JP2001194063A - Garbage disposing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve such problems that a garbage disposing device becomes an odor source in conventional garbage disposal machines, that is, garbage is decomposed during storage before and after treatment and the putrefactive odor is generated. SOLUTION: The garbage disposing device is provided with a drying chamber 1 for drying garbage, a hot air generation means for drying garbage while circulating hot air in the drying chamber 1, a deodorizing section 13 to oxidize and decompose the exhaust from the drying chamber 1 by means of a catalyst and deodorize it, and an intake 12 leading the outside air into the drying chamber 1. In the deodorization process in which the bad odor of the dried garbage generated from the drying chamber 1 is oxidized and decomposed in the deodorizing section 13 to deodorize it, air containing oxygen necessary for the oxidation reaction is effectively taken in from the air intake 12 sucking the outside air.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a garbage disposer for treating garbage, that is, garbage, used for ordinary households and businesses.

[0002]

2. Description of the Related Art Conventionally, kitchen waste generated in a kitchen is disintegrated by using a disposer that pulverizes the waste into the sewage, a garbage dewatering machine that recovers the waste by grinding and dewatering, and heating means such as a microwave, a heater or steam. Processing is performed using a kitchen waste treatment machine that completely incinerates or collects by drying.

[0003]

These conventional garbage processing machines have the following problems. The disposer has a remarkably high BOD in the treated wastewater, placing a burden on the sewage treatment plant. Given the current low sewerage penetration in Japan, this is not an appropriate treatment method.

[0004] The garbage dewatering machine does not treat the collected crushed garbage, so that it is liable to rot and may cause a bad smell or a pest or a pathogen.

[0005] Garbage disposal machines using heating means have been detoxified, deodorized, and reduced in weight by incineration and drying to solve the above-mentioned problems. However, the following new problems have arisen. I have. First, the incineration requires a structure that can withstand high temperatures, and requires extremely high durability and safety. Secondly, even in the case of a system in which only the drying process is performed and the incineration is not performed, there is a problem that a large amount of odor and steam are temporarily generated from the kitchen garbage during the heating process. For this reason,
In order to install the device indoors, exhaust equipment is required, which results in large-scale equipment.

Another problem common to conventional kitchen waste disposal machines is that the kitchen waste disposal machine is a source of odor. In other words, the garbage rots while the garbage after the pre-treatment is being stored, and this odor becomes a problem.

An object of the present invention is to provide a kitchen waste disposal machine which can be used indoors and which is free of putrefaction odor and which is intended to be solved by the above conventional structure. And Another object of the present invention is to provide a second means capable of more reliably achieving the object of the first position.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned conventional problems, a kitchen waste treatment machine according to the present invention comprises a drying chamber for drying kitchen waste, and a hot air generator for circulating hot air in the drying chamber to dry the kitchen waste. Means, a deodorizing section for deodorizing exhaust gas from the drying chamber by oxidative decomposition with a catalyst, and an air intake for introducing outside air into the drying chamber. Thereby, in the process of deodorizing the odor of the dried garbage generated from the drying chamber by oxidative decomposition in the deodorizing section, it is possible to effectively take in the air containing oxygen necessary for the oxidation reaction from the air intake for introducing outside air. Therefore, oxidative decomposition can be promoted,
Deodorization efficiency can be increased.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 is characterized in that a drying chamber for drying garbage, hot air generating means for circulating hot air in the drying chamber to dry the garbage, and a catalyst for exhausting air from the drying chamber. By providing a deodorizing section for deodorizing by oxidative decomposition and an air intake for introducing outside air into the drying chamber, the outside air is introduced in the process of deodorizing the garbage generated from the drying chamber by oxidative decomposition in the deodorizing section. Since the air containing oxygen necessary for the oxidation reaction can be effectively taken in from the air intake port, the oxidative decomposition can be promoted and the deodorizing efficiency can be increased.

