Flue gas waste heat recovery heat exchange device and using method

Abstract

The flue gas waste heat recovery and heat exchange device comprises a cylinder, one side of the cylinder is provided with an overhaul window, the edge of the overhaul window is provided with a first protection frame, the first protection frame is embedded into the overhaul window, the outer surface of the first protection frame is provided with a first sliding groove, and the first protection frame is matched with a second protection frame; a second sliding groove is formed in the inner surface of the second protection frame, a plurality of first fixing rods are installed between the first protection frame and the second protection frame, an installation plate is installed between every two adjacent first fixing rods, and one side of each installation plate is connected with a heat exchange assembly; a traditional integral heat exchange assembly is replaced by the independent heat exchange assembly, when the heat exchange assembly is damaged, the heat exchange assembly does not need to be integrally dismantled like a traditional heat exchanger, only the damaged heat exchange assembly needs to be removed for repair or replacement, the overall working efficiency is improved, the maintenance cost is reduced, and the maintenance time is shortened.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchangers, and in particular to a flue gas waste heat recovery heat exchange device and a use method thereof. Background Art

[0002] Heat exchangers are devices that transfer part of the heat of hot fluid to cold fluid, also known as heat exchangers. Heat exchangers play an important role in many industrial productions. The recovery and utilization of waste heat resources is also a key topic of energy conservation. As a large energy consumer, power generation companies have a large amount of waste heat that cannot be effectively recovered and utilized, and is wasted. Among them, flue gas heat loss is the largest of all heat losses, generally between 5% and 8%, accounting for 80% or more of the total heat loss of the boiler. If a heat exchanger is installed in the flue gas exhaust pipe, the heat exchanger will be in contact with the flue gas with a higher temperature, and the energy in the flue gas will be transferred to the heat exchange medium inside the heat exchange device, so as to recover the waste heat of the flue gas and improve the energy utilization rate, thereby reducing energy consumption and achieving energy conservation and emission reduction.

[0003] When inspecting and cleaning the tubes and baffles of a traditional heat exchanger, the four sets of nuts corresponding to the mounting plate are disassembled, and the mounting plate is removed from the outside of the four sets of bolts, so that all the tubes and baffles are moved out of the cylinder for inspection and cleaning. After the inspection and cleaning, each set of mounting plates is installed on the outside of the four sets of bolts, and then the mounting plates are fixed to the outside of the cylinder by multiple sets of nuts. The disassembly and assembly are cumbersome, and when one set of tubes fails, the entire set of heat exchangers needs to be taken out for repair, affecting the overall work efficiency. When some power generation companies upgrade the flue gas duct, they need to upgrade the heat exchanger. Since the heat exchanger is an integral part, it can often only be replaced as a whole, and the upgrade increases the cost. Summary of the invention

[0004] In order to solve the problem that traditional heat exchangers are complicated to maintain, need to be disassembled as a whole, and need to be completely replaced for subsequent upgrading, the present invention proposes a flue gas waste heat recovery heat exchange device and a use method.

[0005] A flue gas waste heat recovery heat exchange device comprises a cylinder, an inlet is provided at the front end of the cylinder, an outlet is provided at the rear end of the cylinder, an inspection window is provided at one side of the cylinder to facilitate subsequent inspection, a first protective frame is installed at the edge of the inspection window, the first protective frame is embedded in the inspection window, a first slide groove is provided on the outer surface of the first protective frame, the first protective frame is matched with a second protective frame, a second slide groove is provided on the inner surface of the second protective frame, a first fixing rod is installed between the first and second protective frames, the first fixing rods include a plurality of first fixing rods, a mounting plate is installed between adjacent first fixing rods, a heat exchange component is connected to one side of the mounting plate, The other side of the mounting plate is connected to supporting parts of the heat exchange assembly; T-shaped blocks are installed on the top and bottom of the first fixing rod, and the T-shaped blocks move along the first slide groove and the second slide groove, and a third groove is provided on the upper surface of the T-shaped block located at the top of the first fixing rod; the traditional integrated heat exchange assembly is replaced with a separate heat exchange assembly. When the heat exchange assembly is damaged, there is no need to dismantle the entire heat exchanger like a traditional heat exchanger. Only the damaged heat exchange assembly needs to be removed for repair or replacement, which improves the overall work efficiency and reduces the maintenance cost and maintenance time. Furthermore, when an upgrade is required later, only the heat exchange assembly and the sealing plate need to be replaced, without replacing all of them, which further reduces the transformation cost.

