Double-layer roller bed furnace

Abstract

The utility model discloses a double-layer roller way furnace which comprises an upper-layer kiln body, a lower-layer kiln body and a material transferring mechanism, the upper-layer kiln body is located above the lower-layer kiln body, the material transferring mechanism is used for transferring materials between the upper-layer kiln body and the lower-layer kiln body, and the upper-layer kiln body and the lower-layer kiln body are each provided with a conveying roller way. A preheating area, a drying area, a temperature rising area, a sintering area and a temperature lowering area are sequentially arranged in the conveying direction of the conveying roller way, the preheating area and the drying area are arranged on the upper-layer kiln body, the temperature rising area, the sintering area and the temperature lowering area are located on the lower-layer kiln body, a first partition plate is arranged between the upper-layer kiln body and the lower-layer kiln body, and a plurality of first vent holes are formed in the first partition plate. The device has the advantages of being high in heat utilization rate, small in occupied area and low in cost.

Description

Technical Field

[0001] This utility model relates to the field of kiln technology, specifically to a double-layer roller kiln. Background Technology

[0002] Traditional electric kilns typically employ a single-channel, unidirectional design, with the product sequentially passing through a heating zone, a sintering zone, and a cooling zone within the kiln. During this process, heating elements are distributed along both sides of the firing channel, responsible for providing the necessary heat to the product within the kiln. This type of electric kiln is widely used for sintering various materials, such as structural ceramics, functional ceramics, phosphors, rare earth materials, lithium battery materials (e.g., lithium cobalt oxide), magnetic materials, and nanomaterials. However, this type of electric kiln has a low heat utilization rate during heating, resulting in high energy consumption. Furthermore, a drying process is required before the sintering process, leading to a long overall length and a large footprint. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing technology and provide a double-layer roller furnace with high heat utilization rate, small equipment footprint and low cost.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A double-layer roller kiln includes an upper kiln body, a lower kiln body, and a material transfer mechanism. The upper kiln body is located above the lower kiln body. The material transfer mechanism is used to transfer materials between the upper and lower kiln bodies. Both the upper and lower kiln bodies are equipped with conveying rollers. Along the conveying direction of the conveying rollers, there are sequentially arranged a preheating zone, a drying zone, a heating zone, a sintering zone, and a cooling zone. The preheating zone and the drying zone are located in the upper kiln body, and the heating zone, the sintering zone, and the cooling zone are located in the lower kiln body. A first partition is provided between the upper and lower kiln bodies, and the first partition is provided with a plurality of first ventilation holes.

[0006] As a further improvement to the above technical solution:

[0007] The lower kiln body is longer than the upper kiln body. The cooling zone extends to the outside of the preheating zone. An exhaust device is provided on the cooling zone. The exhaust device is provided with a first air outlet mechanism and a second air outlet mechanism. The first air outlet mechanism is connected to the preheating zone, and the second air outlet mechanism is connected to the drying zone.

[0008] The first air outlet mechanism and the second air outlet mechanism are respectively connected to the top or side of the preheating zone and the drying zone.

[0009] The heating zone is provided with a first resistance wire heating assembly and a first silicon carbide rod heating assembly on both sides of the conveyor roller, with the first resistance wire heating assembly located above the first silicon carbide rod heating assembly.

[0010] The drying zone is equipped with a second resistance wire heating assembly on both sides of the conveyor roller conveyor.

[0011] The sintering zone is equipped with second silicon carbide rod heating components on both sides of the conveyor roller conveyor.

[0012] Temperature detection devices are provided in the preheating zone, drying zone, heating zone, sintering zone and cooling zone. The temperature detection devices are signal-connected to the control module. The control module is signal-connected to the first resistance wire heating assembly, the first silicon carbide rod heating assembly, the second resistance wire heating assembly, the second silicon carbide rod heating assembly and the exhaust device.

[0013] A second partition is provided between the upper kiln body and the first partition. The second partition has a plurality of second ventilation holes, which are staggered from the first ventilation holes on the horizontal plane.

