CFB (circulating fluid bed) boiler water cooling wall anti-abrasion device

Abstract

The utility model discloses a CFB (circulating fluid bed) boiler water-cooled wall anti-abrasion device, which relates to the technical field of boiler water-cooled wall anti-abrasion, and comprises a boiler body, a boiler outer wall is arranged on the outer side of the boiler body, a boiler water-cooled wall is arranged on the inner side of the boiler body, the boiler water-cooled wall consists of a plurality of water-cooled wall tubes, and fins are arranged between adjacent water-cooled wall tubes. A plurality of supports are vertically distributed on the surface of the boiler water cooling wall, a plurality of mounting plates are arranged on the front sides of the supports, a transverse guide plate is detachably mounted between every two adjacent mounting plates, a vertical guide plate is detachably mounted between the upper mounting plate and the lower mounting plate, a refractory layer is arranged on the outer wall of a water cooling wall tube, and an anti-abrasion layer is arranged on the outer wall of the refractory layer. The transverse flow guide plate and the vertical flow guide plate are detachably mounted on the mounting plate, so that the anti-abrasion flow guide plate can be conveniently replaced when the anti-abrasion flow guide plate is abraded after being used for a long time, and normal use of the boiler is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of boiler water-cooled wall anti-wear, in particular to a CFB boiler water-cooled wall anti-wear device. Background Art

[0002] The biomass circulating fluidized bed boiler, abbreviated as CFB boiler, is an efficient and environmentally friendly boiler with high combustion efficiency, low emissions, and wide applicability to different fuels. The water-cooled wall is the main heating part of the boiler. It is composed of vertical steel pipes distributed around the boiler furnace. Long-term operation will cause the water-cooled wall tubes to become thinner due to wear, which will pose a serious safety hazard to boiler operation.

[0003] The existing patent document with the technical disclosure number CN209763025U discloses a boiler water-cooled wall anti-wear guide plate. This utility model is provided with a series of structures so that the device can play a role in treating the symptoms and the root cause of the wear of the boiler water-cooled wall pipes during use, and can completely avoid the non-stop phenomenon caused by water-cooled wall wear and leakage. The reinforced anti-wear guide plate can avoid the problem of falling off after long-term use and optimize the use process. However, during the use of the above-mentioned patent, since the anti-wear guide plate is welded to the boiler water-cooled wall through a welding block, when the anti-wear guide plate is worn after long-term use, it is inconvenient to replace it, which will affect the normal use of the boiler. Therefore, it is necessary to propose a CFB boiler water-cooled wall anti-wear device. Utility Model Content

[0004] The purpose of the utility model is to provide a CFB boiler water wall anti-wear device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a CFB boiler water-cooled wall anti-wear device, comprising a boiler body, a boiler outer wall being provided on the outside of the boiler body, a boiler water-cooled wall being provided on the inside of the boiler body, the boiler water-cooled wall being composed of a plurality of water-cooled wall tubes, fins being provided between adjacent water-cooled wall tubes, a plurality of brackets being vertically distributed on the surface of the boiler water-cooled wall, a plurality of mounting plates being provided on the front side of the brackets, a transverse guide plate being detachably installed between two adjacent mounting plates, and a vertical guide plate being detachably installed between the upper and lower mounting plates, the outer wall of the water-cooled wall tube being provided with a refractory layer, and the outer wall of the refractory layer being provided with an anti-wear layer.

[0006] Preferably, a first clamping strip is provided on both sides of the left and right sides of the mounting plate, a first clamping groove adapted to the first clamping strip is provided on both sides of the horizontal guide plate, and the horizontal guide plate and the first clamping strip are connected by a plurality of first bolts, a second clamping strip is installed on the upper and lower sides of the mounting plate, a second clamping groove adapted to the second clamping strip is provided on both sides of the vertical guide plate, and the vertical guide plate and the second clamping strip are connected by a plurality of second bolts.