[0006] Furthermore, it also includes a fixing component, which is located above the first fixing rod inside the cylinder, and the fixing component includes a push rod and a second groove, the bottom of the push rod is connected to the rotating shaft, the surface of the push rod is provided with a fixing ring, and the fixing ring includes a plurality of them, and a spring is installed between adjacent fixing rings, the surface of the push rod is provided with a sliding rod, the sliding rod is matched with an L-shaped groove, and the L-shaped groove is located on the inner surface of the second groove, the bottom of the rotating shaft is fixedly connected to a second mounting plate, the bottom of the second mounting plate is provided with a fourth sliding groove, the fourth sliding groove is matched with a fixing block, the fixing block moves along the fourth sliding groove, and the fixing block screw is movably connected to the bottom of the fourth sliding groove; the fixing component is used to further fix the separate heat exchange component, and at the same time, the cooperation of the spring, the sliding rod and the L-shaped groove enables the staff to easily fix and loosen the heat exchange component, thereby improving work efficiency;

[0007] Furthermore, screw grooves are provided on both side surfaces of the first protective frame and the second protective frame, the first protective frame and the inner surface of the cylinder are welded and connected, the first protective frame and the second protective frame are bolted and fastened, first grooves are provided at the four corners of the first protective frame and the second protective frame, and the first grooves are matched with positioning rods; the first protective frame is welded to the inner surface of the cylinder, so that the protective frame as a whole can be embedded in the cylinder, which is convenient for subsequent sealing treatment, and the positioning rod is used in combination with the first groove to facilitate installation, thereby further improving work efficiency.

[0008] Furthermore, the type of heat exchange component is selected according to specific circumstances. The present invention selects a shell and tube heat exchanger, which includes multiple heat exchange components, and the multiple heat exchange components are evenly arranged inside the cylinder along the direction of the first protective frame. The heat exchange component is a shell and tube, and an inlet pipe and an outlet pipe are installed on one side of the cylinder. The inlet pipe is movably connected to the water inlet end of the shell and tube, and the outlet pipe is movably connected to the water outlet of the shell and tube. The shell and tube heat exchanger has a simple structure, reliable performance, and is easy to maintain, further reducing the cost of maintenance and replacement.

[0009] Furthermore, the array of tubes is installed on one side of the mounting plate, the array of tubes extends into the interior of the cylinder, a through hole is opened on the surface of the mounting plate, the through hole is matched with the water inlet end and the water outlet end of the array of tubes, a sealing ring is arranged at the connection between the mounting plate and the array of tubes, and a sealing rubber strip is arranged between adjacent first fixing rods; multiple sealing rings are arranged at the connection to further ensure the sealing, prevent smoke from overflowing, and enhance the sealing performance.

[0010] Furthermore, screw grooves are provided around the inspection window, and the inspection window is equipped with a sealing plate. The inspection window and the sealing plate are bolted and fastened. A through hole is provided on the surface of the sealing plate according to the supporting parts of the heat exchange component. The through hole is provided with a sealing ring, and sealing rubber strips are provided around the sealing plate; the sealing plate is tightly fixed to the inspection window, and sealing strips are provided around to further prevent smoke from overflowing.

