Chimney apparatus with waste heat recovery

Abstract

This utility model provides a chimney device with waste heat recovery, relating to the field of chimney device technology. It includes a flue and a descaling assembly. The descaling assembly includes a fixed frame fixedly connected inside the flue, a sliding frame slidably connected to the fixed frame, a return spring fixedly connected to the sliding frame via a connecting rod, a fan blade slidably connected to the fixed frame, a rotating shaft fixedly connected to the fan blade, a vertical rod slidably connected to the sliding frame, and a scraper fixedly connected to the vertical rod. This utility model forms a circulating descaling mechanism by driving the scraper to reciprocate. This process utilizes the heat energy of the flue gas itself, requiring no additional energy, and can prevent the deposition and thickening of scale on the inner wall of the flue in real time. Through this active and high-frequency scraping action, it effectively avoids the formation of a heat insulation layer by scale, fundamentally reducing the increase in thermal resistance and ensuring efficient heat transfer between the flue gas and the heat exchange medium.

Description

Technical Field

[0001] This utility model relates to the field of chimney equipment technology, and in particular to a chimney equipment with waste heat recovery. Background Technology

[0002] Large industrial chimney equipment (such as power plant boilers, metallurgical kilns, etc.) usually needs to handle complex flue gas with ultra-high flow rate, high temperature and high dust content;

[0003] However, in the existing technology, after existing pollutants are deposited on the inner surface of the flue, they will form a heat insulation layer. This heat insulation layer will significantly increase the thermal resistance and hinder the heat transfer between the flue gas and the heat exchange medium. For example, when the scale thickness reaches one millimeter, the heat exchange efficiency may drop by 30% to 50%, and a large amount of originally recoverable waste heat will be lost, resulting in a significant reduction in the energy-saving effect of the equipment, and even failing to meet the waste heat utilization needs of production. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a chimney device with waste heat recovery.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a chimney device with waste heat recovery, comprising:

[0006] Smoke pipe;

[0007] A descaling assembly includes a fixed frame fixedly connected to a flue, a sliding frame slidably connected to the fixed frame, a return spring fixedly connected to the sliding frame via a series rod, a fan blade slidably connected to the fixed frame, a rotating shaft fixedly connected to the fan blade, a vertical rod slidably connected to the sliding frame, and a scraper fixedly connected to the vertical rod.

[0008] In a preferred embodiment, a base block is fixedly connected to the bottom of the fixed frame, and a transverse spring is fixedly connected to the vertical rod, with the side of the transverse spring away from the vertical rod fixedly connected to the base block.

[0009] The above technical solution is adopted: when in use, a horizontal spring is set, and the two ends of the horizontal spring are respectively connected to the bottom block fixed to the fixed frame and the vertical rod, so as to facilitate the reset of the vertical rod.

[0010] In a preferred embodiment, a series frame is rotatably connected to the rotating shaft, and an inner frame is fixedly connected to the series frame, with the inner frame fixedly connected to the flue.

[0011] The above technical solution is adopted: a series frame is rotatably connected to the rotating shaft, and the arrangement of the series frame and the inner frame facilitates the support of the rotating shaft.

[0012] In a preferred embodiment, the scraper is slidably connected to the flue.

[0013] The above technical solution involves setting a scraper that slides onto the inner wall of the flue, making it easier to scrape away dirt from the inner wall of the flue.

[0014] In a preferred embodiment, a vertical spring is fixedly connected to the inner frame, and the side of the vertical spring away from the inner frame is fixedly connected to the smoke pipe.

[0015] The above technical solution involves setting a vertical spring fixedly connected to the inner frame, which provides additional support for the fixed frame.

[0016] In a preferred embodiment, the fixed frame has an annular groove, the fan blade is slidably connected to the annular groove on the fixed frame, and the deflector frame is slidably connected to the fan blade.

[0017] The above technical solution involves creating an annular groove on the fixed frame to facilitate the sliding of the fan blades within it.

