Rotary kiln system
By installing a loss-in-weight feeder and a hood assembly outside the rotary kiln, the problem of friction between the feeder and the rotary kiln was solved, improving product quality and ease of maintenance, and achieving stable material conveying and efficient recycling.
Patent Information
- Application Number
- CN202423323599.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2034-12-31
AI Technical Summary
In existing rotary kiln systems, the feeder and rotary kiln experience severe friction, leading to decreased product quality and inconvenient maintenance.
The feeder is located outside the rotary kiln and uses a loss-in-weight feeder. The material is conveyed into the rotary kiln through a hood assembly. The material conveying efficiency and stability are improved by combining seals and vibrating components. Seals are installed to prevent dust leakage, and the feeder's conveying rate is controlled by a PLC.
It avoids wear and tear on the feeder and rotary kiln, improves product quality, enables convenient maintenance and stable material conveying, and ensures efficient material recycling and reuse.
Smart Images
Figure CN223663714U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of rotary kiln technology, and specifically relates to a rotary kiln system. Background Technology
[0002] Rotary kilns are crucial equipment in the production of anhydrous iron phosphate, the cathode material for new energy batteries. The feeding method of a rotary kiln plays a vital role in product quality and production capacity. Current rotary kiln systems typically place the feeder inside the kiln, which not only presents maintenance difficulties but also makes the feeder prone to friction with the kiln, leading to the introduction of metallic foreign objects into the kiln's output and affecting product quality. Utility Model Content
[0003] The purpose of this invention is to provide a rotary kiln system that solves the technical problems of friction between the feeder and the rotary kiln and inconvenient maintenance in the prior art.
[0004] To achieve the above objectives, this utility model provides a rotary kiln system, which includes:
[0005] Silo components;
[0006] The feeder is connected to the discharge end of the hopper assembly;
[0007] The rotary kiln body has a feed inlet at one end along its length.
[0008] The hood assembly is installed over the feed inlet. The hood assembly includes a hood body and a chute placed inside the hood body. The top of the hood body is provided with a feed inlet that communicates with the discharge end of the feeder. One end of the chute is connected to the feed inlet, and the other end extends into the rotary kiln body.
[0009] In this embodiment of the invention, the feeder is a loss-in-weight feeder, and the hopper assembly includes:
[0010] Storage silos are used to store materials;
[0011] The mixing silo has its inlet end connected to the outlet end of the storage silo via a first conveying hose. The mixing silo is equipped with an agitator for mixing materials, and a feeder is located at the outlet end of the mixing silo.
[0012] In an embodiment of this utility model, the feeder is located between the mixing hopper and the hood body, and a discharge port is formed at the bottom of the feeder. The feeder is used to transport materials to the inlet of the hood body.
[0013] In an embodiment of this utility model, the feeder includes a conveying screw, a transmission component, and rolling bearings. Rolling bearings are connected to both ends of the conveying screw, and the transmission component is connected to one end of the conveying screw.
[0014] In an embodiment of this utility model, the discharge port of the feeder and the inlet of the hood body are connected by a second conveying hose.
[0015] In an embodiment of this utility model, the rotary kiln system further includes an air outlet duct and an induced draft fan and a dust collector arranged on the air outlet duct. The feeder is also provided with a dust return port, and the hood body is also provided with an air outlet. The two ends of the air outlet duct are respectively connected to the air outlet and the dust return port.
[0016] In an embodiment of this utility model, a conveying pipe is arranged at the discharge end of the storage silo, and a discharge valve is provided on the conveying pipe.
[0017] In an embodiment of this utility model, a clearance gap is provided between the hood body and the outer peripheral wall of the feed inlet of the rotary kiln body. The rotary kiln system also includes a sealing element, which is sealed within the clearance gap.
[0018] In an embodiment of this utility model, the rotary kiln system further includes a vibrating element for vibrating feeding, the chute is arranged at an inclination, and the vibrating element is arranged inside the hood body and connected to the outer peripheral wall of the chute.
[0019] In an embodiment of this utility model, an inspection door is also provided on the hood body, and the inspection door is located on the side of the hood body away from the rotary kiln body.
[0020] Through the above technical solution, the rotary kiln system provided by the embodiments of this utility model has the following beneficial effects:
[0021] The rotary kiln system of this embodiment includes a hopper assembly, a feeder, a rotary kiln body, and an air hood assembly. The feeder is connected to the discharge end of the hopper assembly. An inlet is provided at the end of the rotary kiln body along its length. The air hood assembly covers the inlet and includes an air hood body and a chute placed inside the air hood body. The top of the air hood body has an inlet communicating with the discharge end of the feeder. One end of the chute communicates with the inlet, and the other end extends into the rotary kiln body, allowing the material fed into the air hood body to slide down into the rotary kiln body under the guidance of the chute, thus completing the feeding of the rotary kiln. Compared to existing rotary kiln systems, this embodiment places the feeder outside the rotary kiln body, avoiding wear caused by contact between the feeder and the rotary kiln body, and facilitating maintenance of the feeder.
