JPH10249858A - Plastic volume reducing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plastic volume reducing apparatus of low electric capacity and energy conservation type adapted to use in a business establishment or store as a recovery place by smoothing dissipation power at the time of treating as much as possible. SOLUTION: This plastic volume decreasing apparatus comprises a plastic container 2 having a supply air outlet 2c and a suction port 2d, an outside route 20 coupling the outlet 2c and port 2d and disposed at outside of the container 2, an air supply unit 5 for circulating hot air in a hot air circulating route 30 formed of the container 2 and the route 20, a thermal storage unit 3a heat exchangeably mounted at the route 30, and a heater 4 for heating the unit 3a. In this case, the heater 4 is previously operated to heat the unit 3a to a high temperature state, and then plastic is heated and volume reduced while circulating hot air.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for reducing the volume of waste plastic such as containers and packing materials generated in small business establishments or stores.

[0002]

2. Description of the Related Art It is desirable to recycle plastics used in food packaging materials, containers, packaging materials, and the like from the viewpoints of reducing waste, saving energy, and saving resources. However, plastics having a low bulk density increase transportation and collection costs, which causes the price of recycled materials to be high. Therefore, as a means for reducing transportation and collection costs and achieving economical recycling, many devices for reducing the volume of plastic before collection have been devised.

For example, in a large-scale accumulation site, a device for mechanically crushing and forming flakes, a device for compressing and packing, and the like have been put to practical use. While these devices used in large-scale dumps can reduce the volume of plastics in an instant, they are large and require a large footprint, which limits their use in small- and medium-scale dumps. . On the other hand, from the viewpoint of reducing transportation costs, it is desirable to reduce the volume as early as possible in the collection. Therefore, in consideration of the physical properties that can be easily reduced by heating even in small and medium-sized accumulation facilities, many devices have been devised, such as a device that melts and reduces the volume by heating with hot air, and a device that mechanically crushes friction and heat dissolves. . As a conventional example of a heating volume reducing device using hot air, there is JP-A-5-274114. This is to reduce the volume of plastic waste by heating it at a low temperature and then compressing it. Also, Japanese Patent Application Laid-Open No. 5-53
The apparatus 909 is for reducing the volume of plastic by making it half-dissolved with hot air.

[0004]

Many of the devices used in small and medium-scale accumulation facilities are designed to reduce the size of the device and improve the installability by incorporating heating of plastic into the process. On the other hand, in order to promote plastic recycling, in addition to volume reduction before transportation and collection, energy saving during processing is also an important point to reduce equipment operation costs. However, many devices, including the invention of JP-A-5-274114, require a large amount of electricity or petroleum energy when plastic volume is reduced. Further, in a device using electricity, since the heating temperature is controlled so as to reach the set heating temperature as quickly as possible in the early stage of the heating, there is a problem that the power load increases in the early stage of the heating.
This often places restrictions on the installation location, usage time, and the like. Another problem is that odor gas is generated when waste plastic is heated.

The present invention has been made in consideration of the above-mentioned problems of such a conventional plastic volume reducing apparatus, and has the following effects: to minimize power consumption during processing, to effectively remove gas generated when heating waste plastic; By recovering the amount of heat at that time and reusing it for heating, we promote energy saving in processing, and provide a low-capacity, energy-saving plastic volume reduction device suitable for use in business sites and stores that become recovery sites. The purpose is to do so.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a plastic storage unit having a blow-off port and a suction port, and connecting the blow-out port and the suction port to each other. An outer path arranged outside the section, a blower that circulates hot air in the hot air circulation path configured by the storage section and the outer path, and a heat storage body attached to the hot air circulation path so that heat can be exchanged, A heating section for heating the heat storage element, wherein the heating section is operated in advance to bring the heat storage element to a high temperature state, and then the plastic is heated and reduced in volume while circulating hot air. It is a volume reduction device.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a longitudinal sectional view of a main part showing a first embodiment of the present invention. In FIG. 1, 1 is a main body exterior, 2 is a storage part, 2a is a storage container made of expanded polystyrene, 2b
Is a lid provided at the upper portion of the storage container, 2c is a hot air outlet provided at the upper portion of the storage container, and 2d is a hot air suction port provided at the lower portion of the storage container. The heat storage unit 3 is a heat storage body 3a made of metal.
And a heat exchanger 3b. The electric heater 4 is a heat storage body 3
The heating unit for heating a and the blower fan 5 are blowers for circulating hot air. The temperature detector 6 detects the temperature of the circulating hot air.
The outer passage 20 has a hot air outlet 2c and a hot air suction port 2c.
and a temperature detector 6, a blower fan 5, and a heat exchanger 3b on the path. Further, a hot air circulation path 30 is formed by the outer path 20 and the storage section 2.

