Boiler waste heat recycling device

Abstract

The utility model belongs to the field of industrial boilers, and particularly relates to a boiler waste heat recycling device. The device comprises a working part, an air inlet part and a filtering assembly. And the working part is constructed to be capable of treating waste heat of the boiler. The gas inlet part comprises a conveying pipe which is communicated with the working part and is used for guiding flue gas generated by the boiler into the working part; the filtering assembly is connected to the free end of the conveying pipe and comprises a first clamping part and a second clamping part internally provided with a filtering mechanism. The filtering assembly is further constructed to be capable of filtering smoke flowing through the filtering assembly, and the second clamping part is constructed to be capable of being connected with or separated from the first clamping part through rotation. According to the device, the filtering assembly can be conveniently mounted and dismounted, and the maintenance and working efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the field of industrial boilers, and in particular relates to a boiler waste heat recovery and utilization device. Background Art

[0002] Existing boiler waste heat recovery and utilization devices generally have a filter pipe for filtering the flue gas on the flue gas delivery pipe, and a filter screen is provided on the filter pipe. After long-term use, the pipe body and filter screen of the filter pipe will be contaminated with a large amount of dust and other pollutants on the surface, which will cause the pipe body and filter screen to be blocked, and affect the filtering quality of the filter screen on the flue gas. Therefore, it is necessary to regularly disassemble the filter pipe to replace or clean the filter screen and pipe body. However, due to structural reasons, the existing boiler waste heat recovery and utilization device is not convenient for disassembling the filter pipe, or the disassembly process is relatively cumbersome, which reduces the working and maintenance efficiency of the equipment and imposes certain restrictions on the safe and efficient operation of the boiler waste heat recovery and utilization device. Utility Model Content

[0003] In view of the technical problems in the prior art that the boiler waste heat recovery device cannot conveniently install and disassemble the filter pipe or filter component, the utility model provides a boiler waste heat recovery device.

[0004] The boiler waste heat recovery and utilization device comprises:

[0005] A working part configured to process waste heat from the boiler;

[0006] an air intake portion, comprising a delivery pipe configured to communicate with the working portion and to introduce flue gas generated by the boiler into the working portion; and

[0007] The filter assembly is configured to be connected to the free end of the delivery pipe and includes a first clamping portion and a second clamping portion, wherein the second clamping portion includes a filter mechanism disposed therein.

[0008] The filter assembly is configured to filter the smoke flowing therethrough, and the second clamping portion is configured to be connected to or separated from the first clamping portion by rotation.

[0009] As an extension of the above technical solution, the present invention also provides the following embodiments:

[0010] The first clamping portion includes a first clamping tube configured to be connected to the delivery pipe, and a first clamping block arranged on the outside of the right end surface of the first clamping tube. The second clamping portion includes a second clamping tube and a second clamping block arranged on the outside of the left end surface of the second clamping tube. The second clamping block is configured to be able to connect or separate with the first clamping block in response to the rotation of the second clamping portion.

[0011] The first clamping portion includes a first clamping plate arranged on the outside of the right end surface of the first clamping tube, and the first clamping plate is constructed to be partially located between the first clamping tube and the first clamping block. The second clamping portion includes a second clamping plate arranged on the outside of the left end surface of the second clamping tube, and the second clamping plate is constructed to be partially located between the second clamping tube and the second clamping block.

[0012] The first clamping portion includes a positioning groove provided on the right end surface of the first clamping tube, and the second clamping portion includes a positioning column provided on the left end surface of the second clamping tube. The positioning column is configured to slide along the positioning groove.

[0013] The invention comprises a recovery box assembly which is arranged below the filter assembly and is configured to be connected to the working part. The recovery box assembly comprises a recovery box and a connecting assembly which is configured to connect the recovery box to the working part.

[0014] The connecting assembly includes a first connecting portion configured to be connected to the working portion, and a second connecting portion configured to be connected to the recovery box, wherein the second connecting portion is configured to be connected to or separated from the first connecting portion by rotation and sliding.

