Kiln arch structure and roller hearth kiln with the kiln arch structure

Abstract

The present invention discloses a kiln roof structure and a roller hearth kiln having the kiln roof structure. The kiln roof structure includes two furnace walls and a roof supported on the two furnace walls. The roof includes at least one row of detachable roof rows, and on both sides of each row of detachable roof rows, there is respectively one row of fixed roof rows. The detachable roof rows are detachably installed on the fixed roof rows on both sides. The roller hearth kiln is a roller hearth kiln adopting the kiln roof structure. The present invention has the advantages of being able to quickly and simply disassemble and assemble the furnace roof, facilitating maintenance and repair, and being conducive to improving production efficiency, etc.

Description

Technical Field

[0001] The present invention relates to the technical field of heat treatment furnace equipment, and particularly relates to a furnace arch structure and a roller hearth kiln having the furnace arch structure. Background Art

[0002] The sintering process of materials such as positive electrode materials for lithium-ion batteries is basically realized through a roller hearth kiln. Due to the strong corrosiveness of the positive electrode materials, ordinary light refractory bricks cannot be used as furnace linings because they are not corrosion-resistant. Therefore, heavy high-aluminum refractory materials with strong corrosion resistance are widely used as the main furnace lining materials in the roller hearth kilns for sintering positive electrode materials of lithium-ion batteries.

[0003] The arch roof of the existing roller hearth kiln is composed of multiple rows of arch roof rows arranged in sequence. In each row of arch roof rows, multiple wedge-shaped refractory bricks are arranged in sequence to form an arch structure. The refractory bricks at both ends of the arch structure are supported on the furnace wall on both sides of the furnace body, so that the refractory bricks are mutually extruded to form a stable arch roof structure. This kind of arch roof has stable structure, long service life, high strength and strong corrosion resistance, but its maintainability is poor. Once it is made, it is very difficult to disassemble during the normal use of the kiln (once one brick is disassembled, the refractory bricks in this row of arch roof rows will lose the support structure, which will cause the entire row of the arch roof to collapse). For some furnace maintenance operations that require the disassembly of the arch roof, they need to be carried out under the conditions of production suspension or even furnace shutdown, resulting in extremely inconvenient maintenance and affecting production efficiency. At the same time, in the strong corrosive reaction atmosphere of materials such as lithium battery materials, it is inevitable that kiln furniture such as saggers or temperature zone partitions will be damaged during production. These damaged kiln furniture are inside the furnace chamber and stuck on the driving roller rods. If they cannot be taken out in time, it will affect continuous production at least, and may even cause major safety accidents such as arching of the kiln at worst. For these situations of kiln furniture damage, usually the roller rods stuck with the kiln furniture are pulled out, so that the kiln furniture falls to the bottom of the furnace chamber, and then the roller rods are reinserted. When the furnace is shut down for maintenance later, the inside of the furnace chamber is entered for cleaning. However, the damaged kiln furniture falling to the bottom of the furnace chamber not only has the risk of damaging the heating elements and other components at the bottom of the furnace chamber, but also the subsequent cleaning is extremely inconvenient. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies existing in the prior art, and provide a furnace arch structure that can be quickly and simply disassembled and assembled, is convenient for maintenance and repair, and is beneficial to improving production efficiency. Correspondingly, a roller hearth kiln having the furnace arch structure is also provided.

[0005] To solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A furnace arch structure includes two furnace walls and an arch roof supported on the two furnace walls. The arch roof includes at least one row of detachable arch roof rows, and on both sides of each row of detachable arch roof rows, there is a row of fixed arch roof rows respectively. The detachable arch roof rows are installed on the fixed arch roof rows on both sides in a detachable manner.

[0007] As a further improvement of the above technical solution:

[0008] The detachable arch top row is supported on the fixed arch top rows on both sides.

[0009] The detachable arch top row includes multiple first refractory bricks arranged in sequence to form an arch structure. The fixed arch top row includes multiple second refractory bricks arranged in sequence to form an arch structure. The second refractory bricks at both ends of the fixed arch top row are respectively supported on two furnace walls. Support parts are provided on both sides of the first refractory brick, and a holding part is provided on the second refractory brick. The support parts on both sides of each first refractory brick in the detachable arch top row are respectively supported on the holding parts of the second refractory bricks in the fixed arch top rows on both sides of the detachable arch top row.

[0010] The first refractory bricks at both ends of the detachable arch top row are respectively supported on two furnace walls.

[0011] The top surface of the support part is flush with the top surface of the second refractory brick.

[0012] The top surface of the support part is higher than the top surface of the second refractory brick.

[0013] The arch top has multiple rows of fixed arch top rows arranged at intervals in sequence, and a row of detachable arch top rows is provided between any two adjacent rows of fixed arch top rows.

