A shell-and-tube heat exchanger heating device

Abstract

The utility model discloses a kind of tube-bank heat exchanger heating device, including exchanger, the water inlet is fixedly installed on the exchanger, the mounting frame and mounting pipe are fixedly installed on the exchanger, rotatingly installed in the mounting pipe is filter frame, the first gear ring is sleeved on the filter frame, rotatingly installed in the mounting pipe is driving wheel, the driving wheel is engaged with the first gear ring, rotatingly installed on the mounting pipe is scraper rod, the scraper rod is surface bonded with filter frame, discharging pipe is fixedly installed in the mounting pipe, rotatingly installed in the discharging pipe is mounting ring, the discharging pipe is equipped with multiple groups of ring distribution flap, larger impurity particles are intercepted in the water inlet front end by rotating filter frame, surface is scraped dynamically in combination with scraper rod, improve the scale inhibition rate of filter frame, avoid scale layer formation in the inner wall of heat exchange tube from source, heat exchange tube keeps clean state, avoid heat transfer coefficient attenuation rate and long-term operation energy consumption reduction.

Description

Technical Field

[0001] This utility model relates to the technical field of shell and tube heat exchangers, specifically a heating device for a shell and tube heat exchanger. Background Technology

[0002] A shell-and-tube heater is an industrial heat exchange device with a steel tube array as its core structure. It is mainly used for the heating treatment of fluids in the chemical industry. Its typical structure consists of 18 steel tubes, each 3 meters long and with a specification of Ф25×2.5mm. Heat exchange is achieved through the temperature difference between the medium inside and outside the tubes.

[0003] In the actual operation of shell-and-tube heat exchanger heating devices, the deposition of suspended particles in the fluid, such as silt, scale nuclei, and biological slime, triggers a double deterioration effect. The particles continuously accumulate on the inner wall of the heat exchange tubes, forming a low thermal conductivity scale layer, which leads to an exponential decrease in heat transfer efficiency. Furthermore, the uneven distribution of the scale layer causes an increase in the temperature gradient of the tube wall, accelerating material fatigue cracking. If fine particles invade the tube bundle gaps, they cause dead zones in the shell-side fluid flow, significantly reducing the effective heat exchange area. To restore heat exchange performance, the industry is forced to adopt periodic shutdowns for chemical cleaning and mechanical scrubbing, resulting in systemic economic losses. Not only are cleaning costs high, but the losses caused by shutdowns also increase. Utility Model Content

[0004] The purpose of this invention is to provide a shell-and-tube heat exchanger heating device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a shell-and-tube heat exchanger heating device, comprising an exchanger, an inlet fixedly mounted on the exchanger, a mounting frame and a mounting pipe fixedly mounted on the exchanger, the mounting frame being located between the mounting pipe and the inlet, the mounting frame communicating with the mounting pipe and the inlet, a filter frame rotatably mounted inside the mounting pipe, a first toothed ring sleeved on the filter frame, a drive wheel rotatably mounted inside the mounting pipe, the drive wheel meshing with the first toothed ring, a scraper rotatably mounted on the mounting pipe, the scraper being fitted against the surface of the filter frame, the mounting... A discharge pipe is fixedly installed inside the tube. An installation ring is rotatably installed inside the discharge pipe. The filter frame is rotatably connected to the discharge pipe. A second toothed ring is sleeved on the installation ring. Multiple sets of annularly distributed opening and closing plates are provided inside the discharge pipe. Multiple sets of opening and closing plates are rotatably connected to the discharge pipe through installation shafts. Multiple sets of installation shafts are annularly distributed outside the installation ring. A third gear is sleeved on each of the multiple sets of installation shafts. Multiple sets of third gears are meshed with the second toothed ring. Two sets of movable frames are slidably installed inside the installation frame. A filter screen frame is clamped in each of the two sets of movable frames. Two sets of symmetrically distributed clamping frames are slidably installed inside the installation frame.

