Hanging screen furnace wall anti-falling structure for boiler

Abstract

The utility model provides a hanging screen furnace wall anti-falling structure for a boiler, which relates to the technical field of circulating fluidized bed boilers and comprises a screen type superheater, a steel reinforcement framework and a hexsteel. According to the anti-falling structure of the hanging screen furnace wall for the boiler, the first framework, the second framework and the third framework are attached, welded and fixed to the three sections of pipelines of a screen type superheater in a segmented mode, then side supporting steel bars are vertically installed and welded, finally, the connecting positions of the frameworks are comprehensively welded and reinforced, and the first mesh, the second mesh and the third mesh are spliced and welded into a whole firstly; the hexsteel mesh is sleeved on the outer side of an installed steel reinforcement framework, the position is adjusted to enable the mesh to correspond to the framework and the framework is tightly wrapped by the U-shaped section, finally, a sleeve on the inner side of the hexsteel mesh is inserted and connected with a side supporting steel bar, and after checking and confirming that looseness does not exist, repair welding is performed to enhance the connection strength if necessary. The refractory material is uniformly smeared on the hexsteel from the bottom of the hexsteel by using a spatula, and the material is fully embedded into polygonal holes of the hexsteel to form an occlusion structure, so that the adhesive force is enhanced.

Description

Technical Field

[0001] This utility model relates to the field of circulating fluidized bed boiler technology, and in particular to a hanging screen furnace wall anti-fall-off structure for boilers. Background Technology

[0002] The screen-type superheater is located in the upper part of the furnace or at the outlet flue of a circulating fluidized bed boiler. It is a radiant or semi-radiant heating surface. Its main function is to heat saturated steam into superheated steam, thereby improving the steam's work capacity and quality; absorb excess heat in the upper part of the furnace, balance heat distribution, optimize combustion conditions, and prevent excessively high bed temperatures; at the same time, it reduces the flue gas temperature at the furnace outlet, prevents slagging on downstream heating surfaces, and can also enhance heat exchange by utilizing both radiation and convection heat transfer. Furthermore, its structure blocks some high-speed particle flow, reducing wear on downstream components and ensuring efficient, stable, and safe operation of the boiler.

[0003] To cope with the high-temperature operating environment, the outer surface of the screen-type superheater in existing circulating fluidized bed boilers is coated with high-temperature refractory material to extend its service life. However, the thermal expansion coefficients of the refractory material and the metal substrate of the screen-type superheater differ significantly, making them prone to internal stress during temperature fluctuations, which can cause the refractory layer to crack and peel off easily. Utility Model Content

[0004] This utility model provides a hanging screen furnace wall anti-fall structure for boilers, which solves the problem of easy cracking and peeling of the refractory layer mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a hanging screen furnace wall anti-fall-off structure for boilers, comprising a screen-type superheater, a steel reinforcement frame, and a hexagonal mesh. Multiple screen-type superheaters are fixed to the inner side wall of the furnace water-cooled wall. Each screen-type superheater is formed by multiple rows of pipes arranged at equal intervals. The bottom of the outermost pipe of each screen-type superheater is fixed to the steel reinforcement frame. Side-bracing steel bars are fixed to both sides of each screen-type superheater, and the bottom of the side-bracing steel bars is fixed to the steel reinforcement frame. The hexagonal mesh is sleeved and fixed to the outside of the steel reinforcement frame.

[0006] Preferably, the screen-type superheater is a three-section type, with the first section set horizontally, the third section set vertically, and the second section inclinedly connecting the first and third sections.

[0007] Preferably, the steel reinforcement cage includes cage one, cage two, and cage three. Cage one, cage two, and cage three are connected end to end to form a whole by a fixed connection. Cage one is attached to and fixed on the first section of the screen-type superheater, cage two is attached to and fixed on the second section of the screen-type superheater, and cage three is attached to and fixed on the third section of the screen-type superheater.

