Heat exchange device for industrial boiler

Abstract

The application relates to the technical field of industrial boilers, in particular to a heat exchange device of an industrial boiler, which comprises an industrial boiler membrane wall body, a plurality of second return springs are fixedly connected to the inner wall of the industrial boiler membrane wall body, one end of the second return spring is fixedly connected with a moving block, and a plurality of uniformly-distributed through grooves are formed in the outer wall of the moving block. When the second guide rod is drawn along the second inclined surface to the third inclined surface, the inclined angle of the third inclined surface promotes the second guide rod to return to the inclined state with the moving block, at this time, the fourth guide rod and the third ball are in the inclined state and are forced to move, the surface of the second heat exchange pipe group is knocked, so that different knocking positions can be changed in the process of device operation, and the knocking effect on the heat exchange pipe group is more uniform.

Description

Technical Field

[0001] This invention relates to the field of industrial boiler technology, specifically to a heat exchange device for an industrial boiler. Background Technology

[0002] A boiler heat exchanger is a device that utilizes the waste gas produced by a boiler after burning coal or other energy sources. Typically, the waste gas generated by the high-temperature combustion of the boiler enters the membrane wall of the industrial boiler. The high heat of the waste gas is transferred through heat conduction in the heat exchange tube assembly, heating the water in the heat exchange tubes. The high-pressure steam generated by the high temperature and pressure in the heat exchange tubes can then be reused.

[0003] However, in existing heat exchange devices on the market, after high-temperature exhaust gas enters the membrane wall of the industrial boiler, the high-temperature exhaust gas contains a large number of impurities. These impurities will remain and adhere to the surface of the heat exchange tube assembly when passing through the membrane wall of the industrial boiler for a long time. Long-term adhesion and accumulation will lead to a decrease in the heat conduction effect of the outer wall of the heat exchange tube, which will easily lead to a poor heat exchange effect. Therefore, a boiler heat exchange device that can solve this problem is needed. Summary of the Invention

[0004] This invention provides a heat exchange device for an industrial boiler, which facilitates the uniform cleaning of impurities from the outer wall of the heat exchange tube assembly. This solves the problem mentioned in the background section where impurities, after long-term passage through the membrane wall of the industrial boiler, remain and adhere to the surface of the heat exchange tube assembly. Long-term accumulation of these impurities leads to a decrease in the heat conduction efficiency of the outer wall of the heat exchange tubes, resulting in poor heat exchange performance. To achieve the above objective, this invention provides the following technical solution: A heat exchange device for an industrial boiler includes a membrane wall assembly. Multiple second return springs are fixedly connected to the inner wall of the membrane wall assembly. One end of each second return spring is fixedly connected to a moving block. Multiple evenly distributed through slots are formed on the outer wall of the moving block. A fourth guide rod is slidably connected to the inner wall of each through slot. A third ball and a fourth ball are rotatably mounted at both ends of the fourth guide rod. A second fixing plate is fixedly connected to the outer wall of the fourth guide rod. One end of the second fixing plate is fixedly connected to a third return spring, which is sleeved on the fourth guide rod. The other end of the third return spring is fixedly connected to the outer wall of the moving block.

[0005] As an optional solution for the heat exchange device of an industrial boiler according to the present invention, a steam converter is fixedly installed on the outer wall of the membrane wall body of the industrial boiler, a second conveying pipe is fixedly connected to the output end of the steam converter, a fixed frame is fixedly connected to one end of the second conveying pipe, and the second conveying pipe and the fixed frame are interconnected.

[0006] A fixing block is fixedly connected inside the fixing frame, a turbine fan is rotatably mounted on the outer wall of the fixing block, and a first guide rod is fixedly connected to the outer wall of the turbine fan.

[0007] As an optional embodiment of the heat exchange device for an industrial boiler according to the present invention, wherein: one end of the first guide rod is rotatably connected to an installation frame, the installation frame is fixedly connected to the outer wall of the membrane wall body of the industrial boiler, and an actuating wheel is fixedly connected to the outer wall of the first guide rod, the end of the actuating wheel being provided with an arc angle.

