JP2716030B2 - Electromagnetic wave heating device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic wave heating apparatus for heating and dewatering wastes, particularly those containing a large amount of water, such as raw materials, using electromagnetic waves including microwaves.

[0002]

2. Description of the Related Art Conventionally, electromagnetic wave heating utilizing the large dielectric loss of water has already been widely used in industrial and household microwave ovens. Such an electromagnetic wave heating device is configured to guide an electromagnetic wave into a metal cavity in which an object to be heated is placed. Heat generation of the heating object is proportional to the dielectric loss of the object and the strength of the electric field in the heating object,
For example, if there is a lot of water like garbage,
Since the water is heated by the dielectric loss, if the heating is continued, the water will evaporate soon, and the dehydration treatment can be performed by the electromagnetic wave heating.

In order to perform efficient heating and dehydration, for example, as shown in FIG.
There is an electromagnetic heating device that guides the microwave 101 from the magnetron provided to the waveguide 00 to the waveguide 102. In this electromagnetic wave heating device, the waveguide 102 is arranged vertically, and the output of the microwave 101 is guided from the bottom to the top.
A resin-shaped cone or bowl-shaped container 10 facing downward in the middle of
3 is placed, and the object to be heated 104 is placed in the container 103. At the end of the waveguide 102, there is provided a lid having an electromagnetic wave shielding structure for passing gas but shielding electromagnetic waves, here, a punching metal 105 (for example, Japanese Patent Application Laid-Open No.
217835).

By the way, there has been proposed such an electromagnetic wave heating apparatus in which a stirring blade 106 is built in a container 103. In this case, the heating object 10
Since the container 4 is placed in the container 103, it is possible to perform very efficient heating with less reflection and to prevent uneven heating in the container 103 by the stirring blade 106.

[0005]

However, in the electromagnetic wave heating device having the container 103 shown in FIG.
When the heating object 104 having a large mass is directly input,
Since the storage efficiency is poor and many gaps are generated in the container 103, the amount of the object to be heated 104 to be processed is limited.

Further, a large object to be heated 104 is provided near the tip of the convex (conical) shape of the container 103 having the strongest electric field.
Does not enter, resulting in inefficient heating.

Further, in an electromagnetic wave heating apparatus in which a stirring blade 106 is built in the container 103, a large object to be heated 104 is easily caught between the stirring blade 106 and the container 103. Is stopped and stirring is impossible, so that the stirring effect is impaired. In order to solve this problem, the object to be heated 104 is pretreated.
Must be ground in the same shape and very finely and packed in the container 103.

It is therefore an object of the present invention to provide an electromagnetic wave heating apparatus which enables fine pulverization and agitation during a heating process even for a large mass of an object to be heated, and which has good heating efficiency and no heating unevenness. is there.

[0009]

According to the present invention, there is provided an electromagnetic wave generator for generating an electromagnetic wave, a waveguide for guiding the electromagnetic wave, a stirring rod for stirring an object to be heated, and a stirring rod provided with the stirring rod. And a swingable heating container 5. The heating container has a box shape made of a non-magnetic, low dielectric loss material, and the electromagnetic wave enters the heating container from below the heating container. An electromagnetic wave heating device characterized by the above is obtained.

Further, according to the present invention, the heating vessel has a rotation axis on each of a pair of opposed side faces, and the bottom face of the heating vessel is continuously or intermittently alternately left and right with respect to the incidence of electromagnetic waves. Thus, an electromagnetic wave heating device characterized by having a mechanism for oscillating is obtained.

Further, according to the present invention, there is provided an electromagnetic wave heating apparatus characterized in that a swing angle of the heating container is ± 45 degrees with respect to a bottom surface and an irradiation direction of the electromagnetic wave.

Further, according to the present invention, the stirring rod is made of a non-magnetic, low dielectric loss material, and a plurality of spirally processed rods are positioned parallel to the bottom of the heating vessel. 2. The heating target is stirred by rotating stirring rods in directions facing each other.
An electromagnetic heating device as described is obtained.

