A heat pipe protection device

Abstract

The utility model relates to a boiler waste heat recovery device technical field especially relates to a kind of heating pipe protection device, including support pipe, connecting assembly and fume baffle;Two heating pipes between adjacent have gap, support pipe is arranged in the gap between two heating pipes between adjacent;Connecting assembly connects two heating pipes in the outside of support pipe;The middle part of fume baffle has mounting hole, in the flue gas flow direction of boiler tail, fume baffle and heating pipe are sequentially arranged, and fume baffle covers the connecting assembly in gap, fume baffle can block flue gas to enter the gap where connecting assembly is located, thereby reduce the turbulence flue gas amount formed in the position of support pipe and connecting assembly, reduce the abrasion of support pipe and heating pipe.

Description

Technical Field

[0001] This utility model relates to the technical field of boiler waste heat recovery devices, and in particular to a heat transfer tube protection device installed in the flue at the tail end of the boiler. Background Technology

[0002] Thermal power plants or power stations often have heat exchange tubes installed in the flue gas duct at the tail end of the boiler. These heat exchange tubes absorb waste heat from the flue gas within the duct. The heat exchange tubes are connected to economizers or superheaters to recover waste heat from the boiler flue gas. The heat exchange tubes in the flue gas duct are connected to support tubes via connecting assemblies. The support tubes are located in the gaps between adjacent heat exchange tubes. The flue gas velocity is relatively high in these gaps, and the connecting assemblies in these gaps alter the flue gas flow direction, creating turbulent flue gas at the location of the support tubes and connecting assemblies. This turbulent flue gas accelerates the wear and tear on both the support tubes and the heat exchange tubes. Utility Model Content

[0003] Based on this, the purpose of this utility model is to provide a heat-receiving pipe protection device for reducing turbulent flue gas at the connection between the support plate and the connecting component, and protecting the heat-receiving pipe installed in the flue at the tail of the boiler. The heat-receiving pipe protection device includes a support pipe, a connecting component and a smoke baffle.

[0004] There is a gap between two adjacent heated pipes, and the support pipe passes through the gap between the two adjacent heated pipes;

[0005] The connecting assembly connects the two heated tubes to the supporting tube;

[0006] The smoke baffle has a mounting hole in the middle. In the flue gas flow direction of the boiler tail flue, the smoke baffle and the heating pipe are arranged in sequence, and the smoke baffle covers the connecting assembly in the gap.

[0007] As a preferred embodiment, the smoke baffle includes a first plate-shaped portion and a second plate-shaped portion, the first plate-shaped portion and the second plate-shaped portion being arranged in a double-sloped roof structure, and the mounting hole being located at the top of the double-sloped roof structure.

[0008] As a preferred embodiment, the first plate-shaped portion is provided with a plurality of first smoke passage holes at intervals. In the direction of smoke flow, each first smoke passage hole is opposite to the gap, and each first smoke passage hole is offset from the connecting component.

[0009] As a preferred embodiment, the second plate-shaped portion is provided with a plurality of second smoke passage holes at intervals. In the direction of smoke flow, each second smoke passage hole is opposite to the gap, and each second smoke passage hole is offset from the connecting component.

[0010] As a preferred embodiment, the first plate-shaped portion and the second plate-shaped portion are separately disposed, the first plate-shaped portion having a first semi-circular hole at the end away from the heated tube, and the second plate-shaped portion having a second semi-circular hole at the end away from the heated tube, the first semi-circular hole and the second semi-circular hole forming the mounting hole.

[0011] As a preferred embodiment, the heat-receiving pipe protection device further includes a first clamp and a second clamp, wherein the first clamp is fixedly connected to the first plate-shaped portion and is located at the edge of the first semi-circular hole; the second clamp is fixedly connected to the second plate-shaped portion and is located at the edge of the second semi-circular hole; the first clamp and the second clamp are fastened together.

[0012] As a preferred embodiment, the end of the first plate-shaped portion away from the support tube and the end of the second plate-shaped portion away from the support tube both abut against the heated tube.

[0013] As a preferred embodiment, the length direction of the first plate-shaped portion is arranged obliquely in the flue gas flow direction of the boiler tail flue, and the width of the first plate-shaped portion is the same as the distance between the center members of the two adjacent heat-receiving tubes.

[0014] The second plate-shaped portion is arranged obliquely in the direction of flue gas flow in the tail flue of the boiler, and the width of the second plate-shaped portion is the same as the distance between the center members of the two adjacent heat-receiving tubes.

