Heat exchanger for a loop process polypropylene pneumatic conveying system

Abstract

The utility model relates to the technical fields of heat exchanger especially, relates to a kind of heat exchanger of ring pipe technology polypropylene air conveying system, it is provided with the fixed screwing adjusting mechanism, the height cooperation fixed seat is adapted to the auxiliary fixation of heat exchanger, improve stability;Including connecting flange, connecting pipe, end cover, warped sheet tube and heat exchange box, two groups the connecting pipe tail side respectively is provided with a group of connecting flange, two groups of connecting pipe front side is connected in end cover rear side, end cover front side middle part is provided with warped sheet tube, warped sheet tube front side is connected to heat exchange box, further include bottom frame, height-adjusting screw sleeve, height-adjusting screw, screw disc, restraint sleeve, slide and fixed seat, the heat exchange box bottom side middle part is connected with bottom frame top side, height-adjusting screw top side is connected with screw disc bottom side middle part, bottom frame bottom side left and right part is respectively connected with a group of restraint sleeve, every group restraint sleeve inner wall is respectively slidably connected with a group of slide outer wall, height-adjusting screw and slide bottom side are connected with fixed seat by adjustable connecting mechanism.

Description

Technical Field

[0001] This utility model relates to the technical field of heat exchangers, specifically to a heat exchanger for a polypropylene air delivery system in a loop process. Background Technology

[0002] The loop reactor process is a continuous gas-phase or liquid-phase polymerization technology with a loop reactor as its core, and it is widely used, especially in the production of polypropylene (PP).

[0003] Typically, this process requires a heat exchanger to facilitate heat reuse. Existing heat exchangers, such as the ring-tube polypropylene pneumatic conveying system heat exchanger with patent publication number CN204142056U, mount the finned main tubes on the end caps. This allows for individual cleaning of each tube bundle via openings on the outer side of the end plate, based on operational conditions, resulting in effective cleaning. Increasing the finned tube spacing and fin gaps prevents dust, lint, and other impurities from clogging the fins, ensuring high heat exchange efficiency. Reinforcing ribs added between the fins prevent bending and detachment, extending the lifespan of the heat exchanger core.

[0004] However, the heat exchange box and end cover of this device are only connected by finned tubes, resulting in poor stability. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides a heat exchanger for a loop-tube polypropylene air-feeding system that features a fixable screw-on adjustment mechanism, adapts to a height-fitting fixing seat for auxiliary fixation of the heat exchanger, and improves stability.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a heat exchanger for a polypropylene air-pumped system in a loop pipe process, comprising connecting flanges, connecting pipes, end caps, finned tubes, and a heat exchange box. Two sets of connecting pipes are each provided with a connecting flange at their tail ends. The front ends of the two sets of connecting pipes are connected to the rear ends of the end caps. A finned tube is provided in the middle of the front end of the end caps, and the front end of the finned tube is connected to the heat exchange box. The system also includes a bottom frame, a height-adjusting sleeve, a height-adjusting screw, a screw plate, a constraint sleeve, a slide, and a fixed seat. The middle of the bottom side of the heat exchange box is connected to the top side of the bottom frame. The inner side of the bottom of the bottom frame is connected to the outer side of the height-adjusting sleeve. The inner wall of the height-adjusting sleeve is screwed to the outer wall of the height-adjusting screw. The top side of the height-adjusting screw is connected to the middle of the bottom side of the screw plate. A set of constraint sleeves is connected to the left and right sides of the bottom side of the bottom frame. The inner wall of each constraint sleeve is slidably connected to the outer wall of a slide. The height-adjusting screw and the bottom side of the slide are connected to a fixed seat via an adjustable connecting mechanism.

[0009] Preferably, the adjustable connection mechanism includes a circular seat, a rotating sleeve, a hinge block, a hinge shaft, and a hinge frame. The bottom side of the height adjustment screw is rotatably connected to the middle of the top side of the circular seat, and the bottom sides of the two sets of slides are respectively fixedly connected to the left and right sides of the top side of the circular seat. The outer side of the circular seat is rotatably connected to the inner side of the rotating sleeve. The bottom side of the rotating sleeve is connected to the top side of the hinge block. The outer side of the hinge block is movably connected to the inner side of the hinge frame via the hinge shaft. The bottom side of the hinge frame is connected to the middle of the top side of the fixed seat.

[0010] Preferably, it also includes a connecting plate, a connecting spring, a top support plate, and an anti-slip contact circular plate. The lower outer side of the height adjustment screw is connected to the inner side of the anti-slip contact circular plate, the front side of the top of the circular seat is connected to the bottom side of the connecting plate, and the rear side of the connecting plate is connected to the front side of the anti-slip contact circular plate via the top support plate.