Next, the operation of the embodiment will be described. Prior to the start of the process, the heating unit 4 is energized to
a is heated in advance to a high temperature state. Next, after opening the lid 2b and putting plastic into the storage container 2a and closing the lid 2b, the blower fan 5 is operated to start blowing. At this time, the heat exchanger 3b extracts heat from the heat storage unit 3a, raises the temperature of the circulating air, and heats the plastic contained in the storage unit 2.

Since the plastic volume reducing apparatus of the present invention heats plastic and thermally shrinks or melts it to reduce the volume, high-speed circulation of hot air in the apparatus is required to quickly heat the plastic. To increase the heat exchange efficiency. If the blower fan 5 and the heating unit 4 are operated simultaneously with the start of the plastic heating process, a large electric capacity is required at the time of startup. However, in the present embodiment, the heating unit 4 is operated to preliminarily store the heat storage element. After heating and storing heat, the blower fan 5 is operated,
By performing the plastic heat treatment using the heat amount obtained from the heat storage body 3a, the heating characteristics can be maintained without increasing the electric capacity at the time of startup. Further, since the heat storage body 3a in the high temperature state quickly raises the temperature of the hot air, a large amount of heat can be applied to the plastic at one time. By storing the heat in the heat storage unit 3 in advance as described above, it is possible to quickly shrink or melt to perform the volume reduction processing.

In this embodiment, the heat storage 3
Since the temperature a is high at the start of the plastic heat treatment, the temperature of the hot air at the outlet 2c increases, and the amount of heat applied to the plastic increases, so that the plastic can be heated quickly.
However, when processing plastic that generates a large amount of flammable gas during heat shrinkage, rapid heat shrinkage is not preferable in terms of safety of the apparatus. Therefore, the temperature of the circulating hot air is measured by the temperature detection unit 6 provided in the hot air circulation path near the entrance of the blower fan 5. Based on the measured temperature, the amount of heat applied to the plastic is controlled by increasing or decreasing the amount of air blown. It is necessary to set heating conditions such as hot air temperature according to the thermophysical properties of the plastic.

The specific effects of the present embodiment will be described with reference to an example in which expanded polystyrene is treated. In this embodiment, about 700 g of expanded polystyrene is placed in a processing vessel having a capacity of about 80 liters, and heat is taken out from a heat storage body having a weight of about 6 kg which has been heated to 700 ° C. in advance by a heater having an electric capacity of 1.2 Kw. Heat treatment with hot air at the upper limit. On the other hand, in the configuration in which the temperature of the hot air is raised at the same time as the start of the process, control is required so that the temperature of the hot air rises to the set value as quickly as possible. Heater input power is required. That is, according to the above example, it is confirmed that by storing heat in advance, it is possible to greatly reduce the input power during the processing. In particular, when the size of the apparatus is increased, it is necessary to increase the electric capacity of the heating heater in order to maintain the same heating characteristics as that of the small apparatus, but the electric power is stored in the heat storage unit without increasing the electric capacity. This can be dealt with by increasing the amount of heat, so that the effect of heat storage is further increased.

Next, a second embodiment of the present invention will be described. FIG. 2 is a longitudinal sectional view of a main part showing a second embodiment of the present invention. This embodiment has substantially the same configuration as that of the first embodiment shown in FIG. 1, and therefore the description of the same portions will be omitted, and only different points will be described. The difference from the first embodiment is that a combustion unit 7 using a flame and a combustion heat exchange unit 8 are used instead of an electric heater as a heating unit.

Next, the operation of the present embodiment will be described focusing on differences from the first embodiment. In the present embodiment, the combustion heat generated in the combustion unit 7 is used,
The heat storage unit 3a is heated by the combustion heat heat exchange unit 8.

