Dry slag tap boiler slag well and construction method thereof

Abstract

The application discloses a dry-type slag discharge boiler slag well and a construction method thereof. The dry-type slag discharge boiler slag well comprises a slag well body, a refractory layer arranged on the inner wall of the slag well body, a plurality of anchoring members, a plurality of reinforcing frameworks and a plurality of reinforcing steel plates, wherein the anchoring members, the reinforcing frameworks and the reinforcing steel plates are located in the refractory layer. The dry-type slag discharge boiler slag well and the construction method thereof can realize various anchoring effects on the refractory layer by arranging the anchoring members, the reinforcing frameworks and the reinforcing steel plates on the inner wall of the slag well, effectively improve the adhesion and reliability of the refractory layer, overcome the cracking and breaking of the refractory layer caused by insufficient anchoring measures in the prior art, effectively prolong the service life of the dry-type slag discharge boiler slag well, reduce the repair frequency of the slag well, improve the operation safety of the boiler, and realize long-period safe and stable use of the dry-type slag discharge boiler slag well in a coal-fired power plant.

Description

Technical Field

[0001] This application generally relates to the field of power generation equipment technology, and in particular to dry ash discharge boiler ash wells and their construction methods. Background Technology

[0002] The slag heap of a dry ash-discharge boiler in a coal-fired power plant is a crucial structure for ensuring the safe and stable operation of the boiler. The refractory lining of the slag heap must possess high-temperature resistance, wear resistance, and thermal shock resistance. The refractory castable for boiler slag heaps is typically designed and supplied by dry ash removal equipment manufacturers, resulting in inconsistent standards for slag heap lining design and construction. Surveys have revealed that the refractory casting of some dry ash-discharge boilers in coal-fired power plants has been affected by multiple factors, including improper refractory selection, unreasonable design and installation of fixing nails, leading to refractory breakage and delamination within a short period after unit commissioning. In some cases, large-scale detachment has necessitated boiler shutdown, causing unplanned unit outages and severely impacting boiler safety and power plant economic efficiency. Summary of the Invention

[0003] This application addresses the technical problem described in the background art where the unreliable structure of the slag well in a dry ash-discharging boiler affects the safe operation of the boiler and the economic benefits of the power plant. It provides a dry ash-discharging boiler slag well and its construction method.

[0004] In a first aspect, embodiments of this application / disclosure provide a dry ash discharge boiler ash well, comprising: Slag well body; A refractory layer is installed on the inner wall of the slag well body; Multiple anchoring components, which are curved, are fixed at both ends to the inner wall of the slag well. All anchoring components are evenly distributed on the inner wall of the slag well. Multiple reinforcing frames are arranged in a grid pattern and are anchored to the inner wall of the slag well by anchoring components. Multiple reinforcing steel plates are arranged in a grid pattern and fixed to the inner wall of the slag well. The anchoring components, reinforcing frame, and reinforcing steel plate are all located within the fire-resistant layer.

[0005] In one embodiment of the first aspect, the anchoring member includes a first anchor with a length direction in a first direction and a second anchor with a length direction in a second direction, the first direction and the second direction having an included angle.

[0006] In one embodiment of the first aspect, all anchoring members are distributed in multiple rows, and in the same row, the first anchor and the second anchor are spaced apart, and the anchoring members in adjacent rows are staggered.

[0007] In one embodiment of the first aspect, the spacing between two adjacent first anchors ranges from 180 mm to 220 mm; and / or, the spacing between two adjacent second anchors ranges from 180 mm to 220 mm.

[0008] In one embodiment of the first aspect, the anchoring member is Ω-shaped; and / or, the distance between the two ends of the anchoring member is 70% to 90% of the thickness of the refractory layer; and / or, a weld leg is formed at the connection between the end of the anchoring member and the inner wall of the slag well body, the length of the weld leg being not less than 20 mm; and / or, the difference between the thickness of the refractory layer and the maximum dimension from the anchoring member to the inner wall of the slag well is greater than or equal to 30 mm.

[0009] In one embodiment of the first aspect, the reinforcing frame is tied to the anchoring member.