[0011] Preferably, it also includes a sliding sleeve, a sliding rod, and a pull tab. The inner side of the connecting plate is connected to the outer side of the sliding sleeve, the inner wall of the sliding sleeve is slidably connected to the outer wall of the sliding rod, the front side of the sliding rod is connected to the middle of the rear side of the pull tab, and the rear side of the sliding rod is connected to the middle of the front side of the top support plate.

[0012] Preferably, it also includes an oil injection nozzle, wherein the outer side of the height adjustment screw sleeve is connected to the inner side of the oil injection nozzle.

[0013] Preferably, it also includes an oil filling cap, wherein the outer side of the oil filling nozzle and the inner side of the oil filling cap are detachably installed.

[0014] (III) Beneficial Effects

[0015] Compared with the prior art, this utility model provides a heat exchanger for a polypropylene air conveying system in a loop process, which has the following advantages:

[0016] Two sets of connecting flanges are fixed to the water circulation port of the system, and two sets of connecting pipes form a passage. End caps are installed and fixed at the port to position the finned tubes connected to the heat exchanger housing. Then, according to the actual height of the heat exchanger housing and the ground, the height adjustment screw is turned to rotate. The constraint sleeves on both sides slide and constrain the sliding bracket. The adjustable connection mechanism connects to the fixed seat and raises and lowers accordingly. After it is in place, the adjustable connection mechanism adapts to the ground angle, so that the fixed seat is fixed to the ground. Thus, the height adjustment sleeve and the height adjustment screw thread self-lock, forming a stable support structure to assist in the support of the heat exchanger housing. A fixed screw adjustment mechanism is set up to adapt to the height and assist in the fixation of the heat exchanger with the fixed seat, thereby improving stability. Attached Figure Description

[0017] Figure 1 This is an axial view of the structural schematic diagram of this utility model;

[0018] Figure 2 This utility model Figure 1 The right view;

[0019] Figure 3 This utility model Figure 1 Rear view;

[0020] Figure 4 This utility model Figure 1 A magnified view of A.

[0021] The following are labels in the attached diagram: 1. Connecting flange; 2. Connecting pipe; 3. End cap; 4. Tilt tube; 5. Heat exchanger body; 6. Base frame; 7. Height adjusting sleeve; 8. Height adjusting screw; 9. Tightening plate; 10. Constraint sleeve; 11. Slide; 12. Fixed seat; 13. Circular seat; 14. Rotating sleeve; 15. Hinge block; 16. Hinge shaft; 17. Hinge frame; 18. Connecting plate; 19. Connecting spring; 20. Top support plate; 21. Anti-slip contact circular plate; 22. Slide sleeve; 23. Slide rod; 24. Pull tab; 25. Oil inlet; 26. Oil inlet cap. Detailed Implementation

[0022] 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.

[0023] Example

[0024] Please see Figure 1-4The heat exchanger for a polypropylene air-pumped system using a loop pipe includes a connecting flange 1, connecting pipes 2, end caps 3, finned tubes 4, and a heat exchange box 5. Two sets of connecting pipes 2 are each equipped with a connecting flange 1 at their tail ends. The front sides of the two sets of connecting pipes 2 are connected to the rear side of the end cap 3. A finned tube 4 is located in the middle of the front side of the end cap 3, and the front side of the finned tube 4 is connected to the heat exchange box 5. The system also includes a base frame 6, an adjusting screw sleeve 7, an adjusting screw 8, a screw plate 9, a constraint sleeve 10, a slide 11, and a fixing seat 12. The middle of the bottom side of the heat exchange box 5 is connected to the top side of the base frame 6. The inner side of the bottom of the base frame 6 is connected to the outer side of the adjusting screw sleeve 7. The inner wall of the adjusting screw sleeve 7 is screwed to the outer wall of the adjusting screw 8. The top side of the adjusting screw 8 is connected to the middle of the bottom side of the screw plate 9. A set of constraint sleeves 10 is connected to the left and right sides of the bottom side of the base frame 6. The inner wall of each constraint sleeve 10 is... The system is slidably connected to the outer wall of a set of slides 11. The height adjustment screw 8 and the bottom side of the slides 11 are connected to a fixed seat 12 via an adjustable connection mechanism. The system is fixed to the water circulation port of the system via two sets of connecting flanges 1. The system forms a passage via two sets of connecting pipes 2. The end cap 3 is installed and fixed at the port, so that the finned tube 4 is connected to the heat exchange box 5 in the corresponding position. Then, according to the actual height position between the heat exchange box 5 and the ground, the height adjustment screw 8 is turned to rotate. The constraint sleeves 10 on both sides slide and constrain the slides 11. The fixed seat 12 is connected to the adjustable connection mechanism and raised and lowered accordingly. After it is in place, the adjustable connection mechanism adapts to the ground angle so that the fixed seat 12 is fixed to the ground. Thus, the height adjustment screw sleeve 7 and the height adjustment screw 8 are self-locked by the threads, forming a stable support structure to provide auxiliary support for the heat exchange box 5.