[0014] Both the upper and lower kiln bodies are equipped with exhaust mechanisms, glue discharge mechanisms, and drainage mechanisms.

[0015] The inlet of the preheating zone is connected to a feeding mechanism, and the outlet of the cooling zone is connected to a discharging mechanism.

[0016] Compared with the prior art, the advantages of this utility model are:

[0017] The double-layer roller furnace disclosed in this utility model is divided into an upper kiln body and a lower kiln body, and a material transfer mechanism is used to realize the material transportation between the two. The preheating zone and drying zone are set in the upper kiln body, which can shorten the length of the roller furnace and reduce the overall footprint of the roller furnace. In addition, the heat in the heating zone and sintering zone of the lower kiln body can be transferred to the drying zone and preheating zone of the upper kiln body through the first vent on the first partition, so as to preheat and dry the material in the upper kiln body, improve the utilization efficiency of thermal energy, reduce the number of heating elements in the upper kiln body, and thus reduce equipment costs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of the double-layer roller furnace of this utility model.

[0019] Figure 2 This is a top view of the structure of the double-layer roller furnace of this utility model.

[0020] Figure 3 This is a cross-sectional structural diagram of the double-layer roller furnace of this utility model.

[0021] The labels in the diagram represent: 1. Upper kiln body; 2. Lower kiln body; 31. Material transfer mechanism; 32. Feeding mechanism; 33. Discharging mechanism; 4. Conveying roller conveyor; 5. Preheating zone; 6. Drying zone; 7. Heating zone; 8. Sintering zone; 9. Cooling zone; 10. First baffle; 11. Exhaust device; 111. First exhaust mechanism; 112. Second exhaust mechanism. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] In the description of this utility model, 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 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.

[0024] 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 utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0025] In this utility model, unless otherwise explicitly specified and limited, the terms "assembly," "connection," "joining," and "fixing" 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 or an electrical connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] Figures 1 to 3An embodiment of the double-layer roller furnace of this utility model is shown. The double-layer roller furnace of this embodiment includes an upper kiln body 1, a lower kiln body 2, and a material transfer mechanism 31. The upper kiln body 1 is located above the lower kiln body 2. The material transfer mechanism 31 is used to transfer the material between the upper kiln body 1 and the lower kiln body 2. Both the upper kiln body 1 and the lower kiln body 2 are provided with conveying rollers 4. Along the conveying direction of the conveying rollers 4, there are sequentially provided a preheating zone 5, a drying zone 6, a heating zone 7, a sintering zone 8, and a cooling zone 9. The preheating zone 5 and the drying zone 6 are located in the upper kiln body 1, and the heating zone 7, the sintering zone 8, and the cooling zone 9 are located in the lower kiln body 2. A first partition 10 is provided between the upper kiln body 1 and the lower kiln body 2. The first partition 10 is provided with a plurality of first ventilation holes 101.

[0027] This double-layer roller furnace consists of an upper kiln body 1 and a lower kiln body 2, with a material transfer mechanism 31 facilitating material transport between them. The preheating zone 5 and drying zone 6 are located in the upper kiln body 1, which shortens the length of the roller furnace and reduces its overall footprint. Furthermore, heat from the heating zone 7 and sintering zone 8 of the lower kiln body 2 can be transferred to the drying zone 6 and preheating zone 5 of the upper kiln body 1 through the first vent hole (not shown in the figure) on the first partition 10, preheating and drying the material in the upper kiln body 1. This improves the efficiency of heat energy utilization, reduces the number of heating elements in the upper kiln body 1, and thus lowers equipment costs. Specifically, the material transfer mechanism 31 includes a hoist device, etc.