[0008] As an optional solution for the heat exchange device of an industrial boiler according to the present invention, wherein: a second guide rod is slidably connected to the membrane wall body of the industrial boiler, and a first ball is rotatably installed at one end of the second guide rod;

[0009] The outer wall of the second guide rod is fixedly connected to a first fixing plate, and the outer wall of the first fixing plate is fixedly connected to a first return spring. The first return spring is sleeved on the second guide rod, and the other end of the first return spring is fixedly connected to the outer wall of the membrane wall body of the industrial boiler.

[0010] As an optional embodiment of the heat exchange device for an industrial boiler according to the present invention, wherein: a second ball is rotatably mounted on the other end of the second guide rod, and a plurality of evenly distributed first inclined surfaces, second inclined surfaces and third inclined surfaces are opened on the outer wall of the second guide rod, and the first inclined surfaces, second inclined surfaces and third inclined surfaces are arranged in a continuous manner.

[0011] As an optional embodiment of the heat exchange device for an industrial boiler according to the present invention, a third guide rod is fixedly connected to the outer wall of the moving block.

[0012] As an optional solution for the heat exchange device of an industrial boiler according to the present invention, wherein: both ends of the movable block are fixedly connected with protrusions, and the protrusions are configured as blocks with an arc shape;

[0013] The inner wall of the membrane wall body of the industrial boiler is fixedly connected with two limiting blocks for cooperating with the protrusion to limit the movement of the block.

[0014] As an optional embodiment of the heat exchange device for an industrial boiler according to the present invention, wherein: a first conveying pipe is fixedly connected to the outer wall of the fixed frame, the first conveying pipe is interconnected with the fixed frame, and one end of the first conveying pipe is connected to the input end of the steam converter.

[0015] As an optional embodiment of the heat exchange device for an industrial boiler according to the present invention, the membrane wall body of the industrial boiler is internally equipped with a first heat exchange tube group, a second heat exchange tube group and a third heat exchange tube group, which are interconnected.

[0016] As an optional embodiment of the heat exchange device for an industrial boiler according to the present invention, wherein: one end of the first heat exchange tube group is connected to a steam converter; a high-temperature flue gas inlet pipe is fixedly connected to the outer wall of the industrial boiler membrane wall body; a combustion chamber is provided inside the industrial boiler membrane wall body, and the combustion chamber is connected to the high-temperature flue gas inlet pipe; the other end of the first heat exchange tube group is fixedly connected to a return tube group, and one end of the return tube group is fixedly connected to the steam converter.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] 1. In this invention, the movement of the second guide rod causes the vibration generated by the knocking to dislodge impurities in the exhaust gas adhering to the outer walls of the first, second, and third heat exchanger tube groups, thereby reducing the impact of impurity accumulation on the heat exchange efficiency of the heat exchanger tube groups.

[0019] 2. In this invention, when the second guide rod slides along the second inclined surface into the third inclined surface, the inclined angle of the third inclined surface causes the second guide rod to return to the inclined state with the moving block. At this time, the fourth guide rod and the third rolling ball are in an inclined state and are subjected to force to move, striking the surface of the second heat exchange tube group. This allows for the continuous change of different striking positions during the operation of the device, thereby achieving a more uniform striking effect on the heat exchange tube group.

[0020] 3. In this invention, the flow tube group is designed as a "micro-S" shape and arranged in the membrane wall. Depending on the boiler load, three to four groups of tubes can be arranged. The flue gas flows from bottom to top, and the flue gas temperature is also higher at the bottom. The flue gas in the lower flue gas turning zone of the combustion chamber scours the convection tubes laterally, the middle straight tube is a pure longitudinal scour zone, and the outlet zone is a transverse scour zone. This achieves a good combination of transverse and longitudinal scour. Although the convection tubes are arranged longitudinally, they have the effect of mixed transverse and longitudinal scour. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the overall cross-sectional structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the overall side view structure of the present invention;

[0024] Figure 4 This is a side cross-sectional view of the present invention.

[0025] Figure 5 For the present invention Figure 4 A magnified schematic diagram of the central part of the structure;

[0026] Figure 6 For the present invention Figure 5 Enlarged structural diagram at point B;

[0027] Figure 7 For the present invention Figure 5 Enlarged structural diagram at point A in the middle;

[0028] Figure 8 This is a top view cross-sectional structural diagram of the present invention;

[0029] Figure 9 For the present invention Figure 8 Enlarged structural diagram at point C.