[0022] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description
[0023] The accompanying drawings are provided to further illustrate the embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without any inventive effort. In the drawings:
[0024] Figure 1 A schematic diagram of the rotary kiln system in one embodiment of this utility model;
[0025] Figure 2 A schematic diagram of the structure of the wind shield assembly in one embodiment of the present invention is shown;
[0026] Figure 3 This diagram shows a structural schematic of the mixing hopper and the feeder in one embodiment of the present invention;
[0027] Figure 4 A partial structural schematic diagram of a rotary kiln system in one embodiment of the present invention is shown.
[0028] Explanation of reference numerals in the attached figures
[0029] 11 Storage bins 3 Rotary kiln body
[0030] 12 Mixing hopper 41 Air hood body
[0031] 13 Agitator 42 Sluice
[0032] 2 Feeder 5 First conveying hose
[0033] 21 Conveying Screw 6 Second Conveying Hose
[0034] 22 Rolling bearings 7 Seals
[0035] 23 Weighing sensors 8 Vibrating components
[0036] 24 Dust return port 9 Inspection door
[0037] 25 Observation port 10 Pneumatic wafer butterfly valve Detailed Implementation
[0038] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.
[0039] The rotary kiln system according to this utility model is described below with reference to the accompanying drawings.
[0040] like Figure 1As shown, this embodiment proposes a rotary kiln system, which includes a hopper assembly, a feeder 2, a rotary kiln body 3, and a hood assembly. The feeder 2 is connected to the discharge end of the hopper assembly. The rotary kiln body 3 has a feed inlet at its length end. The hood assembly covers the feed inlet and includes a hood body 41 and a chute 42 placed inside the hood body 41. The top of the hood body 41 has an inlet communicating with the discharge end of the feeder 2. One end of the chute 42 communicates with the inlet, and the other end extends into the rotary kiln body 3, allowing the material fed into the hood body 41 to slide down into the rotary kiln body 3 under the guidance of the chute 42, thus completing the feeding of the rotary kiln. Compared with the rotary kiln system in the prior art, this embodiment avoids contact wear between the feeder 2 and the rotary kiln body 3 by placing the feeder 2 outside the rotary kiln body 3, thus solving the problem of low product qualification rate caused by excessive metal particles and magnetic foreign matter in the product. Furthermore, because the feeder 2 is located outside the rotary kiln body 3, maintenance and repair of the feeder 2 can be easily performed. It should be noted that... Figure 4 for Figure 1 Enlarged view of a portion of point A in the middle.
[0041] like Figure 1 and Figure 3 As shown, in this embodiment, the feeder 2 is a loss-in-weight feeder, and the hopper assembly includes a storage hopper 11 and a mixing hopper 12. The storage hopper 11 is used to store materials. The inlet end of the mixing hopper 12 and the outlet end of the storage hopper 11 are connected by a first conveying hose 5. The feeder 2 is located at the outlet end of the mixing hopper 12 to receive the materials conveyed by the mixing hopper 12 and transport them to the hood body 41. In this embodiment, the inlet end of the mixing hopper 12 and the outlet end of the storage hopper 11 are connected by a first conveying hose 5. The reason for this is that the feeder 2 in this embodiment is a loss-in-weight feeder 2. If other connection methods are used, the weight of the storage hopper 11 will press down on the mixing hopper 12 and the feeder 2 below the mixing hopper 12, thus affecting the weighing result of the feeder 2. Therefore, a support can be installed on the storage bin 11 to ensure that the storage bin 11 can be supported on the ground, thereby preventing the weight of the storage bin 11 from pressing down on the feeder 2 and affecting the measurement work of the feeder 2.
[0042] In addition, the mixing silo 12 is equipped with an agitator 13 for mixing materials. The agitator 13 is driven by a motor. During the process of conveying materials from the mixing silo 12 into the rotary kiln body 3, the agitator 13 is always in operation to ensure that the materials are fully mixed, improve the looseness of the materials entering the feeder 2, and facilitate the material to be conveyed from the feeder 2 into the rotary kiln body 3 for further processing. The bottom of the storage silo 11 is connected to a conveying pipe, which is arranged between the storage silo 11 and the mixing silo 12. The conveying pipe is equipped with a discharge valve for controlling the discharge from the storage silo 11, thereby controlling the feeding into the mixing silo 12. In some cases, the discharge valve can be one of a slide gate valve, a ball valve, or a butterfly valve. In this embodiment, the feeding valve adopts a pneumatic wafer butterfly valve 10. Compared with the slide gate valve, the pneumatic wafer butterfly valve 10 in this embodiment reacts faster and has a shorter reaction time, reducing the risk of inaccurate weighing of materials by the weighing sensor 23 due to untimely valve closure.
