Sealing structure for waste aluminum recycling equipment - paint stripping kiln

Abstract

A sealing structure suitable for a waste aluminum recycling device - paint stripping kiln, is arranged between the kiln body and the kiln inlet cover and the kiln body and the kiln outlet cover; It comprises a sealing scale plate fixing piece, a reinforcing plate, a sealing plate, a sealing scale plate, a heat insulation layer and a sealing fastening device; The sealing scale plate fixing piece is annularly arranged on the kiln inlet cover and the outlet cover by welding, and is used for installing and fixing the sealing scale plate; The reinforcing plate is welded on the kiln body, used for reinforcing the kiln body, and rotates with the kiln body; One end of the sealing scale plate is fixed on the sealing scale plate fixing piece, and the other end is fixedly connected with a plurality of sealing plates, and the sealing plates have gaps between them; Under the elastic compression of the sealing scale plate, the sealing plate is in contact with the outer circumferential surface of the reinforcing plate and forms a contact type sealing structure; The sealing scale plate is provided with two layers, and the heat insulation layer is arranged between the two layers of sealing scale plates; The sealing fastening device is arranged outside the outer sealing scale plate, and is used for improving the compression force of the sealing scale plate on the sealing plate.

Description

Technical Field

[0001] This utility model relates to a sealing structure, and more particularly to a sealing structure suitable for waste aluminum recycling equipment - paint stripping kiln. Background Technology

[0002] In response to the national goals of achieving carbon peaking and carbon neutrality and realizing resource recycling, the recycled aluminum industry has developed rapidly in recent years. To promote the healthy and sustainable development of the recycled aluminum industry, while improving resource utilization, higher requirements are also being placed on the quality of recycled aluminum products and environmental protection.

[0003] In the recycling and reuse of aluminum scrap, paint removal is a crucial step in improving recycling rates and reducing harmful emissions. Paint removal in a rotary kiln is divided into two stages. The first stage involves converting volatile organic compounds (VOCs) on the scrap surface into a gaseous state, releasing them from the scrap surface. This process requires low temperatures and low oxygen content, without the need for combustion within the kiln. The second stage removes carbon-based deposits remaining on the scrap surface. To remove carbon, some free oxygen in the atmosphere at the kiln's exhaust end must be used to convert the carbon into carbon monoxide. This process requires oxygen and higher temperatures to achieve optimal results. Throughout the process, the paint removal kiln must operate under a slight negative pressure to ensure that process gases remain within the system and to minimize air infiltration into the drum. Sealing at both ends of the kiln body is particularly important to prevent excessive air intake.

[0004] Traditional sealing structures consist of a single layer of sealing plates, which are weak, lack heat insulation, are easily damaged and deformed, and have poor sealing performance. Utility Model Content

[0005] The purpose of this utility model is to overcome the defects of the existing technology and provide a sealing structure with double-layer sealing scale plate and heat insulation layer, which has the advantages of high strength, good heat insulation effect, not easy to be damaged or deformed, and good sealing effect.

[0006] The technical solution of this utility model is as follows:

[0007] A sealing structure suitable for waste aluminum recycling equipment - paint stripping kiln, the sealing structure is set between the kiln body and the kiln inlet mask and between the kiln body and the kiln outlet mask, the sealing structure includes sealing scale plate fixing parts, reinforcing plates, sealing plates, sealing scale plates, heat insulation layers and sealing fastening devices.

[0008] The sealing scale plate fastener is welded around the kiln inlet and outlet masks to install and fix the sealing scale plate.

[0009] The reinforcing plate is welded to the kiln body to strengthen the kiln body and rotates together with the kiln body.

[0010] One end of the sealing scale plate is fixed to the sealing scale plate fixing member, and the other end is fixedly connected to a plurality of sealing plates. There is a gap between adjacent sealing plates. Under the elastic pressing action of the sealing scale plate, the plurality of sealing plates come into contact with the outer circumferential surface of the reinforcing plate and form a contact sealing structure.

[0011] The sealing scale plate is configured as two layers, with a heat insulation layer sandwiched between the two layers of sealing scale plate;

[0012] The sealing fastening device surrounds the outer side of the outer sealing scale plate and is used to increase the clamping force of the sealing scale plate on the sealing plate.