In the heating method using the electric heater shown in the first embodiment, even if the heat storage element 3a is used, it is necessary to increase the electric capacity to some extent when increasing the plastic heat treatment capacity. On the other hand, in the present embodiment in which the heat storage body 3a is heated using combustion, even when the plastic heating processing capacity is increased, the electric capacity of the apparatus does not change so much, and the installation of the large capacity apparatus becomes easy.
In addition, the use of oil or gas fuel makes it possible to reduce the processing cost as compared with the use of an electric heater. further,
By adopting a method of heating the heat storage body 3a in advance, the adjustment of the hot air temperature is simplified as compared with a conventional apparatus using direct combustion heat for heating. In addition, since the heat storage body 3a is used, it is not necessary to always operate the combustion unit 7 during the plastic heat treatment, so that there is an effect that energy saving can be promoted.

In the present embodiment, the combustion section 7
Is described as a flame combustor, but the present invention is not limited to this, and a catalytic combustor may be used. In the present embodiment, the combustion unit 7
It has been described that the heat storage 3a is heated by the combustion heat heat exchanging unit 8 using the combustion heat generated in the above. However, a configuration in which the heat storage 3a is directly heated by the combustion heat (for example, the heat storage 3a The same effect can be obtained with the configuration in which is heated.

Next, a third embodiment of the present invention will be described. FIG. 3 is a vertical sectional view of a main part showing a third embodiment of the present invention. This embodiment has almost the same configuration as that of the first embodiment shown in FIG. 1, and therefore, the description of the same portions will be omitted, and only different points will be described. The difference from the first embodiment is that a hot air bypass 9 is provided for the heat storage heat exchanger 3b, and a bypass fan 10 for blowing air to the bypass 9 is provided.
And the point where the temperature measuring unit 6 is disposed near the hot air outlet 2c.

Next, the operation of the present embodiment will be described focusing on differences from the first embodiment. In this embodiment, in order to control the temperature of the circulating hot air, the bypass fan 10 is operated, and a part of the circulating hot air is bypassed through the bypass 9 and the heat storage heat exchanger 3b.

This embodiment simplifies hot air temperature control in the apparatus of the first embodiment. For example, a polyvinyl chloride resin needs to be heated at 180 ° C. or lower in order to minimize the generation of chlorine-based compounds. Further, in order to surely heat-shrink the expanded polystyrene, it is desirable to heat at 130 ° C. or more. For example, plastics have different physical properties depending on the kind, and appropriate heating temperatures also differ. However, in the first embodiment, the temperature of the circulating hot air cannot be controlled with the same configuration. Further, the amount of heat given to the plastic can be adjusted by controlling the amount of hot air circulation. However, if the heating temperature is set low, there arises a problem that the amount of circulation air becomes small and it becomes difficult to warm up. Therefore, the bypass 9 is connected to the heat storage heat exchanger 3
b, a part of the low-temperature circulating hot air is passed through the bypass 9 and bypasses the heat storage heat exchanger 3b. This makes it possible to control the temperature of the circulating hot air.
Further, when the heat storage unit temperature is high and the air is rapidly blown to the heat storage unit 3, the circulating hot air temperature rises rapidly. While rapid heating is possible, when plastics that generate a large amount of combustible gas, such as expanded polystyrene, are heated, there is a danger of gas ignition and the like. This can be dealt with by increasing the amount of air blown to the bypass at the start of processing to suppress a rapid rise in temperature of the circulating hot air.

Next, a fourth embodiment of the present invention will be described. FIG. 4 is a longitudinal sectional view of a main part showing a fourth embodiment of the present invention. This embodiment has almost the same configuration as that of the first embodiment shown in FIG. 1, and therefore, the description of the same portions will be omitted, and only different points will be described. The difference from the first embodiment is that the heat storage body 3a is formed of a ceramic honeycomb wound around a heating coil 40 as a heating unit on the outside,
The point is that the heat exchanger in the hot air circulation path is omitted, and the heater 11 for hot air heating and the temperature measuring unit 6 are provided near the outlet of the heat storage unit 3.

