JPH06101965A - Drying device - Google Patents

Abstract

PURPOSE:To facilitate a migration of moisture from a material to be dried to its surface and improve the drying efficiency by a method wherein a radiating member for radiating an electro-magnetic wave is arranged in a passage for blowing air toward the material to be dried, water molecules in blown air are activated with the radiated electro-magnetic wave and then the wave is blown against the material to be dried. CONSTITUTION:Drying air is blown into a lower space 4 of a drying container 3 storing a material to be dried 5 such as crops, marine products and plastics and the like through an air passage 2 under an operation of a blower 1, moisture content within the material to be dried 5 are accompanied with the air passing through the material to be dried 5 and then the air is discharged into the surrounding atmosphere to dry the material to be dried 5. In this case, a radiating member A for radiating much amount of electro-magnetic wave with a waver absorption wavelength (5 to 7mum) such as a far infrared ray ceramics is arranged the air passage 2. moisture content in the blown air is activated by the electro-magnetic wave radiated from the radiating member A and blown toward the material to be dried, thereby the water molecule in the material to be dried is divided into some fine elements so as to facilitate the migration of the moisture from within the material to be dried toward its surface and then a drying efficiency is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drying method and apparatus, and more particularly, to a drying method and apparatus capable of highly efficiently drying an object to be dried such as powdery or granular materials, agricultural products and marine products while maintaining high quality. Regarding

[0002]

2. Description of the Related Art Generally, widely used ventilation drying (hot air drying, dehumidifying drying, etc.) is performed by blowing air to an object to be dried with a blower, and especially the wavelength of electromagnetic waves such as infrared rays is controlled specially. Not at all. According to the research conducted by the present inventors, many electromagnetic waves in the so-called near-infrared (0.76 to 2 μm) region are often irradiated in such normal ventilation drying, and electromagnetic waves in this wavelength range are reflected light rays. Therefore, only the surface of the material to be dried is heated,
It is transmitted as heat conduction to the inside of the material to be dried. Therefore, when the area near the surface dries and shrinks first, the water outlet from the inside becomes so-called blocked, making it very difficult for moisture to come out, resulting in a phenomenon that reduces the drying efficiency. I found out that

In recent years, a ceramic heater, which is a far-infrared radiator, is often used in hot air drying.
As a conventional method of using a far-infrared radiator, a method of uniformly heating and drying an object to be dried with radiant heat of far-infrared rays is generally used, and a heater is generally used in a high temperature range. However, since the ratio of the near infrared rays emitted increases as the temperature of the ceramic body that is normally used increases, the phenomenon as described above also occurs, and conversely the drying efficiency may decrease. In addition, energy for heating to high temperature is required.

[0004]

As described above, the ventilation drying methods of today include the factors that reduce the drying efficiency in any case, and the energy consumption efficiency is not sufficient. The inventors of the present invention have conducted a great deal of research for the purpose of obtaining a drying method and apparatus in which the factors that lower the drying efficiency of the conventional drying method are eliminated and the energy consumption efficiency is improved. went. As a result, the recently reported relationship between water molecule aggregates and electromagnetic waves of a specific wavelength, that is, when an electromagnetic wave of a specific wavelength is emitted to a water molecule aggregate, for example, when an electromagnetic wave of about 6 microns is emitted to a water molecule, Resonates with the natural frequency of, and the electromagnetic waves are absorbed inside to activate the water molecule assembly, and as a result, large water molecules connected by hydrogen bonds are broken into hydrogen clusters and become multiple clusters. Perceiving that very efficient drying can be obtained by using the fact that is realized (which is confirmed by X-ray diffraction or NMR (nuclear magnetic resonance spectroscopy) image analysis) for the drying method, The present invention has been completed.

[0005]

[Means for Solving the Problems] Original drying means how to efficiently and efficiently move the moisture in the material to be dried to the surface and evaporate it from the surface. For that purpose, simply increase the blast temperature. The drying efficiency cannot be improved only by lowering the relative humidity and increasing the drying driving force.
Therefore, when activating the water molecules by radiating an electromagnetic wave of a wavelength absorbed by water molecules in the blown air, and then blowing air to the dried material, it is strongly absorbed into the dried material due to the activation, and then It can be seen that water molecules in the material to be dried can be subdivided to facilitate removal of water in the material to be dried and improve the drying efficiency.

According to the above report, when an electromagnetic wave of about 6 microns is emitted to a water molecule, it resonates with the natural frequency of the water molecule, and energy is absorbed inside and activated. As a result, large water molecules connected by hydrogen bonds are broken up into 6 clusters by breaking the hydrogen bonds. As a result, the water molecules in the material to be dried are in a state of being easily moved, and easily move to the surface to be evaporated.

