CN110771929A - Stepped redrying system - Google Patents

Abstract

The invention relates to a stepped rebaking system. The drying functional area includes a plurality of drying processes, the cooling functional area includes a cooling process, and the moisturizing functional area includes a plurality of moisturizing processes; a conveying mesh belt for each drying process and a conveying mesh belt for the cooling process and the conveyor mesh belt of the moisture regaining process are not on the same plane; a first tobacco leaf unloading and loosening device is set between the first drying process and the second drying process, and between the first moisture regaining process and the second moisture regaining process The second tobacco leaf unloading and loosening device. In this technical scheme, through the setting of the tobacco leaf unloading and loosening device, the tobacco leaves undergo the unloading and loosening process after the first drying process and after the first moisturizing process, so that the layered tobacco leaves are loosened and the gap is enlarged, which is convenient for heat dissipation. The transfer or contact of atomized water can not only improve the uniformity of drying, but also ensure the uniform moisture content of tobacco leaves after moisture regain.

Description

A step-by-step rebake system

technical field

The invention belongs to the technical field of tobacco leaf redrying equipment, in particular to a stepped redrying system.

Background technique

The existing tobacco leaf redrying process is to heat, dry, cool and then re-moisture the first-cured tobacco leaves to control the moisture content of the tobacco leaves within a certain range, so as to facilitate long-term storage and alcoholization of the tobacco leaves.

At present, most of the rebaking equipment at home and abroad are tunnel-type mesh belt conveying rebake machines, all of which dry materials by convection heat transfer. It consists of a cooling zone, a first moisture regain zone and a second moisture regain zone. In the prior art rebaking equipment, the length of each process is several tens of meters, and it is set on a plane. Large workshops, and in the production process, the movement of operators for inspection is relatively large, so some production lines have to specially equip operators with vehicles for inspection, which increases production costs.

During the redrying process of tobacco leaves, the leaves are dried in several drying areas, and the moisture content of the tobacco leaves is reduced from 20% to 8%-10%. The whole process of cooling and moisturizing is carried out on the conveyor mesh belt relatively statically with a thickness of 80-100mm, resulting in poor uniformity of drying, cooling and moisture regaining. The upper tobacco layer has the lowest moisture content, the lower layer has the lowest moisture content, and the middle layer has the highest moisture content, which leads to the subsequent moisture regaining process, under the action of the common moisture regaining airflow, resulting in layered tobacco leaves. The moisture content in the vertical direction is different, and the quality of the tobacco cut after storage and alcoholization cannot be guaranteed.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a step-type redrying system to solve the problem of uneven water content in the vertical direction of the tobacco leaf layer during the redrying process of tobacco leaves.

Another object of the present invention is to reduce the floor space of the redrying system, and reduce the cost and workload of the operator.

The present invention is achieved through the following technical solutions:

A stepped rebaking system includes a drying functional area, a cooling functional area and a moisturizing functional area;

The drying functional area, the cooling functional area and the moisture regaining functional area are not on the same plane.

The drying functional area includes a first drying process, a second drying process, and a third drying process;

The cooling functional area includes a cooling process;

The moisturizing functional area includes a first moisturizing process and a second moisturizing process;

The first drying process, the second drying process, the third drying process, the cooling process, the first moisturizing process and the second moisturizing process are sequentially connected;

The first conveying mesh belt in the first drying process, the second conveying mesh belt in the second drying process, the third conveying mesh belt in the third drying process, the fourth conveying mesh belt in the cooling process, and the The sixth conveyor mesh belts of the second moisture regaining process are not on the same plane;

A first unloading and loosening device is provided between the first drying process and the second drying process, and a second unloading and loosening device is provided between the first moisturizing process and the second moisturizing process.

A third unloading and loosening device is provided between the second drying process and the third drying process.

A fourth unloading and loosening device is provided between the third drying process and the cooling process.

The structures of the first unloading and loosening device, the second unloading and loosening device, the third unloading and loosening device, and the fourth unloading and loosening device are all the same.

The first tobacco leaf turning device is a discharge loosening roller or a stepped loosening device.

The fourth conveyor mesh belt of the first cooling process and the fifth conveyor mesh belt of the first moisturizing process are on the same horizontal plane.

