Anti-knopping preheater
By adopting a rotating cylinder structure and a design with teeth and striking components in the preheater, the problem of channel blockage caused by preheater nodule formation was solved, achieving automated cleaning, improving equipment stability and heat exchange efficiency, and reducing maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HEBEI XIANGJINCHAO ENV PROTECTION TECH CO LTD
- Filing Date
- 2025-08-29
- Publication Date
- 2026-07-21
AI Technical Summary
Existing preheaters are prone to caking during operation, which leads to channel blockage, reduced heat exchange efficiency, and difficulty in completely removing dead corners and caking by manual cleaning. This results in high labor intensity, high equipment maintenance costs, and production interruptions that affect lime production.
The rotating drum structure ensures continuous material flow, and the combination of toothed and striking components prevents material accumulation, increases the heat exchange area, and achieves automated cleaning.
It effectively avoids the problem of nodule formation caused by local accumulation, improves the stability of equipment operation and heat exchange efficiency, reduces the frequency of equipment maintenance and labor intensity, and reduces equipment maintenance costs.
Smart Images
Figure CN224530841U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of lime production technology, and more specifically, relates to an anti-nodulation preheater. Background Technology
[0002] Preheaters are key energy-saving devices in lime production. They primarily utilize the principle of heat exchange, using the high-temperature flue gas discharged from the rotary kiln to preheat the material entering the kiln (such as limestone), thereby reducing the thermal load of the rotary kiln and shortening the calcination time. However, preheaters are prone to "nodulation" during operation: when alkali metals, sulfur, and other components in the material form low-melting-point compounds at high temperatures, or when the material melts due to localized overheating, viscous substances adhere to the inner wall of the preheater, gradually accumulating to form hard nodules, leading to channel blockage and reduced heat exchange efficiency.
[0003] Currently, the mainstream method in the industry for dealing with preheater nodules is to shut down the machine and clean them manually. Specifically, when the nodules reach a certain thickness, the machine must be shut down and the preheater must be allowed to cool down before operators enter the preheater through the maintenance door and use tools to mechanically break up and remove the nodules.
[0004] The inventors discovered that the cleaning environment inside the preheater is harsh, requiring multiple workers to work together for a single cleaning, which is labor-intensive and poses safety risks. Furthermore, manual cleaning is difficult to completely remove lumps in dead corners, resulting in a shortened lumping cycle. Equipment shutdowns also directly lead to the interruption of lime production, and frequent start-ups and shutdowns exacerbate the wear and tear of refractory materials in the kiln, increasing equipment maintenance costs. Utility Model Content
[0005] The purpose of this application is to provide an anti-nodulation preheater to solve the technical problem that it is difficult to completely remove the nodules in the dead corners after nodulation occurs inside the existing preheater.
[0006] To achieve the above objectives, the technical solution adopted in this application is as follows: A preheater for preventing nodulation is provided, comprising: The support frame has a feeding component and a discharging component arranged side by side in a vertical direction, the feeding component and the discharging component being used to communicate with a feeding device and a rotary kiln, respectively; and A rotating cylinder is rotatably disposed between the loading component and the unloading component in the up-down direction, and is connected to a driving component for transmission. The rotating cylinder has a straight cylindrical structure with open ends, and its two ends are respectively connected to the loading component and the unloading component; in addition, the interior of the rotating cylinder is also used to allow high-temperature gas to be introduced so that the material and the high-temperature gas can exchange heat.
[0007] In one possible implementation, both the upper and lower ends of the rotating cylinder have teeth; the two teeth abut against the inner wall of the upper part and the inner wall of the lower part respectively, so that when the rotating cylinder rotates, the two teeth abut against the inner wall of the upper part and the lower part respectively.
[0008] In one possible implementation, the inner diameter of the feed piece gradually increases from top to bottom, and / or the inner diameter of the feed piece gradually decreases from top to bottom.
[0009] In one possible implementation, the rotating cylinder end has a plurality of teeth, which are spaced apart circumferentially along the rotating cylinder.
[0010] In one possible implementation, both the loading component and the unloading component are coaxially provided with connecting rings, each connecting ring being rotatably connected to the corresponding loading component or unloading component, and the outer wall of the connecting ring being in contact with the teeth located at the same end.
[0011] In one possible implementation, the driving component includes: An external gear ring is coaxially disposed on the outer periphery of the rotating cylinder; and A drive gear is rotatably mounted on the bracket and meshes with the external gear ring; the drive gear is connected to a drive motor.