[0025] The adjustable connection mechanism includes a circular seat 13, a rotating sleeve 14, a hinge block 15, a hinge shaft 16, and a hinge frame 17. The bottom side of the height adjustment screw 8 is rotatably connected to the middle of the top side of the circular seat 13, and the bottom sides of the two sets of slides 11 are respectively fixedly connected to the left and right sides of the top side of the circular seat 13. The outer side of the circular seat 13 is rotatably connected to the inner side of the rotating sleeve 14. The bottom side of the rotating sleeve 14 is connected to the top side of the hinge block 15. The outer side of the hinge block 15 is movably connected to the inner side of the hinge frame 17 via the hinge shaft 16. The bottom side of the hinge frame 17 is connected to the middle of the top side of the fixed seat 12. The rotating sleeve 14 rotates on the outside of the circular seat 13, and the hinge frame 17 is constrained to move on the outside of the hinge block 15 via the hinge shaft 16, so that the fixed seat 12 can move and fit against the ground to be fixed, improving practicality.

[0026] It also includes a connecting plate 18, a connecting spring 19, a top support plate 20, and an anti-slip contact circular plate 21. The lower outer side of the height adjustment screw 8 is connected to the inner side of the anti-slip contact circular plate 21. The front side of the top of the circular seat 13 is connected to the bottom side of the connecting plate 18. The rear side of the connecting plate 18 is connected to the front side of the anti-slip contact circular plate 21 via the top support plate 20. Under the connection of the connecting plate 18, the connecting spring 19 can provide elastic support, so that the top support plate 20 acts on the outer side of the anti-slip contact circular plate 21 for support. The static friction generated prevents the anti-slip contact circular plate 21 from rotating without external force, thereby improving stability.

[0027] It also includes a sliding sleeve 22, a sliding rod 23, and a pull tab 24. The inner side of the connecting plate 18 is connected to the outer side of the sliding sleeve 22. The inner wall of the sliding sleeve 22 is slidably connected to the outer wall of the sliding rod 23. The front side of the sliding rod 23 is connected to the middle of the rear side of the pull tab 24. The rear side of the sliding rod 23 is connected to the middle of the front side of the top support plate 20. By holding the pull tab 24, the sliding rod 23 can slide forward under the constraint of the sliding sleeve 22, thereby connecting the top support plate 20 to move forward and release the anti-slip contact plate 21, which facilitates the rotation operation of the height adjustment screw 8.

[0028] It also includes an oil nozzle 25, with the outer side of the adjusting screw sleeve 7 connected to the inner side of the oil nozzle 25; oil can be injected into the inner wall of the adjusting screw sleeve 7 through the oil nozzle 25 for convenient lubrication and maintenance.

[0029] It also includes an oil filling cap 26, and the outer side of the oil filling nozzle 25 and the inner side of the oil filling cap 26 can be detachably installed; after the oil filling cap 26 is installed on the outer side of the oil filling nozzle 25, the inside of the oil filling nozzle 25 can be sealed and protected, improving reliability.

[0030] In summary, when the heat exchanger of the loop-tube polypropylene air-pump system is in use, it is fixed to the water circulation port of the system by two sets of connecting flanges 1, and a passage is formed by two sets of connecting pipes 2. The end caps 3 are installed and fixed at the port, so that the finned tubes 4 are connected to the heat exchange box 5 in the corresponding position. Then, according to the actual height position between the heat exchange box 5 and the ground, the sliding rod 23 can be slid forward under the constraint of the sliding sleeve 22 by holding the pull tab 24. This causes the top support plate 20 to move forward and loosen the anti-slip contact circular plate 21. By turning the height adjustment screw 8, the height adjustment screw 8 is rotated, and the constraint sleeves 10 on both sides slide and constrain the slide frame 11. The connecting fixed seat 12 is raised and lowered accordingly. After it is in place, the rotating sleeve 14 rotates the circular seat 1. 3. The outer side rotates and is constrained by the hinge frame 17 via the hinge shaft 16 to move on the outside of the hinge block 15, so that the fixed seat 12 can move and fit against the ground to be fixed. Under the connection of the connecting plate 18, it can be elastically supported by the connecting spring 19, so that the support plate 20 acts on the outside of the anti-slip contact circular plate 21 for support. The static friction generated prevents the anti-slip contact circular plate 21 from rotating without external force. Thus, the height adjustment sleeve 7 and the height adjustment screw 8 are self-locked by the threads, forming a stable support structure to provide auxiliary support for the heat exchange box 5. In addition, oil can be injected into the inner wall of the height adjustment sleeve 7 through the oil injection nozzle 25 for convenient lubrication and maintenance. After the oil injection cap 26 is installed on the outside of the oil injection nozzle 25, the inside of the oil injection nozzle 25 can be sealed and protected to improve reliability.