[0030] The components represented by each number in the attached diagram are listed below: 1. Main body of the industrial boiler membrane wall; 2. Combustion chamber; 3. High-temperature flue gas inlet pipe; 4. First heat exchanger tube assembly; 5. Return tube assembly; 6. Steam converter; 7. Second heat exchanger tube assembly; 8. Third heat exchanger tube assembly; 9. First conveying pipe; 10. Second conveying pipe; 11. Fixing frame; 12. Mounting frame; 13. Fixing block; 14. Turbine fan; 15. First guide rod; 16. Actuating wheel; 17. Rounded corner. ; 18. Second guide rod; 19. First ball; 20. First fixing plate; 21. First return spring; 22. Second ball; 23. First inclined plane; 24. Second inclined plane; 25. Third inclined plane; 26. Limiting block; 27. Second return spring; 28. Moving block; 29. ​​Protrusion; 30. Third guide rod; 31. Through groove; 32. Fourth guide rod; 33. Third ball; 34. Fourth ball; 35. Second fixing plate; 36. Third return spring. Detailed Implementation

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

[0032] Example 1 aims to address the problem that impurities, after long-term passage through the membrane wall of an industrial boiler, tend to remain and adhere to the surface of the heat exchange tube assembly. This long-term accumulation of impurities leads to a decrease in the heat transfer efficiency of the outer wall of the heat exchange tubes, resulting in poor heat exchange performance. Please refer to [link to relevant documentation]. Figure 1 - Figure 9A heat exchange device for an industrial boiler includes an industrial boiler membrane wall body 1. Multiple second return springs 27 are fixedly connected to the inner wall of the industrial boiler membrane wall body 1. One end of each second return spring 27 is fixedly connected to a moving block 28. Multiple evenly distributed through grooves 31 are opened on the outer wall of the moving block 28. A fourth guide rod 32 is slidably connected to the inner wall of each through groove 31. A third ball 33 and a fourth ball 34 are rotatably mounted on both ends of the fourth guide rod 32, respectively. A second fixing plate 35 is fixedly connected to the outer wall of the fourth guide rod 32. A third return spring 36 is fixedly connected to one end of the second fixing plate 35 and sleeved on the fourth guide rod 32. The other end of the third return spring 36 is fixedly connected to the outer wall of the moving block 28.

[0033] A steam converter 6 is fixedly installed on the outer wall of the membrane wall body 1 of the industrial boiler. The output end of the steam converter 6 is fixedly connected to a second conveying pipe 10. One end of the second conveying pipe 10 is fixedly connected to a fixed frame 11. The second conveying pipe 10 and the fixed frame 11 are interconnected.

[0034] A fixing block 13 is fixedly connected inside the fixing frame 11. A turbine fan 14 is rotatably mounted on the outer wall of the fixing block 13. A first guide rod 15 is fixedly connected to the outer wall of the turbine fan 14.

[0035] One end of the first guide rod 15 is rotatably connected to the mounting frame 12, which is fixedly connected to the outer wall of the industrial boiler membrane wall body 1. The outer wall of the first guide rod 15 is fixedly connected to the actuating wheel 16, and the end of the actuating wheel 16 is provided with an arc angle 17.

[0036] The membrane wall body 1 of the industrial boiler is internally equipped with a first heat exchange tube group 4, a second heat exchange tube group 7 and a third heat exchange tube group 8, which are interconnected.

[0037] One end of the first heat exchange tube group 4 is connected to the steam converter 6. The outer wall of the industrial boiler membrane wall body 1 is fixedly connected to the high-temperature flue gas inlet pipe 3. The interior of the industrial boiler membrane wall body 1 is provided with a combustion chamber 2, which is connected to the high-temperature flue gas inlet pipe 3. The other end of the first heat exchange tube group 4 is fixedly connected to the return tube group 5, and one end of the return tube group 5 is fixedly connected to the steam converter 6.

