Rotary kiln sealing device and rotary kiln
By setting buffer and sealing components between the rotary kiln body and the kiln hood to form a buffer chamber and monitor the air pressure, the problem of difficult air leakage detection in the sealing structure is solved, achieving highly sensitive sealing monitoring and reducing energy and electricity consumption.
Patent Information
- Application Number
- CN202520096113.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-16
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-01-16
AI Technical Summary
The existing rotary kiln sealing structure makes it difficult to effectively monitor the sealing performance, leading to air leakage, which affects the combustion temperature and heat exchange efficiency, and increases energy and electricity consumption.
A buffer assembly and a sealing assembly are installed between the kiln body and the kiln hood to form a buffer cavity, which is connected to the inside of the kiln hood through a vent. An air pressure detection assembly is equipped to monitor the air pressure in the buffer cavity, and the damping effect of the buffer cavity is used to improve the sensitivity of air leakage detection.
High-sensitivity monitoring of the overall sealing performance of sealing components can be achieved using a small number of air pressure testing devices, reducing energy and power consumption.
Smart Images
Figure CN223896546U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of environmental protection equipment technology, specifically relating to a rotary kiln sealing device and a rotary kiln. Background Technology
[0002] Hazardous waste mainly refers to waste discharged during industrial production processes. Its harmful consequences are cumulative, delayed, and long-term. Currently, the most commonly used physical method for treating solid waste is high-temperature incineration. Rotary kiln incinerators are widely used for waste combustion. A rotary kiln mainly consists of a kiln head, kiln body, kiln tail, and support frame. The kiln body is the main body of the rotary kiln, cylindrical in shape, with several rolling rings in the middle. It is set slightly inclined to the horizontal, rotating slowly while transferring the waste supplied from the top to the bottom, and supplying an equal amount of air from the front or rear for combustion.
[0003] The gaps between the high-speed rotating kiln body and the stationary kiln head and tail are unavoidable when moving and stationary objects are connected. If these gaps are not properly sealed, cold air will leak into the kiln under the suction force of the powerful exhaust fan. This will reduce the combustion temperature and firing temperature, affecting heat exchange efficiency and product calcination, and increasing energy consumption. In addition, it will increase the amount of smoke emitted from the kiln tail, increasing the load on the exhaust fan and increasing electricity consumption.
[0004] Existing rotary kilns typically employ sealing structures to seal the gaps between the kiln body and the stationary kiln head and tail. However, it is difficult to effectively monitor the sealing performance of these structures.
[0005] If the sealing structure is monitored by using a pressure monitoring component to monitor the internal pressure of the kiln head or kiln tail, it may not be detected if the sealing structure only produces a small amount of air leakage, which is insufficient to affect the overall pressure inside the kiln head or kiln tail. To improve the sensitivity of the monitoring, more pressure detection devices must be installed to monitor the local pressure changes inside the kiln head or kiln tail, but this will greatly increase the cost. Utility Model Content
[0006] This utility model provides a rotary kiln sealing device and a rotary kiln, aiming to solve the technical problems described in the background art above.
[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0008] In a first aspect, embodiments of the present invention provide a rotary kiln sealing device, comprising:
[0009] A buffer assembly is suitable for being installed between the kiln body and the kiln hood. Several ventilation holes are opened on the buffer assembly to connect the two sides of the buffer assembly.
[0010] A sealing assembly, disposed outside the buffer assembly, is adapted to seal against the kiln body and kiln hood. A buffer cavity is formed between the sealing assembly and the buffer assembly, and the buffer cavity communicates with the interior of the kiln hood through the vent hole.
[0011] A pressure detection component is connected to the buffer chamber and is used to monitor the pressure inside the buffer chamber.
[0012] In conjunction with the first aspect, in one possible implementation of the rotary kiln sealing device provided by this utility model, the buffer assembly further includes a plurality of filter elements, each of which corresponds to one of the vent holes. The filter elements are disposed on the vent holes and are used to filter smoke and dust.
[0013] In conjunction with the first aspect, in one possible implementation of the rotary kiln sealing device provided by this utility model, the sealing assembly includes:
[0014] A cover, suitable for surrounding the kiln body, is connected at one end to the kiln cover. The cover has an annular cavity that communicates with the inner side of the cover.
[0015] The floating base is annular and slidably disposed within the annular cavity, having the freedom to slide along the direction perpendicular to the kiln body axis, and protruding inward from the cover;
[0016] The first sealing ring is connected to the floating substrate or the kiln body and is sealed to the floating substrate and the kiln body.
