Boiler flue heat recovery device

Abstract

The present application relates to heat energy recovery device technical field, specifically to boiler flue heat energy recovery device, including boiler flue main part and heat recovery device main body, the outside of boiler flue main part is provided with heat recovery device main body, the heat recovery device main body is spliced by two groups of outer protection cylinder, two groups the outer protection cylinder is sequentially provided with ash channel cavity, outer water cavity, hot smoke cavity and inner water cavity from outside to inside, the top of the inside of outer protection cylinder is inserted with boiler flue main part and is inserted, the outer protection cylinder is connected with limiting component through adjusting mechanism, the inside of outer protection cylinder and located above boiler flue main part are provided with hot flue gas inlet, the inside of hot smoke inlet is provided with protection component, the heat recovery device main body is connected with threaded sleeve through canopy, compared with existing boiler flue heat energy recovery device, the present application improves the convenience and practicality of existing boiler flue heat energy recovery device by design.

Description

Technical Field

[0001] This invention relates to the field of heat recovery device technology, specifically to a boiler flue heat recovery device. Background Technology

[0002] The boiler tail flue refers to the flue located at the tail of the boiler for exhausting flue gas. With the continuous development of boiler technology, the capacity of power plant boilers in China is constantly expanding. The flue gas temperature of boilers used in various industries is generally between 120-150 degrees Celsius. As a result, a large amount of heat energy is lost with the boiler exhaust gas, resulting in high boiler energy consumption and low heat utilization rate. Secondly, the inner wall of the flue is prone to ash accumulation after long-term use. The increase of ash and slag accumulation will lead to an increase in the pipe wall temperature, causing high-temperature corrosion or even metal pipe wall leakage, which will increase the operating costs of the power plant and cause unnecessary losses. Therefore, it is necessary to properly remove the ash and slag accumulation on the pipe wall surface.

[0003] Therefore, in order to improve the existing boiler flue heat recovery device, a new type of boiler flue heat recovery device is designed to overcome the above-mentioned technical defects and improve the overall practicality of the boiler flue heat recovery device. Summary of the Invention

[0004] The purpose of this invention is to provide a boiler flue heat recovery device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A boiler flue heat recovery device includes a boiler flue body and a heat recovery device body. The heat recovery device body is located on the outside of the boiler flue body. The heat recovery device body is composed of two sets of outer protective cylinders spliced ​​together. Each set of outer protective cylinders has an ash channel cavity, an outer water cavity, a hot flue cavity, and an inner water cavity sequentially opened from the outside to the inside. The top of the inner end of the outer protective cylinder is inserted into the boiler flue body through a connector. The outer protective cylinder is connected to a limiting component through an adjustment mechanism. A hot flue gas inlet is opened inside the outer protective cylinder and above the boiler flue body. A protective component is provided on the inner side of the hot flue gas inlet. The heat recovery device body is connected to a threaded sleeve through a canopy. One end of the threaded sleeve extends into the interior of the boiler flue body and is connected to a cleaning component.

[0007] The protective assembly includes a protective cover, a filter screen, and a spring. The protective cover is provided inside the hot smoke chamber and at a position corresponding to the hot smoke inlet. The filter screen is provided on the outside of the protective cover. The protective cover is connected to the filter screen by the spring.

[0008] The limiting component includes a limiting protrusion and a rubber pad. The bottom end of the outer protective cylinder and the outer side of the boiler flue body are provided with a limiting protrusion, and the contact surface between the limiting protrusion and the boiler flue body is provided with a rubber pad.

[0009] The adjustment mechanism includes an adjustment rod and a connecting rod. The adjustment rod is rotatably connected to the bottom of the boiler flue body, and the adjustment rod is connected to the limiting protrusion through the connecting rod.

[0010] As a preferred embodiment of the present invention, the interior of the outer water cavity and the inner water cavity are designed in a connected structure, and the interior of the boiler flue body and the sidewalls located between the inner water cavity and the outer water cavity are designed in a toothed structure.

