A layered drying device for waste secondary tobacco leaves

Abstract

The utility model relates to a kind of waste tobacco leaf layered drying device in tobacco leaf drying technical field, comprising: drying cabin, its inside is separated by physical separation structure and has high temperature zone, medium temperature zone and low temperature zone;Conveying system, it includes hollow mesh belt arranged in the inside of drying cabin, for conveying tobacco leaf sequentially through high temperature zone, medium temperature zone and low temperature zone;Disturbance component, it is arranged above the hollow mesh belt of high temperature zone and medium temperature zone, including rotatable horizontal shaft and flexible paddle installed on horizontal shaft, for poking tobacco leaf to prevent caking;Hot air circulation system, including sequentially connected air supply unit, air return unit and dehumidifier, the dehumidifier is connected with the first end of air supply unit;The utility model divides drying cabin into high temperature zone, medium temperature zone and low temperature zone, surface water film is quickly broken through high temperature zone, then internal moisture is evaporated at uniform speed after medium temperature zone, finally, after low temperature zone, slow speed is shaped, reduce tobacco leaf burnt paste rate.

Description

Technical Field

[0001] This utility model relates to the field of tobacco leaf drying technology, and in particular to a layered drying device for waste and substandard tobacco leaves. Background Technology

[0002] Large-scale drying of waste tobacco leaves (such as tobacco stems, broken leaves and low-grade tobacco leaves) is the core technology for the recycling of tobacco resources.

[0003] However, existing drying equipment generally uses a drying drum (such as the ginkgo leaf drying device disclosed in patent publication number CN210425868U), which continuously rotates the drum to tumble the leaves and achieve uniform drying. However, this device still has the following drawbacks: 1. The drying temperature needs to be adjusted according to different time periods to prevent the leaves from scorching; 2. It cannot operate continuously, that is, it needs to dry in batches; 3. In the later stages of drying, since the leaves are already relatively dry, the continuous rotation of the drum causes the leaves to tumble, which can easily cause the leaves to break.

[0004] To address this, we designed a layered drying device for waste tobacco leaves. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, this utility model discloses a layered drying device for waste tobacco leaves.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A layered drying device for waste tobacco leaves includes:

[0008] The drying chamber is internally divided into high-temperature zone, medium-temperature zone and low-temperature zone by a physical partition structure;

[0009] The conveying system includes a perforated mesh belt located inside the drying chamber for conveying tobacco leaves sequentially through a high-temperature zone, a medium-temperature zone, and a low-temperature zone.

[0010] The disturbance component, located above the perforated mesh belt in the high-temperature and medium-temperature zones, includes a rotatable horizontal axis and a flexible paddle mounted on the horizontal axis, used to agitate the tobacco leaves to prevent clumping.

[0011] A hot air circulation system includes an air supply unit, a return air unit, and a dehumidifier connected in sequence, wherein the dehumidifier is connected to the first end of the air supply unit;

[0012] The drying chamber has a feed inlet at the top corresponding to the high-temperature zone and a discharge outlet at the bottom corresponding to the low-temperature zone.

[0013] Furthermore, the high-temperature zone, medium-temperature zone, and low-temperature zone are horizontally distributed along the length of the drying chamber;

[0014] The physical partition structure is a vertical partition with a channel through which the perforated mesh belt passes.

[0015] Furthermore, the length ratio of the high-temperature zone, the medium-temperature zone, and the low-temperature zone is 1:2:1.

[0016] Furthermore, the air supply unit includes:

[0017] Air supply ducts;

[0018] Three air supply duct groups are connected sequentially from front to back along the air supply duct line and are respectively installed at the top of the low temperature zone, medium temperature zone and high temperature zone;

[0019] Three blowers are installed in front of the three air supply duct groups, one for each of them;

[0020] Three heaters are installed one-to-one between the blower and the air duct assembly.

[0021] Furthermore, the high-temperature zone, medium-temperature zone, and low-temperature zone are vertically distributed from top to bottom along the drying chamber;

[0022] The physical separation structure is a horizontal partition, and guide vanes are provided at the ends of the high-temperature zone and the medium-temperature zone.

[0023] Furthermore, the perforated mesh belt is provided in three parts, which are horizontally arranged in the high temperature zone, the medium temperature zone and the low temperature zone respectively.

[0024] Furthermore, the three perforated mesh belts are driven in a coordinated manner, with a transmission speed ratio of 2:1:2.