According to the second aspect of the present invention, since the deodorizing section has a catalyst heating heater for heating the catalyst, the temperature can be raised to the temperature for activating the catalyst, and the deodorizing efficiency can be further improved. An excellent deodorizing effect can always be obtained without lowering the deodorizing performance.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. In FIGS. 1 and 2, reference numeral 1 denotes a drying chamber for drying kitchen garbage, which is provided with a garbage container 2 for storing kitchen garbage and a hot air outlet 3 at the bottom, and can be hermetically closed by a lid 4. The trash container 2 is detachable from the drying chamber 1. Also,
It is made of a breathable material, for example, a mesh structure, and hot air coming out of the hot air outlet 3 can directly hit the kitchen waste inside. Reference numeral 5 denotes a heating unit, which comprises a heater 6 and an adsorbent 7 of one or two types selected from zeolite and activated carbon. Reference numeral 8 denotes a blower that is composed of a fan or the like that blows air for drying the garbage. The air sent from the blower 8 is heated by the heating unit 5 to become hot air, and passes through the hot air outlet 3. It is configured to be sent into the drying chamber 1. That is, the blowing unit 8 and the heating unit 5 for heating the air constitute hot air generating means. Reference numeral 9 denotes a condensing means for condensing gas blown from steam generated from the kitchen to remove water, and is composed of a fin tube and a cooling fan, and condenses the steam generated in the drying chamber 1 by cooling. Has a function to remove. The water cooled and condensed by the condensing means 9 is discharged to the outside through the drain hose 10. The condensing means 9 communicates with the blowing unit 8 and constitutes a circulation path for sending the gas having passed through the condensing means 9 to the blowing unit 8 again. Reference numeral 11 denotes an air intake port provided in the circulation path, which sucks outside air and supplies outside air to the drying chamber 1. This suction is naturally performed by the suction pressure of the fan constituting the blower section 8 and the negative pressure generated when the steam condenses in the condensing means 9. Similarly, reference numeral 12 denotes an air discharge port provided in the circulation path, which naturally discharges air to the outside by the pressure of the fan forming the blower section 8 and the expansion pressure of the heat generated in the heating section 5. 13
Denotes a deodorizing section, which comprises a catalyst heater 14 and a honeycomb-shaped catalyst 15. In this embodiment, the catalyst 15
Uses a metal having a white metal supported on activated alumina or the like. The gas discharged from the air discharge port 12 is deodorized in the deodorizing section 13 and discharged to the outside.

The operation of this embodiment will be described below. The user puts garbage in the trash container 2 and sets it in the drying room 1. The garbage container 2 is detachable from the apparatus, and the user does not need to carry the garbage to the apparatus, and can put the garbage into the garbage container 2 at a place where the garbage is generated and then set the garbage on the apparatus. So it is convenient. When the user closes the lid 4 and turns on a switch (not shown) in this manner, a control device (not shown) operates to operate the fan forming the blower unit 8, the cooling fan forming the condensing means 9, the heater 6, and the catalyst. The heater 14 is energized. The hot air generated by the blowing unit 8 and the heating unit 5 enters the drying unit 1 through the hot air outlet 3 and dries the garbage in the trash container 2. The trash container 2 has a mesh structure, and the kitchen waste inside is uniformly dried. At this time, the higher the temperature of the hot air, the shorter the drying time. However, if the temperature is too high, the garbage tends to carbonize. If the garbage is carbonized, burning odor and smoke are generated, making it difficult to deodorize. In addition, when plastic bags and the like are mixed, there is a risk that chlorine-based gas is generated. Therefore, in this embodiment, the temperature of the hot air is 150 ° C. near the hot air outlet 3.
About. The drying time is shorter as the flow velocity of the hot air is larger, but there is a problem such as noise. Therefore, in this embodiment, the drying time is set to 5 liter / sec. To achieve such a temperature and a flow velocity, electric power of 600 to 700 W is required. The kitchen waste in the garbage container 2 can be efficiently dried by making the kitchen garbage fluid by means of stirring or the like to increase the surface area. However, the present invention does not refer to a method with high drying efficiency.