[0011] As a preferred embodiment of the present invention, the protective cover is designed with a ring structure and the cross-section of the protective cover is hemispherical, and a sealing rubber strip is provided at the joint of the two sets of outer protective cylinders.

[0012] As a preferred embodiment of the present invention, one end of the adjusting rod extends to the outside of the boiler flue body and is provided with a knob. The inside of the adjusting rod is provided with a limiting groove for the connecting rod to slide, and the limiting groove is spliced ​​together by multiple sets of X-shaped cross grooves. The end of the limiting protrusion connected to the connecting rod extends into the inside of the outer protective cylinder and is designed with a rectangular structure. The connection between the limiting protrusion and the outer protective cylinder is a sliding connection.

[0013] As a preferred embodiment of the present invention, the ash removal assembly includes a connector, a collection bucket, a cleaning brush, and a semi-arc conveyor. The threaded sleeve is connected to the collection bucket through the connector. A cleaning brush is provided at the connection between the collection bucket and the boiler flue body. Two sets of semi-arc conveyors are symmetrically arranged at the bottom of the collection bucket and on the outside of the threaded sleeve.

[0014] As a preferred embodiment of the present invention, the threaded sleeve is provided with an ash inlet groove at the position corresponding to the two sets of semi-arc conveying components, the threaded sleeve is provided with a conveying auger inside, the connection between the connecting component and the threaded sleeve is a threaded connection, and the connection between the cleaning brush and the boiler flue body is a sliding connection.

[0015] As a preferred embodiment of the present invention, the connection between the collection bucket and the two sets of semi-circular conveying components is designed with an inverted conical structure, and the bottom of the collection bucket and the corresponding positions of the two sets of semi-circular conveying components are provided with through holes.

[0016] As a preferred embodiment of the present invention, one end of the threaded sleeve extends to the top of the canopy and is provided with a drive motor. A support plate is provided at the bottom of the drive motor. The support plate is connected to the canopy through four sets of support legs. The canopy is fixedly connected to two sets of outer protective cylinders by bolts.

[0017] As a preferred embodiment of the present invention, both the outer protective cylinder and the top of the canopy are designed with a conical structure. The threaded sleeve is connected to the canopy by a rotating connection. One end of the threaded sleeve extends to the top of the canopy and is provided with a ash outlet hole. Both ends of the ash channel cavity are designed as open types.

[0018] As a preferred embodiment of the present invention, the inner water cavity is connected to a water inlet pipe, the outer water cavity is connected to a water outlet pipe, and the hot smoke cavity is connected to a smoke exhaust pipe.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] In this invention, by using two sets of outer protective cylinders, boiler flue body, outer water cavity (302), hot flue cavity and inner water cavity in combination, the heat energy of the hot flue gas flow and inner wall temperature inside the boiler flue body is recovered and rationally utilized. The toothed contact inner wall increases the contact surface and improves the heat conduction effect, resulting in better heat conduction. The hot flue gas flow conducts heat to the inner walls of the inner and outer water cavities, increasing the internal temperature of the inner and outer water cavities. Then, the temperature of the side wall of the boiler flue body conducts heat to the inner wall of the inner water cavity, further increasing the internal temperature of the hot flue cavity. This results in better heating effect of the water inside the inner and outer water cavities and improved heating efficiency.

[0021] Secondly, by using the drive motor, threaded sleeve, conveying auger and ash cleaning components together, it is not only convenient to clean the ash and slag on the inner wall of the boiler flue, but also convenient to transport the collected ash and slag from inside the boiler flue to the outside ground. By cleaning the inner wall of the boiler flue, the heat transfer effect of the boiler flue to the inner water cavity is guaranteed, and the convenience and practicality are improved.

