Corner structure of top furnace wall of incineration hearth

Abstract

The utility model relates to the technical field of incinerators, and discloses a corner structure of a furnace wall at the top of an incineration hearth, which comprises a refractory layer, a heat insulation layer, a heat preservation layer and a shell which are sequentially arranged from inside to outside, the refractory layer comprises a plurality of refractory bricks, a plurality of auxiliary supporting assemblies, a first castable with the section of an L-shaped structure, a first expansion joint and a second expansion joint, the first expansion joint is arranged between the top of the first castable and the auxiliary supporting assemblies, and the second expansion joint is located between the horizontal hearth top brick and the first castable; the heat insulation layer is made of a castable II; the heat preservation layer is composed of a fiber board. And the shell is a steel plate. The scheme is arranged in a high-temperature combustion area of the incineration hearth, the supporting weight of the refractory layer can be dispersed, expansion hazards caused by high temperature and structural stress of the refractory layer at the independent corner can be absorbed, the number of blowing-out times of the incineration hearth due to the problem of a furnace wall is reduced, and economic benefits are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to incinerator technical field especially relates to a corner structure of incinerator hearth top furnace wall. BACKGROUND

[0002] With the improvement of productivity of our country, people's demand for environmental protection is also higher and higher, especially the emission index of atmospheric pollutants also constantly improves along with people's environmental protection consciousness, various industrial by-products toxic and harmful gas is discharged into the atmosphere along with tail gas, seriously affects people's health, through high temperature combustion reaction to eliminate most of the harmful components in waste gas becomes an important link of tail gas treatment, high temperature combustion mostly adopts incinerator hearth and special combustion chamber, and the burner auxiliary guarantee furnace reaction temperature.

[0003] The main combustion area (850-1200 DEG C) of the conventional incinerator hearth or secondary combustion chamber adopts the form of vertical cylinder and horizontal hearth, the inner side generally adopts heavy furnace wall of heat resisting brick masonry as heat insulation barrier, the outer side of heat resisting brick is sequentially provided with heat insulation layer and heat preservation layer, and finally fixed on the outer protective plate, such hearth meets the performance of heat insulation and heat preservation, can prevent external overheating and overtemperature to ensure safety;

[0004] But in actual use, the transition area of vertical and horizontal hearth has significant problems, since the upper refractory brick will deform and extrude under high temperature, and the lower part will generate greater thermal expansion due to high temperature combustion, these factors jointly cause the furnace wall of transition area to bear complex stress, and after long time use, local damage can easily appear and even collapse, this kind of local damage not only affects the long-term stable operation of the furnace, but also can lead to harmful gas leakage, seriously threatens the personal safety of operating personnel.

[0005] Therefore, a more reliable solution is needed to solve this problem to ensure the safety and stability of the furnace. CONTENT OF THE UTILITY MODEL

[0006] The utility model aims at overcoming the insufficient in the prior art, and provides a corner structure of incinerator hearth furnace wall top, which should have the characteristics of firm structure and good stability.

[0007] In order to achieve the above object, the utility model adopts the following technical scheme:

[0008] The corner structure of the furnace wall of the incinerator top comprises, from inside to outside, a refractory layer, a heat insulation layer, a heat preservation layer and a shell; the refractory layer comprises a plurality of refractory bricks, a plurality of auxiliary support assemblies, a castable No. 1 with an L-shaped structure in cross section, a expansion joint No. 1 arranged between the top of the castable No. 1 and the auxiliary support assembly, and an expansion joint No. 2 between the horizontal furnace top brick and the castable No. 1; the heat insulation layer is composed of a castable No. 2; the heat preservation layer is composed of a fiberboard; and the shell is a steel plate.

[0009] As a preferred technical scheme of the utility model, the auxiliary support assembly comprises a pulling brick, a supporting brick, a brick supporting frame and a grappling hook, the pulling brick is arranged below the refractory brick, one end of the grappling hook is fixed with the steel plate, the other end of the grappling hook passes through the heat preservation layer and the heat insulation layer in sequence, and the grappling hook is fixed with the pulling brick, the supporting brick is arranged between the pulling brick and the expansion joint No. 1, the brick supporting frame is fixed with the inner side of the steel plate, and one side of the supporting brick extends to the heat insulation layer, and the supporting brick frame is arranged on the brick supporting frame.