[0015] As a preferred embodiment, the heat-receiving pipe protection device further includes wear-resistant tiles; in the flue gas flow direction of the boiler tail flue, the wear-resistant tiles are provided on the side of both heat-receiving pipes facing the smoke baffle.

[0016] As a preferred embodiment, the connecting assembly includes a first connecting plate, a second connecting plate, a third clamp, a third connecting plate, a fourth connecting plate, and a fourth clamp;

[0017] The first connecting plate and the second connecting plate are arranged axially and spaced apart from each other on the support pipe, and the third clamp is arranged radially and spaced apart from the support pipe on the support pipe. The third clamp is connected to the first connecting plate and the second connecting plate; the gap between the first connecting plate, the second connecting plate and the third clamp forms a first limiting space.

[0018] The third connecting plate and the fourth connecting plate are arranged axially and spaced apart from each other on the support pipe, and the fourth clamp is arranged radially and spaced apart from the support pipe on the support pipe. The fourth clamp is connected to the third connecting plate and the fourth connecting plate; the gap between the third connecting plate, the fourth connecting plate and the fourth clamp forms a second limiting space.

[0019] The two heating tubes are respectively inserted into the first limiting space and the second limiting space.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0021] The present invention discloses a heat-receiving pipe protection device, comprising a support pipe, a connecting assembly, and a smoke baffle. A gap exists between two adjacent heat-receiving pipes, and the support pipe passes through the gap between the two adjacent heat-receiving pipes. The connecting assembly connects the two heat-receiving pipes to the outside of the support pipe. The smoke baffle has a mounting hole in its center. In the flue gas flow direction of the boiler tail flue, the smoke baffle and the heat-receiving pipes are arranged sequentially, and the smoke baffle covers the connecting assembly in the gap. The smoke baffle can prevent flue gas from entering the gap where the connecting assembly is located, thereby reducing the amount of turbulent flue gas formed at the location of the support pipe and the connecting assembly, and reducing the wear of the support pipe and the heat-receiving pipe. Attached Figure Description

[0022] Figure 1 This is an isometric view of the heat-receiving pipe protection device of this utility model;

[0023] Figure 2 This is a side view of the heat-receiving pipe protection device of this utility model;

[0024] Figure 3 This is a front view of the heat pipe protection device of this utility model;

[0025] Figure 4 This is an axonometric drawing of the first section of the makeup area;

[0026] Figure 5 Axonometric view of the second plate-like portion;

[0027] In the diagram, 100 is the heating pipe, 1 is the support pipe, 2 is the connecting assembly, 21 is the first connecting plate, 22 is the second connecting plate, 23 is the third clamp, 24 is the third connecting plate, 25 is the fifth connecting plate, 26 is the fourth clamp, 27 is the first limiting space, 28 is the second limiting space, 3 is the smoke baffle, 31 is the mounting hole, 32 is the first plate-shaped part, 321 is the first smoke passage hole, 322 is the first semi-circular hole, 33 is the second plate-shaped part, 331 is the second smoke passage hole, 332 is the second semi-circular hole, 34 is the first clamp, 35 is the second clamp, 4 is the gap, and 5 is the wear-resistant tile. Detailed Implementation

[0028] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0029] In the description of this utility model, it should be understood that the terms "upper," "lower," "left," "right," "top," and "bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. It should be understood that the terms "first," "second," etc., are used in this utility model to describe various information, but this information should not be limited to these terms; these terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this utility model, "first" information can also be called "second" information, and similarly, "second" information can also be called "first" information.

[0030] like Figures 1 to 5 As shown, the present invention provides a heat-receiving pipe protection device for protecting heat-receiving pipes 100 installed in the tail flue of a boiler. A preferred embodiment of the heat-receiving pipe protection device includes a support pipe 1, a connecting assembly 2, and a baffle plate 3. A gap 4 exists between two adjacent heat-receiving pipes 100, and the support pipe 1 passes through the gap 4 between the two adjacent heat-receiving pipes 100. The support pipe 1 can be fixed to the bottom wall or side wall of the tail flue of the boiler, or connected to the side wall of the tail flue of the boiler by suspension. In this embodiment, the support pipe 1 is connected to the top wall of the tail flue of the boiler by suspension. The support pipe 1 is arranged vertically, and the connecting assembly 2 connects two heat-receiving pipes 100 to the support pipe 1. Heating pipes 100 are respectively arranged on both sides of the connecting pipe. The smoke baffle 3 has a mounting hole 31 in the middle. In the flue gas flow direction of the boiler tail flue, the smoke baffle 3 and the heating pipes 100 are arranged in sequence, and the smoke baffle 3 covers the connecting component 2 located in the gap 4. Specifically, the connecting components 2 located in the gap 4 are arranged around the connecting pipe. The mounting hole 31 is located in the middle of the smoke baffle 3. The smoke baffle 3 around the mounting hole 31 can cover the connecting component 2 located in the gap 4, so as to prevent the high-velocity flue gas from directly impacting the connecting component 2 located in the gap 4, thereby reducing the amount of turbulent flue gas formed at the position of the support pipe 1 and the connecting component 2, and reducing the wear of the support pipe 1 and the heating pipe 100.

