JP2001263951A - Method and device for recycling heat energy of operating medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the method and device for recycling the heat energy of an operating medium capable of achieving the saving of natural resources as well as energy, by a method wherein the re-utilizing of remaining energy of the operating medium such as air containing much moisture after drying a highly humid matter to be dried or the like is contrived. SOLUTION: In the method and device for recycling the heat energy of the operating medium 14 containing much moisture after drying the highly humid matter 12 to be dried, the moisture contained in a part or all of the operating medium 14 is removed through a cooling medium having a temperature lower than a room temperature and, thereafter, the operating medium 15 whose moisture is removed is reused for the drying of the matter 12 to be dried.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for recycling thermal energy of an operating medium, which dehumidifies and recirculates an operating medium such as air containing a large amount of moisture after drying to reuse the remaining thermal energy of the operating medium. Related to the device.

[0002]

2. Description of the Related Art Conventionally, in a method for drying raw nori, which is an example of an organic substance having a high water content, air at room temperature is heated by heat exchange to produce hot air, and this hot air is placed in a drying chamber. The raw laver is dried by contacting the laver and absorbing the water from the raw laver. At this time, a part of the working air containing much water after drying the raw laver is returned to the drying room, but most of it is discharged outside,
Hot air heated by heat exchange is newly supplied to raw laver while supplying a large amount of room temperature air.

[0003]

However, the conventional method of drying a highly water-containing material to be dried such as raw seaweed has the following problems to be solved. That is, a large amount of thermal energy still remains in the working air containing a large amount of moisture after drying the material to be dried having a high moisture content, and most of the working air is discharged to the outside, and a large amount of room temperature air is discharged. Supplying and heating by heat exchange to generate warm air has been a problem from the viewpoint of resource saving and energy saving.

The present invention has been made in view of such circumstances, and aims to reuse the remaining energy of a working medium such as air containing a large amount of moisture after drying an object to be dried having a high water content. Accordingly, an object of the present invention is to provide a method and an apparatus for recycling thermal energy of an operating medium, which can achieve resource saving and energy saving.

[0005]

According to the present invention, there is provided a method for recycling thermal energy of an operating medium according to the present invention, which recycles residual thermal energy of an operating medium containing moisture after drying a material having high water content. A method for recycling thermal energy of an operating medium to be used, wherein water contained in a part or all of the operating medium is removed through a cooling medium lower than room temperature,
The operating medium from which the moisture has been removed is reused for drying the object to be dried. Thus, the object to be dried can be dried using the residual thermal energy of the working medium from which the moisture has been removed. In the thermal energy recycling method of the working medium according to the present invention, the working medium may be air, and the cooling medium may be water or air. Thereby, inexpensive operation and a cooling medium can be used.

In accordance with the object of the present invention, there is provided an apparatus for recycling thermal energy of an operating medium according to the present invention, wherein a heated operating medium supplied from a medium supply port of a drying chamber is brought into contact with a highly-hydrous material to be dried. A heat energy recycling apparatus for an operating medium that reuses residual thermal energy of an operating medium containing moisture after drying, wherein a medium supply port communicating with a medium outlet of a drying chamber and an operating medium can pass therethrough. A hermetic condenser in which a medium flow path and a medium exhaust port are formed, and a cooling jacket in which a cooling medium flows is provided in the medium flow path; a medium exhaust port of the condenser and a medium in a drying chamber; The supply port is connected by a communication channel. As a result, the water in the working medium containing water is removed by the condenser, and the object to be dried can be dried using the residual thermal energy of the working medium from which the water has been removed. In the thermal energy recycling apparatus for the working medium according to the present invention, a switching damper for switching the working medium to the condenser side or the outdoor side may be provided between the medium discharge port of the drying chamber and the medium supply port of the condenser. . Thereby, the circulation amount of the working medium can be adjusted according to the drying conditions and the like. In the thermal energy recycling apparatus for an operating medium according to the present invention, the cooling jacket is formed in a plate shape, and the front surface and / or the back surface of the cooling jacket can constitute a part of the medium flow path. by this,
The condensation surface (condensation surface) of the cooling jacket can be made as wide as possible.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention. Here, FIG. 1 is a front view of a thermal energy recycling apparatus for an operating medium according to an embodiment of the present invention, FIG. 2 is a side view of the thermal energy recycling apparatus for the operating medium, and FIG. FIG. 4 is a front view of a first cooling jacket provided in a condenser of the recycling apparatus, FIG. 4 is a side view of a first cooling jacket provided in a condenser of the thermal energy recycling apparatus of the working medium, and FIG. FIG. 6 is a front view of a second cooling jacket provided in a condenser of the thermal energy recycling apparatus, FIG. 6 is a side view of a second cooling jacket provided in a condenser of the thermal energy recycling apparatus of the same working medium, and FIG. It is a perspective view of a drying room to which a thermal energy recycling device for a medium is applied.

