Mechanical anti-abrasion flow guide device based on boiler water cooling wall

Abstract

The utility model provides a mechanical anti-abrasion flow guide device based on a boiler water-cooled wall, which relates to the field of anti-abrasion of the boiler water-cooled wall, and comprises a water-cooled pipe and an anti-abrasion flow guide plate fixedly arranged on the outer side of the water-cooled pipe, a turbulent flow structure used for dispersing vortex flow is fixedly arranged above the anti-abrasion flow guide plate, and the turbulent flow structure comprises an inner plate and an outer plate. The inner side of the inner plate and the inner side of the outer plate are each provided with a plurality of honeycomb holes, the honeycomb holes of the inner plate and the honeycomb holes of the outer plate are arranged in a staggered mode, the inner plate and the outer plate which are provided with the honeycomb holes are arranged above the anti-abrasion flow guide plate, the inner plate and the outer plate can block between vortex flow and a water cooling pipe, and scouring of the vortex flow to the water cooling pipe is reduced; meanwhile, the vortex flow can be scattered when the vortex flow is in contact with the formed vortex flow, so that the vortex energy and impact force of the vortex flow are greatly reduced, the erosive wear of the vortex flow to the water cooling pipe is reduced, and the service life of the water cooling pipe is prolonged.

Description

A mechanical anti-wear flow guiding device based on boiler water-cooled wall Technical Field

[0001] This utility model relates to the field of anti-wear technology for boiler water-cooled walls, specifically a mechanical anti-wear guiding device based on boiler water-cooled walls. Background Technology

[0002] The water-cooled wall is the main heat-receiving part of the boiler. It consists of several rows of steel pipes distributed around the boiler furnace. It mainly absorbs the radiant heat of the high-temperature combustion products in the furnace, and the working fluid moves upward within it and evaporates upon heating.

[0003] Existing anti-wear devices for water-cooled walls are generally guide plates vertically welded to the water-cooled wall. Although the guide plates can effectively reduce the scouring of the water-cooled wall by impurities such as circulating ash and reduce the overall wear of the water-cooled wall, during use, circulating ash will accumulate on the guide plates and form a natural angle of accumulation of about 45°. Since the solid material flowing down the wall surface moves in the opposite direction to the solid material moving upward in the furnace, a vortex flow is generated locally, which reduces the angle of accumulation of the circulating ash. The solid material flowing down the furnace wall surface changes its flow direction in the interface area, thus causing scouring and wear on the water-cooled tubes. The vortex flow generated locally will cause scouring and wear on the water-cooled wall above the angle of accumulation of the circulating ash. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this utility model provides a mechanical anti-wear guiding device based on boiler water-cooled walls. By setting an inner plate and an outer plate with honeycomb holes above the anti-wear guiding plate, the inner and outer plates can not only block the vortex flow between the water-cooled pipe and reduce the scouring of the water-cooled pipe by the vortex flow, but also disperse the vortex flow when in contact with it, greatly reducing the vortex energy and impact force of the vortex flow. This reduces the scouring and wear caused by the vortex flow on the water-cooled pipe, improves the service life of the water-cooled pipe, and solves the problems mentioned in the background art.

[0005] Technical solution

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: a mechanical anti-wear guiding device based on a boiler water-cooled wall, comprising a water-cooled pipe and an anti-wear guiding plate fixedly installed on the outside of the water-cooled pipe. A turbulence structure for dispersing vortex flow is fixedly installed above the anti-wear guiding plate. The turbulence structure includes an inner plate and an outer plate. Both the inner and outer plates have a plurality of honeycomb holes on their inner sides. The honeycomb holes of the inner plate and the honeycomb holes of the outer plate are arranged alternately.

[0007] Furthermore, the height of the bottom of the inner and outer plates from the upper surface of the wear-resistant guide plate is greater than the width of the wear-resistant guide plate itself.

[0008] Furthermore, both the inner and outer panels are arc-shaped, and the arc-shaped inner wall of the inner panel fits into the outer wall of the water-cooling pipe.

[0009] Furthermore, a cavity is provided between the inner panel and the outer panel.

[0010] Furthermore, both the inner and outer panels are fixedly connected to the vertical plate, and the bottom of the vertical plate is fixedly connected to the anti-wear guide plate.

[0011] Furthermore, diagonal bracing rods are fixedly connected to the arc-shaped outer wall of the outer plate, and the bottom of the diagonal bracing rods is fixedly connected to the anti-wear guide plate.