[0014] The arch top has multiple rows of detachable arch top rows arranged at intervals in sequence, and two or more rows of fixed arch top rows are provided between any two adjacent rows of detachable arch top rows.

[0015] A roller hearth kiln has the above-mentioned kiln furnace arch top structure.

[0016] Compared with the prior art, the advantages of the present invention are as follows:

[0017] The arch top of the kiln furnace arch top structure of the present invention is provided with at least one row of detachable arch top rows. The detachable arch top rows are installed on the fixed arch top rows on both sides in a detachable manner, and the detachable arch top rows can be quickly and conveniently disassembled and assembled to perform maintenance on the interior of the kiln furnace hearth, improving the simplicity and timeliness of maintenance and ensuring production efficiency. Description of the Drawings

[0018] Figure 1 It is a schematic main sectional view structure of the kiln furnace arch top structure.

[0019] Figure 2 It is a schematic top view structure of the kiln furnace arch top structure.

[0020] Figure 3 It is a schematic front view structure of the detachable arch top row.

[0021] Figure 4 Schematic diagram of the structure where the first refractory brick is installed on the second refractory bricks on both sides in the first way.

[0022] Figure 5 Schematic diagram of the structure where the first refractory brick is installed on the second refractory bricks on both sides in the second way.

[0023] Legend:

[0024] 1. Furnace wall; 2. Removable arch row; 21. First refractory brick; 211. Support part; 3. Fixed arch row; 31. Second refractory brick; 311. Supporting part. Detailed implementation manners

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] As Figures 1 to 4 shown, the arch structure of the kiln furnace in this embodiment includes two furnace walls 1 and an arch supported on the two furnace walls 1. The arch includes at least one row of removable arch rows 2. On both sides of each row of removable arch rows 2, there is respectively provided one row of fixed arch rows 3. The removable arch rows 2 are installed on the fixed arch rows 3 on both sides in a detachable manner. The arch of the arch structure of this kiln furnace is provided with at least one row of removable arch rows 2, and the removable arch rows 2 are installed on the fixed arch rows 3 on both sides in a detachable manner, so that the removable arch rows 2 can be quickly and conveniently disassembled and assembled to perform maintenance and repair on the inner part of the kiln furnace hearth, improving the simplicity and timeliness of maintenance and repair and ensuring production efficiency.

[0027] Specifically, the arch in this embodiment includes multiple rows of removable arch rows 2. In other embodiments, the arch may also be provided with only one row of removable arch rows 2.

[0028] In this embodiment, the removable arch rows 2 are supported on the fixed arch rows 3 on both sides, that is, the removable arch rows 2 are installed on the fixed arch rows 3 on both sides in a detachable manner by means of support, so that the installation stability of the removable arch rows 2 is good and the disassembly and assembly are simple.

[0029] In this embodiment, the detachable arch top row 2 includes multiple first refractory bricks 21 arranged in sequence to form an arch-shaped structure. The fixed arch top row 3 includes multiple second refractory bricks 31 arranged in sequence to form an arch-shaped structure. The second refractory bricks 31 at both ends of the fixed arch top row 3 are respectively supported on two furnace walls 1. The multiple second refractory bricks 31 are pressed against each other under their own weights and form a stable and firm arch-shaped structure under the support of the two furnace walls 1. Support portions 211 are provided on both sides of the first refractory bricks 21, and holding portions 311 are provided on the second refractory bricks 31. The support portions 211 on both sides of each first refractory brick 21 in the detachable arch top row 2 are respectively supported on the holding portions 311 of the second refractory bricks 31 in the fixed arch top rows 3 on both sides of the detachable arch top row 2. Each first refractory brick 21 in the detachable arch top row 2 is separately supported and installed on the holding portions 311 of the second refractory bricks 31 in the fixed arch top rows 3 on both sides, and can be separately disassembled and assembled without affecting other first refractory bricks 21. At the same time, the above-mentioned detachable arch top row 2 is an arch-shaped structure formed by arranging multiple refractory bricks in sequence, retaining the advantages of the spliced arch top of multiple refractory bricks and ensuring detachable. In addition, the detachable installation structure in which the first refractory brick 21 is provided with a support portion 211 and supported on the holding portion 311 of the second refractory brick 31 is not only simple in structure, low in cost and easy to manufacture, but also good in installation stability and convenient in disassembly and assembly.

[0030] In this embodiment, preferably, the first refractory bricks 21 at both ends of the detachable arch top row 2 are respectively supported on two furnace walls 1, so that the multiple first refractory bricks 21 in the detachable arch top row 2 are pressed against each other under their own weights and form a stable and firm arch-shaped structure.

[0031] In this embodiment, as Figure 4 shown, the top surface of the support portion 211 is flush with the top surface of the second refractory brick 31, that is, the holding portion 311 of the second refractory brick 31 is lower than the top surface of the second refractory brick 31 to form a receiving groove. The support portion 211 of the first refractory brick 21 is placed in the receiving groove and supported on the holding portion 311 of the second refractory brick 31. In this way, there is no protruding structure on the entire top surface of the arch top, which is beneficial to improving the structural compactness and aesthetics, and is also beneficial to improving the heat insulation performance of the kiln furnace.