[0011] Furthermore, an arc-shaped air guide plate is installed inside the cylinder, and the arc-shaped air guide plate is opposite to one side of the inspection window. A flow channel is arranged between the arc-shaped air guide plate and the tube array to guide the flow of smoke inside. A part of the smoke directly impacts the heat exchange component and flows in the gaps between the heat exchange components. The other part passes through the flow channel without the obstruction of the heat exchange component and has a faster flow rate. The pressure is relatively smaller on the other side. Under the action of pressure, the smoke on the other side moves closer to the flow channel, further preventing the smoke from overflowing and improving the sealing performance.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] The traditional integrated heat exchange components are dispersed into separate heat exchange components, which are flexibly matched by utilizing the cooperation of the slide groove on the surface of the protective frame and the mounting plate. They can be replaced according to the specific needs of the user. When a separate heat exchange component fails, there is no need to take out the heat exchange component for repair. Only the damaged heat exchange component needs to be replaced and repaired, which reduces the maintenance cost and improves work efficiency. Furthermore, when the heat exchange component needs to be replaced with other types of heat exchange components, it is only necessary to replace the heat exchange component on the mounting plate and the corresponding sealing plate to complete the conversion, which greatly shortens the transformation time and improves work efficiency.

[0014] Furthermore, the frame and the heat exchange component are embedded in the inspection window and cooperate with the sealing plate to form a lap structure, which is matched with the sealing ring and the sealing rubber strip to effectively prevent smoke from overflowing. Furthermore, an arc-shaped air guide plate and a flow channel are arranged inside the cylinder to guide a small part of the smoke to flow along the flow channel, thereby reducing the pressure near the flow channel and moving the smoke closer to the flow channel to prevent overflow, thereby further enhancing the sealing.

[0015] A method for using a flue gas waste heat recovery and heat exchange device comprises the following steps:

[0016] S1. Select heat exchange components: Select the appropriate number of heat exchange components and supporting components according to user needs. The present invention uses a common shell and tube heat exchanger, including shell and tube, water inlet pipe, and water outlet pipe;

[0017] S2. Assemble the individual heat exchange components: install the tubes on the mounting plate, connect the water outlet and water inlet of the tubes to the mounting plate through the through holes on the mounting plate, install a sealing ring at the connection, screw the first fixing rods on both sides of the mounting plate, and repeat the above steps until all the heat exchange components are assembled;

[0018] S3, installing the fixing components: according to the number of heat exchange components, a corresponding number of fixing blocks are installed in the fourth slide groove at the bottom of the second fixing rod in a ratio of 1:2, and the fixing blocks can move along the fourth slide groove;

[0019] S4. Install the first protection frame and heat exchange components: weld the first protection frame to the inner surface of the cylinder at the inspection window on one side of the cylinder. After the welding is firm, install a fixing component inside the cylinder above the first protection frame, evenly distribute the fixing blocks at the bottom of the fixing component according to the number of heat exchange components, and install positioning rods in the second grooves at the four corners of the first protection frame and set buffer blocks on both sides. After the installation is completed, place the individual heat exchange components in sequence along the first slide groove opened on the surface of the first protection frame, and align the third groove on the top of the T-shaped block with the fixing block for installation;

[0020] S5. Install the second protective frame: align the second grooves at the four corners of the second protective frame with the positioning rods, align the second slide grooves with the T-blocks for installation, use bolts to connect and tighten the first protective frame and the second protective frame, and fix the heat exchange assembly between the first protective frame and the second protective frame.

[0021] S6. Install the sealing plate: open through holes on the surface of the sealing plate according to the corresponding positions of the water inlet and outlet of the heat exchange component, set sealing rings at the through holes, connect the sealing plate to the screw grooves around the inspection window with bolts, and tighten the connection;

[0022] S7. Install the water inlet pipe and the water outlet pipe: Connect the water inlet end and the water outlet end of the heat exchange component to the water inlet pipe and the water outlet pipe respectively, and tighten the connection to complete the installation;

