Method for improving loosening efficiency of vacuum moisture regaining tobacco flakes

Abstract

The invention belongs to the technical field of tobacco processing, and relates to a method for improving the loosening efficiency of vacuum moisture regaining tobacco flakes, which comprises a vacuum moisture regaining module process, and the vacuum moisture regaining module process sequentially comprises the following steps of tobacco flake preparation, box opening and slicing, vacuum moisture regaining, box turning and feeding, loosening and moisture regaining and tobacco flake pre-preparation. In the vacuum moisture regaining step, the vacuumizing temperature is 14-16 DEG C, the vacuum degree delay is 15-25 seconds, the steaming temperature is 55-65 DEG C, the heat preservation time is 100-140 seconds, and the reverse vacuumizing time is 45-55 seconds; according to the method, the process is modified on the basis of the original process standard of vacuum moisture regaining, and after the vacuum degree reaches the standard value and is delayed for a certain time, subsequent procedures such as steaming and the like are carried out, so that the number of non-loose tobacco blocks is greatly reduced. Compared with an original vacuum moisture regaining process, the method has the advantages of being remarkable in effect and simple and easy to operate.

Description

Technical Field

[0001] The invention belongs to the technical field of tobacco processing and relates to a method for improving the loosening efficiency of vacuum-rehumidified tobacco sheets. Background Art

[0002] Vacuum rehumidification is the first process in cigarette production. It is used to treat tobacco leaves, increase their moisture and temperature, make them soft, and reduce breakage during processing. At the same time, vacuum rehumidification technology uses a vacuum environment to rehumidify tobacco to increase humidity and softness. In specific implementation, the vacuum rehumidification process uses a vacuum pump to extract air from a sealed box to form a negative pressure, which expands the gaps between tobacco leaf fibers and then injects saturated steam. Under the action of pressure difference, steam penetrates into the tobacco leaves, condenses to release latent heat and increase moisture, making the tobacco leaves soft and loose, reducing subsequent processing breakage, and removing green impurities. The vacuum rehumidification process has been used in cigarette production and processing technology. In recent years, with the demand for product intrinsic quality and tobacco leaf pest control, as well as the advancement of three-fluid vacuum rehumidification equipment technology, vacuum rehumidification technology has received more attention and application in the production and processing of cigarettes.

[0003] However, as the sensory quality of cigarette products increases, the demand for maintaining the original aroma of tobacco leaves and reducing the intensity of tobacco leaf processing has increased, and low-temperature loosening technology for tobacco leaves has emerged. Vacuum rehumidification also uses parameters such as one cycle, low vacuum degree, and low steaming temperature to reduce the intensity of processing and maintain the original aroma of tobacco leaves. Such low-intensity parameter settings lead to low repermeability and an increase in the number of agglomerated tobacco leaves; the processing of unloosened tobacco leaves is not in place, which is inconsistent with the processing of loosened tobacco leaves, resulting in the hidden danger of poor quality consistency.

[0004] Therefore, how to improve the vacuum moisture recovery and loosening efficiency and tap the potential of existing equipment has always been a technical issue of concern to tobacco manufacturers. Summary of the invention

[0005] The technical solution adopted by the present invention to solve the technical problem is: a method for improving the loosening efficiency of vacuum-rehumidified tobacco slices, comprising: a vacuum-rehumidification module process, the vacuum-rehumidification module process sequentially comprising the following steps: tobacco slice preparation step, unpacking and slicing step, vacuum-rehumidification step, box-turning and feeding step, loosening and rehumidification step, and tobacco slice pre-dispensing step;

[0006] In the vacuum rehumidification step, the vacuum temperature is 14-16°C;

[0007] In the vacuum rehumidification step, the vacuum delay is 15 to 25 seconds;

[0008] In the vacuum rehumidification step, the steaming temperature is 55-65°C;

[0009] In the vacuum rehumidification step, the holding time is 100 to 140 seconds;

[0010] In the vacuum rehumidification step, the back pumping time is 45 to 55 seconds.

[0011] Preferably, in the vacuum rehumidification step, the vacuum degree delay is 18 to 22 seconds.

[0012] Preferably, in the vacuum rehumidification step, the vacuuming temperature is 14.5-15.5°C.

[0013] Preferably, in the vacuum rehumidification step, the steaming temperature is 58-62°C;

[0014] In the vacuum rehumidification step, the holding time is 115 to 125 seconds;

[0015] In the vacuum rehumidification step, the back pumping time is 48 to 52 seconds.

[0016] Preferably, in the tobacco sheet pre-mixing step, the tobacco sheets are mixed with the tobacco sheets output from the loosening and rehumidification module process, and after mixing, the foreign matter removal step, the leaf feeding step, and the leaf matching and storage step are sequentially performed; in the foreign matter removal step, undispersed tobacco pieces are removed.

[0017] More preferably, the loosening and moistening module process includes in sequence: a tobacco sheet preparation step, an unpacking and slicing step, a pre-loosening step, and a loosening and moistening step.