[0006] As a further preferred embodiment of this technical solution, a first gear is sleeved on the scraper, a first rack is slidably installed inside the mounting tube, the first rack meshes with the first gear, a cylinder is fixedly installed inside the mounting tube, the first rack is fixedly connected to the output end of the cylinder piston rod, a circulating air pump is fixedly installed inside the mounting tube, the air outlet of the cylinder is connected to the air inlet of the circulating air pump through a purification pipeline, and the air outlet of the circulating air pump is connected to the air inlet of the cylinder through a high-pressure air pipe.

[0007] As a further preferred embodiment of this technical solution, a lead screw is rotatably installed inside the mounting frame. The lead screw passes through two sets of movable frames and is threadedly connected to the two sets of movable frames respectively. Two sets of symmetrically distributed slots are provided on each of the two sets of movable frames. The two sets of slot frames are correspondingly arranged with the slots. The two sets of slot frames are movably engaged with the corresponding movable frames through the corresponding slots.

[0008] As a further preferred embodiment of this technical solution, telescopic tubes are provided between the two sets of card frames and the mounting frame. The two ends of the telescopic tubes are fixedly connected to the card frames and the mounting frame, respectively. A bidirectional screw is rotatably installed inside the mounting frame. The two ends of the bidirectional screw pass through the two sets of card frames and are threadedly connected to the two sets of card frames, respectively.

[0009] As a further preferred embodiment of this technical solution, two sets of symmetrically distributed slides are slidably installed inside the movable frame. Each set of slides is fixedly equipped with a rod, and the two sets of rods are movably engaged with the filter frame. Each set of rods is fitted with a spring, and the two ends of the spring are fixedly connected to the rod and the movable frame, respectively. Each set of slides is fixedly equipped with a second rack, and a second gear is provided between the two sets of second racks.

[0010] As a further preferred embodiment of this technical solution, the second gear is rotatably connected to the movable frame via a mounting rod, and the second gear is meshed with two sets of second racks respectively. A torsion spring is sleeved on the mounting rod, and the two ends of the torsion spring are fixedly connected to the second gear and the movable frame respectively.

[0011] This utility model provides a shell-and-tube heat exchanger heating device, which has the following beneficial effects: (1) This utility model intercepts larger impurity particles at the front end of the water inlet by rotating the filter frame and dynamically scraping the surface with the scraper to improve the scale inhibition rate of the filter frame, thereby preventing the formation of scale on the inner wall of the heat exchange tube from the source, keeping the heat exchange tube clean, avoiding the attenuation rate of the heat transfer coefficient and the reduction of energy consumption during long-term operation. The impurities filtered by the filter frame can be flexibly discharged into the discharge pipe through the opening and closing of the opening and closing plate in the discharge pipe, avoiding the accumulation of impurities on the filter frame that affects the filtration rate. Automatic discharge does not require stopping the machine for cleaning, thus improving the working efficiency of the device. The scraper is rotated and installed on the installation pipe, and the angle can be adjusted by the cylinder in conjunction with the first rack and the first gear, making it convenient for the staff to maintain the cleanliness of the scraper.

