Efficient integrated flue gas waste heat recovery system

Abstract

The invention discloses an efficient integrated flue gas waste heat recovery system, and relates to the field of waste heat recovery systems, the efficient integrated flue gas waste heat recovery system comprises a heat preservation water tank used for storing hot water, and a water outlet of the heat preservation water tank is connected with water utilization equipment through a water utilization pipeline; the heat exchange module is composed of two end covers, a plurality of heat exchange assemblies arranged side by side and a plurality of quick release structures for splicing every two adjacent heat exchange assemblies together, and each heat exchange assembly comprises a supporting bracket and a U-shaped heat exchange coil arranged on the supporting bracket in a penetrating manner; the heat exchange assemblies are composed of the supporting supports and the U-shaped heat exchange coil pipes, modular design is adopted, the heat exchange assemblies are used in cooperation with the quick release structure, the heat exchange assemblies of different numbers can be assembled together according to use requirements to form heat exchange modules of different specifications, use is flexible, manufacturers can purchase the heat exchange modules according to the requirements, and the heat exchange modules are convenient to use. And the heat exchange assembly which cannot be normally used can be conveniently replaced, and only a single U-shaped heat exchange coil pipe is arranged in the heat exchange assembly, so that the subsequent cleaning difficulty can be obviously reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of waste heat recovery systems, and particularly to an efficiently integrated flue gas waste heat recovery system. Background Art

[0002] Currently, in some industrial production processes, a large amount of flue gas containing heat is generated. For example, in order to improve the energy utilization rate and achieve the purpose of energy conservation and consumption reduction, factories will recover the heat of the flue gas containing waste heat.

[0003] In the prior art, a heat exchanger is used in the flue gas waste heat recovery system to recover and utilize the waste heat of the flue gas. The flue gas enters the interior of the shell of the heat exchanger through the inlet pipe. Inside the shell, the flue gas comes into contact with the heat exchange tubes, transfers heat to the heat exchange tubes, and the heat is transferred to the heated fluid through the heat exchange tubes. During the process of the heated fluid flowing in the heat exchange tubes, it continuously absorbs the heat in the flue gas and the temperature gradually rises, and then flows out of the heat exchanger through the outlet pipe and enters the external system for utilization. Therefore, the heat conduction performance of the heat exchange tubes is crucial for the waste heat recovery of the flue gas.

[0004] However, in the actual use process, due to the presence of impurities (such as dust and tar) in the flue gas, inevitably, some impurities will adhere to the inner wall of the heat exchange tubes after the flue gas enters the heat exchanger. Over time, this will lead to a decrease in the heat conduction efficiency of the heat exchange tubes, and in order to recover the waste heat to the greatest extent, multiple rows of heat exchange tubes are arranged in the shell, which also increases the cleaning difficulty of the heat exchange tubes. Summary of the Invention

[0005] To solve the defects existing in the prior art, the present invention provides an efficiently integrated flue gas waste heat recovery system.

[0006] To solve the above technical problems, the present invention provides the following technical solutions:

[0007] An efficiently integrated flue gas waste heat recovery system of the present invention includes a heat preservation water tank for storing hot water, and the water outlet of the heat preservation water tank is connected to a water-using device through a water-using pipeline;

[0008] A heat exchange module, which is composed of two end covers, a plurality of heat exchange components arranged side by side, and a plurality of quick-release structures for splicing two adjacent heat exchange components together. The heat exchange component includes a support bracket and a U-shaped heat exchange coil pipe penetrating through the support bracket. The water inlet of the U-shaped heat exchange coil pipe at the head end is connected to a water inlet pump through an inlet pipeline, and the water outlet of the U-shaped heat exchange coil pipe at the tail end is connected to the water inlet of the heat preservation water tank through an outlet pipeline;

[0009] The quick-release structure includes a U-shaped positioning seat, a support square tube for connecting two U-shaped positioning seats, and a limiting component. An installation cavity is formed on the protruding part of the U-shaped positioning seat. A quick-release component is arranged in the installation cavity, and a sealing plate is arranged on one side of the installation cavity.