Next, the operation and the basic effects of the present embodiment will be described focusing on the differences from the first embodiment. In the first embodiment, the circulating wind extracts heat from the heat storage unit 3a via the heat exchanger 3b,
In the present embodiment, the heat storage body 3a is formed into a honeycomb shape having small airflow resistance, and the circulating air directly exchanges heat with the heat storage body 3a. Therefore, the loss at the time of heat exchange can be reduced, and the heat exchanger can be omitted.
In addition, by providing the heater 11 for hot air heating and the temperature measuring unit 6 near the outlet of the heat storage unit 3, when the heat storage heat amount of the heat storage unit 3a decreases and the circulating hot air temperature cannot be controlled,
The hot air temperature can be adjusted by the hot air heater 11 without reheating the heat storage body 3a.

It is also possible to adopt a configuration in which an oxidizing catalyst is carried on at least a part of the heat storage body 3a of the present embodiment, and the oxidizing catalyst is sequentially oxidized during the circulation to effectively reduce odor gas. During plastic heating, gas components are generated depending on the type. For example, when heating expanded polystyrene, a large amount of odorous gas such as styrene as a residual monomer and toluene as a foaming aid is generated in a large amount, thereby causing odor. However, the heat storage body 3a carrying the oxidation catalyst is
Under the condition of heating to a high temperature of 0 ° C. or more, it has been confirmed that if the gas in the apparatus is circulated at least 10 times per minute through the oxidation catalyst section, the gas components can be almost deodorized finally. .

In this embodiment, the heat storage 3
Although a is a ceramic honeycomb-shaped regenerator, a similar effect can be obtained even if the regenerator is made of a material such as a ceramic block, a metal mesh, or a metal block, and has a structure that has air permeability and can exchange heat on its surface. .

Next, a fifth embodiment of the present invention will be described. FIG. 5 is a vertical sectional view of a main part showing a fifth embodiment of the present invention. This embodiment has almost the same configuration as that of the first embodiment shown in FIG. 1, and therefore, the description of the same portions will be omitted, and only different points will be described. The difference from the first embodiment is that a hot air circulation path is branched into an outside air intake 16 and an exhaust path 12, and a heater for heating the catalyst is provided inside the exhaust path to form a platinum group oxidation catalyst. A catalyst reaction unit 13, an exhaust fan 14, and an exhaust heat / heat exchange unit 15 are provided. The exhaust heat exchange unit 15
At the outlet side of the catalytic reaction unit 13, the heat storage unit 3 in the hot air circulation path
It is located near the exit.

Next, the operation of this embodiment will be described focusing on the differences from the first embodiment. In the present embodiment, the catalyst blower fan 14 is operated to blow a part of the circulating hot air during processing to the catalyst reaction unit 13, and the exhaust heat after the catalytic reaction is combined with the circulating hot air and heat by the exhaust heat heat exchange unit 15. After being exchanged and used for heating the plastic, it is discharged to the outside air and fresh outside air is taken into the apparatus from the outside air intake 16.

As explained in the fourth embodiment, many plastics generate gas when heated. For example, expanded polystyrene generates a large amount of odorous gas and residual expanded gas, and polypropylene generates a hydrocarbon-based gas. In addition, the residual beverage components are volatilized from the PET bottle to generate odor. The present embodiment deals with such gas and odor, and a part of the gas component generated during the heat treatment is deodorized through the catalytic reaction unit 13 and then exhausted. At the same time, the same amount of fresh air is taken into the apparatus from the outside air intake 16 and purged, thereby reducing the concentration of generated gas in the apparatus. On the other hand, in order to effectively deodorize the catalyst reaction section 13, a heater for heating the catalyst is provided inside the catalyst reaction section 13 to heat the catalyst to 300 ° C. or more. If the gas is exhausted as it is, the temperature at the outlet of the exhaust port becomes 180 ° C. or higher. Therefore, in the present embodiment, on the outlet side of the catalytic reaction unit 13, near the outlet of the heat storage unit 3 in the hot air circulation path,
Is provided, and the amount of heat of the hot air after the catalytic reaction is exchanged with the circulating hot air to be used for heating the plastic. This has made it possible to save energy when heating plastic. In particular, when the expanded polystyrene is subjected to heat volume reduction processing in the present embodiment, a particularly large energy saving effect is produced. When foamed polystyrene is heated, a large amount of residual components of a combustible gas, such as butane, pentane, and cyclohexane, are generated in addition to the odorous gas. Although the amount of generation differs in the foaming state, gas components are generated to a considerable extent. For example, the generated calorific value of the expanded polystyrene corresponding to the present embodiment was about 0.11 kcal / g. This heat is generated in the catalytic reaction section 13 and can be used for plastic heating by exchanging heat with circulating hot air in the exhaust heat heat exchange section 15 provided near the outlet of the catalytic reaction section. Thereby, as in the first embodiment,
The power consumption was reduced by about 20% compared to the case where plastic heating was performed only by heat storage body heating. Further, in the present embodiment, the catalyst in the catalytic reaction section 13 is a white metal-based oxidation catalyst, but any other oxidation catalyst may be used as long as the treatment conditions can be optimized and the same effect can be obtained. .

