JPS6139030B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to a seaweed drying apparatus, in which a heat radiation pipe connected to a heat generating section is disposed between the upper and lower stages of the endless conveyance path of a screen, and the heat radiation pipe is connected to a heat generating section. In order to dry the seaweed spread on the screen by heat dissipation from the tubes, and to lower the temperature in the lower part of the drying chamber, an outside air introduction part is formed in the lower part of the drying chamber.

(Background of the Invention) FIG. 3 shows a seaweed drying apparatus that has been widely implemented in the past, in which a heat exchange chamber 32 is arranged on the side of a drying chamber 31, and outside air is introduced by a fan 33. The heated air is then heated by heat dissipation from the heat exchange duct 34, and the warmed air is sent to the lower part of the drying chamber 31, blown upward, and spread on the cage 35 that is conveyed on the endless conveyance path 37 inside the drying chamber 31. It was designed to dry 36 sheets of seaweed. 38 is a burner connected to the heat exchange duct 34. However, in such a seaweed drying apparatus, higher temperature air hits the seaweed 36 in the late drying stage with low moisture content on the lower stage B side, and lower temperature air hits the seaweed 36 in the early drying stage with high moisture content on the upper stage A side. Since the seaweed 36 on the lower tier B side, which has a low moisture content, is hit by high-temperature air, the seaweed 36 tends to crack due to excessive drying. Furthermore, after the outside air is heated in the heat exchanger 32, the warmed air is introduced into the drying chamber 31, which results in a large amount of heat loss. There were various problems such as the large size of the machine.

(Summary of the Invention) The present invention has been made in consideration of the above points, and the first object of the present invention is to accelerate the drying of seaweed with high moisture content by applying high-temperature air to the seaweed in the early stage of drying. To provide a seaweed drying device capable of producing high-quality dried seaweed without cracks by applying relatively low-temperature air to the seaweed with a low moisture content in the late stage of drying. A second object of the present invention is to provide a seaweed drying device that makes it possible to eliminate the need for a heat exchange chamber. For this purpose, the present invention provides a seaweed drying apparatus that dries the seaweed spread on the cage while transporting the cage along the endless transportation path provided in the drying chamber. A heat dissipation pipe is disposed between the upper stage and the lower stage, and the heat dissipation pipe is connected to a heat generating section, and an outside air introduction pipe is formed in the lower part of the drying chamber. By configuring the seaweed drying equipment in this way, high-temperature air is applied to the seaweed in the early drying period, which has a high moisture content, to accelerate its drying, while relatively low-temperature air is applied to the seaweed in the late drying period to prevent cracking. This makes it possible to produce high-quality dried seaweed without any heat loss, eliminates the need for a heat exchange chamber, and furthermore enables highly efficient drying of seaweed with little heat loss.

(Example) Hereinafter, an example of the present invention will be described with reference to each figure.

FIG. 1 is a front view of a seaweed drying apparatus according to the present invention, in which 1 is a drying chamber, and a seaweed 3
The bamboo basket 2 on which is spread out is being transported. 4 is a holder for the screen 2, which is loaded on the endless chain 5. The endless chain 5 circulates in the drying chamber 1, and the screen 2 attached to the holder 4 is sent to the upper stage A side of the endless chain 5, transported from the upper stage A side to the lower stage B side, and spread on the screen 2. When the drying of the seaweed 3 is completed, it is carried out of the drying room 1. A side chamber 6 is provided on one side of the drying chamber 1 and communicates with the drying chamber 1 through an opening 18 provided at the bottom of the drying chamber 1 . 1a is a ceiling member of the drying chamber 1.

Reference numeral 9 denotes a heat exchanger disposed on the upper side of the drying chamber 1, and its surfaces 9a, 9b, 9c, and 9d are connected to the drying chamber 1, the side chamber 6, and the discharge port 10, respectively.
It communicates with the outside air intake port 11. Reference numeral 12 denotes an exhaust fan, and by the exhaust action of the fan 12, the air that has removed the moisture from the seaweed 3 is discharged to the outside of the drying chamber 1. 13 is a damper for adjusting air volume. Reference numeral 14 denotes a heat dissipation pipe horizontally disposed between the screen 2 of the upper stage A and the screen 2 of the lower stage B, and its details will be explained next with reference to FIG. 2.

The heat dissipation tube 14 is connected to the screen 2 held in the holder 4.
There are three, corresponding to the number of drying chambers 1, and they are arranged horizontally at equal intervals in the length direction of the drying chamber 1. Reference numeral 15 denotes an air pipe, and each of the heat radiators 14 is connected to this air pipe 15. This air pipe 15 is connected to a burner 8 as a heat generating section, and the hot air generated by the burner 8 is sent to each heat radiation pipe 14 through the air pipe 15. Reference numeral 16 denotes an exhaust pipe to which the other end of each of the heat dissipation pipes 14 is connected, and its tip extends outside the drying chamber 1 and is connected to the chimney pipe 7. Reference numeral 17 denotes a damper disposed on the upper part of the side wall 6. When the damper 17 is opened as shown by the solid line in FIG. It is returned and enters the drying chamber 1 again through the opening 18.