[0043] like Figure 1 and Figure 3 As shown, in this embodiment, the feeder 2 is located between the mixing hopper 12 and the hood body 41. A discharge port is formed at the bottom of the feeder 2, which is used to convey materials to the inlet of the hood body 41. The feeder 2 includes a conveying screw 21, a transmission component, and rolling bearings 22. The feeder 2 also includes a protective shell with a storage space inside. Each end of the conveying screw 21 is connected to a rolling bearing 22. The transmission component is connected to one end of the conveying screw 31 to drive it. Both rolling bearings 22 are supported on the protective shell to prevent friction between the conveying screw 21 and the protective shell. Furthermore, because the feeder 2 is located outside the rotary kiln body 3 in this embodiment, the conveying screw 21 can be easily maintained by disassembling the rolling bearings 22, and lubrication is also convenient. This invention solves the problem in the existing technology where the discharge end of the volume feeder is located inside the rotary kiln body, and the friction between the spiral shaft and the sliding bearing of the metal sleeve on the volume feeder causes metal particles and magnetic foreign objects to fall into the material, resulting in material contamination and inconvenient maintenance.
[0044] Compared to the volumetric feeders used in existing technologies, the loss-in-weight feeder in this embodiment provides more accurate material weighing. The loss-in-weight feeder 2 in this embodiment is equipped with a weighing sensor 23, which can sense the weight changes in the mixing hopper in real time, thereby adjusting the conveying speed of the feeder 2 to ensure that the weight of the material ultimately entering the rotary kiln body 3 is stable, achieving stable feeding. It should be noted that the loss-in-weight screw weigher includes a weighing sensor 23 and a conveying screw 21.
[0045] In addition, this system is also equipped with a PLC (Programmable Logic Controller). For example... Figure 1 As shown, two weighing sensors 23 are also installed below the protective shell of the feeder 2, and the two weighing sensors 23 are arranged at intervals along the length of the feeder 2. The weighing sensors 23 can feed back the real-time weight of the material in the feeder 2 to the PLC, and the PLC can adjust and control the conveying speed of the conveying screw 21 in real time. Specifically, the number of weighing sensors 23 can be adjusted according to actual needs.
[0046] With the above-described settings in this embodiment, in some cases, the deviation of material weight can be controlled within ±1%, achieving stable feeding. Furthermore, during the process of conveying materials to the feeder 2 within the mixing hopper 12, the agitator 13 continuously agitates the materials, increasing the moisture content and specific surface area of the materials, thereby effectively improving the finished product qualification rate.
[0047] like Figure 1 As shown, in this embodiment, the discharge port of the feeder 2 and the inlet of the hood body 41 are connected by a second conveying hose 6. The feeder 2 and the mixing hopper 12 located at the top of the feeder 2 can also be supported on the ground by a bracket. The second conveying hose 6 between the discharge port of the feeder 2 and the inlet of the hood body 41 prevents the hood body 41 from supporting the feeder 2, thus avoiding affecting the weighing accuracy of the material by the weighing sensor 23, and also buffers pressure changes between the feeder 2 and the hood body 41. It should be noted that in this embodiment, both the first conveying hose 5 and the second conveying hose 6 can be made of PTFE (polytetrafluoroethylene), but can also be made of other materials as needed.
[0048] like Figure 1 As shown, in this embodiment, the rotary kiln system also includes an exhaust duct, a bag filter, and an induced draft fan arranged on the exhaust duct. An exhaust branch is arranged on the exhaust duct, and a dust return port 24 is provided on the feeder 2. An exhaust port is also provided on the hood body 41. The two ends of the exhaust duct are connected to the exhaust port and the dust return port 24, respectively. Moist and hot gas exists in the rotary kiln body 3, which often carries material dust. The induced draft fan can draw the moist and hot gas from the hood body 41 into the exhaust duct and transport it to the dust collector for enrichment. The enriched material can be transported from the dust return port 24 through the exhaust duct to the feeder 2. The moist and hot gas can be discharged to the outside through the exhaust branch under the action of the induced draft fan, achieving a good material recovery effect and ensuring efficient material recycling and reuse.
[0049] In addition, such as Figure 1 and Figure 4As shown, the hood body 41 of this embodiment includes a cylindrical body and a bottom cover. The bottom cover is located on the side of the cylindrical body opposite to the rotary kiln body 3. The hood body 41 has a storage space for placing the chute 42. Air outlets are located on the outer wall of the cylindrical body and are spaced circumferentially from the feed inlet. The feed inlet is located at the top of the cylindrical body, and the air outlets are inclined at 45° relative to the feed inlet. In some embodiments, the angle between the air outlets and the feed inlet of the hood body 41 can be adjusted according to actual conditions.