[0012] In one possible implementation, the anti-nodulation preheater further includes: Multiple striking components are arranged at intervals around the rotating cylinder on the support; Each of the striking components is used to apply a force toward the central axis of the rotating cylinder.
[0013] In one possible implementation, the striking component includes: A roller, rotatably mounted on the bracket, has its axial direction and rotational axis both parallel to the axial direction of the rotating cylinder; and Multiple striking elements are spaced apart along the circumference of the roller; each striking element is slidably connected to the roller radially and is provided with an elastic reset element between it and the roller; The elastic reset member is used to drive the corresponding striking member to move outward to abut against the outer wall of the rotating cylinder.
[0014] In one possible implementation, the outer end of the striking element has an arc-shaped structure.
[0015] In one possible implementation, the outer peripheral wall of the roller has a plurality of mounting slots spaced around itself, and the plurality of striking elements correspond one-to-one with the plurality of mounting slots, and each striking element is slidably connected to the corresponding mounting slot. The elastic reset component is a compression spring, and the two ends of the compression spring are respectively connected to the mounting groove and the striking component.
[0016] In this embodiment, during material preheating, the feeding device first feeds the material to be preheated into the device through the feeding component on the support. Then, the driving component drives the rotating drum to rotate, and the material is evenly distributed and moves downwards within the rotating drum; simultaneously, high-temperature gas is introduced from the open ends of the rotating drum, directly contacting the material for heat exchange. Finally, the preheated material is discharged through the unloading component and enters the rotary kiln for subsequent roasting.
[0017] The anti-caking preheater provided in this application embodiment, compared with the prior art, allows for continuous material flow through the rotation of the rotating drum, avoiding the problem of clumping caused by local accumulation and improving the operational stability of the equipment. The straight cylindrical structure, combined with the direct contact of high-temperature gas with the material, increases the heat exchange area and improves the preheating efficiency of the material. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a three-dimensional structural schematic diagram of the anti-nodulation preheater provided in the embodiments of this application; Figure 2 This is a bottom view of the anti-nodulation preheater provided in an embodiment of this application; Figure 3 This is a side view of the anti-nodulation preheater provided in an embodiment of this application; Figure 4 For along Figure 3 Schematic diagram of the cross-sectional structure along line AA; Figure 5 for Figure 4 A magnified structural diagram of region B in the middle; Figure 6 This is a three-dimensional cross-sectional schematic diagram of the anti-nodulation preheater provided in the embodiments of this application; The following are the labeling elements in the figure: 1. Support; 11. Feeding component; 12. Unloading component; 2. Rotating cylinder; 21. Gear; 22. Connecting ring; 3. Driving component; 31. External gear ring; 32. Driving gear; 33. Driving motor; 4. Striking component; 41. Roller; 42. Striking component; 43. Elastic reset component; 44. Mounting slot. Detailed Implementation
[0020] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.
[0021] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.
[0022] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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. Therefore, they should not be construed as limitations on this application.
[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0024] Please refer to the following: Figures 1 to 6 The anti-nodulation preheater provided in this application will now be described. The anti-nodulation preheater includes a support 1 and a rotating cylinder 2.
[0025] The support 1 has a feeding component 11 and a discharging component 12 arranged side by side in the vertical direction. The feeding component 11 and the discharging component 12 are used to communicate with the feeding equipment and the rotary kiln, respectively.
[0026] The rotating cylinder 2 is arranged between the loading component 11 and the unloading component 12 in a vertical direction, and is connected to the drive component 3 for transmission.
[0027] The rotating cylinder 2 adopts a straight cylindrical structure with open ends, and its two ends are connected to the loading component 11 and the unloading component 12 respectively; in addition, the interior of the rotating cylinder 2 is also used to allow high-temperature gas to pass through, so that the material and the high-temperature gas can exchange heat.
[0028] The feeding component 11 and the unloading component 12 are fixed by the bracket 1. The rotating drum 2 rotates under the drive of the driving component 3. The material enters the rotating drum 2 from the top, exchanges heat with the high temperature gas introduced inside, and is discharged from the bottom. At the same time, the rotation of the rotating drum 2 reduces the material adhering to the inner wall.
[0029] When the anti-caking preheater provided in this application embodiment is working: first, the material enters the rotating drum 2 through the feeding component 11; then, the driving component 3 is started, driving the rotating drum 2 to rotate; then, high-temperature gas is introduced into the rotating drum 2 to exchange heat with the material; finally, the material after heat exchange enters the rotary kiln through the unloading component 12.