[0010] In one embodiment of the first aspect, the grid shape formed by the reinforcing steel plate has at least two first profiles extending along the length direction and a second profile extending along the width direction, the spacing between two adjacent first profiles being in the range of 600 mm to 1200 mm; and / or, the spacing between two adjacent second profiles being in the range of 600 mm to 1200 mm.

[0011] In one embodiment of the first aspect, the grid shape includes at least two first profiles extending along the length direction and a second profile extending along the width direction. An expansion joint is provided between two adjacent reinforcing steel plates in the same first profile or the same second profile, and the size of the expansion joint ranges from 2 mm to 5 mm.

[0012] In one embodiment of the first aspect, the width of the reinforcing steel plate ranges from 40 mm to 80 mm; and / or, the thickness of the reinforcing steel plate ranges from 8 mm to 15 mm; and / or, the material of the reinforcing steel plate is Q235B.

[0013] In one embodiment of the first aspect, the refractory layer is made of bauxite clinker.

[0014] In one embodiment of the first aspect, the slag well body includes a slag hopper, a vertical section and an inclined section, wherein a reinforcing frame is provided on the slag hopper and / or the vertical section, and a reinforcing steel plate is provided on the inclined section.

[0015] In a second aspect, embodiments of this application provide a construction method for a dry ash discharge boiler ash well, comprising: Step S1: Weld anchoring components and reinforcing steel plates onto the inner wall of the slag well; Step S2: Tie a reinforcing frame to the anchoring component; Step S3: Arrange the casting template and use castable refractory to cast the refractory layer.

[0016] In one embodiment of the second aspect, step S1 further includes: The anchoring component is bent into an "Ω" shape, and both ends of the anchoring component are welded to the inner wall of the slag well.

[0017] In one embodiment of the second aspect, a weld leg is formed at the connection between the anchoring member and the inner wall of the slag well, and the length of the weld leg is greater than or equal to 20 mm.

[0018] The dry ash discharge boiler ash well and its construction method provided in this application, by setting anchoring components, reinforcing frames and reinforcing steel plates on the inner wall of the ash well, can achieve multiple anchoring effects on the refractory layer, effectively improving the adhesion and reliability of the refractory layer, overcoming the problem of refractory layer cracking and fracture caused by insufficient anchoring measures in the prior art, effectively improving the service life of the dry ash discharge boiler ash well, reducing the repair frequency of the ash well, improving the operating safety of the boiler, and realizing the long-term safe and stable use of the dry ash discharge boiler ash well in coal-fired power plants. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a dry ash discharge boiler ash well provided in an embodiment of this application; Figure 2 A schematic diagram showing the distribution of anchoring components in a dry ash discharge boiler ash well provided in an embodiment of this application; Figure 3 A schematic diagram showing the distribution of the reinforcing frame of the slag well of a dry slag discharge boiler provided in an embodiment of this application; Figure 4 A schematic diagram showing the distribution of reinforcing steel plates in the slag well of a dry slag discharge boiler provided in an embodiment of this application; Figure 5 for Figure 4 A partial schematic diagram of point A; Explanation of reference numerals in the attached figures: 1. Slag well body; 2. Refractory layer; 3. Anchoring components; 4. Reinforcing frame; 5. Reinforcing steel plate Detailed Implementation The present application / disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application / disclosure and are not intended to limit the scope of the present application / disclosure. Furthermore, it should be noted that, for ease of description, only the parts relevant to the present application / disclosure are shown in the accompanying drawings, not the entire structure.

[0020] The slag heap of a dry ash-discharge boiler in a coal-fired power plant is a crucial structure for ensuring the safe and stable operation of the boiler. The refractory lining of the slag heap must possess high-temperature resistance, wear resistance, and thermal shock resistance. The refractory castable for boiler slag heaps is typically designed and supplied by dry ash removal equipment manufacturers, resulting in inconsistent standards for slag heap lining design and construction. Surveys have revealed that the refractory casting of some dry ash-discharge boilers in coal-fired power plants has been affected by multiple factors, including improper refractory selection, unreasonable design and installation of fixing nails, leading to refractory breakage and delamination within a short period after unit commissioning. In some cases, large-scale detachment has necessitated boiler shutdown, causing unplanned unit outages and severely impacting boiler safety and power plant economic efficiency.