[0025] Furthermore, the air supply unit includes:

[0026] Air supply ducts;

[0027] The three air supply duct groups are all connected to the air supply pipeline through valves and are respectively installed at the top of the high temperature zone, medium temperature zone and low temperature zone;

[0028] The blower is located at the beginning of the air supply duct;

[0029] Three heaters of different power are installed in front of the air supply duct assembly, one for each.

[0030] Furthermore, the return air unit includes:

[0031] The return air duct is connected to the dehumidifier at its end;

[0032] Three return air duct groups are connected to the return air pipeline and are respectively located in the high temperature zone, medium temperature zone and low temperature zone.

[0033] Furthermore, the air supply duct assembly is located above the perforated mesh conveyor section, and the air outlets of the air supply duct assembly in the high-temperature zone and the medium-temperature zone face the working area of ​​the flexible lever.

[0034] Compared with the prior art, the beneficial effects of this utility model are:

[0035] 1. The drying chamber is divided into a high-temperature zone, a medium-temperature zone and a low-temperature zone. The surface water film is quickly broken through the high-temperature zone, the internal moisture is evaporated at a uniform rate through the medium-temperature zone, and finally the tobacco leaves are slowly shaped through the low-temperature zone, which reduces the scorching rate of the tobacco leaves.

[0036] 2. The flexible paddle actively rotates and disperses the tobacco leaves in the high-temperature and medium-temperature zones, and combined with the directional airflow of the air supply duct, it prevents the tobacco leaves from clumping; at the same time, the flexible contact of the flexible paddle and the absence of disturbance components in the low-temperature zone ensure the physical integrity of the tobacco leaves.

[0037] 3. The return air unit allows hot air to be processed and recycled through a dehumidifier, reducing energy consumption compared to traditional direct-vent heat pump drying. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the first structure of this utility model;

[0039] Figure 2 This is a schematic diagram of the second structure of this utility model;

[0040] Figure 3 This is a schematic diagram of the first structure of the hot air circulation system in this utility model;

[0041] Figure 4 This is a schematic diagram of the second structure of the hot air circulation system in this utility model.

[0042] In the diagram: 1. Drying chamber; 11. High-temperature zone; 12. Medium-temperature zone; 13. Low-temperature zone; 14. Physical separation structure; 15. Feed inlet; 16. Discharge outlet; 17. Guide plate; 2. Conveying system; 21. Hollow mesh belt; 3. Disturbance component; 31. Horizontal axis; 32. Flexible deflector; 4. Hot air circulation system; 41. Air supply unit; 411. Air supply pipeline; 412. Air supply duct assembly; 413. Blower; 414. Heater; 42. Return air unit; 421. Return air pipeline; 422. Return air duct assembly; 43. Dehumidifier. Detailed Implementation

[0043] The present invention will be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if terms such as "upper", "lower", "front", "rear", "left", "right" indicate orientation or positional relationship, they are only corresponding to the drawings of this application for the convenience of describing the present invention. It should be understood that if terms such as "end", "side", "end portion", "side part", "lateral", "longitudinal", etc. indicate orientation or positional relationship, they are only corresponding to the length and width of the corresponding component. That is, "end" indicates the head and tail area in the length direction of the corresponding component, and "side part" indicates the head and tail area in the width direction of the corresponding component. They are used for the convenience of describing the present invention and do not indicate or imply that the device or element referred to must have a specific orientation.

[0044] Example 1, in conjunction with Appendix Figure 1 and 3 A layered drying device for waste tobacco leaves, comprising:

[0045] The drying chamber 1 has two physical partition structures 14 (such as vertical partitions) spaced along its length, dividing the chamber into a high-temperature zone 11, a medium-temperature zone 12, and a low-temperature zone 13. The high-temperature zone 11 utilizes high temperature to rapidly evaporate the free water on the surface of the tobacco leaves, preventing initial adhesion and quickly reducing the overall moisture content. The medium-temperature zone 12 is the main dehydration and drying stage, used to remove most of the bound water. The purpose of the low-temperature zone 13 is to further homogenize the moisture, making the moisture inside and outside the tobacco leaves tend to be balanced, and lowering the temperature of the tobacco leaves, thus achieving the goal of both drying the tobacco leaves and preventing them from scorching.

[0046] Furthermore, a rectangular channel is opened in the middle of the vertical partition for the perforated mesh belt 21 to pass through.

[0047] Preferably, the length ratio of the high-temperature zone 11, the medium-temperature zone 12, and the low-temperature zone 13 is 1:2:1.

