Boiler flue gas waste heat recycling device

Abstract

The utility model discloses a boiler flue gas waste heat recycling device which comprises a flue gas pipe and a flue gas inlet pipe, a connecting pipe is rotatably connected between the flue gas pipe and the flue gas inlet pipe, a filter screen for filtering impurities in flue gas is arranged in the flue gas inlet pipe, a cleaning assembly for cleaning the filter screen is arranged on the connecting pipe, and the cleaning assembly is connected with the flue gas pipe. The sweeping assembly comprises sweeping fan blades, an outer gear ring and a driving assembly, the driving assembly is arranged on the side face of the smoke inlet pipe, the sweeping fan blades are fixed to the inner wall of the connecting pipe, and one sides of the sweeping fan blades are attached to the surface of the filter screen. By arranging the filter screen, the filter screen can effectively filter impurities in flue gas, the phenomenon that the impurities enter the air pump to damage the air pump is avoided, the effect of filtering the impurities in the flue gas is achieved, and the phenomenon that the service life of the air pump is affected by the impurities is avoided; the problem that an air pump is damaged due to the fact that a large number of impurities exist in smoke generated when a boiler is heated through traditional fuel is solved.

Description

Technical Field

[0001] This utility model relates to the field of boiler technology, and in particular to a boiler flue gas waste heat recovery and utilization device. Background Technology

[0002] A boiler is a heating device used to produce hot water or steam. Generally, boilers are fueled by coal, oil, and natural gas. With the development of technology, electricity is gradually being used as a new type of heat source. By heating the boiler with fuel or electricity, the water is brought to a high temperature to meet different uses.

[0003] Traditional fuel-heated boilers produce flue gas. Since this flue gas is still very hot when it exits the exhaust pipe, heat recovery is necessary, which is the purpose of a flue gas waste heat recovery device. A search revealed Chinese patent CN219913121U, entitled "A Boiler Flue Gas Waste Heat Recovery Device." This patent provides a device that separates flue gas bubbles into multiple smaller bubbles, increasing the contact area and time between the flue gas and water, improving heat exchange efficiency, and promoting waste heat recovery, thus solving the problems mentioned in the background technology. However, research has found that traditional fuel combustion produces a large number of impurities in the flue gas. This solution directly connects the flue gas to an air pump, which draws the flue gas, causing impurities to pass through the pump and damage it, severely affecting its lifespan.

[0004] Therefore, how to provide a boiler flue gas waste heat recovery and utilization device is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] One objective of this invention is to provide a waste heat recovery and utilization device for boiler flue gas. This invention solves the problem that the presence of a large number of impurities in the flue gas generated by boilers heated by traditional fuels can cause damage to the air pump.

[0006] A boiler flue gas waste heat recovery and utilization device according to an embodiment of the present utility model includes a flue gas pipe and a flue gas inlet pipe. A connecting pipe is rotatably connected between the flue gas pipe and the flue gas inlet pipe. A filter screen for filtering impurities in the flue gas is provided inside the flue gas inlet pipe.

[0007] The connecting pipe is equipped with a cleaning component for cleaning the filter screen.

[0008] The cleaning assembly includes a cleaning fan blade, an external gear ring, and a drive assembly. The drive assembly is located on the side of the smoke inlet pipe, the cleaning fan blade is fixed to the inner wall of the connecting pipe, one side of the cleaning fan blade is attached to the surface of the filter screen, the external gear ring is fixed to the side of the connecting pipe, and the drive assembly meshes with the external gear ring.

[0009] The cleaning fan blade is fixed with a central shaft at the end away from the connecting pipe, and the central shaft is also attached to the surface of the filter screen.

[0010] The drive assembly includes a drive motor and a drive gear. The drive motor is fixed on the side of the smoke inlet pipe, and the drive gear is fixedly sleeved on the surface of the output shaft of the drive motor. The drive gear meshes with the external gear ring.

[0011] The side of the connecting pipe is provided with a collection component for collecting the contents.

[0012] The collection assembly includes an outlet, a top connecting plate, a bottom connecting plate, a side collection ring, and a positioning component. The outlet is located on the side of the connecting pipe corresponding to the position of the cleaning fan blade. The cleaning fan blade has an "L" design. The top connecting plate and the bottom connecting plate are respectively fixed to the side of the connecting pipe at the top and bottom positions of the outlet. The side collection ring is movably sleeved on the side of the bottom connecting plate and fits against the surface of the top connecting plate. The positioning component is located on the side of the bottom connecting plate away from the top connecting plate and is movably engaged with the surface of the side collection ring.

[0013] The positioning assembly includes a positioning screw, a positioning sleeve, and a positioning nut. The positioning screw is fixed on the side of the bottom connecting plate away from the top connecting plate. The positioning sleeve is movably sleeved on the surface of the positioning screw. One side of the positioning sleeve is engaged with the end face of the side collecting ring. The positioning nut is threaded onto the surface of the positioning screw to limit the positioning sleeve.

