Sudoku structure compound anti-abrasion device of circulating fluidized bed boiler

Abstract

The invention discloses a sudoku structure compound anti-abrasion device of a circulating fluidized bed boiler, and belongs to the technical field of abrasion prevention of heating surfaces of circulating fluidized bed boilers. The technical problem to be solved is that the heating surface of the circulating fluidized bed boiler is abraded and is insufficient. According to the technical scheme, the sudoku structure compound anti-abrasion device of the circulating fluidized bed boiler comprises nine sudoku structures and four installation positioning holes, two pipe clamp structures and welding feet are symmetrically arranged on the four edges of the center sudoku structure, the sudoku structures can be planes or cambered surfaces, the angle range of the outer surface is 0-45 degrees, and the angle range of the inner surface is 0-45 degrees. Four positioning holes are formed in the center of the grid structure, the radius of each positioning hole ranges from 3 mm to 10 mm, the radius of the pipe clamp structure ranges from 16 mm to 35 mm, the width of the grid structure ranges from 5 mm to 120 mm, the number of the welding feet is one to two, and the grid structure, the mounting positioning holes, the pipe clamp structure and the welding feet are all integrally cast and formed by rare earth alloy heat-resistant steel.

Description

Technical Field

[0001] The invention discloses a nine-grid structure compound anti-wear device for a circulating fluidized bed boiler, belonging to the technical field of anti-wear for heating surfaces of circulating fluidized bed boilers. Background Art

[0002] As we all know, part of the heating surface of a circulating fluidized bed boiler is exposed to the flue gas flow of the boiler, and part is covered by refractory materials. In particular, the heating surfaces in the dense phase area of ​​the furnace, the cyclone separator, the middle and lower parts of the hanging screen, and around the furnace outlet are all covered by refractory materials. Although the parts covered by refractory materials can better protect the heating surface from wear, the thermal conductivity of the refractory material is very small, which greatly affects the heat absorption of the heating surface. Therefore, an anti-wear device that has both anti-wear effect and does not affect the heat absorption of the boiler heating surface is developed. This can greatly enhance the load capacity of the boiler, reduce the coal consumption of the power plant, and bring greater economic benefits to the power plant. Summary of the Invention

[0003] The present invention overcomes the shortcomings of the existing technology and aims to solve the technical problem of providing a device that can effectively alleviate the wear problem of the heating surface of a circulating fluidized bed boiler in the long term and release the existing refractory material-covered heating surface area in the dense phase area of ​​the circulating fluidized bed boiler furnace, the cyclone separator, the middle and lower part of the hanging screen, and around the furnace outlet, while taking into account both the wear protection of the heating surface and the increase in the heat absorption capacity of the heating surface.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a nine-grid structure compound anti-wear device for a circulating fluidized bed boiler, comprising nine grid structures and four installation positioning holes, two pipe clamp structures and welding feet are symmetrically arranged on the four sides of the central grid structure, the grid structure can be a plane or an arc surface, the outer surface angle range is 0~45°, four positioning holes are arranged in the center of the grid structure, the radius range of the positioning holes is 3mm~10mm, the radius range of the pipe clamp structure is 16mm~35mm, the width range of the grid structure is between 5mm-120mm, the number of welding feet is 1~2, the grid structure, installation positioning holes, pipe clamp structure and welding feet are all cast in one piece of rare earth alloy heat-resistant steel.

[0005] The grid structure can be a plane or a curved surface, and the angle of the outer surface ranges from 0 to 45 degrees.

[0006] Four positioning holes are provided at the center of the grid structure, and the radius of the positioning holes ranges from 3 mm to 10 mm.

[0007] The radius of the pipe clamp structure ranges from 16 mm to 35 mm.

[0008] The width of the grid structure ranges from 5 mm to 120 mm.

[0009] The arc radius of the pipe clamping groove ranges from 16 mm to 40 mm.

[0010] The number of the welding legs is 1 to 2.

[0011] The grid structure, installation positioning holes, pipe clamp structure and welding feet are all integrally cast from rare earth alloy heat-resistant steel.

[0012] Compared with the prior art, the present invention has the following beneficial effects.

[0013] 1. The surface of the grid structure in the present invention can be a plane structure or an arc structure, so it can be used for releasing the heating surface of water-cooled wall tube rows and can also be used for releasing the heating surface of cyclone separation.

[0014] 2. The tube clamp structure of the present invention makes the present invention fit well with the water-cooled wall tube row, which ensures the installation reliability of the present invention and transfers the heat absorbed by the present invention to the water-cooled wall tube row.

[0015] 3. The present invention adopts welding to fix, which is convenient for installation and maintenance.