[0050] like Figure 4 As shown, in this embodiment, an inspection door 9 is provided on the bottom cover. The inspection door 9 is located on the side of the hood body 41 away from the rotary kiln body 3 and is provided corresponding to the vibrating element 8, so that when the vibrating element 8 needs maintenance and repair, the inspection door 9 can be opened to carry out maintenance and replacement work conveniently, and it is convenient for staff to enter and exit.
[0051] like Figure 1 As shown in this embodiment, the feeder 2 is also provided with two observation ports 25. The two observation ports 25 are arranged alternately along the length of the feeder 2. The operator can conveniently observe the working status inside the feeder 2 and the material filling rate through the observation ports 25, and make corresponding adjustments, such as adjusting the conveying speed. Specifically, the number of observation ports 25 can be adjusted according to actual needs.
[0052] like Figure 2 and Figure 3 As shown, in this embodiment, a clearance gap is provided between the hood body 41 and the outer peripheral wall of the feed inlet of the rotary kiln body 3. The hood body 41 and the rotary kiln body 3 are not connected. A bracket is also provided on the hood body 41 to support it on the ground. The rotary kiln system also includes a sealing element 7, which is sealed within the clearance gap. In this embodiment, the sealing element 7 is a silicone plate. One end of the silicone plate is detachably connected to the hood body 41 by bolts, and the other end overlaps the rotary kiln body 3 and can seal the clearance gap, thereby preventing material dust inside the hood body 41 from falling into the external working space through the clearance gap.
[0053] like Figure 1 As shown, in this embodiment, the rotary kiln system also includes a vibrating element 8 for vibrating feeding. The chute 42 is arranged at an inclination. The vibrating element 8 is arranged inside the hood body 41 and connected to the outer peripheral wall of the chute 42 to improve material conveying efficiency and effectively reduce the material adhering to the chute 42.
[0054] In the description of this utility model, it should be understood that 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 indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0055] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; 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 or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0056] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0057] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.
Claims
1. A rotary kiln system, characterized in that, The rotary kiln system includes: Silo components; The feeder (2) is connected to the discharge end of the hopper assembly; The rotary kiln body (3) has a feed inlet at one end along its length. The hood assembly covers the feed inlet. The hood assembly includes a hood body (41) and a chute (42) placed inside the hood body (41). The top of the hood body (41) is provided with a feed inlet that communicates with the discharge end of the feeder (2). One end of the chute (42) is connected to the feed inlet, and the other end extends into the rotary kiln body (3).
2. The rotary kiln system according to claim 1, characterized in that, The feeder (2) is a loss-in-weight feeder, and the hopper assembly includes: Storage silo (11) is used to store materials; The mixing silo (12) is connected to the discharge end of the storage silo (11) via a first conveying hose (5). The mixing silo (12) is equipped with a stirrer (13) for stirring materials. The feeder (2) is located at the discharge end of the mixing silo (12).
3. The rotary kiln system according to claim 2, characterized in that, The feeder (2) is located between the mixing hopper (12) and the hood body (41). The bottom of the feeder (2) has a discharge port. The feeder (2) is used to transport materials to the inlet of the hood body (41).
4. The rotary kiln system according to claim 3, characterized in that, The feeder (2) includes a conveying screw (21), a transmission component and a rolling bearing (22). The rolling bearing (22) is connected to each end of the conveying screw (21), and the transmission component is connected to one end of the conveying screw (21).
5. The rotary kiln system according to claim 3, characterized in that, The discharge port of the feeder (2) is connected to the inlet of the hood body (41) via a second conveying hose (6).
6. The rotary kiln system according to claim 3, characterized in that, The rotary kiln system also includes an air outlet duct and an induced draft fan and a dust collector arranged on the air outlet duct. The feeder (2) is also provided with a dust return port (24), and the hood body (41) is also provided with an air outlet. The two ends of the air outlet duct are respectively connected to the air outlet and the dust return port (24).
7. The rotary kiln system according to claim 3, characterized in that, A conveying pipe is arranged at the discharge end of the storage silo (11), and a discharge valve is provided on the conveying pipe.
8. The rotary kiln system according to any one of claims 1 to 7, characterized in that, A clearance is provided between the hood body (41) and the outer peripheral wall of the feed inlet of the rotary kiln body (3). The rotary kiln system also includes a sealing element (7), which is sealed within the clearance.
9. The rotary kiln system according to any one of claims 1 to 7, characterized in that, The rotary kiln system also includes a vibrating element (8) for vibrating feeding. The chute (42) is arranged at an inclination. The vibrating element (8) is arranged inside the hood body (41) and connected to the outer peripheral wall of the chute (42).
10. The rotary kiln system according to claim 9, characterized in that, The hood body (41) is also provided with an inspection door (9), which is located on the side of the hood body (41) away from the rotary kiln body (3).