[0017] In conjunction with the first aspect, in one possible implementation of the rotary kiln sealing device provided by this utility model, the buffer assembly includes:
[0018] The first support has one end connected to the floating base and the other end extending between the kiln body and the kiln hood;
[0019] A buffer ring, connected to the first bracket, has sides adapted for sealing with the kiln body and kiln hood, and the buffer ring is provided with several ventilation holes; and
[0020] A first pressure plate is located on the side of the buffer ring facing away from the first bracket and is connected to the first bracket to press the buffer ring onto the first bracket.
[0021] In conjunction with the first aspect, in one possible implementation of the rotary kiln sealing device provided by this utility model, the first support is provided with a first mounting groove at one end facing away from the floating base, and the first mounting groove has a transverse V-shaped structure; the buffer ring has a V-shaped cross section along the axial direction, is embedded in the first mounting groove, and its upper and lower ends abut against the kiln body and the kiln cover.
[0022] In conjunction with the first aspect, in one possible implementation of the rotary kiln sealing device provided by this utility model, the sealing assembly further includes:
[0023] The second support is located on the side of the floating base opposite to the buffer assembly, with one end connected to the floating base;
[0024] The second sealing ring, connected to the second bracket, has sides adapted for sealing cooperation with the kiln body and the cover; and
[0025] The second pressure plate is located on the side of the second sealing ring facing away from the second bracket and is connected to the second bracket to press the second sealing ring onto the second bracket.
[0026] In conjunction with the first aspect, in one possible implementation of the rotary kiln sealing device provided by this utility model, the second bracket is provided with a second mounting groove at one end facing away from the floating base, and the second mounting groove has a transverse V-shaped structure; the cross section of the second sealing ring along the axial direction has a V-shaped structure, is embedded in the second mounting groove, and its upper and lower ends abut against the kiln body and the cover.
[0027] Secondly, this utility model embodiment provides a rotary kiln, including the rotary kiln sealing device described above.
[0028] The beneficial effects of the rotary kiln sealing device provided by this utility model are as follows: Compared with the prior art, the rotary kiln sealing device provided by this utility model has a buffer component and a sealing component arranged sequentially from the inside to the outside between the kiln body and the kiln hood. A buffer cavity is formed between the buffer component and the sealing component, and the buffer cavity is connected to the inside of the kiln hood through a vent hole. The vent hole generates a certain damping, so that when the sealing component leaks air locally, there is enough time to cause a large-scale change in air pressure in the buffer cavity, which can then be detected by the air pressure detection component. Therefore, a small number of air pressure detection devices can be used to complete the monitoring of the overall sealing performance of the sealing component and ensure high sensitivity.
[0029] The beneficial effects of the rotary kiln provided by this utility model are as follows: Compared with the prior art, the rotary kiln provided by this utility model uses the above-mentioned rotary kiln sealing device for sealing. Therefore, a small number of air pressure detection devices can be used to complete the monitoring of the overall sealing performance of the sealing component and ensure high sensitivity. Attached Figure Description
[0030] Figure 1 A partial three-dimensional structural schematic diagram of the rotary kiln provided in an embodiment of this utility model;
[0031] Figure 2 A partial cross-sectional view of the rotary kiln provided in an embodiment of this utility model;
[0032] Figure 3 for Figure 2 Enlarged view of part A in the image;
[0033] Explanation of reference numerals in the attached figures:
[0034] 11. Enclosure; 12. Floating substrate; 13. First sealing ring; 14. Second support;
[0035] 15. Second sealing ring; 16. Second pressure plate; 21. First bracket; 22. Buffer ring;
[0036] 221. Filter element; 23. First pressure plate; 30. Air pressure detection assembly; 41. Kiln body; 42. Kiln hood. Detailed Implementation
[0037] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.
[0038] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. The following description of at least one exemplary embodiment is actually illustrative only and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.
[0039] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0040] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.
[0041] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms 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 on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.
[0042] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways, and the spatial relative descriptions used herein will be interpreted accordingly.
[0043] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.
[0044] Please refer to the following: Figures 1 to 3The rotary kiln sealing device provided by this utility model will now be described. The rotary kiln sealing device includes a buffer assembly, a sealing assembly, and a pressure detection assembly 30. The buffer assembly is suitable for being disposed between the kiln body 41 and the kiln hood 42, and has several vent holes that connect both sides of the buffer assembly. The sealing assembly is disposed outside the buffer assembly and is suitable for sealing with the kiln body 41 and the kiln hood 42. A buffer cavity is formed between the sealing assembly and the buffer assembly, and the buffer cavity is connected to the interior of the kiln hood 42 through the vent holes. The pressure detection assembly 30 is connected to the buffer cavity and is used to monitor the pressure inside the buffer cavity.