[0012] (2) This utility model achieves flexible replacement of the filter device between the two sets of card frames by using two sets of movable frames on the mounting frame and filter screen frames in the movable frames. After being filtered by the filter screen frames, the impurities in the water flow are filtered more finely before entering the exchanger through the inlet, which further improves the scale inhibition rate and reduces long-term operating energy consumption. At the same time, the two sets of filter screen frames in the two sets of movable frames can be used without gaps. Without affecting the normal operation of the exchanger, the staff can flexibly replace the filter screen frames in the idle movable frames. There is zero risk of leakage during disassembly and assembly, and there is no need to stop the machine to affect the normal working progress of the exchanger. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the mounting tube of this utility model; Figure 3 This is a schematic diagram showing the structural separation of the installation pipe and the discharge pipe of this utility model; Figure 4 For the present utility model Figure 3 Enlarged view of the structure at point A; Figure 5 For the present utility model Figure 3 Enlarged view of the structure at point -B; Figure 6 This is a schematic diagram showing the structural separation of the mounting frame and the movable frame of this utility model; Figure 7 This is a schematic diagram showing the structural separation of the movable frame and the filter frame of this utility model; Figure 8 For the present utility model Figure 7 Enlarged view of the structure at point C; In the diagram: 1. Exchanger; 2. Mounting pipe; 3. Inlet; 4. Filter frame; 5. First gear ring; 6. Drive wheel; 7. Scraper; 8. First gear; 9. First rack; 10. Cylinder; 11. Circulating air pump; 12. Discharge pipe; 13. Mounting ring; 14. Second gear ring; 15. Opening and closing plate; 16. Mounting shaft; 17. Third gear; 18. Mounting frame; 19. Moving frame; 20. Lead screw; 21. Slot; 22. Frame; 23. Telescopic pipe; 24. Bidirectional screw; 25. Filter screen frame; 26. Slide; 27. Insert rod; 28. Spring; 29. ​​Second rack; 30. Second gear; 31. Mounting rod; 32. Torsion spring. Detailed Implementation

[0014] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0015] This utility model provides a technical solution: such as Figures 1-5As shown in this embodiment, a shell-and-tube heat exchanger heating device includes an exchanger 1, an inlet 3 fixedly mounted on the exchanger 1, a mounting bracket 18 and an installation pipe 2 fixedly mounted on the exchanger 1, the mounting bracket 18 being located between the installation pipe 2 and the inlet 3, the mounting bracket 18 communicating with the installation pipe 2 and the inlet 3, a filter frame 4 rotatably mounted inside the installation pipe 2, a first toothed ring 5 sleeved on the filter frame 4, and a drive wheel 6 rotatably mounted inside the installation pipe 2. The drive wheel 6 is meshed with the first toothed ring 5. A scraper 7 is rotatably mounted on the mounting tube 2, and the scraper 7 is fitted against the surface of the filter frame 4. A discharge pipe 12 is fixedly mounted inside the mounting tube 2, and an mounting ring 13 is rotatably mounted inside the discharge pipe 12. The filter frame 4 is rotatably connected to the discharge pipe 12. A second toothed ring 14 is sleeved on the mounting ring 13. Multiple sets of annularly distributed opening and closing plates 15 are provided inside the discharge pipe 12, and all sets of opening and closing plates 15 are connected by a mounting shaft 16. Rotarily connected to the discharge pipe 12, multiple sets of mounting shafts 16 are annularly distributed on the outside of the mounting ring 13. Each set of mounting shafts 16 is fitted with a third gear 17, which meshes with a second gear ring 14. Two sets of movable frames 19 are slidably mounted inside the mounting frame 18, and filter frames 25 are snapped into each set of movable frames 19. Two sets of symmetrically distributed retaining frames 22 are slidably mounted inside the mounting frame 18. A first gear 8 is fitted onto the scraper rod 7. A first rack 9 is slidably installed inside the mounting pipe 2, and the first rack 9 meshes with a first gear 8. A cylinder 10 is fixedly installed inside the mounting pipe 2, and the first rack 9 is fixedly connected to the output end of the piston rod of the cylinder 10. A circulating air pump 11 is fixedly installed inside the mounting pipe 2. The air outlet of the cylinder 10 is connected to the air inlet of the circulating air pump 11 through a purification pipeline, and the air outlet of the circulating air pump 11 is connected to the air inlet of the cylinder 10 through a high-pressure air pipe. Water first enters the mounting pipe 2. The filter frame 4 inside the mounting pipe 2 rotates continuously under the drive of the drive wheel 6. When the water flows through the rotating filter frame 4, larger impurity particles are intercepted on its surface. The scraper 7, which is in close contact with the surface of the filter frame 4, is in a stationary state. As the filter frame 4 rotates at a uniform speed, the scraper 7 continuously scrapes the surface of the filter frame 4 to prevent impurities from accumulating and clogging, thus maintaining its filtration efficiency. The impurities scraped off by the scraper 7 and some of the intercepted impurities fall into the discharge pipe 12 below under the action of gravity or water flow. The opening and closing plates 15 inside the discharge pipe 12 are controlled by a linkage mechanism consisting of the mounting ring 13, the second gear ring 14, and the third gear 17 on the mounting shaft 16. When slag discharge is required, the motor in the discharge pipe 12 drives a set of mounting shafts 16 to rotate, which, in conjunction with the second gear ring 14 and the third gear 17, enables the synchronous rotation and opening of multiple sets of opening and closing plates 15, allowing impurities to be discharged through the discharge pipe 12. After slag discharge is completed, the opening and closing plates 15 close synchronously, restoring the sealed state.This process enables automatic collection and discharge of impurities without stopping the machine. Cylinder 10 pushes the first rack 9 to move, which in turn drives the first gear 8, coaxial with the scraper 7, to rotate, thereby adjusting the angle of the scraper 7. This facilitates cleaning or inspection of the scraper 7 during maintenance. The compressed air generated by the operation of cylinder 10 can be pressurized through a purification pipeline via circulating air pump 11 and then resupplyed to the air inlet of cylinder 10, forming a cycle of compressed air.