[0010] As a preferred technical scheme of the utility model, the refractory layer is provided with a fastening assembly, the fastening assembly comprises an anchoring brick and a brick clamp, the anchoring brick is arranged between the expansion joint No. 2 and the castable No. 1, and the anchoring brick is fixed with the bottom of the steel plate through the brick clamp.

[0011] As a preferred technical scheme of the utility model, the material of the anchoring brick is corundum, the side wall of the anchoring brick is in a tooth-shaped structure, and the anchoring brick is engaged with the castable No. 1.

[0012] As a preferred technical scheme of the utility model, the inside of the expansion joint No. 1 and the expansion joint No. 2 is filled with aluminum silicate refractory fiber paper.

[0013] As a preferred technical scheme of the utility model, a plurality of grappling nails are fixed between the inside of the castable No. 1 and the steel plate, and the grappling nails are welded with the steel plate.

[0014] The utility model has the following beneficial effects:

[0015] 1、enhance the stability of structure: this scheme constructs a stable refractory layer, these components not only enhance the stability of horizontal and vertical, also effectively prevent the deformation and extrusion problem under high temperature condition, improve the stability and durability of the whole structure of furnace corner, ensure the reliability under extreme working conditions;

[0016] 2. Adaptation to thermal expansion: To address the problem of thermal expansion in high-temperature environments, expansion joints filled with aluminum silicate refractory fiber paper are provided between the castable and the auxiliary support assembly, as well as between the horizontal hearth top brick and the castable. This design allows the structure to freely expand or contract with temperature changes, thereby avoiding stress accumulation and material damage due to thermal expansion, significantly extending the service life of the furnace wall and reducing maintenance requirements;

[0017] 3. Improved thermal insulation and heat retention: The thermal insulation layer uses lightweight insulating castable as a transition layer between the refractory layer and the insulation layer, which not only reduces the overall weight of the structure but also provides excellent thermal insulation. The insulation layer uses aluminum silicate fiber board, which effectively maintains the temperature inside the furnace, reduces heat loss, improves energy utilization efficiency, controls the temperature of the outer shell to prevent overheating, and ensures the safety of operating personnel;

[0018] 4. Improved stress distribution in the transition area: The design of the brick support frame and the support brick takes into account the needs of the vertical and horizontal hearth transition area. The brick support frame is fixed to the inside of the steel plate, and the support brick frame is arranged on it and extends to the thermal insulation layer. This arrangement can disperse the stress from the upper and lower parts, reducing the risk of local stress concentration. This not only solves the problem of easy damage in the transition area of the prior art, but also greatly improves the structural integrity of the area, increasing the service life of the furnace wall;

[0019] 5. Improved safety: By strengthening the structural integrity and stability of the furnace corner area, this scheme effectively reduces the risk of harmful gas leakage due to structural damage, ensuring the reliability of the structure in high-temperature environments and improving the safety of the incinerator operation. Protect the safety of operating personnel. At the same time, through the stability and adaptability of the furnace corner structure, this scheme can reduce the number of unplanned shutdowns of the incinerator due to furnace wall problems. Stable structure and effective thermal expansion management reduce maintenance requirements and repair frequency, improve the operation efficiency and reliability of the incinerator, and thus reduce economic losses caused by shutdown;

[0020] 6. Improved temperature resistance: Thanks to the combination of support bricks and support frames, the metal bracket is hidden in the thermal insulation layer and the insulation layer, and the pull brick participates in the stress, effectively preventing high-temperature flue gas from directly acting on the metal components and damaging the wall, improving the high-temperature resistance of the entire structure. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 A structural diagram of a corner structure of a furnace wall of a furnace top of an incinerator is proposed for the utility model;

[0022] Figure 2 A structural diagram of a refractory brick, a pull brick, and a support brick.