[0010] As a preferred technical solution of the present invention, the quick-release component includes a T-shaped transmission plate and a positioning rod fixed on the sealing plate. Two symmetrically distributed connecting columns are arranged on one side of the T-shaped transmission plate. A through hole that is slidably matched with the positioning rod is also formed on the T-shaped transmission plate. The through hole is located between the two connecting columns. A transmission rod is arranged on one side of the through hole. The transmission rod is fixed on the T-shaped transmission plate, and a buffer spring is sleeved outside the transmission rod.

[0011] A pressing spring is sleeved outside the positioning rod. The pressing spring is located between the T-shaped transmission plate and the sealing plate.

[0012] As a preferred technical solution of the present invention, two sliding through holes that are slidably matched with the connecting columns are communicated and arranged on one side of the installation cavity. A through hole that is communicated with the installation cavity and can allow the transmission rod to pass through is arranged on one side of the two sliding through holes.

[0013] As a preferred technical solution of the present invention, the limiting component includes a movable rod, a sliding block that is connected to the transmission rod and can slide in the support square tube, an anti-slip cap located outside the support square tube, and a fastening bolt for connecting the movable rod and the anti-slip cap. A receiving hole is formed on the sliding block. A limiting plate that is slidably matched with the receiving hole is arranged at one end of the movable rod, and a threaded blind hole that is screwed with the fastening bolt is formed at the other end. A return spring that is clamped between the inner wall of the support square tube and the limiting plate is also sleeved outside the movable rod, and a locking block is fixed on one side of the anti-slip cap.

[0014] As a preferred technical solution of the present invention, a strip-shaped through hole that is slidably matched with the movable rod is formed on the support square tube. Two C-shaped locking holes for fixing the locking block are communicated and arranged on one side of the strip-shaped through hole.

[0015] As a preferred technical solution of the present invention, the support bracket includes two support vertical frames and a connecting cross plate for connecting the support vertical frames. Connecting through holes that are inserted with the connecting columns are formed at both the upper and lower ends of the support vertical frames, and a plurality of positioning blocks distributed side by side are arranged on one side of the connecting cross plate.

[0016] As a preferred technical solution of the present invention, a plurality of positioning chutes are formed on one side of the U-shaped positioning seat opposite to the protruding part, and the positioning blocks are slidably matched with the positioning chutes.

[0017] As a preferred technical solution of the present invention, the heat exchange module further includes a plurality of U-shaped elbows, and adjacent U-shaped heat exchange coils are communicated through the U-shaped elbows.

[0018] As a preferred technical solution of the present invention, the heat exchange module further includes two connection frames for connecting with the end covers, one of the connection frames is fixed to one side of the support bracket at the head end, and the other connection frame is fixed to one side of the support bracket at the tail end.

[0019] The beneficial effects of the present invention are as follows:

[0020] 1. For this highly integrated flue gas waste heat recovery system, the heat exchange component is composed of a support bracket and a U-shaped heat exchange coil, and a modular design is adopted. When used in conjunction with a quick-release structure, heat exchange components with different quantities can be assembled together according to usage needs to form heat exchange modules of different specifications. It is not only flexible in use, allowing manufacturers to purchase according to demand, but also convenient for replacing heat exchange components that cannot be used normally. Moreover, only a single U-shaped heat exchange coil is provided in the heat exchange component, which can significantly reduce the subsequent cleaning difficulty.

[0021] 2. For this highly integrated flue gas waste heat recovery system, the T-shaped drive plate is driven to move by the drive rod, and the connecting column is driven by the moving T-shaped drive plate to insert into or disengage from the connecting through hole, so that the heat exchange component can be fixed. The operation is very convenient, and the assembly and disassembly of the heat exchange component can be quickly completed, thus saving the time for cleaning the U-shaped heat exchange coil.

