Kiln tail protection structure of rotary kiln

Abstract

The utility model discloses a rotary kiln tail protection structure which comprises a fixing frame, an installation ring is fixedly connected to the end of the fixing frame, a sealing assembly is fixedly assembled on the outer side wall of the installation ring, an assembly cavity is formed in an inner cavity of the fixing frame, and a cooling mechanism is assembled in the assembly cavity. The fixing frame can be cooled through cooling water circularly passing through the cooling mechanism, the temperature of the fixing frame is kept stable in the using process, the situation that the fixing frame deforms due to the high temperature of the kiln tail is avoided, the kiln tail can stably operate in the fixing frame, meanwhile, the sealing performance of the connecting position of the kiln tail and auxiliary equipment is improved, and the service life of the kiln tail is prolonged. And the smoke is prevented from leaking from the joint of the kiln tail and the auxiliary equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of rotary kilns, and particularly relates to a protective structure at the tail of a rotary kiln. Background Technique

[0002] A rotary kiln is a large rotating device widely used in industrial production, mainly used for calcining, drying and roasting various materials. Its working principle is that through the slowly rotating cylinder body, the materials undergo chemical reactions or physical changes at high temperatures, so as to achieve the required production effect. At the tail of the rotary kiln, it is necessary to be connected to external auxiliary equipment (usually referring to equipment such as material conveying or flue gas treatment), for supplying materials into the rotary kiln from the tail of the kiln or discharging the flue gas generated during the production process of the rotary kiln. Therefore, it is necessary to set a protective structure at the connection between the tail of the kiln and the auxiliary equipment. Through the set protective structure, the connection between the tail of the kiln and the auxiliary equipment can be ensured to be stable, and the connection between the tail of the kiln and the auxiliary equipment can be sealed to avoid the leakage of flue gas from the connection. During the use of the existing protective structure, due to being affected by the high-temperature state of the tail of the kiln for a long time, the protective structure is very easy to deform. The deformed protective structure will not only affect the operation and rotation of the tail of the kiln, but also cause the leakage of flue gas at the connection, affecting the surrounding environment. For this reason, we propose a protective structure at the tail of a rotary kiln. Content of the Utility Model

[0003] The purpose of the utility model is to provide a protective structure at the tail of a rotary kiln to solve the problems raised in the above background technique.

[0004] To achieve the above purpose, the utility model provides the following technical solution: A protective structure at the tail of a rotary kiln, including a fixed frame, an installation ring is fixedly connected to the end of the fixed frame, a sealing assembly is fixedly assembled on the outer side wall of the installation ring, an assembly cavity is opened in the inner cavity of the fixed frame, and a cooling mechanism is assembled in the assembly cavity;

[0005] The cooling mechanism includes a cooling pipe, the cooling pipe is fixedly assembled in the assembly cavity, and the ends of the cooling pipe are respectively fixedly connected with a water inlet joint and a water outlet joint that penetrate through the assembly cavity.

[0006] Preferably, the number of the cooling pipes is at least two, and the two cooling pipes are arranged oppositely in the assembly cavity.

[0007] Preferably, a heat exchange layer is fixedly assembled in the assembly cavity, the side walls of the heat exchange layer are respectively attached to the side walls of the two cooling pipes, and the cross section of the heat exchange layer is in an "inverted U" shape.

[0008] Preferably, heat conduction rings are uniformly sleeved on the outer side wall of the cooling pipe in a circumferential manner, and heat conduction rods are fixedly connected between the side walls of the heat conduction rings and the side walls of the assembly cavity.

[0009] Preferably, a first fixing plate and a second fixing plate are integrally formed on the side wall of the fixing frame, and a reinforcing block is fixedly assembled between the first fixing plate and the second fixing plate.

[0010] Preferably, the sealing assembly includes a lower sealing layer, a middle sealing layer and an upper sealing layer. The lower sealing layer, the middle sealing layer and the upper sealing layer are circumferentially and uniformly distributed on the side wall of the mounting ring from the inside to the outside. A fixing stud penetrating through the lower sealing layer, the middle sealing layer and the upper sealing layer is fixedly assembled on the side wall of the mounting ring, and a fixing nut is screwed on the outer side wall of the fixing stud.