[0015] The first connecting part includes a sliding tube configured to be connected to the working part, and the second connecting part includes a sliding sleeve configured to be connected to the recovery box, and the sliding sleeve is configured to be able to be sleeved on the outside of the sliding tube and slide along the axial direction of the sliding tube, a sliding column is provided on the outer wall of the sliding tube, and an "L"-shaped sliding groove is provided at a position corresponding to the sliding column on the inner wall of the sliding sleeve, and the sliding column is configured to slide relatively in the sliding groove along the axial direction of the sliding sleeve until it encounters an obstacle, and can slide relatively along the circumferential direction of the sliding sleeve in response to the rotation of the second connecting part to realize the connection between the first connecting part and the second connecting part.

[0016] The connecting assembly includes a reset assembly, which includes a first reset mechanism arranged inside the sliding tube and a second reset mechanism arranged inside the sliding sleeve. The reset assembly is constructed to provide a buffering effect for the connection between the first connecting part and the second connecting part, and to provide a separation assist for the separation of the first connecting part and the second connecting part.

[0017] The first reset mechanism includes a telescopic rod configured to be connected to the working part and arranged inside the sliding tube, the second reset mechanism includes a fixed cylinder configured to be connected to the recovery box and located inside the sliding sleeve, a second spring arranged inside the fixed cylinder, and a limiting ring connected to the free end of the second spring, the limiting ring being configured to correspond to the position and shape of the free end of the telescopic rod.

[0018] The working part includes a working box constructed in a can-shaped structure and a smoke exhaust pipe arranged above the working box.

[0019] The advantages of the present invention compared to the prior art are:

[0020] By arranging the filter assembly as a split structure that can be assembled or separated by rotation, the filter assembly can be easily disassembled, thereby improving the maintenance and operation efficiency of the device.

[0021] The recycling bin assembly facilitates the collection of filter residues generated during operation, improving the working environment. Furthermore, the recycling bin assembly is detachable, making it easy to dump the filter residues inside the bin and ensuring the normal operation of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the structure of the boiler waste heat recovery device according to the present utility model;

[0023] Figure 2 is a structural diagram of the filter component;

[0024] Figure 3 A schematic diagram of the structure of the connected components.

[0025] All drawings in this utility model are schematic diagrams for explaining structures and principles, and are not necessarily drawn with actual sizes and proportions.

[0026] The specific meanings of the reference numerals in the figures are as follows:

[0027] 1. Working part; 11. Working box; 111. Observation window; 12. Smoke exhaust pipe; 13. Bottom plate; 14. Carrying block; 15. Cover plate; 16. Observation platform; 17. Ladder; 18. Electric switch; 2. Air intake; 21. Delivery pipe; 22. Fan; 3. Filter assembly; 31. First clamping part; 311. First clamping tube; 312. First clamping block; 313. First clamping plate; 314. Positioning groove; 32. Second clamping part; 321. Second clamping tube; 322. Second clamping block; 323. Filter mechanism; 324. Second clamping plate; 325. Positioning column; 4. Return Receiving box assembly; 41. Recovery box; 42. Connecting assembly; 421. First connecting part; 4211. Sliding tube; 4212. Sliding column; 422. Second connecting part; 4221. Sliding sleeve; 4222. Sliding groove; 423. Resetting assembly; 4231. First resetting mechanism; 42311. Telescopic rod; 423111. First part; 423112. Second part; 42312. First spring; 4232. Second resetting mechanism; 42321. Fixing cylinder; 42322. Second spring; 42323. Limiting ring; 43. Bracket; 100. Boiler waste heat recovery device. DETAILED DESCRIPTION

[0028] The embodiments of the present invention will be described in more detail below with reference to the accompanying drawings.

[0029] Figure 1 Schematic diagram of the structure of a boiler waste heat recovery device 100 (hereinafter referred to as device 100) according to the present invention. Figure 2 It is a schematic diagram of the structure of the filter assembly 3. As shown in the figure, the device 100 includes a working part 1, an air intake part 2 and a filter assembly 3. The working part 1 is configured to be able to recycle and process the boiler waste heat carried by the boiler flue gas. The air intake part 2 includes a conveying pipe 21 configured to be connected to the working part 1 and used to introduce the flue gas generated by the boiler into the working part 1. The filter assembly 3 is configured to be connected to the free end of the conveying pipe 21, including a first clamping part 31 directly connected to the conveying pipe 21 and a second clamping part 32 directly connected to the first clamping part 31, and the second clamping part 32 includes a filtering mechanism 323 arranged therein. The filter assembly 3 is also configured to be able to filter the flue gas flowing through it, and the second clamping part 32 is configured to be able to be connected or separated from the first clamping part 31 by rotation.