As shown in FIG. 1, a thermal energy recycling apparatus 10 for an operating medium according to an embodiment of the present invention comprises:
In the drying chamber 11, the raw seaweed 12 which is an example of a highly hydrated material to be dried is brought into contact with air 13 which is an example of a heated working medium and dried to remove the water of the air 14 containing water. This is an apparatus for reusing the air 15 from which water has been removed and which has residual thermal energy for drying the raw seaweed 12 again. Hereinafter, these will be described in detail.

As shown in FIGS. 1 and 7, the entire surface of the medium supply port (opening at the upper end) of the drying chamber 11 has residual heat energy from which water has been removed but has a low temperature (15 to 15).
The air 15 is heated to a high temperature (about 40 to 5).
A heating means 16 for converting the air 13 into air 13 is provided. At the opening on one side of the lower end of the drying chamber 11, the temperature of the heated air 13 is reduced by contact with the raw nori 12 and the air 14 that has absorbed the moisture of the raw nori 12 is sent to the thermal energy recycling device 10. The blowers 17 to 20 are flange-connected via connection hoods 21 to 24, respectively.

As shown in FIGS. 1 and 2, a box-shaped switching damper 26 is provided downstream of a discharge port 25 of a blower 17 (same for 18 to 20) which is an example of a medium discharge port of the drying chamber 11.
The switching damper 26 switches the air 14 having absorbed moisture to the condenser 28 side via the connection duct 27 having a rectangular cross section or the outdoor 30 side via the exhaust duct 29 having a rectangular cross section. it can. As shown in FIG. 1, the exhaust duct 29 is formed by a flanged connection at the upper end opening of the switching damper 26, a “C” -shaped portion when viewed from the side, and a straight line when viewed from the side where the tip protrudes outside 30. Are connected by a flange. The switching damper 26 has a structure capable of adjusting the opening.

As shown in FIG. 1, a downstream end of a connection duct 27 is connected to a medium supply port 31 of a box-shaped condenser 28, and a communicating flow port is connected to a medium exhaust port 32 of the condenser 28. An upstream end of a communication duct 33 indicated by a two-dot chain line as an example of a road is connected. The downstream end of the communication duct 33 is connected to the medium supply port of the drying chamber 11, and has a special structure in which a part of the linear portion of the exhaust duct 29 is incorporated on the upstream side in the communication duct 33. I have.

As shown in FIG. 1, the lower end of the condenser 28 is provided with four support legs 34. The condenser 28 has a medium supply port 31 connected to the downstream end of the connection duct 27 and into which the air 14 having absorbed moisture flows in a horizontal direction, and a medium flow path through which the air 14 can pass in a U-shape when viewed from the side. 35 and a medium exhaust port 32 through which the air 15 from which the moisture of the air 14 has been removed flows upward. As shown in the figure, the medium flow path 35 mainly includes two plate-like first and second cooling jackets 36 set in the condenser 28.
37.

As shown in FIG. 3 and FIG. 4, the first cooling jacket 36 is configured such that the edges of the front and back plates 38 and 39 each having a substantially base shape are connected to the upper plate 40, the upper plates 41 and 42, The cooling jacket body 48 connected by the plates 43 and 44, the lower plates 45 and 46, and the lower plate 47 to form a closed structure.
And a lower edge portion of the front plate 38 of the cooling jacket body 48 and a trough 49, 50 for condensed water having a cross-sectional groove shape which is slightly protruded from the lower edge portion and which has a cross-sectional shape in a side view. ing. A pipe-shaped water supply port 51 for supplying water as an example of a cooling medium into the cooling jacket body 48 is provided at the center of the upper plate 40, and a pipe-shaped water supply port for discharging water is provided at a lower end of the front plate 38. A drain 52 is attached. Front, back plate 3
A band-shaped reinforcing plate 53 is fixed at the center between the positions 8 and 39 to prevent the front and back plates 38 and 39 from being depressed.

