CFB (circulating fluid bed) wear-resistant plate with arc-shaped diversion trenches

Abstract

The utility model relates to the technical field of CFB (Circulating Fluidized Bed) guide plates, and discloses a CFB anti-wear plate with arc-shaped guide grooves. The technical problems that in the prior art, the anti-abrasion protection efficiency is low, the flow guide effect of a regular fluid channel is poor, and the structural stability is poor are solved. The CFB anti-abrasion plate is installed on a fin of a water cooling wall in the direction perpendicular to the liquid flow direction, the fin comprises a plurality of large semicircular columns which are arranged at intervals, small semicircular columns are arranged on the left side and the right side of each large semicircular column, and the CFB anti-abrasion plate with the arc-shaped flow guide grooves comprises a plurality of unit plates which are horizontally connected in a lap joint mode. One side of each unit plate is concaved inwards to form a large semicircular notch and a small semicircular notch which are attached to the corresponding fin, an arc-shaped plate in the same direction as the outer arc of the cross section of the corresponding fin is formed on the other side of each unit plate, at least one flow guide groove hole with the center axis being an arc line is formed in each unit plate, and the flow guide groove holes are formed in the periphery of the large semicircular column in a surrounding mode. According to the utility model, the anti-wear protection effect is obviously improved, the hydrodynamic characteristics are optimized, and the maintainability of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of CFB deflector plates, in particular to a CFB anti-wear plate with arc-shaped diversion grooves. Background Art

[0002] CFB deflector plates are mainly applied in circulating fluidized bed boilers. The purpose is to improve the gas-solid two-phase flow characteristics inside the boiler, improve the thermal efficiency, reduce wear and optimize the combustion process at the same time. In a CFB boiler, the design and layout of the deflector plates are quite crucial, and they play the following important roles: 1. Anti-wear protection: When the CFB boiler is operating, the internal solid particles (such as fuel particles, limestone, etc.) circulate together with the air flow, causing strong scouring wear to the internal surface of the boiler, especially the water-cooled wall. Through reasonable design, such as using specific geometric shapes and wear-resistant materials, the deflector plates can effectively slow down the impact speed of the solid particles and protect the water-cooled wall from wear. 2. Air flow guiding: The deflector plates can guide the flow direction of the gas-solid mixture, control its distribution in the furnace, maintain a good fluidization state, and promote the full combustion and heat transfer of the fuel.

[0003] The prior art Chinese patent document: 202110083201.2 discloses a profiling anti-wear plate, including a plate body. An inner arc edge matching the pipeline of the boiler water-cooled wall is arranged inside the plate body. A welding projection is arranged between adjacent inner arc edges. An outer arc edge corresponding to the inner arc edge is arranged outside the plate body. A smooth curved edge is used for transition between adjacent outer arc edges. The material of the plate body is a metal material for CFB boiler anti-wear plates.

[0004] However, during the implementation of the above solution, there are at least the following technical problems: low anti-wear protection efficiency, poor diversion effect of regular fluid channels, and poor structural stability. Therefore, it is urgent to propose a CFB anti-wear plate with arc-shaped diversion grooves. Summary of the Invention

[0005] In view of the above technical problems, the present disclosure provides a CFB anti-wear plate with arc-shaped diversion grooves, which solves the technical problems of low anti-wear protection efficiency, poor diversion effect of regular fluid channels, and poor structural stability in the prior art. By adopting diversion groove holes with an arc as the central axis and a clamping component convenient for installation and maintenance, the present invention effectively improves the anti-wear protection effect of the water-cooled wall fins in a CFB boiler, optimizes the heat exchange performance, reduces the operation and maintenance costs, and enhances the overall reliability and operation convenience.

[0006] According to one aspect of the present disclosure, a CFB anti-wear plate with an arc-shaped flow guiding groove is provided, which is installed perpendicular to the liquid flow direction on the fins of the water wall. The fins include a number of large semi-circular columns arranged at intervals, and small semi-circular columns are arranged on both the left and right sides of the large semi-circular columns. The CFB anti-wear plate with an arc-shaped flow guiding groove includes a number of unit plates that are horizontally lapped. One side of the unit plate is concavely formed with a large semi-circular notch and a small semi-circular notch that fit the fins. The other side of the unit plate forms an arc-shaped plate that is in the same direction as the outer arc of the cross-section of the fins. At least one flow guiding groove hole with an arc-shaped central axis is provided on the unit plate, and the flow guiding groove holes are arranged around the large semi-circular columns.

[0007] In some embodiments of the present disclosure, 3 flow guiding groove holes with an arc-shaped central axis are horizontally arranged at intervals on the unit plate, and the distance from the flow guiding groove holes to the fins is equal to the distance from the flow guiding groove holes to the outer edge of the arc-shaped plate.

[0008] In some embodiments of the present disclosure, circular flow guiding holes are also arranged at intervals on the unit plate, and the circular flow guiding holes are arranged at positions near the small semi-circular columns at both ends of the flow guiding groove holes.