[0030] The rotating cylinder 2 can be made of high-temperature resistant alloy material to extend its service life, or a guide plate can be added to the cylinder wall to optimize the airflow distribution.
[0031] In this embodiment, when preheating the material, the feeding device first feeds the material to be preheated into the device through the feeding component 11 on the support 1. Then, the driving component 3 drives the rotating drum 2 to rotate, and the material is evenly distributed and moves downwards within the rotating drum 2 as it rotates; simultaneously, high-temperature gas is introduced from the open ends of the rotating drum 2, directly contacting the material for heat exchange. Finally, the preheated material is discharged through the unloading component 12 and enters the rotary kiln for subsequent roasting treatment.
[0032] The anti-caking preheater provided in this application embodiment, compared with the prior art, allows the rotating cylinder 2 to maintain continuous material flow, avoiding the problem of clumping caused by local accumulation and improving the operational stability of the equipment. The straight cylindrical structure, combined with the direct contact of high-temperature gas with the material, increases the heat exchange area and improves the preheating efficiency of the material.
[0033] In some embodiments, the rotating cylinder 2 may be as follows: Figures 1 to 6 The structure shown is described in the following document. Figures 1 to 6 The rotating cylinder 2 has teeth 21 at both the upper and lower ends; the two teeth 21 abut against the inner wall of the upper part 11 and the inner wall of the lower part 12 respectively, so that when the rotating cylinder 2 rotates, the two teeth 21 will pry the attached material on the inner wall of the upper part 11 and the lower part 12 respectively.
[0034] When the rotating drum 2 rotates, the upper and lower end teeth 21 contact the inner walls of the upper and lower material parts 11 and 12 respectively, and peel off the attached material particles through mechanical friction. The teeth 21 at both ends of the rotating drum 2 rotate with the drum body, abut against the inner walls of the upper and lower material parts 12 and scrape off the attached material to prevent material accumulation and blockage.
[0035] The teeth 21 can be made of wear-resistant materials or designed as a replaceable structure for easy maintenance and replacement.
[0036] By adopting the above technical solution, it is possible to actively clean the deposits on the inner wall of the rotating drum 2, avoid the occurrence of nodule formation, reduce the risk of blockage, and reduce downtime for cleaning.
[0037] In some embodiments, the loading component 11 and the unloading component 12 can be adopted as follows: Figures 1 to 6 The structure shown is described in the following document. Figures 1 to 6 The inner diameter of the feeding part 11 gradually increases from top to bottom, and / or the inner diameter of the unloading part 12 gradually decreases from top to bottom.
[0038] The material flows dispersedly in the flared section of the feed component 11 and converges and accelerates discharge in the constricted section of the discharge component 12. The increased inner diameter of the feed component 11 forms a flared structure, reducing material accumulation at the inlet; the reduced inner diameter of the discharge component 12 forms a constricted structure, enhancing the guiding effect of material discharge.
[0039] The taper angles of the feeder 11 and the discharger 12 can be changed to adapt to materials with different flowability.
[0040] By adopting the above technical solutions, the material flow path can be optimized, the residue can be reduced, and the conveying efficiency can be improved.
[0041] In some embodiments, the aforementioned teeth 21 may be as follows: Figure 4 and Figure 6 The structure shown is described in the following document. Figure 4 and Figure 6 The rotating cylinder 2 has multiple teeth 21 at its end, and the multiple teeth 21 are arranged at intervals along the circumference of the rotating cylinder 2.
[0042] As the rotating cylinder 2 rotates once, the circumferentially spaced teeth 21 sequentially scrape across the inner wall, forming a continuous cleaning action. Multiple teeth 21 are evenly distributed around the circumference of the rotating cylinder 2, scraping the inner wall from all directions during rotation, avoiding dead corners in local cleaning.
[0043] The teeth 21 can be arranged in an alternating pattern or in combination of different lengths to adapt to complex inner wall shapes.
[0044] By adopting the above technical solution, the goal of full coverage of the cleaning range was achieved, and the uniformity of the anti-tumor effect was improved.
[0045] In some embodiments, the loading component 11 and unloading component 12 can be adopted as follows: Figure 4 and Figure 6 The structure shown is described in the following document. Figure 4 and Figure 6Both the loading component 11 and the unloading component 12 are coaxially provided with connecting rings 22. Each connecting ring 22 is rotatably connected to the corresponding loading component 11 or unloading component 12, and the outer wall of the connecting ring 22 is connected to the tooth 21 located at the same end.