[0023] In the figure: 1 firebrick, 2 pulling brick, 3 supporting brick, 4 expansion joint I, 5 castable I, 6 expansion joint II, 7 anchor nail, 8 supporting brick frame, 9 steel plate, 10 grab hook, 11 fiberboard, 12 castable II, 13 anchoring brick, 14 brick clamp. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0025] Embodiment one

[0026] With reference to Figures 1-2 A corner structure of a furnace wall of a top of a furnace of an incinerator, comprising, from inside to outside, a refractory layer, a heat insulation layer, a heat preservation layer and a shell;

[0027] The refractory layer comprises a plurality of firebricks 1, a plurality of auxiliary support assemblies, castable I 5 with an L-shaped cross section, expansion joint I 4 and expansion joint II 6. The top of the firebrick 1 is a vertical furnace, the expansion joint I 4 is arranged between the top of the castable I 5 and the auxiliary support assembly, the expansion joint II 6 is located between the horizontal furnace top brick and the castable I 5, and the interiors of the expansion joint I 4 and the expansion joint II 6 are both filled with aluminum silicate refractory fiber paper. The heat insulation layer is composed of castable II 12, which is light heat insulation castable. The heat insulation layer serves as a transition layer between the refractory layer and the heat preservation layer, and has certain support and heat insulation effects, and is used between the firebrick 1 and the fiberboard 11 and between the castable I 5 and the fiberboard 11. The heat preservation layer is composed of the fiberboard 11, which is made of aluminum silicate material and can effectively maintain the temperature of the furnace and prevent the temperature of the furnace shell from being too high. The shell is a steel plate 9, a plurality of anchor nails 7 are fixed between the interior of the castable I 5 and the steel plate 9, and the anchor nails 7 are welded and fixed to the steel plate 9. The castable I 5 is high-aluminum refractory castable.

[0028] The auxiliary support assembly includes a pulling brick 2, a support brick 3, a brick supporting frame 8 and a hook 10. The pulling brick 2 is arranged below the refractory brick 1 and is arranged in the horizontal direction at intervals, thereby enhancing the stability of the support brick 3 and the refractory brick 1 in the transverse direction. The gaps between the refractory bricks 1, the gaps between the pulling bricks 2 and the gaps between the support bricks 3 are staggered in the vertical direction and are stacked in a staggered manner, thereby enhancing the stability of the overall structure of the furnace corner. One end of the hook 10 is fixed to the steel plate 9, the other end of the hook 10 passes through the heat preservation layer and the heat insulation layer in sequence, and the hook 10 is fixed to the pulling brick 2. The support brick 3 is arranged between the pulling brick 2 and the expansion joint 4. The brick supporting frame 8 is fixed to the inner side of the steel plate 9. One side of the support brick 3 extends to the heat insulation layer, and the support brick 3 is arranged on the brick supporting frame 8. Further, the outer part of the brick supporting frame 8 is insulated by the refractory castable. The brick supporting frame 8 and the heat insulation layer are combined together. The brick supporting frames 8 are arranged in the horizontal direction at intervals and maintain a certain gap between adjacent brick supporting frames 8. Each support brick 3 is arranged on a brick supporting frame 8. The width of the brick supporting frame 8 is less than the width of two support bricks 3, so as to form a gap between the brick supporting frames 8 and avoid the influence of thermal expansion on the support.

[0029] When the high-temperature flue gas passes through the furnace, a stable refractory layer is formed by the refractory brick 1, the castable 5 and the auxiliary support assembly, and the expansion joint filled with aluminum silicate refractory fiber paper is combined to adapt to thermal expansion. The arrangement of the brick supporting frame 8 can support the vertical furnace. The intermediate heat insulation layer is made of lightweight heat insulation castable, which provides excellent heat insulation effect while reducing the weight of the structure. The heat preservation layer uses aluminum silicate fiber board to effectively maintain the temperature in the furnace and reduce heat loss. The outermost steel plate 9 and the internal hook 7 and hook 10 fixing system ensure the overall structural strength. This design not only enhances the stability and durability in high-temperature environment, but also improves energy efficiency and ensures operation safety.