[0013] Furthermore, the heat insulation layer is ceramic fiber cloth.

[0014] Furthermore, the sealing and fastening device includes a spring, a steel wire rope, and a lead screw adjustment mechanism, wherein the spring is fixedly connected to both ends of the lead screw adjustment mechanism, and both ends of the steel wire rope are respectively hung on the spring.

[0015] Furthermore, the lead screw adjustment mechanism includes connecting parts with lead screws at both ends and threaded tubes that are threadedly connected to the lead screws of the connecting parts respectively. Rotating the threaded tubes can make the connecting parts approach or move away from each other.

[0016] Furthermore, the sealing scale plate is connected to the sealing scale plate fixing component and the sealing plate by bolts.

[0017] Furthermore, a sealing scale pressure strip is provided between the sealing scale and the bolt.

[0018] Furthermore, the hardness of the sealing plate is lower than that of the reinforcing plate, so that when the kiln body rotates, the frictional loss between the sealing plate and the reinforcing plate acts on the sealing plate.

[0019] The present invention, by adopting the above technical solution, can achieve the following beneficial effects:

[0020] This utility model adopts a double-layer sealing scale plate plus heat insulation layer sealing structure, which has the advantages of high strength, good heat insulation effect, not easy to be damaged or deformed, and good sealing effect. In addition, since the hardness of the sealing plate is lower than that of the reinforcing plate, the friction loss between the sealing plate and the reinforcing plate acts on the sealing plate when the kiln body rotates, and the sealing plate is easy to maintain and replace. Attached Figure Description

[0021] Figure 1 A schematic diagram showing the connection between the sealing structure, the kiln inlet mask, and the kiln body;

[0022] Figure 2 This is a side view schematic diagram of the sealed structure;

[0023] Figure 3This is a schematic diagram of the sealing and fastening device.

[0024] Figure 4 This is a schematic diagram showing the overall connection of the sealing structure, the kiln inlet mask, the kiln body, and the sealing fastening device.

[0025] In the figure, 1-kiln body; 2-kiln inlet mask; 3-sealing scale plate fastener; 4-reinforcing plate; 5-sealing plate; 6-sealing scale plate; 7-heat insulation layer; 8-sealing fastening device; 9-sealing scale plate pressure strip; 81-spring; 82-steel wire rope; 83-connecting part; 84-threaded pipe. Detailed Implementation

[0026] Please see Figure 1 , Figure 2 and Figure 4 As shown. Since the sealing structure is completely identical to the connection between the kiln inlet mask 2 and the kiln body 1 and the kiln outlet mask, therefore... Figure 1 and Figure 4 The connection between the sealing structure and the kiln-entry mask 2 is taken as an example;

[0027] A sealing structure suitable for waste aluminum recycling equipment - paint stripping kiln. The sealing structure is set between the kiln body 1 and the kiln inlet mask 2 and between the kiln body 1 and the kiln outlet mask. The kiln body 1 is a cylindrical structure. The sealing structure includes a sealing scale plate fixing component 3, a reinforcing plate 4, a sealing plate 5, a sealing scale plate 6, a heat insulation layer 7, and a sealing fastening device 8.

[0028] The sealing scale plate fastener 3 is welded around the kiln inlet mask 2 and the outlet mask to install and fix the sealing scale plate 6.

[0029] The reinforcing plate 4 is welded to the kiln body 1 to reinforce the kiln body 1 and rotates together with the kiln body 1.

[0030] The sealing scale plate 6 is a cylindrical component with open ends and an inwardly recessed middle, formed by stacking multiple elastic sealing scales in a fish-scale pattern and fixing them with bolts. It should be noted that the sealing scales are commercially available, and it should be understood that the sealing scale plate 6 formed by them is also elastic as a whole. The inner circumference of the opening at one end of the sealing scale plate 6 is fixed to the sealing scale plate fixing member 3, and the inner circumference of the opening at the other end is fixedly connected to multiple sealing plates 5. There is a gap between adjacent sealing plates 5, and the multiple sealing plates 5, under the elastic compression of the sealing scale plate 6, come into contact with the outer circumference of the reinforcing plate 4 and form a contact sealing structure.