[0031] The connecting flange 1, connecting pipe 2, end cap 3, finned tube 4, and heat exchange box 5 are all equivalent to the corresponding components of the annular process polypropylene air delivery system heat exchanger of the patented CN2 finned tube 4 rotating sleeve 142 heat exchange box 56U. Here we are just using them without making any structural or functional improvements, so we will not go into detail here.

[0032] 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 heat exchanger for a polypropylene pneumatic conveying system using a loop pipe process, comprising a connecting flange (1), connecting pipes (2), an end cap (3), finned tubes (4), and a heat exchange chamber (5), wherein a connecting flange (1) is provided on the tail side of each of the two sets of connecting pipes (2), the front sides of the two sets of connecting pipes (2) are connected to the rear side of the end cap (3), a finned tube (4) is provided in the middle of the front side of the end cap (3), and the front side of the finned tube (4) is connected to the heat exchange chamber (5), characterized in that, It also includes a bottom frame (6), a height adjustment sleeve (7), a height adjustment screw (8), a screw plate (9), a constraint sleeve (10), a slide (11), and a fixed seat (12). The bottom middle of the heat exchange box (5) is connected to the top of the bottom frame (6). The bottom inner side of the bottom of the bottom frame (6) is connected to the outer side of the height adjustment sleeve (7). The inner wall of the height adjustment sleeve (7) is screwed to the outer wall of the height adjustment screw (8). The top of the height adjustment screw (8) is connected to the bottom middle of the screw plate (9). A set of constraint sleeves (10) is connected to the left and right sides of the bottom of the bottom frame (6). The inner wall of each set of constraint sleeves (10) is slidably connected to the outer wall of a set of slides (11). The bottom of the height adjustment screw (8) and the slide (11) are connected to the fixed seat (12) via an adjustable connection mechanism.

2. The heat exchanger for the polypropylene pneumatic conveying system in a loop process according to claim 1, characterized in that: The adjustable connection mechanism includes a circular seat (13), a rotating sleeve (14), a hinge block (15), a hinge shaft (16), and a hinge frame (17). The bottom side of the height adjustment screw (8) is rotatably connected to the middle of the top side of the circular seat (13), and the bottom sides of the two sets of slides (11) are fixedly connected to the left and right sides of the top side of the circular seat (13), respectively. The outer side of the circular seat (13) is rotatably connected to the inner side of the rotating sleeve (14), the bottom side of the rotating sleeve (14) is connected to the top side of the hinge block (15), the outer side of the hinge block (15) is movably connected to the inner side of the hinge frame (17) via the hinge shaft (16), and the bottom side of the hinge frame (17) is connected to the middle of the top side of the fixed seat (12).

3. The heat exchanger for the polypropylene pneumatic conveying system in a loop process according to claim 2, characterized in that: It also includes a connecting plate (18), a connecting spring (19), a top support plate (20), and an anti-slip contact circular plate (21). The lower outer side of the height adjustment screw (8) is connected to the inner side of the anti-slip contact circular plate (21). The front side of the top of the circular seat (13) is connected to the bottom side of the connecting plate (18). The rear side of the connecting plate (18) is connected to the front side of the anti-slip contact circular plate (21) via the top support plate (20).

4. The heat exchanger for the polypropylene pneumatic conveying system in a loop process according to claim 3, characterized in that: It also includes a sliding sleeve (22), a sliding rod (23) and a pull tab (24). The inner side of the connecting plate (18) is connected to the outer side of the sliding sleeve (22). The inner wall of the sliding sleeve (22) is slidably connected to the outer wall of the sliding rod (23). The front side of the sliding rod (23) is connected to the middle of the rear side of the pull tab (24). The rear side of the sliding rod (23) is connected to the middle of the front side of the top support plate (20).

5. The heat exchanger for a polypropylene pneumatic conveying system in a loop process according to claim 1, characterized in that: It also includes an oil injection nozzle (25), the outer side of the height adjustment screw sleeve (7) is connected to the inner side of the oil injection nozzle (25).

6. The heat exchanger for a polypropylene pneumatic conveying system in a loop process according to claim 5, characterized in that: It also includes an oil filling cap (26), the outer side of the oil filling nozzle (25) and the inner side of the oil filling cap (26) can be detachably installed.

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