[0028] Furthermore, in this embodiment, the lower kiln body 2 is longer than the upper kiln body 1, and the cooling zone 9 extends to the outside of the preheating zone 5. An exhaust device 11 is provided on the cooling zone 9, and the exhaust device 11 has a first air outlet mechanism 111 and a second air outlet mechanism 112. The first air outlet mechanism 111 is connected to the preheating zone 5, and the second air outlet mechanism 112 is connected to the drying zone 6. The exhaust device 11 extracts preheated heat from the cooling zone 9 and transports it to the preheating zone 5 and the drying zone 6 respectively through the first air outlet mechanism 111 and the second air outlet mechanism 112, improving the waste heat utilization rate and further reducing the number and cost of heating elements in the preheating zone 5 and the drying zone 6.

[0029] Furthermore, in this embodiment, the first air outlet mechanism 111 and the second air outlet mechanism 112 are respectively connected to the top or side of the preheating zone 5 and the drying zone 6. The heat transferred from the heating zone 7 and the sintering zone 8 preheats and dries the bottom of the material in the preheating zone 5 and the drying zone 6, while the heat in the first air outlet mechanism 111 and the second air outlet mechanism 112 dries the top or side of the material, increasing the heating range and improving the preheating and drying effect.

[0030] Furthermore, in this embodiment, the heating zone 7 is provided with a first resistance wire heating assembly and a first silicon carbide rod heating assembly on both sides of the conveyor roller 4, with the first resistance wire heating assembly located above the first silicon carbide rod heating assembly. The silicon carbide rod has better heat resistance than the resistance wire, and the resistance wire is cheaper. Using the silicon carbide rod ensures that the temperature of the heating zone 7 can reach the set temperature, and the supplementary resistance wire heating reduces the overall cost.

[0031] Furthermore, in this embodiment, the drying zone 6 is equipped with second resistance wire heating assemblies on both sides of the conveyor roller 4. Since the required set temperature of the drying zone 6 is lower than that of the heating zone 7, the required temperature can be achieved by using resistance wire heating, which has a lower cost, thus reducing the cost of the heating element.

[0032] Furthermore, in this embodiment, the sintering zone 8 is equipped with second silicon carbide rod heating assemblies on both sides of the conveyor roller 4. The silicon carbide rods have good heat resistance, ensuring that the temperature in the sintering zone 8 can reach the required sintering temperature.

[0033] Furthermore, in this embodiment, temperature detection devices are provided in the preheating zone 5, drying zone 6, heating zone 7, sintering zone 8, and cooling zone 9. These temperature detection devices are signal-connected to the control module, which in turn is signal-connected to the first resistance wire heating assembly, the first silicon carbide rod heating assembly, the second resistance wire heating assembly, the second silicon carbide rod heating assembly, and the exhaust device 11. The temperature detection devices can detect the temperature of each zone and transmit the data to the control module (not shown in the figure). The control module controls the heating temperatures of the first resistance wire heating assembly, the first silicon carbide rod heating assembly, the second resistance wire heating assembly, and the second silicon carbide rod heating assembly, as well as the exhaust volume of the exhaust device 11, to adjust the temperature of each zone and ensure that the material is preheated, dried, sintered, and cooled according to the set temperatures of each zone.

[0034] Furthermore, in this embodiment, a second partition is provided between the upper kiln body 1 and the first partition 10. The second partition has multiple second vent holes, which are staggered from the first vent holes 101 on the horizontal plane. Both the first partition 10 and the second partition (not shown in the figure) are actually covered with heat-insulating cotton, so that foreign objects in the upper kiln body 1 will not fall into the lower kiln body 2 through the first and second vent holes (not shown in the figure), ensuring the normal sintering of materials in the lower kiln body 2 and not affecting the passage of residual heat gas. In addition, the staggered arrangement of the second vent holes and the first vent holes on the horizontal plane can further prevent foreign objects from falling.

[0035] Furthermore, in this embodiment, both the upper kiln body 1 and the lower kiln body 2 are equipped with an exhaust mechanism, a glue discharge mechanism, and a drainage mechanism. The exhaust, glue discharge, and drainage in the upper kiln body 1 and the lower kiln body 2 can be controlled independently to avoid mutual interference.