In the present embodiment, air is blown to the catalyst reaction section 13 using the catalyst blower fan 14, but air may be blown using the pressure of the blower fan 5. In addition, not only the exhaust heat after the catalytic reaction is exchanged with the circulating hot air in the exhaust heat heat exchanging unit 15, but also the exhaust heat is introduced into the outer periphery of the storage unit 2 to warm the storage container 2 a, and is introduced into the heat storage unit 3. Energy can be saved even when the heat storage body 3a is heated.

Next, a sixth embodiment of the present invention will be described. FIG. 6 is a longitudinal sectional view of a main part showing a sixth embodiment of the present invention. This embodiment has substantially the same configuration as that of the fifth embodiment shown in FIG. 5, and therefore the description of the same portions will be omitted, and only the differences will be described. The fifth embodiment is different from the fifth embodiment in that a circulating water path 17a, a circulating device 17b, a water storage tank 17c, a hot water outlet 17d, a hot water heat recovery section 17 having a water suction port 17e are provided, and an exhaust heat heat exchange section 15 is provided. At the outlet side of the catalytic reaction section 13 so as to exchange heat with the circulating water passage 17a.

Next, the operation of the present embodiment will be described focusing on differences from the fifth embodiment. In the fifth embodiment, the exhaust heat after the catalytic reaction is exchanged with the circulating hot air in the exhaust heat heat exchanging section 15 to be used for heating the plastic, whereas in the present embodiment, the exhaust heat after the catalytic reaction is used. The hot water obtained by exchanging exhaust heat with water in the exhaust heat exchange section 15 is stored in the water storage tank 17c.

In this embodiment, similarly to the fifth embodiment, the exhaust heat after the catalytic reaction is effectively used. Hot water can also be used to keep the equipment warm or supply hot water, making it possible to widely use exhaust heat.

Next, a seventh embodiment of the present invention will be described. FIG. 7 is a vertical sectional view of a main part showing a seventh embodiment of the present invention. This embodiment also has substantially the same configuration as the fifth embodiment shown in FIG. 5, and therefore the description of the same portions will be omitted, and only different points will be described. The difference from the fifth embodiment is that a catalytic reaction unit 13 is arranged in the heat storage unit 3a.

Next, the operation of the present embodiment will be described focusing on differences from the fifth embodiment. In the fifth embodiment, the catalyst reaction section 13 is provided with a heater for heating the catalyst and heats the catalyst to 300 ° C. or higher. However, in the present embodiment, the catalyst is heated to 700 ° C. in advance. The catalytic reaction unit 13 is heated by placing the catalytic reaction unit 13 in the heat storage unit 3a in a high temperature state. Thereby, the catalytic reaction unit 13
Reduce the energy consumed for heating. In addition, since the heat generated in the catalytic reaction section 13 can be transferred to the heat storage body, it can be used for heating plastic.

In the above-described first to seventh embodiments, the heat storage unit 3 and the storage container 2a are provided independently, but the heat storage unit 3 and the storage container 2a are integrally formed. The heat storage unit 3 covers the outside of the storage container 2a.
By adopting a configuration in which is installed, the heat radiation from the heat storage unit 3 can be used for heating the plastic, and the energy saving of the processing can be promoted.

In the first, third to seventh embodiments, the electric heater 4 as the heating unit and the power supply of the other device control unit are provided as separate power supplies, and the electric heater 4 uses midnight power. A configuration in which the heat storage unit 3 is operated and heat is stored in the heat storage unit 3 at midnight is also possible. This makes it possible to shorten the time required for starting up the heat storage unit 3 and level the use of day and night power, and to use relatively cheap nighttime power and reduce processing costs.

Further, in the first, third to seventh embodiments, the heat storage material of the present invention is a metal, but other materials having a large heat capacity such as ceramic may be used.

