JPS61219366A - Drying of tobacco leaves and mushroom - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for drying leaf tobacco, shiitake mushrooms, etc., and more specifically to a drying method in which drying by conventional heating and dehumidification and drying by reduced pressure are carried out in parallel. It is.

[Conventional technology]

A conventional drying method for leaf Kuba C1 shiitake mushrooms, etc. includes circulating bulk drying.

This is done by forcibly blowing hot air heated by a burner into the drying chamber using a fan, and when the air in the drying chamber has absorbed enough moisture from the tobacco, etc. It discharges heat and humidity.

[Problems that fh Ming tries to solve]

M-ring bulk drying is an excellent drying method in terms of productivity, labor-saving, and economic efficiency, but on the other hand, excessive heating of hot air causes the nine-leaf tobacco to wilt, and the hot air is forced to dry. Due to the blowing of air and the forced discharge of warm l11ja, there were problems such as the release of aroma and oil components that affect the aroma and taste of cigarettes, which turned out to be very red.

The present invention was made in view of the above-mentioned problems, and its purpose is to further improve drying efficiency by using relatively low-temperature hot air and uniformly distributing the hot air, and to prevent green wilt and flaking. To provide a drying method that prevents overdrying and deterioration of aroma and taste.

[Means for solving problems]

The gist of the present invention, which solves the above-mentioned problems, is to connect a pressure reduction mechanism and a heating mechanism to a drying chamber, and to operate the pressure reduction mechanism when necessary to exhaust the air in the drying chamber, thereby maintaining a predetermined differential pressure in the chamber. When the pressure drops to , warm air heated by the heating mechanism is sucked into the drying chamber, and after raising the pressure inside the drying chamber to a certain level, the intake of hot air is stopped to reduce the temperature and humidity inside the drying chamber. Leaf tobacco is dried by expelling 111 m of air from the drying chamber to reduce the pressure in the drying chamber until the pressure drops to the predetermined pressure again while replacing it with wind, and repeating a series of steps in which the temperature of the air is lowered in parallel while drying under reduced pressure. This is in the method of drying shiitake mushrooms, etc.

[Effect]

In this invention, when the depressurization mechanism is activated, the air in the drying chamber is exhausted and the atmospheric pressure in the chamber is reduced to create a vacuum drying effect, and when the pressure in the chamber is reduced to a predetermined atmospheric pressure, warm air is sucked in. The conventional drying method is carried out in parallel with a method in which the interior air pressure is increased, and warm air is evenly distributed and filled in the room to repeatedly perform heating and dehumidification to promote the production of aromatic flavor. This increases drying efficiency.

〔Example〕

Figures '141 to 7 show an example of a leaf tobacco drying apparatus according to the method of the present invention. In the figure, (1) is a drying room, (2) is a boiler room connected to the bottom of the drying room (1), and (3) is a hand-operated exhaust valve installed above the drying room (1). (4) is an air supply valve that connects the drying room (1) and the boiler room (2), (5) is a vacuum pump that discharges and depressurizes the air in the drying room (1), and (6) is the boiler room ( 2) A burner that heats the air inside, (7) is a certain inner frame installed opposite the inner wall of the drying chamber (1), and (8) is a certain inner frame installed at a certain interval between the inner frames (7). The restored book 41@Keyaki, (9) is Jori Keyaki (8
) The gap between each other is the perforated floor plate formed at the upper part of the interface between the drying room (1) and the boiler room (2) and the middle part of the drying room (1). The opening/closing door formed in the lth room (1), @ is the damper installed in the boiler room (2) K, (to) is the stack that is operated when opening and closing the exhaust valve (3), the taste is the spring, and 4 is the spring U4 The pressure rod, a, which is pulled by and presses the air supply valve (4) in the closing direction, is connected to the drying chamber (1).
) Leaf tobacco is placed within.