[0009] In some embodiments of the present disclosure, a circular steel bar flow guiding net is installed in the circular flow guiding holes, and a circular cover plate is arranged on the circular steel bar flow guiding net and in the circular flow guiding holes.

[0010] In some embodiments of the present disclosure, an arc-shaped steel bar flow guiding net is installed in the flow guiding groove holes, and two independently openable and closable left cover plates and right cover plates are arranged on the arc-shaped steel bar flow guiding net and in the flow guiding groove holes.

[0011] In some embodiments of the present disclosure, the unit plates are limited and connected by a clamping assembly. The clamping assembly includes a plug-in part and a groove part respectively arranged at both ends of the unit plate, so that the plug-in part of one unit plate is inserted into the groove part of the adjacent unit plate.

[0012] The beneficial effects of the present utility model are as follows:

[0013] 1. By arranging large semi-circular columns and small semi-circular columns on both sides thereof on the fins, the large semi-circular notch and small semi-circular notch on the unit plate precisely fit the fin structure, increasing the contact area between the protection plate and solid particles in the fluid, effectively dispersing the impact force, reducing the direct wear on the water wall, and extending the service life of the equipment.

[0014] 2. The limited connection between the plug-in part and the groove part of the clamping assembly is arranged between the unit plates, simplifying the installation and disassembly process, enhancing the structural stability, facilitating rapid on-site assembly and adjustment, and also supporting replacement in case of local damage, reducing the maintenance cost.

[0015] 3. Optimize the fluid flow direction according to the contour of the large semi-cylindrical column, guide the fluid to smoothly bypass, reduce direct impact, and improve the heat exchange efficiency at the same time.

[0016] 4. The equidistant setting of the distance from the diversion groove hole to the fin and the arc plate ensures the pressure balance when the fluid passes through and avoids excessive local pressure.

[0017] 5. Circular diversion holes are arranged at both ends of the diversion groove hole near the small semi-cylindrical column, and cooperate with the steel bar diversion net and the round cover plate to further refine the fluid flow.

[0018] 6. The arc-shaped steel bar diversion net installed in the diversion groove hole strengthens the fluid guiding effect, and the design of the independently opening and closing cover plate provides flexibility for adjusting the opening size of the diversion groove to adapt to different working conditions.

[0019] 7. Through the design of the plug part and the groove part, the rapid assembly and disassembly of the unit plate are realized, the installation process is simplified, and local replacement or adjustment is convenient. Description of the Drawings

[0020] Figure 1 It is a schematic structural diagram of a CFB wear-resistant plate with an arc-shaped diversion groove;

[0021] Figure 2 It is a schematic structural diagram of a CFB wear-resistant plate with a steel bar diversion net;

[0022] Figure 3 It is a schematic structural diagram of the connection structure between unit plates;

[0023] Figure 4 It is a schematic structural diagram of the left cover plate and the right cover plate;

[0024] Figure 5 It is a schematic structural diagram of the scale;

[0025] Names of each component in the figure: 1, fin; 2, large semi-cylindrical column; 3, small semi-cylindrical column; 4, unit plate; 5, large semi-circular notch; 6, small semi-circular notch; 7, diversion groove hole; 8, circular steel bar diversion net; 9, arc plate; 10, circular diversion hole; 11, clamping assembly; 12, plug part; 13, groove part; 14, round cover plate; 15, arc-shaped steel bar diversion net; 16, left cover plate; 17, right cover plate. Detailed Implementation Modes

[0026] The following describes the preferred embodiments of the present invention with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention. Embodiment 1

[0027] This example discloses a CFB wear-resistant plate with an arc-shaped diversion groove. Refer to Figures 1 to 5, it is installed perpendicular to the liquid flow direction on the fin 1 of the water wall. The fin 1 includes a number of large semi-circular columns 2 arranged at intervals. Small semi-circular columns 3 are arranged on both the left and right sides of the large semi-circular column 2. The CFB wear-resistant plate with an arc-shaped flow guiding groove includes a number of unit plates 4 that are horizontally lapped. One side of the unit plate 4 is concave to form a large semi-circular notch 5 and a small semi-circular notch 6 that fit the fin 1.

[0028] On the other side of the unit plate 4, an arc-shaped plate 9 is formed in the same direction as the outer arc of the cross-section of the fin 1. Three flow guiding groove holes 7 with an arc-shaped central axis are arranged at intervals in the horizontal direction on the unit plate 4. The flow guiding groove holes 7 are arranged around the large semi-circular column 2. The distance from the flow guiding groove holes 7 to the fin 1 is equal to the distance from the flow guiding groove holes 7 to the outer edge of the arc-shaped plate 9.

[0029] Circular flow guiding holes 10 are also arranged at intervals on the unit plate 4. The circular flow guiding holes 10 are arranged at positions near the small semi-circular column 2 at both ends of the flow guiding groove holes 7.

[0030] A circular steel bar flow guiding net 8 is installed in the circular flow guiding hole 10, and a circular cover plate 14 is arranged on the circular steel bar flow guiding net 8 and in the circular flow guiding hole 10.