[0032] In other embodiments, the top surface of the support portion 211 can also be higher than the top surface of the second refractory brick 31 (see Figure 5 ), so that the support portion 211 of the first refractory brick 21 protrudes from the fixed arch top row 3, which is convenient for disassembling and assembling the first refractory brick 21.

[0033] In this embodiment, the vault has multiple rows of fixed vault rows 3 arranged at intervals in sequence, and there is a row of detachable vault rows 2 provided between any two adjacent rows of fixed vault rows 3. That is, the vault has multiple rows of detachable vault rows 2 and multiple rows of fixed vault rows 3, and the multiple rows of detachable vault rows 2 and the multiple rows of fixed vault rows 3 are arranged alternately in sequence. This enables the vault to be disassembled at multiple positions, facilitating the maintenance and repair of different positions inside the furnace chamber of the kiln.

[0034] In other embodiments, it is also possible that the vault has multiple rows of detachable vault rows 2 arranged at intervals in sequence, and there are more than two rows of fixed vault rows 3 provided between any two adjacent rows of detachable vault rows 2. The number and positions of the detachable vault rows 2 and the fixed vault rows 3 can be set according to actual needs.

[0035] In this embodiment, both the first refractory brick 21 and the second refractory brick 31 are made of heavy refractory materials to ensure that they have sufficient strength, and preferably 95 - 99% alumina hollow ball bricks are used.

[0036] A roller hearth kiln has the furnace vault structure of this embodiment. The bottom of the two furnace walls 1 of this furnace vault structure is connected to the furnace bottom structure to form the furnace chamber of the roller hearth kiln. Since this roller hearth kiln adopts the furnace vault structure of this embodiment, it also has the advantages possessed by this furnace vault structure.

[0037] When the kiln furniture is damaged in the furnace chamber of the roller hearth kiln or it is necessary to maintain and repair the kiln furniture inside the furnace chamber, the detachable vault rows 2 of the detachable furnace vault structure can be disassembled, and the damaged kiln furniture can be clamped out and replaced or the maintenance and repair work can be carried out using a fixture. After the replacement or maintenance and repair work is completed, the detachable vault rows 2 can be reinstalled.

[0038] The above are only the preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. For those skilled in the art of this technology, the improvements and transformations obtained without departing from the technical concept of the present invention should also be regarded as within the protection scope of the present invention.

Claims

1. A kiln roof structure, comprising two furnace walls (1) and a roof supported on the two furnace walls (1), characterized in that: The vault includes at least one row of detachable vault rows (2), and on both sides of each row of detachable vault rows (2), there is respectively arranged a row of fixed vault rows (3), and the detachable vault rows (2) are detachably mounted on the fixed vault rows (3) on both sides; The detachable vault rows (2) are supported on the fixed vault rows (3) on both sides; The detachable vault rows (2) include multiple first refractory bricks (21) arranged in sequence to form an arch structure, the fixed vault rows (3) include multiple second refractory bricks (31) arranged in sequence to form an arch structure, the second refractory bricks (31) at both ends of the fixed vault rows (3) are respectively supported on two furnace walls (1), support portions (211) are provided on both sides of the first refractory bricks (21), holding portions (311) are provided on the second refractory bricks (31), and the support portions (211) on both sides of each first refractory brick (21) in the detachable vault rows (2) are respectively supported on the holding portions (311) of the second refractory bricks (31) in the fixed vault rows (3) on both sides of the detachable vault rows (2). Both the first refractory bricks (21) and the second refractory bricks (31) are made of heavy refractory materials.

2. The kiln roof structure according to claim 1, characterized in that: The first refractory bricks (21) at both ends of the detachable vault rows (2) are respectively supported on two furnace walls (1).

3. The kiln roof structure according to claim 1, wherein: The top surface of the support portion (211) is flush with the top surface of the second refractory brick (31).

4. The kiln roof structure according to claim 1, characterized in that: The top surface of the support portion (211) is higher than the top surface of the second refractory brick (31).

5. The kiln roof structure according to claim 1, characterized in that: The vault has multiple rows of fixed vault rows (3) arranged at intervals in sequence, and there is a row of detachable vault rows (2) provided between any two adjacent rows of fixed vault rows (3).

6. The kiln roof structure according to claim 1, characterized in that: The vault has multiple rows of detachable vault rows (2) arranged at intervals in sequence, and there are two or more rows of fixed vault rows (3) provided between any two adjacent rows of detachable vault rows (2).

7. A roller hearth kiln, characterized in that: The roller hearth kiln has the kiln furnace vault structure according to any one of claims 1 to 6.

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