[0016] 4. The width of the grid structure in the present invention can be flexibly adjusted according to the thickness of the refractory material, thereby ensuring the effectiveness of anti-wear.

[0017] 5. The nine-grid structure of the present invention can evenly reduce the speed of the ash flow adhering to the wall and guide it through the water-cooled wall fins, which is beneficial to increasing the contact time between the ash flow adhering to the wall and the heating surface while preventing wear, thereby increasing the convective heat transfer efficiency.

[0018] 6. The welding legs in the present invention are independent and have welding stress release grooves in the middle, which ensures four-point welding while releasing welding stress, thereby ensuring the installation quality of the present invention.

[0019] 7. Protecting the heating surface of the furnace partially covered with refractory materials with the present invention can enhance the heat absorption capacity of the boiler, and has the additional benefits of lowering the bed temperature, being conducive to meeting environmental protection standards and reducing coal consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described in detail below with reference to the accompanying drawings.

[0021] Figure 1 It is a perspective view of the present invention.

[0022] Figure 2 It is a front view of the present invention.

[0023] Figure 3 It is a rear view of the present invention.

[0024] Figure 4 for Figure 2 Left view of .

[0025] Figure 5 for Figure 2 Top view of .

[0026] Figure 6 Reference for the use of this invention Figure 1 .

[0027] In the figure: 1. Grid structure; 2. Installation positioning holes; 3. Pipe clamp structure; 4. Welding feet. DETAILED DESCRIPTION

[0028] like Figure 1-5 The present invention comprises nine grid structures (1) and four installation positioning holes (2), and two pipe clamp structures (3) and welding feet (4) are symmetrically arranged on the four sides of the central grid structure (1).

[0029] The grid structure (1) can be a plane or a curved surface, and the angle of the outer surface ranges from 0 to 45 degrees.

[0030] Four positioning holes (2) are provided at the center of the grid structure (1), and the radius of the positioning holes (2) ranges from 3 mm to 10 mm.

[0031] The radius of the pipe clamp structure (3) is in the range of 16 mm to 35 mm.

[0032] The width of the grid structure (1) ranges from 5 mm to 120 mm.

[0033] The number of the welding legs (4) is 1 to 2.

[0034] The grid structure (1), the installation positioning holes (2), the pipe clamp structure (3) and the welding feet (4) are all integrally cast from rare earth alloy heat-resistant steel.

[0035] Construction plan: Figure 6 As shown, the structural dimensions of the present invention are first determined based on the structural dimensions of the circulating fluidized bed boiler heating surface tube bank, the wear conditions of different parts, and relevant operating parameters. For worn heating surface tube banks without refractory material on the surface, the present invention can be directly installed in close contact with the heating surface tube bank, using fixed blocks for welding to tightly fit the heating surface. If the heating surface is covered with refractory material, the existing refractory furnace wall is first removed and the anchors are cleaned. The anchors of the present invention are then welded to the water-cooled wall fins. The present invention is evenly arranged on the heating surface and secured by welding to the anchors, leaving a sufficient expansion gap between the present invention and the anchors. This ultimately forms a comprehensive anti-wear protection system for the heating surface of the circulating fluidized bed boiler.

Claims

1. The nine-grid structure compound anti-wear device for circulating fluidized bed boiler is characterized by: It comprises nine grid structures (1) and four installation positioning holes (2), and two pipe clamp structures (3) and welding feet (4) are symmetrically arranged on the four sides of the central grid structure (1).

2. The nine-grid structure compound anti-wear device for a circulating fluidized bed boiler according to claim 1, characterized in that: The grid structure (1) can be a plane or a curved surface, and the angle of the outer surface ranges from 0 to 45 degrees.

3. The nine-grid structure compound anti-wear device for a circulating fluidized bed boiler according to claim 1, characterized in that: Four positioning holes (2) are provided at the center of the grid structure (1), and the radius of the positioning holes (2) ranges from 3 mm to 10 mm.

4. The nine-grid structure compound anti-wear device for a circulating fluidized bed boiler according to claim 1, characterized in that: The radius of the pipe clamp structure (3) is in the range of 16 mm to 35 mm.

5. The nine-grid structure compound anti-wear device for a circulating fluidized bed boiler according to claim 1, characterized in that: The width of the grid structure (1) ranges from 5 mm to 120 mm.

6. The nine-grid structure compound anti-wear device for a circulating fluidized bed boiler according to claim 1, characterized in that: The number of the welding legs (4) is 1 to 2.

7. The nine-grid structure compound anti-wear device for a circulating fluidized bed boiler according to claim 1, characterized in that: The grid structure (1), the installation positioning holes (2), the pipe clamp structure (3) and the welding feet (4) are all integrally cast from rare earth alloy heat-resistant steel.

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