[0021] If damage to the slag well's lining layer causes an unplanned shutdown of the generating unit, the repair period will be at least 5 working days. Taking a 660MW unit (in Yulin, Shaanxi Province) as an example, based on 65% of the unit's full load output and a market electricity price of 0.294 yuan / kWh, the daily electricity loss per unit due to unplanned shutdown caused by slag well repair would be approximately: 660MW × 65% × 1000 × 0.294 × 24 hours ≈ 3.02 million yuan, and the loss over 5 working days would be approximately 15.1 million yuan.

[0022] Therefore, this application provides a method such as Figures 1 to 5 The dry ash discharge boiler ash well shown includes: ash well body 1; refractory layer 2, which is set on the inner wall of ash well body 1; multiple anchoring members 3, which are curved and both ends of which are fixed to the inner wall of ash well, and all anchoring members 3 are evenly distributed on the inner wall of ash well; multiple reinforcing frames 4, which are distributed in a grid shape and are set on the inner wall of ash well through anchoring members 3; and multiple reinforcing steel plates 5, which are distributed in a grid shape and are fixed to the inner wall of ash well; the anchoring members 3, reinforcing frames 4 and reinforcing steel plates 5 are all located within the refractory layer 2. By setting anchoring components 3, reinforcing frames 4, and reinforcing steel plates 5 on the inner wall of the slag well, various anchoring effects can be achieved for the refractory layer 2, effectively improving the adhesion and reliability of the refractory layer 2. This overcomes the problem of cracking and breakage of the refractory layer 2 caused by insufficient anchoring measures in the existing technology, effectively improving the service life of the slag well of the dry slag discharge boiler, reducing the repair frequency of the slag well, improving the operating safety of the boiler, and realizing the long-term safe and stable use of the slag well of the dry slag discharge boiler in the coal-fired power plant.

[0023] The curved shape of the anchoring member 3 allows for a reliable connection between its end and the slag well body 1, while a portion of the anchoring member 3 extends into the middle layer of the refractory layer 2. This effectively forms a reinforcing structure within the refractory layer 2, reliably tightening it to the inner wall of the slag well and constituting the first-level structure that increases the adhesion of the refractory layer 2. A reinforcing frame 4 is installed on the portion of the anchoring member 3 furthest from the slag well body 1, effectively creating a mesh-like reinforcing layer at a certain distance. Supported by the anchoring member 3, the reinforcing frame 4 can be positioned in the middle layer of the refractory layer 2, effectively increasing the overall structural strength of the refractory layer 2. It also works in conjunction with the anchoring member 3 to further enhance the adhesion of the refractory layer 2. Adhesion, this constitutes the second-level structure for increasing the adhesion of the refractory layer 2; further reinforcing steel plates 5 are set on the inner wall of the slag well body 1, using the reinforcing steel plates 5 to increase the interfacial interlocking force of the inner wall of the slag well body 1 and the structural strength of the slag well body 1, which can also increase the adhesion between the refractory layer 2 and the slag well body 1, this constitutes the third-level structure for increasing the adhesion of the refractory layer 2; using the three-level structure to fix the refractory layer 2, effectively improves the adhesion and reliability of the refractory layer 2, overcomes the problem of cracking and fracture of the refractory layer 2 caused by insufficient anchoring measures in the existing technology, effectively improves the service life of the slag well of the dry slag discharge boiler, reduces the repair frequency of the slag well, and improves the operating safety of the boiler.

[0024] Furthermore, the anchoring member 3 includes a first anchor with its length direction in a first direction and a second anchor with its length direction in a second direction, the first direction and the second direction having an included angle. By setting the anchoring member 3 in different directions, the anchoring member 3 can achieve tension on the fire-resistant layer 2 in different directions, effectively improving the adhesion of the fire-resistant layer 2, and also using different directions to avoid stress concentration in the fire-resistant layer 2, further enhancing the adhesion of the fire-resistant layer 2. The included angle ranges from 45° to 135°, preferably 90°. That is, when the length direction of the first anchor is vertical, the length direction of the second anchor is horizontal.