[0038] In this embodiment: When using the boiler heat exchange device, when high-temperature exhaust gas is started to be transported into the combustion chamber 2 through the high-temperature flue gas inlet pipe 3, the exhaust gas enters the combustion chamber 2 and conducts heat to the first heat exchange tube group 4, the second heat exchange tube group 7 and the third heat exchange tube group 8 through heat exchange. Since the first heat exchange tube group 4, the second heat exchange tube group 7 and the third heat exchange tube group 8 are interconnected, the water inside them will be boiled at high temperature and the resulting steam will enter the steam converter 6 along the pipe. At this time, the high-temperature and high-pressure steam in the steam converter 6 can be reused through the external pipeline.

[0039] Furthermore, a portion of the high-temperature and high-pressure steam will be transported to the fixed frame 11 through the second conveying pipe 10. After the high-pressure steam enters the fixed frame 11, it will then enter the first conveying pipe 9 through the fixed frame 11 and be transported back to the steam converter 6. During the flow of steam from the fixed frame 11 to the first conveying pipe 9, the high pressure and high velocity of the high-pressure steam will act on the blades of the turbine fan 14, causing the blades to rotate under force. Therefore, as heat exchange proceeds, the turbine fan 14 will always rotate. The rotation of the actuating wheel 16 will cause its outer wall and the arc corner 17 at its end to abut against the first rolling ball 19. As the actuating wheel 16 rotates, the abutting force causes the first rolling ball 19 to move along with the second guide rod 18. The second guide rod 18 moves deeper into the interior of the industrial boiler membrane wall body 1, and moves synchronously with the first fixing plate 20 during the movement. When the first fixing plate 20 moves, it compresses the first return spring 21 to keep it in a taut state, which facilitates subsequent reset.

[0040] As the second guide rod 18 moves, the second ball 22 at the other end of the second guide rod 18 will abut against multiple third balls 33 when moving synchronously. As the second ball 22 abuts against the third ball 33, the third ball 33 will be forced to slide into the through groove 31 with the corresponding fourth guide rod 32 under force. During the sliding process, the fourth guide rod 32 will move synchronously with the second fixing plate 35. During the movement of the second fixing plate 35, the third return spring 36 will be stretched and tightened to facilitate subsequent reset.

[0041] At this moment, the movement of the fourth guide rod 32 occurs instantaneously and synchronously when the third rolling ball 33 and the second rolling ball 22 collide. Therefore, the movement of the fourth guide rod 32 has a certain speed. The fourth guide rod 32, along with the fourth rolling ball 34 at the other end, impacts and strikes the outer wall of the second heat exchange tube group 7. Since there are multiple fourth guide rods 32 evenly arranged on the moving block 28, as the second guide rod 18 continues to move, each fourth guide rod 32 will strike the outer wall of the second heat exchange tube group 7 along with the fourth rolling ball 34. Since the second heat exchange tube group 7 is interconnected with the third heat exchange tube group 8 and the first heat exchange tube group 4, the vibration generated by the impact will cause impurities in the exhaust gas adhering to the outer walls of the first heat exchange tube group 4, the second heat exchange tube group 7, and the third heat exchange tube group 8 to fall off, reducing the impact of impurity accumulation on the heat exchange efficiency of the heat exchange tube group.

[0042] When the actuating wheel 16 rotates to release its contact with the second guide rod 18 and the first ball 19, the first return spring 21 returns to its original position, bringing the first fixing plate 20 and the second guide rod 18 back to their original positions. When the second guide rod 18 moves back to its original position, it brings the second ball 22 back to its original position, releasing its contact with the third ball 33 and the fourth guide rod 32. At this time, the third return spring 36 also returns to its original position, bringing the second fixing plate 35 and the fourth guide rod 32 back to their original positions. This allows the actuating wheel 16 to rotate back to a position where it can contact the second guide rod 18 and the first ball 19, so that the next round of tapping and vibration to remove impurities can continue.

[0043] Example 2 aims to address the problem that simply tapping a single area of ​​the heat exchanger tube assembly fails to create a more even vibration that dislodges accumulated impurities from the outside of the tubes. This example is an improvement upon Example 1. For details, please refer to [link to example]. Figure 1 - Figure 9 A second guide rod 18 is slidably connected to the main body 1 of the industrial boiler membrane wall, and a first ball bearing 19 is rotatably installed at one end of the second guide rod 18.

