Boiler separator inlet furnace wall anti-falling structure

Abstract

The utility model provides a kind of boiler separator import furnace wall anti-falling structure, it is related to circulating fluidized bed boiler technical field, including separator main body, import flue, anchor rod, reinforcing mesh and tortoise shell net.The boiler separator import furnace wall anti-falling structure, anchor rod is fixed in specified position, provide support base for subsequent structure, then reinforcing mesh is installed on anchor rod by butt joint hole, then tortoise shell net is sleeved on anchor rod by bushing, and fastening is used using threaded sleeve, finally anti-falling structure surface is daubed refractory material.By the synergistic effect of anchor rod, reinforcing mesh and tortoise shell net, the stability and impact resistance of furnace wall structure are enhanced, the damage of refractory material due to structural stress concentration, airflow scouring, thermal expansion and contraction and other factors is reduced.The stable operation of boiler is ensured, the reliability and service life of equipment are improved, the maintenance cost and production risk of enterprise are reduced, and significant economic benefit and safety benefit are obtained.

Description

Technical Field

[0001] This utility model relates to the field of circulating fluidized bed boiler technology, and in particular to a structure for preventing the boiler separator inlet furnace wall from falling off. Background Technology

[0002] The separator body of a circulating fluidized bed boiler is a core component of the boiler combustion system. Its main function is to separate solid particles (such as unburned coal particles and desulfurizing agents) carried in high-temperature flue gas from the flue gas, allowing the particles to return to the furnace to continue combustion or reaction, thus achieving material recycling. The operating conditions in the inlet area of ​​the separator body are extremely harsh. During boiler operation, the inlet flue gas temperature typically reaches 850-1000℃. At this temperature, the metal furnace walls will rapidly oxidize and their strength will decrease, necessitating the protection of the furnace walls with refractory materials.

[0003] Current methods involve mixing refractory aggregates, powders, binders, and water in a specific ratio, then pouring the mixture into molds or directly casting it onto the furnace wall surface. After compaction by vibration, it is cured. The connection between the separator's main inlet flue and the separator body is a region of abrupt geometric change, where the flow direction and velocity of flue gas and materials change drastically, creating complex turbulence. The hydrodynamic stress generated by this turbulence, combined with the mechanical stress from the thermal expansion of the flue, leads to stress concentration at diagonal points. The refractory material, subjected to alternating stress over a long period, gradually develops microcracks. With increasing operating time, these cracks propagate, causing the refractory material to detach. After the refractory material detaches, the metal furnace wall is directly exposed to the high-temperature flue gas, resulting in a rapid increase in furnace wall temperature. This can lead to furnace wall deformation and cracking, causing backflow of cold air and affecting combustion conditions within the furnace. Utility Model Content

[0004] This utility model provides a structure to prevent the refractory wall from falling off at the inlet of a boiler separator, which solves the problem mentioned in the background art where refractory materials are subjected to alternating stress for a long time, and micro-cracks gradually form inside, leading to the peeling off of the refractory material as the operating time increases.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a boiler separator inlet furnace wall anti-fall-off structure, comprising a separator body, an inlet flue, anchor rods, a steel mesh, and a hexagonal mesh. The inlet flue is located on one side of the separator body. Multiple anchor rods are evenly distributed and fixedly connected to the side wall of the inlet flue and the inner side wall of the separator body. Two steel meshes are respectively fixedly connected to the separator body and the inlet flue through the anchor rods. The hexagonal mesh is fixed to the side of the steel mesh.

[0006] Preferably, the anchor bolt fixed to the inlet flue is located on the side wall of the inlet flue near the separator body, and the anchor bolt fixed to the separator body is located on the inner side wall of the separator body near the inlet flue.

[0007] Preferably, the reinforcing mesh includes multiple vertical reinforcing bars and multiple horizontal reinforcing bars, the multiple vertical reinforcing bars are equidistantly arranged in the horizontal direction, the multiple horizontal reinforcing bars are equidistantly arranged in the vertical direction, and the vertical reinforcing bars and horizontal reinforcing bars are fixed at intersections.

