Boiler waste heat utilization device

Abstract

The utility model relates to the technical field of boiler waste heat utilization, and discloses a boiler waste heat utilization device which comprises a recovery filter box, a smoke inlet pipe is connected to the middle of the front end of the recovery filter box, and an exhaust fan is installed at an air outlet in the rear end of the recovery filter box. The end, away from the recovery filter box, of the exhaust fan is connected with an air conveying pipe, a dust filtering assembly is arranged in the recovery filter box, the dust filtering assembly is provided with a plurality of mounting frames, driven racks and cleaning motors, and the driven racks are fixedly mounted at the top ends of the mounting frames; through the dust filtering assembly, smoke dust on a dust filtering screen plate can be conveniently cleaned, the dust filtering screen plate can be moved to the outside of the recovery filtering box, so that personnel can conveniently observe the cleaning condition of the dust filtering screen plate, maintenance and replacement are facilitated, the smoke dust at the dust filtering screen plate is conveniently vibrated down, the situation that a large amount of smoke dust is accumulated in the recovery filtering box is avoided, and the frequency of disassembly and cleaning by personnel is reduced; and the cleaning efficiency is conveniently improved.

Description

Technical Field

[0001] This utility model relates to the field of boiler waste heat utilization technology, specifically a boiler waste heat utilization device. Background Technology

[0002] A boiler is an energy conversion device. The energy input to a boiler includes the chemical energy of fuel and electrical energy. The boiler outputs steam, high-temperature or organic heat carriers with a certain amount of thermal energy. After the boiler burns fuels such as coal and natural gas, the flue gas contains a large amount of sensible heat and latent heat. Waste heat utilization of boilers is the recovery and reuse of this heat. The recovered heat can be used to heat low-temperature media, which has the effect of saving fuel and conserving energy.

[0003] Chinese patent provides a boiler waste heat utilization device, publication number CN221359048U, which includes a filter box, an air inlet pipe, an air outlet pipe, a fan, and a heating box. The air inlet pipe and the air outlet pipe are respectively arranged at both ends of the filter box. A fan is arranged between the air outlet pipe and the heating box. Several filter plates are arranged in the inner cavity of the filter box.

[0004] The above-mentioned device achieves the self-cleaning effect of the filter plates by setting a cleaning component on the front side of several filter plates. It eliminates the need for manual operation or frequent shutdowns for cleaning, effectively cleaning the impurities and dust accumulated on the filter plates, maintaining the high efficiency of the filter plates and improving work efficiency.

[0005] However, when the above-mentioned waste heat is utilized, multiple dust collection boxes are used in conjunction with screens to treat the flue gas and recover the dust. However, the structure is relatively simple. During recovery, only the dust on the surface of the filter screen can be extracted, making it difficult to remove the dust with strong adhesion. In addition, the screen is installed inside the filter box, making maintenance and replacement difficult and affecting maintenance efficiency. Utility Model Content

[0006] The purpose of this invention is to provide a boiler waste heat utilization device that can effectively solve the problems in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A boiler waste heat utilization device includes a recovery filter box, a flue gas inlet pipe connected to the front center of the recovery filter box, an exhaust fan installed at the rear outlet of the recovery filter box, and an air supply pipe connected to the end of the exhaust fan away from the recovery filter box. A dust filter assembly is installed inside the recovery filter box.

[0009] The dust filtration assembly has several mounting frames, a driven rack, and a cleaning motor. The driven rack is fixedly installed on the top of the mounting frame. The inside of the recovery filter box has a mounting groove that adapts to the mounting frame, and the mounting frame is movably installed inside the recovery filter box through the mounting groove. The cleaning motor is mounted on the top of the recovery filter box through a mounting plate. The end of the drive shaft of the cleaning motor is connected to a drive gear that meshes with the cleaning motor. A dust filter plate is mounted on the end of the mounting frame near the flue gas inlet pipe through mounting bolts. The drive shaft transmission rod of the cleaning motor is connected to a cleaning brush.

