Alloy anti-abrasion structure of water cooling wall of boiler

Abstract

The invention discloses a boiler water-cooled wall alloy anti-abrasion structure which structurally comprises a water-cooled wall tube main body, a first anti-abrasion cylinder is arranged in an inner cavity of the water-cooled wall tube main body, an anti-abrasion assembly used for buffering flue gas ash particles is arranged in an inner cavity of the first anti-abrasion cylinder, and a second anti-abrasion cylinder is arranged in an inner cavity of the first anti-abrasion cylinder. A dismounting assembly used for replacing the second anti-abrasion cylinder is arranged at one end of the first anti-abrasion cylinder. According to the invention, dust-containing airflow passing through at a high speed can be buffered through the second anti-wear cylinder, and after the second anti-wear cylinder is subjected to impact force, the second anti-wear cylinder can disperse the impact force to the connected arc-shaped sheets, so that the arc-shaped sheets deform, the impact wear force of the dust-containing airflow is reduced, and the service life of the dust-containing airflow is prolonged. And finally, residual impact abrasion force is absorbed through the first anti-abrasion barrel, so that abrasion of the water-cooled wall tube main body caused by the ash-containing airflow is reduced, and the situation that the water-cooled wall tube main body explodes and leaks is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of water - cooled wall anti - abrasion, and specifically relates to an alloy anti - abrasion structure for boiler water - cooled walls. Background Technique

[0002] The water - cooled wall is the main heat - receiving part of the boiler. It consists of several rows of steel pipes and is distributed around the boiler furnace. The inside of it is filled with flowing water or steam, and it receives the heat of the flame in the boiler furnace from the outside. It mainly absorbs the radiant heat of the high - temperature combustion products in the furnace, and the working medium moves upward in it, is heated and evaporated. As the main heat - receiving part of the boiler, the boiler water - cooled wall undertakes the important task of absorbing the radiant heat of the high - temperature combustion products in the furnace. However, during the operation of the water - cooled wall, due to the flow of high - temperature flue gas in the furnace and the impact of ash particles carried in the flue gas, the inner wall of the water - cooled wall tube is extremely vulnerable to abrasion. In severe cases, it may even lead to the bursting and leakage of the water - cooled wall tube, seriously affecting the safe operation and service life of the boiler.

[0003] Traditional water - cooled wall anti - abrasion technologies mainly rely on spraying anti - abrasion coatings outside the tubes, but these methods have many deficiencies.

[0004] First of all, although spraying anti - abrasion coatings can improve the abrasion resistance of the tube wall to a certain extent, the coatings are prone to peeling in high - temperature environments. And once the coatings fail, the tube wall will be directly exposed to the impact of ash particles, and the abrasion problem will be more serious. Moreover, traditional anti - abrasion technologies lack an effective buffering mechanism and cannot effectively absorb the energy generated by the impact of ash particles, resulting in limited anti - abrasion effects. When serious abrasion requires maintenance, it often needs to stop the furnace for large - scale repairs, which not only increases the maintenance cost but also affects the normal operation of the boiler.

[0005] In view of the above problems, the present invention proposes an alloy anti - abrasion structure for boiler water - cooled walls. Summary of the Invention

[0006] The purpose of the present invention is to provide an alloy anti - abrasion structure for boiler water - cooled walls, which solves the problems in the background technique. That is, although spraying anti - abrasion coatings can improve the abrasion resistance of the tube wall to a certain extent, the coatings are prone to peeling in high - temperature environments. And once the coatings fail, the tube wall will be directly exposed to the impact of ash particles, and the abrasion problem will be more serious. Moreover, traditional anti - abrasion technologies lack an effective buffering mechanism and cannot effectively absorb the energy generated by the impact of ash particles, resulting in limited anti - abrasion effects. When serious abrasion requires maintenance, it often needs to stop the furnace for large - scale repairs, which not only increases the maintenance cost but also affects the normal operation of the boiler.