[0022] 3. For this highly integrated flue gas waste heat recovery system, the T-shaped drive plate is supported by the abutting spring against the T-shaped drive plate, making the T-shaped drive plate more stable, effectively avoiding the situation where the connecting column disengages from the connecting through hole due to shaking or other reasons, so that the heat exchange component can be fixed more stably.

[0023] 4. For this highly integrated flue gas waste heat recovery system, by pulling the anti-slip cap outwards to make the locking block disengage from the current C-shaped locking hole, the limiting plate squeezes the return spring, and then the anti-slip cap is moved to drive the sliding block by the movable rod with the help of the limiting plate, and then the drive rod is moved to control the movement of the connecting column. When the movable rod cannot move further, the locking block also aligns with another C-shaped locking hole, and then the force pulling the anti-slip cap is removed. Driven by the elastic force of the return spring, the locking block inserts into another C-shaped locking hole, which can lock the movable rod while stabilizing the connecting column.

[0024] 5. For this highly integrated flue gas waste heat recovery system, the provided return spring plays a reset role. When the return spring is always in a compressed state, it can also be used to stabilize the anti-slip cap, effectively avoiding the situation where the locking block disengages from the C-shaped locking hole due to shaking or other reasons, which is beneficial to improving the reliability of the quick-release structure.

[0025] 6. For this highly efficient integrated flue gas waste heat recovery system, when cleaning the U-shaped heat exchange coil, the end cover does not need to be removed, further saving time. Brief Description of the Drawings

[0026] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0027] Figure 1 is a schematic structural diagram of a highly efficient integrated flue gas waste heat recovery system of the present invention;

[0028] Figure 2 is a schematic structural diagram of a heat exchange module of a highly efficient integrated flue gas waste heat recovery system of the present invention;

[0029] Figure 3 is a schematic structural diagram of the quick-release structure and the connection structure of the heat exchange components of a highly efficient integrated flue gas waste heat recovery system of the present invention;

[0030] Figure 4 is a schematic structural diagram of the quick-release structure and the heat exchange components of a highly efficient integrated flue gas waste heat recovery system of the present invention;

[0031] Figure 5 is a schematic structural diagram of the connection structure between the quick-release component and the limit component of a highly efficient integrated flue gas waste heat recovery system of the present invention;

[0032] Figure 6 is a schematic structural diagram of the quick-release component of a highly efficient integrated flue gas waste heat recovery system of the present invention;

[0033] Figure 7 is a schematic structural diagram of the C-shaped positioning seat of a highly efficient integrated flue gas waste heat recovery system of the present invention;

[0034] Figure 8 is a schematic internal structure diagram of the support square tube of a highly efficient integrated flue gas waste heat recovery system of the present invention;

[0035] Figure 9 is a schematic structural diagram of the limit component of a highly efficient integrated flue gas waste heat recovery system of the present invention;

[0036] Figure 10 is a first perspective three-dimensional sectional view of the support square tube of a highly efficient integrated flue gas waste heat recovery system of the present invention;

[0037] Figure 11 is a second perspective three-dimensional sectional view of the support square tube of a highly efficient integrated flue gas waste heat recovery system of the present invention.

[0038] In the figure: 1, heat preservation water tank; 2, U-shaped positioning seat; 21, sealing plate; 22, installation cavity; 23, through hole; 24, positioning sliding groove; 25, sliding through hole; 3, end cover; 4, water inlet water pump; 5, connecting frame body; 6, U-shaped elbow pipe; 7, heat exchange component; 71, connecting cross plate; 72, U-shaped heat exchange coiled pipe; 73, connecting through hole; 74, supporting vertical frame; 75, positioning block; 8, quick-release component; 81, T-shaped transmission plate; 82, positioning rod; 83, connecting column; 84, abutting spring; 85, buffer spring; 86, transmission rod; 9, supporting square pipe; 91, strip-shaped through hole; 92, C-shaped locking hole; 10, limiting component; 101, sliding block; 102, accommodating hole; 103, limiting plate; 104, movable rod; 105, threaded blind hole; 106, fastening bolt; 107, anti-slip cap; 108, return spring; 109, locking block. Detailed implementation manners

[0039] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only for the purpose of illustrating and explaining the present invention, and are not used to limit the present invention.