[0030] During operation, the second clamping portion 32 is connected to a heat-generating device such as a boiler (not shown). The flue gas carrying waste heat generated by the combustion of the boiler or other heat-generating device passes through the filter assembly 3 and the delivery pipe 21, and then enters the working portion 1. The working portion 1 processes the flue gas to recycle the waste heat of the boiler. The filter assembly 3 filters and purifies the flue gas. After long-term use, a large amount of dust and impurities accumulate within the filter assembly 3, and the filter assembly 3 needs to be disassembled, cleaned, and replaced. To do this, the operator first disconnects the heat-generating device such as the boiler from the filter assembly 3. Then, by rotating the second clamping portion 32, the second clamping portion 32 can be separated from the first clamping portion 31. The operator can then clean and replace the second clamping portion 32 (including the filter mechanism 323). After the second clamping portion 32 is processed, it is placed in a position corresponding to the first clamping portion 31 and the connection between the second clamping portion 32 and the first clamping portion 31 is completed by rotating the second clamping portion 32.

[0031] This design enables quick disassembly and installation of the filter assembly 3 , thereby improving the maintenance and operation efficiency of the device 100 .

[0032] Preferably, in some embodiments of the present invention, the filtering mechanism 323 is a filter net.

[0033] like Figure 2 As shown, in some embodiments of the present invention, the first clamping portion 31 includes a first clamping tube 311 configured to connect to the delivery tube 21, and a first clamping block 312 disposed on the outside of the right end surface of the first clamping tube 311. The second clamping portion 32 includes a second clamping tube 321 and a second clamping block 322 disposed on the outside of the left end surface of the second clamping tube 321. The second clamping block 322 is configured to connect or disconnect with the first clamping block 312 in response to the rotation of the second clamping portion 32. This design allows for quick connection and disconnection of the first clamping portion 31 and the second clamping portion 32.

[0034] Preferably, if Figure 2 As shown, in some embodiments of the present invention, the first clamping block 312 and the second clamping block 322 are both configured as "U"-shaped blocks, and the first clamping block 312 and the second clamping block 322 are respectively configured with their open ends facing the axis direction of the first clamping tube 311 and the second clamping tube 321. In addition, the first clamping block 312 is configured to have an outer profile larger than that of the second clamping block 322. This design allows the second clamping block 322 to be embedded in the interior of the first clamping block 312 to achieve connection with the first clamping block 312.

[0035] Preferably, if Figure 2As shown, in some embodiments of the present invention, there are two first engaging blocks 312, which are arranged circumferentially opposite each other on the outside of the right end surface of the first engaging tube 311 and are offset in the axial direction of the first engaging tube 311. There are also two second engaging blocks 322, which are arranged on the second engaging tube 321 in a manner that allows them to be embedded within the first engaging block 312. This design allows for a more secure engagement between the first engaging portion 31 and the second engaging portion 32, thereby improving the stability of the filter assembly 3 after assembly.

[0036] In some unshown embodiments of the present invention, the connection mode in which the first clamping block 312 is embedded in the second clamping block 322 can be achieved by constructing the first clamping block 312 to have an external contour smaller than the second clamping block 322, swapping the positions of the first clamping block 312 and the second clamping block 322, etc.

[0037] like Figure 2 As shown, in some embodiments of the present invention, the first clamping portion 31 includes a first clamping plate 313 disposed outside the right end surface of the first clamping tube 311. The first clamping plate 313 is configured to be partially located between the first clamping tube 311 and the first clamping block 312. The second clamping portion 32 includes a second clamping plate 324 disposed outside the left end surface of the second clamping tube 321. The second clamping plate 324 is configured to be partially located between the second clamping tube 321 and the second clamping block 322. This design allows the first clamping portion 31 and the second clamping portion 32 to be positioned more quickly and accurately under the guidance of the first clamping plate 313 and the second clamping plate 324, and enables a more secure clamping effect between the first clamping portion 31 and the second clamping portion 32.