[0023] S8. Tightening: Press the push rod down and rotate it. The push rod moves downward to compress the spring and drive the slide bar to move downward along the L-shaped groove. The slide bar moves to the bottom of the L-shaped groove. Rotate the push rod to drive the slide bar to rotate so that the slide bar is fixed in the L-shaped groove. At this time, the spring is in a compressed state. The push rod moves downward and drives the second fixing rod at the bottom to move downward, driving the fixing block to move downward into the third groove at the top of the T-shaped block, fixing the heat exchange assembly at the current position to complete the installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 It is a schematic diagram of the structure of the flue gas waste heat recovery and heat exchange device A;

[0026] Figure 2 It is a structural schematic diagram B of a flue gas waste heat recovery and heat exchange device;

[0027] Figure 3 It is an enlarged schematic diagram of part A;

[0028] Figure 4 It is a schematic diagram of the structure of the flue gas waste heat recovery and heat exchange device C;

[0029] Figure 5 It is a schematic diagram of the fixed component structure A;

[0030] Figure 6 It is a schematic diagram of the fixed component structure B;

[0031] Figure 7 It is a cross-sectional schematic diagram of a flue gas waste heat recovery and heat exchange device.

[0032] In the figure: 1. cylinder; 2. push rod; 3. water inlet pipe; 4. tube array; 5. heat exchange component; 6. water outlet pipe; 7. first protective frame; 8. bolt; 9. screw groove; 10. second protective frame; 11. first groove; 12. positioning rod; 13. second groove; 14. first slide groove; 15. fixing block; 16. third groove; 17. T-block; 18. arc-shaped air guide plate; 19. second slide groove; 20. first fixing rod; 21. third slide groove; 22. fixing ring; 23. spring; 24. slide rod; 25. L-shaped groove; 26. rotating shaft; 27. second fixing rod; 28. mounting plate; 29. ​​sealing plate. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0034] The application principle of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0035] Example 1

[0036] like Figure 1-7 Shown

[0037] A flue gas waste heat recovery heat exchange device comprises a cylinder 1, wherein the front end of the cylinder 1 is provided with an inlet, the rear end of the cylinder is provided with an outlet, one side of the cylinder 1 is provided with an inspection window, a first protective frame 7 is installed on the edge of the inspection window, the first protective frame 7 is embedded in the inspection window, a first slide groove 14 is provided on the outer surface of the first protective frame 7, the first protective frame 7 is matched with a second protective frame 10, a second slide groove 19 is provided on the inner surface of the second protective frame 10, a first fixing rod 20 is installed between the first protective frame 7 and the second protective frame 10, the first fixing rod 20 includes a plurality of first fixing rods 20, a mounting plate 28 is installed between adjacent first fixing rods 20, a heat exchange component 5 is connected to one side of the mounting plate 28, and a heat exchange component matching component is connected to the other side of the mounting plate 28; T-shaped blocks 17 are installed on the top and bottom of the first fixing rod 20, the T-shaped block 17 moves along the first slide groove 14 and the second slide groove 19, and a third groove 16 is provided on the upper surface of the T-shaped block 17 located at the top of the first fixing rod 20.

[0038] It also includes a fixing component, which is located above the first fixing rod 20 inside the cylinder 1, and the fixing component includes a push rod 2 and a second groove 13. The bottom of the push rod 2 is connected with a rotating shaft 26, and a fixing ring 22 is arranged on the surface of the push rod 2. The fixing ring 22 includes multiple fixing rings, and a spring 23 is installed between adjacent fixing rings 22. A sliding rod 24 is arranged on the surface of the push rod 2, and the sliding rod 24 is matched with an L-shaped groove 25. The L-shaped groove 25 is located on the inner surface of the second groove 13. A second mounting plate 27 is fixedly connected to the bottom of the rotating shaft 26, and a fourth sliding groove is arranged at the bottom of the second mounting plate 27. The fourth sliding groove is matched with a fixing block 15, and the fixing block 15 moves along the fourth sliding groove, and the fixing block 15 is movably connected to the bottom of the fourth sliding groove with a screw.