Further, according to the present invention, there is provided an electromagnetic wave heating device characterized in that a plurality of nonmagnetic, low dielectric loss pins are mounted on the outer periphery of the stirring rod.

Further, according to the present invention, the electromagnetic wave is guided upward from below, and the heating container in which the object to be heated is stored is stored in a swing basket, and the swing basket transmits the electromagnetic wave. Both sides of the bottom of the heating vessel swing at a right angle to the incidence, a plurality of the stirring rods are mounted in parallel with each other, and one end of the first stirring rod is a first gear, a first gear. 1
The other end is connected to the motor via a third gear, a second intermediate gear, and a fifth gear, and the other end is connected to the motor via a third gear, a third intermediate gear, and a fifth gear. The electromagnetic wave heating device is characterized in that the object to be heated is crushed and agitated by being rotated by the driving of.

[0015]

The electromagnetic wave is guided from the bottom to the top from the electromagnetic wave generator into the waveguide having the vertical structure. A swinging basket is placed in the middle of the waveguide, and a heating container in which an object to be heated is stored is stored. The swinging basket is directly connected to the motor and swings at an angle such that both angles at the bottom of the heating container are perpendicular to the incidence of the electromagnetic wave. At the bottom of the heating vessel is a spiral shaped first with dozens of pins.
And a second stirring rod are mounted in parallel. One end of the first stirring rod is connected to the motor via the first gear, the first intermediate gear, and the second gear, and the other end is connected to the fourth gear, the second intermediate gear, and the fifth gear. The object to be heated is crushed and agitated by being rotated by driving a motor. The container and the stirring rod are made of a non-magnetic, low dielectric loss material having excellent heat resistance.

According to the electromagnetic wave heating device of the present invention, the mechanism for swinging the box-shaped heating vessel and the action of the spiral stirring rod mounted in the heating vessel and having several tens of pins on the outer periphery are large. Pulverization and agitation during heating can be performed even on the mass of the object to be heated. As a result, a pretreatment step of finely pulverizing the object to be heated is unnecessary, and a large-capacity treatment can be performed.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show the configuration of an embodiment of the electromagnetic wave heating device according to the present invention.

Referring to FIGS. 1 and 2, the electromagnetic wave heating device includes an electromagnetic wave (microwave) generating device 1, a waveguide 2 having a rectangular box shape for guiding electromagnetic wave 3, and an object to be heated (see FIG. 1). (Not shown), and a heating vessel 5 having a spiral rod-shaped first stirring rod 14 for stirring the object to be heated. The heating container 5 has a box shape made of a non-magnetic, low dielectric loss material, and is configured to receive the electromagnetic wave 3 from below the heating container 5.

The heating vessel 5 has a first rotating shaft 6 on one side thereof. On the other surface facing one surface of the heating vessel 5, a second rotating shaft 7 is provided. The first rotating shaft 6 is supported by a first bearing 8 a provided on one wall of the waveguide 2. The second rotation axis 7 is the waveguide 2
Is supported by a second bearing 8b provided on the other wall of the second bearing. The first and second rotating shafts 6 and 7 are fixed to the central portions of both side surfaces of the swinging basket 4, and are rotatable about first and second bearings 8a and 8b provided inside the waveguide 2. Is held.

Further, the first rotating shaft 6 is connected to the first joint 9
The first motor 10 mounted outside the waveguide 2 through the
It is directly connected to. Immediately above the swinging basket 4, an electric heater 11 and a fan 12 for sending warm air from the heater 11 as hot air blowing means are directly connected to the third motor 13 and attached to the ceiling wall of the waveguide 2. .

