A partition device for a rotary kiln and a rotary kiln

Abstract

The present invention discloses a partition device for a rotary kiln, comprising a partition row, wherein the partition row comprises a plurality of partitions arranged in sequence along the axial direction of a rotary drum in the rotary kiln, wherein the plate surface of each partition is parallel to the axial direction of the rotary drum; in the partition row, adjacent partitions have a partition gap of a preset size between them; the partition row comprises multiple rows, wherein the first end of each partition row is respectively fixed to the inner wall of the rotary drum along the axial direction, and the second ends of each partition row are respectively fixedly connected to each other. The partition row in the partition device divides the internal space of the rotary drum into a plurality of interconnected fan-shaped material spaces, which not only improves the filling rate of the material, but also allows the material to flow between different material spaces through the partition gaps of the partition row, causing the material to suspend and fly, thereby improving the heat exchange efficiency, shortening the calcination time, reducing the probability of rolling into balls, and achieving improved production efficiency. The present invention also discloses a rotary kiln, which uses the above-mentioned partition device, has a high filling rate, good heat exchange effect, and significantly improved production efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical equipment manufacturing and energy-saving technology, and more particularly to a partition device of a rotary kiln and a rotary kiln. Background Art

[0002] Rotary kilns are widely used in production industries such as building materials, metallurgy, chemical industry, and environmental protection. They mainly process solid materials through an inclined rotary drum.

[0003] In the existing rotary kiln, the internal space of the rotary drum is cylindrical. During production, the material only rolls and slides at the bottom of the rotary drum under the action of the rotary drive of the rotary drum, resulting in the inability to fill the rotary drum with too much material, so as not to affect the heat exchange effect of the material, and the production efficiency is low.

[0004] In summary, how to improve the filling rate of the rotary kiln and ensure that the material has a good heat exchange effect to improve production efficiency is an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0005] In light of this, the present invention provides a baffle device for a rotary kiln. The baffle rows divide the interior of the rotary drum into multiple interconnected, fan-shaped material spaces. This not only increases the material filling rate, but also allows the material to flow between the different material spaces through the gaps between the baffles in the baffle rows, causing the material to suspend and fly, improving heat exchange efficiency and ultimately increasing production efficiency. The present invention also provides a rotary kiln utilizing the baffle device, achieving a high filling rate, excellent heat exchange, and significantly improved production efficiency.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A partition device for a rotary kiln, characterized in that it comprises a partition row, wherein the partition row comprises a plurality of partitions arranged in sequence along the axial direction of a rotary drum in the rotary kiln, wherein the plate surface of each partition is parallel to the axial direction of the rotary drum; and protruding ribs are respectively provided on both side surfaces of the partition;

[0008] In the partition row, there is a partition gap of preset size between adjacent partitions; there are multiple rows of partitions, and the first end of each partition row is axially fixed to the inner wall of the rotating drum, and the second ends of each partition row are fixedly connected to each other.

[0009] Preferably, in the above-mentioned partition device, at least some of the partitions in the partition row are provided with leakage holes.

[0010] Preferably, in the above-mentioned partition device, the partition gaps of any one partition row and the partition gaps of an adjacent partition row are staggered.

[0011] Preferably, in the above-mentioned partition device, the second end of each partition row is respectively located at the central axis of the rotating drum, and the plate surface of each partition in each partition row is respectively parallel to the radial direction of the rotating drum.

[0012] Preferably, in the above partition device, there are 4 rows of partitions.

[0013] Preferably, in the above-mentioned partition device, the partition rows are evenly distributed along the circumferential direction.

[0014] Preferably, in the above-mentioned partition device, all the partition rows form an integrated structure.

[0015] Preferably, in the above-mentioned partition device, the integrated structure is integrally sintered from SiC.

[0016] A rotary kiln comprises a rotary drum and a partition device, wherein the partition device is the partition device described in any one of the above technical solutions; two adjacent rows of partitions in the partition device and the inner wall of the rotary drum between the two rows of partitions form a material space with a fan-shaped cross section.

[0017] Preferably, in the above rotary kiln, the refractory lining layer of the rotary drum is provided with slots, and the partition rows are inserted and fixed in the slots.

[0018] The present invention provides a partition device for a rotary kiln, comprising a partition row, wherein the partition row comprises a plurality of partitions sequentially arranged along the axial direction of a rotary drum in the rotary kiln, wherein the plate surface of each partition is parallel to the axial direction of the rotary drum; in the partition row, a partition gap of a preset size is provided between adjacent partitions; the partition row comprises multiple rows, wherein the first end of each partition row is respectively fixed to the inner wall of the rotary drum along the axial direction, and the second ends of each partition row are respectively fixedly connected to each other.

[0019] After the above-mentioned baffle device is assembled on the rotary drum, the internal space of the rotary drum is divided into multiple material spaces with fan-shaped cross-sections and interconnected, and each material space is connected through the gap of the baffle; when in use, each material space is filled with material respectively, so that the material reaches the upper, middle and lower parts of the rotary drum during the rotation of the rotary drum, rather than just being in the lower part of the rotary drum, which not only improves the filling rate, but also reduces the temperature difference at the height inside the rotary drum, making the temperature field more uniform, greatly reducing the proportion of sensible heat carried away by exhaust gas, and improving the heat exchange effect.

