Drying mechanism of mica roasting kiln

Abstract

The utility model provides a drying mechanism of a mica roasting kiln, and belongs to the technical field of mica processing and production. The technical problems of poor drying effect, much heat waste and the like in the prior art are solved. The drying mechanism of the mica roasting kiln comprises a preheating channel arranged between a feeding port and a discharging port of the kiln, the preheating channel is connected with the feeding port through a roasting channel, the drying mechanism of the mica roasting kiln further comprises a feeding mechanism, and a first heating mechanism and a second heating mechanism are arranged in the preheating channel and the roasting channel respectively. A belt body on one side of an annular metal conveying belt of the feeding mechanism sequentially penetrates through a feeding port, a preheating channel, a roasting channel and a discharging port. And a moisture removal area is arranged at the top between the feeding end and the discharging end of the preheating channel. The drying device has the advantages of low energy consumption, good drying effect, high product quality and the like.

Description

Technical Field

[0001] This utility model belongs to the field of mica processing and production technology, and relates to kiln equipment, especially to a drying mechanism for a mica roasting kiln. Background Technology

[0002] In the processing of mica, the raw mica is usually roasted to remove the water of crystallization and obtain mica powder. Currently, mica roasting is mainly carried out in kilns, with the raw mica being transported to the roasting zone by conveyor belts for processing before the output mica powder product is produced.

[0003] In the existing technology, when mica raw materials are roasted, the water of crystallization is discharged into the air inside the furnace, which increases the humidity inside the furnace. This makes it easy for the water of crystallization to be not completely removed, which will affect the uniformity of the final product and thus cause defects in the quality of the final product.

[0004] When existing drying equipment is applied to mica calcining kilns, it usually discharges high-temperature and humid air while calcining, which not only has poor dehumidification effect but also wastes heat and affects production efficiency. Summary of the Invention

[0005] The purpose of this invention is to address the above-mentioned problems by providing an energy-efficient and high-performance drying mechanism for a mica calcining kiln.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a drying mechanism for a mica calcining kiln, comprising a preheating channel disposed between the inlet and outlet of the kiln, wherein the preheating channel is connected to the inlet through a calcining channel, and further comprising a feeding mechanism, wherein a first heating mechanism and a second heating mechanism are respectively disposed in the preheating channel and the calcining channel, and wherein one side of the annular metal conveyor belt of the feeding mechanism passes through the inlet, the preheating channel, the calcining channel and the outlet in sequence;

[0007] The top of the preheating channel between the feed end and the discharge end is provided with a first dehumidification zone. The first dehumidification zone is provided with a second dehumidification zone between the feed end and the discharge end. The distance between the top of the first dehumidification zone and the upper surface of the annular metal conveyor belt is greater than the distance between the second dehumidification zone and the upper surface of the annular metal conveyor belt.

[0008] The distance between the upper surface of the annular metal conveyor belt and the top of the feed end, and the distance between the upper surface of the annular metal conveyor belt and the top of the discharge end are both smaller than the distance between the second dehumidification zone and the upper surface of the annular metal conveyor belt.

[0009] By setting up dehumidification zone one and dehumidification zone two within the preheating channel, moisture can be removed while minimizing heat loss from the furnace body, achieving energy savings. Furthermore, the presence of dehumidification zone one and two dehumidification zones two within the preheating channel forms a multi-stage dehumidification system. This design helps to more effectively remove moisture generated during the drying process, improving drying efficiency. The distance between dehumidification zone one and the upper surface of the annular metal conveyor belt is greater than that between dehumidification zone two; this difference in distance helps to create better airflow circulation, further enhancing the dehumidification effect.

[0010] In the drying mechanism of the above-mentioned mica calcining kiln, the ratio of the distance between the top of the first dehumidification zone and the upper surface of the annular metal conveyor belt to the distance between the second dehumidification zone and the upper surface of the annular metal conveyor belt is 5:3.

[0011] The ratio of the distance between the second dehumidification zone and the upper surface of the annular metal conveyor belt to the distance between the upper surface of the annular metal conveyor belt and the top of the feed end is 5:1. This smaller spacing design helps maintain the stability of the material as it enters the preheating channel, reducing material spillage or displacement caused by airflow or mechanical vibration. Furthermore, the smaller spacing design helps reduce heat loss within the preheating channel, avoiding heat waste and thus reducing energy consumption.