[0046] The connecting ring 22 can connect multiple teeth 21 together to form a whole, preventing individual teeth 21 from deforming and affecting the overall cleaning effect. A rolling bearing can be added between the connecting ring 22 and the loading part 11 or unloading part 12 to reduce the coefficient of friction.
[0047] By adopting the above technical solution, the stability of the pick 21 can be improved, and the service life of the equipment can be increased.
[0048] In some embodiments, the driving component 3 described above may be as follows: Figures 1 to 4 and Figure 6 The structure shown is described in the following document. Figures 1 to 4 and Figure 6 The driving component 3 includes an external gear ring 31 and a driving gear 32.
[0049] The external gear ring 31 is coaxially arranged on the outer periphery of the rotating cylinder 2.
[0050] The drive gear 32 is rotatably mounted on the bracket 1 and meshes with the external gear ring 31; the drive gear 32 is connected to the drive motor 33.
[0051] The drive motor 33, through its meshing with the external gear ring 31 via the drive gear 32, transmits power to the rotating drum 2, achieving controllable rotation speed. When the drive motor 33 starts, it drives the drive gear 32 to rotate, which in turn meshes with the external gear ring 31, causing the rotating drum 2 to rotate around its axis. During rotation, the rotating drum 2 rubs against the material inside, preventing material from adhering to and forming lumps on its inner wall. The drive motor 33 can dynamically adjust its rotation speed according to the material characteristics.
[0052] By adopting the above technical solution, the above-mentioned drive component 3 has the advantages of high transmission accuracy, flexible speed adjustment, and adaptability to different working conditions.
[0053] In some embodiments, the above-mentioned anti-nodulation preheater can be adopted as follows: Figures 1 to 6 The structure shown is described in the following document. Figures 1 to 6 The anti-tumor preheater also includes multiple striking components 4.
[0054] Multiple striking components 4 are arranged at intervals around the rotating cylinder 2 on the support 1.
[0055] Each striking component is used to apply a force toward the central axis of the rotating cylinder 2.
[0056] Multiple striking components 4 are spaced apart around the rotating cylinder 2, periodically applying radial force to the cylinder wall to shake off the material layer adhering to the inner wall of the rotating cylinder 2. When the rotating cylinder 2 rotates, the striking components 4 move synchronously, causing micro-vibrations in the cylinder wall through impact force. The striking frequency can be controlled by a PLC, or the striking intensity can be automatically adjusted according to the thickness of the material on the cylinder wall.
[0057] By adopting the above technical solution, the anti-nodulation preheater proposed in this application can combine the dual anti-nodulation mechanism of rotation and tapping to further improve the cleaning effect.
[0058] In some embodiments, the aforementioned striking member may be as follows: Figures 1 to 6 The structure shown is described in the following document. Figures 1 to 6 The striking component includes a roller 41 and a plurality of striking elements 42.
[0059] The roller 41 is rotatably mounted on the bracket 1, and the axial direction and rotational direction of the roller 41 are both parallel to the axial direction of the rotating cylinder 2.
[0060] Multiple striking elements 42 are spaced apart around the roller 41; each striking element 42 is slidably connected to the roller 41 radially, and an elastic reset element 43 is provided between it and the roller 41.
[0061] Among them, the elastic reset member 43 is used to drive the corresponding striking member 42 to move outward to abut against the outer wall of the rotating cylinder 2.
[0062] When the roller 41 rotates, multiple striking elements 42 periodically strike the outer wall of the rotating cylinder 2. While the striking elements 42 remain in contact with the outer wall of the rotating cylinder 2, they can retract into the roller 41, and at this time, the striking elements 42 push the elastic reset element 43 to accumulate elastic force. When the roller 41 moves the striking elements 42 to a point where they are no longer in contact with the rotating cylinder 2, the elastic reset element 43 is adapted to release the accumulated elastic force, thereby causing the striking elements 42 to move outward.
[0063] By adopting the above technical solution, the wall condition of the rotating cylinder 2 can be adapted to avoid equipment damage caused by excessive knocking, and the cleaning efficiency is high.
[0064] In some embodiments, the striking element 42 may be as follows: Figures 1 to 6 The structure shown is described in the following document. Figures 1 to 6 The outer end of the striking part 42 adopts an arc surface structure.
[0065] The curved surface structure forms a smooth contact with the cylinder wall during impact, reducing the pressure at the moment of impact. The outer curved surface of the striking component 42 makes line contact with the outer wall of the rotating cylinder 2, dispersing the impact stress and reducing local wear.