[0020] In addition, after running a certain distance in the material space, the material reaches the gap between the partitions and leaks, and the leaked material enters the adjacent material space, realizing continuous circulation between the various material spaces. During the circulation process, the material continuously rotates, rises, slides, rolls, suspends, mixes, etc., forming an effect of flying materials in the rotary drum, increasing the probability and time of suspended heat exchange of the material, and making the material mixing effect stronger; at the same time, the partition device changes the existing rotary kiln material movement form which is mainly sliding, so that the material will inevitably undergo a large amount of suspended dynamic strong heat exchange in the process of the flue gas passing through the temperature field of the entire rotary drum, which greatly increases the dense phase dynamic heat exchange and further improves the heat exchange effect.

[0021] The present invention also provides a rotary kiln which uses the above-mentioned partition device, has a high filling rate and good heat exchange effect, and is conducive to improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 A schematic diagram of the three-dimensional structure of a rotary kiln provided in an embodiment of the present invention;

[0024] Figure 2 A schematic side view of the rotary kiln provided in an embodiment of the present invention;

[0025] Figure 3 for Figure 2 Cross-sectional view of AA;

[0026] in, Figure 1-Figure 3 middle:

[0027] Partition 101; ribs 102; rotary drum 103; support base 104; leakage hole 111; partition gap 01. DETAILED DESCRIPTION

[0028] Embodiments of the present invention disclose a baffle device for a rotary kiln. The baffle rows divide the interior of the rotary drum into multiple fan-shaped material spaces, increasing the material filling rate while allowing the material to flow between the different material spaces through the gaps between the baffles. This causes the material to suspend and fly, improving heat exchange efficiency and ultimately increasing production efficiency. Embodiments of the present invention also disclose a rotary kiln utilizing the baffle device, achieving a high filling rate, excellent heat exchange, and significantly improved production efficiency.

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] See also Figure 1-Figure 3 An embodiment of the present invention provides a partition device for a rotary kiln, including a partition row, wherein the partition row includes a plurality of partitions 101 arranged in sequence along the axial direction of a rotary drum 103 in the rotary kiln, and the plate surface of each partition 101 is parallel to the axial direction of the rotary drum 103; in the partition row, there is a partition gap 01 of a preset size between adjacent partitions 101; the partition row is composed of multiple rows, and the first end of each partition row is respectively fixed to the inner wall of the rotary drum 103 along the axial direction, and the second end of each partition row (the second end is opposite to the first end) is respectively fixedly connected to each other.

[0031] When installed on the rotary drum 103, the baffle device divides the interior of the drum 103 into multiple material spaces with fan-shaped cross-sections. Adjacent material spaces are connected by baffle gaps 01. During operation, each material space is filled separately, allowing the material to reach the upper, middle, and lower portions of the drum 103 as it rotates, rather than confining it to the lower portion. This not only improves the filling rate but also reduces temperature differences across the height of the drum 103, resulting in a more uniform temperature field, significantly reducing the proportion of sensible heat carried away by the exhaust gas, and improving heat exchange efficiency.

[0032] In addition, after running a certain distance in the material space, the material reaches the partition gap 01 and leaks, and the leaked material enters the adjacent material space, realizing continuous circulation between the various material spaces. During the circulation process, the material continuously rotates, rises, slides, rolls, suspends, mixes, etc., forming an effect of flying materials in the rotary drum 103, increasing the probability and time of material suspension heat exchange, and making the material mixing effect stronger; at the same time, the partition device changes the existing rotary kiln material movement form which is mainly sliding, so that the material will inevitably undergo a large amount of suspension dynamic strong heat exchange in the process of the flue gas passing through the temperature field of the entire rotary drum 103, which greatly increases the dense phase dynamic heat exchange and further improves the heat exchange effect.

[0033] In order to improve the flow efficiency of materials in different material spaces, in the partition row of the partition device, at least some of the partitions 101 are provided with leakage holes 111. The leakage holes 111 can be set to be circular holes, elongated holes, triangles, etc. The present embodiment does not limit the shape of the leakage holes 111. The leakage holes 111 on each partition 101 can be set to be one or more. When there are multiple leakage holes 111, they can be arranged evenly or unevenly. The present embodiment does not limit them. The partition 101 can be set to be composed of a complete plate, or it can be set to be formed by multiple plates fixedly connected in sequence along the axial direction of the rotary drum 103. The present embodiment does not limit the structure of the partition 101.

[0034] In the above-mentioned partition device, the partition gap 01 of any partition row and the partition gap 01 of the adjacent partition row are staggered, or some of the partition gaps 01 in two adjacent partition rows are aligned and some are staggered. This embodiment does not limit this, and it is only necessary to ensure that the material leaked from the partition gap 01 reaches the material space adjacent to the partition row, rather than passing through the adjacent material space to reach the next material space.

