliding collar 691, due to its own elastic recoil force. This force can compensate for minor loosening of the connecting component 69 caused by vibration and other factors during operation, ensuring the reliability of the fixation. The design of the spherical rope end 696 ensures that when the spherical rope end 696 is inserted into the fixing sleeve 697, its spherical structure is locked by the closing structure inside the fixing sleeve 697. This connection method can withstand a certain amount of force in all directions and avoids sharp bends when under force, reducing the wear of the rope 695 itself and extending its service life.

[0021] Workflow: During installation, multiple spiral baffles 4 and the spacer assembly 6 are sequentially and alternately mounted on the pull rod 3, so that the multiple spiral baffles 4 are spliced ​​together to form a spiral integral conveying plate. Then, the first hook 642 welded to one side of the first sleeve rod 641 and the second hook 682 welded to one side of the second sleeve rod 681 are inserted into the grooves 692 opened in the corresponding sliding collar 691. Then, by rotating, the first hook 642 and the second hook 682 hook onto the corresponding fixed post 693 respectively. Next, the rotating tube 65 is clamped, and the rotating ring 61 is rotated using a hex wrench, thereby changing the relative position of the rotating ring 61 and the grooved threaded rod 684. At the same time, due to the second limit Position block 683 is set in the second groove 67, and locking block 66 is set in the inter-rod groove 685. Therefore, when the rotating ring 61 and the rotating tube 65 rotate relative to each other, the grooved threaded rod 684 and the second sleeve rod 681 will slide in the rotating tube 65. At the same time, the rotating ring 61 drives the fixed tube 62, which is fixed on one side, to rotate. When the fixed tube 62 rotates, it will drive the first limiting block 643, which is set in the first groove 63 on the inner side of the fixed tube 62, to rotate. This causes the first sleeve rod 641 and the internal threaded rod 644 fixed thereto to rotate. By changing the relative position of the internal threaded rod 644 and the threaded groove 686, the internal threaded rod 644 is inserted into the grooved threaded rod 684. During the above process, the rotation of the rotating ring 61 changes the relative position of the moving rod assembly 68 and the driven rod assembly 64 located in the rotating tube 65 and the fixed tube 62. At the same time, the first hook head 642 and the second hook head 682 will pull the corresponding sliding collar 691 through the corresponding fixed post 693. When the sliding collar 691 is under tension, the rope 695 in the sliding collar 691 is restricted by the fixed sleeve 697 due to the spherical rope head 696 fixed at one end, so more of it is pulled out of the sliding collar 691. As the rope 695 is pulled, it will drive the elastic drawstring 694 to wind up, thereby... It stores elastic potential energy. The tension generated by multiple ropes 695 through the spherical rope head 696 on the fixed sleeve 697 makes the two adjacent spiral baffles 4 stable due to the tension of the relative connecting components 69. Since the spacing component 6 relies on the tension to help stabilize the spiral baffles 4, there will be no excessive friction between the spacing component 6 and the spiral baffles 4, which will lead to wear. This will extend the service life of the device. After the spacing component 6 is installed, the tie rod 3 is installed in the housing 2. The heat exchange tube 5 is then installed in the housing 2 through the hole on the spiral baffle 4. Then the housing 2 and the end cap 1 are fixed with flanges, and the device installation is completed.

[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-pass spiral baffle heat exchange structure for a reboiler, comprising a head (1) and a shell (2), characterized in that: One side of the head (1) is fixedly connected to a shell (2) through a flange. A pull rod (3) is installed inside the shell (2). The pull rod (3) is connected through a spiral baffle (4). A heat exchange tube (5) is inserted inside the spiral baffle (4). A distance fixing component (6) is sleeved on the pull rod (3). The distance fixing component (6) includes a rotating ring (61). One side of the rotating ring (61) is clamped and fixedly connected to a fixed tube (62). A first slot (63) is opened inside the fixed tube (62). A driven rod component (64) is installed inside the first slot (63). One side of the rotating ring (61) is clamped and rotatably connected to a rotating tube (65). A clamping block (66) is fixedly connected inside the rotating tube (65). A second slot (67) is opened inside the rotating tube (65). A moving rod component (68) is installed inside the rotating tube (65). One end of the driven rod component (64) and one end of the moving rod component (68) are respectively installed with a connecting component (69).

2. The multi-pass spiral baffle heat exchange structure for a reboiler according to claim 1, characterized in that: The positive projection of the vertical section of the rotating ring (61) is in the shape of "king". The horizontal projection of the rotating ring (61) is a regular hexagon. The rotating ring (61) is threadedly connected with the moving rod component (68). The length of the fixed tube (62) is equal to the length of the second slot (67).

3. The multi-pass spiral baffle heat exchange structure for a reboiler according to claim 1, characterized in that: The driven rod component (64) includes a first sleeve rod (641). A first hook head (642) is welded on one side of the first sleeve rod (641). A first limiting block (643) is welded on the outer side of the first sleeve rod (641). An inner threaded rod (644) is fixedly connected to one end of the first sleeve rod (641).

4. A multi-pass spiral baffle heat exchange structure for a reboiler according to claim 3, characterized in that: The horizontal projection of the first sleeve rod (641) is annular. The inner side of the first sleeve rod (641) is closely attached to the outer side of the pull rod (3). The outer side of the first sleeve rod (641) is closely attached to the inner side of the fixed tube (62). The first limiting block (643) is slidably arranged in the first slot (63), and the outer side of the first limiting block (643) is closely attached to the inner side of the first slot (63).

5. A multi-pass spiral baffle heat exchange structure for a reboiler according to claim 1, characterized in that: The moving rod component (68) includes a second sleeve rod (681). A second hook head (682) is welded on one end of the second sleeve rod (681). A second limiting block (683) is welded on the outer side of the second sleeve rod (681). A grooved threaded rod (684) is fixedly connected to one end of the second sleeve rod (681). A rod space groove (685) is opened on the outer side of the grooved threaded rod (684). A threaded groove (686) is opened inside the grooved threaded rod (684).

6. A multi-pass spiral baffle heat exchange structure for a reboiler according to claim 5, characterized in that: The threaded groove (686) is adapted to the inner threaded rod (644). The second sleeve rod (681), the second hook head (682) and the second limiting block (683) are respectively the same shape as the first sleeve rod (641), the first hook head (642) and the first limiting block (643). The outer side of the clamping block (66) is closely attached to the inner side of the rod space groove (685), and the clamping block (66) is slidably arranged in the rod space groove (685).

7. A multi-pass spiral baffle heat exchange structure for a reboiler according to claim 1, characterized in that: The connecting assembly (69) includes a sliding collar (691), a groove (692) is provided on one side of the sliding collar (691), a fixing post (693) is fixedly provided inside the groove (692), an elastic gathering band (694) is installed inside the sliding collar (691), a rope (695) is installed inside the sliding collar (691), the elastic gathering band (694) and the rope (695) are wound together into a roll structure, a spherical rope head (696) is fixedly connected to one end of the rope (695), a fixing sleeve (697) is clamped on the outside of the spherical rope head (696), and one side of the fixing sleeve (697) is welded and fixed to the spiral baffle (4).

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