[0031] In this embodiment, the smoke baffle 3 includes a first plate-shaped portion 32 and a second plate-shaped portion 33. The first plate-shaped portion 32 and the second plate-shaped portion 33 are arranged in a double-sloped roof structure, and the mounting hole 31 is located at the top of the double-sloped roof structure. The double-sloped roof structure has a better airflow guiding effect and can reduce the turbulence formed by the flue gas at the junction of the first plate-shaped portion 32 and the support pipe 1, and at the junction of the second plate-shaped portion 33 and the support pipe 1. Specifically, the first plate-shaped portion 32 and the second plate-shaped portion 33 can be an arc-shaped plate or a flat plate. When an arc-shaped plate is used, the first plate-shaped portion 32 and the second plate-shaped portion 33 form a gable roof. When a flat plate is used, the first plate-shaped portion 32 and the second plate-shaped portion 33 form an inverted V-shaped roof.

[0032] To reduce the impact of the first plate-shaped portion 32 on the direction of flue gas flow, in this embodiment, the first plate-shaped portion 32 is provided with a plurality of first smoke passage holes 321 at intervals. In the direction of flue gas flow, each first smoke passage hole 321 is opposite to the gap 4, and each first smoke passage hole 321 is offset from the connecting component 2. Some of the flue gas impacting the first plate-shaped portion 32 can flow into the gap 4 through the first smoke passage holes 321. Since the first smoke passage holes 321 are offset from the connecting component 2, the flue gas flowing from the first smoke passage holes 321 into the gap 4 will not impact the connecting component 2.

[0033] To reduce the impact of the second plate-shaped portion 33 on the flue gas flow direction, in this embodiment, the second plate-shaped portion 33 is provided with a plurality of second smoke passage holes 331 at intervals. In the flue gas flow direction, each second smoke passage hole 331 is opposite to the gap 4, and each first smoke passage hole 321 is offset from the connecting component 2. Some of the flue gas impacting the second plate-shaped portion 33 can flow into the gap 4 through the second smoke passage holes 331. Since the second smoke passage holes 331 are offset from the connecting component 2, the flue gas flowing from the second smoke passage holes 331 into the gap 4 will not impact the connecting component 2.

[0034] To facilitate the processing and installation of the smoke baffle 3, in this embodiment, the first plate-shaped portion 32 and the second plate-shaped portion 33 are separately provided. The end of the first plate-shaped portion 32 away from the heating pipe 100 is provided with a first semi-circular hole 322, and the end of the second plate-shaped portion 33 away from the heating pipe 100 is provided with a second semi-circular hole 332. The first semi-circular hole 322 and the second semi-circular hole 332 are connected to form the mounting hole 31. During installation, the peripheral walls of the first semi-circular hole 322 and the second semi-circular hole 332 can be welded to the outside of the support pipe 1.

[0035] Furthermore, the heat-receiving pipe protection device also includes a first clamp 34 and a second clamp 35. The first clamp 34 is fixedly connected to the first plate-shaped portion 32 and is located at the edge of the first semi-circular hole 322. The second clamp 35 is fixedly connected to the second plate-shaped portion 33 and is located at the edge of the second semi-circular hole 332. The first clamp 34 and the second clamp 35 are fastened together. Specifically, bolt holes are provided at both ends of the first clamp 34 and both ends of the second semi-circular clamp. After the first clamp 34 and the second clamp 35 are engaged, two bolts are inserted into the corresponding bolt holes. Tightening the bolts can hold the first clamp 34 and the second clamp 35 on the outside of the support pipe 1. The first clamp 34 and the second clamp 35 are respectively welded to the first plate-shaped portion 32 and the second plate-shaped portion 33.