[0007] To achieve the above object, the present invention provides the following technical solution: an alloy anti-wear structure for the water wall of a boiler, including a main water wall tube. A first anti-wear cylinder is arranged in the inner cavity of the main water wall tube. An anti-wear component for buffering flue gas ash particles is arranged in the inner cavity of the first anti-wear cylinder. A second anti-wear cylinder is arranged in the inner cavity of the first anti-wear cylinder. One end of the first anti-wear cylinder is provided with a disassembly component for replacing the second anti-wear cylinder. The length of the first anti-wear cylinder is the same as that of the second anti-wear cylinder.

[0008] As a preferred embodiment of the present invention, a first positioning ring is welded to one end of the second anti-wear cylinder. The size of the first positioning ring is adapted to the size of the second anti-wear cylinder. A plurality of arc-shaped pieces are welded to the outer side of the second anti-wear cylinder. A tungsten carbide coating is arranged on the inner side of the second anti-wear cylinder, and the tungsten carbide coating is evenly sprayed on the inner wall of the second anti-wear cylinder.

[0009] By adopting the above technical solution, through the setting of the tungsten carbide coating, the anti-wear effect of the second anti-wear cylinder is improved, the erosion of the second anti-wear cylinder by high-temperature particles is reduced, and thus the service life of the second anti-wear cylinder is improved.

[0010] As a preferred embodiment of the present invention, the end of the arc-shaped piece is attached to the inner wall of the first anti-wear cylinder, and the length of the arc-shaped piece is the same as that of the first anti-wear cylinder. The thickness of the tungsten carbide coating is set to 3MM.

[0011] By adopting the above technical solution, through the setting of the arc-shaped piece, after being impacted by the ash-containing gas flow, the impact force is dispersed to the arc-shaped piece, causing the arc-shaped piece to deform, thereby reducing the impact wear force of the ash-containing gas flow.

[0012] As a preferred embodiment of the present invention, a second positioning ring is welded to the side of the first anti-wear cylinder close to the first positioning ring. The first positioning ring corresponds to the second positioning ring. A plurality of fixing blocks are arranged on the inner side of the second positioning ring. A sliding groove is opened on the side of the fixing block close to the first positioning ring, and a sliding block is arranged in the inner cavity of the sliding groove.

[0013] By adopting the above technical solution, through the cooperation of the first positioning ring and the second positioning ring, it is convenient to install and connect the first anti-wear cylinder and the second anti-wear cylinder, and thus it is convenient to replace the second anti-wear cylinder subsequently.

[0014] As a preferred embodiment of the present invention, the size of the sliding block is adapted to the size of the sliding groove, and the sliding block is slidably connected to the sliding groove. A second threaded hole is opened in the middle of the sliding block. First threaded holes are opened around the first positioning ring, and the first threaded holes correspond to the second threaded hole one by one.

[0015] By adopting the above technical solution, the slider cooperates with the slide groove, thereby avoiding the situation where the second anti-wear cylinder is hindered by force during the buffering process.

[0016] As a preferred embodiment of the present invention, the size of the first threaded hole is the same as the size of the second threaded hole, and the inner cavities of the first threaded hole and the second threaded hole are provided with positioning screws, the size of the positioning screws are adapted to the size of the first threaded hole and the second threaded hole, and the positioning screws are spirally connected to the first threaded hole and the second threaded hole respectively.

[0017] By adopting the above technical solution and setting the positioning screw, the first anti-wear cylinder and the second anti-wear cylinder can be connected and limited, thereby ensuring the stability of the second anti-wear cylinder when it is eroded by particles.

[0018] As a preferred embodiment of the present invention, four fixing blocks are provided, the fixing blocks are connected to the second positioning ring by welding, and the fixing blocks are provided between adjacent arc-shaped pieces, and the distance between the fixing blocks and the outer wall of the second anti-wear cylinder is set to 2CM.