A first heating device and a first exhaust device are included in the first drying process, and the first heating device and the first exhaust device are respectively arranged above and below the first conveying mesh belt.

In the second drying process, a second heating device and a second exhaust device are included, and the second heating device and the second exhaust device are respectively arranged above and below the second conveying mesh belt.

A third heating device and a third exhaust device are included in the third drying process, and both the third heating device and the third exhaust device are arranged above the third conveying mesh belt.

The beneficial effects of the present invention are:

In this technical scheme, through the setting of the tobacco leaf unloading and loosening device, the tobacco leaves undergo a loosening process after the first drying process and after the first moisturizing process. The transfer of heat or the contact of atomized water can not only improve the uniformity of drying, but also ensure the uniform moisture content of tobacco leaves after moisture regain.

The technical solution reduces the floor space of the rebaking system by vertically arranging each process in the three-dimensional space, reduces the operator's inspection workload, and effectively reduces the production cost.

Description of drawings

FIG. 1 is a schematic structural diagram of the step-type rebaking system of the present invention.

Description of reference numerals

1 input port, 2 drying function area, 3 cooling function area, 4 moisture regain function area, 21 first drying process, 211 first conveying mesh belt, 212 first heating device, 213 first exhaust device, 22 second drying process , 221 second conveyor belt, 222 second heating device, 223 second exhaust device, 23 third drying process, 231 third conveyor belt, 232 third heating device, 233 third exhaust device, 24 first Tobacco leaf unloading and loosening device, 25 The third tobacco leaf unloading and loosening device, 26 The fourth tobacco leaf unloading and loosening device, 311 The fourth conveyor mesh belt, 41 The first moisturizing process, 411 The fifth conveyor mesh belt, 42 The second tobacco leaf unloading Loosening device, 43 second moisturizing process, 431 sixth conveyor mesh belt.

Detailed ways

The technical solutions of the present invention will be described in detail by the following examples. The following examples are only exemplary, and can only be used to explain and illustrate the technical solutions of the present invention, but cannot be construed as limitations on the technical solutions of the present invention.

As shown in FIG. 1 , the stepped rebake system of the present application includes a drying functional area 2, a cooling functional area 3 and a moisturizing functional area 4, wherein the drying functional area includes three drying processes, the cooling functional area includes a cooling process, and the moisturizing functional area includes The functional area includes two resurgence processes. In other embodiments of the present application, if there are two drying processes, the technical solution of the present application can also be realized.

The redrying system of the present application sequentially includes a first drying process 21, a second drying process 22, a third drying process 23, a cooling process, a first moisturizing process 41 and a second moisturizing process 43 from the input port 1 of the tobacco leaves. Same as the prior art refrigerated system.

In the rebaking system of the present application, it also includes other components for realizing the redefining work. However, in the technical solution claimed in the present application, the remaining components are not improved. Therefore, in the technical solution of the present application , the rest of the components will not be explained, but it does not mean that the rebaking system has only the parts mentioned below, but a comprehensive description is not given.

One end of the first drying process 21 is connected to the tobacco leaf input system, so that the tobacco leaves to be redried enter the redrying system. A first conveying mesh belt 211 is included in the first drying process, which is used for supporting the equal-recured tobacco leaves and driving the movement of the to-be-recured tobacco leaves. A first heating device 212 is arranged above the first conveying mesh belt. In the technical solution of the present application, the first heating device is the prior art, and any device that can realize heating for the first drying process can satisfy the technology of the present application program needs. As for the structure of the heating device, the prior art shall prevail.

Below the first conveying mesh belt, a first exhaust device 213 is arranged to discharge the moisture evaporated from the tobacco leaves. In this embodiment, the first exhaust device is an exhaust port with a solenoid valve , the setting of the first exhaust device here is because in the first drying process, the moisture in the tobacco leaves is relatively high. During the drying process, a large amount of moisture will enter the area of the first drying process. The exhaust port is arranged below the conveyor mesh belt, so that the gas flow direction in the first drying process is from top to bottom, and the gas with higher water content will be discharged downward with the air flow through the exhaust port, and the air flow with the upper part will be reduced. The hot air flow is mixed to improve the drying efficiency.

At the rear end of the first drying process, a first tobacco leaf unloading and loosening device 24 is provided. In the present application, the function of the first tobacco leaf unloading and loosening device is to lay the tobacco leaves on the conveyor belt in the passing condition. The thickness of the tobacco leaf layer is 80mm-100mm. After passing through the device, the tobacco leaf layer is loosened, and the gap in the middle part of the tobacco leaf layer is increased, and the circulation of heat is improved to dry the tobacco leaf in the middle of the tobacco leaf layer.

The first tobacco leaf unloading and loosening device is a unloading and loosening roller or a stepped loosening device. If it is a unloading and loosening device, in other embodiments of the present application, the structures and working principles of all tobacco leaf unloading and loosening devices are the same. The introduction will not be repeated later.

The second drying process 22 includes a second conveying mesh belt 221 for supporting the equal-cured tobacco leaves and driving the movement of the to-be-cured tobacco leaves. In this embodiment, the plane of the second conveyor mesh belt is lower than the plane of the first conveyor mesh belt. Such a structure can realize the setting and function of the tobacco leaf unloading and loosening device, and ensure that the tobacco leaf laying layer enters from the first process. The drop required for loosening in the second step. A second heating device 222 is arranged above the second conveying mesh belt. In the technical solution of the present application, the heating device is the prior art, and any device that can be implemented to heat the second drying process can meet the requirements of the technical solution of the present application. need. As for the structure of the heating device, the prior art shall prevail.

Below the second conveying mesh belt, a second exhaust device 223 is arranged to discharge the moisture evaporated from the tobacco leaves. In this embodiment, the second exhaust device is an exhaust port with a solenoid valve , the setting of the exhaust device here is because in the second drying process, the moisture in the tobacco leaves is relatively high. During the drying process, a large amount of moisture will enter the area of the second drying process. Here The exhaust port is arranged below the second conveying mesh belt, so that the gas flow direction in the second drying process is from top to bottom, and the gas with higher water content will be discharged downward through the exhaust port with the airflow, and the gas flow in the second drying process will be reduced. The hot air above is mixed to improve drying efficiency.

A third tobacco leaf unloading and loosening device 25 is provided at the rear end of the second drying process, and the third tobacco leaf unloading and loosening device is the same as the first tobacco leaf unloading and loosening device at the rear end of the first drying process.

The third drying process 23 includes a third conveying mesh belt 231 for supporting the re-cured tobacco leaves and driving the movement of the to-be-re-cured tobacco leaves. In this embodiment, the plane of the third conveyor mesh belt is lower than the plane of the second conveyor mesh belt. Such a structure can realize the setting and function of the tobacco leaf unloading and loosening device, and ensure that the tobacco leaf laying layer enters from the second process. The drop required for loosening in the third step. A third heating device 232 is arranged above the third conveying mesh belt. In the technical solution of the present application, the heating device is the prior art, and any device that can be implemented to heat the third drying process can meet the requirements of the technical solution of the present application. need. As for the structure of the heating device, the prior art shall prevail.

Above the third conveying mesh belt, a third exhaust device 233 is arranged to discharge the moisture evaporated from the tobacco leaves. In this embodiment, the exhaust device is an exhaust port with a solenoid valve. The setting of the exhaust device is because after the drying of the first two processes, the moisture content in the tobacco leaves is close to the moisture content requirements of redrying drying, and in the first two processes, because of the evaporation of water and the content of the tobacco leaves The evaporation of some substances that have an adverse effect on cigarettes leads to an increase in the brittleness of the tobacco leaves. In this technical solution, the exhaust device and the heating device are both arranged above the third conveyor belt. At this time, in the third drying area The humidity of the gas is relatively high, that is, it can achieve a certain degree of drying, and at the same time, it will also have a certain moisturizing function, which can reduce the brittleness of tobacco leaves and reduce the loss of tobacco leaves at the same time of drying.

At the rear end of the third drying process, a fourth tobacco leaf unloading and loosening device 26 is also provided. In other embodiments of the present application, the fourth tobacco leaf unloading and loosening device may not be provided at the rear end of the process. The fact that the tobacco leaf unloading and loosening process is not performed will correspondingly reduce the damage to the tobacco leaves, and the use of the fourth tobacco leaf unloading and loosening device can loosen the tobacco leaf layer and improve the cooling efficiency, which can be set here as required.

In the system of the present application, the cooling device is the existing technology, and no technical improvement has been made. Therefore, the structure, function and working principle of this process are not described, but this does not mean that this process is not required, and this process is still It constitutes an important part of the rebake system of the present application.

In the technical solution of the present application, the fourth conveying mesh belt 311 in the cooling process and the fifth conveying mesh belt 411 in the first moisturizing process are on the same level. The technical scheme of combining five conveyor belts into one conveyor belt.

In the first moisturizing process, it also includes at least a water mist adding device, which is used for moisturizing and humidifying the tobacco leaves. The water mist adding device is arranged above the conveying mesh belt. In the water mist adding device, the control of the adding amount of water mist is equal It belongs to the prior art and will not be described in detail here.

A second tobacco leaf unloading and loosening device 42 is arranged at the rear end of the first moisturizing process, and its structure and working principle are the same as the previous first tobacco leaf unloading and loosening device.

The second moisturizing process includes at least the sixth conveying mesh belt 431 and a water mist adding device, wherein the water mist adding device is arranged above the sixth conveying mesh belt, and the surface of the sixth conveying mesh belt is located below the fifth conveying mesh belt. The set drop is convenient for the operation of the second tobacco leaf unloading and loosening device.

The setting of the second tobacco leaf unloading and loosening device here is because in the first moisturizing process, the added water mist has sufficient moisture regain for the tobacco leaves on the surface above or below the tobacco leaf layer. Partial wetting hinders the entry of water vapor into the middle of the tobacco leaf layer. The second tobacco leaf unloading and loosening device has a certain loosening effect on the tobacco leaf layer, thereby increasing the entry of water vapor and improving the uniformity of moisture regain.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, and substitutions can be made in these embodiments without departing from the principle and spirit of the invention and variations, the scope of the present invention is defined by the appended claims with full equivalents.

Claims (10)

1. A step type redrying system is characterized by comprising a drying functional area, a cooling functional area and a moisture regaining functional area;

the drying functional area, the cooling functional area and the moisture regaining functional area are not on the same plane.

2. The stepped redrying system of claim 1, wherein the drying function comprises a first drying process, a second drying process, a third drying process;

the cooling functional area comprises a cooling process;

the moisture regaining functional area comprises a first moisture regaining process and a second moisture regaining process;

the first drying step, the second drying step, the third drying step, the cooling step, the first moisture regaining step, and the second moisture regaining step are connected in this order;

the first conveying mesh belt of the first drying procedure, the second conveying mesh belt of the second drying procedure, the third conveying mesh belt of the third drying procedure, the fourth conveying mesh belt of the cooling procedure and the sixth conveying mesh belt of the second dampening procedure are not on the same plane;

a first unloading and loosening device is arranged between the first drying procedure and the second drying procedure, and a second unloading and loosening device is arranged between the first moisture regaining procedure and the second moisture regaining procedure.

3. The stepped redrying system of claim 2, wherein a third discharge loosening apparatus is provided between the second drying pass and the third drying pass.

4. Stepped redrying system according to claim 2 or 3, characterized in that a fourth discharge loosening apparatus is provided between the third drying process and the cooling process.

5. The stepped redrying system of claim 4, wherein said first discharge and loosening device, said second discharge and loosening device, said third discharge and loosening device, and said fourth discharge and loosening device are all structurally identical.

6. The stepped redrying system of claim 5, wherein said first tobacco leaf turning device is a discharge loosening roller or a stepped loosening device.

7. The stepped redrying system of claim 2, wherein the fourth conveyer belt of the first cooling step is on the same horizontal plane as the fifth conveyer belt of the first moisture regain step.

8. The stepped redrying system of claim 2, comprising a first heating device and a first exhaust device in the first drying step, said first heating device and said first exhaust device being disposed above and below said first conveyor belt.

9. The stepped redrying system of claim 2, comprising a second heating device and a second exhaust device in the second drying step, said second heating device and said second exhaust device being disposed above and below said second conveyor belt.

10. The stepped redrying system of claim 2, comprising a third heating device and a third exhaust device in the third drying step, both said third heating device and said third exhaust device being disposed above said third conveyor belt.

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