[0007] Preferably, a plurality of welding blocks are provided between the bracket and the boiler water-cooled wall.

[0008] Preferably, the transverse guide plates and the vertical guide plates are both made of chromium-nickel alloy.

[0009] Preferably, the first bolt and the second bolt are both hexagon socket bolts.

[0010] Preferably, the refractory layer is cast from refractory concrete.

[0011] Preferably, the anti-wear layer is formed by spraying ceramic coating.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. In the utility model, horizontal guide plates and vertical guide plates made of chromium-nickel alloy are arranged on the boiler water-cooled wall to form an anti-wear grid layout, optimize the flow field on the boiler water-cooled wall surface, eliminate local eddies, turbulence and various vector airflows, reduce the cutting force and chiseling force of material particles on the water-cooled wall, and thus effectively control the wear problem of the boiler water-cooled wall.

[0014] 2. In the present invention, a detachable structure is formed between the horizontal guide plate and the mounting plate by the coordinated use of the first clamping strip, the first clamping groove and the first bolt. A detachable structure is formed between the vertical guide plate and the mounting plate by the coordinated use of the second clamping strip, the second clamping groove and the second bolt. Therefore, when the anti-wear guide plate is worn after long-term use, it is easy to replace it, thereby ensuring the normal use of the boiler. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the utility model;

[0016] Figure 2 for Figure 1 A in the middle is an enlarged structural diagram;

[0017] Figure 3 This is a schematic diagram of the water-cooled wall structure of the boiler of this utility model.

[0018] In the figure: 1. Boiler body; 2. Boiler water-cooled wall; 3. Fin; 4. Bracket; 5. Welding block; 6. Mounting plate; 7. Horizontal guide plate; 8. Vertical guide plate; 9. First clip; 10. First slot; 11. First bolt; 12. Second clip; 13. Second slot; 14. Second bolt; 15. Refractory layer; 16. Anti-wear layer. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] Example 1:

[0021] See also Figure 1 The biomass circulating fluidized bed boiler, referred to as the CFB boiler, is an efficient and environmentally friendly boiler with high combustion efficiency, low emissions, and wide applicability to different fuels. The utility model provides a technical solution: a CFB boiler water-cooled wall anti-wear device, comprising a boiler body 1, a boiler outer wall is provided on the outside of the boiler body 1, a boiler water-cooled wall 2 is provided on the inside of the boiler body 1, the boiler water-cooled wall 2 is composed of a plurality of water-cooled wall tubes, fins 3 are provided between adjacent water-cooled wall tubes, a plurality of brackets 4 are vertically distributed on the surface of the boiler water-cooled wall 2, and a plurality of welding blocks 5 are provided between the brackets 4 and the boiler water-cooled wall 2.

[0022] In this embodiment, please refer to Figure 1 A plurality of mounting plates 6 are provided on the front side of the bracket 4, and a transverse guide plate 7 is detachably installed between two adjacent mounting plates 6, and a vertical guide plate 8 is detachably installed between the upper and lower mounting plates 6. The transverse guide plates 7 and the vertical guide plates 8 are both made of chromium-nickel alloy. By arranging transverse guide plates 7 and vertical guide plates 8 made of chromium-nickel alloy on the boiler water-cooled wall 2, an anti-wear grid layout is formed, the surface flow field of the boiler water-cooled wall 2 is optimized, local eddies, turbulence and various vector airflows are eliminated, and the cutting force and chiseling force of material particles on the water-cooled wall are reduced, thereby effectively controlling the wear problem of the boiler water-cooled wall 2.