[0008] Preferably, a connecting hole is provided at the intersection of the vertical reinforcing bar and the horizontal reinforcing bar, and the reinforcing mesh is set on the corresponding anchor rod through the connecting hole.

[0009] Preferably, the tortoise shell mesh is composed of multiple evenly distributed and fixed meshes.

[0010] Preferably, the grid is a hollow frame, and the cross-section of the grid is polygonal.

[0011] Preferably, a sleeve is provided at the center of each grid, and multiple connecting rods are provided between the sleeve and the grid. The two ends of the connecting rods are respectively fixed to the inner sidewall of the grid and the outer sidewall of the sleeve, and a through groove is provided on the surface of the connecting rod.

[0012] Preferably, the upper end face of the mesh is higher than the upper end face of the sleeve, and the lower end face of the mesh is higher than the lower end face of the sleeve.

[0013] Preferably, the tortoise shell mesh is installed on the corresponding anchor rod through the sleeve.

[0014] Preferably, the free end of the anchor bolt is threadedly connected to a threaded sleeve, and the hexagonal mesh is located between the threaded sleeve and the reinforcing mesh.

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

[0016] Anchor bolts are fixed at designated locations to provide a supporting foundation for subsequent structures. Then, reinforcing mesh is installed on the anchor bolts through butt joints. Next, a hexagonal wire mesh is fitted onto the anchor bolts using sleeves and secured with threaded sleeves. Finally, refractory material is applied to the surface of the anti-detachment structure. During boiler operation, this device effectively solves the problem of refractory material easily detaching at the connection between the inlet flue and the separator body. Through the synergistic effect of anchor bolts, reinforcing mesh, and hexagonal wire mesh, the stability and impact resistance of the furnace wall structure are enhanced, reducing damage to the refractory material caused by structural stress concentration, airflow scouring, and thermal expansion and contraction. This ensures stable boiler operation, improves equipment reliability and service life, and reduces maintenance costs and production risks for the enterprise, resulting in significant economic and safety benefits. Attached Figure Description

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

[0018] Figure 2 This is a schematic diagram showing the location of the steel mesh laying according to this utility model;

[0019] Figure 3 This is a schematic diagram of the tortoise shell mesh structure of this utility model;

[0020] Figure 4 for Figure 3 Enlarged view of point B;

[0021] Figure 5 This is a schematic diagram of the structure of the anchor rod and threaded sleeve of this utility model.

[0022] Figure 6 for Figure 2 Enlarged view of point A;

[0023] Figure 7 This is a schematic diagram of the steel mesh structure of this utility model.

[0024] The following are the labels in the diagram: 1. Separator body; 2. Inlet flue; 3. Anchor bolt; 4. Reinforcing mesh; 41. Vertical reinforcing bar; 42. Horizontal reinforcing bar; 43. Butt hole; 5. Hexagonal mesh; 51. Mesh; 52. Sleeve; 53. Connecting rod; 531. Through groove; 6. Threaded sleeve. Detailed Implementation

[0025] 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.

[0026] This utility model provides a structure to prevent the boiler separator inlet furnace wall from falling off, such as Figure 1 and Figure 2As shown, the system includes a separator body 1, an inlet flue 2, anchor bolts 3, a reinforcing mesh 4, and a hexagonal mesh 5. The inlet flue 2 is located on one side of the separator body 1. Multiple anchor bolts 3 are evenly distributed and fixedly connected to both the side wall of the inlet flue 2 and the inner side wall of the separator body 1. Two reinforcing meshes 4 are fixedly connected to the separator body 1 and the inlet flue 2 respectively via anchor bolts 3. The hexagonal mesh 5 is fixed to the side of the reinforcing mesh 4. The anchor bolts 3 fixed to the inlet flue 2 are located on the side wall of the inlet flue 2 near the separator body 1, while the anchor bolts 3 fixed to the separator body 1 are located on the inner side wall of the separator body 1 near the inlet flue 2. The anchor bolts 3 are made of high-strength heat-resistant alloy material, with one end firmly embedded in the metal wall of the flue and the separator, and the other end having threads on its outer circumference to provide a stable support foundation for subsequent structures.