[0031] The sealing fastening device 8 surrounds the outer side of the outer sealing scale plate 6. The bolts on the sealing scale plate 6 used to connect the sealing scales can limit the position of the sealing fastening device 8. The sealing fastening device 8 is used to increase the clamping force of the sealing scale plate 6 on the sealing plate 5 and improve the sealing effect between the sealing plate 5 and the reinforcing plate 4. Therefore, the tightness of the sealing fastening device 8 itself can be adjusted.

[0032] In this embodiment, the sealing scale plate 6 is configured as two layers, with a heat insulation layer 7 sandwiched between the two layers. The heat insulation layer 7 is preferably made of 2mm thick ceramic fiber cloth, but it is not limited to this and other heat insulation materials with high temperature resistance can also be used. By setting two layers of sealing scale plates 6, the strength of the sealing structure can be improved. By setting the heat insulation layer 7, the heat insulation effect can be improved and the temperature of the outer sealing scale plate 6 can be reduced. In addition, the sealing scale plate 6 is connected to the sealing scale plate fixing member 3 and the sealing plate 5 by bolts. The bolt connection facilitates installation and maintenance.

[0033] like Figure 3 As shown, the sealing and fastening device 8 specifically includes a spring 81, a steel wire rope 82, and a lead screw adjustment mechanism, wherein the spring 81 is fixedly connected to both ends of the lead screw adjustment mechanism, and both ends of the steel wire rope 82 are respectively hung on the spring 81.

[0034] The lead screw adjustment mechanism includes connecting parts 83 with lead screws at both ends and threaded tubes 84 that are threadedly connected to the lead screws of the connecting parts. Rotating the threaded tubes 84 can make the connecting parts 83 approach or move away from each other, thereby the spring 81 drives the wire rope 82 to tighten or loosen. Since the sealing plate 6 itself has a certain elasticity, the sealing plate 5 can move up and down in the radial direction of the kiln body 1. Under the action of the wire rope 82, the sealing plate 6 makes the sealing plate 5 fit with the reinforcing plate 4, and allows the sealing plate 5 to move up and down in the radial direction of the kiln body.

[0035] During operation, the flue gas temperature at the inlet side of the paint stripping material is approximately 350℃, and the flue gas temperature at the outlet side is approximately 550℃. The kiln is under a slight negative pressure of -8Pa to -10Pa, ensuring stable flue gas flow and effectively preventing heat loss and leakage, thus guaranteeing paint stripping efficiency and environmental safety. The kiln body 1 rotates at 2.3 rpm. The reinforcing plate 4 contacts and rubs against the sealing plate 5, creating a seal. It should be noted that the sealing plate 5 should ideally be made of a softer material, with a lower hardness than the reinforcing plate 4, so that during kiln body 1 rotation, the frictional wear between the sealing plate 5 and the reinforcing plate 4 primarily occurs on the sealing plate 5. This design is primarily to facilitate easier replacement of the sealing plate 5. To facilitate the replacement of the sealing plate 5 and the maintenance of the sealing mechanism, the sealing scale plate 6 is bolted to the sealing scale plate fixing part 3 and the sealing plate 5. In order to improve the stability of the connection between the sealing scale plate 6 and the sealing scale plate fixing part 3, a sealing scale plate pressure strip 9 is provided between the sealing scale plate 6 and the bolt. It can be understood that the sealing scale plate pressure strip 9 is a gasket that increases the working area of ​​the bolt.