[0025] Optionally, all anchoring members 3 are distributed in multiple rows, and in the same row, the first anchor and the second anchor are set at intervals, and the anchoring members 3 in adjacent rows are staggered, which effectively increases the degree of alternation between the first anchor and the second anchor, thereby improving the stress dispersion effect on the fire-resistant layer 2 and improving the structural reliability of the fire-resistant layer 2.

[0026] In one implementation, the spacing L1 between two adjacent first anchors ranges from 180mm to 220mm, preferably 200mm. Within this spacing range, the uniformity of the grid formed by the arrangement of the first anchors can be ensured; when the spacing is too large, too much refractory 2 will be added within the spacing, affecting the adhesion of the refractory layer 2; when the spacing is too small, the refractory 2 will not be filled densely within the spacing, affecting the structural strength of the refractory layer 2.

[0027] Similarly, the spacing L2 between two adjacent second anchors ranges from 180mm to 220mm, preferably 200mm. Within this spacing range, the uniformity of the grid formed by the arrangement of the first anchors can be ensured; when the spacing is too large, too much refractory 2 will be added within the spacing, affecting the adhesion of the refractory layer 2; when the spacing is too small, the refractory 2 will not be filled densely within the spacing, affecting the structural strength of the refractory layer 2.

[0028] like Figure 1 and Figure 2 As shown, the anchoring member 3 is shaped like an "Ω". By setting the anchoring member 3 to an "Ω" shape, the anchoring member 3 can have a larger contact area and mechanical interlocking force, and can also distribute the stress of the fire-resistant layer 2 evenly, reducing the problem of internal cracks in the fire-resistant layer 2 and improving the structural reliability of the fire-resistant layer 2.

[0029] The distance between the two ends of the anchoring member 3 is 70% to 90% of the thickness of the fire-resistant layer 2, preferably 80%. By limiting the length of the anchoring member 3 and combining it with the "Ω" shape of the anchoring member 3, the depth of the anchoring member 3 extending into the fire-resistant layer 2 can be limited. This ensures both the structural strength of the anchoring member 3 and the tension of the anchoring member 3 on the fire-resistant layer 2, and also avoids the anchoring member 3 being too large, which would affect the structural reliability of the fire-resistant layer 2.

[0030] Alternatively, the difference between the thickness of the refractory layer 2 and the maximum dimension of the anchoring member 3 to the inner wall of the slag well is greater than or equal to 30mm. In other words, the anchoring member 3 cannot protrude from the refractory layer 2, which can ensure the structural strength of the anchoring member 3 and the tension of the anchoring member 3 on the refractory layer 2. It can also avoid the anchoring member 3 being too large and affecting the structural reliability of the refractory layer 2.

[0031] A weld leg is formed at the connection between the end of the anchoring component 3 and the inner wall of the slag well body 1. The length of the weld leg is not less than 20mm. By forming a weld leg of not less than 20mm, the connection reliability between the anchoring component 3 and the slag well body 1 can be effectively improved. The weld leg should be fully welded to the slag well body 1 using heat-resistant steel welding rods.

[0032] The reinforcing frame 4 is tied to the anchoring component 3. By tying the reinforcing frame 4, the problem of deformation and displacement of the reinforcing frame 4 can be avoided when pouring refractory material during the pouring of the refractory layer 2, thus ensuring the reinforcing frame 4's effect on improving the structural strength of the refractory layer 2.

[0033] As another embodiment, the grid shape formed by the reinforcing steel plate 5 has at least two first profile lines extending along the length direction and a second profile line extending along the width direction. The spacing L3 between two adjacent first profile lines ranges from 600mm to 1200mm, preferably 1000mm. This ensures that the reinforcing steel plate 5 strengthens the structure of the slag well body 1 and the interfacial bonding force of the inner wall of the slag well body 1. It also avoids that too many reinforcing steel plates 5 will affect the bonding effect between the refractory layer 2 and the inner wall of the slag well body 1, thereby improving the structural reliability of the refractory layer 2.

