Carbon neutral-based flue gas waste heat recycling device

Abstract

The application discloses a flue gas waste heat recycling device based on carbon neutralization, which comprises a chimney, the lower end of which is used for connecting a flue gas outlet of an incinerator; a heat conduction ring is rotatably connected to the chimney and is used as a part of the chimney, a heat conduction filter plate is fixedly arranged in the heat conduction ring, and a plurality of heat conduction fins are arranged on the outer side of the heat conduction ring; a heat exchange bin is fixedly arranged on the chimney; and an air supply pipeline is fixedly arranged on one side of the heat exchange bin and is used for conveying air participating in incineration. The heat conduction filter plate is arranged to filter flue gas entering the chimney, absorb heat carried by the flue gas, and then transmit the heat to the heat conduction fins through the heat conduction ring. At this time, the air flowing through the air supply pipeline can be in contact with the heat conduction fins when passing through the heat exchange bin, so that the heat on the heat conduction fins is taken away, and then the heat is used for incineration, thereby realizing the function of heating the air for pre-incineration by using the waste heat of the flue gas and achieving the purpose of carbon neutralization.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of flue gas waste heat recycling, and particularly relates to a flue gas waste heat recycling device based on carbon neutralization. BACKGROUND

[0002] The statements in this section merely provide background information related to the application and do not necessarily constitute prior art.

[0003] Carbon neutralization, i.e. energy saving and emission reduction, is widely involved in various fields. In the power generation field, a large amount of carbon emissions are generated due to the involvement of incineration means, and therefore, carbon neutralization management is extremely important in the power generation field.

[0004] In the prior art, a chimney is often provided for a flue gas of a power generation incinerator to discharge the flue gas. The flue gas contains not only a large amount of pollutants but also a large amount of heat. Direct discharge has a huge impact on carbon neutralization. At the same time, the incinerator needs to be supplied with external air during combustion, and the temperature of the external air also has a great influence on the efficiency of the incinerator. Therefore, in actual operation, a preheating method for air is used to improve the efficiency of the incinerator. Obviously, the incinerator not only generates heat but also needs heat. Therefore, how to reasonably utilize the waste heat of the flue gas discharged by the incinerator is an urgent problem to be solved at present. SUMMARY

[0005] In order to overcome the shortcomings of the prior art, the application provides a flue gas waste heat recycling device based on carbon neutralization.

[0006] To achieve the above object, one or more embodiments of the application provide the following technical scheme:

[0007] The first aspect of the application provides a flue gas waste heat recycling device based on carbon neutralization, comprising:

[0008] A chimney is connected to the flue gas discharge port of the incinerator at the lower end.

[0009] A heat-conducting ring is rotationally connected to the chimney, a heat-conducting filter plate is fixedly arranged in the heat-conducting ring, and a plurality of heat-conducting fins are arranged on the outer circumference of the heat-conducting ring.

[0010] A heat exchange bin is fixedly arranged on the chimney and surrounds the part where the heat-conducting ring is located.

[0011] An air supply pipeline is fixedly arranged on one side of the heat exchange bin and is used to transport air participating in incineration.

[0012] Further, the heat-conducting ring is provided with a convex ring structure at both the upper end and the lower end, and the chimney is provided with a groove structure matched with the convex ring structure at the disconnection position, so that the heat-conducting ring can smoothly rotate on the chimney.

[0013] Further, the convex ring structure and the groove structure are both circular.

[0014] Further, the lower side of the heat-conducting filter plate is provided with a collection bin, a cleaning brush is fixedly arranged in the collection bin, and a dust discharge pipe is fixedly arranged at the lower end of the collection bin.

[0015] Further, the gap between the upper end of the collection bin and the heat-conducting filter plate is 5-10 mm.

[0016] Further, the end of the dust discharge pipe away from the collection bin is inclined downward and penetrates the wall of the chimney.

[0017] Further, the collection bin is provided with a conveying assembly for concentrating and guiding the dust in the collection bin to the dust discharge pipe.

[0018] Further, the conveying assembly comprises a rotating shaft rotatably arranged in the collection bin, and a helical blade is fixedly arranged on the rotating shaft.

[0019] Further, a gear is coaxially and fixedly connected to one end of the rotating shaft close to the inner wall of the chimney, and a toothed ring is arranged at the lower end of the heat-conducting ring and engaged with the gear.

[0020] Further, the bottom surface of the collection bin is in the shape of a circular arc matched with the helical blade.

[0021] The above one or more technical solutions have the following beneficial effects:

[0022] The carbon-neutral flue gas waste heat recycling device can filter the flue gas entering the chimney, absorb the heat carried by the flue gas, and then transfer the heat to the heat-conducting fins through the heat-conducting ring. At this time, the air flowing through the air supply pipeline can contact the heat-conducting fins when passing through the heat exchange bin, thereby taking away the heat emitted by the heat-conducting fins, and then being used for incineration, thereby realizing the function of heating the air for pre-incineration by using the waste heat of the flue gas, achieving the purpose of carbon neutralization, and improving the practicality of the device.

