Sudoku structure compound anti-abrasion device of circulating fluidized bed boiler
The nine-grid structure anti-wear device addresses the balance of wear protection and heat absorption in circulating fluidized bed boilers by using adjustable rare earth steel components to improve thermal efficiency and reduce coal use.
Patent Information
- Application Number
- CN202420539879.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-10
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-03-10
AI Technical Summary
Existing anti-wear devices for circulating fluidized bed boilers fail to balance wear protection with heat absorption, leading to reduced thermal conductivity and increased coal consumption.
A nine-grid structure compound anti-wear device made of rare earth alloy heat-resistant steel, featuring adjustable grid structures and pipe clamps, which can be plane or arc-shaped, to fit various boiler components and enhance heat transfer.
Enhances wear protection and heat absorption, reduces coal consumption, and meets environmental standards by evenly guiding ash flow and increasing convective heat transfer efficiency.
Smart Images
Figure CN222164775U_ABST
Abstract
Description
Technical Field
[0001] The utility model discloses a nine-square structure compound anti-wear device for a circulating fluidized bed boiler, belonging to the technical field of anti-wear of a heating surface of a circulating fluidized bed boiler. Background Art
[0002] As we all know, part of the heating surface of the circulating fluidized bed boiler is exposed in the flue gas flow of the boiler, and part is covered by refractory materials, especially the heating surfaces of 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, which can greatly enhance the load capacity of the boiler, reduce the coal consumption of power generation in the power plant, and bring greater economic benefits to the power plant. Utility Model Content
[0003] The utility model overcomes the shortcomings of the prior art 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 can release the heating surface area covered by existing refractory materials in the dense phase area of the furnace of the circulating fluidized bed boiler, the middle and lower part of the cyclone separator, the hanging screen, and the surrounding area of the furnace outlet, while taking into account both the wear protection of the heating surface and the increase of the heat absorption capacity of the heating surface.
[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a nine-grid structure compound anti-wear device for a circulating fluidized bed boiler, including 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 to 45°, four positioning holes are arranged in the center of the grid structure, the radius range of the positioning holes is 3mm to 10mm, the radius range of the pipe clamp structure is 16mm to 35mm, the width range of the grid structure is between 5mm-120mm, the number of welding feet is 1 to 2, and 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 range of the outer surface is 0 to 45 degrees.
[0006] Four positioning holes are arranged at the center of the grid structure, and the radius range of the positioning holes is 3mm to 10mm.
[0007] The radius of the pipe clamp structure ranges from 16 mm to 35 mm.
[0008] The width of the lattice 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 utility model has the following beneficial effects.
[0013] 1. The surface of the lattice structure in the utility model can be a plane structure or an arc structure, so it can be used for releasing the heating surface of the water-cooled wall tube row and can also be used for releasing the heating surface of the cyclone separation.
[0014] 2. The tube clamp structure in the utility model enables the utility model to fit well with the water-cooled wall tube row, which ensures the installation reliability of the utility model and can also transfer the heat absorbed by the utility model to the water-cooled wall tube row.
[0015] 3. The utility model is fixed by welding, which is convenient for installation and maintenance.
[0016] 4. The width of the grid structure in the utility model 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 utility model 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 increase 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 feet in the utility model are independent and have welding stress release grooves in the middle, which can ensure four-point welding and release welding stress, thereby ensuring the installation quality of the utility model.
[0019] 7. The utility model is used to protect the heating surface covered by the refractory material in the furnace, which can enhance the heat absorption capacity of the boiler, reduce the bed temperature, help meet environmental protection standards and reduce coal consumption. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] The utility model is further described in detail below in conjunction with the accompanying drawings.
[0021] Figure 1 It is a three-dimensional diagram of the utility model.
[0022] Figure 2 It is a front view of the utility model.
[0023] Figure 3 It is a rear view of the utility model.
[0024] Figure 4 for Figure 2 Left view of .
[0025] Figure 5 for Figure 2 Top view of the .
[0026] Figure 6 For reference of the use status of this utility model 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 utility model 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 arranged at the center of the grid structure (1), and the radius of the positioning holes (2) is in the range of 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 lattice structure (1) is in the range of 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, firstly, the structural dimensions of the utility model are determined according to the structural dimensions of the heating surface tube row of the circulating fluidized bed boiler, the wear conditions of different parts and the relevant operating parameters. For the worn heating surface tube row, if there is no refractory material on the surface, the utility model can be directly installed in a fit with the heating surface tube row, and the fixed block is welded to the heating surface to be tightly fitted and installed. If the heating surface is covered with refractory material, the original refractory furnace wall is first dismantled and the anchor is cleaned, and the anchor of the utility model is welded on the water-cooled wall fin, and the utility model is evenly arranged on the surface of the heating surface, and the utility model is welded and fixed with the anchor, and an expansion gap is left between the utility model, and finally an overall anti-wear protection system for the heating surface of the circulating fluidized bed boiler is formed.
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 four sides of the central grid structure (1).
2. The nine-grid structure compound anti-wear device for circulating fluidized bed boiler according to claim 1 is 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°.
3. The nine-grid structure compound anti-wear device for circulating fluidized bed boiler according to claim 1 is characterized by: Four positioning holes (2) are arranged at the center of the grid structure (1), and the radius of the positioning holes (2) is in the range of 3 mm to 10 mm.
4. The nine-grid structure compound anti-wear device for circulating fluidized bed boiler according to claim 1 is 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 circulating fluidized bed boiler according to claim 1 is characterized by: The width of the lattice structure (1) is in the range of 5 mm to 120 mm.
6. The nine-grid structure compound anti-wear device for circulating fluidized bed boiler according to claim 1 is characterized by: The number of the welding legs (4) is 1 to 2.
7. The nine-grid structure compound anti-wear device for circulating fluidized bed boiler according to claim 1 is characterized by: 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.