[0019] By adopting the above technical solution and setting the fixed block, the second anti-wear cylinder can be limited, thereby avoiding excessive deformation of the arc-shaped sheet, thereby ensuring the service life of the arc-shaped sheet and further reducing the replacement frequency of the second anti-wear cylinder.

[0020] As a preferred embodiment of the present invention, a support spring is fixedly installed in the inner cavity of the slide groove, the other end of the support spring is fixedly connected to the slider, and the support spring corresponds to the fixed block one by one, and the first anti-wear cylinder and the second anti-wear cylinder are both made of copper alloy heat-conducting material.

[0021] By adopting the above technical solution and setting the support spring, the deformation force of the arc-shaped sheet can be further offset, and the support spring can drive the second threaded hole to align with the first threaded hole, thereby facilitating the positioning and connection of the first anti-wear cylinder and the second anti-wear cylinder.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention can buffer the high-speed ash-containing airflow through the second anti-wear cylinder, and after the second anti-wear cylinder is subjected to impact force, the second anti-wear cylinder will disperse the impact force to the connected arc-shaped sheet, thereby causing the arc-shaped sheet to deform, thereby reducing the impact wear force of the ash-containing airflow, and finally the first anti-wear cylinder absorbs the remaining impact wear force, thereby reducing the wear caused by the ash-containing airflow on the water-cooled wall tube body, thereby avoiding the occurrence of tube bursts and leakage of the water-cooled wall tube body.

[0023] It can also cooperate with the tungsten carbide coating on the second anti-wear cylinder, thereby reducing the erosion of the high-temperature particles on the second anti-wear cylinder, and then improving the service life of the second anti-wear cylinder. When the tungsten carbide coating on the second anti-wear cylinder and the inner wall of the second anti-wear cylinder are excessively worn, the positioning screw can be separated from the first threaded hole and the second threaded hole, and then the second anti-wear cylinder can be pulled out through auxiliary equipment for replacement, thereby improving the buffer anti-wear effect on the main body of the water-cooled wall tube.

[0024] Also, through the setting of the sliding groove on the fixing block, when the second anti-wear cylinder squeezes and deforms the arc-shaped piece, due to the existence of the sliding groove, the situation of being obstructed by force during the buffering process of the second anti-wear cylinder is avoided. Moreover, during the buffering process of the second anti-wear cylinder, after the second anti-wear cylinder contacts the fixing block, the fixing block limits the second anti-wear cylinder, thereby avoiding the situation of excessive deformation of the arc-shaped piece, ensuring the service life of the arc-shaped piece, and further reducing the replacement frequency of the second anti-wear cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Other features, objects, and advantages of the present invention will become more apparent by reading the detailed description of the non-limiting embodiments with reference to the following drawings:

[0026] Figure 1 It is a three-dimensional structure schematic diagram of an alloy anti-wear structure for a boiler water-cooled wall of the present invention;

[0027] Figure 2 It is an exploded structure schematic diagram of an alloy anti-wear structure for a boiler water-cooled wall of the present invention;

[0028] Figure 3 It is a partial enlarged view at A of an alloy anti-wear structure for a boiler water-cooled wall of the present invention;

[0029] Figure 4 It is a three-dimensional structure schematic diagram of the second anti-wear cylinder of an alloy anti-wear structure for a boiler water-cooled wall of the present invention;

[0030] Figure 5 It is a side view structure schematic diagram of the first anti-wear cylinder of an alloy anti-wear structure for a boiler water-cooled wall of the present invention.