[0027] like Figure 6 and Figure 7 As shown, the reinforcing mesh 4 includes multiple vertical reinforcing bars 41 and multiple horizontal reinforcing bars 42. The multiple vertical reinforcing bars 41 are equidistant from each other in the horizontal direction, and the multiple horizontal reinforcing bars 42 are equidistant from each other in the vertical direction. The vertical reinforcing bars 41 and the horizontal reinforcing bars 42 are fixed at intersections. A butt joint hole 43 is provided at the intersection of the vertical reinforcing bars 41 and the horizontal reinforcing bars 42, and the reinforcing mesh 4 is set on the corresponding anchor rod 3 through the butt joint hole 43.

[0028] The butt joint 43 at the intersection of the vertical reinforcing bars 41 and the horizontal reinforcing bars 42 fits perfectly with the anchor rod 3, allowing the reinforcing mesh 4 to be accurately fitted onto the anchor rod 3. The reinforcing mesh 4 not only enhances the overall integrity of the furnace wall structure but also disperses external stresses, preventing localized stress concentrations from damaging the refractory material.

[0029] like Figure 3 and Figure 4 As shown, the tortoise shell mesh 5 is composed of multiple evenly distributed and fixed grids 51. Each grid 51 is a hollow frame, and its cross-section is polygonal. Figure 5 As shown, a sleeve 52 is installed at the center of each grid 51. Multiple connecting rods 53 are installed between the sleeve 52 and the grid 51. The two ends of the connecting rods 53 are fixed to the inner wall of the grid 51 and the outer wall of the sleeve 52, respectively. The sleeve 52 and the connecting rod 53 at the center of each grid 51 cooperate with each other to form a stable support system. A through groove 531 is opened through the surface of the connecting rod 53. The upper end of the grid 51 is higher than the upper end of the sleeve 52, and the lower end of the grid 51 is higher than the lower end of the sleeve 52. The hexagonal mesh 5 is installed on the corresponding anchor rod 3 through the sleeve 52. The free end of the anchor rod 3 is threadedly connected to a threaded sleeve 6, and the hexagonal mesh 5 is located between the threaded sleeve 6 and the reinforcing mesh 4. After the reinforcing mesh 4 is installed, the hexagonal mesh 5 is fixed to its side. The hexagonal mesh 5 is sleeved on the anchor rod 3 through the sleeve 52, and the hexagonal mesh 5 is fastened between the reinforcing mesh 4 and the threaded sleeve 6.

[0030] Anchor bolts 3, reinforcing mesh 4, and hexagonal mesh 5 fit together tightly. After installation, refractory material is applied to the surface of the structure. The refractory material fills the hollow spaces of the mesh 51, forming a tenon-and-mortise interlocking structure with the hexagonal mesh 5. The mesh 51 of the hexagonal mesh 5 acts like a mold, defining the shape of the refractory material so that it tightly "bites" the mesh 51 after curing. This effectively prevents relative displacement between the refractory material and the hexagonal mesh 5, maintaining the stability of the overall structure even when subjected to high-temperature airflow or mechanical vibration, and preventing the refractory material from peeling off in large pieces.