[0022] Furthermore, through the coordinated use of the adjustment mechanism, limiting components, and connectors, the adjustment mechanism facilitates the adjustment of the two sets of limiting components to different distances, allowing the limiting protrusions to be inserted into and removed from the limiting grooves. Combined with the insertion function of the connectors, this makes it easier to assemble and disassemble the two sets of outer protective cylinders on the boiler flue body, further improving convenience. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall external structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the overall top structure of the present invention;

[0025] Figure 3 This is an anatomical diagram of the internal structure of the heat recovery device body and the boiler flue body of the present invention;

[0026] Figure 4 This is an anatomical diagram of the internal structure of the dust removal component of the present invention;

[0027] Figure 5 This is a schematic diagram of the external structure of the dust removal component of the present invention;

[0028] Figure 6 This is an enlarged view of the present invention (A).

[0029] Figure 7 This is an enlarged view of the present invention, shown in Figure B.

[0030] In the diagram: 1. Boiler flue body; 101. Hot flue gas inlet; 2. Heat recovery device body; 3. Outer protective cylinder; 301. Ash channel cavity; 302. Outer water cavity; 303. Hot flue gas cavity; 304. Inner water cavity; 4. Connector; 5. Adjustment mechanism; 501. Adjustment rod; 502. Connecting rod; 6. Limiting component; 601. Limiting protrusion; 602. Rubber pad; 7. Threaded sleeve; 701. Conveying auger; 8. Protective component; 801. Protective cover; 802. Filter screen; 803. Spring; 9. Canopy; 10. Ash removal component; 1001. Connector; 1002. Collection bucket; 1003. Cleaning brush; 1004. Semi-arc conveyor; 11. Knob; 12. Ash outlet; 13. Drive motor; 14. Water inlet pipe; 15. Water outlet pipe; 16. Flue gas exhaust pipe. Detailed Implementation

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention. Example

[0032] Please see Figures 1-7 The present invention provides a technical solution:

[0033] The boiler flue heat recovery device includes a boiler flue body 1 and a heat recovery device body 2. The heat recovery device body 2 is installed on the outside of the boiler flue body 1. The heat recovery device body 2 is composed of two sets of outer protective cylinders 3 spliced ​​together. The two sets of outer protective cylinders 3 are provided with an ash channel cavity 301, an outer water cavity 302, a hot flue cavity 303 and an inner water cavity 304 in sequence from the outside to the inside. The top of the inner end of the outer protective cylinder 3 is connected to the boiler flue body 1 through a connector 4. The outer protective cylinder 3 is connected to the limiting component 6 through an adjustment mechanism 5. A hot flue gas inlet is provided inside the outer protective cylinder 3 and above the boiler flue body 1. A protective component 8 is provided on the inner side of the hot flue gas inlet 101. The heat recovery device body 2 is connected to a threaded sleeve 7 through a canopy 9. One end of the threaded sleeve 7 extends into the interior of the boiler flue body 1 and is connected to a cleaning component 10.

[0034] Please refer to Figure 3 and Figure 6 In this embodiment, the specific structure of the protective component 8 is as follows:

[0035] The protective component 8 includes a protective cover 801, a filter screen 802, and a spring 803. The protective cover 801 is provided inside the hot smoke chamber 303 and at a position corresponding to the hot smoke inlet 101. The filter screen 802 is provided on the outside of the protective cover 801. The protective cover 801 is connected to the filter screen 802 through the spring 803. The protective cover 801 has a ring structure design and the cross-section of the protective cover 801 is hemispherical.