[0031] In the figure: 1, main body of the water-cooled wall tube; 2, first anti-wear cylinder; 3, second anti-wear cylinder; 4, first positioning ring; 5, arc-shaped piece; 6, tungsten carbide coating; 7, first threaded hole; 8, second positioning ring; 9, fixing block; 10, sliding groove; 11, slider; 12, second threaded hole; 13, support spring; 14, positioning screw. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0033] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0034] See also Figures 1 - 5 The present invention provides a technical solution: a boiler water-cooled wall alloy anti-wear structure, including a water-cooled wall tube body 1, the inner cavity of the water-cooled wall tube body 1 is provided with a first anti-wear cylinder 2, the inner cavity of the first anti-wear cylinder 2 is provided with an anti-wear component for buffering flue gas ash particles, the inner cavity of the first anti-wear cylinder 2 is provided with a second anti-wear cylinder 3, one end of the first anti-wear cylinder 2 is provided with a disassembly component for replacing the second anti-wear cylinder 3, and the length of the first anti-wear cylinder 2 is the same as the length of the second anti-wear cylinder 3.

[0035] In the present invention, when the flue gas ash particles enter the second anti-abrasion cylinder 3, the second anti-abrasion cylinder 3 conducts the heat of the flue gas ash particles. The second anti-abrasion cylinder 3 transfers the heat to the arc-shaped piece 5, and the arc-shaped piece 5 then transfers it to the first anti-abrasion cylinder 2. Finally, the first anti-abrasion cylinder 2 transfers the heat to the main body of the water-cooled wall tube 1. At the same time, the second anti-abrasion cylinder 3 buffers the high-speed ash-containing gas flow. After the second anti-abrasion cylinder 3 is subjected to an impact force, the second anti-abrasion cylinder 3 will disperse the impact force to the connected arc-shaped piece 5, causing the arc-shaped piece 5 to deform, thereby reducing the impact wear force of the ash-containing gas flow. Finally, the first anti-abrasion cylinder 2 absorbs the remaining impact wear force, reducing the wear of the ash-containing gas flow on the main body of the water-cooled wall tube 1, and thus avoiding the occurrence of tube burst and leakage of the main body of the water-cooled wall tube 1. At the same time, in cooperation with the tungsten carbide coating 6 on the second anti-abrasion cylinder 3, the erosion of the second anti-abrasion cylinder 3 by high-temperature particles is reduced, thereby increasing the service life of the second anti-abrasion cylinder 3. When the tungsten carbide coating 6 on the second anti-abrasion cylinder 3 and the inner wall of the second anti-abrasion cylinder 3 are worn excessively, by removing the four positioning screws 14 on the first positioning ring 4, separating the positioning screws 14 from the first threaded hole 7 and the second threaded hole 12, and then pulling out the second anti-abrasion cylinder 3 for replacement through auxiliary equipment, the buffer and anti-abrasion effect on the main body of the water-cooled wall tube 1 is improved. At the same time, due to the setting of the chute 10 on the fixing block 9, when the second anti-abrasion cylinder 3 squeezes and deforms the arc-shaped piece 5, the existence of the chute 10 avoids the situation of being obstructed by force during the buffering process of the second anti-abrasion cylinder 3. Moreover, during the buffering process of the second anti-abrasion cylinder 3, after the second anti-abrasion cylinder 3 contacts the fixing block 9, the fixing block 9 limits the second anti-abrasion cylinder 3, thereby avoiding the situation of excessive deformation of the arc-shaped piece 5, ensuring the service life of the arc-shaped piece 5, and further reducing the replacement frequency of the second anti-abrasion cylinder 3.

[0036] In an alternative embodiment, one end of the second anti-abrasion cylinder 3 is welded with a first positioning ring 4. The size of the first positioning ring 4 is adapted to the size of the second anti-abrasion cylinder 3. A plurality of arc-shaped pieces 5 are welded on the outer side of the second anti-abrasion cylinder 3. A tungsten carbide coating 6 is provided on the inner side of the second anti-abrasion cylinder 3, and the tungsten carbide coating 6 is evenly sprayed on the inner wall of the second anti-abrasion cylinder 3.