[0030] Embodiment Two

[0031] Embodiment Two includes the content of Embodiment One. The technical features disclosed in Embodiment One are also applicable to this embodiment. The technical feature description of Embodiment One is not repeated. The implementation of the corner structure of the top furnace wall of the incinerator furnace is further described in detail below with reference to the accompanying drawings.

[0032] Reference Figure 1The refractory layer is provided with a fastening assembly, the fastening assembly comprises an anchor brick 13 and a brick clamp 14, the anchor brick 13 is arranged between the expansion joint two 6 and the castable one 5, and the anchor brick 13 is fixed with the bottom of the steel plate 9 through the brick clamp 14, one end of the brick clamp 14 is welded on the bottom of the steel plate 9, and the other end extends to the heat insulation layer, one end of the anchor brick 13 extends to the heat insulation layer, and the anchor brick 13 is connected with the heat insulation layer, thereby playing a role of fastening the overall structure, further, the anchor brick 13 is made of corundum, the side wall of the anchor brick 13 is in a tooth-shaped structure, and the anchor brick 13 is engaged with the castable one 5, thereby increasing the stability of the anchor brick 13 in fixing the castable one 5.

[0033] The anchor brick 13 is arranged to adapt the furnace corner structure to higher temperature, especially for the furnace with a flat top, the long-term use temperature of the anchor brick 13 can reach 1200 DEG C, the anchor brick 13 can fix the castable one 5 in the vertical direction, and the stability of the fixed corner overall structure is further improved on the basis of the fixing mode of the metal anchor, the problem that the castable is easily separated at the corner can be solved, and the service life of the incineration furnace is prolonged.

[0034] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, and all of them should be covered in the protection scope of the present application.

Claims

1. A corner structure of a furnace wall of a furnace top of an incinerator, characterized by, The fireproof layer, the heat insulation layer, the heat preservation layer and the shell are arranged in sequence from inside to outside. The fireproof layer comprises a plurality of firebricks (1), a plurality of auxiliary support assemblies, a castable (5) with an L-shaped cross section, a first expansion joint (4) and a second expansion joint (6), the first expansion joint (4) is arranged between the top of the castable (5) and the auxiliary support assembly, and the second expansion joint (6) is located between the horizontal hearth top brick and the castable (5). The heat insulation layer is composed of a castable (12). The heat preservation layer is composed of a fiberboard (11). The shell is a steel plate (9).

2. A corner structure of a furnace wall of a furnace top of an incinerator according to claim 1, characterized in that The auxiliary support assembly comprises a pulling brick (2), a supporting brick (3), a brick supporting frame (8) and a grappling hook (10), the pulling brick (2) is arranged below the firebrick (1), one end of the grappling hook (10) is fixed to the steel plate (9), the other end of the grappling hook (10) sequentially passes through the heat preservation layer and the heat insulation layer, and the grappling hook (10) is fixed to the pulling brick (2), the supporting brick (3) is arranged between the pulling brick (2) and the first expansion joint (4), the brick supporting frame (8) is fixed to the inner side of the steel plate (9), and one side of the supporting brick (3) extends to the heat insulation layer, and the supporting brick (3) is arranged on the brick supporting frame (8).

3. A corner construction of a furnace wall of a furnace top of an incinerator according to claim 1, characterized in that The fireproof layer is provided with a fastening assembly, the fastening assembly comprises an anchoring brick (13) and a brick clamp (14), the anchoring brick (13) is arranged between the second expansion joint (6) and the castable (5), and the anchoring brick (13) is fixed to the bottom of the steel plate (9) through the brick clamp (14).

4. A corner construction of a furnace wall of a furnace top of an incinerator according to claim 3, characterized in that The anchoring brick (13) is made of corundum, the side wall of the anchoring brick (13) has a tooth-shaped structure, and the anchoring brick (13) is engaged with the castable (5).

5. A corner construction of a furnace wall of a furnace top of an incinerator according to claim 1, characterized in that The first expansion joint (4) and the second expansion joint (6) are both filled with aluminum silicate refractory fiber paper.

6. A corner construction of a furnace wall of a furnace top of an incinerator according to claim 1, characterized in that A plurality of grab nails (7) are fixed between the castable (5) and the steel plate (9), and the grab nails (7) are welded to the steel plate (9).

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