[0023] The carbon-neutral flue gas waste heat recycling device is provided with a collection bin, a dust discharge pipe, and a conveying assembly, so that part of the dust adhering to the lower end surface of the heat-conducting filter plate is cleaned, the possibility of blockage of the heat-conducting filter plate is reduced, and the circulation of gas is ensured.

[0024] The advantages of the additional aspects of the present application will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0025] The accompanying drawings, which form a part of this specification, are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification. The embodiments of the application, and their

[0026] Figure 1 A schematic diagram of a front view of a cross-sectional structure of Embodiment 1 of the present application is shown in FIG. 1.

[0027] Figure 2 A schematic diagram of a side view of a cross-sectional structure of Embodiment 1 of the present application is shown in FIG. 2.

[0028] Figure 3 A schematic diagram of a top view of a cross-sectional structure of Embodiment 1 of the present application is shown in FIG. 3.

[0029] Figure 4 A schematic diagram of a front view of a cross-sectional structure of Embodiment 1 of the present application is shown in FIG. 1. Figure 1 A schematic diagram of an enlarged structure at A in FIG. 1.

[0030] In the figure, 1 is a smoke pipe, 2 is a heat-conducting ring, 3 is a heat-conducting filter plate, 4 is a heat-conducting fin, 5 is a heat exchange bin, 6 is a supply air duct, 7 is a collection bin, 8 is a cleaning brush, 9 is a dust discharge pipe, 10 is a rotating shaft, 11 is a helical blade, 12 is a gear, and 13 is a toothed ring. DETAILED DESCRIPTION

[0031] The present disclosure will be further described with reference to the drawings and embodiments.

[0032] It should be noted that the following detailed description is exemplary in nature and is intended to provide further description of the application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0033] It is also to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting, as the scope of the exemplary embodiments of this application will be limited only by the appended claims. As used herein, unless the context clearly indicates otherwise, the singular forms "a," "an," and "the" are intended to include the plural forms as well, i.e., the article "a" or "an" is intended to include the article "at least one" and / or "one or more." Furthermore, it is to be understood that the terms "comprising," "including," and "having" can be used interchangeably.

[0034] Embodiment One

[0035] As Figures 1 to 4As shown, the present application provides a flue gas waste heat recycling device based on carbon neutralization, which comprises a chimney 1, the lower end of which is used for connecting the flue gas outlet of the incinerator; a heat conducting ring 2 is rotatably connected to the chimney 1 and is used as part of the chimney 1, a heat conducting filter plate 3 is fixedly arranged in the heat conducting ring 2, and a plurality of heat conducting fins 4 are arranged on the outer side of the heat conducting ring 2; a heat exchange bin 5 is fixedly arranged on the chimney 1 and surrounds the part where the heat conducting ring 2 is located; an air supply pipeline 6 is fixedly arranged on one side of the heat exchange bin 5 and is used for conveying air participating in incineration.

[0036] Specifically, after the lower end of the chimney 1 is connected to the flue gas outlet of the incinerator, flue gas is continuously discharged from the lower end of the chimney 1 upwards, thereby ensuring that the flue gas must pass through the heat conducting filter plate 3; the chimney 1 comprises two disconnected parts, the heat conducting ring 2 is arranged between the two parts of the chimney 1, the heat conducting ring 2 is provided with a convex ring structure at both ends, and the chimney 1 is provided with a groove structure matching the convex ring structure at the disconnected position, the convex ring structure and the groove structure are matched with each other, which ensures the sealing of the overall side wall of the chimney 1 and the heat conducting ring 2, and at the same time, the convex ring structure and the groove structure are both circular, so that the heat conducting ring 2 can rotate smoothly on the chimney 1; the heat conducting filter plate 3 is used for filtering solid particles in the flue gas to avoid direct emission to the outside and aggravate carbon emission, the heat conducting filter plate 3 can efficiently conduct heat with the heat conducting ring 2; the heat conducting fins 4 can also efficiently conduct heat with the heat conducting ring 2; the heat exchange bin 5 wraps the circumferentially arranged heat conducting fins 4, in other words, the end of the heat conducting fin 4 and the inner wall of the heat exchange bin 5 are matched with each other; the air supply pipeline 6 communicates with the heat exchange bin 5, so that part of the heat conducting fins 4 are arranged in the air supply pipeline 6, and when air is conveyed in the air supply pipeline 6, the flowing air can exert a pushing force on the heat conducting fins 4, thereby driving the heat conducting ring 2 to rotate. In actual use, the flue gas enters from the lower end of the chimney 1 and is discharged upwards, the fixed particles contained in the flue gas can be blocked when passing through the heat conducting filter plate 3, so that the flue gas cannot continue to be discharged outward with the airflow, thereby reducing carbon emission, at the same time, the heat conducting filter plate 3 absorbs part of the heat carried by the flue gas and transmits it to the heat conducting ring 2, then the heat conducting ring 2 transmits the heat to the heat conducting fins 4, and the heat conducting fins 4 transmit the heat to the heat exchange bin 5, at this time, the air flowing through the air supply pipeline 6 can contact the heat conducting fins 4 when passing through the heat exchange bin 5, thereby taking away the heat emitted by the heat conducting fins 4, and then being used for incineration, that is, the function of heating the pre-incineration air by using the waste heat of the flue gas is realized, the purpose of carbon neutralization is achieved, and the practicability of the device is improved.