[0036] The kiln inlet mask 2 and kiln outlet mask of this utility model are fixed devices. A sealing scale plate fixing component 3 is installed on the kiln inlet mask 2 and kiln outlet mask. Sealing scale plates 6 and sealing scale plate pressure strips 9 are installed on the sealing scale plate fixing component 3. A heat insulation layer 7 is sandwiched between two layers of sealing scale plates 6. A sealing plate 5 is installed at the end of the sealing scale plates 6. A reinforcing plate 4 is welded to the kiln body 1. The kiln body 1 rotates at a speed of 2.3 rpm. The reinforcing plate 4 contacts the sealing plate 5 and has relative movement, forming a sealing effect. The sealing plate 5 will wear down; if excessive wear occurs after prolonged use, it can be replaced. The sealing scale plates 6 are elastic; when the kiln body 1 rotates, this elasticity allows the sealing plate 5 to undulate along the radial direction of the kiln body, ensuring close contact with the reinforcing plate 4. The sealing scale plates 6 are stacked together in a fish-scale pattern, with a ceramic fiber cloth heat insulation layer 7 sandwiched in between, which can achieve both sealing and heat insulation functions. The sealing scale plate 6 is externally sealed by a sealing fastening device 8, which adopts a steel wire rope and spring structure. This structure has the same elastic effect as the sealing scale plate 6, resulting in good sealing and heat insulation of the entire sealing structure. The bolted connections of each component facilitate replacement and maintenance.

[0037] It should be noted that those skilled in the art know that all so-called sealing is relative. Therefore, the sealing structure provided by this utility model is not an absolute seal. It only has better strength and a better sealing effect compared to the sealing structure of the prior art. The leakage can be controlled within the range that meets the production requirements.

[0038] The above description is only a preferred embodiment of the present utility model. Any equivalent substitutions and modifications made by those skilled in the art without departing from the guidance of the present utility model shall be deemed to fall within the protection scope of the present utility model.

Claims

1. A sealing structure suitable for a waste aluminum recycling equipment - a paint stripping kiln, wherein the sealing structure is disposed between the kiln body and the kiln inlet mask and between the kiln body and the kiln outlet mask, characterized in that: The sealing structure includes a sealing scale plate fixing component, a reinforcing plate, a sealing plate, a sealing scale plate, a heat insulation layer, and a sealing fastening device; The sealing scale plate fastener is welded around the kiln inlet and outlet masks to install and fix the sealing scale plate. The reinforcing plate is welded to the kiln body to strengthen the kiln body and rotates together with the kiln body. One end of the sealing scale plate is fixed to the sealing scale plate fixing member, and the other end is fixedly connected to a plurality of sealing plates. There is a gap between adjacent sealing plates. Under the elastic pressing action of the sealing scale plate, the plurality of sealing plates come into contact with the outer circumferential surface of the reinforcing plate and form a contact sealing structure. The sealing scale plate is configured as two layers, with a heat insulation layer sandwiched between the two layers of sealing scale plate; The sealing fastening device surrounds the outer side of the outer sealing scale plate and is used to increase the clamping force of the sealing scale plate on the sealing plate.

2. The sealing structure applicable to waste aluminum recycling equipment - paint stripping kiln according to claim 1, characterized in that: The heat insulation layer is ceramic fiber cloth.

3. The sealing structure applicable to waste aluminum recycling equipment - paint stripping kiln according to claim 1, characterized in that: The sealing and fastening device includes a spring, a steel wire rope, and a lead screw adjustment mechanism, wherein the spring is fixedly connected to both ends of the lead screw adjustment mechanism, and both ends of the steel wire rope are respectively hung on the spring.

4. The sealing structure applicable to waste aluminum recycling equipment - paint stripping kiln according to claim 3, characterized in that: The lead screw adjustment mechanism includes connecting parts with lead screws at both ends and threaded tubes that are threadedly connected to the lead screws at the connecting parts. Rotating the threaded tubes can make the connecting parts approach or move away from each other.

5. The sealing structure applicable to waste aluminum recycling equipment - paint stripping kiln according to claim 1, characterized in that: The sealing scale plate is connected to the sealing scale plate fastener and the sealing plate by bolts.

6. The sealing structure applicable to waste aluminum recycling equipment - paint stripping kiln according to claim 1, characterized in that: A sealing scale pressure strip is provided between the sealing scale and the bolt.

7. The sealing structure applicable to a paint stripping kiln in waste aluminum recycling equipment according to any one of claims 1-5, characterized in that: The hardness of the sealing plate is lower than that of the reinforcing plate, so that when the kiln body rotates, the frictional loss between the sealing plate and the reinforcing plate acts on the sealing plate.

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