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

[0013] By setting an inner plate and an outer plate with honeycomb holes above the anti-wear guide plate, and positioning the inner and outer plates outside the water-cooling pipe at a position higher than the anti-wear guide plate, the inner and outer plates can not only block the vortex flow between the water-cooling pipe and reduce the scouring of the water-cooling pipe by the vortex flow, but also disperse the vortex flow when in contact with it, greatly reducing the vortex energy and impact force of the vortex flow, thereby reducing the scouring and wear of the water-cooling pipe by the vortex flow and improving the service life of the water-cooling pipe. Attached Figure Description

[0014] Figure 1 is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 is a schematic diagram of the vortex flow scouring water-cooled pipe of this utility model;

[0016] Figure 3 is a schematic diagram of the connection structure between the wear-resistant guide plate and the inner and outer plates of this utility model.

[0017] Figure 4 is a schematic diagram of the inner and outer panel structures of this utility model.

[0018] Among them, 1. Water-cooled pipe; 2. Anti-wear guide plate; 3. Inner plate; 4. Outer plate; 5. Honeycomb holes; 6. Cavity; 7. Vertical plate; 8. Diagonal brace; 9. Accumulation angle; 10. Scouring zone. Detailed Implementation

[0019] 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 protection scope of the present utility model.

[0020] Referring to Figures 1-4, a mechanical anti-wear guiding device based on a boiler water-cooled wall includes a water-cooled pipe 1 and an anti-wear guiding plate 2 fixedly installed on the outside of the water-cooled pipe 1. A turbulence structure for dispersing vortex flow is fixedly installed above the anti-wear guiding plate 2. The turbulence structure includes an inner plate 3 and an outer plate 4. Both the inner plate 3 and the outer plate 4 have a plurality of honeycomb holes 5 on their inner sides. The honeycomb holes 5 of the inner plate 3 and the honeycomb holes 5 of the outer plate 4 are arranged alternately.

[0021] In this scheme: the circulating ash of the boiler falls onto the upper part of the anti-wear protrusion of the water-cooled wall and accumulates, forming a natural accumulation angle of about 45° 9. The remaining circulating ash slides down the slope to avoid scouring the water-cooled tube 1, thereby reducing wear. In the transition zone above the anti-wear protrusion of the water-cooled wall, the naturally falling circulating ash forms a slope on the horizontal protrusion, which is called the "soft landing" area. Since the solid material flowing down the wall is opposite to the direction of movement of the solid material moving upward in the furnace, a vortex flow is generated locally, which reduces the accumulation angle 9 of the circulating ash. The "soft landing" area has fewer fine particles and more large particles, resulting in a poor "soft landing" effect. The solid material flowing down the furnace wall changes its flow direction in the interface area, thus causing scouring and wear on the water-cooled tube 1.

[0022] As shown in Figure 2, after installing the anti-wear guide plate 2, although the anti-wear guide plate 2 can effectively reduce the scouring of the outer wall of the water-cooled pipe 1, the vortex flow generated during the circulation of ash will scour the water-cooled pipe 1 at the top of the accumulation angle 9, creating a scouring zone 10, which causes wear on the water-cooled pipe 1. After installing the inner plate 3 and the outer plate 4 on the anti-wear guide plate 2, as shown in Figure 1, the inner plate 3 and the outer plate 4 can block the vortex flow between the water-cooled pipe 1 and the vortex flow, preventing the vortex flow from directly scouring the water-cooled pipe 1. At the same time, when the inner plate 3 and the outer plate 4 come into contact with the vortex flow, the honeycomb holes 5 in the inner plate 3 and the outer plate 4 can disperse the vortex flow when in contact with the airflow, greatly reducing the vortex energy and impact force of the vortex flow, thereby reducing the scouring and wear of the water-cooled pipe 1 caused by the vortex flow.

[0023] The distance between the bottom of the inner plate 3 and the outer plate 4 and the upper surface of the anti-wear guide plate 2 is greater than the width of the anti-wear guide plate 2 itself.

[0024] In this embodiment: Since the angle of accumulation 9 is approximately 45°, when the angle of accumulation 9 is 45°, the cross section of the angle of accumulation 9 can be understood as an isosceles triangle. At this time, the height of the top of the angle of accumulation 9 is the same as that of the anti-wear guide plate 2. However, since the circulating ash will accumulate to a certain height on the anti-wear guide plate 2, the height of the anti-wear guide plate 2 needs to be greater than the width of the anti-wear guide plate 2. At the same time, the inner plate 3 and the outer plate 4 have a certain height, thus providing a large protection range. Even if the height of the top of the angle of accumulation 9 deviates, the inner plate 3 and the outer plate 4 can still effectively protect the water-cooled pipe 1.