[0012] In the drying mechanism of the aforementioned mica calcining kiln, the negative pressure exhaust ports at the top of exhaust zone one and exhaust zone two are both connected to a connecting pipe. This connecting pipe is connected to a negative pressure generator via a negative pressure pipe. An auxiliary negative pressure exhaust wheel is provided between the negative pressure pipe and the connecting pipe, and this auxiliary negative pressure exhaust wheel is connected to an auxiliary motor (254). The ratio of the distance between the top of exhaust zone one and the upper surface of the annular metal conveyor belt to the length of exhaust zone one is 5:16. This reasonable ratio between the length of exhaust zone one and the top distance ensures that the material has sufficient residence time for dehumidification, which helps the moisture in the material to evaporate fully and be discharged, thereby improving drying efficiency.

[0013] In the drying mechanism of the aforementioned mica calcining kiln, the aperture of the negative pressure exhaust port at the top of exhaust zone one is larger than that of the negative pressure exhaust port at the top of exhaust zone two. The larger aperture of the negative pressure exhaust port helps to create a stronger negative pressure zone in exhaust zone one, thereby guiding hot air and moisture to be discharged more effectively through the exhaust port and optimizing the airflow organization within the preheating channel.

[0014] In the drying mechanism of the aforementioned mica calcining kiln, transition slopes are provided between the top surfaces of the feed end and the discharge end and the top surfaces of the adjacent dehumidification zones. These transition slopes help maintain the stability of the airflow within the preheating and calcining channels, reducing airflow interference caused by material entry and exit, thereby improving drying efficiency and dehumidification effect.

[0015] In the drying mechanism of the mica calcining kiln mentioned above, the first heating mechanism includes a number of first electric heating rods that are distributed along the length of the annular metal conveyor belt and arranged laterally, located in the preheating channel and below the upper side of the belt body.

[0016] The second heating mechanism includes second heating units disposed within the roasting channel and distributed along the length of the upper side of the annular metal conveyor belt, arranged in a staggered manner. Several first electric heating rods, distributed laterally along the length of the annular metal conveyor belt, ensure uniform heating of the material during preheating, avoiding localized overheating or underheating. The staggered design facilitates better circulation of hot air within the roasting channel, improving heat transfer efficiency and ensuring effective heating of the material. Simultaneously, the staggered heating units reduce heat loss to the surrounding environment, improving energy utilization efficiency.

[0017] In the drying mechanism of the aforementioned mica calcining kiln, the second heating unit includes several electric heating rods distributed laterally along the length of one side of the annular metal conveyor belt. The distribution of multiple electric heating rods along the annular metal conveyor belt ensures that heat is directly and quickly transferred to the material, improving heating efficiency.

[0018] In the drying mechanism of the aforementioned mica calcining kiln, the length ratio of the second heating unit to the lengths of dehumidification zone one and dehumidification zone two is 1:1:1. By ensuring the residence time of the material in the dehumidification zone, the moisture in the material can be removed more stably, thus ensuring the dehumidification effect.

[0019] In the drying mechanism of the aforementioned mica calcining kiln, a U-shaped heat insulation layer is provided between the preheating channel and the calcining channel and the kiln. This U-shaped heat insulation layer effectively prevents heat loss from the preheating channel and the calcining channel to the outside of the kiln, thereby improving heating efficiency and reducing energy consumption. Furthermore, the heat insulation layer helps maintain temperature stability within the preheating channel and the calcining channel, reducing the impact of changes in external ambient temperature on the drying and calcining processes.

[0020] In the drying mechanism of the mica calcining kiln mentioned above, the electric heating rod does not contact the upper or lower surface of the belt body on one side of the annular metal conveyor belt.

[0021] Alternatively, the electric heating rod located on the lower surface of the belt body on one side of the annular metal conveyor belt is coated with a ceramic layer, and the electric heating rod makes rolling contact with the lower surface of the annular metal conveyor belt. The electric heating rod does not contact the annular metal conveyor belt, thus avoiding direct friction between the two, reducing wear on the conveyor belt, and extending its service life. Direct rolling contact between the electric heating rod and the lower surface of the annular metal conveyor belt allows for a more compact structure and increases heat transfer efficiency.

[0022] In the drying mechanism of the aforementioned mica calcining kiln, the feeding mechanism includes a driving wheel and a driven wheel respectively located at the discharge port and the inlet. The driving wheel and the driven wheel are fitted with the annular metal conveyor belt, which is a continuous thin metal strip. The driving wheel is connected to a driving wheel driver. The annular metal conveyor belt is made of metal, possessing excellent wear resistance and durability, and can operate continuously for extended periods in high-temperature and high-humidity environments, ensuring system stability.

