A rotary kiln system

Abstract

This invention proposes a rotary kiln system, including a furnace and a dust suppression assembly. The furnace has a feed inlet, a discharge outlet, and an air inlet, located at opposite ends of the furnace along its length. The air inlet is located at the end of the furnace with the discharge outlet. The dust suppression assembly includes a dust collector, an induced draft fan, an induced draft duct, and a baffle. The inlet of the induced draft duct has a reflux section, the lower end of which connects to the feed inlet. The baffle is located within the reflux section and guides the material back to the feed inlet along the reflux section. The dust collector has an air inlet and an air outlet, with the outlet end of the induced draft duct connected to the air inlet and the inlet end of the induced draft fan connected to the air outlet. This invention can prevent dust pollution of the outside air, reduce material waste, and lower production costs.

Description

Technical Field

[0001] This utility model relates to the field of rotary kiln technology, and in particular to a rotary kiln system. Background Technology

[0002] With the ever-increasing demand for new energy battery materials, rotary kilns have become an indispensable piece of equipment in the synthesis and production of cathode materials. To prevent dust from leaking into the air and affecting the surrounding environment, dust collection equipment is often added to the exhaust pipe outlet of rotary kilns using related technologies. The filter bags in the dust collection equipment collect the dust, which is then disposed of. However, during the sintering of small particles and some large particles, a large number of small particles enter the filter bags through the exhaust pipe, resulting in significant product waste and increased raw material and production costs. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a rotary kiln system.

[0004] The solution to the technical problem of this utility model is: A rotary kiln system, comprising: The furnace chamber is provided with a feed inlet, a discharge outlet and an air inlet. The feed inlet and the discharge outlet are respectively located at both ends of the furnace chamber along its length, and the air inlet is located at the end of the furnace chamber where the discharge outlet is located. The dust collection assembly includes a dust collector, an induced draft fan, an induced draft duct, and a baffle. The induced draft duct has a reflux section at its inlet, and the lower end of the reflux section is connected to the feed inlet. The baffle is located in the reflux section and is used to guide the material back to the feed inlet along the reflux section. The dust collector has an air inlet and an air outlet. The outlet end of the induced draft duct is connected to the air inlet, and the inlet end of the induced draft fan is connected to the air outlet.

[0005] This invention has at least the following beneficial effects: Material enters the furnace through the feed inlet for sintering, and the sintered material exits through the discharge outlet. Air enters through the air inlet under the action of the induced draft fan, carrying away dust from the material to improve product yield. Dust enters the induced draft pipe with the air; in the recirculation section, material mixed with dust but with acceptable particle size is blocked by a baffle and falls back into the feed inlet, re-entering the furnace for sintering, thereby improving material utilization and reducing waste. The dust enters the dust collector for separation and filtration from the air, and the filtered air is discharged into the atmosphere by the induced draft fan, preventing atmospheric pollution by dust. Furthermore, the air entering the furnace carries away some of the heat from the material at the discharge outlet, achieving a cooling effect. The air heated by the material at the discharge outlet enters the furnace to facilitate the sintering reaction, achieving heat source recovery and utilization, and reducing energy consumption.

[0006] As a further improvement to the above technical solution, the dust suppression assembly also includes a rotary drive component. The output shaft of the rotary drive component is connected to the baffle to drive the baffle to rotate within the reflux section. When the rotary drive component is activated, the baffle can rotate within the reflux section, effectively blocking materials with acceptable particle sizes and further reducing the amount of acceptable raw materials entering the dust collector.

[0007] As a further improvement to the above technical solution, the rotary drive component is located outside the exhaust duct and at the upper end of the return section. The dust suppression assembly also includes a rotating shaft, with the baffle connected to the outer periphery of the rotating shaft. The rotating shaft extends along the extension direction of the return section, and its upper end extends out of the return section and connects to the output shaft of the rotary drive component. This arrangement allows for a more rational arrangement of the rotary drive component and protects it from dust entering and causing malfunctions.