[0039] Screw grooves 9 are provided on both side surfaces of the first protective frame 7 and the second protective frame 10 , the first protective frame 7 and the inner surface of the cylinder 1 are welded and connected, and the first protective frame 7 and the second protective frame 10 are fastened with bolts 8 .

[0040] First grooves 11 are formed at four corners of the first protection frame 7 and the second protection frame 10 , and positioning rods 12 are matched with the first grooves 11 .

[0041] The heat exchange components 5 include multiple ones, and the specific number and type of heat exchanger are determined according to user needs. The multiple heat exchange components 5 are evenly arranged inside the cylinder 1 along the direction of the first protective frame 7. The heat exchange components 5 are tube arrays 4. An inlet pipe 3 and an outlet pipe 6 are installed on one side of the cylinder 1. The inlet pipe 3 is movably connected to the water inlet end of the tube array 4, and the outlet pipe 6 is movably connected to the water outlet end of the tube array 4.

[0042] The array of tubes 4 is installed on one side of the mounting plate 28, and the array of tubes 4 extends into the interior of the cylinder 1. A through hole is opened on the surface of the mounting plate 28, and the through hole is matched with the water inlet end and the water outlet end of the array of tubes 4. A sealing ring is provided at the connection between the mounting plate 28 and the array of tubes 4, and a sealing rubber strip is provided between adjacent first fixing rods 20.

[0043] The inspection window is provided with screw grooves 9 around it, and the inspection window is matched with a sealing plate 29. The inspection window and the sealing plate 29 are fastened with bolts 8. A through hole is provided on the surface of the sealing plate 29 according to the matching parts of the heat exchange component 5. The through hole is provided with a sealing ring, and sealing rubber strips are provided around the sealing plate 29.

[0044] An arc-shaped air guide plate 18 is installed inside the cylinder 1 , and the arc-shaped air guide plate 18 is directly opposite to one side of the inspection window. A flow channel is provided between the arc-shaped air guide plate 18 and the array of tubes 4 .

[0045] Example 2

[0046] A method for using a flue gas waste heat recovery and heat exchange device, characterized in that it comprises the following steps:

[0047] S1. Select heat exchange components: select the appropriate number of heat exchange components 5 and supporting parts according to user needs;

[0048] S2. Assemble separate heat exchange components: select a tube-and-tube 4 heat exchanger, install the tube-and-tube 4 on the mounting plate 28, install a sealing ring at the connection, screw the first fixing rod 20 on both sides of the mounting plate 28, and repeat the above steps until all heat exchange components 5 are assembled;

[0049] S3, installing the fixing components: according to the number of heat exchange components, a corresponding number of fixing blocks 15 are installed in the fourth chute at the bottom of the second fixing rod 27 in a ratio of 1:2;

[0050] S4, install the first protection frame 7 and the heat exchange component 5: weld the first protection frame 7 to the inner surface of the cylinder 1 at the inspection window on one side of the cylinder 1. After the welding is stable, install the fixing component above the first protection frame 7 inside the cylinder 1, and install the positioning rods 12 in the second grooves 13 at the four corners of the first protection frame 7 and set buffer blocks on both sides. After the installation is completed, place the separate heat exchange component 5 in sequence along the first slide groove 14 opened on the surface of the first protection frame 7, and align the third groove 16 at the top of the T-shaped block 17 with the fixing block 15;

[0051] S5. Install the second protection frame 10: align the second grooves 13 at the four corners of the second protection frame 10 with the positioning rods 12, align the second slide grooves 13 with the T-shaped blocks 17 for installation, and use bolts 8 to connect and fasten the first protection frame 7 and the second protection frame 10;

[0052] S6, tightening: press the push rod 2 to fix the heat exchange component at the current position to complete the installation;

[0053] S7. Install the water inlet pipe and the water outlet pipe: Connect the water inlet end and the water outlet end of the heat exchange component to the water inlet pipe and the water outlet pipe respectively, and tighten the connection to complete the installation;

[0054] S8. Install the sealing plate 29: open through holes on the surface of the sealing plate 29 at the corresponding positions of the water inlet and the water outlet of the heat exchange component 5, set sealing rings at the through holes, connect the sealing plate 29 to the screw grooves 9 around the inspection window with bolts 8, and tighten the connection.