[0038] Preferably, if Figure 2 As shown, in some embodiments of the present invention, in order to correspond to the embodiment with two first clamping blocks 312 and the second clamping blocks 322, so as to improve the stability and firmness of the connection and disassembly process, the number of the first clamping plate 313 and the second clamping plate 324 are both two, and are respectively distributed in a 180° rotational symmetrical manner relative to the axis of the first clamping tube 311 and the second clamping tube 321.

[0039] like Figure 2As shown, in some embodiments of the present invention, the first engaging portion 31 includes a positioning groove 314 disposed on the right end surface of the first engaging tube 311. The second engaging portion 32 includes a positioning post 325 disposed on the left end surface of the second engaging tube 321. The positioning post 325 is configured to slide along the positioning groove 314. Through this design, the mutual matching and movement of the positioning post 325 and the positioning groove 314 achieve more accurate positioning and smoother rotation of the first engaging portion 31 and the second engaging portion 32, thereby improving the smoothness of the operation when engaging or disengaging the first engaging portion 31 and the second engaging portion 32, thereby enhancing work efficiency.

[0040] Preferably, the positioning slot 314 is constructed to have a length that is at least sufficient to ensure that when the positioning column 325 slides to the end point at one end of the positioning slot 314, the second clamping block 322 is completely embedded in the interior of the first clamping block 312, and when the positioning column 325 slides to the end point at the other end of the positioning slot 314, the second clamping block 322 is completely disengaged from the first clamping block 312.

[0041] Preferably, if Figure 2 As shown, in some embodiments of the present invention, in order to correspond to the embodiments having two first clamping blocks 312 and a second clamping block 322, two first clamping plates 313 and a second clamping plate 324, so as to improve the stability and firmness of the connection and disassembly process, the number of positioning grooves 314 and positioning columns 325 are both two, and the positioning grooves 314 are distributed in a 180° rotational symmetrical manner relative to the axis of the first clamping tube 311, and the positioning columns 325 are distributed in a symmetrical manner relative to the axis of the second clamping tube 321.

[0042] In some unillustrated embodiments of the present invention, the positions of the positioning groove 314 and the positioning post 325 can be swapped, that is, the positioning groove 314 can be set on the second card tube 321, and the positioning post 325 can be set on the first card tube 311.

[0043] like Figure 1 As shown, in some embodiments of the present invention, the device 100 includes a recovery box assembly 4 disposed below the filter assembly 3 and configured to be connected to the working portion 1. The recovery box assembly 4 includes an upwardly open recovery box 41 and a connecting assembly 42 configured to connect the recovery box 1 to the working portion 1. This design facilitates the collection of filtered residue during operation of the device 100, improving the working environment. Furthermore, the recovery box assembly 4 is configured to be detachable by providing the connecting assembly 42, facilitating the dumping of filtered residue within the recovery box 41 and ensuring the normal operation of the device 100.

[0044] like Figure 3As shown, in some embodiments of the present invention, the connecting assembly 42 includes a first connecting portion 421 and a second connecting portion 422. The first connecting portion 421 is configured to connect to the working portion 1, and the second connecting portion 422 is configured to connect to the recovery box 41. The second connecting portion 422 is configured to connect to and disconnect from the first connecting portion 421 through rotation and sliding. This design facilitates the connection and disconnection of the recovery box 41 from the working portion 1, improving the operation and maintenance efficiency of the device 100.