[0018] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0019] This invention enables automatic and continuous removal of dirt from the inner wall of a flue. When flue gas passes through, the rising hot airflow drives the fan blades to rotate. The fan blades then move the sliding frame within the fixed frame, causing the vertical rod to move the scraper along the inner wall of the flue, promptly scraping away newly formed dirt. Simultaneously, the fan blades intermittently disengage from the sliding frame, which is then reset by a return spring. Subsequently, the fan blades move the sliding frame again, causing the scraper to reciprocate, forming a cyclical descaling mechanism. This process is driven by the heat energy of the flue gas itself, requiring no additional energy, and can prevent dirt from depositing and thickening on the inner wall of the flue in real time. Through this active and high-frequency scraping action, the formation of a heat insulation layer by dirt is effectively prevented, reducing the increase in thermal resistance at the source and ensuring efficient heat transfer between the flue gas and the heat exchange medium. Attached Figure Description

[0020] Figure 1 A schematic diagram of the overall structure of a chimney device with waste heat recovery provided by this utility model.

[0021] Figure 2 A schematic diagram of the cross-sectional structure of a chimney device with waste heat recovery provided by this utility model.

[0022] Figure 3 A schematic diagram of the fan blade position of a chimney device with waste heat recovery provided by this utility model.

[0023] Figure 4 A schematic diagram showing the position of the rotating shaft of a chimney device with waste heat recovery provided by this utility model.

[0024] Figure 5 A schematic diagram showing the position of the vertical spring in a chimney device with waste heat recovery provided by this utility model.

[0025] Legend:

[0026] 1. Smoke pipe;

[0027] 2. Descaling components; 21. Fan blades; 22. Fixing frame; 23. Rotating shaft; 24. Pulley frame; 25. Connecting rod; 26. Return spring; 27. Base block; 28. Horizontal spring; 29. ​​Vertical rod; 210. Scraper;

[0028] 3. Vertical spring; 31. Inner frame; 32. Series frame. Detailed Implementation

[0029] 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.

[0030] like Figure 1-5 As shown, this utility model provides a technical solution: a chimney device with waste heat recovery, comprising:

[0031] Smoke pipe 1;

[0032] The descaling component 2 includes a fixed frame 22 fixedly connected to the flue pipe 1, a sliding frame 24 slidably connected to the fixed frame 22, a return spring 26 fixedly connected to the sliding frame 24 via a series rod 25, a fan blade 21 slidably connected to the fixed frame 22, a rotating shaft 23 fixedly connected to the fan blade 21, a vertical rod 29 slidably connected to the sliding frame 24, and a scraper 210 fixedly connected to the vertical rod 29.

[0033] In this invention, the automatic and continuous removal of dirt from the inner wall of the flue pipe 1 is achieved. When the flue gas flows through, the rising hot airflow drives the fan blade 21 to rotate. The fan blade 21 then moves the deflector frame 24 to slide within the fixed frame 22, causing the vertical rod 29 to move the scraper 210 on the inner wall of the flue pipe 1, thus promptly scraping away the newly formed dirt. At the same time, the fan blade 21 will intermittently disengage from the deflector frame 24. The deflector frame 24 is reset by the return spring 26. Subsequently, the fan blade 21 moves the deflector frame 24 again, causing the scraper 210 to reciprocate, forming a circulating descaling mechanism. This process is driven by the heat energy of the flue gas itself, without the need for additional energy, and can prevent dirt from depositing and thickening on the inner wall of the flue pipe 1 in real time. Through this active and high-frequency scraping action, the formation of a heat insulation layer by dirt is effectively avoided, reducing the increase in thermal resistance from the source and ensuring efficient heat transfer between the flue gas and the heat exchange medium.

[0034] Furthermore, such as Figures 1 to 5 As shown, a base block 27 is fixedly connected to the bottom of the fixed frame 22, and a transverse spring 28 is fixedly connected to the vertical rod 29. The side of the transverse spring 28 away from the vertical rod 29 is fixedly connected to the base block 27. In use, the transverse spring 28 is provided, and its two ends are respectively connected to the base block 27 fixed to the fixed frame 22 and the vertical rod 29, so that the vertical rod 29 can be reset. The transverse spring 28 and the reset spring 26 are both made of nickel-based high-temperature alloy. Its composition, by mass percentage, includes: Cr 19-22%, Co 9-11%, Mo 8-10%, Ti 1.8-2.4%, Al 1.4-1.7%, with the balance being Ni and unavoidable impurities. The surface of the spring has a tungsten carbide diffusion layer and an AlCrN coating.