[0023] Compared with existing technologies, the drying mechanism of this mica calcining kiln has the following advantages: 1. A preheating channel is provided at the front end of the calcining channel, resulting in good drying effect. 2. The dehumidification mechanism is located in the preheating channel section, avoiding heat loss in the furnace, reducing energy consumption, and lowering operating costs. 3. The heating elements are evenly distributed, resulting in high drying uniformity and high final product quality. Attached Figure Description

[0024] Figure 1 This is a structural schematic diagram provided by this utility model.

[0025] Figure 2 This is a cross-sectional structural diagram provided by this utility model.

[0026] Figure 3 This is a schematic diagram of the discharge port structure provided by this utility model.

[0027] Figure 4 This is a schematic diagram of the structure from another angle provided by this utility model.

[0028] Figure 5 This is a schematic diagram of the electric heating rod structure provided by this utility model.

[0029] Figure 6 This is a cross-sectional structural diagram of Embodiment 2 provided by this utility model.

[0030] Figure 7 This is a schematic diagram of the electric heating rod structure according to Embodiment 2 of this utility model.

[0031] Figure 8 This is a schematic diagram of the electric heating rod structure in Embodiment 3 of this utility model.

[0032] In the diagram, the components are: kiln 1, feed inlet 11, discharge outlet 12, U-shaped heat insulation layer 13, preheating channel 2, feed end 21, discharge end 22, dehumidification zone one 23, dehumidification zone two 24, negative pressure dehumidification port 25, connecting pipe 251, negative pressure pipe 252, negative pressure dehumidification wheel 253, auxiliary motor 254, transition slope 26, first heating mechanism 27, first electric heating rod 28, calcination channel 3, second heating mechanism 31, second heating unit 32, second electric heating rod 33, feeding mechanism 4, annular metal conveyor belt 41, driving wheel 42, driven wheel 43, driving wheel driver 44, roller 45, rotary drive assembly 46, electric heating rod 5, ceramic rod body 51, and electric heating wire 52. Detailed Implementation

[0033] Example 1

[0034] like Figures 1 to 5 As shown, the drying mechanism of a mica calcining kiln includes a preheating channel 2 disposed between the inlet 11 and the outlet 12 of the kiln 1. The preheating channel 2 is connected to the outlet 12 through a calcining channel 3. The kiln also includes a feeding mechanism 4. A first heating mechanism 27 and a second heating mechanism 31 are respectively disposed in the preheating channel 2 and the calcining channel 3. The annular metal conveyor belt 41 of the feeding mechanism 4 passes through the inlet 11, the preheating channel 2, the calcining channel 3 and the outlet 12 in sequence.

[0035] The top of the preheating channel 2 between the feed end 21 and the discharge end 22 is provided with a dehumidification zone 1 23. A dehumidification zone 24 is provided between the dehumidification zone 1 23 and the feed end 21 and the discharge end 22 respectively. The distance between the top of the dehumidification zone 1 23 and the upper surface of the annular metal conveyor belt 41 is greater than the distance between the dehumidification zone 2 24 and the upper surface of the annular metal conveyor belt 41.

[0036] The distance between the upper surface of the annular metal conveyor belt 41 and the top of the feed end 21, and the distance between the upper surface of the annular metal conveyor belt 41 and the top of the discharge end 22 are both smaller than the distance between the dehumidification zone 24 and the upper surface of the annular metal conveyor belt 41.

[0037] In this embodiment, the mica raw material is heated by the first heating mechanism 27 and the second heating mechanism 31 set in the preheating channel 2 and the calcination channel 3, so that the crystal water escapes into the air inside the kiln 1. The low-heat moisture is discharged outside the furnace body through the negative pressure vent 25 by the dehumidification zone 23 and the dehumidification zone 24 set at the top of the preheating channel 2 for drying, which has the effect of saving heat and efficient dehumidification.

[0038] More specifically, the ratio of the distance between the top of the first dehumidification zone 23 and the upper surface of the annular metal conveyor belt 41 to the distance between the second dehumidification zone 24 and the upper surface of the annular metal conveyor belt 41 is 5:3;

[0039] The ratio of the distance between the dehumidification zone 24 and the upper surface of the annular metal conveyor belt 41 to the distance between the upper surface of the annular metal conveyor belt 41 and the top of the feed end 21 is 5:1.

[0040] More specifically, the ratio of the distance between the top of the dehumidification zone 23 and the upper surface of the annular metal conveyor belt 41 to the length of the dehumidification zone 23 is 5:16.

[0041] More specifically, the negative pressure exhaust port 25 at the top of exhaust zone 1 23 and the negative pressure exhaust port 25 at the top of exhaust zone 24 are both connected to the connecting pipe 251. The connecting pipe 251 is connected to the negative pressure generator through the negative pressure pipe 252. An auxiliary negative pressure exhaust wheel 253 is provided between the negative pressure pipe 252 and the connecting pipe 251. The auxiliary negative pressure exhaust wheel 253 is connected to the auxiliary motor 254.

[0042] In this embodiment, the aperture of the negative pressure exhaust port 25 at the top of the first exhaust zone 23 is larger than the aperture of the negative pressure exhaust port 25 at the top of the second exhaust zone 24.

[0043] More specifically, a transition slope 26 is provided between the top surface of the feed end 21 and the top surface of the discharge end 22 and the top surface of the adjacent dehumidification zone 24.

[0044] More specifically, the first heating mechanism 27 includes a plurality of first electric heating rods 28 that are distributed along the length of the preheating channel 2 and arranged laterally below the upper side of the annular metal conveyor belt 41.

[0045] The second heating mechanism 31 includes a second heating unit 32 disposed in the roasting channel 3 and distributed along the length of the upper side of the annular metal conveyor belt 41 and staggered vertically.

[0046] More specifically, the second heating unit 32 includes a plurality of second electric heating rods 33 distributed and arranged laterally along the length of the upper side of the annular metal conveyor belt 41.

[0047] like Figure 5 As shown, the first electric heating rod 28 and the second electric heating rod 33 include an electric heating rod 5, which includes a ceramic rod body 51, and an electric heating wire 52 is wound on the ceramic rod body 51.

[0048] More specifically, the length of the second heating unit 32 is in the ratio of the lengths of the first dehumidification zone 23 and the second dehumidification zone 24 to 1:1:1.

[0049] In this embodiment, the distance between the top of the first dehumidification zone 23 and the upper surface of the annular metal conveyor belt 41 is H1, the distance between the second dehumidification zone 24 and the upper surface of the annular metal conveyor belt 41 is H2, and the distance between the upper surface of the annular metal conveyor belt 41 and the top of the feed end 21 is H3.

[0050] The lengths of the first dehumidification zone 23, the second dehumidification zone 24, and the second heating unit 32 are equal and all are 1.6 meters. The length of the first dehumidification zone 23 is L1, the length of the second dehumidification zone 24 is L2, and the length of the second heating unit 32 is L3. The ratio of H1, H2, H3, L1, L2 and L3 is 5:3:1:16:16:16.

[0051] More specifically, a U-shaped heat insulation layer 13 is provided between the preheating channel 2 and the firing channel 3 and the kiln 1, respectively.

[0052] More specifically, the electric heating rod 5 does not contact the upper or lower surface of one side of the annular metal conveyor belt 41;

[0053] The feeding mechanism 4 includes a driving wheel 42 and a driven wheel 43 respectively disposed at the discharge port 12 and the inlet 11. An annular metal conveyor belt 41 is fitted onto the driving wheel 42 and the driven wheel 43. The annular metal conveyor belt 41 is a continuous thin metal strip. The driving wheel 42 is connected to the driving wheel driver 44. Several rollers 45 are provided at the bottom of the annular metal conveyor belt 41, and all rollers are connected to the rotary drive assembly 46.

[0054] The working principle of this embodiment is that the raw materials are continuously transported from the feed port 11 to the preheating channel 2 by the circulating annular metal conveyor belt 41, and then transported to the roasting channel 3 by the discharge end 22. Finally, the processed product is output from the discharge port 12.

[0055] During this process, the first heating mechanism 27 and the second heating mechanism 31 heat the raw material, causing the water of crystallization in the raw material to escape into the air inside the furnace. The moisture is then collected by the first dehumidification zone 23 and the second dehumidification zone 24 and discharged from the furnace body through the negative pressure dehumidification port 25, thus completing the drying process.

[0056] Example 2

[0057] The content of this embodiment is basically the same as that of embodiment one, except that: , as Figure 6 and 7 As shown, the electric heating rod 5 located on the lower surface of the belt body on one side of the annular metal conveyor belt 41 is covered with a ceramic layer, and the electric heating rod 5 is in rolling contact with the lower surface of the annular metal conveyor belt 41.

[0058] The working principle of this embodiment is that the electric heating rod 5 rolls in contact with the lower surface of the annular metal conveyor belt 41, which replaces the function of the roller shaft 45, making the structural design more compact and the heat can be better transferred to the raw materials, further improving the energy-saving effect.

[0059] Example 3

[0060] The content of this embodiment is basically the same as that of embodiment one, except that: Figure 8As shown, a reinforcing metal rod is added to the ceramic rod body 51.

[0061] The working principle of this embodiment is to add a reinforcing metal rod to the center of the ceramic rod 51, thereby solving the shortcomings of the ceramic rod 51 itself being brittle and having poor impact resistance. This makes it more durable and less prone to damage.