[0037] Compared with the prior art, the flue gas waste heat recycling device based on carbon neutralization provided by the embodiment of the present application can filter the flue gas entering the chimney 1, absorb the heat carried by the flue gas, and then transfer the heat to the heat conduction fins 4 through the heat conduction ring 2. At this time, the air flowing through the air supply pipeline 6 can contact the heat conduction fins 4 when passing through the heat exchange bin 5, thereby taking away the heat emitted by the heat conduction fins 4, and then being used for incineration, thereby realizing the function of heating the air for pre-incineration by using the waste heat of the flue gas, achieving the purpose of carbon neutralization, and improving the practicality of the device.

[0038] In another embodiment of the present application, the heat conduction filter plate 3 is provided with a collection bin 7 on the lower side, the collection bin 7 is fixedly provided with a cleaning brush 8, and the collection bin 7 is fixedly provided with a dust discharge pipe 9 at the lower end. Specifically, the collection bin 7 is only provided as a transverse structure, and the cross section is V-shaped, which ensures that the flue gas circulation is not hindered, and the flue dust is more easily received. The upper end of the cleaning brush 8 is in contact with the heat conduction filter plate 3, the dust discharge pipe 9 is in communication with the inside of the collection bin 7, and the cleaning brush 8 is arranged in the collection bin 7, so that the flue dust hung by the cleaning brush 8 must fall into the collection bin 7. In actual use, when the heat conduction filter plate 3 is driven to rotate by the heat conduction fins 4, the filtering surface at the lower end of the heat conduction filter plate 3 used for direct contact with the flue dust will be hung by the cleaning brush 8, so that part of the flue dust adhered to the surface of the lower end of the heat conduction filter plate 3 is cleaned, the possibility of blockage of the heat conduction filter plate 3 is reduced, and the circulation of the gas is ensured.

[0039] As a preferred technical solution of the present embodiment, the gap between the upper end of the collection bin 7 and the heat conduction filter plate 3 is set to 5-10mm. Specifically, the gap between the upper end of the collection bin 7 and the heat conduction filter plate 3 should not be too large, because the heat conduction filter plate 3 has an obstructive effect on the passage of flue gas. When the flue gas circulation is not smooth, it will find a more convenient outlet. The gap between the upper end of the collection bin 7 and the heat conduction filter plate 3 is set to 5-10mm, which also obstructs the passage of flue gas, so as to avoid the flue gas being discharged outward through the dust discharge pipe 9, and at the same time, ensure that the upper end of the collection bin 7 and the heat conduction filter plate 3 maintain a gap to avoid obstructing the rotation of the heat conduction filter plate 3.

[0040] As a preferred technical solution of the present embodiment, the end of the dust discharge pipe 9 away from the collection bin 7 is inclined downward and penetrates the chimney 1 wall. Specifically, the lower end of the dust discharge pipe 9 is inclined, so that the flue dust entering the dust discharge pipe 9 can slide to the lower end under the action of gravity, and then smoothly leave the collection bin 7 and the chimney 1.

[0041] In still another embodiment of the present application, the collecting bin 7 is provided with a conveying assembly for guiding the dust therein to the dust discharging pipe 9. In particular, since the collecting bin 7 is provided with a horizontal structure to avoid obstructing the flue gas flow, the dust falling into the collecting bin 7 cannot all smoothly enter the dust discharging pipe 9. The conveying assembly ensures that the dust falling into the collecting bin 7 can all enter the dust discharging pipe 9 and then be smoothly discharged out of the dust discharging pipe 9.

[0042] As a preferred technical solution of the present embodiment, the conveying assembly comprises a rotating shaft 10 arranged in the collecting bin 7, and the rotating shaft 10 is fixedly provided with a helical blade 11. In particular, the rotating shaft 10 drives the helical blade 11 to rotate to generate a helical feeding action, and the helical feeding direction of the helical blade 11 is kept towards the dust discharging pipe 9. Thus, the dust pushed by the helical blade 11 can move towards the dust discharging pipe 9 to smoothly enter the dust discharging pipe 9.