[0045] Preferably, if Figure 3 As shown, in some embodiments of the present invention, the first connecting portion 421 includes a sliding tube 4211 configured to connect to the working portion 1, and the second connecting portion 422 includes a sliding sleeve 4221 configured to connect to the recovery box 41. The sliding sleeve 4221 is configured to be sleeved onto the exterior of the sliding tube 4211 and to slide along the axial direction of the sliding tube 4211. A sliding post 4212 is provided on the outer wall of the sliding tube 4211, and an L-shaped sliding groove 4222 is provided on the inner wall of the sliding sleeve 4221 at a position corresponding to the sliding post 4212. The sliding post 4212 is configured to slide relative to the sliding sleeve 4221 in the axial direction within the sliding groove 4222 until encountering an obstacle. Upon encountering an obstacle, the sliding post 4212 can then slide relative to the sliding sleeve 4221 in the circumferential direction in response to the rotation of the second connecting portion 422, thereby engaging with the portion of the sliding groove 4222 perpendicular to the axial direction of the sliding sleeve 4221, thereby connecting the first connecting portion 421 to the second connecting portion 422. If the first connection portion 421 and the second connection portion 422 need to be separated, the above steps can be performed in reverse.

[0046] More preferably, Figure 3 As shown, in order to improve the stability and reliability of the operation of the connecting assembly 42, in some embodiments of the present invention, the number of sliding posts 3212 is multiple and evenly distributed along the circumference of the sliding tube 4211. Correspondingly, the number of sliding grooves 4222 is the same as the number of sliding posts 3212 and is evenly distributed along the circumference of the sliding sleeve 4221.

[0047] like Figure 3 As shown, in some embodiments of the present invention, the connecting assembly 42 includes a reset assembly 423. The reset assembly 423 includes a first reset mechanism 4231 and a second reset mechanism 4232. The first reset mechanism 4231 is disposed within the sliding tube 4211, and the second reset mechanism 4232 is disposed within the sliding sleeve 4221. Furthermore, the reset assembly 423 is configured to provide a buffering effect for the connection between the first connecting portion 421 and the second connecting portion 422, and to assist in the separation of the first connecting portion 421 and the second connecting portion 422. This design allows the recovery box 1 to be connected and disconnected from the working portion 1 more conveniently and quickly.

[0048] Preferably, if Figure 3 As shown, in some embodiments of the present invention, the first reset mechanism 4231 includes a telescopic rod 42311 configured to connect to the working part 1 and disposed within the sliding tube 4211. The second reset mechanism 4232 includes a fixed cylinder 42321 configured to connect to the recovery box 41 and disposed within the sliding sleeve 4221, a second spring 42322 disposed within the fixed cylinder 42321, and a retaining ring 42323 connected to the free end of the second spring 42322. The retaining ring 42323 is configured to correspond to the position and shape of the free end of the telescopic rod 42313. During operation, when the recovery box 41 is connected to the working part 1, the cooperation between the telescopic rod 42311 and the retaining ring 42323, as well as the buffering effect of the elastic force of the telescopic rod 42311 and the second spring 42322, makes the connection between the recovery box 41 and the working part 1 smoother, avoids the possibility of strong rigid collisions between different components, and protects the device 100. When the recycling box 41 is separated from the working part 1 , the telescopic rod 42311 and the second spring 42322 assist the separation movement to a certain extent, which is conducive to achieving smooth and rapid separation between the recycling box 41 and the working part 1 .

[0049] Preferably, in some embodiments of the present invention, the telescopic rod 42311 includes a first portion 423111 having a hollow cylindrical structure configured to connect to the working portion 1, a second portion 423112 having an inner diameter no smaller than the outer diameter of the first portion 423111 and movably disposed at the free end of the first portion 423111, and a third spring (not shown) disposed within the first and second portions 423111 and 423112. The second portion 423112 is configured to have a larger outer profile to correspond to the shape of the retaining ring 42323, thereby acting as a retaining ring. Obviously, the second portion 423112 serves as the free end of the telescopic rod 42311. When the recovery box 41 is connected to the working portion 1, a force acts on the second portion 423112, which compresses the third spring and moves downward, thereby causing the telescopic rod 42311 to retract.

[0050] Preferably, if Figure 3As shown, in some embodiments of the present invention, the second reset mechanism 4232 includes a first spring 42312 that is sleeved on the outside of the telescopic rod 42311. One end of the first spring 42312 is connected to the left side of the second part 423112, and the other end is in a free state in the initial state. During the connection process, when the second part 423112 is compressed to a certain extent, the free end of the first spring 42312 contacts the working part 1, and the first spring 42312 also contracts as the external force increases. Through this design, multiple springs can be used to provide greater elastic force in the second half of the connection process or the early stage of the separation process, thereby providing more effective buffering or greater separation assistance for the connection or separation process of the first connecting part 421 and the second connecting part 422, ensuring that the connection or separation process is carried out smoothly and steadily.