[0008] As a further improvement to the above technical solution, the dust suppression assembly also includes a seal, which is disposed on the outer periphery of the rotating shaft and connected to the outer wall of the exhaust duct. By providing the seal, leakage of dust from the openings in the exhaust duct through the rotating shaft can be prevented.

[0009] As a further improvement to the above technical solution, the baffle is arranged in a spiral shape along the extension direction of the recirculation section. With this arrangement, materials with the correct particle size can flow back to the feed inlet along the spiral baffle for reuse, making the recirculation process smoother.

[0010] As a further improvement to the above technical solution, the reflux section is arranged vertically. This arrangement makes it more advantageous for materials with qualified particle size to fall back into the furnace after being blocked by the baffle.

[0011] As a further improvement to the above technical solution, the dust collection assembly also includes a collection bag. The dust collector has a dust outlet at its lower end, and the collection bag is located below the dust outlet and detachably connected to the dust collector. Dust is collected by the collection bag and can be subsequently sent for disposal, preventing dust leakage.

[0012] As a further improvement to the above technical solution, the rotary kiln system also includes a discharge valve, which is connected to the furnace and located at the discharge port to open or close the discharge port. During the sintering process, by controlling the opening and closing of the discharge valve, the sintered material can be quantitatively fed from the discharge port into the downstream process.

[0013] As a further improvement to the above technical solution, the rotary kiln system also includes a drive mechanism. The output end of the drive mechanism is connected to the furnace chamber to drive the furnace chamber to rotate. By providing rotational power to the furnace chamber through the drive mechanism, the furnace chamber rotates, making the heat inside the furnace chamber more uniform and more conducive to completing sintering.

[0014] As a further improvement to the above technical solution, the rotary kiln system also includes a feeding assembly, which comprises a feeding bin, an arch-breaking component, and a feeding component. The outlet end of the feeding bin is connected to the inlet end of the feeding component. The arch-breaking component is located inside the feeding bin, and the outlet end of the feeding component is connected to the feed inlet. The material stored in the feeding bin is conveyed to the furnace feed inlet through the feeding component. Due to the presence of the arch-breaking component, material blockage in the feeding bin can be avoided, which is more conducive to the smooth progress of the entire sintering process. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly explained below. Obviously, the described drawings are only a part of the embodiments of this utility model, and not all of them. Those skilled in the art can obtain other design schemes and drawings based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of the rotary kiln system according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the furnace structure of the rotary kiln system according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the dust collection component of the rotary kiln system according to an embodiment of the present invention; Figure 4 yes Figure 1 A magnified structural diagram of part A in the middle; Figure 5 yes Figure 1A magnified structural diagram of part B in the middle section; Figure 6 This is a schematic diagram of the feeding assembly of the rotary kiln system according to an embodiment of the present invention.

[0017] Reference numerals: 100, furnace; 110, heating element; 120, feed inlet; 130, discharge outlet; 131, discharge valve; 140, air inlet; 200, dust suppression assembly; 210, dust collector; 211, air inlet; 212, air outlet; 213, dust outlet; 214, dust outlet valve; 220, induced draft fan; 230, induced draft duct; 231, reflux section; 232, baffle; 233, rotating shaft; 234, seal; 240, rotation drive component; 300, drive mechanism; 400, feed assembly; 410, feed hopper; 420, arch breaking component; 430, feeding component; 500, support roller. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0019] In the description of this utility model, the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0021] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0022] Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. The various technical features of this utility model can be combined interactively without contradicting each other.

[0023] Reference Figure 1 , Figure 2 and Figure 3 This utility model embodiment proposes a rotary kiln system, including a furnace 100 and a dust collection component 200. Through the specially arranged dust collection component 200, dust can be recovered while reducing the waste of useful materials.

[0024] In this embodiment, a heating component 110 is provided inside the furnace 100. A feed inlet 120 and a discharge outlet 130 are respectively provided at both ends of the furnace 100 along its length. An air inlet 140 is also provided at the end of the furnace 100 where the discharge outlet 130 is located. The dust collection assembly 200 includes a dust collector 210, an induced draft fan 220, an induced draft duct 230, and a baffle 232. A reflux section 231 is provided at the inlet of the induced draft duct 230, and the lower end of the reflux section 231 communicates with the feed inlet 120. The baffle 232 is located inside the reflux section 231. The dust collector 210 is provided with an air inlet 211 and an air outlet 212. The outlet end of the induced draft duct 230 communicates with the air inlet 211, and the inlet end of the induced draft fan 220 is connected to the air outlet 212.