[0043] As a further preferred technical solution of the present embodiment, the rotating shaft 10 is coaxially fixedly connected with a gear 12 at one end close to the inner wall of the flue 1, and the heat conducting ring 2 is provided with a gear ring 13 engaged with the gear 12 at the lower end. In particular, when the heat conducting ring 2 rotates, the gear ring 13 is driven to rotate. Since the rotating shaft 10 is rotatably connected in the collecting bin 7, the gear 12 is fixed at a position relatively stable to the flue 1, so that the gear 12 can be driven to rotate by the rotating gear ring 13, thereby driving the rotating shaft 10 to rotate. The rotating shaft 10 thus drives the helical blade 11 to rotate to convey the dust.

[0044] As a further preferred technical solution of the present embodiment, the bottom surface of the collecting bin 7 is provided with a circular arc shape matched with the helical blade 11. In particular, the circular arc-shaped bottom surface is provided to make the dust falling into the collecting bin 7 more conveniently pushed by the helical blade 11, i.e., to ensure that the dust in the collecting bin 7 can all be conveyed to the dust discharging pipe 9.

[0045] The above description of the specific embodiments of the present application in conjunction with the accompanying drawings is not a limitation on the scope of protection of the present application. Those skilled in the art should understand that various modifications or variations made to the technical solutions of the present application without creative labor are still within the scope of protection of the present application.

Claims

1. A flue gas waste heat recovery and utilization device based on carbon neutrality, characterized in that, include: Chimney (1), the lower end of which is connected to the exhaust port of the incinerator; A heat-conducting ring (2) is rotatably connected to the chimney (1), and a heat-conducting filter plate (3) is fixedly installed inside it, and multiple heat-conducting fins (4) are arranged on its outer circumference. Heat exchange chamber (5), which is fixedly installed on the chimney (1) and surrounds the part where the heat conduction ring (2) is located; Air supply duct (6), which is fixedly installed on one side of the heat exchange chamber (5) and is used to transport air participating in combustion; The ends of the heat-conducting fins are in contact with the inner wall of the heat exchange chamber; the air supply duct is connected to the heat exchange chamber, and some of the heat-conducting fins are arranged in the air supply duct. When air is transported in the air supply duct, the flowing air can exert a thrust on the heat-conducting fins, thereby driving the heat-conducting ring to rotate.

2. The flue gas waste heat recovery and utilization device based on carbon neutrality according to claim 1, characterized in that, The heat-conducting ring (2) has a convex ring structure at both the upper and lower ends, and a groove structure matching the convex ring structure is provided at the disconnected position of the chimney (1), so that the heat-conducting ring (2) can rotate smoothly on the chimney (1).

3. The flue gas waste heat recovery and utilization device based on carbon neutrality according to claim 2, characterized in that, Both the convex ring structure and the groove structure are designed to be circular.

4. The flue gas waste heat recovery and utilization device based on carbon neutrality according to claim 1, characterized in that, A collection chamber (7) is provided on the lower side of the heat-conducting filter plate (3), a cleaning brush (8) is fixedly installed inside the collection chamber (7), and a dust discharge pipe (9) is fixedly installed at the lower end of the collection chamber (7).

5. The flue gas waste heat recovery and utilization device based on carbon neutrality according to claim 4, characterized in that, The gap between the upper end of the collection chamber (7) and the heat-conducting filter plate (3) is set to 5-10mm.

6. The flue gas waste heat recovery and utilization device based on carbon neutrality according to claim 4, characterized in that, The dust discharge pipe (9) is inclined downward at the end away from the collection bin (7) and runs through the wall of the chimney (1).

7. The flue gas waste heat recovery and utilization device based on carbon neutrality according to claim 2, characterized in that, The collection chamber (7) is equipped with a conveying assembly for concentrating and guiding the dust inside to the dust discharge pipe (9).

8. The flue gas waste heat recovery and utilization device based on carbon neutrality according to claim 7, characterized in that, The conveying assembly includes a rotating shaft (10) rotatably disposed inside the collection bin (7), and a spiral blade (11) is fixedly disposed on the rotating shaft (10).

9. The flue gas waste heat recovery and utilization device based on carbon neutrality according to claim 8, characterized in that, The shaft (10) is coaxially fixedly connected to a gear (12) at one end near the inner wall of the chimney (1), and a toothed ring (13) that meshes with the gear (12) is provided at the lower end of the heat-conducting ring (2).

10. The flue gas waste heat recovery and utilization device based on carbon neutrality according to claim 8, characterized in that, The bottom surface of the collection chamber (7) is set in an arc shape that matches the spiral blade (11).

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