[0037] It should be noted that through the setting of the tungsten carbide coating 6, the anti-abrasion effect of the second anti-abrasion cylinder 3 is improved, the erosion of the second anti-abrasion cylinder 3 by high-temperature particles is reduced, and thus the service life of the second anti-abrasion cylinder 3 is increased.

[0038] In an alternative embodiment, the end of the arc-shaped piece 5 is in contact with the inner wall of the first anti-abrasion cylinder 2, and the length of the arc-shaped piece 5 is the same as the length of the first anti-abrasion cylinder 2. The thickness of the tungsten carbide coating 6 is set to 3MM.

[0039] It should be noted that through the setting of the arc-shaped piece 5, after being impacted by the ash-containing air flow, the impact force is dispersed onto the arc-shaped piece 5, causing the arc-shaped piece 5 to deform, thereby reducing the impact wear force of the ash-containing air flow.

[0040] In an alternative embodiment, a second positioning ring 8 is welded to the side of the first anti-wear cylinder 2 close to the first positioning ring 4. The first positioning ring 4 corresponds to the second positioning ring 8. A plurality of fixing blocks 9 are arranged inside the second positioning ring 8. A chute 10 is formed on the side of the fixing block 9 close to the first positioning ring 4, and a slider 11 is arranged inside the chute 10.

[0041] It should be noted that through the cooperation of the first positioning ring 4 and the second positioning ring 8, it is convenient to install and connect the first anti-wear cylinder 2 and the second anti-wear cylinder 3, and further convenient to replace the second anti-wear cylinder 3 subsequently.

[0042] In an alternative embodiment, the size of the slider 11 is adapted to the size of the chute 10, and the slider 11 is slidably connected to the chute 10. A second threaded hole 12 is formed in the middle of the slider 11. First threaded holes 7 are formed around the first positioning ring 4, and the first threaded holes 7 correspond to the second threaded hole 12 one by one.

[0043] It should be noted that through the cooperation of the slider 11 and the chute 10, it is possible to avoid the situation of being hindered by force during the buffering process of the second anti-wear cylinder 3.

[0044] In an alternative embodiment, the size of the first threaded hole 7 is the same as the size of the second threaded hole 12. A positioning screw 14 is arranged inside the first threaded hole 7 and the second threaded hole 12. The size of the positioning screw 14 is adapted to the size of the first threaded hole 7 and the second threaded hole 12, and the positioning screw 14 is screwed to the first threaded hole 7 and the second threaded hole 12 respectively.

[0045] It should be noted that through the setting of the positioning screw 14, the connection between the first anti-wear cylinder 2 and the second anti-wear cylinder 3 can be limited, and further the stability of the second anti-wear cylinder 3 when being scoured by particles is ensured.

[0046] In an alternative embodiment, four fixing blocks 9 are provided. The fixing blocks 9 are connected to the second positioning ring 8 by welding, and the fixing blocks 9 are arranged between adjacent arc-shaped pieces 5. The distance between the fixing blocks 9 and the outer wall of the second anti-wear cylinder 3 is set to 2 CM.

[0047] It should be noted that through the setting of the fixing blocks 9, the second anti-wear cylinder 3 can be limited, and further the situation of excessive deformation of the arc-shaped piece 5 can be avoided, thereby ensuring the service life of the arc-shaped piece 5 and further reducing the replacement frequency of the second anti-wear cylinder 3.

[0048] In an alternative embodiment, a support spring 13 is fixedly installed in the inner cavity of the chute 10. The other end of the support spring 13 is fixedly connected to the slider 11, and the support spring 13 corresponds to the fixed block 9 one by one. Both the first anti-wear cylinder 2 and the second anti-wear cylinder 3 are made of copper alloy heat-conducting material.

[0049] It should be noted that through the arrangement of the support spring 13, the deformation force of the arc-shaped piece 5 can be further offset, and the support spring 13 can drive the second threaded hole 12 to align with the first threaded hole 7, thereby facilitating the positioning connection of the first anti-wear cylinder 2 and the second anti-wear cylinder 3.