[0025] Understandably, the material enters the furnace 100 through the feed inlet 120. The furnace 100 is equipped with a heating element 110 for heating the material. The material moves along the length of the furnace 100. During this process, the induced draft fan 220 starts, allowing outside air to enter the furnace 100 through the air inlet 140. The material completes the sintering process within the furnace 100 and is then discharged through the discharge outlet 130. The induced draft fan 220 drives air to enter through the air inlet 140 and exit through the feed inlet 120. The air carries dust away from the furnace 100 and enters the dust collector 210 through the induced draft duct 230 for dust removal.

[0026] Reference Figure 3 and Figure 4 In this embodiment, since the exhaust pipe 230 is provided with a return section 231, and a baffle 232 is provided in the return section 231, materials with larger particle diameters can be blocked by the baffle 232 and flow back along the return section 231 to the feed inlet 120 of the furnace 100, and re-enter the furnace 100 for sintering and utilization.

[0027] Understandably, during large particle experiments, nucleation easily occurs during product synthesis, generating microparticles (particle size less than 0.5µm), and friction between products during sintering also easily produces microparticles. Introducing these microparticles into the final product can easily lead to unqualified particle size distribution, requiring collection and disposal to ensure the product's particle size specifications are met. The material particles retained by baffle 232 are larger, meet product specifications, and can be recycled, reducing waste.

[0028] After the material is sintered, it needs to be cooled before it can enter the next stage. Since the air inlet 140 and the discharge port 130 are both located at the same end of the furnace 100, the material discharged after sintering can come into contact with the cold air entering through the air inlet 140 to achieve a cooling effect. The air heated by the material enters the interior of the furnace 100 so that the material in the middle of the furnace 100 or at one end of the feed port 120 can undergo a sintering reaction, achieving the effect of heat source recovery and utilization, and reducing energy consumption.

[0029] Reference Figure 3 In some embodiments, the dust collection assembly 200 further includes a rotary drive component 240, the output shaft of which is connected to a baffle 232. Under the driving action of the rotary drive component 240, the baffle 232 rotates within the return section 231. This configuration allows the baffle 232 to more effectively block materials of acceptable particle size, further reducing the amount of acceptable raw material entering the dust collector 210, thereby further improving material utilization and reducing raw material waste.

[0030] In some embodiments, the rotary drive component 240 is disposed outside the air duct 230 and located at the upper end of the return section 231. The dust suppression assembly also includes a rotary shaft 233, a baffle 232 connected to the outer periphery of the rotary shaft 233, the rotary shaft 233 extending along the extension direction of the return section 231, and the upper end of the rotary shaft 233 extending upward from inside the return section 231 and connected to the output shaft of the rotary drive component 240 located outside the air duct 230.

[0031] Understandably, this arrangement allows for a more rational layout of the rotary drive component 240 and protects it from dust entering the component and causing malfunctions.

[0032] In some embodiments, the rotary drive component 240 is a motor. The rotary drive component 240 can be mounted on a structural beam in the workshop and fixed in place by a triangular bracket.

[0033] Reference Figure 3 and Figure 5In some embodiments, the dust suppression assembly 200 further includes a seal 234, which is disposed on the outer periphery of the rotating shaft 233 and connected to the outer wall of the exhaust duct 230. It is understood that by providing the seal 234, leakage of dust from the openings of the exhaust duct 230 through the rotating shaft 233 can be prevented, further improving the dust recovery rate and preventing pollution of the surrounding environment.

[0034] In this embodiment, the sealing element 234 is a mechanical seal. The mechanical seal is a sealing structure that is already available in the art. It consists of components such as a dynamic ring, a stationary ring, a sealing ring, a spring clamping element, a spring seat, and screws. Its structure and principle should be clear to those skilled in the art, and will not be described in detail here.