[0025] Both the inner plate 3 and the outer plate 4 are arc-shaped, and the arc-shaped inner wall of the inner plate 3 is in contact with the outer wall of the water-cooling pipe 1.

[0026] In this embodiment: the arc-shaped inner plate 3 can be attached to the water cooling pipe 1 to reduce the air flow space between the water cooling pipe 1 and the inner plate 3, prevent circulating dust from entering between the water cooling pipe 1 and the inner plate 3 during air flow and affecting heat transfer, and maintain the heat conduction effect of the water cooling pipe 1.

[0027] A cavity 6 is provided between the inner panel 3 and the outer panel 4.

[0028] In this embodiment: after the vortex flow passes through the outer plate 4, it is dispersed in the cavity 6. Since the inner plate 3 and the outer plate 4 are both provided with honeycomb holes 5, when the vortex flow blows on the honeycomb holes 5, the honeycomb holes 5 can disperse the airflow. Furthermore, the honeycomb holes 5 of the inner plate 3 and the honeycomb holes 5 of the outer plate 4 are staggered, so that the airflow passing through the outer plate 4 will be blown onto the inner plate 3 instead of directly impacting the honeycomb holes 5 of the inner plate 3. This reduces the kinetic energy of the air flowing between the inner plate 3 and the outer plate 4 and reduces the impact force of the vortex flow on the water cooling pipe 1.

[0029] Both the inner plate 3 and the outer plate 4 are fixedly connected to the vertical plate 7, and the bottom of the vertical plate 7 is fixedly connected to the anti-wear guide plate 2.

[0030] In this embodiment, the upright plate 7 can support the inner plate 3 and the outer plate 4, keeping the positions of the inner plate 3 and the outer plate 4 stable.

[0031] An inclined brace 8 is fixedly connected to the arc-shaped outer wall of the outer plate 4, and the bottom of the inclined brace 8 is fixedly connected to the anti-wear guide plate 2.

[0032] In this embodiment, the diagonal brace 8 can support the arc-shaped outer wall of the outer plate 4, thereby cooperating with the vertical plate 7 to support the inner plate 3 and the outer plate 4 at two positions, improving the stability of the inner plate 3 and the outer plate 4.

[0033] It should be noted that in this paper, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0034] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A mechanical anti-wear guiding device based on a boiler water-cooled wall, comprising a water-cooled pipe (1) and an anti-wear guiding plate (2) fixedly installed on the outside of the water-cooled pipe (1), characterized in that: A turbulence structure for dispersing vortex flow is fixedly installed above the anti-wear guide plate (2). The turbulence structure includes an inner plate (3) and an outer plate (4). Several honeycomb holes (5) are opened on the inner side of both the inner plate (3) and the outer plate (4). The honeycomb holes (5) of the inner plate (3) and the honeycomb holes (5) of the outer plate (4) are arranged alternately.

2. The mechanical anti-wear guiding device based on boiler water-cooled wall according to claim 1, characterized in that: The height of the bottom of the inner plate (3) and the outer plate (4) from the upper surface of the anti-wear guide plate (2) is greater than the width of the anti-wear guide plate (2) itself.

3. A mechanical anti-wear guiding device based on a boiler water-cooled wall according to claim 1 or 2, characterized in that: Both the inner plate (3) and the outer plate (4) are arc-shaped, and the arc-shaped inner wall of the inner plate (3) is in contact with the outer wall of the water cooling pipe (1).

4. A mechanical anti-wear flow guiding device based on a boiler water wall according to claim 3, characterized in that: A cavity (6) is provided between the inner plate (3) and the outer plate (4).

5. A mechanical anti-wear flow guiding device based on the water-cooled walls of a boiler according to claim 1, characterized in that: The inner plate (3) and the outer plate (4) are both fixedly connected to the vertical plate (7), and the bottom of the vertical plate (7) is fixedly connected to the anti-wear guide plate (2).

6. A mechanical anti-wear guiding device based on a boiler water-cooled wall according to claim 5, characterized in that: An inclined brace (8) is fixedly connected to the arc-shaped outer wall of the outer plate (4), and the bottom of the inclined brace (8) is fixedly connected to the anti-wear guide plate (2).

Images