Rotary kiln

Abstract

The utility model provides a rotary kiln. A sealing structure is arranged at a kiln head and / or a kiln tail of the rotary kiln. According to the sealing structure, Z-shaped sealing with sealing faces in different directions is formed through the sealing ring and the annular blocking base, and air leakage caused by relative displacement between the kiln body and the kiln head and the kiln tail in the rotating process is relieved; the Z-shaped seal has a larger sealing area, and the sealing performance is further improved by matching the Z-shaped seal with the elastic ferrule which is in lap joint with the annular baffle seat; furthermore, the sealing structures are arranged on the inner side of the kiln head and / or the inner side of the kiln tail respectively, the sealing ring, the annular blocking base, the elastic ferrule and the inner side of the kiln head and / or the inner side of the kiln tail define the cavity, positive pressure can be kept in the cavity under the condition of high temperature, and external air is prevented from entering the kiln body to oxidize materials. The cavity can further communicate with an air inlet pipeline, inert gas is introduced into the cavity to be used for enhancing air isolation or cooling the sealing structure, and the service life of the sealing structure is prolonged.

Description

Technical Field

[0001] This utility model belongs to the technical field of heating equipment, and specifically relates to a rotary kiln. Background Technology

[0002] Rotary kilns are commonly used in many production industries, including building materials, metallurgy, chemicals, and environmental protection, for drying and roasting materials, such as calcining cement raw materials, lead-zinc volatilization roasting, and drying copper-containing sludge. When processing materials with high processing requirements, such as in the preparation of new energy materials, protective heating in the absence of air is necessary to prevent oxidation and contamination during the heating process. Therefore, the kiln body needs to be sealed. During operation, the kiln body rotates and connects with the kiln head and kiln tail. Therefore, while sealing the kiln body, it is also necessary to ensure smooth rotational connections between all components. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a rotary kiln that, by setting a unique sealing structure between the kiln body and the kiln head and / or kiln tail, enables the rotary kiln to have good sealing performance when the rotation of the kiln body is unimpeded.

[0004] The rotary kiln provided by this utility model includes a kiln body, a kiln head, a kiln tail, and a sealing structure. The kiln head and the kiln tail are rotatably connected to the kiln body, and the kiln body and the kiln head and / or the kiln body and the kiln tail are connected through the sealing structure.

[0005] The sealing structure includes an annular stop, a sealing ring, and an elastic collar;

[0006] The annular baffle is disposed on the outer peripheral wall of the end of the rotary kiln;

[0007] One end of the sealing ring along the axial direction is connected to the kiln head and / or the kiln tail respectively, and the other end is provided with an annular groove. The inner wall of the sealing ring is matched and sleeved with the outer peripheral wall of the kiln body, and the annular groove is matched and connected with the annular stop.

[0008] The outer ring of the elastic collar is connected to the kiln head and / or the kiln tail respectively, and the inner ring of the elastic collar is matched and overlapped with the annular stop.

[0009] Furthermore, the annular baffle is integrally formed with the kiln body.

[0010] Furthermore, the sealing ring is detachably connected to the kiln head and / or to the kiln tail.

[0011] Furthermore, the elastic collar is detachably connected to the kiln head and / or to the kiln tail.

[0012] Furthermore, the sealing ring is made of graphite.

[0013] Furthermore, the elastic collar is made of rubber.

[0014] Furthermore, the sealing structure is disposed inside the kiln head and / or the kiln tail, and the sealing ring, the annular stop, and the elastic sleeve together with the kiln head and / or the inner sides of the sealing ring, the annular stop, and the elastic sleeve together with the kiln tail form a cavity.

[0015] Furthermore, the kiln head and / or the kiln tail are provided with air inlet pipes, the air inlet pipes are connected to the chamber, and the air inlet pipes are provided with control valves.