[0014] The beneficial effects of this utility model are:

[0015] By installing a filter screen, impurities in the flue gas can be effectively filtered out, preventing impurities from entering the air pump and causing damage. This achieves the effect of filtering impurities in the flue gas, avoiding impurities from affecting the service life of the air pump, and solving the problem that a large number of impurities in the flue gas generated by boilers heated by traditional fuels can cause air pump damage.

[0016] By setting up a cleaning component, the rotating component cleans the impurities on the filter screen, preventing impurities from clogging the filter screen and affecting its use, thus achieving the effect of cleaning the filter screen and preventing impurities from clogging it.

[0017] By setting up a collection component, the centrifugal force generated by the rotation of the cleaning component during the cleaning process allows the collection component to reach its position, thus achieving the purpose of effectively collecting the waste. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0019] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a boiler flue gas waste heat recovery and utilization device proposed in this utility model.

[0020] Figure 2 This is a cross-sectional three-dimensional structural diagram of the cleaning component position in a boiler flue gas waste heat recovery and utilization device proposed in this utility model.

[0021] Figure 3 This is a three-dimensional cross-sectional structural diagram of the collection component location in a boiler flue gas waste heat recovery and utilization device proposed in this utility model.

[0022] The attached diagram shows: 1. Smoke pipe; 2. Smoke inlet pipe; 3. Connecting pipe; 4. Filter screen; 5. Cleaning assembly; 6. Cleaning fan blade; 7. External gear ring; 8. Drive assembly; 9. Central shaft; 10. Drive motor; 11. Drive gear; 12. Collection assembly; 13. Exhaust port; 14. Top connecting plate; 15. Bottom connecting plate; 16. Side collection ring; 17. Positioning assembly; 18. Positioning screw; 19. Positioning sleeve; 20. Positioning nut. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0024] Example 1

[0025] refer to Figure 1-3 In this embodiment, it includes a flue pipe 1 and a smoke inlet pipe 2. A connecting pipe 3 is rotatably connected between the flue pipe 1 and the smoke inlet pipe 2. A filter screen 4 is installed inside the smoke inlet pipe 2 to filter impurities in the flue gas. During operation, an external air pump is activated to draw in air, allowing the flue gas to pass through the flue pipe 1 and the connecting pipe 3 to reach the smoke inlet pipe 2. The filter screen 4 in the smoke inlet pipe 2 filters out impurities, and the filtered flue gas then passes through the smoke inlet pipe 2 to reach the air pump. This prevents impurities in the flue gas from entering the air pump and causing damage. It should be noted that the smoke inlet pipe 2... Figure 1 The settings are as shown, and filter 4 is in a horizontal position.

[0026] Example 2

[0027] refer to Figure 1-3In this embodiment, a cleaning assembly 5 for cleaning the filter screen 4 is provided on the connecting pipe 3. The cleaning assembly 5 is located below the filter screen 4 and includes a cleaning fan blade 6, an external gear ring 7, and a drive assembly 8. The drive assembly 8 is located on the side of the smoke inlet pipe 2. The cleaning fan blade 6 is fixed to the inner wall of the connecting pipe 3, and one side of the cleaning fan blade 6 is attached to the surface of the filter screen 4. The external gear ring 7 is fixed to the side of the connecting pipe 3. The drive assembly 8 meshes with the external gear ring 7. The drive assembly 8 includes a drive motor 10 and a drive gear 11. The drive motor 10 is fixed to the side of the smoke inlet pipe 2, and the drive gear 11 is fixedly sleeved on the output shaft of the drive motor 10. On the surface of the filter screen 4, the drive gear 11 meshes with the outer gear ring 7. During operation, when a large amount of impurities adhere to the filter screen 4, the drive component 8 in the cleaning component 5 is activated. This causes the drive motor 10 in the drive component 8 to start rotating. The drive motor 10 drives the drive gear 11 to rotate, which in turn drives the outer gear ring 7 to rotate. The rotation of the outer gear ring 7 causes the connecting pipe 3 to rotate on the flue pipe 1 and the smoke inlet pipe 2. The rotation of the connecting pipe 3 drives the cleaning fan blade 6 to rotate. The cleaning fan blade 6 scrapes the surface of the filter screen 4, thereby effectively filtering the impurities on the surface of the filter screen 4 and preventing the filter screen 4 from becoming clogged due to excessive impurities.