[0016] like Figures 6-8As shown, a lead screw 20 is rotatably installed inside the mounting frame 18. The lead screw 20 passes through two sets of movable frames 19 and is threadedly connected to each set of movable frames 19. Each set of movable frames 19 has two sets of symmetrically distributed slots 21. Two sets of retaining frames 22 are correspondingly arranged with the slots 21. Each set of retaining frames 22 is movably engaged with the corresponding movable frame 19 through the corresponding slots 21. A telescopic tube 23 is provided between each set of retaining frames 22 and the mounting frame 18. The two ends of the telescopic tube 23 are fixedly connected to the retaining frame 22 and the mounting frame 18, respectively. A bidirectional screw 24 is rotatably installed inside the mounting frame 18. The two ends of the bidirectional screw 24 pass through two sets of retaining frames 22 and are threadedly connected to each set of retaining frames 22, respectively. Two movable frames 19 are slidably installed inside the movable frames 19. Two sets of symmetrically distributed slides 26 are provided, each with a fixed insert rod 27. Each insert rod 27 is movably engaged with a filter screen frame 25. A spring 28 is fitted onto each insert rod 27, with both ends of the spring 28 fixedly connected to the insert rod 27 and a movable frame 19, respectively. A second rack 29 is fixedly installed on each slide 26, and a second gear 30 is provided between each set of second racks 29. The second gear 30 is rotatably connected to the movable frame 19 via a mounting rod 31, meshing with each of the two sets of second racks 29. A torsion spring 32 is fitted onto the mounting rod 31, with both ends of the torsion spring 32 fixedly connected to the second gear 30 and the movable frame 19, respectively. Water that has undergone primary filtration enters the mounting frame 18. The water must then pass sequentially through the filter screen frames 25 installed within the two sets of movable frames 19 for further fine filtration, removing smaller impurities and significantly improving the scale inhibition rate. The finely filtered water finally enters the heat exchanger 1 body through inlet 3. When a filter screen 25 needs cleaning or replacement, the motor-driven bidirectional screw 24 in the mounting bracket 18 rotates, driving the two sets of retaining frames 22 to move away from each other, releasing the constraint on the corresponding movable frame 19. At the same time, the motor-driven lead screw 20 in the mounting bracket 18 rotates, driving the two sets of movable frames 19 to slide within the mounting bracket 18, so that the movable frame 19 requiring maintenance, along with its filter screen 25, is moved out of the working area, while the other... The movable frame 19 with the clean filter screen holder 25 slides into the working position. After the movable frame 19 is moved out, the slide 26 inside is operated to rotate the mounting rod 31, which drives the second gear 30 to rotate. In conjunction with the two sets of second racks 29, the two sets of slides 26 drive the two sets of insertion rods 27 to retract against the force of the spring 28. The old filter screen holder 25 can then be taken out and the new filter screen holder 25 can be installed. After releasing the mounting rod 31, the slide 26 is released, and the insertion rods 27 pop out under the action of the spring 28, locking the filter screen holder 25 to complete the fixation.