[0016] This utility model has the following beneficial effects:

[0017] 1) The rotary kiln provided by this utility model is equipped with a sealing structure at the kiln head and / or kiln tail. The sealing structure forms a Z-shaped seal with the sealing ring and the annular baffle. The Z-shaped seal has sealing surfaces in different directions, which reduces the possibility of air leakage caused by the relative movement of the kiln body with the kiln head and kiln tail during the rotation process. At the same time, the sealing area is larger than that of the traditional flat sealing surface. With the elastic ring that overlaps with the annular baffle, the sealing performance is further improved.

[0018] 2) The sealing ring of the sealing structure is made of graphite, which lubricates the sealing area and does not hinder the rotational connection between the kiln body and the kiln head and kiln tail. It also has the advantages of high temperature resistance, oxidation resistance, low friction coefficient, wear resistance and low thermal expansion coefficient, reducing gas leakage when the kiln body is heated at high temperature; the elastic ring is made of rubber, which has the advantages of high temperature resistance, oxidation resistance and long service life.

[0019] 3) The sealing structure is set inside the kiln head and kiln tail respectively. The sealing ring, the annular baffle and the elastic collar are respectively enclosed with the inner side of the kiln head and kiln tail to form a chamber. Under high temperature, the chamber can maintain positive pressure to prevent outside air from entering the kiln body oxide material. Furthermore, the chamber is connected to the air inlet pipe to introduce inert gas into the chamber, which can enhance air isolation and cool the sealing structure to extend the service life of the sealing structure.

[0020] 4) The sealing ring and elastic collar are detachably connected to the kiln head and / or kiln tail respectively, which facilitates maintenance and replacement. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the kiln head of a rotary kiln provided in some embodiments of this utility model.

[0022] Figure 2 This is a schematic diagram of the kiln tail of a rotary kiln provided in some embodiments of this utility model.

[0023] Explanation of reference numerals in the attached figures:

[0024] 001 - Kiln head, 002 - Kiln tail, 003 - Kiln body

[0025] 100, 200 - Sealed structure,

[0026] 110, 210 - Annular stop,

[0027] 120, 220 - Sealing rings,

[0028] 130, 230 - Elastic rings,

[0029] 140, 240 - chambers

[0030] 141, 241 - Intake pipes. Detailed Implementation

[0031] To more clearly and completely describe the technical solution of this utility model, the following detailed description is provided through specific embodiments. It should be understood that the specific embodiments described herein are only for explaining this utility model and are not intended to limit this utility model. Various changes can be made within the scope of the claims of this utility model.

[0032] In the description of this utility model, it should be noted that the terms "inner," "outer," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The term "and / or" as used herein includes any and all combinations of one or more of the related listed items.

[0033] like Figure 1 and Figure 2As shown, the rotary kiln in this embodiment includes a kiln body 003 and a kiln head 001 and a kiln tail 002 disposed at both ends of the kiln body 003. The kiln body 003 is rotatably connected to the kiln head 001 and the kiln tail 002. The rotary kiln includes two sets of sealing structures 100 and 200, which are disposed opposite to each other at both ends of the kiln body 003 and are respectively matched and connected to the kiln head 001 and the kiln tail 002. The sealing structures 100 and 200 include annular baffles 110 and 210, sealing rings 120 and 220, and elastic collars 130 and 230. The annular baffles 110 and 210... 10 is set on the outer perimeter wall at both ends of the kiln body 003; one end of the sealing rings 120 and 220 along the axial direction is connected to the kiln head 001 and the kiln tail 002 respectively, and the other end is provided with annular grooves 121 and 221. The inner wall of the sealing rings 120 and 220 matches and sleeves with the outer perimeter wall of the kiln body 003, and the annular grooves 121 and 221 match and connect with the annular baffles 110 and 210; the outer rings of the elastic collars 130 and 230 are connected to the kiln head 001 and the kiln tail 002 respectively, and the inner rings of the elastic collars 130 and 230 match and overlap with the annular baffles 110 and 210. The sealing rings 120 and 220, together with the annular baffles 110 and 210, form a Z-shaped seal. This Z-shaped seal has sealing surfaces in different directions, reducing the possibility of air leakage caused by the relative movement of the kiln body 003 with the kiln head 001 and kiln tail 002 during rotation. It also has a larger sealing area than traditional flat sealing surfaces. Combined with the elastic collars 130 and 230 that overlap with the annular baffles 110 and 210, the sealing performance is further improved. Furthermore, the sealing rings 120 and 220 are made of graphite. Graphite sealing rings have self-lubricating properties, reducing friction when rotating with the kiln body 003. This provides a seal while preventing obstruction of the rotational connection between the kiln body 003 and the kiln head 001 and kiln tail 002. They also have advantages such as high temperature and oxidation resistance, low friction coefficient, wear resistance, and low coefficient of thermal expansion, reducing gas leakage during high-temperature heating of the kiln. The elastic collars 130 and 230 are made of rubber, which has the advantages of high temperature and oxidation resistance and a long service life.