[0028] Example 3

[0029] refer to Figure 1-3In this embodiment, a collection assembly 12 for collecting the filter is provided on the side of the connecting pipe 3. The collection assembly 12 includes an outlet 13, a top connecting plate 14, a bottom connecting plate 15, a side collection ring 16, and a positioning assembly 17. The outlet 13 is located on the side of the connecting pipe 3 corresponding to the cleaning fan blade 6. The cleaning fan blade 6 has an "L" design. A central shaft 9 is fixed to the end of the cleaning fan blade 6 away from the connecting pipe 3. The central shaft 9 is also attached to the surface of the filter screen 4. The top connecting plate 14 and the bottom connecting plate 15 are respectively fixed to the side of the connecting pipe 3. At the top and bottom positions of the discharge port 13, a side collecting ring 16 is movably sleeved on the side of the bottom connecting plate 15, and the side collecting ring 16 is attached to the surface of the top connecting plate 14. A positioning component 17 is disposed on the side of the bottom connecting plate 15 away from the top connecting plate 14. The positioning component 17 is movably engaged with the surface of the side collecting ring 16. The positioning component 17 includes a positioning screw 18, a positioning sleeve 19, and a positioning nut 20. The positioning screw 18 is fixed on the side of the bottom connecting plate 15 away from the top connecting plate 14, and the positioning sleeve 19 is movably sleeved on the surface of the positioning screw 18. On one side, the positioning sleeve 19 is engaged with the end face of the side collecting ring 16. The positioning nut 20 is threaded onto the surface of the positioning screw 18 to limit the positioning sleeve 19. During operation, the cleaning assembly 5 needs to be started first. When the cleaning assembly 5 is in operation, the cleaning fan blade 6 rotates, which will cause the cleaned impurities to rotate. The impurities move outward by centrifugal force and enter the space between the side collecting ring 16, the bottom connecting plate 15 and the top connecting plate 14 through the discharge port 13. After the cleaning assembly 5 and the air pump are stopped, the positioning nut 20 is rotated to move it from the positioning screw 18. Remove the top, then move the positioning sleeve 19 to rotate around the positioning screw 18 to a position away from the side collection ring 16. Then move the side collection ring 16 away from the top connecting plate 14. After the side collection ring 16 moves, the impurities at the position of the side collection ring 16 can be exposed, thereby cleaning the impurities at the position of the side collection ring 16, so as to achieve the effect of collecting and cleaning the swept impurities. It should be noted that the connection positions between the top connecting plate 14, the bottom connecting plate 15 and the side collection ring 16 are all provided with sealing strips for sealing.

[0030] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A boiler flue gas waste heat recovery and utilization device, characterized in that, It includes a flue pipe (1) and a smoke inlet pipe (2), with a connecting pipe (3) rotatably connected between the flue pipe (1) and the smoke inlet pipe (2), and a filter screen (4) is provided inside the smoke inlet pipe (2) to filter impurities in the flue gas.

2. The boiler flue gas waste heat recovery and utilization device according to claim 1, characterized in that, The connecting pipe (3) is provided with a cleaning component (5) for cleaning the filter screen (4).

3. The boiler flue gas waste heat recovery and utilization device according to claim 2, characterized in that, The cleaning assembly (5) includes a cleaning fan blade (6), an outer toothed ring (7), and a drive assembly (8). The drive assembly (8) is located on the side of the smoke inlet pipe (2). The cleaning fan blade (6) is fixed to the inner wall of the connecting pipe (3). One side of the cleaning fan blade (6) is attached to the surface of the filter screen (4). The outer toothed ring (7) is fixed to the side of the connecting pipe (3). The drive assembly (8) and the outer toothed ring (7) mesh with each other.

4. The boiler flue gas waste heat recovery and utilization device according to claim 3, characterized in that, The cleaning fan blade (6) is fixed with a central shaft (9) at the end away from the connecting pipe (3), and the central shaft (9) is also attached to the surface of the filter screen (4).

5. A boiler flue gas waste heat recovery and utilization device according to claim 4, characterized in that, The drive assembly (8) includes a drive motor (10) and a drive gear (11). The drive motor (10) is fixed on the side of the smoke inlet pipe (2), and the drive gear (11) is fixedly sleeved on the surface of the output shaft of the drive motor (10). The drive gear (11) meshes with the external gear ring (7).

6. The boiler flue gas waste heat recovery and utilization device according to claim 5, characterized in that, The side of the connecting pipe (3) is provided with a collection component (12) for collecting.

7. A boiler flue gas waste heat recovery and utilization device according to claim 6, characterized in that, The collection assembly (12) includes an outlet (13), a top connecting plate (14), a bottom connecting plate (15), a side collection ring (16), and a positioning assembly (17). The outlet (13) is located on the side of the connecting pipe (3) corresponding to the position of the cleaning fan blade (6). The cleaning fan blade (6) is designed as an "L". The top connecting plate (14) and the bottom connecting plate (15) are respectively fixed on the side of the connecting pipe (3) at the top and bottom positions of the outlet (13). The side collection ring (16) is movably sleeved on the side of the bottom connecting plate (15) and the side collection ring (16) is attached to the surface of the top connecting plate (14). The positioning assembly (17) is located on the side of the bottom connecting plate (15) away from the top connecting plate (14) and the positioning assembly (17) is movably locked on the surface of the side collection ring (16).

8. A boiler flue gas waste heat recovery and utilization device according to claim 7, characterized in that, The positioning assembly (17) includes a positioning screw (18), a positioning sleeve (19), and a positioning nut (20). The positioning screw (18) is fixed on the side of the bottom connecting plate (15) away from the top connecting plate (14). The positioning sleeve (19) is movably sleeved on the surface of the positioning screw (18). One side of the positioning sleeve (19) is stuck on the end face of the side collecting ring (16). The positioning nut (20) is threaded onto the surface of the positioning screw (18) to limit the positioning sleeve (19).

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