[0010] Preferably, the drive shaft of the cleaning motor is meshed with the mounting frame via a drive gear and the cleaning motor, and a sealing strip is provided at the connection between the mounting frame and the mounting groove.

[0011] Preferably, a dust collection port is provided inside the recycling filter box and at the lower front end of each mounting frame, and one side of several dust collection ports is connected to the same suction pipe.

[0012] Preferably, a plurality of cam motors are installed on one side of the recycling filter box and in front of each mounting frame, and the drive shaft of the cam motor is fixedly connected to a cam rod through one side of the recycling filter box.

[0013] Preferably, the outer ring of the cam rod is provided with a plurality of cam blocks that are adapted to the dust filter plate, and the connection between the drive shaft of the cam motor and the recycling filter box is provided with a bearing, and the drive shaft of the cam motor is rotatably connected to the recycling filter box through the bearing.

[0014] Preferably, the length of the driven rack is greater than the length of the recycling filter box, the dust filter plate and the front end of the mounting frame are on the same vertical line, the outer ring of the cleaning brush cylinder is in contact with the front end of the dust filter plate, and the dust filter plate and the cleaning brush cylinder are movably connected, and the cleaning brush cylinder does not contact the cam rod.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This utility model incorporates a dust filtration assembly in conjunction with a recycling filter box. The dust filter plate, mounting frame, cleaning motor, and cleaning brush work together to clean the filtered dust. The continuous rotation of the cleaning brush, combined with the outward movement of the dust filter plate, facilitates the cleaning of the dust on the filter plate. Simultaneously, the dust filter plate can be moved outside the recycling filter box for personnel to observe its cleaning status and facilitate maintenance and replacement.

[0017] By setting up a cam rod, cam motor, suction pipe, and dust collection port to work together, the dust filter can be struck during dust filtration, making it easier to shake off the dust on the filter screen. The dust collected at the dust collection port can also be sucked up, preventing it from accumulating in the inside of the recycling filter box. This reduces the frequency of manual disassembly and cleaning, and improves cleaning efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a boiler waste heat utilization device according to an embodiment of the present utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the mounting frame and dust filter plate in an embodiment of this utility model;

[0020] Figure 3 This is a top view of the structure of the recycling filter box, cam motor, and cleaning motor in the embodiment of this utility model;

[0021] Figure 4 This is a cross-sectional view of the internal structure of the recycling filter box in an embodiment of this utility model.

[0022] In the diagram: 1. Recycling filter box; 2. Flue gas inlet pipe; 3. Exhaust fan; 4. Gas delivery pipe; 5. Dust filter assembly; 6. Mounting frame; 7. Mounting slot; 8. Dust filter screen; 9. Mounting bolt; 10. Driven rack; 11. Cleaning motor; 12. Drive gear; 13. Cleaning brush; 14. Smoke and dust collection port; 15. Suction pipe; 16. Sealing strip; 17. Cam motor. Detailed Implementation

[0023] 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.

[0024] Example 1

[0025] Combination Figures 1-4 A boiler waste heat utilization device includes a recovery filter box 1, a flue gas inlet pipe 2 connected to the front center of the recovery filter box 1, an exhaust fan 3 installed at the rear outlet of the recovery filter box 1, and an exhaust pipe 4 connected to the end of the exhaust fan 3 away from the recovery filter box 1. A dust filter assembly 5 is installed inside the recovery filter box 1.

[0026] See Figure 2 and Figure 4Furthermore, the dust filter assembly 5 has several mounting frames 6, driven racks 10, and cleaning motors 11. The driven racks 10 are fixedly installed on the top of the mounting frames 6. The interior of the recovery filter box 1 is provided with mounting grooves 7 that are compatible with the mounting frames 6, and the mounting frames 6 are movably installed inside the recovery filter box 1 through the mounting grooves 7. The cleaning motor 11 is installed on the top of the recovery filter box 1 through a mounting plate. The end of the drive shaft of the cleaning motor 11 is connected to a drive gear 12 that meshes with the cleaning motor 11. The end of the mounting frame 6 near the flue gas inlet pipe 2 is equipped with a dust filter plate 8 through mounting bolts 9. The drive shaft transmission rod of the cleaning motor 11 is connected to a cleaning brush cylinder 13. The drive shaft of the cleaning motor 11 is meshed with the mounting frame 6 through the drive gear 12 and the cleaning motor 11. A sealing strip 16 is provided at the connection between the mounting frame 6 and the mounting groove 7. A dust collection port 14 is provided inside the recovery filter box 1 and at the lower front end of each mounting frame 6. The same suction pipe 15 is connected to one side of several dust collection ports 14.