By the way, since far infrared rays (wavelength of 3 to 100 microns) include a water absorption wavelength band, it is necessary to select a radiator having a large radiant energy of a wavelength absorbed by water molecules among the far infrared radiators. By doing so, moisture can be easily transferred from the inside of the material to be dried to the surface, and the drying efficiency can be improved. However, the wavelength of the far-infrared radiator usually moves to the near-infrared region as the temperature rises, and as described above, the conventional far-infrared ceramic heater is used in the high temperature region, the ceramics are Despite including the absorption wavelength band of water, it has not always been used as a means for subdividing water molecules to facilitate water removal.

In view of the above facts, in order to achieve the above object, the present invention provides a radiator for emitting a large number of electromagnetic waves having an absorption wavelength of water in a path for blowing air to an object to be dried, so The water molecules in the product absorb the electromagnetic wave of that wavelength to activate it and blow it to the material to be dried, so that the water molecules in the material to be dried are subdivided so that water can easily migrate from the material to be dried to the surface. Disclosed is a drying method.

In order to facilitate the generation of electromagnetic waves having a wavelength absorbed by water molecules, the radiator may blow dehumidified air at room temperature or measure the temperature of the radiator, and the radiator may absorb water. It is a particularly preferred embodiment of the present invention to control the blowing temperature so as to maintain the temperature at which more electromagnetic waves having a wavelength are radiated. In the present invention, the radiator may be located also in the drying container for the material to be dried, whereby the moisture transfer between the objects to be dried stored in the drying container is facilitated and the material is dried to a uniform water content. It becomes possible.

The wavelength of the electromagnetic wave emitted by the radiator is preferably 5 to 7 μm, and zirconia, alumina, silica or the like is synthesized as the radiator that emits the electromagnetic wave of such a wavelength. There are ceramics that do. The present invention further has a drying device characterized by having a drying container for the material to be dried and a blower, and a radiator for radiating many electromagnetic waves having an absorption wavelength of water is provided in a path for blowing air to the drying container. Also disclosed. The radiator is further provided with a temperature measuring means and a control means for controlling a blowing temperature based on the information of the temperature control means, or the radiator which radiates a lot of electromagnetic waves having an absorption wavelength of water is located in the drying container. This is a further preferable aspect.

[0011]

In the present invention, by selecting a radiator having a large radiant energy of a wavelength absorbed by water molecules among far infrared radiators, or by radiating a wavelength of water absorbed by a normal far infrared radiator. By using in the temperature range where the energy is most radiated, that is, in the normal temperature range, it is possible to facilitate the movement of water from the inside of the material to be dried to the surface during the storage in the drying step and improve the drying efficiency.

Further, drying at room temperature leads to high quality drying. Taking grains as an example, in recent years, by adopting a dehumidifying and drying method, a method of dehumidifying while keeping the temperature of the blast air at room temperature and reducing the absolute humidity to dry has become popular. The problem is that the water transfer from inside the dried product is slow and the drying time is long.

According to the present invention, a radiator that emits many wavelengths around 6 μm, which is the absorption wavelength of water, is provided in the path for blowing air to the material to be dried for drying, and water molecules in the blown air are provided. By sufficiently absorbing and activating the electromagnetic waves to the dried material, the water molecules are strongly absorbed into the dried material due to being activated, and the water molecules in the dried material are subdivided. In addition, it is possible to facilitate the transfer of water from the inside of the material to be dried to the surface and improve the drying efficiency.

Furthermore, when dehumidified air having a drying driving force at room temperature is used for ventilation, high quality drying can be further achieved and radiant energy in the absorption wavelength band of water can be increased. Furthermore, by attaching a radiator that radiates the absorption wavelength band of water to a container for drying the material to be dried or by configuring the drying container itself with the radiator, the drying efficiency can be further improved, and It is also possible to facilitate the transfer of water and to dry to uniform water.

Next, the temperature value of the radiator installed in the path for blowing air is measured, and the temperature of the blowing air is controlled based on this value to radiate a large absorption wavelength band of water to increase the radiant energy. This makes it easier to transfer water from the inside of the material to be dried to the surface and enhances the drying efficiency.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Several embodiments of the method and apparatus of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is an explanatory view of a drying device for carrying out the drying method according to the present invention. Other configurations are the same as those of the conventional ventilation drying device, except that a radiator that radiates a large amount of electromagnetic waves having an absorption wavelength of water is provided in a path for blowing air to the object to be dried, which will be described later.

In the figure, reference numeral 1 is a blower, which is driven by an appropriate driving means, and the blown air is sent to a space 4 below a drying container 3 for the material to be dried via an air passage 2. The air for drying is fed with grains such as rice and wheat, or marine products such as dried fish,
After passing through the material to be dried 5 such as plastic, powdered fluid such as fertilizer, etc., it is opened to the atmosphere from above. Far-infrared ceramics (for example, Resonium Japan Ceram Co., Ltd.)
A radiator A that radiates a large amount of electromagnetic waves having the absorption wavelength of water is arranged. Although the radiator A is arranged in two stages in the figure, the radiator A may be provided in appropriate stages depending on the drying conditions of the material to be dried or the air supply conditions.