Further, L is provided at the center of the lower plates 45 and 46.
The attachment brackets 54 and 55 having a letter shape are attached to face each other. The lower surfaces of the mounting brackets 54, 55 and the extended horizontal lines 56, 57 extending from the lower surface, and the upper plate 4
Moisture is applied to trapezoidal cutouts 60 and 61 formed by four sides formed by extending vertical lines 58 and 59 extending downwards 1 and 42, oblique plates 43 and 44, and upper portions of lower plates 45 and 46. It is configured so that the absorbed air 14 passes. Therefore,
The water supplied from the water supply port 51 is supplied to the cooling jacket body 48.
Flows from the top to the bottom, and the front, back plates 38, 39, diagonal plates 43, 44, and lower plate 4 above the extended horizontal lines 56, 57.
5 and 46 are dew-condensing surfaces, and the air 14 absorbing moisture is used.
Can remove moisture from the water. The condensed water is discharged downward through the dew-water troughs 49 and 50.

As shown in FIGS. 5 and 6, the second cooling jacket 37 has substantially the same structure as that of the first cooling jacket 36. A cooling jacket body 72 having edges closed by an upper plate 64, upper plates 65 and 66, horizontal plates 67 and 68 forming an installation surface, lower plates 69 and 70, and a lower plate 71 to form a closed structure; Front plate 6 of jacket body 72
Guide plate 7 for water condensed integrally attached to the lower end of 2
3 is provided. A pipe-shaped water supply port 74 for supplying water into the cooling jacket body 72 is provided at one end of the upper plate 64.
However, a pipe-shaped drain port 75 for discharging water is attached to the other end of the lower end of the back plate 63.

A band-shaped reinforcing plate 76 is fixed at the center between the front and back plates 62 and 63 to prevent the front and back plates 62 and 63 from being depressed. The extension horizontal line 77 connecting the horizontal plates 67 and 68 is at the same level as the extension horizontal lines 56 and 57 of the first cooling jacket 36. Therefore, the water supplied from the water supply port 74 flows from the top to the bottom in the cooling jacket main body 72, and removes moisture from the air 14 absorbing the moisture by using the top plate 62 above the extended horizontal line 77 as a dew surface. Can be. The condensed water is discharged downward through the guide plate 73.

Stainless steel is used as a material of the condenser 28 including the first and second cooling jackets 36 and 37, and each plate used for the cooling jacket bodies 48 and 72 is 1.2 mm. It has a thickness. 1st, 2nd
To be supplied to the water supply ports 51 and 74 of the cooling jackets 36 and 37 (the water temperature is about 4 to 10 ° C. lower than the indoor temperature)
Is the drain port 5 of the first and second cooling jackets 36 and 37.
Warm water discharged from 2, 75 (water temperature is 10 ~
(About 15 ° C.) is circulated and cooled by a pump and a cooling tower (not shown). FIG.
Reference numeral 78 denotes a side wall of a building in which an insertion hole 79 through which the tip of the exhaust duct 29 is inserted is formed, and reference numeral 80 denotes a fan 17.
20 to 20 are shown.

Next, a method for drying raw laver to which the thermal energy recycling method for working medium according to one embodiment of the present invention is applied will be described with reference to FIG. (1) The switching damper 26 is set on the condenser 28 side. (2) The heating means 16 and the blowers 17 to 20 of the drying chamber 11
The first and second cooling jackets 3 are driven by driving the pump and the cooling tower while circulating air by driving the
Water (about 4 to 10 ° C.) is circulated through 6, 37. (3) Drying room 1 by transport means such as a chain conveyor
The raw seaweed 12 is continuously conveyed into 1. At this time, the high-temperature (about 40 to 50 ° C.) air 13 heated by the heating means 16 comes into contact with the raw nori 12 and absorbs the moisture of the raw nori 12 to lower the temperature (20 to 30). ℃)
It becomes air 14.