[0035] In some embodiments, the baffle 232 is arranged in a spiral shape along the extension direction of the reflux section 231, and materials with qualified particle size can be refluxed back to the feed inlet 120 along the spiral baffle 232 for reuse, making the reflux process smoother.

[0036] In some embodiments, the reflux section 231 is vertically arranged, which is more conducive to the return of particulate material to the feed inlet 120 after being blocked by the baffle 232. Of course, the reflux section 231 can also be inclined.

[0037] In some embodiments, the dust collection assembly 200 further includes a collection bag. The lower end of the dust collector 210 has a dust outlet 213, and the collection bag is disposed below the dust outlet 213 and detachably connected to the dust collector 210. It is understood that dust is separated from the air by the dust collector 210 and discharged into the collection bag through the dust outlet 213, which facilitates the collection and transport of the dust to subsequent recycling equipment for disposal.

[0038] It is understood that the collection bag can be a cloth bag, a plastic bag, etc., and no specific limitation is made here. The collection bag can be detachably installed below the dust outlet 213 by means of hooks, screws, etc., to collect the dust discharged through the dust outlet 213.

[0039] Reference Figure 3 In some embodiments, a dust outlet valve 214 is provided at the dust outlet 213. The dust outlet valve 214 can open or close the dust outlet 213. After the dust outlet valve 214 is opened, dust can enter the collection bag through the dust outlet 213. The dust outlet valve 214 can be a rotary valve, etc.

[0040] Reference Figure 2In some embodiments, the rotary system further includes a discharge valve 131, which is connected to the furnace 100 and located at the discharge port 130. The discharge valve 131 is used to open or close the discharge port 130. It is understood that by controlling the frequency of opening of the discharge valve 131, the sintered material can be quantitatively fed from the discharge port 130 into the downstream process.

[0041] It is understandable that the discharge valve 131 can be a rotary valve, etc.

[0042] Reference Figure 1 In some embodiments, the rotary kiln system further includes a drive mechanism 300, the output end of which is connected to the furnace 100 to drive the furnace 100 to rotate. It is understood that the rotational axis of the furnace 100 extends along the length of the furnace 100. The heating element 110 continuously provides heat to the interior of the furnace 100, while the drive mechanism 300 provides rotational power to the furnace 100. The rotation of the furnace 100 makes the heat inside the furnace 100 more uniform, thereby enabling the material inside the furnace 100 to undergo dynamic sintering.

[0043] In some embodiments, the drive mechanism 300 includes a motor and a transmission component. The transmission component can be a gear transmission component, a belt transmission component, etc., which are not specifically limited here. After the motor starts, the output shaft of the motor transmits power to the furnace 100 through the transmission component, thereby realizing the rotation of the furnace 100.

[0044] Reference Figure 1 and Figure 2 In some embodiments, the rotary kiln system also includes a support roller 500, which is located below the furnace 100 and can provide support for the furnace 100 so that the furnace 100 can rotate smoothly.

[0045] Reference Figure 1 and Figure 6 In some embodiments, the rotary kiln system further includes a feeding assembly 400. The feeding assembly 400 includes a feeding bin 410, an arch-breaking component 420, and a feeding component 430. The outlet end of the feeding bin 410 is connected to the inlet end of the feeding component 430. The arch-breaking component 420 is disposed within the feeding bin 410, and the outlet end of the feeding component 430 is connected to the feed inlet 120. It is understood that the material is first stored in the feeding bin 410. The arch-breaking component 420 breaks up the arches in the feeding bin 410 to prevent material blockage in the bridge within the feeding bin 410. Then, the feeding component 430 quantitatively delivers the material to the feed inlet 120. After entering the furnace 100, the material undergoes sintering.

[0046] It is understandable that the feeding component 430 can be a feed screw conveyor.

[0047] When sintering materials using the rotary kiln system of this embodiment, the materials are first stored in the feed hopper 410, and then conveyed to the furnace 100 by the feed assembly 400. The drive mechanism 300 drives the furnace 100 to rotate, and the heating component 110 continuously provides heat to the interior of the furnace 100, achieving dynamic sintering of the materials. After the materials are sintered, the opening frequency of the discharge valve 131 is controlled to allow the materials to quantitatively enter the downstream process from the discharge port 130.