[0045] It should be noted that kiln hood 42 refers to the kiln head or kiln tail. The air pressure detection component 30 is an existing air pressure detection device, such as a pressure gauge or pressure sensor, which is connected to the buffer chamber through a pipeline. The air pressure detection component 30 includes several air pressure detection devices.
[0046] Under normal conditions, the buffer chamber is connected to the interior of the kiln hood 42, and the internal pressure is constant. When the sealing component fails, causing air leakage, outside air enters the buffer chamber through the sealing component. Since the buffer chamber only has a small number of vents, the airflow resistance is relatively large. Therefore, the outside air has more time to diffuse within the buffer chamber, resulting in a larger range of pressure changes being detected by the air pressure detection component 30. Thus, a small number of air pressure detection devices are sufficient to ensure high sensitivity.
[0047] The beneficial effects of the rotary kiln sealing device provided by this utility model are as follows: Compared with the prior art, the rotary kiln sealing device provided by this utility model has a buffer component and a sealing component arranged sequentially from the inside to the outside between the kiln body 41 and the kiln hood 42. A buffer cavity is formed between the buffer component and the sealing component, and the buffer cavity is connected to the inside of the kiln hood 42 through a vent hole. A certain damping is generated through the vent hole, so that when the sealing component leaks air locally, there is enough time to cause a large range of air pressure changes in the buffer cavity, which can then be detected by the air pressure detection component 30. Therefore, a small number of air pressure detection devices can be used to complete the monitoring of the overall sealing performance of the sealing component and ensure high sensitivity.
[0048] like Figure 2 and Figure 3 As shown, in a specific embodiment of the rotary kiln sealing device provided in this utility model, the buffer assembly further includes a plurality of filter elements 221, each of which corresponds to a vent hole. The filter elements 221 are disposed on the vent holes and are used to filter smoke and dust.
[0049] Specifically, filter element 221 is a filter screen or filter block, which filters smoke and dust on the one hand, and further increases the airflow resistance on the other hand.
[0050] like Figure 2 and Figure 3As shown, in a specific embodiment of the rotary kiln sealing device provided in this utility model, the sealing assembly includes a cover 11, a floating base 12, and a first sealing ring 13. The cover 11 is adapted to surround the kiln body 41, and one end is connected to the kiln cover 42. The cover 11 has an annular cavity that communicates with the inner side of the cover 11. The floating base 12 is annular and is slidably disposed in the annular cavity. It has the freedom to slide along the axial direction perpendicular to the kiln body 41 and protrudes inward from the cover 11. The first sealing ring 13 is connected to the floating base 12 or the kiln body 41 and is sealed to both the floating base 12 and the kiln body 41.
[0051] It should be noted that due to thermal expansion and contraction, the kiln body 41 may experience radial runout. The floating base 12 is provided so that the first sealing ring 13 and the floating base 12 can follow the radial runout of the kiln body 41, keeping the first sealing ring 13 in close contact with the kiln body 41 and ensuring good sealing performance.
[0052] like Figure 2 and Figure 3 As shown in the embodiment of the rotary kiln sealing device provided in this utility model, the buffer assembly includes a first support 21, a buffer ring 22, and a first pressure plate 23. One end of the first support 21 is connected to the floating base 12, and the other end extends between the kiln body 41 and the kiln hood 42. The buffer ring 22 is connected to the first support 21, and its two sides are adapted to seal with the kiln body 41 and the kiln hood 42. Several ventilation holes are provided on the buffer ring 22. The first pressure plate 23 is located on the side of the buffer ring 22 facing away from the first support 21 and is connected to the first support 21. It is used to press the buffer ring 22 onto the first support 21.
[0053] It should be noted that the first support 21 and the buffer ring 22 can effectively support the floating base 12, and through the sealing cooperation between the buffer ring 22 and the kiln body 41 and the kiln cover 42, the entry of smoke and dust into the buffer chamber can be effectively reduced.
[0054] Specifically, such as Figure 2 and Figure 3 As shown, in a specific embodiment of the rotary kiln sealing device provided in this utility model, the first support 21 is provided with a first mounting groove at one end facing away from the floating base 12. The first mounting groove has a transverse V-shaped structure. The buffer ring 22 has a V-shaped cross section along the axial direction and is embedded in the first mounting groove. The upper and lower ends abut against the kiln body 41 and the kiln cover 42 to ensure that the buffer ring 22 can reliably fit with the kiln body 41 and the kiln cover 42.
[0055] like Figure 2 and Figure 3As shown, in a specific embodiment of the rotary kiln sealing device provided in this utility model, the sealing assembly further includes a second bracket 14, a second sealing ring 15, and a second pressure plate 16. The second bracket 14 is located on the side of the floating base 12 facing away from the buffer assembly, and one end is connected to the floating base 12. The second sealing ring 15 is connected to the second bracket 14, and both sides are adapted to seal with the kiln body 41 and the cover 11. The second pressure plate 16 is located on the side of the second sealing ring 15 facing away from the second bracket 14 and is connected to the second bracket 14, used to press the second sealing ring 15 onto the second bracket 14.