In the leaf tobacco drying apparatus constructed as shown in Figs. 1 to 3, the air in the drying chamber (1) is
), and if this state continues for a while, the pressure in the drying chamber (1) will be reduced in response to the pressing force of the pressure rod (toward) caused by the spring α4 acting on the air supply valve (4). As the suction power exceeds, the air supply valve (4)
is opened and hot air is sucked into the drying room U) from the boiler room (2). Furthermore, when the air pressure inside the drying chamber (1) rises to some extent due to the intake of the hot air, the pressing force of the pressure rod (6) exceeds again and the air supply valve (4) closes, stopping the intake of hot air. Here, the air d sucked into the drying chamber (1) absorbs moisture from the tobacco a, and is replaced by hot air newly sucked in from the air supply valve (4) while being discharged by the vacuum pump (5). In the tobacco drying process, which involves repeating the above series of steps, the air in the boiler room (2) is heated by the burner (6), and the air supply valve (4) is closed. When the air pressure in the drying chamber (1) is reduced, the hot air heated by the burner (6) is naturally discharged from the damper@, and the pressure inside the boiler room (2) is always kept constant. The atmospheric pressure is preferably at least 0.9″AA pressure, and the hot air in the boiler room (2) is preferably about 38°C to 70°C. Further, the exhaust valve (3) and the air supply valve (4) are opened and closed manually during normal drying when the vacuum pump (5) is not operating, and when the vacuum pump (5) is operating. The exhaust valve (3) is kept closed, and the air supply valve (4) is opened and closed depending on the pressure difference between the drying chamber (1) and the boiler chamber (2) as described above.

Next, the means for yielding leaf tobacco to the drying apparatus according to this embodiment will be explained.

When collecting leaf tobacco O., first, drying room (1)
The opening/closing door (6) of the drying room (1) is opened, and the stalks of leaf tobacco are stored in the drying chamber (1) at right angles to the perforated floor plate QQ. After accommodating a certain value in this way, the guide frame (7
) in the darkness, and divide it into blocks by setting up a pot-stick (8) and at the same time horizontally placing a one-spaced frame (9) to divide it into square blocks.This operation is repeated until all the 1. Place the LI in the drying room (
1) By storing the warm air inside the drying chamber (1), the hot air is easily distributed and filled inside the drying chamber (1), and then the opening/closing door (b) is sealed.

〔Effect of the invention〕

As mentioned above, the uninvented method uses suction instead of forced air to supply warm air, which distributes hot air evenly into the drying chamber and fills the drying chamber to prevent uneven drying. By using wind efficiently, it is possible to prevent deterioration in flavor and aroma, and to obtain productivity equivalent to or higher than conventional methods.

In addition, in the method of the present invention, the temperature and humidity are forcibly discharged, so that the efficiency of moisture drainage can be significantly increased compared to the conventional method.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway perspective view showing an embodiment of the leaf tobacco drying device according to the present invention, Fig. 2 is a vertical sectional view of the drying device shown in Fig. J1, and Fig. -sg sectional perspective view showing the drying device, Fig. 4 is a main part sectional view showing the method of storing leaf tobacco in the drying chamber, and Figs. 5 to 7 are dL-diagrams showing auxiliary tools used when storing leaf tobacco. . (1): Drying room (2): Boiler room (3): Exhaust valve (4): Air supply valve (5): Vacuum valve (6
): Burner OQ: Relative who has permission to possess leaf tobacco False RN Haruyo Osamu Tojima Ministry Department 4 Figure 3 Procedural Amendment (Voluntary) April 1985, April 3, Relationship with the case of the person making the amendment 4 Authorized Literary Figure 2 Figure 3 o41 4s

Claims (1)

[Claims] 1) A pressure reduction mechanism and a heating mechanism are connected to the drying chamber, and the pressure reduction mechanism is activated when necessary to discharge air from the drying chamber, thereby reducing the air pressure in the chamber to a negative pressure, and reducing the air pressure in the drying chamber. When the pressure has dropped to a predetermined level, hot air heated by the heating mechanism is sucked into the drying chamber, and after the air pressure inside the drying chamber has reached a certain level, the hot air intake is stopped.
While replacing the temperature and humidity in the drying room with warm air, the temperature and humidity in the drying room is discharged until the pressure drops to the specified level again, the pressure in the room is reduced, and a series of steps is repeated in which the air is lowered in parallel while performing vacuum drying. A method for drying leaf tobacco, shiitake mushrooms, etc., which is characterized by drying by drying.