[0066] By adopting the above technical solution, the outer wall of the rotating cylinder 2 can be protected, the service life of the equipment can be extended, and the maintenance cost can be reduced.
[0067] In some embodiments, the roller 41 may be as follows: Figure 4 and Figure 5 The structure shown is described in the following document. Figure 4 and Figure 5 The outer peripheral wall of the roller 41 has multiple mounting slots 44 arranged around itself at intervals. Multiple striking elements 42 correspond one-to-one with the multiple mounting slots 44, and each striking element 42 is slidably connected to the corresponding mounting slot 44.
[0068] The elastic reset element 43 is a compression spring, and its two ends are connected to the mounting groove 44 and the striking element 42, respectively.
[0069] The striking element 42 slides radially within the mounting groove 44. The compression spring repeatedly expands and contracts as the roller 41 rotates, driving the striking action. The mounting groove 44 guides the striking element 42, and the compression spring provides a restoring force, ensuring that the striking element 42 continuously abuts against the cylinder wall. The mounting groove 44 can be designed as a dovetail groove structure to prevent the striking element 42 from falling off.
[0070] By adopting the above technical solution, the structure has high stability, the movement trajectory of the striking part 42 is accurate, and the reset of the compression spring is reliable.
[0071] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. An anti-nodulation preheater, characterized in that, include: support; The support has a feeding component and a discharging component arranged side by side in the vertical direction. The feeding component and the discharging component are respectively used to communicate with the feeding equipment and the rotary kiln. as well as A rotating cylinder is rotatably disposed between the loading component and the unloading component in the up-down direction, and is connected to a driving component for transmission. The rotating cylinder has a straight cylindrical structure with open ends, and its two ends are respectively connected to the loading component and the unloading component; in addition, the interior of the rotating cylinder is also used to allow high-temperature gas to be introduced so that the material and the high-temperature gas can exchange heat.
2. The anti-nodulation preheater as described in claim 1, characterized in that, Both ends of the rotating cylinder have teeth; the two teeth abut against the inner wall of the upper part and the inner wall of the lower part respectively, so that when the rotating cylinder rotates, the two teeth will abut against the material attached to the inner wall of the upper part and the lower part respectively.
3. The anti-nodulation preheater as described in claim 1 or 2, characterized in that, The inner diameter of the feeding component gradually increases from top to bottom, and / or the inner diameter of the unloading component gradually decreases from top to bottom.
4. The anti-nodulation preheater as described in claim 2, characterized in that, The rotating cylinder has multiple teeth at its end, and these teeth are spaced apart circumferentially along the rotating cylinder.
5. The anti-nodulation preheater as described in claim 2, characterized in that, Both the loading component and the unloading component are coaxially provided with connecting rings. Each connecting ring is rotatably connected to the corresponding loading component or unloading component, and the outer wall of the connecting ring is connected to the teeth located at the same end.
6. The anti-nodulation preheater as described in claim 1, characterized in that, The driving component includes: An external gear ring is coaxially disposed on the outer periphery of the rotating cylinder; and A drive gear is rotatably mounted on the bracket and meshes with the external gear ring; the drive gear is connected to a drive motor.
7. The anti-nodulation preheater as described in claim 1, characterized in that, The anti-nodulation preheater also includes: Multiple striking components are arranged at intervals around the rotating cylinder on the support; Each of the striking components is used to apply a force toward the central axis of the rotating cylinder.
8. The anti-nodulation preheater as described in claim 7, characterized in that, The striking component includes: A roller, rotatably mounted on the bracket, has its axial direction and rotational axis both parallel to the axial direction of the rotating cylinder; and Multiple striking elements are spaced apart along the circumference of the roller; each striking element is slidably connected to the roller radially and is provided with an elastic reset element between it and the roller; The elastic reset member is used to drive the corresponding striking member to move outward to abut against the outer wall of the rotating cylinder.
9. The anti-nodulation preheater as described in claim 8, characterized in that, The outer end of the striking component has an arc-shaped structure.
10. The anti-nodulation preheater as described in claim 8, characterized in that, The outer peripheral wall of the roller has a plurality of mounting slots spaced around itself, and the plurality of striking elements correspond one-to-one with the plurality of mounting slots, and each striking element is slidably connected to the corresponding mounting slot. The elastic reset component is a compression spring, and the two ends of the compression spring are respectively connected to the mounting groove and the striking component.