[0031] An arc-shaped steel bar flow guiding net 15 is installed in the flow guiding groove hole 7, and two independently openable and closable left cover plates 16 and right cover plates 17 are arranged on the arc-shaped steel bar flow guiding net 15 and in the flow guiding groove hole 7.

[0032] The unit plates 4 are limited and connected by a clamping component 11. The clamping component 11 includes a pin part 12 and a groove part 13 respectively arranged at both ends of the unit plate 4, so that the pin part 12 of one unit plate is inserted into the groove part 13 of the adjacent unit plate 4.

[0033] During operation, when the liquid flow passes through the fin 1, it first comes into partial contact with the unit plate 4, reducing the direct impact and lowering the wear risk of the water wall. Subsequently, the fluid is introduced into the diversion groove holes 7 with an arc-shaped central axis, and the diversion groove holes are arranged around the large semi-cylindrical column 2, optimizing the fluid flow direction, reducing turbulence, and improving the heat exchange efficiency. At the same time, the arc-shaped steel bar diversion net 15 further refines the fluid distribution in the diversion groove holes 7, guiding the fluid to pass smoothly and reducing the impact wear on the wear-resistant plate. The design of the arc plate 9 is in the same direction as the outer arc of the cross-section of the fin 1, which helps to evenly transfer heat and reduce heat stress concentration. At the same time, since the distance from the diversion groove hole 7 to the fin 1 is equal to the distance to the outer edge of the arc plate 9, it ensures a more balanced pressure distribution during fluid flow, avoiding structural damage caused by local overheating or excessive pressure. The combination of the circular steel bar diversion net 8 and the circular diversion holes 10, as well as the setting of the circular cover plate 14, not only enhances the structural strength but also provides convenience for cleaning and inspection. The design of the independently openable left cover plate 16 and right cover plate 17 facilitates the adjustment of the opening size and shape of the diversion groove holes, endowing the flexibility to adjust the diversion groove holes. Furthermore, it realizes the control of the fluid flow rate and velocity flowing through the wear-resistant plate. Optimize the heat exchange efficiency, balance the fluid distribution, and adapt to different working conditions. For example, when it is necessary to increase the fluid flow rate and accelerate heat exchange, more cover plates can be appropriately opened to increase the opening area of the diversion groove holes; conversely, when it is necessary to reduce wear or control the heat load in a specific area, the opening can be reduced to adjust the flow rate. Through the design of the clamping assembly 11, the pin part 12 and the groove part 13, the unit plates 4 can be quickly and firmly connected to each other, simplifying the on-site installation process and facilitating the replacement and maintenance of individual units.

[0034] Although some preferred embodiments of the present invention have been described, those skilled in the art can make additional changes and modifications to these embodiments once they learn the basic creative concept. Therefore, the appended claims are intended to be construed as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0035] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of this application and their equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims

1. A CFB wear-resistant plate with an arc-shaped flow guide groove is installed on the fin of the water wall perpendicular to the liquid flow direction. The fin includes several large semi-circular columns arranged at intervals, and small semi-circular columns are arranged on both the left and right sides of the large semi-circular columns. It is characterized in that: The CFB wear-resistant plate with an arc-shaped flow guide groove comprises a plurality of horizontally lapped unit plates. One side of the unit plate is concave to form a semi-circular large notch and a semi-circular small notch that fit the fins. The other side of the unit plate forms an arc-shaped plate in the same direction as the outer arc of the cross-section of the fin. At least one flow guide groove hole with an arc-shaped central axis is arranged on the unit plate, and the flow guide groove hole surrounds the outer periphery of the large semi-circular column.

2. The CFB wear-resistant plate with an arc-shaped diversion groove as described in claim 1 is characterized in that: Three flow guide groove holes with an arc-shaped central axis are horizontally and spacedly arranged on the unit plate, and the distance from the flow guide groove hole to the fin is equal to the distance from the flow guide groove hole to the outer edge of the arc-shaped plate.

3. The CFB wear-resistant plate with an arc-shaped diversion groove according to claim 1, characterized in that: Circular flow guide holes are also spacedly arranged on the unit plate, and the circular flow guide holes are arranged at positions close to the small semi-circular column at both ends of the flow guide groove hole.

4. The CFB wear-resistant plate with an arc-shaped diversion groove according to claim 3, characterized in that: A circular steel bar flow guide net is installed in the circular flow guide hole, and a circular cover plate is arranged on the circular steel bar flow guide net and in the circular flow guide hole.

5. The CFB wear-resistant plate with an arc-shaped diversion groove according to claim 1, characterized in that: An arc-shaped steel bar flow guide net is installed in the flow guide groove hole, and two independently openable and closable left cover plates and right cover plates are arranged on the arc-shaped steel bar flow guide net and in the flow guide groove hole.

6. The CFB wear-resistant plate with an arc-shaped diversion groove according to claim 1, characterized in that: The unit plates are limited and connected through a clamping assembly. The clamping assembly includes a pin part and a groove part respectively arranged at both ends of the unit plate, so that the pin part of one unit plate can be inserted into the groove part of the adjacent unit plate.

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