In the configuration of the third embodiment, a bypass 9 and a bypass fan 10 are provided in order to simplify the hot air temperature control in the apparatus of the first embodiment. Second, in the fourth to seventh embodiments as well, by providing the bypass and the bypass fan similarly, simple hot air temperature control can be performed similarly to the third embodiment.
In the above embodiment, the dedicated bypass fan 10 is used for blowing air to the bypass 9. However, when air is blown using the pressure of the blowing unit 5, the flow rate of the solenoid valve or the like is set at the branch point with the bypass 9. An adjusting mechanism may be provided to adjust the amount of air blown to the bypass 9.

In the fourth embodiment, the heater 11 for hot air heating and the temperature measuring unit 6 are provided near the outlet of the heat storage unit 3, so that the heat storage heat amount of the heat storage unit is reduced and the circulating hot air temperature is reduced. When the control becomes impossible, the heat storage body 3a
The hot air heater 11 can adjust the hot air temperature without reheating the heater, but the same effect can be obtained by applying this configuration to other embodiments.

Incidentally, it is needless to say that the volume reduction effect can be further improved by providing a plastic compression mechanism after heating in the configuration of the present apparatus. This is because when a plastic is heated to a temperature equal to or higher than the glass transition temperature, its strength is reduced and plastic deformation can be easily performed. Therefore, plastics with little heat shrinkage, such as bottles of polyethylene terephthalate resin, can be significantly reduced in volume by compression. As a compression mechanism, there is a device for applying a stress such as a configuration in which a movable plate is placed at the bottom of a storage container and the movable plate is moved upward by air pressure or a motor to compress the rack, a pin-and-pinion configuration, or a configuration in which a load is applied from above. Any configuration can be used as long as it can apply the necessary force to plastically deform the plastic with reduced strength.

[0039]

As is apparent from the above description, the present invention makes the power consumption during processing as smooth as possible,
Effective removal of gas generated during heating of waste plastic, recovery of heat at that time and reuse of the heat for heating to promote energy saving in treatment, so that it can be used at business sites and stores that become recovery sites It is possible to provide a low-capacity, energy-saving type plastic volume reducing device suitable for a device.

That is, the first aspect of the present invention can provide a plastic volume reducing device which reduces the maximum power consumption at the time of starting heating and realizes rapid plastic heating.

The present invention according to claims 2, 15, and 16
It is possible to provide a plastic volume reducing device that controls a heating state of a plastic and performs a process in accordance with the thermophysical property.

In addition, according to the ninth and twelfth aspects of the present invention, the heat treatment is performed by effectively removing the generated gas and recovering the exhaust heat and using it for circulating hot air, a processing vessel and a heat storage element. A plastic volume reducing device that promotes energy saving at the time can be provided.

According to a seventh aspect of the present invention, there is provided a plastic volume reducing device having a simple structure by employing a structure in which a circulating hot air is directly heat-exchanged by using a heat storage material having a material or shape having air permeability. be able to. In addition, the present invention of claim 8 can provide a plastic volume reducing device that easily removes odor.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view of a main part showing a first embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of a main part showing a second embodiment of the present invention.

FIG. 3 is a vertical sectional view of a main part showing a third embodiment of the present invention.

FIG. 4 is a vertical sectional view showing a main part of a fourth embodiment of the present invention.

FIG. 5 is a vertical sectional view of a main part showing a fifth embodiment of the present invention.

FIG. 6 is a vertical sectional view showing a main part of a sixth embodiment of the present invention.

FIG. 7 is a vertical sectional view showing a main part of a seventh embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body exterior 2 Storage part 2a Storage container 2b Cover 2c Hot air outlet 2d Hot air suction port 3 Heat storage part 3a Heat storage body 3b Heat exchanger 4 Electric heater 5 Blow fan 6 Temperature detection part 7 Combustion part 8 Combustion heat exchange part 9 Bypass REFERENCE SIGNS LIST 10 bypass fan 11 heater for hot air heating 12 exhaust path 13 catalyst reaction unit 14 catalyst blowing fan 15 exhaust heat exchange unit 16 outside air intake 17 hot water heat recovery unit 17a circulating water path 17b circulating device 17c water storage tank 17d hot water outlet 17e water absorption Mouth 20 Outer path 30 Hot air circulation path 40 Heating coil

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Jiro Suzuki 1006 Kazuma Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd.