The waveguide 2 has a structure that is long in the longitudinal direction, and a swinging basket 4 is placed on the way and a heating container 5 is housed. The heating container 5 has a mechanism in which the bottom surface swings continuously or intermittently alternately left and right with respect to the incidence of the electromagnetic wave 2 from below to above. The swing angle of the heating container 5 is located such that the bottom surface of the heating container 5 and the irradiation direction of the electromagnetic wave 2 are ± 45 degrees.

The stirring rod 14 is made of a non-magnetic, low-dielectric loss material, is processed into a spiral shape, is positioned parallel to the bottom of the heating vessel 5, and is further rotated by rotating in directions opposite to each other. The object to be heated placed in 5 is stirred. A plurality of non-magnetic, low dielectric loss pins 27 are fixed on the outer periphery of the stirring rod 14 in a pitch of about four at a pitch.

The first stirring rod 14 is rotatably held by a third bearing 15 a and a fourth bearing 15 b provided on the side of the heating vessel 5, and the third bearing 15 a is provided outside the swing basket 4.
, A first gear 16 is mounted. Further, a fourth gear 17 is mounted on a fourth bearing 15b outside the swing basket 4. The first gear 16 houses a fifth bearing 18,
Via a first intermediate gear 19 held on the rotating shaft 6 of
The third motor directly connected to the second motor 20 and the second joint 21
Is connected to the gear 22.

On the other hand, as shown in FIG. 2, the fourth gear 17 is connected to a fifth gear 25 mounted on the end of the second stirring rod 24 via a second intermediate gear 23. Is done. The second stirring rod 24 is formed in a spiral shape opposite to that of the first stirring rod 14, and is rotatably held by a sixth bearing 26 a provided on a side surface of the heating vessel 5. Approximately four pins 27 are fixed on the outer periphery of the second stirring rod 24 at one pitch. As shown in FIG.
A door 29 for opening and closing the inside and outside of the waveguide 2 is provided on the side wall of the waveguide 2 so as to be openable and closable.

Next, a description will be given of a heating and dehydrating treatment of garbage and the like by the electromagnetic wave heating apparatus according to one embodiment of the present invention. First, as shown in FIG. 3, the door 29 is opened, the heating container 5 is taken out of the electromagnetic wave heating device (outside of the waveguide 2), and a heating object 28 such as garbage is put in. Of the first intermediate gear 19 and the first
Is set so that the first gear 16 at the end of the stirring rod 14 meshes well, and the swing basket 4 and the heating container 5 are fixed by the stopper 30.

After closing the door 29, a switch (not shown)
, The electromagnetic wave (microwave) from the electromagnetic wave generator 1
3 is transmitted. When the first motor 10 is driven at the same time, the swinging basket 4 is moved via the first and second rotating shafts 6 and 7.
The bottom surface of the heating vessel 5 is ± 45 with respect to the irradiation direction of the electromagnetic wave 3.
It swings slowly within a range of degrees (direction indicated by arrow A in FIG. 3). Alternatively, a simple operation of temporarily stopping the swing at ± 45 degrees is performed. Due to this swing, more electromagnetic waves 3 are incident on the convex portions that are the two corners 31a and 31b of the bottom surface of the heating container 5, whereby the energy is efficiently absorbed by the heating object 28, and the heating object 28 is stirred. Do.

Further, when the object to be heated 28 is heated and gradually dried, the second motor 20 is driven, and the third gear 22, the first intermediate gear 19 and the first gear 16 are connected. Therefore, the first stirring rod 14 rotates. further,
This power is transmitted through a first stirring rod 14 to a fourth gear 17,
The power is transmitted to the second intermediate gear 23 and the fifth gear 25, and the second stirring rod 24 also rotates in the same direction. At this time, the heating object 28 is gradually pulverized by the dozens of pins 27 fixed to the outer peripheral portions of the first and second stirring rods 14 and 24, and the first and second stirring rods 14 and 24 are crushed. Stirred along 24 spiral grooves. By repeating this state, the object to be heated 28 is further finely crushed and uniformly stirred in the heating container 5.