[0036] The protective component 8 facilitates the sealing and protection of the hot flue chamber 303. When hot flue gas is discharged from the boiler flue body 1, the hot flue gas flow discharged from the boiler flue body 1 impacts and compresses the protective cover 801 and spring 803 through the hot flue gas inlet 101, thereby entering the filter screen 802. At the same time, the filter screen 802 adsorbs and filters the ash in the hot flue gas, thereby reducing the impurities carried by the hot flue gas, so that the filtered hot flue gas flow enters the hot flue chamber 303. The inner and outer walls of the boiler flue body 1, the inner water chamber 304, the hot flue chamber 303, and the outer water chamber 302 are all... Made of a metal heat-conducting material, the inner walls of the inner water cavity 304 and the outer water cavity 302 are heated by heat conduction. The hot flue gas is then discharged through the flue pipe 16. The side walls inside the boiler flue body 1, located between the inner water cavity 304 and the outer water cavity 302, are all designed with a toothed structure. The toothed structure wall design can increase the contact area between the hot flue gas flow inside the hot flue gas cavity 303 and the inner water cavity 304 and the outer water cavity 302, thereby improving the heating rate of the cold water inside the inner water cavity 304 and the outer water cavity 302, and thus facilitating the recovery and reuse of the hot flue gas emitted from the boiler flue body 1.

[0037] Secondly, please refer to Figure 1 and Figure 7 In this embodiment, the specific structure of the limiting component 6 is as follows:

[0038] The limiting component 6 includes a limiting protrusion 601 and a rubber pad 602. The bottom end of the outer protective cylinder 3 and the outer side of the boiler flue body 1 are provided with a limiting protrusion 601. The contact surface between the limiting protrusion 601 and the boiler flue body 1 is provided with a rubber pad 602. Limiting grooves are opened at the positions corresponding to the two sets of limiting protrusions 601 on the boiler flue body 1.

[0039] By using the two sets of limiting protrusions 601 and limiting grooves to fit together, the main body 2 of the heat recovery device can be easily fitted and fixed on the outer circumferential wall of the boiler flue body 1. Combined with the protective function of the rubber pad 602, the tightness is increased while protecting the contact surface of the boiler flue body 1, avoiding wear on the outer surface of the boiler flue body 1 during the fitting process.

[0040] For further information, please refer to [link / reference]. Figure 7 In this embodiment, the specific structure of the adjustment mechanism 5 is as follows:

[0041] The regulating mechanism 5 includes an regulating rod 501 and a connecting rod 502. The regulating rod 501 is rotatably connected to the bottom of the boiler flue body 1. The regulating rod 501 is connected to the limiting protrusion 601 through the connecting rod 502.

[0042] One end of the adjusting rod 501 extends to the outside of the boiler flue body 1 and is provided with a knob 11. The adjusting rod 501 has a limiting groove for the connecting rod 502 to slide inside. The limiting groove is spliced ​​together by multiple sets of X-shaped cross grooves. The end of the limiting protrusion 601 connected to the connecting rod 502 extends into the interior of the outer protective cylinder 3 and has a rectangular structure design. The connection between the limiting protrusion 601 and the outer protective cylinder 3 is a sliding connection.

[0043] The adjustment mechanism 5 allows for easy adjustment of the spacing between the two sets of limiting protrusions 601, enabling them to move closer to or further away from the limiting holes. Combined with the insertion function of the two sets of connectors 4, the outer protective cylinder 3 can be easily fitted onto the boiler flue body 1 via the connectors 4, providing left and right limiting to prevent detachment of the installed outer protective cylinder 3. The forward and reverse rotation knob 11 drives the adjustment rod 501 to rotate synchronously. As the adjustment rod 501 rotates, it pushes the connecting rod 502 left and right repeatedly through the cross-shaped limiting groove, allowing the limiting protrusions 601 to be inserted into or removed from the limiting groove. By inserting the limiting protrusions 601 into the limiting groove, the installed outer protective cylinder 3 can be limited vertically, thereby increasing the stability of the installation of the outer protective cylinder 3 and the boiler flue body 1, while also facilitating disassembly and assembly, making it more convenient.

[0044] For further details, please refer to [link / reference]. Figure 3 and Figure 4 In this embodiment, the specific structure of the dust removal component 10 is as follows:

[0045] The ash removal assembly 10 includes a connector 1001, a collection bucket 1002, a cleaning brush 1003, and a semi-arc conveyor 1004. The threaded sleeve 7 is connected to the collection bucket 1002 through the connector 1001. A cleaning brush 1003 is provided at the connection between the collection bucket 1002 and the boiler flue body 1. Two sets of semi-arc conveyors 1004 are symmetrically arranged at the bottom of the collection bucket 1002 and on the outside of the threaded sleeve 7.