[0011] Compared with the prior art, the beneficial effect of the present utility model is as follows: for a protective structure at the tail of a rotary kiln, a cooling mechanism is arranged inside the fixing frame. The cooling water circulating inside the cooling mechanism can cool down the fixing frame, keep the temperature of the fixing frame stable during use, avoid deformation of the fixing frame due to the high temperature at the tail of the kiln, enable the tail of the kiln to run smoothly inside the fixing frame, and at the same time improve the sealing performance at the connection between the tail of the kiln and the auxiliary equipment, and avoid leakage of flue gas from the connection between the tail of the kiln and the auxiliary equipment.

[0012] Through the mutual cooperation of the heat exchange layer, the heat conduction ring, the heat conduction rod and other structures in this structure, the heat exchange area between the cooling pipe and the fixing frame is increased, and the cooling effect of the cooling pipe on the fixing frame can be better improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a perspective view of the present utility model.

[0014] Figure 2 is a schematic structural view of the cooling mechanism of the present utility model.

[0015] Figure 3 is a partial sectional view of the present utility model.

[0016] Figure 4 is a rear perspective view of the present utility model.

[0017] Figure 5 is a schematic structural view of the sealing assembly of the present utility model.

[0018] In the figure: 1, fixing frame; 11, first fixing plate; 12, second fixing plate; 13, reinforcing block; 2, mounting ring; 3, sealing assembly; 31, lower sealing layer; 32, middle sealing layer; 33, upper sealing layer; 34, fixing stud; 35, fixing nut; 4, assembly cavity; 5, cooling mechanism; 51, cooling pipe; 52, water inlet joint; 53, water outlet joint; 54, heat exchange layer; 55, heat conduction ring; 56, heat conduction rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model.

[0020] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 , the present utility model provides a technical solution: a protective structure at the tail of a rotary kiln, including a fixed frame 1. The fixed frame 1 is annular. One end of the fixed frame 1 is fixedly connected to the auxiliary equipment at the tail of the rotary kiln, and the other end is integrally formed with an installation ring 2. Sealing components 3 are fixedly assembled on the side wall of the installation ring 2 at circumferential intervals. The installation ring 2 is used to connect to the tail of the rotary kiln. By setting the sealing components 3, the tail of the rotary kiln is sealed, avoiding the leakage of soot from the connection between the installation ring 2 and the tail of the kiln during the calcination of materials in the rotary kiln.

[0021] As Figure 2 and Figure 3 stated, an annular assembly cavity 4 is provided in the inner cavity of the fixed frame 1, and a cooling mechanism 5 is assembled in the assembly cavity 4. By setting the cooling mechanism 5, the fixed frame 1 can be cooled and its temperature can be reduced, maintaining the stability of the fixed frame 1 during use, and avoiding deformation due to the fixed frame 1 being subjected to excessive heat for a long time, thereby affecting the connection with the tail of the rotary kiln and the sealing of the tail of the kiln.

[0022] The cooling mechanism 5 includes cooling pipes 51. The cooling pipes 51 are annularly distributed in the assembly cavity 4. The two ends of the cooling pipes 51 are respectively fixedly connected to a water inlet joint 52 and a water outlet joint 53 that penetrate the assembly cavity 4 and the fixed frame 1. The water inlet joint 52 is used to connect to an external cooling water supply device, and the water outlet joint 53 is used to connect to an external cooling water circulation and recovery device. By circulating cooling water into the cooling pipes 51, the cooling pipes 51 can exchange heat with the external structure to reduce the temperature. The number of the cooling pipes 51 is at least two, and the two cooling pipes 51 are symmetrically and evenly distributed in the assembly cavity 4 in the front and rear;

[0023] As Figure 3 shown, a heat exchange layer 54 is fixedly assembled in the assembly cavity 4. The cross-section of the heat exchange layer 54 is "concave-shaped". The side walls of the heat exchange layer 54 are respectively attached to the side walls of the assembly cavity 4. The heat exchange layer 54 is cast with a metal material having high temperature resistance and good thermal conductivity. The heat exchange layer 54 is respectively attached to the side walls of the two cooling pipes 51. The cooling pipes 51 complete the cooling and temperature reduction of the fixed frame 1 through the heat exchange layer 54, keeping the structure of the fixed frame 1 stable.

[0024] As Figure 2As shown in the figure, a heat conduction ring 55 is sleeved on the outer side wall of the cooling pipe 51. A heat conduction rod 56 is fixedly connected between the inner side wall of the heat conduction ring 55 and the inner cavity side wall of the assembly cavity 4. Through the cooperation of the heat conduction ring 55 and the heat conduction rod 56, the heat exchange area between the cooling pipe 51 and the fixing frame 1 is further increased, and the cooling effect of the cooling pipe 51 on the fixing frame 1 is enhanced.