[0034] The spacing L4 between two adjacent second-type lines ranges from 600 to 1200 mm, preferably 800 mm. This ensures the structural reinforcement of the slag well body 1 by the reinforcing steel plate 5 and the interfacial bonding force of the inner wall of the slag well body 1. It also avoids the excessive number of reinforcing steel plates 5 from affecting the bonding effect between the refractory layer 2 and the inner wall of the slag well body 1, thereby improving the structural reliability of the refractory layer 2.

[0035] The grid shape formed by the reinforcing steel plates 5 has at least two first profile lines extending along the length direction and a second profile line extending along the width direction. An expansion joint is provided between two adjacent reinforcing steel plates 5 within the same first profile line or the same second profile line. The size L5 of the expansion joint ranges from 2mm to 5mm, preferably 3mm. By providing the expansion joint, the problem of interference caused by the expansion of the reinforcing steel plates 5 due to temperature changes during the heating process of the refractory layer 2 is avoided, ensuring the structural reliability of both the reinforcing steel plates 5 and the refractory layer 2.

[0036] As one implementation method, the width of the reinforcing steel plate 5 is in the range of 40mm to 80mm. Preferably, the width of the reinforcing steel plate 5 is 60mm. When the width is too large, it will affect the bonding effect between the refractory layer 2 and the inner wall of the slag well body 1, reducing the structural reliability of the refractory layer 2. When the width is too small, the reinforcing steel plate 5 cannot increase the structural strength and improve the interfacial bonding force, which will also reduce the structural reliability.

[0037] The thickness of the reinforcing steel plate 5 ranges from 8mm to 15mm. Preferably, the thickness of the reinforcing steel plate 5 is 10mm. When the thickness is too large, it will affect the bonding effect between the refractory layer 2 and the inner wall of the slag well body 1, reducing the structural reliability of the refractory layer 2. When the thickness is too small, the reinforcing steel plate 5 cannot increase the structural strength and improve the interfacial bonding force, which will also reduce the structural reliability.

[0038] The material of the reinforcing steel plate 5 is Q235B. Q235B is a carbon structural steel with a yield strength ≥235MPa, tensile strength 370-500MPa, and elongation after fracture ≥26% when the thickness is ≤16mm, effectively ensuring the reinforcing effect of the reinforcing steel plate 5 on the structural strength of the slag well body 1.

[0039] Refractory castables are mainly composed of clay, high-alumina, silicon carbide, or corundum. To reduce costs, most manufacturers choose to supply the cheaper clay-based refractory castables unless the purchaser has specific requirements. Since refractory castables account for a small percentage of the price of dry slag machine equipment, dry slag machine manufacturers usually supply the site with the lower-priced castables unless the purchaser has specific requirements. Equipment manufacturers generally lack in-depth research on the characteristics of coal used in coal-fired power plants, especially regarding measures to prevent slagging and coking. When using conventional designs, large pieces of coke falling can easily cause cracking and fracture of the slag well casting layer, significantly shortening its service life. Due to multiple factors such as improper castable selection, insufficient anti-fall-off measures, improper construction processes, and inadequate post-construction maintenance, the slag well casting layers of most coal-fired power plant boilers have to be repaired annually, seriously affecting boiler operational safety. Therefore, the material for refractory layer 2 in this application is bauxite clinker, preferably high-alumina bauxite clinker. By fully considering the high temperature of slag and the impact of large slag pieces falling, high-alumina bauxite clinker can withstand the high temperature of slag up to 900℃, especially the radiant heat of 1700℃ from the flame center, and can also withstand the direct impact of large slag pieces, effectively improving the service life of slag wells and reducing the frequency of slag well repairs.

[0040] Optionally, the slag well body 1 includes a slag hopper, a vertical section, and an inclined section. A reinforcing frame 4 is provided on the slag hopper and / or the vertical section. The slag hopper and the vertical section are less likely to be directly impacted by slag, so only the reinforcing frame 4 needs to be provided to increase the overall structural strength of the refractory layer 2. However, the inclined section is more likely to be directly impacted by slag, and there are cases of large pieces of slag impacting it. Therefore, a reinforcing steel plate 5 needs to be provided on the inclined section to increase the structural strength of the inner wall of the slag well body 1 and the structural strength of the refractory layer 2.