[0046] The threaded sleeve 7 is provided with ash inlet grooves at the corresponding positions of the two sets of semi-arc conveying components 1004. The threaded sleeve 7 is provided with a conveying auger 701 inside. The connection between the connector 1001 and the threaded sleeve 7 is a threaded connection. The connection between the cleaning brush 1003 and the boiler flue body 1 is a sliding connection. The connection between the collection bucket 1002 and the two sets of semi-arc conveying components 1004 is designed with an inverted conical structure. The bottom of the collection bucket 1002 and the corresponding positions of the two sets of semi-arc conveying components 1004 are provided with through holes.

[0047] The inner wall of the boiler flue body 1 easily attracts and accumulates ash and residue from hot smoke. The ash removal assembly 10 not only facilitates cleaning of the ash and residue on the inner wall of the boiler flue body 1, but also allows for the convenient transport of the collected ash and residue from inside the boiler flue body 1 to the outside ground. The threaded sleeve 7 is connected to the canopy 9 via a rotating connection. During cleaning, the threaded sleeve 7 is driven to rotate in both directions by the drive motor 13. The threaded sleeve 7 is slidably connected to the boiler flue body 1 via two sets of limit blocks. As the threaded sleeve 7 rotates, it drives the ash removal assembly 10 to adjust its height. While the ash removal assembly 10 rises, the cleaning brush 1003 scrapes and cleans the ash from the inner wall of the boiler flue body 1. The falling dust automatically falls into the inverted conical interior of the collection bucket 1002, and then slides through the through hole, the semi-circular conveyor 1004, and the ash inlet trough onto the conveying auger 701 inside the threaded sleeve 7. As the threaded sleeve 7 rotates, the conveying auger 701 transports the cleaned ash to the top. One end of the threaded sleeve 7 extends to the top of the canopy 9 and has an ash outlet 12. The ash transported on is then discharged onto the canopy 9 through the ash outlet 12. The top of the outer protective cylinder 3 and the canopy 9 are both designed with a conical structure. Both ends of the ash channel cavity 301 are designed with an open type. The ash that falls onto the canopy 9 automatically slides into the interior of the ash channel cavity 301 and falls to the ground at the bottom along the limiting direction of the ash channel cavity 301.

[0048] In addition, a drive motor 13 is installed at one end of the threaded sleeve 7, extending above the canopy 9. The drive motor 13 is connected to an external controller via wires for easy control. A support plate is installed at the bottom of the drive motor 13, and the support plate is connected to the canopy 9 via four sets of support legs. The canopy 9 is fixedly connected to two sets of outer protective cylinders 3 by bolts. The bolt fixing method facilitates the disassembly and assembly of the canopy 9 and the boiler flue body 1. The inner water cavity 304 is connected to the water inlet pipe 14, the outer water cavity 302 is connected to the water outlet pipe 15, and the hot flue chamber 303 is connected to the flue pipe 16. The interiors of the outer water cavity 302 and the inner water cavity 304 are interconnected. The structure is designed so that cold water is first injected into the inner water cavity 304 through the water inlet pipe 14. The cold water inside the inner water cavity 304 is automatically poured into the outer water cavity 302, thus surrounding the hot flue gas cavity 303. The temperature of the cold water is conducted to the inner wall of the inner water cavity 304 through the outer wall of the boiler flue body 1, and the water is initially heated. Then, the water in the inner water cavity 304 and the outer water cavity 302 is preheated again by the temperature of the hot flue gas flow inside the hot flue gas cavity 303, and the heat energy of the boiler flue is recovered and utilized for a second time. The connection between the two sets of outer protective cylinders 3 is equipped with sealing rubber strips, which can increase the sealing of the splicing of the two sets of outer protective cylinders 3.