[0017] This utility model provides a shell-and-tube heat exchanger heating device, the specific working principle of which is as follows: Water first enters the mounting pipe 2. The filter frame 4 inside the mounting pipe 2 rotates continuously under the drive of the drive wheel 6. When the water flows through the rotating filter frame 4, larger impurity particles are intercepted on its surface. The scraper 7, which is in close contact with the surface of the filter frame 4, is in a stationary state. As the filter frame 4 rotates at a uniform speed, the scraper 7 continuously scrapes the surface of the filter frame 4 to prevent impurities from accumulating and clogging, thus maintaining its filtration efficiency. The impurities scraped off by the scraper 7, as well as some of the intercepted impurities, fall into the discharge pipe 12 below under the action of gravity or water flow. The opening and closing plates 15 inside the discharge pipe 12 are controlled by a linkage mechanism consisting of the mounting ring 13, the second toothed ring 14, and the third gear 17 on the mounting shaft 16. When slag discharge is required, the motor in the discharge pipe 12 drives a set of mounting shafts 16 to rotate, which, together with the second toothed ring 14 and the third gear 17, enables the synchronous rotation and opening of multiple sets of opening and closing plates 15, and the impurities are discharged through the discharge pipe 12. After slag discharge is completed, the opening and closing plate 15 closes simultaneously, restoring the sealed state. This process achieves automatic collection and discharge of impurities without stopping the machine. The cylinder 10 pushes the first rack 9 to move, driving the first gear 8, which is coaxial with the scraper 7, to rotate, thereby adjusting the angle of the scraper 7. This facilitates cleaning or inspection of the scraper 7 during maintenance. The compressed air generated by the cylinder 10 can be pressurized through the purification pipeline via the circulating air pump 11 and then resupply to the air inlet of the cylinder 10, forming a cycle of compressed air. The water that has passed through the primary filter enters the mounting frame 18. The water must then pass through the filter screen frame 25 installed in the two sets of moving frames 19 for finer filtration, further removing smaller impurity particles and significantly improving the scale inhibition rate. The finely filtered water finally enters the heat exchanger 1 body through inlet 3. When a filter screen 25 needs cleaning or replacement, the motor-driven bidirectional screw 24 in the mounting bracket 18 rotates, driving the two sets of retaining frames 22 to move away from each other, releasing the constraint on the corresponding movable frame 19. At the same time, the motor-driven lead screw 20 in the mounting bracket 18 rotates, driving the two sets of movable frames 19 to slide within the mounting bracket 18, so that the movable frame 19 requiring maintenance, along with its filter screen 25, is moved out of the working area, while the other... The movable frame 19 with the clean filter screen holder 25 slides into the working position. After the movable frame 19 is moved out, the slide 26 inside is operated to rotate the mounting rod 31, which drives the second gear 30 to rotate. In conjunction with the two sets of second racks 29, the two sets of slides 26 drive the two sets of insertion rods 27 to retract against the force of the spring 28. The old filter screen holder 25 can then be taken out and the new filter screen holder 25 can be installed. After releasing the mounting rod 31, the slide 26 is released, and the insertion rods 27 pop out under the action of the spring 28, locking the filter screen holder 25 to complete the fixation.