[0035] The size of the partition gap 01 in the partition row can be set according to the type of material, the rotation speed of the rotary drum 103, etc. Specifically, the size of the preset gap can be set according to actual needs so that only part of the material leaks when passing through the partition gap 01, or so that all the material leaks when passing through the partition gap 01.

[0036] Preferably, in the baffle device provided in the above embodiment, the second end of each baffle row is located at the central axis of the rotating drum 103, and the plate surface of each baffle 101 in each row is parallel to the radial direction of the rotating drum 103. All baffle rows are evenly distributed along the circumference of the rotating drum 103 to divide the internal space of the rotating drum 103 into multiple material spaces of uniform size. The number of baffle rows can be 2, 3, 4, 5, 6, etc., and this embodiment does not limit this.

[0037] The second ends of each baffle row can be connected and fixed with high-temperature resistant components. However, to improve the reliability of the baffle assembly, all baffle rows are configured as a single-piece structure, with a central axis formed at the second end of each baffle row, integral with all baffles. This single-piece structure can be made of SiC, which has a low thermal expansion coefficient and thermal deformation, and is resistant to high temperatures, wear, and corrosion.

[0038] In order to further improve the heat transfer effect, in the above-mentioned partition device, both side surfaces of the partition 101 are respectively provided with protruding ribs 102.

[0039] In this embodiment, ribs 102 are respectively provided on the partitions 101 on both sides of the material space, among which the ribs 102 on the partition 101 facing the rotation direction play a role of hooking the material, which can bring the material to a higher space and make the material slide freely at the highest possible position, thereby thinning the thickness of the overall material layer and making the material thickness constantly change, increasing the probability of material suspension, so that it can fully contact the hot air; the ribs 102 on the partition 101 facing the opposite direction of rotation can catch the material falling from above, thin the material layer on the curved inner wall of the rotary drum 103 in the material space, and increase the penetration effect of the flame; at the same time, the ribs 102 also have a heat transfer effect, which can increase the heat conduction effect on the material layer close to the partition 101.

[0040] The partition device provided in this embodiment has a good material lifting effect, preventing the material from "nesting", "balling" and "agglomerating".

[0041] Another embodiment of the present invention provides a rotary kiln comprising a rotary drum 103 and a partition assembly, the partition assembly being the partition assembly described in the above embodiment. Two adjacent rows of partitions in the partition assembly and the inner wall of the rotary drum 103 between the two rows of partitions define a material space having a fan-shaped cross-section. The rotary drum 103 is supported by a support base 104.

[0042] In this rotary kiln, the refractory lining of the rotary drum 103 is provided with slots arranged axially along the drum 103, into which the baffles are inserted and secured. During assembly, the first ends of the baffles are inserted into the pre-determined slots within the rotary kiln. The baffles are then cast and secured to the rotary drum 103 using a castable. This results in greater load-bearing capacity, safe and stable operation, high-temperature resistance, and a rational structure.

[0043] The rotary kiln provided in this embodiment uses the partition device provided in the above embodiment, and has the characteristics of high filling rate, good heat exchange effect, and high production efficiency. Of course, the rotary kiln provided in this embodiment also has other effects related to the partition device provided in the above embodiment, which will not be repeated here.

[0044] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0045] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A partition device for a rotary kiln, characterized in that: The rotary kiln comprises a partition row, wherein the partition row comprises a plurality of partitions sequentially arranged along the axial direction of the rotary drum in the rotary kiln, wherein the plate surface of each partition is parallel to the axial direction of the rotary drum; and protruding ribs are respectively provided on both sides of the plate surface of the partition; In the partition rows, adjacent partitions have a partition gap of a preset size between them; there are multiple partition rows, and the first ends of the partition rows are respectively fixed to the inner wall of the rotary drum along the axial direction, and the second ends of the partition rows are respectively fixedly connected to each other; In the partition row, at least some of the partitions are provided with leakage holes; The partition gaps of any partition row and the partition gaps of the adjacent partition rows are staggered; The partition rows are evenly distributed along the circumferential direction.

2. The partition device according to claim 1, characterized in that The second end of each partition row is located at the central axis of the rotary drum, and the plate surface of each partition in each partition row is parallel to the radial direction of the rotary drum.

3. The partition device according to claim 1, characterized in that There are 4 rows of partitions.

4. The partition device according to claim 1, 2 or 3, characterized in that All of the partition rows form an integral structure.

5. The partition device according to claim 4, characterized in that The integrated structure is integrally sintered from SiC.

6. A rotary kiln comprising a rotary drum, characterized in that: It also includes a partition device, which is the partition device described in any one of claims 1-5; two adjacent rows of partitions in the partition device and the inner wall of the rotating drum between the two rows of partitions form a material space with a fan-shaped cross-section.

7. The rotary kiln according to claim 6, characterized in that The refractory lining layer of the rotary drum is provided with a slot, and the partition row is inserted and fixed in the slot.

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