The gas generated from the kitchen waste in the drying chamber 1 reaches the condensing means 9 while containing a large amount of steam. Condensing means 9
Then the gas cools and the vapor condenses. The condensed water generated at this time is 1 kg of kitchen garbage (the average of the amount of garbage discharged by a family of four a day, fish, meat, vegetables, fruits,
The grains and the like are configured as a certain percentage composition. In the present embodiment, hereinafter, 1 kg of kitchen garbage is represented as kitchen garbage of such a component), and it becomes about 500 to 700 cm ³ and flows down from the drain hose 10. If the cooling system is water-cooled instead of air-cooled, the system becomes complicated mechanically, such as water piping.However, the water-cooled system has a higher cooling effect and condensed water generated when condensed is used for cooling. It is possible to flow together with the drainage of cooling water and it is convenient.

The dried gas from which water has been condensed and removed in this manner is circulated again to the blowing section 8 and the heating section 5 at a temperature of about 50 ° C., becoming hot air and drying the garbage again. In this embodiment of the eyephone, the blowing unit 8 is
And on the upstream side of the heating unit 5. In this way, the temperature of the blower 8 is set to the lowest temperature in this circulation path, and the fan constituting the blower 8 is located at a position that is least affected by the temperature. When the garbage is dried by such a circulating hot air drying method, the garbage finishes drying in about 3 to 4 hours.

[0015] In the drying step, odor components are generated from the kitchen waste. This odor component is most preferably deodorized by a catalytic oxidation method. This is because most of the odor components generated from kitchen waste are organic substances, and the organic substances are decomposed into water and carbon dioxide only by being oxidized, and turned into harmless and odorless gas. This odor is converted to methane in 1 kg of garbage, resulting in a total amount of 6 to 8 liters. To oxidize this, 12 to 16 liters of oxygen and 100 liters of air are used.
Itter is required. Therefore, in this embodiment, the above-described air intake port 11 is provided in order to supply the auxiliary combustion air during the processing time of 3 to 4 hours. In this embodiment, the air intake port 11 is provided on the upstream side of the blower unit 8, that is, on the suction side of the fan, and on the downstream side of the condensing unit 9. In this way, taking advantage of the fact that this place becomes negative pressure,
It tries to take in the outside air naturally. In this case, if a pressure type turbo fan is used as a fan constituting the blower section 8, a negative pressure is likely to be generated, which is an effective means. The size of the hole of the air intake 11 is important, and in this embodiment, the wind speed of the blower 8 is set to 5 lit.
At ter / sec, the inside diameter of the pipe through which the air intake port 11 is formed is 36 mm, and the hole diameter of the air intake port 11 is 3 m.
m. The amount of air taken in under these conditions was 105 liters (1 cm ³ / sec) in 3 hours, and the required amount of air could be obtained.

Next, the odor component will be described in detail. The gas containing the odor in the circulation path is discharged to the deodorizing section 13 outside the circulation path through the air discharge port 12. In this embodiment, the position of the air outlet 12 is on the upstream side of the heating unit 5 and on the downstream side of the drying chamber 1. The reason for this is that, first of all, at this position, the internal pressure of the circulation path at that position becomes high due to the expansion pressure due to the heat of the heating unit 5 and the pressure blown out by the fan that constitutes the blower generation unit 8, and the flow reverses. This is because the gas can be discharged to the outside without any problem. Secondly, this position is because the temperature of the gas in the circulation path is the highest and the humidity is the lowest. That is, deodorization by oxidative decomposition is facilitated. Thirdly, the gas concentration in the circulation path at this position is low. That is, since the odor component has been condensed with the steam and removed to some extent by the condensing means 8, the odor concentration is relatively low, and the deodorization is further facilitated. The gas discharged from the air outlet 12 is oxidized and deodorized by the catalyst 15 heated by the catalyst heater 14 in the deodorizing section 13. This catalyst 1
5 is 1 cm ³ / s in this embodiment.
ec, and the volume of the catalyst 15 of 10 cm ³ is sufficient. That is, it is possible to deodorize with an extremely small catalyst. If the deodorizing section 13 is configured to directly deodorize the gas exhausted from the drying chamber 1 (this method is generally used), the flow rate of the hot air is estimated to be small and 1 liter /
Even if the time is shorter (the drying time is significantly increased if the time is shorter than 1.5 sec), the volume of the catalyst must be 1.5 liter or more. The structure of the catalyst 15 of this embodiment can be said to be a very effective means. In this embodiment, a catalyst in which a platinum group metal is supported on activated alumina or the like is used as the catalyst 15, but the type of the catalyst is not particularly limited. 400 ° C.
And measured the THC (total hydrocarbons: an index approximately representing the concentration of the odor component) in the gas.
The purification rate before the deodorization and after the deodorization could be 99% or more. Also, there was no problem even when the sensory evaluation was performed.