[0018] 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 shell-and-tube heat exchanger heating device, comprising an exchanger (1), characterized in that: An inlet (3) is fixedly installed on the exchanger (1). An mounting bracket (18) and a mounting pipe (2) are fixedly installed on the exchanger (1). The mounting bracket (18) is located between the mounting pipe (2) and the inlet (3). The mounting bracket (18) is connected to the mounting pipe (2) and the inlet (3). A filter frame (4) is rotatably installed inside the mounting pipe (2). A first toothed ring (5) is sleeved on the filter frame (4). A drive wheel (6) is rotatably installed inside the mounting pipe (2). The drive wheel (6) is meshed with the first toothed ring (5). A scraper (7) is rotatably installed on the mounting pipe (2). The scraper (7) is fitted against the surface of the filter frame (4). A discharge pipe (12) is fixedly installed inside the mounting pipe (2). A mounting bracket (13) is rotatably installed inside the discharge pipe (12). Mounting ring (13), filter frame (4) is rotatably connected to discharge pipe (12), second toothed ring (14) is sleeved on mounting ring (13), multiple sets of annularly distributed opening and closing plates (15) are provided in discharge pipe (12), multiple sets of opening and closing plates (15) are rotatably connected to discharge pipe (12) through mounting shaft (16), multiple sets of mounting shaft (16) are annularly distributed on the outside of mounting ring (13), multiple sets of mounting shaft (16) are sleeved with third gear (17), multiple sets of third gear (17) are meshed with second toothed ring (14), two sets of movable frames (19) are slidably installed in mounting frame (18), filter screen frame (25) is clamped in both sets of movable frames (19), and two sets of symmetrically distributed clamping frames (22) are slidably installed in mounting frame (18).

2. The shell-and-tube heat exchanger heating device according to claim 1, characterized in that: The scraper (7) is fitted with a first gear (8), and a first rack (9) is slidably installed in the mounting tube (2). The first rack (9) meshes with the first gear (8). A cylinder (10) is fixedly installed in the mounting tube (2). The first rack (9) is fixedly connected to the output end of the piston rod of the cylinder (10). A circulating air pump (11) is fixedly installed in the mounting tube (2). The air outlet of the cylinder (10) is connected to the air inlet of the circulating air pump (11) through a purification pipeline. The air outlet of the circulating air pump (11) is connected to the air inlet of the cylinder (10) through a high-pressure air pipe.

3. The shell-and-tube heat exchanger heating device according to claim 1, characterized in that: A lead screw (20) is rotatably installed inside the mounting bracket (18). The lead screw (20) passes through two sets of movable brackets (19) and is threadedly connected to the two sets of movable brackets (19). Two sets of symmetrically distributed slots (21) are provided on each set of movable brackets (19). Two sets of locking frames (22) are correspondingly set with the locking slots (21). The two sets of locking frames (22) are movably locked with the corresponding movable brackets (19) through the corresponding locking slots (21).

4. The shell-and-tube heat exchanger heating device according to claim 1, characterized in that: Telescopic tubes (23) are provided between the two sets of card frames (22) and the mounting bracket (18). The two ends of the telescopic tubes (23) are fixedly connected to the card frames (22) and the mounting bracket (18) respectively. A bidirectional screw (24) is rotatably installed inside the mounting bracket (18). The two ends of the bidirectional screw (24) pass through the two sets of card frames (22) respectively and are threadedly connected to the two sets of card frames (22) respectively.

5. The shell-and-tube heat exchanger heating device according to claim 1, characterized in that: Two sets of symmetrically distributed slides (26) are slidably installed inside the movable frame (19). Each set of slides (26) is fixedly installed with a rod (27). Each set of rods (27) is movably engaged with the filter frame (25). Each set of rods (27) is fitted with a spring (28). The two ends of the spring (28) are fixedly connected to the rod (27) and the movable frame (19) respectively. Each set of slides (26) is fixedly installed with a second rack (29). A second gear (30) is provided between each set of second racks (29).

6. The shell-and-tube heat exchanger heating device according to claim 5, characterized in that: The second gear (30) is rotatably connected to the movable frame (19) via the mounting rod (31). The second gear (30) is meshed with two sets of second racks (29). A torsion spring (32) is sleeved on the mounting rod (31). The two ends of the torsion spring (32) are fixedly connected to the second gear (30) and the movable frame (19) respectively.

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