[0040] Embodiment: As Figures 1 - 5 shown, an efficient integrated flue gas waste heat recovery system of the present invention includes a heat preservation water tank 1 for storing hot water, and the water outlet of the heat preservation water tank 1 is connected to a water using device through a water using pipeline;

[0041] A heat exchange module, which is composed of two end covers 3, a plurality of heat exchange components 7 arranged side by side, and a plurality of quick-release structures for splicing two adjacent heat exchange components 7. The heat exchange component 7 includes a support bracket and a U-shaped heat exchange coiled pipe 72 penetrating through the support bracket. The water inlet of the U-shaped heat exchange coiled pipe 72 at the head end is connected with a water inlet water pump 4 through a water inlet pipeline, and the water outlet of the U-shaped heat exchange coiled pipe 72 at the tail end is connected to the water inlet of the heat preservation water tank 1 through a water outlet pipeline;

[0042] The quick-release structure includes a U-shaped positioning seat 2, a supporting square pipe 9 for connecting two U-shaped positioning seats 2, and a limiting component 10. An installation cavity 22 is opened on the convex part of the U-shaped positioning seat 2. A quick-release component 8 is arranged in the installation cavity 22, and a sealing plate 21 is arranged on one side of the installation cavity 22.

[0043] Specifically, a ventilation opening is arranged on the end cover 3 to facilitate the entry and exit of flue gas.

[0044] In this embodiment, the heat exchange component 7 is composed of a supporting bracket and a U-shaped heat exchange coil 72, and adopts a modular design. When used in conjunction with a quick-release structure, multiple heat exchange components 7 can be assembled together to form a large heat exchange structure. Therefore, different numbers of heat exchange components 7 can be assembled together to form heat exchange modules of different specifications as needed. Therefore, it is flexible to use and manufacturers can purchase it on demand. Only a single U-shaped heat exchange coil 72 is provided in the heat exchange component 7, which can significantly reduce the difficulty of subsequent cleaning.

[0045] In this embodiment, the sealing plate 21 can be connected to the 匚-shaped positioning seat 2 using bolts. The sealing plate 21 can not only be used to support the quick-release assembly 8, but also seal the installation cavity 22 to prevent the quick-release assembly 8 from being accelerated damaged due to collision.

[0046] In this embodiment, the U-shaped positioning seat 2 and the supporting square tube 9 together constitute a mounting bracket for accommodating the heat exchange component 7.

[0047] Among them, Figure 5 and Figure 6 As shown, the quick release assembly 8 includes a T-shaped transmission plate 81 and a positioning rod 82 fixed on the sealing plate 21, two symmetrically distributed connecting columns 83 are provided on one side of the T-shaped transmission plate 81, and a through hole slidably matched with the positioning rod 82 is also opened on the T-shaped transmission plate 81, and the through hole is located between the two connecting columns 83. A transmission rod 86 is provided on one side of the through hole, and the transmission rod 86 is fixed on the T-shaped transmission plate 81. A buffer spring 85 is also sleeved on the transmission rod 86. The setting of the buffer spring 85 is conducive to improving the stability of the transmission rod 86 when it moves;

[0048] The positioning rod 82 is provided with a retaining spring 84 on its outer sleeve, and the retaining spring 84 is located between the T-shaped transmission plate 81 and the sealing plate 21 .

[0049] The T-shaped transmission plate 81 is driven to move by the transmission rod 86, and the moving T-shaped transmission plate 81 drives the connecting column 83 to be inserted into the connecting through hole 73 or detached from the connecting through hole 73, so that the heat exchange component 7 can be fixed. The operation is very convenient, and the assembly and disassembly of the heat exchange component 7 can be completed quickly, thereby saving time for cleaning the U-shaped heat exchange coil 72.

[0050] In this embodiment, the clamping spring 84 is always in a compressed state. The clamping spring 84 presses against the T-shaped transmission plate 81 to support the T-shaped transmission plate 81, making the T-shaped transmission plate 81 more stable. This can effectively prevent the connecting column 83 from being separated from the connecting through hole 73 due to shaking or the like, thereby making the heat exchange component 7 more stably fixed.

[0051] Among them, Figure 5 and Figure 7As shown, two sliding through holes 25 that are slidably engaged with the connecting column 83 are communicated and provided on one side of the installation cavity 22. A through hole 23 that is communicated with the installation cavity 22 and allows the transmission rod 86 to pass through is provided on one side of the two sliding through holes 25. The arrangement of the sliding through holes 25 facilitates the insertion of the connecting column 83 into the connecting through hole 73. The provided through hole 23 is used to allow the transmission rod 86 to enter the support square tube 9 and be connected to the sliding block 101.

[0052] Among them, as Figure 5 , Figure 8 and Figure 9 shown, the limiting assembly 10 includes a movable rod 104, a sliding block 101 that is connected to the transmission rod 86 and can slide within the support square tube 9, an anti-slip cap 107 located outside the support square tube 9, and a fastening bolt 106 used to connect the movable rod 104 and the anti-slip cap 107. A receiving hole 102 is formed on the sliding block 101. A limiting plate 103 that is slidably engaged with the receiving hole 102 is provided at one end of the movable rod 104, and a threaded blind hole 105 that is screwed with the fastening bolt 106 is formed at the other end. A return spring 108 that is clamped between the inner wall of the support square tube 9 and the limiting plate 103 is also sleeved outside the movable rod 104. And a locking block 109 is fixed on one side of the anti-slip cap 107. The provided return spring 108 plays a resetting role. When the return spring 108 is always in a compressed state, it can also be used to stabilize the anti-slip cap 107, which can effectively avoid the situation where the locking block 109 disengages from the C-shaped locking hole 92 due to shaking or other reasons, and is beneficial to improving the reliability of the quick-release structure.

[0053] Pull the anti-slip cap 107 outwards to make the locking block 109 disengage from the current C-shaped locking hole 92. Squeeze the return spring 108 through the limiting plate 103, and then move the anti-slip cap 107 to make the movable rod 104 move along the strip-shaped through hole 91. The movable rod 104 drives the sliding block 101 by means of the limiting plate 103, and further makes the transmission rod 86 move. Until the movable rod 104 can no longer move, the locking block 109 also aligns with another C-shaped locking hole 92. Then remove the force pulling the anti-slip cap 107. Driven by the elastic force of the return spring 108, the locking block 109 is inserted into another C-shaped locking hole 92, which can lock the movable rod 104 and stabilize the connecting column 83 at the same time.

[0054] Among them, as Figure 8 , Figure 10 and Figure 11 shown, a strip-shaped through hole 91 that is slidably engaged with the movable rod 104 is formed on the support square tube 9. Two C-shaped locking holes 92 for fixing the locking block 109 are communicated and provided on one side of the strip-shaped through hole 91. The C-shaped locking holes 92 are used to lock the locking block 109 and limit the anti-slip cap 107. By limiting the anti-slip cap 107, the sliding block 101 is restricted, and further the limiting of the connecting column 83 is completed.

[0055] Among them, as Figure 3 and Figure 4 shown, the support bracket includes two support vertical frames 74 and a connecting cross plate 71 for connecting the support vertical frames 74. Connecting through holes 73 into which the connecting columns 83 are inserted are provided at both the upper and lower ends of the support vertical frames 74. And a plurality of positioning blocks 75 distributed side by side are provided on one side of the connecting cross plate 71. The U-shaped heat exchange coil 72 is supported by the support bracket; by using the connecting through holes 73 that cooperate with the connecting columns 83, the heat exchange assembly 7 can be fixed.

[0056] Among them, as Figure 3 and Figure 7 shown, a plurality of positioning chutes 24 are provided on one side of the C-shaped positioning seat 2 opposite to the convex part. And the positioning blocks 75 are in sliding fit with the positioning chutes 24. The heat exchange assembly 7 is positioned by the sliding connection between the positioning blocks 75 and the positioning chutes 24.

[0057] Among them, as Figure 1 and Figure 2 shown, the heat exchange module further includes a plurality of U-shaped elbows 6. Adjacent U-shaped heat exchange coils 72 are communicated through the U-shaped elbows 6. The two adjacent U-shaped heat exchange coils 72 are connected through the U-shaped elbows 6. For example, among two adjacent U-shaped heat exchange coils 72, the U-shaped elbow 6 is used to connect the water outlet of the U-shaped heat exchange coil 72 in the front with the water inlet of the U-shaped heat exchange coil 72 in the back.

[0058] Among them, as Figure 1 and Figure 2 shown, the heat exchange module further includes two connection frames 5 for connecting with the end cover 3. One connection frame 5 is fixed on one side of the support bracket at the head end, and the other connection frame 5 is fixed on one side of the support bracket at the tail end. The provided connection frames 5 provide support for the fixation of the end cover 3 and facilitate the fixation of the end cover 3.

[0059] During operation, the flue gas inlet is connected to the flue gas discharge port through a pipeline, and the flue gas outlet is connected to the subsequent flue gas treatment equipment through a pipeline. Water is pumped into the U-shaped heat exchange coil 72 by the water inlet pump 4. When the flue gas passes through the U-shaped heat exchange coil 72, heat will be transferred to the U-shaped heat exchange coil 72 to heat the water in the U-shaped heat exchange coil 72. The heated water flows into the heat preservation water tank 1 through the water outlet pipeline and is then transported to the water-using equipment that needs hot water through the water-using pipeline for utilization;

[0060] When it is necessary to clean the U-shaped heat exchange coil 72, first remove the U-shaped elbow 6 (the end cover 3 generally does not affect the cleaning and can be optionally not removed), then pull the anti-slip cap 107 outwards to make the locking block 109 disengage from the current C-shaped locking hole 92, squeeze the return spring 108 through the limiting plate 103, and then move the anti-slip cap 107 to make the movable rod 104 move along the strip-shaped through hole 91. The movable rod 104 drives the sliding block 101 with the help of the limiting plate 103, and further makes the transmission rod 86 drive the T-shaped transmission plate 81 to move. The moving T-shaped transmission plate 81 drives the connecting column 83. Until the movable rod 104 can no longer move, the connecting column 83 will completely disengage from the connecting through hole 73. At this time, release the force pulling the anti-slip cap 107. Driven by the elastic force of the return spring 108, the locking block 109 is inserted into another C-shaped locking hole 92, which can lock the movable rod 104 and stabilize the connecting column 83 at the same time, so as to facilitate the subsequent operation of removing the heat exchange component 7, and then the U-shaped heat exchange coil 72 can be cleaned.

[0061] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A highly efficient integrated flue gas waste heat recovery system, characterized in that: Comprising: A heat preservation water tank (1) for storing hot water, the water outlet of the heat preservation water tank (1) is connected to a water-using device through a water-using pipeline; A heat exchange module, which consists of two end covers (3), a number of heat exchange components (7) arranged side by side, and a number of quick-release structures for splicing two adjacent heat exchange components (7). The heat exchange component (7) includes a support bracket and a U-shaped heat exchange coil (72) penetrating through the support bracket. The water inlet of the U-shaped heat exchange coil (72) at the first end is connected to a water inlet pump (4) through an inlet pipeline, and the water outlet of the U-shaped heat exchange coil (72) at the last end is connected to the water inlet of the heat preservation water tank (1) through an outlet pipeline; The quick-release structure includes a U-shaped positioning seat (2), a support square tube (9) for connecting two U-shaped positioning seats (2), and a limiting component (10). An installation cavity (22) is opened on the protruding part of the U-shaped positioning seat (2), a quick-release component (8) is arranged in the installation cavity (22), and a sealing plate (21) is arranged on one side of the installation cavity (22).

2. The highly efficient integrated flue gas waste heat recovery system according to claim 1, characterized in that: The quick-release component (8) includes a T-shaped transmission plate (81) and a positioning rod (82) fixed on the sealing plate (21). Two symmetrically distributed connecting columns (83) are arranged on one side of the T-shaped transmission plate (81). A through hole that slidably cooperates with the positioning rod (82) is also opened on the T-shaped transmission plate (81). The through hole is located between the two connecting columns (83). A transmission rod (86) is arranged on one side of the through hole. The transmission rod (86) is fixed on the T-shaped transmission plate (81), and a buffer spring (85) is also sleeved outside the transmission rod (86); A pressing spring (84) is sleeved outside the positioning rod (82), and the pressing spring (84) is located between the T-shaped transmission plate (81) and the sealing plate (21).

3. The highly efficient integrated flue gas waste heat recovery system according to claim 2, characterized in that: Two sliding through holes (25) that slidably cooperate with the connecting columns (83) are communicated and arranged on one side of the installation cavity (22). A through hole (23) that is communicated with the installation cavity (22) and can allow the transmission rod (86) to pass through is arranged on one side of the two sliding through holes (25).

4. The highly efficient integrated flue gas waste heat recovery system according to claim 1, characterized in that: The limiting component (10) includes a movable rod (104), a sliding block (101) connected to the transmission rod (86) and capable of sliding in the support square tube (9), an anti-slip cap (107) located outside the support square tube (9), and a fastening bolt (106) for connecting the movable rod (104) and the anti-slip cap (107). A receiving hole (102) is opened on the sliding block (101). A limiting plate (103) that slidably cooperates with the receiving hole (102) is arranged at one end of the movable rod (104), and a threaded blind hole (105) that is screwed with the fastening bolt (106) is opened at the other end. A return spring (108) clamped between the inner wall of the support square tube (9) and the limiting plate (103) is also sleeved outside the movable rod (104), and a locking block (109) is fixed on one side of the anti-slip cap (107).

5. The highly efficient integrated flue gas waste heat recovery system according to claim 4, characterized in that: A strip-shaped through hole (91) slidably engaged with the movable rod (104) is formed in the support square pipe (9), and two C-shaped locking holes (92) for fixing the locking block (109) are communicated with one side of the strip-shaped through hole (91).

6. The highly efficient integrated flue gas waste heat recovery system according to claim 2, characterized in that: The support bracket includes two support vertical frames (74) and a connecting cross plate (71) for connecting the support vertical frames (74). Connecting through holes (73) inserted with the connecting columns (83) are formed at both the upper and lower ends of the support vertical frames (74), and a plurality of positioning blocks (75) distributed side by side are arranged on one side of the connecting cross plate (71).

7. The highly efficient integrated flue gas waste heat recovery system according to claim 6, characterized in that: A plurality of positioning sliding grooves (24) are formed on one side of the U-shaped positioning seat (2) opposite to the convex portion, and the positioning blocks (75) are slidably engaged with the positioning sliding grooves (24).

8. The highly efficient integrated flue gas waste heat recovery system according to claim 1, characterized in that: The heat exchange module further includes a plurality of U-shaped bent pipes (6), and adjacent U-shaped heat exchange coils (72) are communicated through the U-shaped bent pipes (6).

9. The highly efficient integrated flue gas waste heat recovery system according to claim 1, characterized in that: The heat exchange module further includes two connecting frame bodies (5) for connecting with the end covers (3). One connecting frame body (5) is fixed to one side of the support bracket at the head end, and the other connecting frame body (5) is fixed to one side of the support bracket at the tail end.

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