[0048] During the sintering process, air enters from the air inlet 140 of the furnace 100 and comes into contact with the material. It then enters the induced draft pipe 230 from the feed inlet 120. To prevent a large amount of material from being carried into the dust collector 210 due to excessive induced draft velocity, the rotary drive component 240 is activated, causing the baffle 232 to rotate within the reflux section 231. The material settles in the spiral channel formed by the baffle 232 and falls back to the feed inlet 120 of the furnace 100. The fallen material then enters the furnace 100 for sintering. This improves material utilization and reduces waste while ensuring product quality.

[0049] Powder particles that do not meet the size requirements are carried by the airflow into the dust collector 210. Under the action of the dust collector 210, they are discharged into the collection bag through the dust outlet 213, preventing the dust from being directly emitted into the atmosphere. The powder collected in the collection bag is then centrally disposed of.

[0050] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A rotary kiln system, characterized in that, include: The furnace (100) is provided with a feed inlet (120), a discharge outlet (130) and an air inlet (140). The feed inlet (120) and the discharge outlet (130) are respectively located at both ends of the furnace (100) along the length direction, and the air inlet (140) is located at the end of the furnace (100) where the discharge outlet (130) is located. The dust collection assembly (200) includes a dust collector (210), an induced draft fan (220), an induced draft duct (230), and a baffle (232). The induced draft duct (230) has a return section (231) at its inlet. The lower end of the return section (231) is connected to the feed inlet (120). The baffle (232) is located in the return section (231) and is used to guide the material to fall back to the feed inlet (120) along the return section (231). The dust collector (210) has an air inlet (211) and an air outlet (212). The outlet end of the induced draft duct (230) is connected to the air inlet (211), and the inlet end of the induced draft fan (220) is connected to the air outlet (212).

2. The rotary kiln system according to claim 1, characterized in that, The dust suppression assembly (200) further includes a rotary drive component (240), the output shaft of which is connected to the baffle (232) to drive the baffle (232) to rotate within the return section (231).

3. The rotary kiln system according to claim 2, characterized in that, The rotary drive component (240) is located outside the air duct (230) and at the upper end of the return section (231). The dust suppression assembly (200) also includes a rotary shaft (233). The baffle (232) is connected to the outer periphery of the rotary shaft (233). The rotary shaft (233) extends along the extension direction of the return section (231). The upper end of the rotary shaft (233) extends out of the return section (231) and is connected to the output shaft of the rotary drive component (240).

4. The rotary kiln system according to claim 3, characterized in that, The dust suppression assembly (200) also includes a seal (234), which is disposed on the outer periphery of the rotating shaft (233) and connected to the outer wall of the air duct (230).

5. The rotary kiln system according to claim 1, characterized in that, The baffle (232) is spirally arranged along the extension direction of the return section (231).

6. The rotary kiln system according to claim 1, characterized in that, The recirculation section (231) is set in the vertical direction.

7. The rotary kiln system according to claim 1, characterized in that, The dust collection assembly (200) also includes a collection bag. The dust collector (210) has a dust outlet (213) at its lower end. The collection bag is located below the dust outlet (213) and is detachably connected to the dust collector (210).

8. The rotary kiln system according to claim 1, characterized in that, The rotary kiln system also includes a discharge valve (131), which is connected to the furnace (100) and located at the discharge port (130) to open or close the discharge port (130).

9. The rotary kiln system according to claim 1, characterized in that, The rotary kiln system also includes a drive mechanism (300), the output end of which is connected to the furnace (100) to drive the furnace (100) to rotate.

10. The rotary kiln system according to claim 1, characterized in that, The rotary kiln system also includes a feeding assembly (400), which includes a feeding bin (410), an arch-breaking component (420), and a feeding component (430). The outlet end of the feeding bin (410) is connected to the inlet end of the feeding component (430). The arch-breaking component (420) is located inside the feeding bin (410), and the outlet end of the feeding component (430) is connected to the feed inlet (120).

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