[0056] It should be noted that the buffer ring 22 and the second sealing ring 15 have a certain degree of toughness, which can effectively adapt to the radial runout of the kiln body 41 and maintain a close fit with the kiln body 41.
[0057] Specifically, such as Figure 2 and Figure 3 As shown in a specific embodiment of the rotary kiln sealing device provided in this utility model, the second bracket 14 has a second mounting groove at one end facing away from the floating base 12. The second mounting groove has a transverse V-shaped structure. The second sealing ring 15 has a V-shaped cross-section along the axial direction and is embedded in the second mounting groove. Its upper and lower ends abut against the kiln body 41 and the cover 11, ensuring that the second sealing ring 15 can reliably fit with the kiln body 41 and the cover 11, so as to effectively prevent external dust from entering between the floating base 12 and the cover 11 and ensure service life.
[0058] Based on the same inventive concept, this utility model embodiment provides a rotary kiln, including the rotary kiln sealing device described above.
[0059] Specifically, the rotary kiln sealing device described above is installed at the connection between the kiln head and the kiln body 41, and at the connection between the kiln tail and the kiln body 41. The cover 11 is connected to the kiln head or the kiln tail.
[0060] The beneficial effects of the rotary kiln provided by this utility model are as follows: Compared with the prior art, the rotary kiln provided by this utility model uses the above-mentioned rotary kiln sealing device for sealing. Therefore, a small number of air pressure detection devices can be used to complete the monitoring of the overall sealing performance of the sealing component and ensure high sensitivity.
[0061] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A rotary kiln sealing device, characterized in that, include: A buffer assembly is suitable for being installed between the kiln body and the kiln hood. Several ventilation holes are opened on the buffer assembly to connect the two sides of the buffer assembly. A sealing assembly, disposed outside the buffer assembly, is adapted to seal against the kiln body and kiln hood. A buffer cavity is formed between the sealing assembly and the buffer assembly, and the buffer cavity communicates with the interior of the kiln hood through the vent hole. A pressure detection component is connected to the buffer chamber and is used to monitor the pressure inside the buffer chamber.
2. The rotary kiln sealing device as described in claim 1, characterized in that, The buffer assembly also includes a plurality of filter elements, each of which corresponds to one of the vent holes. The filter elements are disposed on the vent holes and are used to filter smoke and dust.
3. The rotary kiln sealing device as described in claim 1, characterized in that, The sealing assembly includes: A cover, suitable for surrounding the kiln body, is connected at one end to the kiln cover. The cover has an annular cavity that communicates with the inner side of the cover. The floating base is annular and slidably disposed within the annular cavity, having the freedom to slide along the direction perpendicular to the kiln body axis, and protruding inward from the cover; The first sealing ring is connected to the floating substrate or the kiln body and is sealed to the floating substrate and the kiln body.
4. The rotary kiln sealing device as described in claim 3, characterized in that, The buffer component includes: The first support has one end connected to the floating base and the other end extending between the kiln body and the kiln hood; A buffer ring is connected to the first bracket, and its two sides are adapted to seal with the kiln body and the kiln hood. The buffer ring is provided with a number of ventilation holes. A first pressure plate is located on the side of the buffer ring facing away from the first bracket and is connected to the first bracket to press the buffer ring onto the first bracket.
5. The rotary kiln sealing device as described in claim 4, characterized in that, The first support has a first mounting groove at one end facing away from the floating base. The first mounting groove has a transverse V-shaped structure. The buffer ring has a V-shaped cross-section along the axial direction and is embedded in the first mounting groove. Its upper and lower ends abut against the kiln body and the kiln cover.
6. The rotary kiln sealing device as described in claim 3, characterized in that, The sealing assembly further includes: The second support is located on the side of the floating base opposite to the buffer assembly, with one end connected to the floating base; The second sealing ring is connected to the second bracket, and its two sides are adapted to seal with the kiln body and the cover. The second pressure plate is located on the side of the second sealing ring facing away from the second bracket and is connected to the second bracket to press the second sealing ring onto the second bracket.
7. The rotary kiln sealing device as described in claim 6, characterized in that, The second bracket has a second mounting groove at one end facing away from the floating base. The second mounting groove has a transverse V-shaped structure. The second sealing ring has a V-shaped cross-section along the axial direction and is embedded in the second mounting groove. Its upper and lower ends abut against the kiln body and the cover.
8. A rotary kiln, characterized in that, Includes the rotary kiln sealing device as described in any one of claims 1-7.