[0051] In some unillustrated embodiments of the present invention, the connection relationships between the first connection portion 421 and the second connection portion 422 and the working portion 1 and the recovery box 41 can be swapped.

[0052] In some unillustrated embodiments of the present invention, the connection relationships between the first reset mechanism 4231 and the second reset mechanism 4232 and the working part 1 and the recovery box 41 can be swapped.

[0053] like Figure 1 As shown, in some embodiments of the present invention, the air intake portion 2 includes a fan 22 provided on the delivery pipe 21 for delivering the smoke inside the delivery pipe 21 into the working portion 1 .

[0054] like Figure 1 As shown, in some embodiments of the present invention, the working part 1 includes a working box 11 having a can-shaped structure and a smoke exhaust pipe 12 disposed above the working box 11. It should be noted that the working box 11 can be any device in the prior art that can recover and utilize boiler waste heat. Its specific structure and operating principle are well known to those skilled in the art and will not be described in detail here.

[0055] In some embodiments of the present invention, components for treating the flue gas, such as an activated carbon filter plate (not shown), are provided inside the working box 11 .

[0056] like Figure 1 As shown, in some embodiments of the present invention, the working part 1 includes a bottom plate 13 having a plate-like structure and a supporting block 14 disposed above the bottom plate 13. The working box 11 is disposed on the supporting block 14. This design increases the stability of the placement of the working box 11 and helps the device 100 maintain a stable working state.

[0057] like Figure 1As shown, in some embodiments of the present invention, the recovery box assembly 4 includes a bracket 43 configured to be connected between the recovery box 41 and the bottom plate 13 . The setting of the bracket 43 provides a stable support for the recovery box 41 .

[0058] like Figure 1 As shown, in some embodiments of the present invention, an observation window 111 is provided at the top of the work box 11 to facilitate observation of the interior of the work box 11 by a staff member. A cover plate 15 is provided on the observation window 111. When observation of the interior of the work box 11 is not required, the cover plate 15 can be placed over the observation window 111 to keep the work box 11 relatively closed. An observation platform 16 is provided next to the observation window 111 for staff to stay on. A ladder 17 is provided next to the observation platform 16, extending from the observation platform 16 to the base plate 13. An electric switch 18 for controlling the work box 11 is provided on the side wall of the work box 11.

[0059] According to the device 100 of the present invention, the design of the filter component 3 and the recovery box component 4 that are easy to disassemble realizes the convenient installation and disassembly of the filter component 3 and the recovery box component 4, improves the working, repair and maintenance efficiency of the device 100, and ensures the normal operation of the device 100.

[0060] The directional terms mentioned in this utility model, such as "upper", "lower", "left", "right", "center", "side", "side", "top", "bottom", "front", "back", etc., are for reference only. Figure 1 direction.

[0061] Finally, it should be noted that while the present invention has been described in detail with reference to preferred embodiments, various modifications may be made and components may be substituted with equivalents without departing from the scope of the present invention. In particular, the various technical features described in the various embodiments may be combined in any manner, provided there are no structural conflicts. The present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A boiler waste heat recovery device, characterized in that: include: A working part (1) is configured to process waste heat from the boiler; An air intake portion (2) includes a delivery pipe (21) configured to communicate with the working portion (1) and to introduce flue gas generated by the boiler into the working portion (1); as well as The filter assembly (3) is configured to be connected to the free end of the delivery pipe (21), and comprises a first clamping portion (31) and a second clamping portion (32), wherein the second clamping portion (32) comprises a filter mechanism (323) disposed therein. The filter assembly (3) is configured to filter the smoke flowing therethrough, and the second clamping portion (32) is configured to be connected to or separated from the first clamping portion (31) by rotation.