[0048] Specifically, the top of the drying chamber 1 is provided with a feed inlet 15 at the beginning of the high temperature zone 11, and the bottom is provided with a discharge outlet 16 at the end of the low temperature zone 13.

[0049] As needed, both the inlet 15 and the outlet 16 are equipped with sealing doors that can be opened and closed.

[0050] The conveying system 2 includes a perforated mesh belt 21, conveying rollers, and a conveying motor located inside the drying chamber 1. The perforated mesh belt 21 passes through the high-temperature zone 11, the medium-temperature zone 12, and the low-temperature zone 13 in one pass. The conveying motor drives the conveying rollers to rotate, so that the perforated mesh belt 21 rotates and conveys the tobacco leaves through the high-temperature zone 11, the medium-temperature zone 12, and the low-temperature zone 13 in sequence.

[0051] The disturbance component 3, the high-temperature zone 11 and the medium-temperature zone 12 are each equipped with multiple horizontal shafts 31, and each horizontal shaft 31 is welded with multiple flexible paddles 32 (such as silicone material) along its circumference. The horizontal shafts 31 are driven by a geared motor (not shown in the figure), and the rotation direction is opposite to the direction of the conveyor belt, which is used to agitate the tobacco leaves to prevent them from clumping.

[0052] The hot air circulation system 4 includes an air supply unit 41, a return air unit 42 and a dehumidifier 43 connected in sequence. The dehumidifier 43 is connected to the first end of the air supply unit 41 to form a closed loop.

[0053] Air supply unit 41 includes:

[0054] The air supply duct 411 is connected to a set of air supply duct groups 412 at its front, middle and rear sections, respectively located at the top of the low temperature zone 13, the medium temperature zone 12 and the high temperature zone 11.

[0055] Specifically, the air supply duct assembly 412 is composed of multiple steel pipes with air outlets, the air outlets facing the working area of ​​the flexible lever 32.

[0056] Each air supply duct group 412 is equipped with a blower 413 and a heater 414 at its front end. The airflow delivered by the blower 413 is heated by the heater 414 and flows backward.

[0057] Specifically, the blower 413 and the heater 414 are installed on the air supply duct 411, meaning that the airflow entering the medium temperature zone 12 is accelerated twice by the blower 413 and heated twice by the heater 414.

[0058] Return air unit 42 includes:

[0059] Each temperature zone has a return air duct group 422 at the bottom, which is connected to the dehumidifier 43 via return air duct line 421.

[0060] Preferably, the outer casing of the return air duct assembly 422 is provided with a filter screen (not shown in the figure).

[0061] Work process: The cleaned waste tobacco leaves are evenly spread onto the perforated mesh belt 21 through the feed inlet 15 and enter the high temperature zone 11. The hot air in the high temperature zone 11 penetrates the tobacco leaf layer from top to bottom, and the flexible paddle 32 rotates to break up the clumps of tobacco leaves. Then the waste tobacco leaves enter the medium temperature zone 12 for continuous dehydration, and then pass through the low temperature zone 13 for slow drying. After drying, the waste tobacco leaves are discharged from the discharge outlet 16.

[0062] Example 2, in conjunction with Appendix Figure 2 and 4 A layered drying device for waste tobacco leaves. Because the drying chamber 1 in Embodiment 1 is arranged in a straight line, resulting in a longer length and larger footprint, this embodiment differs from Embodiment 1 in the following ways:

[0063] The drying chamber 1 has two physical partition structures 14 (such as horizontal partitions) arranged vertically inside, dividing it into an upper high-temperature zone 11, a middle medium-temperature zone 12, and a lower low-temperature zone 13.

[0064] Among them, the horizontal baffle is provided with a guide plate 17 at the end of the high temperature zone 11 and the medium temperature zone 12 to guide the tobacco leaves to fall onto the next layer of hollow mesh belt 21.

[0065] Each of the high-temperature zone 11, medium-temperature zone 12, and low-temperature zone 13 is equipped with an independent perforated mesh belt 21. The three independent perforated mesh belts 21 are connected by a transmission component such as a sprocket set, with a transmission speed ratio of 2:1:2.

[0066] Air supply unit 41 includes:

[0067] The air supply duct 411 is connected to a blower 413 at the first end and to three branch pipes at the end via a four-way valve. The three branch pipes are connected to three sets of air supply duct groups 412 respectively. The three sets of air supply duct groups 412 are respectively located in the high temperature zone 11, the medium temperature zone 12 and the low temperature zone 13.

[0068] Each branch pipe is equipped with a heater 414.