[0027] Specifically, multiple dust filter plates 8 are installed inside the recovery filter box 1. When flue gas enters through the flue gas inlet pipe 2, they can filter impurities contained in the flue gas. When cleaning of the flue gas is required, the suction pipe 15 can be pre-connected to the flue gas suction port of the external ash pump to generate continuous suction. Then, the cleaning motor 11 can be started. The rotation of the drive shaft of the cleaning motor 11 can drive the drive gear 12 to rotate. Through the meshing transmission of the drive gear 12, the dust filter plates 8 can be driven away from the interior of the recovery filter box 1. The cleaning motor 11 moves in a certain direction, and the drive shaft of the cleaning motor 11 is connected to the cleaning brush cylinder 13. At the same time, the outer ring of the cleaning brush cylinder 13 is in contact with the air-facing surface of the dust filter plate 8. Thus, when the dust filter plate 8 moves, most of the dust adhering to the dust filter plate 8 can be brushed off by the continuous rotation of the cleaning brush cylinder 13. Subsequently, most of the dust is extracted and recycled into the interior of the recycling filter box 1 through the dust collection port 14. In this way, the dust filter plate 8 can be removed from the recycling filter box 1 so that personnel can observe the condition of the dust filter plate 8.

[0028] Example 2

[0029] See Figure 3 and Figure 4Furthermore, based on Embodiment 1, a plurality of cam motors 17 are installed on one side of the recycling filter box 1 and in front of each mounting frame 6. The drive shaft of the cam motor 17 passes through one side of the recycling filter box 1 and is fixedly connected to a cam rod. The outer ring of the cam rod is provided with a plurality of cam blocks that are adaptively matched with the dust filter plate 8. A bearing is provided at the connection between the drive shaft of the cam motor 17 and the recycling filter box 1, and the drive shaft of the cam motor 17 is rotatably connected to the recycling filter box 1 through the bearing. The length of the driven rack 10 is greater than the length of the recycling filter box 1. The dust filter plate 8 and the front end of the mounting frame 6 are on the same vertical line. The outer ring of the cleaning brush cylinder 13 is in contact with the front end of the dust filter plate 8, and the dust filter plate 8 and the cleaning brush cylinder 13 are movably connected. The cleaning brush cylinder 13 does not contact the cam rod.

[0030] Specifically, when the dust filter plate 8 is filtering the dust normally, the cam motor 17 can be started intermittently. In conjunction with the start of the cam motor 17, the external dust pump can be turned on. The rotation of the drive shaft of the cam motor 17 can drive the cam rod to rotate. By having several cams on the cam rod strike the dust filter plate 8, most of the dust blocked on it can be shaken off. At this time, the suction force generated by the external dust pump can be used to recover the dust without manual or frequent disassembly and maintenance.

[0031] In actual operation, multiple dust filter plates 8 are placed inside the recycling filter box 1. When the flue gas enters through the flue gas inlet pipe 2, the impurities contained in the flue gas can be filtered. When it is necessary to clean the dust, the dust suction pipe 15 can be connected to the dust suction port of the external ash pump in advance to generate continuous suction. Then the cleaning motor 11 can be started. The drive shaft of the cleaning motor 11 rotates, which drives the drive gear 12 to rotate. Through the meshing transmission of the drive gear 12, the dust filter plates 8 can be moved away from the interior of the recycling filter box 1.