[0044] The outer wall of the second guide rod 18 is fixedly connected to the first fixing plate 20, and the outer wall of the first fixing plate 20 is fixedly connected to the first return spring 21. The first return spring 21 is sleeved on the second guide rod 18, and the other end of the first return spring 21 is fixedly connected to the outer wall of the industrial boiler membrane wall body 1.

[0045] The other end of the second guide rod 18 is rotatably mounted with a second ball 22. The outer wall of the second guide rod 18 is provided with a plurality of evenly distributed first inclined surfaces 23, second inclined surfaces 24 and third inclined surfaces 25, which are arranged in a continuous manner.

[0046] A third guide rod 30 is fixedly connected to the outer wall of the movable block 28.

[0047] Both ends of the movable block 28 are fixedly connected with protrusions 29, and the protrusions 29 are set as blocks with an arc shape;

[0048] The inner wall of the industrial boiler membrane wall body 1 is fixedly connected with two limiting blocks 26 for cooperating with the protrusion 29 to limit the movement block 28.

[0049] The outer wall of the fixed frame 11 is fixedly connected to the first conveying pipe 9, which is connected to the fixed frame 11. One end of the first conveying pipe 9 is connected to the input end of the steam converter 6.

[0050] In this embodiment: To solve the above problem, during the continuous rotation of the actuating wheel 16, when the actuating wheel 16 abuts against the first ball 19 and the second guide rod 18, when the second guide rod 18 is moved, before the second guide rod 18 and the second ball 22 abut against the fourth guide rod 32 and the third ball 33, the second ball 22 will first abut against the third guide rod 30 on the outer wall of the moving block 28, abutting against the outer wall of the cylindrical third guide rod 30, causing the third guide rod 30 to carry the moving block 28 downward force. Since the third guide rod 30 is fixed at a position slightly to the right of the center of the moving block 28, when it is subjected to downward force, it will also cause the right side of the moving block 28 to be subjected to downward force. At this time, the right side of the moving block 28 will be subjected to downward force to compress the second return spring 27 on the right side, causing the moving block 28 to be in an inclined state. And as the second guide rod 18 moves... As the movement continues, the second guide rod 18 will abut against the third ball 33 and the fourth guide rod 32, which are in an inclined state, causing the third ball 33 and the fourth guide rod 32 to strike the outer wall of the second heat exchange tube assembly 7 at a position different from that in Embodiment 1. Subsequently, as the second guide rod 18 continues to move, the third guide rod 30 will slide along the outer wall of the second guide rod 18 into the third inclined surface 25. At this time, due to the inclination angle of the third inclined surface 25, the second guide rod 18 will gradually be relieved of the force. At this time, the second return spring 27 will reset and the moving block 28 will rebound and reset. Subsequently, when the third guide rod 30 continues to slide from the surface of the third inclined surface 25 into the surface of the second inclined surface 24, the fourth guide rod 32 and the third ball 33, which are in a horizontal state, will be abutted and moved to strike the horizontal position of the second heat exchange tube assembly 7, which is the same as the striking position in Embodiment 1.

[0051] When the second guide rod 18 slides along the surface of the second inclined plane 24 into the surface of the third inclined plane 25, the inclined angle of the third inclined plane 25 causes the second guide rod 18 to return to the inclined state with the moving block 28. At this time, the fourth guide rod 32 and the third rolling ball 33 are in the inclined state and are moved by force, striking the surface of the second heat exchange tube group 7. This allows for a more uniform striking effect on the heat exchange tube group by continuously changing different striking positions during the operation of the device.

[0052] The flow tube assembly is designed in a "micro-S" shape and arranged in the membrane wall. Depending on the boiler load, three to four sets of tubes can be arranged. The flue gas flows from bottom to top, and the flue gas temperature is also higher at the bottom. In the flue gas turning zone at the bottom of the combustion chamber, the flue gas scours the convection tubes laterally. The straight tubes in the middle are a pure longitudinal scour zone, and the outlet zone is a transverse scour zone. This achieves a good combination of transverse and longitudinal scour. Although the convection tubes are arranged longitudinally, they have the effect of mixed transverse and longitudinal scour.