Reference numeral 20 denotes an outside air introduction part consisting of an opening opened below the lower stage B of the side wall of the drying chamber 1, and 21 is a damper for opening and closing the outside air introduction part. Fresh outside air with low temperature and low humidity is introduced from section 20. Note that the damper 21 does not necessarily need to be provided, and outside air may be constantly introduced.

This device consists of the above-mentioned configuration, and has 8 burners.
The heated air is sent to the heat radiation pipe 14 through the air pipe 15. Inside the drying chamber 1, a cage 2 is transported from an upper stage A to a lower stage B, and a heat dissipation pipe 1
The high temperature air warmed by the heat dissipation in step 4 is transferred to the upper stage A.
After hitting the seaweed 3 with a high moisture content in the early stage of drying and drying it significantly, it is transferred to the heat exchanger 9 as shown by the arrow B due to the exhaust action of the fan 12.
It is discharged from the drying chamber 1 through the discharge port 10. In addition, the outside air passes through the heat exchanger 9 as shown by arrow A, enters the rear side chamber 6 where the temperature is slightly increased by removing residual heat from the exhaust gas, and then enters the drying chamber 1 through the opening 18.
The air enters the lower part of the air and blows upward, hitting the seaweed 3 on the lower stage B side with a low moisture content in the late drying stage and drying it. When the air that hits the seaweed 3 on the lower stage B side is further blown up from the lower stage B to the upper stage A, it is heated to a high temperature by heat radiation from the heat radiation pipe 14, and as described above, it hits the seaweed 3 on the upper stage A side. Dry this considerably. Also, if damper 17 is left open,
A portion of the warm air headed for the heat exchanger 9 enters the side chamber 6 and further enters the drying chamber 1 through the opening 18. This warm air has considerable residual heat and also absorbs moisture from the seaweed 3 and has a moderate amount of moisture, so this humid warm air is returned to the drying chamber 1 and is transferred to the seaweed 3 on the lower tier B side in the late drying stage. If you apply it to the seaweed 3, it will add appropriate moisture to the seaweed 3 and prevent it from cracking.
The drying can be carried out.

By the way, although this device has a structure in which the temperature on the lower tier B side is less likely to rise than on the upper tier A side, the temperature on the lower tier B side becomes considerably high due to heat transfer from the upper tier A side to the lower tier B side, and drying ends. There is a risk that the immediately preceding seaweed 3 will be excessively dried and cracks will occur. In such a case, cold outside air may be introduced into the lower part of the drying chamber 1 from the outside air introduction part 20 to lower the temperature on the lower stage B side. In this way, according to the present device, high-temperature warm air can be blown from a short distance to the seaweed 3 on the upper stage A side, which has a high moisture content in the early stage of drying, so that its drying can be significantly accelerated. Furthermore, since relatively low-temperature warm air hits the seaweed 3 with a low moisture content in the late drying stage on the lower stage B side, high-quality dried seaweed can be produced without cracking due to excessive drying. Furthermore, if the temperature on the lower tier B side becomes unnecessarily high and there is a risk that the seaweed 3 may be overdried, cold outside air can be introduced from the outside air introduction section 20 to lower the temperature on the lower tier B side. Therefore, generation of cracks due to excessive drying can be more reliably prevented.

The present invention is not limited to the embodiments described above, and various design changes are possible. For example, the heat dissipation tubes may be arranged in a curved shape such as a meandering shape. Furthermore, the present invention can also be applied to a type of seaweed drying apparatus in which the screen 2 is not attached to the holder 4 and is transported on a transport path within the drying chamber 1.

(Effects of the Invention) As explained above, the seaweed drying apparatus according to the present invention can significantly accelerate the drying of seaweed 3 that has a high moisture content in the early drying period, and has extremely high thermal efficiency. By applying relatively low-temperature air to seaweed with a low moisture content in the late drying stage, it is possible to produce high-quality dry seaweed without cracks. In addition, especially by forming the outside air introduction part 20, the lower stage B
It is possible to maintain the side temperature more appropriately and prevent over-drying of the seaweed 3, and furthermore, the heat exchange chamber attached to the conventional seaweed drying device is not necessarily necessary and can be made unnecessary. There are various effects such as:

[Brief explanation of the drawing]

The figure shows an embodiment of the present invention.
The figure is a front view of the seaweed drying device, FIG. 2 is a plan view, and FIG. 3 is a front view of a conventional one. 1...Drying room, 2...Storage, 3...Seaweed, 5...
Endless conveyance path, 8... heat generating section, 14... heat dissipation tube,
20...Outside air introduction section, A...Upper stage, B...Lower stage.

Claims (1)

[Claims] 1. In a seaweed drying device that dries the seaweed spread on the cage while transporting the cage along an endless transport path provided in the drying room, there is a space between the upper and lower stages of the endless transport path. A seaweed drying apparatus characterized in that a heat dissipation pipe is provided and the heat dissipation pipe is connected to a heat generating section, and an outside air introduction section is formed in the lower part of the drying chamber.