[0032] Furthermore, the drive shaft of the cleaning motor 11 is connected to the cleaning brush cylinder 13, and the outer ring of the cleaning brush cylinder 13 is in contact with the air-facing surface of the dust filter plate 8. Thus, when the dust filter plate 8 moves, most of the dust adhering to the dust filter plate 8 can be brushed off by the continuous rotation of the cleaning brush cylinder 13. Subsequently, most of the dust is extracted and recycled into the interior of the filter box 1 through the dust collection port 14. In this way, the dust filter plate 8 can be removed from the recycling filter box 1 so that personnel can observe the condition of the dust filter plate 8 and perform maintenance and replacement as needed. The process does not require complete disassembly, thus increasing the frequency of maintenance and cleaning.

[0033] When the dust filter plate 8 is filtering the dust normally, the cam motor 17 can be started intermittently. The start of the cam motor 17 can also turn on the external dust pump. The rotation of the drive shaft of the cam motor 17 can drive the cam rod to rotate. The cam rod strikes the dust filter plate 8, shaking off most of the dust blocked on it. At this time, the suction force generated by the external dust pump can be used to recover the dust without manual or frequent disassembly and maintenance.

[0034] Furthermore, the control components and modules used in the cleaning motor 11, cam motor 17, and exhaust fan 3 are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this utility model does not involve any improvement to the software and methods.

[0035] 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 the 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 boiler waste heat recovery device, characterized in that: The system includes a recycling filter box (1), with a flue gas inlet pipe (2) connected to the center of the front end of the recycling filter box (1), an exhaust fan (3) installed at the rear outlet of the recycling filter box (1), and an air supply pipe (4) connected to the end of the exhaust fan (3) away from the recycling filter box (1). A dust filter assembly (5) is installed inside the recycling filter box (1). The dust filter assembly (5) has several mounting frames (6), driven racks (10), and cleaning motors (11). The driven racks (10) are fixedly installed on the top of the mounting frames (6). The inside of the recycling filter box (1) is provided with mounting slots (7) that are compatible with the mounting frames (6), and the mounting frames (6) are movably installed inside the recycling filter box (1) through the mounting slots (7). The top of the recycling filter box (1) is equipped with a cleaning motor (11) through a mounting plate. The end of the drive shaft of the cleaning motor (11) is connected to a drive gear (12) that meshes with the cleaning motor (11). The end of the mounting frame (6) near the flue gas inlet pipe (2) is equipped with a dust filter plate (8) through mounting bolts (9). The drive shaft transmission rod of the cleaning motor (11) is connected to a cleaning brush cylinder (13).

2. The boiler waste heat utilization device according to claim 1, characterized in that: The drive shaft of the cleaning motor (11) is connected to the mounting frame (6) via the drive gear (12) and the cleaning motor (11). A sealing strip (16) is provided at the connection between the mounting frame (6) and the mounting groove (7).

3. The boiler waste heat utilization device according to claim 1, characterized in that: The recycling filter box (1) is provided with a dust collection port (14) located inside and at the lower front end of each mounting frame (6), and one side of several dust collection ports (14) is connected to the same suction pipe (15).

4. The boiler waste heat utilization device according to claim 1, characterized in that: A plurality of cam motors (17) are installed on one side of the recycling filter box (1) and in front of each mounting frame (6). The drive shaft of the cam motor (17) passes through one side of the recycling filter box (1) and is fixedly connected to a cam rod.

5. A boiler waste heat utilization device according to claim 4, characterized in that: The outer ring of the cam rod is provided with several cam blocks that are adapted to the dust filter plate (8). The drive shaft of the cam motor (17) is provided with a bearing at the connection between it and the recycling filter box (1). The drive shaft of the cam motor (17) is rotatably connected to the recycling filter box (1) through the bearing.

6. A boiler waste heat utilization device according to claim 4, characterized in that: The length of the driven rack (10) is greater than the length of the recycling filter box (1). The front end of the dust filter plate (8) and the mounting frame (6) are on the same vertical line. The outer ring of the cleaning brush cylinder (13) is in contact with the front end of the dust filter plate (8). The dust filter plate (8) and the cleaning brush cylinder (13) are movably connected. The cleaning brush cylinder (13) does not contact the cam rod.

Images