[0036] Furthermore, in this embodiment, the inlet of the preheating zone 5 is connected to a feeding mechanism 32, and the outlet of the cooling zone 9 is connected to a discharging mechanism 33. The feeding mechanism 32 and the discharging mechanism 33, combined with the material transfer mechanism 31, can realize automatic material feeding and discharging, improving the degree of automation. Specifically, both the feeding mechanism 32 and the discharging mechanism 33 include a hoisting device and a feeding roller conveyor, etc.

[0037] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make many possible variations and modifications to the present invention, or modify it into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, should fall within the protection scope of the present invention.

Claims

1. A double-layer roller furnace, characterized in that: The system includes an upper kiln body (1), a lower kiln body (2), and a material transfer mechanism (31). The upper kiln body (1) is located above the lower kiln body (2). The material transfer mechanism (31) is used to transfer materials between the upper kiln body (1) and the lower kiln body (2). Both the upper kiln body (1) and the lower kiln body (2) are equipped with conveying roller conveyors (4). Along the conveying direction of the conveying roller conveyors (4), there are sequentially arranged a preheating zone (5), a drying zone (6), a heating zone (7), a sintering zone (8), and a cooling zone (9). The preheating zone (5) and the drying zone (6) are located in the upper kiln body (1). The heating zone (7), the sintering zone (8), and the cooling zone (9) are located in the lower kiln body (2). The temperature zone (9) is located in the lower kiln body (2). A first partition (10) is provided between the upper kiln body (1) and the lower kiln body (2). The first partition (10) is provided with a plurality of first ventilation holes. The length of the lower kiln body (2) is greater than that of the upper kiln body (1). The cooling zone (9) extends to the outside of the preheating zone (5). The cooling zone (9) is provided with an exhaust device (11). The exhaust device (11) is provided with a first air outlet mechanism (111) and a second air outlet mechanism (112). The first air outlet mechanism (111) is connected to the preheating zone (5), and the second air outlet mechanism (112) is connected to the drying zone (6).

2. The double-layer roller furnace according to claim 1, characterized in that: The first air outlet mechanism (111) and the second air outlet mechanism (112) are respectively connected to the top or side of the preheating zone (5) and the drying zone (6).

3. The double-layer roller furnace according to claim 2, characterized in that: The heating zone (7) is provided with a first resistance wire heating assembly and a first silicon carbide rod heating assembly on both sides of the conveying roller (4), with the first resistance wire heating assembly located above the first silicon carbide rod heating assembly.

4. The double-layer roller furnace according to claim 3, characterized in that: The drying zone (6) is equipped with a second resistance wire heating assembly on both sides of the conveyor roller (4).

5. The double-layer roller furnace according to claim 4, characterized in that: The sintering zone (8) is provided with a second silicon carbide rod heating assembly on both sides of the conveying roller (4).

6. The double-layer roller furnace according to claim 5, characterized in that: Temperature detection devices are provided in the preheating zone (5), drying zone (6), heating zone (7), sintering zone (8) and cooling zone (9). The temperature detection devices are connected to the control module. The control module is connected to the first resistance wire heating assembly, the first silicon carbide rod heating assembly, the second resistance wire heating assembly, the second silicon carbide rod heating assembly and the exhaust device (11).

7. The double-layer roller furnace according to any one of claims 1 to 6, characterized in that: A second partition is provided between the upper kiln body (1) and the first partition (10). The second partition is provided with a plurality of second ventilation holes, which are staggered from the first ventilation holes (101) on the horizontal plane.

8. The double-layer roller furnace according to any one of claims 1 to 6, characterized in that: Both the upper kiln body (1) and the lower kiln body (2) are equipped with an exhaust mechanism, a glue discharge mechanism and a drainage mechanism.

9. The double-layer roller furnace according to any one of claims 1 to 6, characterized in that: The inlet of the preheating zone (5) is connected to a feeding mechanism (32), and the outlet of the cooling zone (9) is connected to a discharging mechanism (33).

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