[0035] like Figure 5 As shown, a series frame 32 is rotatably connected to the rotating shaft 23, and an inner frame 31 is fixedly connected to the series frame 32. The inner frame 31 is fixedly connected to the smoke pipe 1. By rotatably connecting the series frame 32 to the rotating shaft 23, the arrangement of the series frame 32 and the inner frame 31 facilitates the support of the rotating shaft 23.

[0036] like Figures 2 to 4 As shown, the scraper 210 is slidably connected to the flue pipe 1. By setting the scraper 210 to be slidably connected to the inner wall of the flue pipe 1, it is easy to scrape off the dirt on the inner wall of the flue pipe 1.

[0037] like Figure 5 As shown, a vertical spring 3 is fixedly connected to the inner frame 31. The side of the vertical spring 3 away from the inner frame 31 is fixedly connected to the smoke pipe 1. By setting the vertical spring 3 fixedly connected to the inner frame 31, it provides additional support for the fixed frame 22.

[0038] like Figures 2 to 4As shown, an annular groove is provided on the fixed frame 22, and the fan blade 21 is slidably connected in the annular groove on the fixed frame 22. The deflector frame 24 is slidably connected to the fan blade 21. The annular groove on the fixed frame 22 facilitates the sliding of the fan blade 21 within it.

[0039] Working principle:

[0040] like Figure 1-5 As shown, during use, when the smoke flows through the fan blade 21, the rising hot air will drive the fan blade 21 to rotate, causing the fan blade 21 to drive the lever frame 24 to slide within the fixed frame 22. At this time, the fixed frame 22 will move the vertical rod 29 to a certain position, causing the vertical rod 29 to move the scraper 210 on the inner wall of the smoke pipe 1, scraping away the dirt on the inner wall of the smoke pipe 1. During this process, the fan blade 21 will intermittently disengage from the lever frame 24, causing the lever frame 24 to be driven back to its original position under the action of the return spring 26. Then, the fan blade 21 will move again to drive the vertical rod 29 and the scraper 210 to a certain position, scraping away the dirt inside the smoke pipe 1.

[0041] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A chimney apparatus with waste heat recovery, characterized by, include: Smoke pipe (1); The descaling assembly (2) includes a fixed frame (22) fixedly connected inside the flue (1), a lever frame (24) slidably connected to the fixed frame (22), a return spring (26) fixedly connected to the lever frame (24) via a connecting rod (25), a fan blade (21) slidably connected to the fixed frame (22), a rotating shaft (23) fixedly connected to the fan blade (21), a vertical rod (29) slidably connected to the lever frame (24), and a scraper (210) fixedly connected to the vertical rod (29).

2. A chimney unit with waste heat recovery according to claim 1, characterized in that: The bottom of the fixed frame (22) is fixedly connected to a base block (27), and a transverse spring (28) is fixedly connected to the vertical rod (29). The side of the transverse spring (28) away from the vertical rod (29) is fixedly connected to the base block (27).

3. A chimney apparatus with waste heat recovery according to claim 1, characterized in that: A series frame (32) is rotatably connected to the rotating shaft (23), and an inner frame (31) is fixedly connected to the series frame (32). The inner frame (31) is fixedly connected inside the smoke pipe (1).

4. A chimney apparatus with waste heat recovery according to claim 1, characterized in that: The scraper (210) is slidably connected to the inner wall of the flue (1).

5. A chimney device with waste heat recovery according to claim 3, characterized in that: A vertical spring (3) is fixedly connected to the inner frame (31), and the side of the vertical spring (3) away from the inner frame (31) is fixedly connected to the inside of the smoke pipe (1).

6. A chimney apparatus with waste heat recovery according to claim 1, characterized in that: The fixed frame (22) has an annular groove, the fan blade (21) is slidably connected in the annular groove on the fixed frame (22), and the dial frame (24) is slidably connected to the fan blade (21).

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