[0023] In this embodiment, please refer to Figure 1 and Figure 2The left and right sides of the mounting plate 6 are provided with a first clip 9, and both sides of the horizontal guide plate 7 are provided with a first clip groove 10 adapted to the first clip strip 9, and the horizontal guide plate 7 is connected to the first clip strip 9 by a plurality of first bolts 11. The upper and lower sides of the mounting plate 6 are provided with a second clip strip 12, and both sides of the vertical guide plate 8 are provided with a second clip groove 13 adapted to the second clip strip 12. The vertical guide plate 8 is connected to the second clip strip 12 by a plurality of second bolts 14, and the first bolt 11 and the second bolt 14 are both hexagonal bolts. Through the cooperation of the first clip strip 9, the first clip groove 10 and the first bolt 11, a detachable structure is formed between the horizontal guide plate 7 and the mounting plate 6. Through the cooperation of the second clip strip 12, the second clip groove 13 and the second bolt 14, a detachable structure is formed between the vertical guide plate 8 and the mounting plate 6, which can be conveniently replaced when the anti-wear guide plate is worn after long-term use, thereby ensuring the normal use of the boiler.

[0024] Example 2:

[0025] See also Figure 3 This embodiment differs from the first embodiment in that a refractory layer 15 is provided on the outer wall of the water-cooled wall tube. The refractory layer 15 is cast from refractory concrete. The main function of the refractory layer 15 is to protect the water-cooled wall tube from direct erosion by high-temperature flue gas, while also providing thermal insulation to reduce heat loss. The outer wall of the refractory layer 15 is provided with an anti-wear layer 16. The anti-wear layer 16 is sprayed with ceramic coating and has the characteristics of high hardness, wear resistance, and high temperature resistance. It can effectively reduce the wear and corrosion of the water-cooled wall tube and extend its service life.

[0026] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A CFB boiler water wall anti-wear device, characterized by: The invention comprises a boiler body (1), wherein the outer side of the boiler body (1) is provided with a boiler outer wall, and the inner side of the boiler body (1) is provided with a boiler water-cooled wall (2), wherein the boiler water-cooled wall (2) is composed of a plurality of water-cooled wall tubes, and fins (3) are provided between adjacent water-cooled wall tubes. A plurality of brackets (4) are vertically distributed on the surface of the boiler water-cooled wall (2), and a plurality of mounting plates (6) are provided on the front side of the brackets (4). A transverse guide plate (7) is detachably installed between two adjacent mounting plates (6), and a vertical guide plate (8) is detachably installed between the mounting plates (6) on the upper and lower sides. The outer wall of the water-cooled wall tube is provided with a refractory layer (15), and the outer wall of the refractory layer (15) is provided with an anti-wear layer (16).

2. The CFB boiler water wall anti-wear device according to claim 1, characterized in that: The left and right sides of the mounting plate (6) are both provided with first clamping strips (9), the two sides of the transverse guide plate (7) are both provided with first clamping grooves (10) adapted to the first clamping strips (9), the transverse guide plate (7) and the first clamping strips (9) are connected by a plurality of first bolts (11), the upper and lower sides of the mounting plate (6) are both provided with second clamping strips (12), the two sides of the vertical guide plate (8) are both provided with second clamping grooves (13) adapted to the second clamping strips (12), and the vertical guide plate (8) and the second clamping strips (12) are connected by a plurality of second bolts (14).

3. The CFB boiler water wall anti-wear device according to claim 1, characterized in that: A plurality of welding blocks (5) are provided between the bracket (4) and the boiler water-cooled wall (2).

4. The CFB boiler water wall anti-wear device according to claim 1, characterized in that: The transverse guide plates (7) and the vertical guide plates (8) are both made of chromium-nickel alloy.

5. The CFB boiler water wall anti-wear device according to claim 2, characterized in that: The first bolt (11) and the second bolt (14) are both hexagon socket bolts.

6. The CFB boiler water wall anti-wear device according to claim 1, characterized in that: The refractory layer (15) is cast from refractory concrete.

7. The CFB boiler water wall anti-wear device according to claim 1, characterized in that: The anti-wear layer (16) is formed by spraying ceramic paint.

Images