Claims (16)

[Claims] 1. A plastic storage unit having a blow-off port and a suction port for blowing air, an outlet path connected to the blow-out port and the suction port, and an outer path disposed outside the storage section; and a storage section and an outer path. An air blowing unit that circulates hot air in the hot air circulation path, a heat storage unit attached to the hot air circulation path so that heat can be exchanged, and a heating unit that heats the heat storage unit, and the heating unit is provided in advance. A plastic volume reducing device characterized by heating and reducing the volume of plastic while circulating hot air after operating the heat storage body to a high temperature state. 2. The apparatus according to claim 1, further comprising a temperature detector for circulating hot air in the hot air circulation path, and a calorie adjusting means for adjusting the amount of heat supplied to the plastic in accordance with the temperature of the circulating hot air detected by the temperature detector. The plastic volume reducing device according to claim 1, wherein: 3. The plastic volume reducing device according to claim 2, wherein said heat amount adjusting means is means for increasing / decreasing a blowing amount of circulating hot air in said blowing section. 4. The heat amount adjusting means includes a bypass of circulating hot air that branches off the outer path and does not pass through the heat storage body, and a flow control unit that changes a flow rate ratio between the bypass and the heat storage body. 3. The plastic volume reducing device according to claim 2, wherein the device is a means for operating the flow control unit based on a signal from the temperature detecting unit to adjust the temperature of the circulating hot air. 5. The apparatus according to claim 1, wherein the flow rate control unit is constituted by two blowers, one blower is provided on the bypass side, and another blower is provided on the outer path. The plastic volume reducing device according to claim 4, wherein the flow rate ratio is changed. 6. The plastic volume reduction according to claim 4, wherein the amount of air blown to the bypass at the start of the volume reduction process is increased to suppress a rapid rise in temperature of the circulating hot air. apparatus. 7. The plastic volume reduction according to claim 1, wherein the heat storage body is made of a material or a shape having air permeability, and the heat storage body and the circulating hot air directly exchange heat. Device. 8. The plastic volume reducing device according to claim 7, wherein an oxidation catalyst layer is provided on at least a part of the heat storage body. 9. An outside air intake port provided in the outside path, an exhaust path branched from the outside path, and
A catalyst reaction section provided in the exhaust path, and an exhaust heat heat exchange section provided in the exhaust path and capable of exchanging heat with hot air in the hot air circulation path, while taking in outside air from the outside air intake and circulating The at least a part of the hot air is blown to the catalytic reaction section to cause a reaction, and then the exhaust heat heat exchange section exchanges heat with the circulating hot air in the hot air circulation path to exhaust the hot air. The plastic volume reducing device according to any one of the above. 10. The plastic reduction device according to claim 9, wherein the exhaust heat heat exchange unit is provided in the outer path downstream of the heat storage unit and transfers exhaust heat to the hot air circulation path. Container. 11. The plastic volume reducing device according to claim 9, wherein the exhaust heat heat exchanging section is provided on an outer periphery of the storage section and transfers exhaust heat to the storage section. 12. An outside air intake port provided in the outside path, an exhaust path branched from the outside path, a catalyst reaction unit provided in the exhaust path, and a catalyst reaction section provided in the exhaust path. An exhaust heat heat exchange unit is provided, and while taking in outside air from the outside air intake, circulating hot air is blown to the catalyst reaction unit to cause a reaction, and then the heat is exchanged with water in the exhaust heat heat exchange unit and exhausted. The plastic volume reducing device according to any one of claims 1 to 7, wherein: 13. The plastic volume reducing device according to claim 9, wherein the catalytic reaction section is provided in the heat storage body. 14. The plastic volume reducing device according to claim 1, wherein the outer peripheral portion of the storage portion and the heat storage body are integrally formed. 15. An auxiliary heating unit in the hot air circulation path,
A circulating hot air temperature detecting unit for controlling the auxiliary heating unit, wherein when the circulating hot air temperature decreases, the circulating hot air temperature is adjusted by operating the auxiliary heating unit. Item 15. A plastic volume reducing device according to any one of Items 1 to 14. 16. The circulating hot air temperature is adjusted by operating the heating unit to reheat the heat storage unit when the circulating hot air temperature decreases.
The plastic volume reducing device according to any one of the above.