[0050] The foregoing has shown and described the basic principles, main features and advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, in any regard, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claimed invention.

[0051] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An alloy anti-wear structure for the boiler water wall, comprising a main body of the water wall tube (1), characterized in that: A first anti-wear cylinder (2) is arranged in the inner cavity of the main body (1) of the water-cooled wall tube. An anti-wear assembly for buffering flue gas ash particles is arranged in the inner cavity of the first anti-wear cylinder (2). A second anti-wear cylinder (3) is arranged in the inner cavity of the first anti-wear cylinder (2). One end of the first anti-wear cylinder (2) is provided with a disassembly assembly for replacing the second anti-wear cylinder (3). The length of the first anti-wear cylinder (2) is the same as that of the second anti-wear cylinder (3).

2. The alloy anti-wear structure of the boiler water wall according to claim 1, characterized in that: A first positioning ring (4) is welded to one end of the second anti-wear cylinder (3). The size of the first positioning ring (4) is adapted to that of the second anti-wear cylinder (3). A plurality of arc-shaped pieces (5) are welded to the outer side of the second anti-wear cylinder (3). A tungsten carbide coating (6) is arranged on the inner side of the second anti-wear cylinder (3), and the tungsten carbide coating (6) is evenly sprayed on the inner wall of the second anti-wear cylinder (3).

3. A boiler water-cooled wall alloy anti-wear structure according to claim 2, characterized in that: The end of the arc-shaped piece (5) is attached to the inner wall of the first anti-wear cylinder (2), and the length of the arc-shaped piece (5) is the same as that of the first anti-wear cylinder (2). The thickness of the tungsten carbide coating (6) is set to 3MM.

4. A boiler water wall alloy anti-wear structure according to claim 3, characterized in that: A second positioning ring (8) is welded to one side of the first anti-wear cylinder (2) close to the first positioning ring (4). The first positioning ring (4) corresponds to the second positioning ring (8). A plurality of fixing blocks (9) are arranged on the inner side of the second positioning ring (8). A chute (10) is opened on one side of the fixing block (9) close to the first positioning ring (4). A slider (11) is arranged in the inner cavity of the chute (10).

5. A boiler water-cooled wall alloy anti-wear structure according to claim 4, characterized in that: The size of the slider (11) is adapted to that of the chute (10), and the slider (11) is slidably connected to the chute (10). A second threaded hole (12) is opened in the middle of the slider (11). First threaded holes (7) are opened around the first positioning ring (4), and the first threaded holes (7) correspond to the second threaded holes (12) one by one.

6. A boiler water wall alloy anti-wear structure according to claim 5, characterized in that: The size of the first threaded hole (7) is the same as that of the second threaded hole (12). A positioning screw (14) is arranged in the inner cavities of the first threaded hole (7) and the second threaded hole (12). The size of the positioning screw (14) is adapted to those of the first threaded hole (7) and the second threaded hole (12). The positioning screw (14) is respectively screwed to the first threaded hole (7) and the second threaded hole (12).

7. The alloy anti-wear structure of a boiler water-cooled wall according to claim 6, characterized in that: There are four fixing blocks (9). The fixing blocks (9) are connected to the second positioning ring (8) by welding, and the fixing blocks (9) are arranged between adjacent arc-shaped pieces (5). The distance between the fixing blocks (9) and the outer wall of the second anti-wear cylinder (3) is set to 2CM.

8. A boiler water wall alloy anti-wear structure according to claim 7, characterized in that: A support spring (13) is fixedly installed in the inner cavity of the chute (10). The other end of the support spring (13) is fixedly connected to the slider (11), and the support springs (13) correspond to the fixing blocks (9) one by one. Both the first anti-wear cylinder (2) and the second anti-wear cylinder (3) are made of copper alloy heat-conducting materials.

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