[0034] In some other embodiments provided by this utility model, the annular baffles 110 and 210 are integrally formed with the kiln body 003 to avoid air leakage caused by gaps between the annular baffles 110 and 210 and the kiln body 003.

[0035] In other embodiments of this utility model, sealing structures 100 and 200 are respectively disposed inside the kiln head 001 and kiln tail 002. Sealing rings 120 and 220, annular baffles 110 and 210, and elastic collars 130 and 230 respectively enclose the inner sides of the kiln head 001 and kiln tail 002 to form chambers 140 and 240. When the kiln body is heated at high temperature, positive pressure can be maintained in chambers 140 and 240 to prevent outside air from entering the material in the oxidation furnace inside the kiln body 003. Preferably, the kiln head 001 and kiln tail 002 are respectively provided with air inlet pipes 141 and 241 connecting chambers 140 and 240. Control valves are provided on the air inlet pipes 141 and 241 to introduce inert gas into chambers 140 and 240 through the air inlet pipes 141 and 241, further enhancing the air isolation performance of sealing structures 100 and 200.

[0036] In some other embodiments provided by this utility model, sealing rings 120 and 220 are detachably connected to the kiln head 001 and the kiln tail 002 respectively; elastic collars 130 and 230 are detachably connected to the kiln head 001 and the kiln tail 002 respectively, which facilitates the repair and replacement of damaged sealing rings 120 and 220 and elastic collars 130 and 230.

[0037] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. A rotary kiln, comprising a kiln body, a kiln head, a kiln tail, and a sealing structure, wherein the kiln head and the kiln tail are rotatably connected to the kiln body, and the kiln body is connected to the kiln head and / or the kiln body to the kiln tail via the sealing structure; characterized in that: The sealing structure includes an annular stop, a sealing ring, and an elastic collar; The annular baffle is disposed on the outer peripheral wall of the end of the kiln body; One end of the sealing ring along the axial direction is connected to the kiln head and / or the kiln tail, and the other end is provided with an annular groove. The inner wall of the sealing ring is matched and sleeved with the outer peripheral wall of the kiln body, and the annular groove is matched and connected with the annular stop. The outer ring of the elastic collar connects to the kiln head and / or the kiln tail, and the inner ring of the elastic collar matches and overlaps with the annular stop.

2. The rotary kiln according to claim 1, characterized in that, The annular baffle is integrally formed with the kiln body.

3. The rotary kiln according to claim 1, characterized in that, The sealing ring is detachably connected to the kiln head and / or to the kiln tail.

4. The rotary kiln according to claim 1, characterized in that, The elastic collar is detachably connected to the kiln head and / or the kiln tail.

5. The rotary kiln according to claim 1, characterized in that, The sealing ring is made of graphite.

6. The rotary kiln according to claim 1, characterized in that, The elastic collar is made of rubber.

7. The rotary kiln according to any one of claims 1-6, characterized in that, The sealing structure is disposed on the inner side of the kiln head and / or the kiln tail, and the sealing ring, the annular stop and the elastic collar together with the kiln head and / or the inner side of the sealing ring, the annular stop and the elastic collar together with the kiln tail to form a cavity.

8. The rotary kiln according to claim 7, characterized in that, The kiln head and / or the kiln tail are provided with air inlet pipes, which are connected to the chamber, and the air inlet pipes are provided with control valves.

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