(4) The air 14 passes through the switching damper 26 and the connection duct 27 to the medium flow path 35 in the condenser 28.
Pass through. At this time, the temperature is lower than room temperature (about 15 ° C.) (4
Moisture is removed from the air 14 containing water by contact of the air 14 with the first and second cooling jackets 36 and 37 cooled through water of about -10 ° C). (5) In the condenser 28, the moisture 15 is removed, and the air 15 (about 15 to 25 ° C.) having the residual heat energy passes through the communication duct 33 and is circulated to the heating unit 16 of the drying chamber 11, and the heating unit 16 is again heated. And is supplied to the raw laver 12. (6) Thereafter, while repeating the above (3) to (5),
A predetermined amount of the raw seaweed 12 that is continuously conveyed can be dried. If the air containing water 14
Is circulated and a part is released to the outside air, the switching damper 26 is set at an intermediate position between the condenser 28 side and the outdoor 30 side.

In the thermal energy recycling apparatus 10 for an operating medium according to an embodiment of the present invention, a low speed (0.
(About 5 to 1.0 m / s) and promotes the condensation of the air 14 containing water having a low temperature difference with a small temperature difference from the room temperature. It is considered to increase the temperature difference. First,
Regarding the expansion of the condensing surface, in the condenser 28, the first and second cooling jackets 36 and 37 in which the cooling water has flowed inside.
Is provided in the medium flow path 35 and the first cooling jacket 3
6 mainly includes a front plate 38 (front surface) and a back plate 39 (back surface), and the second cooling jacket 37 mainly includes a front plate 62.
(Surface) constitutes a part of the medium flow path 35 and the air 14
Can contact with Moreover, since the material of the first and second cooling jackets 36 and 37 is made of stainless steel, the liquid film becomes a good condensing surface. Next, regarding the expansion of the temperature difference, when the temperature of the air 14 (about 20 to 30 ° C.) is lower than the room temperature (about 15 ° C.),
In order to solve this point, as a method for reducing the temperature of the condensation surface to room temperature or lower, water cooled to a temperature lower than room temperature by a cooling tower or the like is used.

In the above-described embodiment, the thermal energy recycling device 10 for the working medium is used for drying the raw seaweed 12, but the present invention is not limited to this. Applicable. Further, the present invention can be applied not only to a dryer but also to an energy device such as an air conditioner. Furthermore, although air was used as the operating medium and water was used as the cooling medium, the present invention is not limited to this, and other media can be used. For example, a gas such as nitrogen can be used as the operating medium, and a gas such as cold air can be used as the cooling medium. The communication flow path between the condenser 28 and the drying chamber 11 is constituted by the communication duct 33, but the condenser 28 and the drying chamber 11 are arranged in a closed building, and the air 15 discharged from the condenser 28 is In the case of a structure that stays in the building, even if the communication duct 33 is omitted,
The air 15 exhausted from the condenser 28 can be taken into the drying chamber 11. In this case, it is assumed that a communication passage between the condenser 28 and the drying chamber 11 is formed in a closed building.

The air 13 and 14 in the drying chamber 11 are blown by the blower 1
Although suction was performed by 7 to 20, the present invention is not limited to this, and a structure in which the air 13 and 14 are pushed into the drying chamber 11 may be adopted. The switching damper 26 is provided to discharge a part of the air 14 to the outside 30 through the exhaust duct 29. However, if necessary, the switching damper 26 is omitted and all the air 14 is reused. For this purpose, it can be sent to the condenser 28. Although the connection duct 27 is provided between the switching damper 26 and the condenser 28, the connection duct 27 can be omitted depending on the situation.

The switching dampers 26, the connection ducts 27, the exhaust ducts 29, the condensers 28 and the communication ducts 33 are provided in the same four sets as the number of the fans 17 to 20, but are not limited thereto. In consideration of the drying conditions and the condensation conditions, the number of blowers may be one to three or five or more, and the number of blowers may be the same in accordance with this number.
Although the first and second cooling jackets 36 and 37 of the condenser 28 are plate-shaped, the present invention is not limited to this as long as the structure allows a large surface for condensation with the air 14. Although two cooling jackets were used, one or three or more cooling jackets may be used as necessary. Although the shape of the condenser 28 is box-shaped, other shapes may be used.

[0024]

According to the first and second aspects of the present invention, there is provided a method for recycling thermal energy of an operating medium, and the third and third to fifth aspects.
In the thermal energy recycling apparatus for an operating medium described above, the object to be dried can be dried using the residual thermal energy of the operating medium from which water has been removed, so that resources and thermal energy can be reduced. In particular, in the thermal energy recycling method for the working medium according to the second aspect, an inexpensive operation and cooling medium can be used, so that the running cost can be reduced. In the thermal energy recycling apparatus for an operating medium according to the fourth aspect, the circulating amount of the operating medium can be adjusted according to the drying conditions and the like, so that the apparatus has versatility. In the thermal energy recycling device for the working medium according to the fifth aspect, the condensation surface of the cooling jacket can be made as wide as possible, so that the dehumidifying efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a front view of a thermal energy recycling device for an operating medium according to an embodiment of the present invention.