[0018] The beneficial effects of the present invention are:

[0019] The present invention modifies the process based on the original process standard of vacuum rehumidification, and performs subsequent steaming and other procedures after a certain delay after the vacuum degree reaches the standard value, so that the number of unloosened cigarette blocks is greatly reduced; compared with the original vacuum rehumidification process, the present invention has the characteristics of significant effect and simple and easy operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The invention discloses a leaf loosening process flow chart for inventing a method for improving the loosening efficiency of vacuum rehumidification tobacco leaves. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the relevant technologies in the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] This embodiment aims at the current process parameter settings of low vacuum degree and low steaming temperature. According to the principle of vacuum rehumidification, a vacuum degree delay method is adopted. That is, after the vacuum suction reaches the set vacuum degree, it is maintained for a certain time to allow the air inside the block tobacco leaves to be further discharged, and then normal steaming is carried out to add steam and water to increase the temperature and rehumidify the tobacco leaves, so as to improve the recovery rate and loosening efficiency of vacuum rehumidification.

[0023] In this embodiment, the original process parameters of vacuum conditioning are compared with the process parameters of this embodiment as shown in Table 1 below:

[0024] Table 1

[0025] Serial number Process flow and parameters unit Example Setting Value 1 Duty Cycle indivual I 2 Vacuuming temperature ℃ 15 3 Vacuum Delay S 20 4 Steaming temperature ℃ 60 5 Insulation time S 120 6 Pullback time S 50

[0026] The equipment operation program is modified based on the original process standard of vacuum rehumidification. After the vacuum degree reaches the standard value, the equipment operation program is delayed for 20 seconds before starting subsequent steaming and other procedures. The key technical point of this embodiment is that after the set vacuum degree is reached, the vacuum degree is maintained for a certain period of time to allow the air inside the block tobacco leaves to be further continuously discharged. This embodiment modifies the process based on the original process standard of vacuum rehumidification. After the vacuum degree reaches the standard value, the equipment operation program is delayed for 20 seconds before starting subsequent steaming and other procedures. Measurements are carried out in actual production. The average amount of unloosened tobacco blocks is 66.49kg, which is 163.41kg less than the original vacuum rehumidification process before the process of the present invention is adopted, and the reduction is 71.08%. Compared with the original vacuum rehumidification process, the present invention has the characteristics of significant effect and simple and easy operation.

[0027] In summary, the present invention modifies the process based on the original vacuum rehumidification process standard, and performs subsequent steaming and other procedures after a certain delay after the vacuum degree reaches the standard value, so that the number of unloosened cigarette blocks is greatly reduced. Compared with the original vacuum rehumidification process, the present invention has the characteristics of significant effect and simple and easy operation.

[0028] It should be emphasized that the above are only preferred embodiments of the present invention and do not limit the present invention in any form. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A method for improving the loosening efficiency of vacuum rehumidification tobacco sheets, characterized in that: include: The vacuum rehumidification module process includes the following steps in sequence: a tobacco sheet preparation step, a box unpacking and sheet separation step, a vacuum rehumidification step, a box turning and feeding step, a loosening and rehumidification step, and a tobacco sheet pre-dispensing step; In the vacuum rehumidification step, the vacuuming temperature is 14-16°C; In the vacuum rehumidification step, the vacuum degree delay is 15 to 25 seconds; In the vacuum rehumidification step, the steaming temperature is 55-65°C; In the vacuum rehumidification step, the heat preservation time is 100 to 140 seconds; In the vacuum rehumidification step, the back pumping time is 45 to 55 seconds.

2. A method for improving the loosening efficiency of vacuum moisturizing tobacco sheets according to claim 1, characterized in that: In the vacuum rehumidification step, the vacuum degree delay is 18 to 22 seconds.

3. The method for improving the loosening efficiency of vacuum-rehumidified tobacco sheets according to claim 1, characterized in that: In the vacuum rehumidification step, the vacuuming temperature is 14.5-15.5°C.

4. The method for improving the loosening efficiency of vacuum-rehumidified tobacco sheets according to claim 1, characterized in that: In the vacuum rehumidification step, the steaming temperature is 58-62°C; In the vacuum rehumidification step, the holding time is 115 to 125 seconds; In the vacuum rehumidification step, the back pumping time is 48 to 52 seconds.

5. The method for improving the loosening efficiency of vacuum-rehumidified tobacco sheets according to claim 1, characterized in that: In the tobacco sheet pre-mixing step, the tobacco sheets are mixed with the tobacco sheets output from the loosening and rehumidification module process, and after mixing, the foreign matter removal step, the leaf feeding step, and the leaf matching and storage step are carried out in sequence; in the foreign matter removal step, undispersed tobacco pieces are removed.

6. A method for improving the loosening efficiency of vacuum-rehumidified tobacco sheets according to claim 5, characterized in that: The loosening and moisture-reinforcing module process sequentially includes: a tobacco sheet preparation step, an unpacking and slicing step, a pre-loosening step, and a loosening and moisture-reinforcing step.

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