It is desirable that the material of the structure and bearing used in the waveguide 2 of the present invention be made of ceramic, Teflon, engineering plastic, or the like which is a low-loss dielectric material and excellent in heat resistance.

Although the electromagnetic wave heating apparatus according to the present invention has been described with reference to the above-described embodiment, the present invention is not limited to the above-described embodiment, but includes various aspects according to the principle of the present invention. Of course.

[0030]

As described above, by using the electromagnetic wave heating apparatus of the present invention, the heat treatment of even a large lump of the heating object can be performed by the mechanism for swinging the box-shaped heating vessel and the action of the stirring rod. The inside can be pulverized and agitated. As a result, a pre-treatment step for finely pulverizing the object to be heated is not required, and a large-capacity processing can be performed.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing an embodiment of an electromagnetic wave heating device according to the present invention.

FIG. 2 is a cross-sectional view of a component of a heating container of the electromagnetic wave heating device of FIG. 1 when viewed from a plane.

FIG. 3 is a side sectional view showing a heating process state in the electromagnetic wave heating device of FIGS. 1 and 2;

FIG. 4 is a cross-sectional view showing a schematic configuration of a conventional electromagnetic wave heating device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electromagnetic wave generator 2 Waveguide 3 Electromagnetic wave 4 Rocking basket 5 Heating vessel 6 First rotating shaft 7 Second rotating shaft 8a First bearing 8b Second bearing 9 First joint 10 First motor 11 Heater 12 Fan 13 Third motor 14 First stirring rod 15a Third bearing 15b Fourth bearing 16 First gear 17 Fourth gear 18 Fifth bearing 19 First intermediate gear 20 Second motor DESCRIPTION OF SYMBOLS 21 2nd joint 22 3rd gear 23 2nd intermediate gear 24 2nd stirring rod 25 5th gear 26a 6th bearing 26b 7th bearing 27 pin 28 Heating object 29 Door 30 Stopper 31a, 31b Corner

Claims (6)

(57) [Claims] 1. An electromagnetic wave generator for generating an electromagnetic wave, a waveguide for guiding the electromagnetic wave, a stirring rod for stirring an object to be heated, and a heating vessel 5 having the stirring rod and capable of swinging together with the stirring rod. An electromagnetic wave heating device, wherein the heating container has a box shape made of a non-magnetic, low dielectric loss material, and the electromagnetic wave is incident on the heating container from below the heating container. 2. A mechanism having a rotation axis on each of a pair of opposed side surfaces of the heating vessel, and a bottom surface of the heating vessel swinging continuously or intermittently alternately left and right with respect to incidence of electromagnetic waves. The electromagnetic wave heating device according to claim 1, comprising: 3. The swing angle of the heating container is ± 45 degrees with respect to the bottom surface and the irradiation direction of the electromagnetic wave.
The electromagnetic wave heating device as described in the above. 4. The stirring bar is made of a non-magnetic, low dielectric loss material, a plurality of bars processed into a spiral shape are positioned parallel to the bottom of the heating vessel, and the stirring bars are opposed to each other. The electromagnetic wave heating device according to claim 1, wherein the object to be heated is stirred by rotating in a direction. 5. The electromagnetic wave heating device according to claim 1, wherein a plurality of nonmagnetic, low dielectric loss pins are mounted on the outer periphery of the stirring rod. 6. The electromagnetic wave is guided upward from below, and the heating container in which the object to be heated is stored is stored in a rocking basket, and the rocking basket is heated by an electromagnetic wave incident thereto. The bottom portion of the container swings at an angle that makes a right angle, a plurality of the stirring bars are mounted in parallel with each other, and one end of the first stirring bar has a first gear, a first intermediate gear, 3 is connected to the motor via a third gear, the other end is a third gear,
2. The object to be heated is crushed and agitated by being connected to the second stirring rod via a second intermediate gear and a fifth gear, and being rotated by driving a motor. Electromagnetic wave heating device.