JPH0446917B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a fumigation treatment method and a fumigation box used when producing oxidized smoke in a tunnel furnace.

(Prior art) Conventionally, when producing ibushi wafer using a tunnel furnace, the trolley that came out of the firing zone was placed in the smoking box attachment/detachment chamber, the smoking box was placed over the trolley, and the smoker was smoked. Leave it as it is to allow natural cooling, and
The trolley, which has been cooled to around 450 degrees Celsius, is pulled into the fumigation box attachment and removal room again and the fumigation box is removed. However, in this conventional fumigation process, it takes a long time of 11 to 13 hours to cover the fumigation box and allow it to cool naturally while cutting off contact with the outside air. This also requires a lot of space to store the trolley during this time. In addition, after the trolley has been left to cool naturally, it is pulled into the smoking box attachment/removal chamber, the smoking box is removed, and then when the trolley is pulled outside, the temperature of 400 to 450°C is rapidly cooled by the outside air and cooled down. Cracks often occurred.

(Problems to be Solved by the Invention) The present invention solves the above-mentioned conventional problems, significantly reduces the time required for cooling after smoking compared to the conventional method, and also allows the smoking box to be attached and detached. This was completed with the aim of creating a fumigation treatment method and a fumigation box that eliminates the risk of cold cracks occurring when the trolley is pulled out of the room.

(Means for solving the problem) The above problem was solved by placing a double-walled fumigation box on top of a trolley loaded with firewood to carry out the fumigation process, and then surrounding it with the double walls of the fumigation box. The problem is solved by a fumigation treatment method characterized by introducing outside air into the internal space of the interior space and rapidly cooling it. In addition, the ceiling and side walls of the fumigation box for producing ibushi wafer are made of double walls, and dampers are installed on the ceiling and side walls to open and close the communication between the internal space of the double wall and the outside air. A fumigation box is used, which is characterized by having a. Furthermore, the above problem can be solved by installing a damper that can open and close communication with the outside air in the smoking box attachment/detachment chamber, and placing the cart after the smoking and cooling process into the smoldering box attachment/detachment chamber. The problem is solved by a fumigation processing method characterized by introducing outside air into the fumigation box attachment/detaching chamber after removing the box to perform rapid cooling, and then pulling out the cart from the fumigation box attachment/detachment chamber. be able to.

(Example) Next, the present invention will be described in more detail with reference to illustrated examples.

FIG. 1 is a sectional view of the fumigation processing apparatus used in the present invention, in which 1 is a truck, 2 is a box loaded on the truck 1, and 3 is a fumigation box for producing oxidized wood. The ceiling and side walls of this fumigation box 3 form an internal space 6 between an inner wall surface 4 and an outer wall surface 5 as shown in the figure.
It has a double-walled structure, and the ceiling and side walls are provided with ducts 7, 8 for communicating the interior space 6 with outside air, and dampers 9, 10 for opening and closing. ing. The inner wall surface 4 and the outer wall surface 5 are lined with a heat insulating material such as fiber having a thickness of approximately 25 mm to provide an appropriate heat retention effect.

The fumigation box 3 constructed in this way is placed over the top of the cart 1, which is heated to a temperature of about 950 to 1100 degrees Celsius as it is carried out from the firing zone of the tunnel furnace, and fumigation is performed by blowing a fumigating agent into the inside. During this time, the dampers 9 and 10 are closed and the internal space 6 is hermetically sealed. Therefore, the inside of the fumigation box 3 is kept sufficiently warmer than in the case of a conventional single-walled fumigation box, and preferable fumigation is performed. When the dampers 9 and 10 are opened to communicate the interior space 6 with outside air after the smoldering process is completed, the high temperature air in the interior space 6 is discharged from the damper 9 on the ceiling due to the chimney effect. On the other hand, outside air is introduced into the internal space 6 from the damper 10 on the side wall. As a result, the heat radiated from the room 2 is carried away to the outside air by the airflow in the cooled interior space 6, and the room 2 is rapidly cooled. Further, if necessary, cooling air can be injected from the damper 10 or internal air can be sucked out from the damper 9 while measuring the temperature. In this way, if a double-walled fumigation box 3 as shown in Figure 1 is used, the cooling time can be reduced by 30 to 40% to 7 to 10 hours compared to conventional natural cooling. This also makes it possible to reduce truck space by 30 to 40%. Furthermore, the area inside the fumigation box 3 is not exposed to the outside air at all, and fumigation is carried out in the same manner as in the past.

FIG. 2 is a cross-sectional view of the third invention, in which 11 is a fumigation box attachment/detachment chamber, 12 is a damper provided on the side wall 13, 14 is a damper provided on the ceiling 15, and 16 is the fumigation box. It is. The fumigation box 16 may have a double-walled structure as described above, but in the third invention, an ordinary fumigation box 16 as shown may also be used.

First, the trolley 1 pulled out from the firing zone of the tunnel furnace enters the inside of this fumigation box attachment/detachment chamber 11.
A fumigation box 16 is placed on the top surface. At this time, damper 1 is set so that cooling of ko 2 does not occur.
Close 2 and 14 to increase heat retention. After the cooling process, the trolley 1, which has reached a temperature of 400 to 450°C, is pulled into the fumigation box attachment/detachment chamber 11 again, and the fumigation box 16 is removed. 14 is opened and outside air is introduced into the fumigation box attachment/detachment chamber 11, the space 2 on the trolley 1 is rapidly cooled. This cooling can be carried out while maintaining a cooling speed that does not cause any risk of cold cracks, and if the trolley 1 is then pulled out of the fumigation box attachment/detachment chamber 11, the risk of cold cracks occurring can be completely eliminated. Note that outside air can be introduced by any method other than natural draft, such as forced ventilation of outside air or blowing in cold air.

(Effects of the Invention) As explained above, according to the first and second inventions, the cooling time after oxidation can be significantly shortened, and the number of fumigation boxes and trolley space can also be reduced. can be achieved. Further, according to the third aspect of the invention, it is possible to shorten the cooling time and prevent cracking due to cooling when the trolley is pulled out from the smoking box attachment/detachment chamber. Therefore, the present invention greatly contributes to industrial invention as a fumigation treatment method and a fumigation box that eliminate the problems of the conventional methods.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the second invention, and FIG. 2 is a sectional view of a fumigation box attachment/detachment chamber used in the third invention. DESCRIPTION OF SYMBOLS 1...Dolly, 2...Horizontal, 3...Smoking box, 6...Inner space, 9, 10...Damper, 11...Smoking box attachment/detachment chamber, 14...Damper.

Claims (1)

[Claims] 1. After the fumigation box 3 having a double wall is placed over the trolley 1 loaded with the 2 items and the fumigation process is performed, the interior surrounded by the double walls of the fumigation box 3 is A fumigation processing method characterized by introducing outside air into the space 6 and rapidly cooling it. 2 The ceiling and side walls of the fumigation box 3 for producing ibushi wafer are double-walled, and the ceiling and side walls are equipped with dampers 9 that can open and close communication between the double-walled internal space 6 and outside air. A fumigation box characterized by having 10 points. 3. A damper 14 capable of opening and closing communication with outside air is provided in the fumigation box attachment/detachment chamber 11,
After the fumigation and cooling process has been completed, the cart 1 is placed inside the fumigation box attachment/detachment chamber 11, and the fumigation box 3 is removed from the dolly 1. After that, outside air is introduced into the fumigation box attachment/detachment chamber 11 for rapid cooling. The fumigation processing method is characterized in that the trolley 1 is pulled out from the fumigation box attachment/detachment chamber 11.