[0041] In a second aspect, embodiments of this application provide a construction method for a dry ash discharge boiler ash well, comprising: Step S1: Weld anchoring components 3 and reinforcing steel plates 5 onto the inner wall of the slag well; Step S2: Tie the reinforcing frame 4 to the anchoring component 3; Step S3: Arrange the casting template and use castable refractory to cast the refractory layer 2.

[0042] By welding anchoring components 3 and reinforcing steel plates 5 to the inner wall of the slag well and binding reinforcing frames 4, the type of anchoring components 3 of the slag well body 1 to the refractory layer 2 is effectively optimized, the adhesion of the refractory layer 2 is improved, the problem of poor adhesion of the refractory layer 2 due to insufficient anchoring measures is reduced, and the structural reliability of the refractory layer 2 and the slag well is improved.

[0043] Step S1 further includes: The anchoring member 3 is bent into an "Ω" shape, and both ends of the anchoring member 3 are welded to the inner wall of the slag well. By setting the anchoring member 3 into an "Ω" shape, the anchoring member 3 can have a larger contact area and mechanical interlocking force, and can also distribute the stress of the refractory layer 2 evenly, reduce the problem of internal cracks in the refractory layer 2, and improve the structural reliability of the refractory layer 2.

[0044] In one embodiment of the second aspect, a weld leg is formed at the connection between the anchoring member 3 and the inner wall of the slag well, and the length of the weld leg is greater than or equal to 20 mm. By forming a weld leg of not less than 20 mm, the connection reliability between the anchoring member 3 and the slag well body 1 can be effectively improved. The weld leg and the slag well body 1 should be fully welded using heat-resistant steel welding rods.

[0045] Step S3 also includes: Expansion joints in the refractory layer are arranged as follows: the width of the expansion joints is 5mm, and the spacing of the expansion joints corresponds to the grid of the reinforcing steel plate 5. Wooden strips or aluminum silicate boards are sandwiched inside. Z-shaped expansion joints are made at the positions corresponding to the grid shape formed by the reinforcing steel plate 5. The depth of the expansion joints should penetrate the refractory refractory layer, and the depth of the expansion joints should not be less than 200mm.

[0046] The thickness of the refractory material in each part of the slag hopper shall not be less than 200mm.

[0047] Step S3 also includes: The castable is processed using a forced mixer and a high-frequency vibrator; Preferably, the water-cement ratio in the castable is less than 0.15.

[0048] The mixed refractory should be used within 0.5-1.0 hours; the material cannot be used after it has hardened.

[0049] During the pouring process, the formwork height is 600mm each time to facilitate material loading and vibration.

[0050] When casting the refractory layers 2 on both sides of the slag well body 1, the work should be carried out continuously and in a staggered manner to accommodate the initial setting time of the castable and to avoid the occurrence of construction joints.

[0051] The castable refractory should be vibrated continuously at least twice until the surface slurry returns without settling. Its density must be guaranteed.

[0052] During construction, it is important to note that the intersection of straight and sloping walls must be planed into an uneven shape with varying heights and irregularities, and the joint must be tight to prevent leakage.

[0053] Curing of the refractory layer 2 should begin 12 hours after it is poured. Under an ambient temperature of 15-20℃, the layer should be kept moist by sprinkling water for at least 72 hours.

[0054] Allow to cure naturally for 15 days at a natural temperature of 18-25℃.

[0055] The baking process can be carried out simultaneously with the boiler ignition start-up. When the temperature of refractory layer 2 rises from room temperature to 350℃, it should take no less than 72 hours, and when it rises from 350℃ to 600℃, it should take no less than 24 hours. The heating rate should be 10-15% ℃ / h to reach the standby state.