[0036] In this embodiment, to ensure the stability of the first plate-shaped portion 32 and the second plate-shaped portion 33 during operation, the ends of the first plate-shaped portion 32 and the second plate-shaped portion 33 away from the support tube 1 are both in contact with the heating tube 100. In other embodiments of this utility model, the ends of the first plate-shaped portion 32 and the second plate-shaped portion 33 away from the support tube 1 may be arranged at intervals from the heating tube 100.

[0037] In this embodiment, the length direction of the first plate-shaped portion 32 is inclined in the flue gas flow direction of the boiler tail flue, and the width of the first plate-shaped portion 32 is the same as the center-to-center distance between two adjacent heat-receiving tubes 100; the length direction of the second plate-shaped portion 33 is also inclined in the flue gas flow direction of the boiler tail flue, and the width of the second plate-shaped portion 33 is the same as the center-to-center distance between two adjacent heat-receiving tubes 100. This arrangement not only minimizes the amount of flue gas entering the gap 4, but also allows the heating surface of the heat-receiving tube 100 to contact the flue gas as much as possible, ensuring the heat absorption effect of the heat-receiving tube 100.

[0038] In this embodiment, the heat-receiving pipe protection device also includes wear-resistant tiles 5; in the flue gas flow direction of the boiler tail flue, wear-resistant tiles 5 are provided on the side of both heat-receiving pipes 100 facing the smoke baffle 3. Specifically, the first wear-resistant tile 5 and the second wear-resistant tile 5 are both semi-circular metal plates. The first wear-resistant tile 5 and the second wear-resistant tile 5 are respectively set on the smoke-facing side of the two heat-receiving pipes 100, thereby reducing the scouring of the heat-receiving pipes 100 by the flue gas. After the first wear-resistant tile 5 and the second wear-resistant tile 5 are damaged, only the first wear-resistant tile 5 and the second wear-resistant tile 5 need to be replaced, without replacing the heat-receiving pipes 100, which greatly reduces the maintenance workload.

[0039] In this embodiment, the connecting assembly 2 includes a first connecting plate 21, a second connecting plate 22, a first clamp 34, a third connecting plate 24, a fourth connecting plate 25, and a second clamp 35. The first connecting plate 21 and the second connecting plate 22 are arranged axially at intervals relative to each other in the support pipe 1, and the first clamp 34 is arranged radially at intervals relative to the support pipe 1. The first clamp 34 is connected to the first connecting plate 21 and the second connecting plate 22. The gap 4 between the first connecting plate 21, the second connecting plate 22, and the first clamp 34 forms a first limiting space 27. The third connecting plate 24 and the fourth connecting plate 25 are arranged axially at intervals relative to each other in the support pipe 1, and the second clamp 35 is arranged radially at intervals relative to the support pipe 1. The second clamp 35 is connected to the third connecting plate 24 and the fourth connecting plate 25. The gap 4 between the third connecting plate 24, the fourth connecting plate 25, and the second clamp 35 forms a second limiting space 28. Two heated pipes 100 are respectively inserted into the first limiting space 27 and the second limiting space 28. The first connecting plate 21, the second connecting plate 22, the third connecting plate 24, and the fourth connecting plate 25 are all opposite to the ridge of the double-sloped roof structure. In the direction of flue gas flow, the smoke baffle 3 can cover the parts of the first connecting plate 21, the second connecting plate 22, the third connecting plate 24, and the fourth connecting plate 25 that are opposite to the smoke baffle 3.

[0040] In summary, the heat-receiving pipe protection device of this utility model includes a support pipe 1, a connecting component 2, and a smoke baffle 3; there is a gap 4 between two adjacent heat-receiving pipes 100, and the support pipe 1 passes through the gap 4 between the two adjacent heat-receiving pipes 100; the connecting component 2 connects the two heat-receiving pipes 100 to the outside of the support pipe 1; the smoke baffle 3 has an installation hole 31 in the middle. In the flue gas flow direction of the boiler tail flue, the smoke baffle 3 and the heat-receiving pipes 100 are arranged sequentially, and the smoke baffle 3 covers the connecting component 2 in the gap 4. The smoke baffle 3 can block the flue gas from entering the gap 4 where the connecting component 2 is located, thereby reducing the amount of turbulent flue gas formed at the position of the support pipe 1 and the connecting component 2, and reducing the wear of the support pipe 1 and the heat-receiving pipes 100.