When drying is completed as described above, a temperature sensor (not shown) detects the end of drying, and the control device operates to turn off a switch (not shown). The user may then open the lid 4, take out the trash container 2, and discard the dried garbage inside. This dried garbage is about 200 g with respect to 1 kg of the original garbage weight and has no moisture, so that rot does not progress. This makes it easier to handle kitchen waste that was originally uncomfortable.

However, if the dried garbage is not thrown away and is left in the appliance, or if raw garbage before drying is left in the appliance, the garbage will produce an odor. In this embodiment, as shown in FIG. 1, an adsorbent 7 is incorporated in the heater 5 to deodorize generated odor.
In this case, when the fan of the air blower 8 is operated to forcibly circulate the odor in the circulation path and come into contact with the adsorbent 7, the odor can be more effectively deodorized. However, adsorbents generally have a lifetime. That is, it is not possible to adsorb an odor exceeding the adsorbable capacity. In this embodiment, the adsorbent 7 is incorporated in the vicinity of the heater 6,
Each time the treatment is performed, it is heated. Adsorbent 7
Is to desorb adsorbed odors when heated and to recover adsorption capacity. Therefore, according to the configuration of the present embodiment, the life is not extended and the device can be used for a long time. In this embodiment, zeolite and activated carbon are used as the adsorbent 7. In other words, the odor molecules that zeolite easily adsorbs are molecules with small molecular weight and polarity, and the odor molecules that easily adsorb activated carbon are molecules with large molecular weight and non-polarity. This makes it possible to adsorb odor molecules. However, activated carbon may burn if the temperature is high during regeneration by heating.On the other hand, odor will not desorb unless the zeolite is heated to a high temperature. Should be placed. However, in the present embodiment, only the honeycomb-shaped zeolite was used as the adsorbent 7, but as a result of the sensory test of the odor, the odor around the device in a normal state without any treatment was almost eliminated.

[0019]

As described above, according to the first aspect of the present invention, air containing oxygen necessary for an oxidation reaction can be efficiently taken in, so that oxidative decomposition can be promoted and deodorization can be effectively performed. It is possible to provide a kitchen waste disposal machine that can be used indoors and that does not cause putrefaction odor.

According to the second aspect of the present invention, it is possible to provide a garbage disposal machine that can completely deodorize and can always obtain an excellent deodorizing effect without deteriorating the deodorizing performance.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a kitchen waste treatment machine according to one embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a kitchen waste disposal machine according to one embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drying room 2 Garbage container 3 Hot-air outlet 5 Heating part 6 Heater 7 Adsorbent 8 Blower part 9 Condensing means 10 Drain hose 11 Air intake port 12 Air outlet 13 Deodorizing part 14 Heater for catalyst heating 15 Catalyst

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) F26B 21/04 B09B 5/00 ZABP (72) Inventor Motomichi Mishima 1006 Odakadoma, Kadoma City, Osaka Matsushita Electric Within Sangyo Co., Ltd. (72) Inventor Hisao Tsunaga 1006 Kadoma, Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (2)

[Claims] A drying chamber for drying the garbage; hot air generating means for circulating hot air in the drying chamber to dry the garbage; a deodorizing section for deodorizing the exhaust gas from the drying chamber by oxidative decomposition with a catalyst; Garbage disposer equipped with an air intake for introducing outside air into the drying room. 2. The kitchen waste treatment machine according to claim 1, wherein the deodorizing section has a catalyst heater for heating the catalyst.