[0069] It should be noted that the three heaters 414 have different heating powers, corresponding to the high temperature zone 11, the medium temperature zone 12, and the low temperature zone 13 respectively, from highest to lowest.

[0070] The parts of this utility model not described in detail are prior art. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that this utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the above embodiments should be regarded as exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended to include all changes that fall within the meaning and scope of the equivalents of the claims in this utility model, and no reference numerals in the claims should be regarded as limiting the content of the claims.

Claims

1. A layered drying device for waste tobacco leaves, characterized in that, include: The drying chamber (1) is divided into a high-temperature zone (11), a medium-temperature zone (12) and a low-temperature zone (13) by a physical partition structure (14). The conveying system (2) includes a perforated mesh belt (21) located inside the drying chamber (1) for conveying tobacco leaves through a high-temperature zone (11), a medium-temperature zone (12) and a low-temperature zone (13) in sequence. The disturbance component (3) is arranged above the perforated mesh belt (21) in the high temperature zone (11) and the medium temperature zone (12), including a rotatable horizontal shaft (31) and a flexible paddle (32) installed on the horizontal shaft (31) for stirring the tobacco leaves to prevent clumping. The hot air circulation system (4) includes an air supply unit (41), a return air unit (42) and a dehumidifier (43) connected in sequence, wherein the dehumidifier (43) is connected to the first end of the air supply unit (41); The drying chamber (1) has a feed inlet (15) at the top corresponding to the high temperature zone (11) and a discharge outlet (16) at the bottom corresponding to the low temperature zone (13).

2. The waste tobacco leaf layer drying device according to claim 1, characterized in that: The high-temperature zone (11), medium-temperature zone (12) and low-temperature zone (13) are horizontally distributed along the length of the drying chamber (1); The physical partition structure (14) is a vertical partition and has a channel through which the hollow mesh belt (21) passes.

3. The waste tobacco leaf layer drying device according to claim 2, characterized in that: The length ratio of the high-temperature zone (11), the medium-temperature zone (12), and the low-temperature zone (13) is 1:2:

1.

4. The waste tobacco leaf layer drying device according to claim 2, characterized in that: The air supply unit (41) includes: Air supply duct (411); Three air supply duct groups (412) are connected sequentially from front to back along the air supply duct (411) and are respectively arranged on the top of the low temperature zone (13), the medium temperature zone (12) and the high temperature zone (11); Three blowers (413) are installed in front of three air supply duct groups (412) in a corresponding manner; Three heaters (414) are installed one-to-one between the blower (413) and the air duct assembly (412).

5. The waste tobacco leaf layer drying device according to claim 1, characterized in that: The high-temperature zone (11), medium-temperature zone (12) and low-temperature zone (13) are vertically distributed from top to bottom along the drying chamber (1); The physical separation structure (14) is a horizontal partition, and a guide plate (17) is provided at the end of the high temperature zone (11) and the medium temperature zone (12).

6. The waste tobacco leaf layer drying device according to claim 5, characterized in that: The hollow mesh belt (21) is provided in three parts, which are horizontally arranged in the high temperature zone (11), the medium temperature zone (12) and the low temperature zone (13).

7. The waste tobacco leaf layer drying device according to claim 6, characterized in that: The three hollow mesh belts (21) are driven in a coordinated manner, and the transmission speed ratio is 2:1:

2.

8. A layered drying device for waste tobacco leaves according to claim 5, characterized in that: The air supply unit (41) includes: Air supply duct (411); The three air supply duct groups (412) are all connected to the air supply duct (411) through valves and are respectively installed at the top of the high temperature zone (11), the medium temperature zone (12) and the low temperature zone (13); A blower (413) is installed at the beginning of the air supply duct (411); Three heaters (414) with different power are installed in front of the air supply duct assembly (412).

9. A layered drying device for waste tobacco leaves according to claim 4 or 8, characterized in that: The return air unit (42) includes: The return air duct (421) is connected to the dehumidifier (43) at its end. Three return air duct groups (422) are connected to the return air duct (421) and are respectively located in the high temperature zone (11), the medium temperature zone (12) and the low temperature zone (13).

10. A layered drying device for waste tobacco leaves according to claim 4 or 8, characterized in that: The air supply pipe assembly (412) is located above the material conveying section of the hollow mesh belt (21), and the air outlets of the air supply pipe assembly (412) in the high temperature zone (11) and the medium temperature zone (12) face the working area of ​​the flexible lever (32).

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