2. The boiler waste heat recovery device according to claim 1, characterized in that: The first clamping portion (31) comprises a first clamping tube (311) configured to be connected to the delivery tube (21), and a first clamping block (312) arranged on the outside of the right end surface of the first clamping tube (311); the second clamping portion (32) comprises a second clamping tube (321) and a second clamping block (322) arranged on the outside of the left end surface of the second clamping tube (321); the second clamping block (322) is configured to be connected to or separated from the first clamping block (312) in response to the rotation of the second clamping portion (32).

3. The boiler waste heat recovery device according to claim 2, characterized in that: The first clamping portion (31) includes a first clamping plate (313) arranged on the outside of the right end surface of the first clamping tube (311), and the first clamping plate (313) is configured to be partially located between the first clamping tube (311) and the first clamping block (312). The second clamping portion (32) includes a second clamping plate (324) arranged on the outside of the left end surface of the second clamping tube (321), and the second clamping plate (324) is configured to be partially located between the second clamping tube (321) and the second clamping block (322).

4. The boiler waste heat recovery device according to claim 3, characterized in that: The first clamping portion (31) includes a positioning groove (314) provided on the right end surface of the first clamping tube (311), and the second clamping portion (32) includes a positioning column (325) provided on the left end surface of the second clamping tube (321), and the positioning column (325) is configured to be able to slide along the positioning groove (314).

5. The boiler waste heat recovery device according to any one of claims 1 to 4, characterized in that: The invention comprises a recovery box assembly (4) arranged below the filter assembly (3) and configured to be connected to the working part (1); the recovery box assembly (4) comprises a recovery box (41) and a connection assembly (42) configured to be able to connect the recovery box (41) to the working part (1).

6. The boiler waste heat recovery device according to claim 5, characterized in that: The connecting assembly (42) includes a first connecting portion (421) configured to be connected to the working portion (1), and a second connecting portion (422) configured to be connected to the recovery box (41), wherein the second connecting portion (422) is configured to be connected to or separated from the first connecting portion (421) by rotation and sliding.

7. The boiler waste heat recovery device according to claim 6, characterized in that: The first connecting portion (421) includes a sliding tube (4211) configured to be connected to the working portion (1), and the second connecting portion (422) includes a sliding sleeve (4221) configured to be connected to the recovery box (41). The sliding sleeve (4221) is configured to be sleeved on the outside of the sliding tube (4211) and to slide along the axial direction of the sliding tube (4211). A sliding column (4212) is provided on the outer wall of the sliding tube (4211). An L-shaped sliding groove (4222) is provided on the inner wall at a position corresponding to the sliding column (4212). The sliding column (4212) is configured to slide relatively in the sliding groove (4222) along the axial direction of the sliding sleeve (4221). When encountering an obstacle, it can slide relatively along the circumferential direction of the sliding sleeve (4221) in response to the rotation of the second connecting part (422) to achieve the connection between the first connecting part (421) and the second connecting part (422).

8. The boiler waste heat recovery device according to claim 7, characterized in that: The connecting assembly (42) includes a reset assembly (423), and the reset assembly (423) includes a first reset mechanism (4231) arranged inside the sliding tube (4211) and a second reset mechanism (4232) arranged inside the sliding sleeve (4221). The reset assembly (423) is constructed to provide a buffering effect for the connection between the first connecting part (421) and the second connecting part (422), and to provide a separation assist for the separation of the first connecting part (421) and the second connecting part (422).

9. The boiler waste heat recovery device according to claim 8, characterized in that: The first reset mechanism (4231) includes a telescopic rod (42311) configured to be connected to the working part (1) and arranged inside the sliding tube (4211); the second reset mechanism (4232) includes a fixed cylinder (42321) configured to be connected to the recovery box (41) and located inside the sliding sleeve (4221); a second spring (42322) arranged inside the fixed cylinder (42321); and a limiting ring (42323) connected to the free end of the second spring (42322); the limiting ring (42323) is configured to correspond to the position and shape of the free end of the telescopic rod (42311).

10. The boiler waste heat recovery device according to claim 9, characterized in that: The working part (1) comprises a working box (11) constructed as a can-shaped structure and a smoke exhaust pipe (12) arranged above the working box (11).

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