[0056] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A dry slag discharge boiler slag well, characterized in that: include: Slag well body (1); A refractory layer (2) is provided on the inner wall of the slag well body (1); Multiple anchoring components (3) are curved, and both ends of the anchoring components (3) are fixed to the inner wall of the slag well. All the anchoring components (3) are evenly distributed on the inner wall of the slag well. Multiple reinforcing frames (4) are arranged in a grid shape, and the reinforcing frames (4) are set on the inner wall of the slag well by the anchoring member (3); Multiple reinforcing steel plates (5) are arranged in a grid pattern and are fixed to the inner wall of the slag well. The anchoring component (3), the reinforcing frame (4), and the reinforcing steel plate (5) are all located within the fire-resistant layer (2).

2. The dry slag discharge boiler slag well according to claim 1, characterized in that: The anchoring member (3) includes a first anchor with a length direction in a first direction and a second anchor with a length direction in a second direction, wherein the first direction and the second direction have an included angle.

3. The dry slag discharge boiler slag well according to claim 2, characterized in that: All the anchoring members (3) are arranged in multiple rows, and in the same row, the first anchor and the second anchor are arranged at intervals, and the anchoring members (3) in adjacent rows are staggered.

4. The dry slag discharge boiler slag well according to claim 3, characterized in that: The spacing between two adjacent first anchors is between 180 mm and 220 mm; and / or, the spacing between two adjacent second anchors is between 180 mm and 220 mm.

5. The dry slag discharge boiler slag well according to any one of claims 1 to 4, characterized in that: The anchoring member (3) is Ω-shaped; and / or, the distance between the two ends of the anchoring member (3) is 70% to 90% of the thickness of the refractory layer (2); and / or, a weld leg is formed at the connection between the end of the anchoring member (3) and the inner wall of the slag well body (1), and the length of the weld leg is not less than 20 mm; and / or, the difference between the thickness of the refractory layer (2) and the maximum dimension from the anchoring member (3) to the inner wall of the slag well is greater than or equal to 30 mm.

6. The dry slag discharge boiler slag well according to claim 1, characterized in that: The reinforcing frame (4) is tied to the anchoring member (3).

7. The dry slag discharge boiler slag well according to claim 1, characterized in that: The grid shape includes at least two first profile lines extending along the length direction and a second profile line extending along the width direction, with the spacing between two adjacent first profile lines ranging from 600 mm to 1200 mm; and / or, the spacing between two adjacent second profile lines ranging from 600 mm to 1200 mm.

8. The dry slag discharge boiler slag well according to claim 1, characterized in that: The grid shape formed by the reinforcing steel plate (5) has at least two first profile lines extending along the length direction and a second profile line extending along the width direction. An expansion joint is provided between two adjacent reinforcing steel plates (5) in the same first profile line or in the same second profile line. The size of the expansion joint ranges from 2 mm to 5 mm.

9. The dry slag discharge boiler slag well according to claim 1, characterized in that: The width of the reinforcing steel plate (5) ranges from 40 mm to 80 mm; and / or the thickness of the reinforcing steel plate (5) ranges from 8 mm to 15 mm; and / or the material of the reinforcing steel plate (5) is Q235B.

10. The dry slag discharge boiler slag well according to claim 1, characterized in that: The refractory layer (2) is made of bauxite clinker.

11. The dry slag discharge boiler slag well according to claim 1, characterized in that: The slag well body (1) includes a slag bucket, a vertical section and an inclined section, the slag bucket and / or the vertical section are provided with the reinforcing frame (4), and the inclined section is provided with the reinforcing steel plate (5).

12. A construction method for a dry ash discharge boiler ash well according to any one of claims 1 to 11, characterized in that: include: Step S1: Weld anchoring components (3) and reinforcing steel plates (5) onto the inner wall of the slag well. Step S2: Tie the reinforcing frame (4) to the anchoring member (3); Step S3: Arrange the casting template and use castable refractory to cast the refractory layer (2).

13. The construction method according to claim 12, characterized in that: Step S1 also includes: The anchoring member (3) is bent into an "Ω" shape, and both ends of the anchoring member (3) are welded to the inner wall of the slag well.

14. The construction method according to claim 13, characterized in that: The connection between the anchoring member (3) and the inner wall of the slag well forms a weld leg, the length of which is greater than or equal to 20mm.

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