[0008] Preferably, multiple side bracing steel bars are evenly distributed and fixedly connected to both sides of the first frame, the second frame, and the third frame, and the corresponding side bracing steel bars on the first frame, the second frame, and the third frame are respectively arranged perpendicular to the three frames.

[0009] Preferably, the tortoise shell mesh includes mesh panel one, mesh panel two, and mesh panel three. Mesh panel one, mesh panel two, and mesh panel three are connected end to end to form a whole by a fixed connection. Mesh panel one corresponds to the position of skeleton one, mesh panel two corresponds to the position of skeleton two, and mesh panel three corresponds to the position of skeleton three.

[0010] Preferably, the cross-section of the tortoise shell mesh is U-shaped.

[0011] Preferably, the tortoise shell mesh has multiple polygonal holes evenly distributed throughout.

[0012] Preferably, multiple sleeves are evenly distributed and fixedly connected to both inner walls of the tortoise shell mesh, and one side of each sleeve is open.

[0013] Preferably, a vertical groove is provided on the upper surface of the connection between the sleeve and the inner wall of the tortoise shell mesh, and multiple inner rings are arranged and fixed inside the sleeve.

[0014] Preferably, the sleeve corresponds to the position of the side support reinforcement, and the sleeve is sleeved on the outer periphery of the side support reinforcement.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] The first, second, and third sections of the frame are welded and fixed to the three sections of the screen-type superheater pipes. Then, the side support steel bars are vertically installed and welded. Finally, the joints of the frame are fully welded and reinforced to ensure a solid whole. First, the splicing points of mesh panels one, two, and three are welded together. After checking that the shape is correct, they are fitted onto the outside of the installed steel frame. The position is adjusted so that the mesh corresponds to the frame and the U-shaped cross-section tightly wraps the frame. Finally, the inner sleeve of the hexagonal mesh is inserted and connected to the side support steel bars. After checking and confirming that there is no looseness, additional welding is done if necessary to strengthen the connection. Starting from the bottom of the hexagonal mesh, the refractory material is evenly applied to the mesh with a trowel. Utilizing the polygonal holes of the hexagonal mesh, the material is fully embedded in the holes to form an interlocking structure and enhance adhesion. After application, the surface of the refractory material is smoothed, removing excess material to ensure a smooth surface. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the boiler wall hanging screen anti-fall-off structure of this utility model;

[0018] Figure 2This is a side view of the boiler wall hanging screen anti-fall-off structure of this utility model;

[0019] Figure 3 This is a structural schematic diagram showing the installation position of the reinforcing steel cage of this utility model;

[0020] Figure 4 This is a schematic diagram of the tortoise shell mesh structure of this utility model;

[0021] Figure 5 for Figure 4 Enlarged view of point A.

[0022] Numbered in the diagram: 1. Furnace water-cooled wall; 2. Screen-type superheater; 3. Reinforcing steel frame; 31. Frame 1; 32. Frame 2; 33. Frame 3; 4. Side bracing reinforcement; 5. Hexagonal wire mesh; 51. Mesh 1; 52. Mesh 2; 53. Mesh 3; 54. Polygonal hole; 6. Sleeve; 61. Vertical groove; 62. Inner ring. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0024] This utility model provides a hanging screen furnace wall anti-fall-off structure for boilers, such as... Figure 1 and Figure 2 As shown, it includes a screen-type superheater 2, a steel frame 3 and a tortoise shell mesh 5. Multiple screen-type superheaters 2 are fixed on the inner side wall of the furnace water-cooled wall 1. The screen-type superheater 2 is formed by multiple rows of pipes arranged at equal intervals. The screen-type superheater 2 is a three-section type. The first section is set horizontally, the third section is set vertically, and the second section is inclined to connect the first section and the third section.