[0053] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0054] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A heat exchange device for an industrial boiler, comprising an industrial boiler membrane wall body (1), characterized in that: The inner wall of the industrial boiler membrane wall body (1) is fixedly connected with a plurality of second return springs (27). One end of the second return spring (27) is fixedly connected with a moving block (28). The outer wall of the moving block (28) is provided with a plurality of evenly distributed through grooves (31). The inner wall of the through grooves (31) is slidably connected with a fourth guide rod (32). The two ends of the fourth guide rod (32) are respectively rotatably installed with a third ball (33) and a fourth ball (34). The outer wall of the fourth guide rod (32) is fixedly connected with a second fixing plate (35). One end of the second fixing plate (35) is fixedly connected with a third return spring (36). The third return spring (36) is sleeved on the fourth guide rod (32). The other end of the third return spring (36) is fixedly connected to the outer wall of the moving block (28). A steam converter (6) is fixedly installed on the outer wall of the membrane wall body (1) of the industrial boiler. A second conveying pipe (10) is fixedly connected to the output end of the steam converter (6). A fixed frame (11) is fixedly connected to one end of the second conveying pipe (10). The second conveying pipe (10) and the fixed frame (11) are interconnected. A fixing block (13) is fixedly connected inside the fixing frame (11), and a turbine fan (14) is rotatably mounted on the outer wall of the fixing block (13). A first guide rod (15) is fixedly connected to the outer wall of the turbine fan (14). One end of the first guide rod (15) is rotatably connected to a mounting frame (12), the mounting frame (12) is fixedly connected to the outer wall of the industrial boiler membrane wall body (1), and a turning wheel (16) is fixedly connected to the outer wall of the first guide rod (15), the end of the turning wheel (16) is provided with an arc corner (17); A second guide rod (18) is slidably connected to the main body (1) of the industrial boiler membrane wall, and a first ball bearing (19) is rotatably installed at one end of the second guide rod (18); The outer wall of the second guide rod (18) is fixedly connected to a first fixing plate (20), and the outer wall of the first fixing plate (20) is fixedly connected to a first return spring (21). The first return spring (21) is sleeved on the second guide rod (18), and the other end of the first return spring (21) is fixedly connected to the outer wall of the industrial boiler membrane wall body (1). The other end of the second guide rod (18) is rotatably mounted with a second ball (22). The outer wall of the second guide rod (18) is provided with a plurality of evenly distributed first inclined surfaces (23), second inclined surfaces (24) and third inclined surfaces (25), which are arranged in a continuous manner. The outer wall of the movable block (28) is fixedly connected to a third guide rod (30).

2. The heat exchange device for an industrial boiler according to claim 1, characterized in that: Both ends of the movable block (28) are fixedly connected with protrusions (29), and the protrusions (29) are set as blocks with an arc shape; The inner wall of the industrial boiler membrane wall body (1) is fixedly connected with two limiting blocks (26) for cooperating with the protrusion (29) to limit the movement block (28).

3. The heat exchange device for an industrial boiler according to claim 2, characterized in that: The outer wall of the fixed frame (11) is fixedly connected to a first conveying pipe (9), which is connected to the fixed frame (11). One end of the first conveying pipe (9) is connected to the input end of the steam converter (6).

4. The heat exchange device for an industrial boiler according to claim 3, characterized in that: The industrial boiler membrane wall body (1) is equipped with a first heat exchange tube group (4), a second heat exchange tube group (7) and a third heat exchange tube group (8), which are interconnected.

5. The heat exchange device for an industrial boiler according to claim 4, characterized in that: One end of the first heat exchange tube group (4) is connected to the steam converter (6). The outer wall of the industrial boiler membrane wall body (1) is fixedly connected to a high-temperature flue gas inlet pipe (3). The interior of the industrial boiler membrane wall body (1) is provided with a combustion chamber (2). The combustion chamber (2) is connected to the high-temperature flue gas inlet pipe (3). The other end of the first heat exchange tube group (4) is fixedly connected to a return tube group (5). One end of the return tube group (5) is fixedly connected to the steam converter (6).

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