[0031] Using this utility model, such as Figure 1 and Figure 2 As shown, the inner walls of the separator body 1 and the inlet flue 2 are first cleaned to ensure the installation surface is clean and flat. Then, anchor rods 3 are fixed at designated positions to provide a supporting foundation for subsequent structures. Next, steel mesh 4 is installed on the anchor rods 3 through the butt joint holes 43. Then, the hexagonal wire mesh 5 is fitted onto the anchor rods 3 through the sleeves 52 and secured with threaded sleeves 6. Finally, refractory material is applied to the surface of the anti-detachment structure. During boiler operation, this device effectively solves the problem of easy detachment of refractory material at the connection between the inlet flue 2 and the separator body 1. Through the synergistic effect of anchor rods 3, steel mesh 4, and hexagonal wire mesh 5, the stability and impact resistance of the furnace wall structure are enhanced, reducing damage to the refractory material caused by structural stress concentration, airflow scouring, thermal expansion and contraction, etc. This ensures the stable operation of the boiler, improves the reliability and service life of the equipment, and reduces the maintenance costs and production risks of the enterprise, resulting in significant economic and safety benefits.

[0032] 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 structure for preventing the boiler separator inlet wall from falling off, comprising a separator body (1) and an inlet flue (2), wherein the inlet flue (2) is disposed on one side of the separator body (1), characterized in that, It also includes anchor bolts (3), steel mesh (4) and tortoise shell mesh (5). Multiple anchor bolts (3) are evenly distributed and fixedly connected to the side wall of the inlet flue (2) and the inner side wall of the separator body (1). Two steel meshes (4) are fixedly connected to the separator body (1) and the inlet flue (2) respectively through the anchor bolts (3). The tortoise shell mesh (5) is fixed to the side of the steel mesh (4).

2. The boiler separator inlet furnace wall anti-fall-off structure according to claim 1, characterized in that, The anchor rod (3) fixed to the inlet flue (2) is located on the side wall of the inlet flue (2) near the separator body (1), and the anchor rod (3) fixed to the separator body (1) is located on the inner side wall of the separator body (1) near the inlet flue (2).

3. The boiler separator inlet furnace wall anti-fall-off structure according to claim 2, characterized in that, The steel mesh (4) includes multiple vertical steel bars (41) and multiple horizontal steel bars (42). The multiple vertical steel bars (41) are equidistant from each other in the horizontal direction, and the multiple horizontal steel bars (42) are equidistant from each other in the vertical direction. The vertical steel bars (41) and horizontal steel bars (42) are fixed at intersections.

4. The boiler separator inlet furnace wall anti-fall-off structure according to claim 3, characterized in that, The vertical reinforcing bars (41) and the horizontal reinforcing bars (42) are provided with a through hole (43), and the reinforcing mesh (4) is set on the corresponding anchor rod (3) through the through hole (43).

5. The boiler separator inlet furnace wall anti-fall-off structure according to claim 3, characterized in that, The tortoise shell mesh (5) is composed of multiple meshes (51) evenly distributed and fixed.

6. The boiler separator inlet furnace wall anti-fall-off structure according to claim 5, characterized in that, The grid (51) is a hollow frame, and the cross-section of the grid (51) is a polygon.

7. The boiler separator inlet furnace wall anti-fall-off structure according to claim 6, characterized in that, Each of the grids (51) has a sleeve (52) at its center. Multiple connecting rods (53) are provided between the sleeve (52) and the grid (51). The two ends of the connecting rods (53) are fixed to the inner wall of the grid (51) and the outer wall of the sleeve (52), respectively. A through groove (531) is provided on the surface of the connecting rod (53).

8. The boiler separator inlet furnace wall anti-fall-off structure according to claim 7, characterized in that, The upper end face of the mesh (51) is higher than the upper end face of the sleeve (52), and the lower end face of the mesh (51) is higher than the lower end face of the sleeve (52).

9. The boiler separator inlet furnace wall anti-fall-off structure according to claim 7, characterized in that, The tortoise shell mesh (5) is installed on the corresponding anchor rod (3) through the sleeve (52).

10. The boiler separator inlet furnace wall anti-fall-off structure according to claim 9, characterized in that, The free end of the anchor rod (3) is threadedly connected to a threaded sleeve (6), and the tortoise shell mesh (5) is located between the threaded sleeve (6) and the steel mesh (4).

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