[0025] As Figure 1 and Figure 2 As shown in the figure, a first fixing plate 11 and a second fixing plate 12 are integrally formed on the side wall of the fixing frame 1. Reinforcing blocks 13 are uniformly welded and fixed between the first fixing plate 11 and the second fixing plate 12. The first fixing plate 11 is used for the assembly of bolts, so that the fixing frame 1 can be fixedly connected with the auxiliary equipment at the kiln tail. By uniformly fixing and assembling the reinforcing blocks 13 between the first fixing plate 11 and the second fixing plate 12, the overall strength of the fixing frame 1 can be increased, and further deformation during its use can be prevented.

[0026] As Figure 5 As shown in the figure, the sealing assembly 3 includes a lower sealing layer 31, a middle sealing layer 32 and an upper sealing layer 33. The lower sealing layer 31, the middle sealing layer 32 and the upper sealing layer 33 are circumferentially and uniformly distributed on the side wall of the mounting ring 2 from the inside to the outside. A fixing stud 34 passing through the lower sealing layer 31, the middle sealing layer 32 and the upper sealing layer 33 is fixedly welded to the side wall of the mounting ring 2. A fixing nut 35 is screwed on the outer side wall of the fixing stud 34. The lower sealing layer 31, the middle sealing layer 32 and the upper sealing layer 33 are connected and fixed by the fixing nut 35. The lower sealing layer 31 and the upper sealing layer 33 are made of rigid metal materials, and the middle sealing layer 32 is made of flexible high-temperature resistant materials. The middle sealing layer 32 is positioned and fixed through the cooperation of the lower sealing layer 31 and the upper sealing layer 33. With a three-layer sealing design, the sealing effect between the mounting ring 2 and the connection at the kiln tail of the rotary kiln is enhanced.

Claims

1. A rotary kiln tail protection structure, comprising a fixing frame (1), characterized in that: The end of the fixing frame (1) is fixedly connected to a mounting ring (2), the outer wall of the mounting ring (2) is fixedly mounted with a sealing assembly (3), the inner cavity of the fixing frame (1) is provided with an assembly cavity (4), and a cooling mechanism (5) is mounted in the assembly cavity (4); The cooling mechanism (5) comprises a cooling pipe (51), the cooling pipe (51) being fixedly assembled in the assembly cavity (4), and the ends of the cooling pipe (51) being respectively fixedly connected with a water inlet joint (52) and a water outlet joint (53) penetrating the assembly cavity (4).

2. A rotary kiln tail protection structure according to claim 1, characterized in that: The number of the cooling pipes (51) is at least two, and the two cooling pipes (51) are arranged opposite to each other in the assembly cavity (4).

3. A rotary kiln tail protection structure according to claim 2, characterized in that: A heat exchange layer (54) is fixedly mounted in the assembly cavity (4), the side walls of the heat exchange layer (54) respectively fit with the side walls of the two cooling pipes (51), and the cross section of the heat exchange layer (54) is in a "concave" shape.

4. A rotary kiln tail protection structure according to claim 1, characterized in that: The outer wall of the cooling tube (51) is evenly sleeved with a heat-conducting ring (55) in a circumferential manner, and a heat-conducting rod (56) is fixedly connected between the side wall of the heat-conducting ring (55) and the side wall of the assembly cavity (4).

5. The rotary kiln tail protection structure according to claim 1, characterized in that: A first fixing plate (11) and a second fixing plate (12) are integrally formed on the side wall of the fixing frame (1), and a reinforcing block (13) is fixedly mounted between the first fixing plate (11) and the second fixing plate (12).

6. The rotary kiln tail protection structure according to claim 1, characterized in that: The sealing assembly (3) comprises a lower sealing layer (31), a middle sealing layer (32) and an upper sealing layer (33); the lower sealing layer (31), the middle sealing layer (32) and the upper sealing layer (33) are evenly distributed on the side wall of the mounting ring (2) from the inside to the outside in a circumferential manner; the side wall of the mounting ring (2) is fixedly equipped with a fixing stud (34) that penetrates the lower sealing layer (31), the middle sealing layer (32) and the upper sealing layer (33); and the outer side wall of the fixing stud (34) is threadedly connected with a fixing nut (35).

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