FIG. 2 is a side view of the thermal energy recycling device for the working medium.

FIG. 3 is a front view of a first cooling jacket provided in a condenser of the thermal energy recycling device for the working medium.

FIG. 4 is a side view of a first cooling jacket provided in a condenser of the thermal energy recycling device for the working medium.

FIG. 5 is a front view of a second cooling jacket provided in a condenser of the thermal energy recycling device for the working medium.

FIG. 6 is a side view of a second cooling jacket provided in a condenser of the thermal energy recycling apparatus for the working medium.

FIG. 7 is a perspective view of a drying chamber to which the thermal energy recycling device for the working medium is applied.

[Explanation of symbols]

10: Thermal energy recycling device for working medium, 11:
Drying room, 12: raw seaweed (highly hydrous dried material), 13,
14, 15: air (operating medium), 16: heating means, 17
-20: blower, 21-24: connection hood, 25: discharge port (medium discharge port), 26: switching damper, 27: connection duct, 28: condenser, 29: exhaust duct, 30: outdoor,
31: medium supply port, 32: medium exhaust port, 33: communication duct, 34: support leg, 35: medium flow path, 36: first cooling jacket, 37: second cooling jacket, 38: front plate, 39: back plate, 40: upper plate, 41, 42: upper plate, 4
3, 44: diagonal plate, 45, 46: lower plate, 47: lower plate,
48: cooling jacket body, 49, 50: dew condensation gutter,
51: water inlet, 52: drain, 53: reinforcing plate, 54, 5
5: mounting bracket, 56, 57: extended horizontal line, 5
8, 59: extended vertical line, 60, 61: notch, 62: front plate, 63: back plate, 64: upper plate, 65, 66: upper plate, 6
7, 68: horizontal plate, 69, 70: lower plate, 71: lower plate,
72: cooling jacket body, 73: guide plate, 74: water supply port, 75: drain port, 76: reinforcement plate, 77: extended horizontal line, 78: side wall, 79: insertion hole, 80: cover

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yoshio Sasaki 2-3-3, Kumano-cho, Shimonoseki City, Yamaguchi Prefecture (72) Inventor Masanobu Kagawa 54, Higashikinami, Ube City, Yamaguchi Prefecture 4-17 F-term (reference) 3-17 Chuo-cho, Nanyo-shi 3L113 AA01 AB03 AC25 AC45 AC46 AC56 AC57 AC67 BA27 CA08 CB17 CB27 CB28 DA03 4B019 LT51 LT56

Claims (5)

[Claims] 1. A method for recycling heat energy of an operating medium that reuses residual heat energy of an operating medium containing moisture after drying a material having a high water content, wherein a part or all of the operating medium is reused. Removing the moisture contained in the working medium through a cooling medium at a temperature lower than room temperature, and then reusing the working medium from which the moisture has been removed for drying the object to be dried. Method. 2. The method according to claim 1, wherein said working medium is air and said cooling medium is water or air. 3. A heated working medium supplied from a medium supply port of a drying chamber is brought into contact with a highly-hydrous material to be dried, and dried, and the residual heat of the working medium containing moisture after the drying. A thermal energy recycling apparatus for operating medium that reuses energy, wherein a medium supply port communicating with a medium discharge port of the drying chamber, a medium flow path through which the operation medium can pass, and a medium exhaust port are formed, and A cooling jacket in which a cooling medium in which a cooling medium flows is provided in the medium flow path, and a medium exhaust port of the condenser and a medium supply port of the drying chamber are connected by a communication flow path. A thermal energy recycling device for an operating medium, comprising: 4. The thermal energy recycling apparatus for an operating medium according to claim 3, wherein the operating medium is provided between the medium outlet of the drying chamber and the medium inlet of the condenser. A thermal energy recycling device for an operating medium, comprising a switching damper for switching outside. 5. The thermal energy recycling apparatus according to claim 3, wherein the cooling jacket is formed in a plate shape, and a surface and / or a back surface of the cooling jacket constitutes a part of the medium flow path. A thermal energy recycling device for an operating medium, characterized in that: