JPH0524602A - Drying processing device - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] To provide a drying treatment device for easily drying foods that require drying and food waste such as leftover foods to prevent spoilage and malodor. [Constitution] A main body container 1 for shielding microwaves, a microwave heating device 3 provided in the main body container 1 for heating a sample such as garbage that needs to be dried, and a water condensing container 6 provided in the main body container 1. A sample container 7 that is a heat-insulating container having a microwave shielding material as a main component provided in the moisture condensing container 6, and a cooling device 9 that cools the moisture condensing container 6.
By drying the sample, its decay and the accompanying generation of malodor are prevented. Further, by using the heat-insulating sample container 7, the sample can be uniformly heated and dried uniformly, so that thermal decomposition of the sample can be suppressed. Furthermore, it is possible to prevent ignition of the sample due to local heating, to suppress mixing of organic substances into discharged water, and to prevent contamination of the exhaust passage and condensed water by organic substances.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drying treatment device,
Especially for foods that need to be dried, cooking wastes that contain a relatively large amount of water, and kitchen wastes such as leftover food that are generated in the kitchen. Regarding the device.

[0002]

2. Description of the Related Art It has been widely practiced to dry foods for long-term storage of foods containing a large amount of water.
As the drying method, hot air drying method, microwave drying method, freeze drying method, spray drying method, etc. are used.
It plays a major role in the preservation of food. Similarly to food, household garbage is generated at home because it contains a lot of water. At present, the garbage that is discarded from ordinary households is collected by local governments and collectively incinerated or landfilled. However, this collective collection requires a certain amount of time for household garbage to be generated and collected, so food waste such as leftover food and cooking wastes may rot and produce a foul odor, especially in summer. There was a problem that the garbage storage area became dirty due to the water from the garbage. Garbage discharged from households is a fundamental factor that causes putrefaction and produces a foul odor, which makes the whole garbage dirty. In order to deal with this household waste problem, several treatment methods have been proposed, especially regarding food waste treatment. Disposer, which is one of them, is a system in which raw garbage is made into small pieces by mechanical force and then discharged into sewage together with water. Apart from this, there is also a method of mechanically squeezing out only the water in the garbage. Combustion methods such as a heating combustion method using a heater and a microwave heating combustion method are to incinerate food waste by incineration to fundamentally eliminate the cause of decay. In addition, a dry-type waste treatment device that uses microwaves, a heater, etc. to finish the treatment in a dry state without burning food waste has also been devised.

[0003]

However, in terms of drying foods, there are few devices that can be easily used at home, and it is a very difficult problem to dry an object evenly from an industrial point of view. ing. In addition, regarding the garbage treatment equipment, in the method using a machine represented by the above disposer, since the water discharged during the garbage treatment contains many organic components, it is harmful to the environment if it is directly discharged into the sewage. In addition, its use is often prohibited at the municipal level from the viewpoint of increasing the wastewater treatment load. In addition, food waste often decomposed due to insufficient dehydration. Further, the combustion method has problems such as generation of toxic gas during combustion and its treatment, and treatment of ash after combustion. In addition, the conventional drying method has a problem in uniformly drying the food waste, and when it is unevenly dried, it partially ignites and burns in the container, or partially decomposes during storage. Had a point.

The present invention solves the above-mentioned problems of the prior art by uniformly drying a sample such as food or food waste that requires drying to prevent spoilage thereof and eliminate the ignition that occurs during drying. An object of the present invention is to provide a drying treatment apparatus suitable for home use, which reduces organic components contained in discharged water.

[0005]

In order to solve the above-mentioned problems, a drying apparatus of the present invention has a main body container which has a door and shields microwaves, and a microwave heating which heats a sample provided in the main body container. A device, a moisture condensing container made of a good heat conducting material provided in the main body container, a lid provided in the moisture condensing container, and a heat insulating container mainly provided with a microwave shielding material provided in the moisture condensing container. It mainly comprises a sample container, a cooling device for cooling the water condensing container, and a drainage path for draining the water separated by heating the sample from the water condensing container.

[0006]

With this structure, the drying apparatus of the present invention provides an apparatus for simply and hygienically drying a sample such as food or food waste that needs to be dried. First, the sample contained in the sample container is heated by irradiation with microwaves to evaporate the water content in the sample. At this time, since the sample container is adiabatic, the heat from the microwave is not radiated from the sample container and is mainly consumed only for evaporation of water. Further, since the sample container is the microwave shielding container, the microwave irradiation space is reduced, and the sample can be efficiently heated by the microwave. The generated water vapor is condensed in a moisture condensing container located outside the sample container. Further, the heat insulation effect of the sample container uniformly heats and uniformly drys the sample, so that thermal decomposition of the sample is also suppressed. Due to this effect, the mixing of organic matter into the discharged water is suppressed, and the pollution of the exhaust path and the condensed water by the organic matter is prevented.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A drying apparatus according to an embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, 1 is a main body container, and 2 is a door that opens and closes when the moisture condensing container 6 and the sample container 7 are taken in and out. Reference numeral 3 denotes a microwave generator as a heating means, which irradiates microwaves from the upper portion of the main body container 1 through the introduction tube 4 and controls by the microwave output controller 5. The moisture condensing container 6 is made of a good heat conductive material, has a rib 6a provided with inwardly projecting pores (not shown) in the vicinity of the opening, and can be detached from the main body container 1. Has become. The sample processing container 7 is a double structure made of stainless steel and is vacuum-insulated, and has a structure in which an upper opening has a flange 7a that is hung from the rib 6a of the moisture condensing container 6. Further, the upper opening of the sample container 7 and the microwave irradiation port are close to each other. Reference numeral 8 denotes a lid located above the water condensing container 6 and the sample container 7, which is a microwave permeable plastic material. The lid 8 is configured to keep airtight with respect to the moisture condensing container 6. Reference numeral 9 is a cooling device for cooling the water condensing container 6, 10 is a drainage path for the water condensed in the water condensing container 6, and 11 is a water trap.

Next, the operation will be described. First open the door 2,
The moisture condensing container 6 is taken out, the sample is put in the sample container 7 housed therein, and the lid 8 is provided to keep the moisture condensing container 6 airtight. Next, the microwave generator 3 as a heating means is energized to heat the sample contained in the sample container 7,
The microwave output control device 5 controls the microwave irradiation conditions. In this embodiment, the microwave output is controlled to be lower than the normal output, or the microwave output control such as intermittently irradiating the microwave is controlled to be low. . The water vapor generated from the sample by microwave heating is discharged into the water condensing container 6 through the pores formed in the ribs 6a of the water condensing container 6 due to the pressure, and the water vapor is condensed into water in the water condensing device 6. At this time, the cooling device 9 is operated to cool the moisture condensing container 6. The condensed water and the gas decomposed and generated from the sample are discharged through the drainage path 10.

When the microwave is radiated with a steady output, the microwave forms a steady wave in the radiating space to easily cause temperature unevenness on the object to be irradiated, resulting in nonuniform drying. Therefore, in addition to the adiabatic effect that the sample container 7 has, the waste treatment device according to the present embodiment irradiates microwaves at a lower output than normal output, or intermittently irradiates microwaves. The output was controlled to be low, and by these synergistic effects, uniform heating and uniform drying of the sample were achieved, and it was possible to suppress the thermal decomposition of the sample. As a result, it is possible to prevent ignition of the sample due to local heating, to suppress mixing of organic matter in the discharged water, and to prevent contamination of the exhaust path and condensed water by organic matter. Further, due to the heat insulating effect of the sample container 7, heat radiation from the sample container 7 is suppressed, and the amount of heat given from the microwave is mainly consumed only for evaporation of water. At the same time, the sample container 7 is made of a metal material and is located relatively close to the microwave irradiation port.
Since the microwave irradiation space is limited to the inside of the sample container 7, the energy efficiency is improved to efficiently heat the sample. Furthermore, due to the good thermal conductivity of the moisture condensing container 6, the water vapor flowing from the sample container 7 into the moisture condensing container 6 can be quickly condensed and discharged. As an evaluation of the heat insulating effect of the sample container 7, a comparative experiment was performed using a plastic container as the sample container 7 and a container that was vacuum-insulated with a double structure of the metal material of this example. In addition, low-power microwave irradiation and microwave output control such as intermittent microwave irradiation were performed at the same time. 600g vegetables, 200g meat and fish,
A sample made up of 100 g of rice was used to evaporate about 90% of the water it contained before treatment. The dried state of the entire sample was evaluated by collecting the discharged water and evaluating the COD value. The measurement result of the final COD value of the separated water shows that the COD value is 2000 mg when the sample container is a plastic container and microwave irradiation with a constant output is performed.
/ L, vacuum-insulated container with double structure of metal material,
CO when irradiated with microwaves at 1/3 of the usual output
The D value was reduced to 800 mg / l. 2 of metal materials
The uniform drying of the sample could be achieved by using the sample container 7 having a heavy structure and vacuum-insulated. In addition, due to the improved heat insulation of the sample container 7 and the limitation of the microwave irradiation space, the energy due to heat dissipation is compared with the case of the plastic container and the sample container 7 vacuum-insulated by the double structure of the metal material. The loss could be suppressed to 2/3. By using a good thermal conductive material for the moisture condensing container 6, the condensation rate of moisture is 20%.
It improved. Furthermore, by keeping the moisture condensing container 6 airtight by the lid 8, the contamination of the main body container 1 and the release of odor to the outside were reduced. In addition, by treating the sample to a state containing almost no water, it was possible to completely prevent spoilage and to prevent the sample from being burnt, so that generation of toxic gas was prevented. In addition, even if combustion should occur, the sample container 7 is made of a metal material, so that the occurrence of fire can be prevented.

Although the drying treatment apparatus of this embodiment is mainly intended for drying garbage, it can be used for drying food. Further, the microwave shielding material of the sample container 7 may be a carbon material or a non-metal material, but it is most preferable to use a metal material, particularly stainless steel. Further, as the sample container 7, a container having a double structure made of a metal material and vacuum-insulated is used. If the sample container 7 has a structure and the thermal conductivity of the entire sample container 7 is 1800 J / m · hr · ° C or less, the effect of the present embodiment can be obtained. When treating food waste as in the present embodiment, the drainage route 10 has an important configuration and drains water from the sample.
It is also possible to store the water generated in the main body container 1. Further, although the sample is directly put in the sample container 7, the sample can be put in a bag and processed. Furthermore, a structure in which a deodorizing device is attached to the water drainage path 10 can be adopted. Further, it goes without saying that the lid 8 itself used for the moisture condensing container 6 having a heat insulating configuration contributes to uniform drying of the sample.

[0011]

As is apparent from the above description of the embodiments, according to the drying apparatus of the present invention, the main body container having a door and made of a material for shielding microwaves, and the drying provided on the main body container are provided. A microwave heating device for heating a sample such as required food or garbage, a moisture condensing container made of a good heat conductive material provided in the main body container, and a microwave shielding material mainly provided in the moisture condensing container The sample container, which is a heat-insulating container, and a cooling device for cooling the moisture condensing container are used to dry the sample, thereby preventing spoilage during storage and generation of an offensive odor. Further, by using the heat insulating sample container, the sample is uniformly heated and can be dried uniformly, so that the thermal decomposition of the sample can be suppressed. Furthermore, it is possible to prevent ignition of the sample due to local heating, to suppress mixing of organic matter with the discharged water, and to prevent contamination of the exhaust path and condensed water with organic matter. Further, due to the heat insulating effect of the sample container, heat dissipation from the sample container is suppressed, and the amount of heat given by the microwave is mainly consumed only for evaporation of water. Furthermore, since the sample container is made of a microwave shielding material and is located relatively close to the microwave irradiation port, the microwave irradiation space is limited to the sample container, and the microwave efficiently heats the sample. Therefore, the energy efficiency is improved and the drying processing time is shortened.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a configuration of a main part of a drying processing apparatus according to an embodiment of the present invention.

[Explanation of symbols]

1 body container 2 doors 3 Microwave generator 6 Water condensing container 7 Sample container 8 lid 9 Cooling device 10 drainage route

Continued front page    (72) Inventor Jiro Suzuki             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd.

Claims (3)

[Claims] 1. A main body container having a door and made of a material that shields microwaves, and a microwave heating device which is provided in the main body container and heats a sample such as food or garbage that needs to be dried. A moisture condensing container made of a good heat conducting material provided in the main body container, and a lid provided on the moisture condensing container,
A sample container which is a heat-insulating container mainly composed of a microwave shielding material provided in the water condensing container, a cooling device for cooling the water condensing container, and water separated by heating the sample from the water condensing container. Drying treatment equipment with a drainage route for discharge. 2. The drying treatment apparatus according to claim 1, wherein the sample container is a vacuum heat insulating container mainly made of a metal material. 3. The drying treatment apparatus according to claim 1, wherein the sample container is a container having a multi-layer structure of a metal material and another heat insulating material.