[0049] The workflow of this invention is as follows: When using this boiler flue heat recovery device, firstly, the connectors 4 of the two sets of outer protective cylinders 3 are correspondingly connected to the top of the boiler flue body 1. Then, the two sets of limiting components 6 are adjusted using the adjusting mechanism 5, so that the two sets of limiting protrusions 601 are correspondingly connected to the limiting grooves on the outer wall of the boiler flue body 1. Then, the two sets of outer protective cylinders 3 are spliced ​​and fixed to the outside of the heat recovery device body 2. The limiting effect of the connectors 4 and the limiting protrusions 601 increases the stability of the heat recovery device body 2 installation. Next, cold water is sequentially injected into the inner water chamber through the water inlet pipe 14. Inside the inner water chamber 304 and outer water chamber 302, during the use of the boiler flue body 1, the hot flue gas emitted from inside impacts and compresses the protective cover 801 and spring 803. After passing through the filter screen 802, the ash particles carried by the hot flue gas are adsorbed and filtered. Then, the filtered hot flue gas enters the hot flue gas chamber 303, conducting heat to the inner walls of the inner water chamber 304 and outer water chamber 302, thereby increasing the internal temperature of the inner water chamber 304 and outer water chamber 302. The toothed contact surface of the inner wall increases the contact area and improves the heat conduction effect, resulting in better heat conduction. Through the filtering effect of the filter screen 802, the hot flue gas in the hot flue gas chamber 304 is reduced. The ash adsorbed on the inner wall improves the cleanliness of the inner wall of the hot flue chamber 303. Simultaneously, as the inner wall of the boiler flue body 1 rises, heat is conducted to the inner wall that is in contact with the hot flue chamber 303, further increasing the temperature inside the hot flue chamber 303. This results in better heating of the water in the inner water chamber 304 and the outer water chamber 302, improving heating efficiency. The heated hot water flows out through the outlet pipe 15 for convenient use. Furthermore, the drive motor 13 drives the threaded sleeve 7 and the conveying auger 701 to rotate simultaneously, raising the ash removal assembly 10. At the same time, the cleaning brush 1003 cleans the inner wall of the boiler flue body 1. The adhering ash residue is cleaned and collected in a collection bucket 1002. It then slides onto a conveying auger 701 via two sets of semi-circular conveying components 1004. The rotating conveying auger 701 then transports the ash residue to the top of the canopy 9. Simultaneously, the ash residue automatically slides into the ash channel cavity 301 and then falls to the ground at the opening below. By cleaning the inner wall of the boiler flue, the heat transfer effect of the boiler flue to the inner water cavity 304 is ensured. The entire operation process is simple and convenient. Compared with existing boiler flue heat recovery devices, this invention improves the convenience and practicality of existing boiler flue heat recovery devices through design.

[0050] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A boiler flue heat recovery device, comprising a boiler flue body (1) and a heat recovery device body (2), wherein the heat recovery device body (2) is disposed on the outer side of the boiler flue body (1), characterized in that: The main body (2) of the heat recovery device is composed of two sets of outer protective cylinders (3). The two sets of outer protective cylinders (3) are provided with ash channel cavity (301), outer water cavity (302), hot smoke cavity (303) and inner water cavity (304) from the outside to the inside. The top of the inner end of the outer protective cylinder (3) is connected to the boiler flue body (1) through the plug-in part (4). The outer protective cylinder (3) is connected to the limiting component (6) through the adjustment mechanism (5). The hot smoke inlet (101) is provided inside the outer protective cylinder (3) and above the boiler flue body (1). The inner side of the hot smoke inlet (101) is provided with a protective component (8). The main body (2) of the heat recovery device is connected to the threaded sleeve (7) through the canopy (9). One end of the threaded sleeve (7) extends into the interior of the boiler flue body (1) and is connected to the ash cleaning component (10). The protective assembly (8) includes a protective cover (801), a filter screen (802), and a spring (803). The protective cover (801) is provided inside the hot smoke chamber (303) at a position corresponding to the hot smoke inlet (101). The filter screen (802) is provided on the outside of the protective cover (801). The protective cover (801) is connected to the filter screen (802) by the spring (803). The limiting component (6) includes a limiting protrusion (601) and a rubber pad (602). The bottom end of the outer protective cylinder (3) and the outer side of the boiler flue body (1) are provided with a limiting protrusion (601). The contact surface between the limiting protrusion (601) and the boiler flue body (1) is provided with a rubber pad (602). The adjustment mechanism (5) includes an adjustment rod (501) and a connecting rod (502). The adjustment rod (501) is rotatably connected to the bottom of the boiler flue body (1). The adjustment rod (501) is connected to the limiting protrusion (601) through the connecting rod (502). The cleaning assembly (10) includes a connector (1001), a collection bucket (1002), a cleaning brush (1003), and a semi-arc conveyor (1004). The threaded sleeve (7) is connected to the collection bucket (1002) through the connector (1001). A cleaning brush (1003) is provided at the connection between the collection bucket (1002) and the boiler flue body (1). Two sets of semi-arc conveyors (1004) are symmetrically arranged at the bottom of the collection bucket (1002) and on the outside of the threaded sleeve (7). The threaded sleeve (7) is provided with ash inlet grooves at the positions corresponding to the two sets of semi-arc conveying parts (1004). The threaded sleeve (7) is provided with a conveying auger (701). The connection between the connector (1001) and the threaded sleeve (7) is a threaded connection. The connection between the cleaning brush (1003) and the boiler flue body (1) is a sliding connection. The connection between the collection bucket (1002) and the two sets of semi-arc conveying components (1004) is designed with an inverted conical structure, and the bottom of the collection bucket (1002) and the corresponding positions of the two sets of semi-arc conveying components (1004) are provided with through holes.

2. The boiler flue heat recovery device according to claim 1, characterized in that: The outer water cavity (302) and the inner water cavity (304) are designed in a connected structure. The side walls inside the boiler flue body (1) and located between the inner water cavity (304) and the outer water cavity (302) are designed in a toothed structure.

3. The boiler flue heat recovery device according to claim 1, characterized in that: The protective cover (801) is a ring structure design, and the cross section of the protective cover (801) is hemispherical. The connection between the two sets of outer protective cylinders (3) is provided with sealing rubber strips.

4. The boiler flue heat recovery device according to claim 1, characterized in that: One end of the adjusting rod (501) extends to the outside of the boiler flue body (1) and is provided with a knob (11). The adjusting rod (501) has a limiting groove for the connecting rod (502) to slide inside. The limiting groove is spliced ​​together by multiple sets of X-shaped cross grooves. The end of the limiting protrusion (601) connected to the connecting rod (502) extends into the interior of the outer protective cylinder (3) and has a rectangular structure design. The limiting protrusion (601) and the outer protective cylinder (3) are connected by a sliding connection.

5. The boiler flue heat recovery device according to claim 1, characterized in that: One end of the threaded sleeve (7) extends to the top of the canopy (9) and is equipped with a drive motor (13). The bottom of the drive motor (13) is equipped with a support plate. The support plate is connected to the canopy (9) through four sets of support legs. The canopy (9) is fixedly connected to two sets of outer protective cylinders (3) by bolts.

6. The boiler flue heat recovery device according to claim 1, characterized in that: The top of the outer protective cylinder (3) and the canopy (9) are both designed with a conical structure. The threaded sleeve (7) is connected to the canopy (9) by a rotating connection. One end of the threaded sleeve (7) extends to the top of the canopy (9) and is provided with an ash outlet hole (12). Both ends of the ash channel cavity (301) are designed as open types.

7. The boiler flue heat recovery device according to claim 1, characterized in that: The inner water chamber (304) is connected to an inlet pipe (14), the outer water chamber (302) is connected to an outlet pipe (15), and the hot smoke chamber (303) is connected to an exhaust pipe (16).

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