In this embodiment, air at room temperature is blown into the air passage 2 by the blower 1. This radiator A radiates more electromagnetic waves around 6 μm, which is the absorption wavelength band of water, at room temperature. By passing through the radiator A, the water molecules in the blown air sufficiently absorb the electromagnetic waves and become activated. In that state, the blown air is sent to the lower space 4 of the drying container 3. The activated water molecules are strongly absorbed into the material to be dried 5, and the water molecules in the material to be dried 5 are subdivided. As a result, the moisture in the material to be dried can be easily transferred to the surface and the drying efficiency can be improved.

FIG. 2 shows another embodiment of the present invention.
In this embodiment, a control device 10 capable of adjusting the humidity and temperature of the blown air is provided upstream of the blower, and a temperature sensor 11 is provided inside or in the vicinity of the electromagnetic wave radiator A, and the information of the temperature sensor 11 is stored as described above. It is adapted to be input to the control unit of the control device 10. In this embodiment, since the temperature of the radiator A is measured by the temperature sensor 11 and is input to the control unit of the control device 10, the blowing temperature can be constantly maintained at an arbitrary set temperature.
It is possible to arbitrarily select and use as the radiator A radiators having different temperature ranges that radiate more electromagnetic waves, which are absorption wavelength bands of water.

FIG. 3 shows still another embodiment of the present invention. In this embodiment, the drying container 3 is composed of a radiator A'that radiates more electromagnetic waves in the absorption wavelength band of water, such as far-infrared ceramics, and other structures are the same as those shown in FIG. is there. In this case, it is possible to irradiate the material to be dried with an electromagnetic wave in the absorption wavelength band of water not only during dry ventilation but also during so-called storage when ventilation is not performed. As a result, the moisture can be easily transferred between the materials to be dried, and the uniform moisture can be dried even during the storage.

In the embodiment of FIG. 3, the drying container 3
Although the whole is shown to be composed of a radiator that radiates more electromagnetic waves, which is the absorption wavelength band of water, only a part of the drying container should be made of such a material, such as the one on the wall of the drying container. It is also possible to adhere such a material, and further, to fix such a material inside the drying container by an appropriate means, the same effect can be obtained.

[0022]

INDUSTRIAL APPLICABILITY In the present invention, a far-infrared radiator having a large radiation energy of a wavelength absorbed by water molecules is selected, or an ordinary far-infrared radiator has a radiation energy of a wavelength absorbed by water. By using in the temperature range where radiation is most radiated, that is, the room temperature range, it is possible to facilitate the movement of water from the inside of the material to be dried to the surface during storage in the drying step and improve the drying efficiency.

[Brief description of drawings]

FIG. 1 is an explanatory view of an embodiment of a drying apparatus that carries out the method of the present invention.

FIG. 2 is an explanatory view of another embodiment of the drying device for carrying out the method of the present invention.

FIG. 3 is an explanatory view of still another embodiment of the drying device for carrying out the method of the present invention.

[Explanation of symbols]

1 ... Blower, 2 ... Air passage, 3 ... Drying container, 5 ... Object to be dried,
10 ... Humidity / temperature control device, 11 ... Temperature sensor, A ...
A radiator that emits more electromagnetic waves, which is the absorption wavelength band of water

Claims (8)

[Claims] 1. A radiator that emits a large number of electromagnetic waves having an absorption wavelength of water is provided in a path for blowing air to an object to be dried, and water molecules in the blown air absorb the electromagnetic waves of that wavelength to activate the particles to be dried. A drying method characterized in that air is blown to an object, whereby water molecules in the object to be dried are subdivided so that water can be easily transferred from the inside of the object to be dried to the surface. 2. The drying method according to claim 1, wherein dehumidified air at room temperature is blown in order to facilitate generation of an electromagnetic wave having a wavelength absorbed by water molecules in the radiator. 3. The temperature of the radiator is measured, and the blast temperature is controlled so that the radiator is maintained at a temperature at which more electromagnetic waves having an absorption wavelength of water are radiated. And the drying method according to 2. 4. By arranging the radiator also in the drying container for the material to be dried, facilitating the transfer of water between the objects to be dried stored in the drying container, thereby drying to uniform water content. The drying method according to any one of claims 1 to 3, which is characterized in that. 5. The drying method according to any one of claims 1 to 4, wherein the electromagnetic wave emitted by the radiator in a larger amount has a wavelength of 5 to 7 μm. 6. A drying container for the material to be dried and a blower are provided,
A drying device characterized in that a radiator that radiates a large number of electromagnetic waves having a water absorption wavelength is provided in a path for blowing air to a drying container. 7. The drying device according to claim 6, further comprising: a temperature measuring unit for the radiator, and a control unit for controlling a blast temperature based on information from the temperature control unit. 8. The drying apparatus according to claim 6, wherein a radiator that radiates a large amount of electromagnetic waves having a water absorption wavelength is also located in the drying container.