[0025] like Figure 2 and Figure 3As shown, the bottom of the outermost pipe of the screen-type superheater 2 is fixed with a steel reinforcement frame 3. The steel reinforcement frame 3 is made of high-strength steel and includes frame one 31, frame two 32 and frame three 33. Frame one 31, frame two 32 and frame three 33 are connected end to end to form a whole. Frame one 31 is attached to the first section of the screen-type superheater 2, frame two 32 is attached to the second section of the screen-type superheater 2, and frame three 33 is attached to the third section of the screen-type superheater 2. Side support steel bars 4 are fixed on both sides of the screen-type superheater 2. Multiple side support steel bars 4 are evenly distributed and fixed on both sides of frame one 31, frame two 32 and frame three 33. The corresponding side support steel bars 4 on frame one 31, frame two 32 and frame three 33 are respectively set perpendicular to the three. The bottom of the side support steel bars 4 is fixed to the steel reinforcement frame 3. Frame 1 (31), Frame 2 (32), and Frame 3 (33) are all fixed to the screen-type superheater 2. The sides of multiple side-bracing steel bars 4 are also welded to the sides of the screen-type superheater 2, forming a supporting structure with the main frame of the steel bar frame 3, which enhances the structural stability.

[0026] like Figure 4 As shown, the hexagonal wire mesh 5 is fitted and fixed to the outside of the reinforcing steel frame 3. The hexagonal wire mesh 5 includes mesh panel 51, mesh panel 52, and mesh panel 53. Mesh panels 51, 52, and 53 are connected end-to-end to form a single unit. Mesh panel 51 corresponds to frame 31, mesh panel 52 corresponds to frame 32, and mesh panel 53 corresponds to frame 33. The cross-section of the hexagonal wire mesh 5 is U-shaped. Multiple polygonal holes 54 are evenly distributed on the hexagonal wire mesh 5. The hexagonal wire mesh 5 provides all-around protection for the reinforcing steel frame 3. The evenly distributed polygonal holes 54 on the surface of the hexagonal wire mesh 5 not only reduce the weight of the hexagonal wire mesh 5 and lower material costs, but more importantly, during furnace wall construction, they provide excellent adhesion points for the cast refractory material, significantly enhancing the bonding force between the refractory material and the hexagonal wire mesh 5, thereby improving the overall strength and stability of the furnace wall.

[0027] like Figure 5As shown, multiple sleeves 6 are evenly distributed and fixedly connected to both inner walls of the hexagonal mesh 5, with one side of each sleeve 6 being open. A vertical groove 61 is formed through the upper surface of the sleeve 6 where it connects to the inner wall of the hexagonal mesh 5. Multiple inner rings 62 are arranged and fixed inside the sleeve 6. The sleeve 6 corresponds to the side support steel bar 4, and is fitted onto the outer periphery of the side support steel bar 4. The open side of the sleeve 6 facilitates installation. The multiple inner rings 62 inside the sleeve 6 increase friction when the side support steel bar 4 is inserted into the sleeve 6 through the opening, allowing the sleeve 6 to quickly and accurately align with the side support steel bar 4, resulting in a tight fit. The sleeve 6 and the side support steel bar 4 can then be welded together at the opening. The hexagonal mesh 5 and the steel reinforcement skeleton 3 work together under stress. When the furnace wall is subjected to external forces such as thermal stress and mechanical vibration, the sleeve 6 can evenly transfer the force to the steel reinforcement skeleton 3.

[0028] Using this utility model, such as Figure 1 and Figure 2 As shown, during installation, skeleton 1 (31), skeleton 2 (32), and skeleton 3 (33) are welded and fixed to the three sections of pipe in the screen-type superheater 2 in sections. Then, the side support steel bars 4 are vertically installed and welded. Finally, the joints of the skeletons are fully welded and reinforced to ensure that they become a solid whole. First, the mesh 1 (51), mesh 2 (52), and mesh 3 (53) are spliced ​​and spot-welded into a whole. After checking that the shape is correct, they are placed on the outside of the installed steel skeleton 3. The position is adjusted so that the mesh corresponds to the skeleton and the U-shaped cross section tightly wraps the skeleton. Finally, the inner sleeve 6 of the hexagonal mesh 5 is inserted and connected to the side support steel bars 4. After checking that there is no looseness, if necessary, additional welding is done at the opening to enhance the connection strength. Starting from the bottom of the hexagonal mesh 5, the refractory material is evenly applied to the hexagonal mesh 5 with a trowel. The polygonal holes 54 of the hexagonal mesh 5 are used to make the material fully embedded in the holes to form an interlocking structure and enhance adhesion. After the application is completed, the surface of the refractory material is smoothed and excess material is removed to ensure that the surface is flat and smooth.

[0029] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A hanging screen furnace wall anti-fall-off structure for boilers, comprising screen-type superheaters (2), wherein multiple screen-type superheaters (2) are fixed on the inner sidewall of the furnace water-cooled wall (1), and the screen-type superheaters (2) are formed by multiple rows of pipes arranged at equal intervals, characterized in that, It also includes a steel reinforcement frame (3) and a tortoise shell mesh (5). The steel reinforcement frame (3) is fixed to the bottom of the outermost pipe of the screen-type superheater (2). Side support steel bars (4) are fixed on both sides of the screen-type superheater (2). The bottom of the side support steel bars (4) is fixed on the steel reinforcement frame (3). The tortoise shell mesh (5) is sleeved and fixed on the outside of the steel reinforcement frame (3).

2. The boiler wall hanging screen anti-fall-off structure according to claim 1, characterized in that, The screen-type superheater (2) is a three-section type, with the first section set horizontally, the third section set vertically, and the second section inclinedly connecting the first and third sections.

3. The boiler wall hanging screen anti-fall-off structure according to claim 2, characterized in that, The steel reinforcement cage (3) includes a first cage (31), a second cage (32), and a third cage (33). The first cage (31), the second cage (32), and the third cage (33) are connected end to end to form a whole. The first cage (31) is attached to the first section of the screen-type superheater (2), the second cage (32) is attached to the second section of the screen-type superheater (2), and the third cage (33) is attached to the third section of the screen-type superheater (2).

4. The boiler wall hanging screen anti-fall-off structure according to claim 3, characterized in that, Multiple side bracing steel bars (4) are evenly distributed and fixedly connected to both sides of the first frame (31), the second frame (32), and the third frame (33). The corresponding side bracing steel bars (4) on the first frame (31), the second frame (32), and the third frame (33) are respectively set perpendicular to the three.

5. The boiler wall hanging screen anti-fall-off structure according to claim 3, characterized in that, The tortoise shell mesh (5) includes mesh panel one (51), mesh panel two (52) and mesh panel three (53). Mesh panel one (51), mesh panel two (52) and mesh panel three (53) are connected end to end to form a whole by a fixed connection. Mesh panel one (51) corresponds to the position of skeleton one (31), mesh panel two (52) corresponds to the position of skeleton two (32), and mesh panel three (53) corresponds to the position of skeleton three (33).

6. The boiler wall hanging screen anti-fall-off structure according to claim 5, characterized in that, The cross-section of the tortoise shell mesh (5) is U-shaped.

7. The boiler wall hanging screen anti-fall-off structure according to claim 5, characterized in that, The tortoise shell mesh (5) is provided with multiple polygonal holes (54) evenly distributed on it.

8. The boiler wall hanging screen anti-fall-off structure according to claim 5, characterized in that, Multiple sleeves (6) are evenly distributed and fixedly connected on both inner sidewalls of the tortoise shell mesh (5), and one side of each sleeve (6) is open.

9. The boiler wall hanging screen anti-fall-off structure according to claim 8, characterized in that, A vertical groove (61) is provided on the upper surface of the connection between the sleeve (6) and the inner wall of the tortoise shell mesh (5), and multiple inner rings (62) are arranged and fixed inside the sleeve (6).

10. The boiler wall hanging screen anti-fall-off structure according to claim 9, characterized in that, The sleeve (6) is positioned corresponding to the side support steel bar (4), and the sleeve (6) is fitted onto the outer periphery of the side support steel bar (4).

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