[0055] Example 3

[0056] When the heat exchange device fails, the water inlet pipe and the water outlet pipe on the sealing plate 29 are separated from the water inlet end and the water outlet end of the tube array. After separation, the bolts 8 on the sealing plate 29 are removed to expose the inspection window, and the push rod 2 is rotated. The slide rod 24 moves along the L-shaped groove 25 under the action of elastic force to release the fastening of the heat exchange component. Then the bolts 8 on the second protective frame 10 are removed, and the damaged heat exchange component 5 is pulled out for repair or replacement. When it is not clear which heat exchange component 5 has a problem, the heat exchange components 5 can be pulled out separately for inspection and installed back to their original positions after inspection until the problematic component is found for repair or replacement.

[0057] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

Claims

1. A flue gas waste heat recovery and heat exchange device, characterized in that: The invention comprises a cylinder (1), wherein the front end of the cylinder (1) is provided with an inlet, the rear end of the cylinder is provided with an outlet, one side of the cylinder (1) is provided with an inspection window, the edge of the inspection window is provided with a first protective frame (7), the first protective frame (7) is embedded in the inspection window, the outer surface of the first protective frame (7) is provided with a first slide groove (14), the first protective frame (7) is matched with a second protective frame (10), the inner surface of the second protective frame (10) is provided with a second slide groove (19), a first fixing rod (20) is installed between the first protective frame (7) and the second protective frame (10), the first fixing rod (20) comprises a plurality of first fixing rods (20), a mounting plate (28) is installed between adjacent first fixing rods (20), one side of the mounting plate (28) is connected with a heat exchange component (5), and the other side of the mounting plate (28) is connected with a matching component of the heat exchange component.

2. The flue gas waste heat recovery and heat exchange device according to claim 1, characterized in that: T-shaped blocks (17) are installed at the top and bottom of the first fixing rod (20), and the T-shaped blocks (17) move along the first sliding groove (14) and the second sliding groove (19). A third groove (16) is formed on the upper surface of the T-shaped block (17) located at the top of the first fixing rod (20).

3. The flue gas waste heat recovery and heat exchange device according to claim 1, characterized in that: The invention also comprises a fixing component, which is located above the first fixing rod (20) inside the cylinder (1), and the fixing component comprises a push rod (2) and a second groove (13). The bottom of the push rod (2) is connected with a rotating shaft (26). The surface of the push rod (2) is provided with a fixing ring (22). The fixing ring (22) comprises a plurality of fixing rings, and a spring (23) is installed between adjacent fixing rings (22). The surface of the push rod (2) is provided with a sliding rod (24), and the sliding rod (24) is matched with an L-shaped groove (25). The L-shaped groove (25) is located on the inner surface of the second groove (13). The bottom of the rotating shaft (26) is fixedly connected with a second mounting plate (27), and the bottom of the second mounting plate (27) is provided with a fourth sliding groove. The fourth sliding groove is matched with a fixing block (15), and the fixing block (15) moves along the fourth sliding groove. The fixing block (15) is movably connected to the bottom of the fourth sliding groove by a screw.

4. The flue gas waste heat recovery and heat exchange device according to claim 1, characterized in that: Screw grooves (9) are provided on both side surfaces of the first protective frame (7) and the second protective frame (10); the first protective frame (7) and the inner surface of the cylinder (1) are welded together; the first protective frame (7) and the second protective frame (10) are fastened together by bolts (8).

5. The flue gas waste heat recovery and heat exchange device according to claim 4, characterized in that: The first protection frame (7) and the second protection frame (10) are provided with first grooves (11) at four corners, and the first grooves (11) are matched with positioning rods (12).

6. The flue gas waste heat recovery and heat exchange device according to claim 1, characterized in that: The heat exchange assembly (5) comprises a plurality of heat exchange assemblies (5), and the plurality of heat exchange assemblies (5) are evenly arranged inside the cylinder (1) along the direction of the first protective frame (7); the heat exchange assembly (5) is a tube array (4); a water inlet pipe (3) and a water outlet pipe (6) are installed on one side of the cylinder (1); the water inlet pipe (3) is movably connected to the water inlet end of the tube array (4), and the water outlet pipe (6) is movably connected to the water outlet end of the tube array (4).

7. The flue gas waste heat recovery and heat exchange device according to claim 6, characterized in that: The array of tubes (4) is mounted on one side of a mounting plate (28), the array of tubes (4) extends into the interior of the cylinder (1), a through hole is provided on the surface of the mounting plate (28), the through hole is matched with a water inlet end of the array of tubes (4) and a water outlet end of the array of tubes (4), a sealing ring is provided at the connection between the mounting plate (28) and the array of tubes (4), and a sealing rubber strip is provided between adjacent first fixing rods (20).

8. The flue gas waste heat recovery and heat exchange device according to claim 1, characterized in that: The inspection window is provided with screw grooves (9) around it, and the inspection window is matched with a sealing plate (29). The inspection window and the sealing plate (29) are fastened by bolts (8). A through hole is provided on the surface of the sealing plate (29) according to the matching parts of the heat exchange component (5), and the through hole is provided with a sealing ring. The sealing plate (29) is provided with sealing rubber strips around it.

9. The flue gas waste heat recovery and heat exchange device according to claim 1, characterized in that: An arc-shaped air guide plate (18) is installed inside the cylinder (1), the arc-shaped air guide plate (18) is directly opposite to one side of the inspection window, and a flow channel is provided between the arc-shaped air guide plate (18) and the tube array (4).

10. A method for using a flue gas waste heat recovery and heat exchange device, characterized in that: The following steps are involved: S1. Select heat exchange components: select the appropriate quantity and supporting components of heat exchange components (5) according to user needs; S2. Assembling a separate heat exchange component: Select a tube (4) radiator, install the tube (4) on the mounting plate (28), install a sealing ring at the connection, connect the first fixing rod (20) on both sides of the mounting plate (28) with screws, and repeat the above steps until all the heat exchange components (5) are assembled; S3, installing the fixing components: according to the number of heat exchange components, a corresponding number of fixing blocks (15) are installed in the fourth sliding groove at the bottom of the second fixing rod (27) in a ratio of 1:2; S4. Install the first protective frame (7) and the heat exchange assembly (5): weld the first protective frame (7) to the inner surface of the cylinder (1) at the inspection window on one side of the cylinder (1). After the welding is firm, install a fixing component inside the cylinder (1) above the first protective frame (7). At the same time, install positioning rods (12) in the second grooves (13) at the four corners of the first protective frame (7) and set buffer blocks on both sides. After the installation is completed, place the individual heat exchange assemblies (5) in sequence along the first slide grooves (14) opened on the surface of the first protective frame (7), and align the third groove (16) on the top of the T-shaped block (17) with the fixing block (15); S5. Install the second protection frame (10): align the second grooves (13) provided at the four corners of the second protection frame (10) with the positioning rod (12), align the second slide groove (13) with the T-shaped block (17) for installation, and use bolts (8) to connect and tighten the first protection frame (7) and the second protection frame (10); S6. Install the sealing plate (29): open through holes on the surface of the sealing plate (29) at positions corresponding to the water inlet and water outlet of the heat exchange component (5), set sealing rings at the through holes, connect the sealing plate (29) to the screw grooves (9) around the inspection window with bolts (8), and tighten the connection; S7. Install the water inlet pipe and the water outlet pipe: Connect the water inlet end and the water outlet end of the heat exchange component to the water inlet pipe and the water outlet pipe respectively, and tighten the connection to complete the installation; S8, tightening: Press the push rod (2) down to fix the heat exchange assembly in the current position to complete the installation.

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