[0062] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0063] Although this document frequently uses terms such as kiln, feed inlet, discharge outlet, U-shaped insulation layer, preheating channel, feed end, discharge end, dehumidification zone one, dehumidification zone two, negative pressure dehumidification port, connecting pipe, negative pressure pipe, negative pressure dehumidification wheel, auxiliary motor, transition slope, first heating mechanism, first electric heating rod, firing channel, second heating mechanism, second heating unit, second electric heating rod, feeding mechanism, annular metal conveyor belt, driving wheel, driven wheel, driving wheel driver, roller shaft, rotary drive assembly, electric heating rod, ceramic rod body, and electric heating wire, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A drying mechanism of a mica baking kiln, characterized by comprising: The preheating channel (2) is connected with the discharge port (12) through the calcination channel (3), and the preheating channel (2) and the calcination channel (3) are respectively provided with first heating mechanisms (27) and second heating mechanisms (31). The top of the preheating channel (2) between the feeding end (21) and the discharging end (22) is provided with a first moisture removal area (23), and the first moisture removal area (23) is respectively provided with second moisture removal areas (24) between the feeding end (21) and the discharging end (22). The distance between the top of the feeding end (21) and the upper surface of the annular metal conveying belt (41) and the distance between the top of the discharging end (22) and the upper surface of the annular metal conveying belt (41) are both smaller than the distance between the second moisture removal area (24) and the upper surface of the annular metal conveying belt (41).

2. The drying mechanism of the mica calcination kiln according to claim 1, wherein, The ratio of the distance between the top of the first moisture removal area (23) and the upper surface of the annular metal conveying belt (41) to the distance between the second moisture removal area (24) and the upper surface of the annular metal conveying belt (41) is 5:

3. The ratio of the distance between the second moisture removal area (24) and the upper surface of the annular metal conveying belt (41) to the distance between the top of the feeding end (21) and the upper surface of the annular metal conveying belt (41) is 5:

1.

3. The drying mechanism of the mica calcination kiln according to claim 2, wherein, The ratio of the distance between the top of the first moisture removal area (23) and the upper surface of the annular metal conveying belt (41) to the length of the first moisture removal area (23) is 5:

16.

4. The drying mechanism of the mica calcination kiln according to claim 1, wherein The negative pressure moisture removal ports (25) at the top of the first moisture removal area (23) and the top of the second moisture removal area (24) are both connected to a communication pipe (251), the communication pipe (251) is connected to a negative pressure generator through a negative pressure pipe (252), an auxiliary negative pressure moisture removal wheel (253) is arranged between the negative pressure pipe (252) and the communication pipe (251), and the auxiliary negative pressure moisture removal wheel (253) is connected to an auxiliary motor (254).

5. The drying mechanism of the mica calcining kiln according to any one of claims 1-4, characterized in that, The top surfaces of the feeding end (21) and the discharging end (22) are respectively provided with transition inclined surfaces (26) between the top surfaces and the top surfaces of the adjacent second moisture removal areas (24).

6. The drying mechanism of the mica calcining kiln according to any one of claims 1-4, characterized in that, The first heating mechanisms (27) include a plurality of first electric heating rods (28) arranged in the preheating channel (2) and located below the upper side belt body of the annular metal conveying belt (41) and distributed along the length direction of the upper side belt body and arranged transversely. The second heating mechanisms (31) include second heating units (32) arranged in the calcination channel (3) and distributed along the length direction of the upper side belt body of the annular metal conveying belt (41) and arranged vertically.

7. The drying mechanism of the mica calcination kiln according to claim 6, wherein The second heating unit (32) comprises a plurality of second electric heating rods (33) distributed along the length direction of the upper side of the annular metal conveying belt (41) and arranged transversely.

8. The drying mechanism of the mica calcination kiln according to claim 6, wherein The length ratio of the second heating unit (32) to the length of the first moisture removal zone (23) and the second moisture removal zone (24) is 1:1:

1.

9. The drying mechanism of the mica calcination kiln according to claim 6, wherein, The preheating channel (2) and the baking channel (3) are respectively provided with a back-shaped heat insulation layer (13) between the kiln (1).

10. The drying mechanism of the mica calcination kiln according to claim 7, wherein The electric heating rod (5) does not contact the upper surface and the lower surface of the one side of the annular metal conveying belt (41). Alternatively, a ceramic layer is coated on the electric heating rod (5) located on the lower surface of the one side of the annular metal conveying belt (41), and the electric heating rod (5) is in rolling contact with the lower surface of the annular metal conveying belt (41).

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