[0041] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A heat transfer tube protection device for protecting heat transfer tubes (100) installed in the flue at the tail end of a boiler, characterized in that, It includes a support pipe (1), a connecting assembly (2), and a smoke baffle (3); There is a gap (4) between two adjacent heating pipes (100), and the support pipe (1) passes through the gap (4) between two adjacent heating pipes (100); The connecting assembly (2) connects the two heated pipes (100) to the supporting pipe (1); The smoke baffle (3) has a mounting hole (31) in the middle. In the flue gas flow direction of the boiler tail flue, the smoke baffle (3) and the heating pipe (100) are arranged in sequence, and the smoke baffle (3) covers the connecting assembly (2) in the gap (4).

2. The heat-receiving pipe protection device according to claim 1, characterized in that, The smoke baffle (3) includes a first plate-shaped portion (32) and a second plate-shaped portion (33), the first plate-shaped portion (32) and the second plate-shaped portion (33) are arranged in a double-sloped roof structure, and the mounting hole (31) is located at the top of the double-sloped roof structure.

3. The heat-receiving pipe protection device according to claim 2, characterized in that, The first plate-shaped portion (32) is provided with a plurality of first smoke passage holes (321) at intervals. In the direction of smoke flow, each first smoke passage hole (321) is opposite to the gap (4), and each first smoke passage hole (321) is offset from the connecting component (2).

4. The heat-receiving pipe protection device according to claim 2, characterized in that, The second plate-shaped portion (33) is provided with a plurality of second smoke passage holes (331) spaced apart. In the direction of smoke flow, each second smoke passage hole (331) is opposite to the gap (4), and each second smoke passage hole (331) is offset from the connecting component (2).

5. The heat-receiving pipe protection device according to claim 2, characterized in that, The first plate-shaped portion (32) and the second plate-shaped portion (33) are separately provided. The first plate-shaped portion (32) has a first semi-circular hole (322) at one end away from the heating pipe (100), and the second plate-shaped portion (33) has a second semi-circular hole (332) at one end away from the heating pipe (100). The first semi-circular hole (322) and the second semi-circular hole (332) together form the mounting hole (31).

6. The heat-receiving pipe protection device according to claim 5, characterized in that, The heat-receiving pipe protection device further includes a first clamp (34) and a second clamp (35). The first clamp (34) is fixedly connected to the first plate-shaped part (32) and is located at the edge of the first semi-circular hole (322). The second clamp (35) is fixedly connected to the second plate-shaped part (33) and is located at the edge of the second semi-circular hole (332). The first clamp (34) and the second clamp (35) are fastened together.

7. The heat-receiving pipe protection device according to claim 2, characterized in that, The end of the first plate-shaped portion (32) away from the support tube (1) and the end of the second plate-shaped portion (33) away from the support tube (1) both abut against the heated tube (100).

8. The heat-receiving pipe protection device according to claim 2, characterized in that, The length direction of the first plate-shaped portion (32) is inclined in the flue gas flow direction of the tail flue of the boiler, and the width of the first plate-shaped portion (32) is the same as the distance between the center members of the two adjacent heat-receiving tubes (100). The length of the second plate-shaped portion (33) is arranged obliquely in the direction of flue gas flow in the tail flue of the boiler, and the width of the second plate-shaped portion (33) is the same as the distance between the center members of the two adjacent heat-receiving tubes (100).

9. The heat-receiving pipe protection device according to claim 1, characterized in that, The heat-receiving pipe protection device also includes wear-resistant tiles (5); in the flue gas flow direction of the boiler tail flue, the wear-resistant tiles (5) are provided on the side of the two heat-receiving pipes (100) facing the smoke baffle (3).

10. The heat-receiving pipe protection device according to claim 1, characterized in that, The connecting assembly (2) includes a first connecting plate (21), a second connecting plate (22), a third clamp (23), a third connecting plate (24), a fourth connecting plate (25), and a fourth clamp (26); The first connecting plate (21) and the second connecting plate (22) are arranged axially relative to each other on the support pipe (1), and the third clamp (23) is arranged radially relative to the support pipe (1). The third clamp (23) is connected to the first connecting plate (21) and the second connecting plate (22). The gap (4) between the first connecting plate (21), the second connecting plate (22) and the third clamp (23) forms a first limiting space (27). The third connecting plate (24) and the fourth connecting plate (25) are arranged axially relative to each other on the support pipe (1), and the fourth clamp (26) is arranged radially on the support pipe (1) at intervals from the support pipe (1). The fourth clamp (26) is connected to the third connecting plate (24) and the fourth connecting plate (25). The gap (4) between the third connecting plate (24), the fourth connecting plate (25) and the fourth clamp (26) forms a second limiting space (28). The two heating tubes (100) are respectively inserted into the first limiting space (27) and the second limiting space (28).

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