Honeycomb structure compound anti-abrasion block for heating surface of circulating fluidized bed boiler
By installing honeycomb structure duplex anti-wear blocks on the heated surface of the circulating fluidized bed boiler, the problems of wear and insufficient heat absorption capacity of the heated surface are solved, and higher load capacity and lower coal consumption are achieved.
Patent Information
- Application Number
- CN202323374212.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-06
- Publication Date
- 2025-03-04
- Estimated Expiration
- 2033-12-06
AI Technical Summary
The heated surface of the existing circulating fluidized bed boiler is easily worn in the flue gas flow, and the parts covered by refractory materials have poor thermal conductivity, which affects the heat absorption.
The honeycomb structure duplex anti-wear block is adopted, including outer ribs, inner ribs and semicircular duct grooves, which are fixed on the heated surface by welding to form an anti-wear device formed by the integrated casting of rare earth alloy heat-resistant steel.
Effectively reduce wear on the heated surface, improve heat absorption capacity, enhance the load capacity of the boiler, reduce coal consumption, and have good deformation resistance and long-term usage performance.
Smart Images
Figure CN222560010U_ABST
Abstract
Description
Technical Field
[0001] The utility model discloses a honeycomb structure compound anti-wear block for the heating surface of a circulating fluidized bed boiler, belonging to the technical field of anti-wear for the heating surface of a circulating fluidized bed boiler. Background Art
[0002] As we all know, part of the heating surface of a 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 in the dense phase area of the furnace, 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 materials is very small, which greatly affects the heat absorption of the heating surface. Therefore, an anti-wear device is developed that has both anti-wear effect and does not affect the heat absorption of the boiler heating surface, 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 deficiencies of the prior art and aims to solve the technical problem of providing an anti-wear device that can effectively alleviate the wear problem of the heating surface of a circulating fluidized bed boiler for a long time and can release the heating surface covered by the existing refractory material.
[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a honeycomb structure compound anti-wear block for the heating surface of a circulating fluidized bed boiler, including outer ribs and inner ribs, 18 outer ribs form a polygonal peripheral structure, and 12 inner ribs evenly divide the polyhedral peripheral structure composed of the outer ribs into seven regular hexagons, and at the same time, three rows of longitudinal pipe clamping grooves are arranged in parallel on the outer ribs and the inner ribs, and the pipe clamping grooves are semicircular.
[0005] The included angle between the outer rib and the inner rib is 120°.
[0006] The included angle between the outer ribs is 120°.
[0007] The included angle between the inner ribs is 120°.
[0008] The width of the outer ribs and the inner ribs is between 5mm and 100mm.
[0009] The arc radius of the pipe clamping groove ranges from 16 mm to 40 mm.
[0010] The outer ribs, inner ribs and pipe clamping grooves are all integrally cast from rare earth alloy heat-resistant steel.
[0011] Compared with the prior art, the utility model has the following beneficial effects.
[0012] 1. The outer ribs and the inner ribs of the utility model have a comprehensive effect on the heating surface of the furnace of the circulating fluidized bed boiler, which can reduce the wear of the heating surface and does not affect the heat absorption of the heating surface.
[0013] 2. In the utility model, the outer ribs and the inner ribs support each other to form a honeycomb structure, which has good anti-deformation ability and is conducive to the long-term use of the utility model.
[0014] 3. The utility model is fixed by welding, which is convenient for installation and maintenance.
[0015] 4. The pipe clamping groove in the utility model can fit tightly with the water-cooled wall tube, and can transfer the heat absorbed by the utility model to the heating surface.
[0016] 5. The regular hexagon formed by the inner ribs and the outer ribs of the utility model can evenly reduce the speed and guide the wall flow, which is beneficial to increase the contact time between the wall ash flow and the heating surface while preventing wear, thereby increasing the convective heat transfer efficiency.
[0017] 6. The utility model is used to protect the heating surface covered with refractory materials in the furnace, which can enhance the heat absorption capacity of the boiler, and has the additional benefits of reducing the bed temperature, being conducive to meeting environmental protection standards, and reducing coal consumption. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The utility model is further described in detail below in conjunction with the accompanying drawings.
[0019] Figure 1 It is a three-dimensional diagram of the utility model.
[0020] Figure 2 It is a front view of the utility model.
[0021] Figure 3 It is a rear view of the utility model.
[0022] Figure 4 for Figure 2 Left view of .
[0023] Figure 5 for Figure 2 Top view of the .
[0024] Figure 6 For reference of the use status of this utility model Figure 1 .
[0025] Figure 7 For reference of the use status of this utility model Figure 2 .
[0026] In the figure: 1. outer rib plate; 2. inner rib plate; 3. pipe clamping groove. DETAILED DESCRIPTION
[0027] like Figure 1-5 The utility model comprises an outer rib plate (1) and an inner rib plate (2), wherein 18 outer rib plates (1) form a polygonal peripheral structure, and 12 inner rib plates (2) evenly divide the polygonal peripheral structure formed by the outer rib plates (1) into seven regular hexagons, and three rows of longitudinal pipe clamping grooves (3) are arranged in parallel on the outer rib plates (1) and the inner rib plates (2), and the pipe clamping grooves (3) are semicircular.
[0028] The included angle between the outer rib (1) and the inner rib (2) is 120°.
[0029] The included angle between the outer ribs (1) is 120°.
[0030] The included angle between the inner ribs (2) is 120°.
[0031] The width of the outer ribs (1) and the inner ribs (2) is between 5 mm and 100 mm.
[0032] The arc radius of the pipe clamping groove (3) is in the range of 16 mm to 40 mm.
[0033] The outer rib plate (1), the inner rib plate (2) and the pipe clamping groove (3) are all formed by integral casting of rare earth alloy heat-resistant steel.
[0034] Construction plan: Figure 6 , 7 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 honeycomb structure compound anti-wear block for the heating surface of a circulating fluidized bed boiler is characterized by: The invention comprises an outer rib plate (1) and an inner rib plate (2), wherein 18 outer rib plates (1) form a polygonal outer structure, and 12 inner rib plates (2) evenly divide the polygonal outer structure formed by the outer rib plates (1) into seven regular hexagons. Meanwhile, three rows of longitudinal pipe clamping grooves (3) are arranged in parallel on the outer rib plates (1) and the inner rib plates (2), and the pipe clamping grooves (3) are semicircular.
2. The circulating fluidized bed boiler heating surface honeycomb structure compound anti-wear block according to claim 1, characterized in that: The included angle between the outer rib (1) and the inner rib (2) is 120°.
3. The circulating fluidized bed boiler heating surface honeycomb structure compound anti-wear block according to claim 1, characterized in that: The included angle between the outer ribs (1) is 120°.
4. The circulating fluidized bed boiler heating surface honeycomb structure compound anti-wear block according to claim 1, characterized in that: The included angle between the inner ribs (2) is 120°.
5. The circulating fluidized bed boiler heating surface honeycomb structure compound anti-wear block according to claim 1, characterized in that: The width of the outer rib (1) and the inner rib (2) is between 5 mm and 100 mm.
6. The circulating fluidized bed boiler heating surface honeycomb structure compound anti-wear block according to claim 1, characterized in that: The arc radius of the pipe clamping groove (3) is in the range of 16 mm to 40 mm.
7. The circulating fluidized bed boiler heating surface honeycomb structure compound anti-wear block according to claim 1, characterized in that: The outer rib plate (1), the inner rib plate (2) and the pipe clamping groove (3) are all formed by integral casting of rare earth alloy heat-resistant steel.