JPH05185060A - Garbage disposer - Google Patents

Abstract

PURPOSE:To provide a garbage disposer which is easily constituted and capable of inhibiting generation of odor and being provided indoors. CONSTITUTION:A garbage disposer is constituted of a drying chamber 1 for housing and drying garbage, hot air generating means 5, 8 for blasting hot air to the drying chamber 1 and a cooling part 9 for condensing steam discharged from the drying chamber 1. The cooling part 9 is communicated with the hot air generating means. While the hot air is circulated and garbage is dried, supporting air is introduced from an air intake port 11. Odor of the inside of a circulation route is discharged from a discharge port 12 of air and deodorized in a deodorization part 13 in the downstream side thereof.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a kitchen waste processing machine for processing kitchen garbage, that is, kitchen garbage used for general households and businesses.

[0002]

2. Description of the Related Art Conventionally, kitchen waste generated in a kitchen is disposed by using a disperser for crushing and discharging the sewage as it is, a garbage dewatering machine for crushing and dehydrating, and a heating means such as a microwave, a heater and steam. The kitchen waste is completely incinerated or dried and then recovered using a kitchen waste processor.

[0003]

These conventional kitchen garbage processing machines have the following problems. The disposer has a significantly high BOD of the treated wastewater, which imposes a burden on the sewage treatment plant. Considering the current low penetration rate of sewerage in Japan, it is not an appropriate treatment method.

[0004] Since the garbage dewatering machine does not process the recovered crushed kitchen waste, it is apt to putrefaction, which may cause a bad odor or cause harmful insects or pathogenic bacteria.

The kitchen garbage processor using the heating means is detoxified, deodorized, and reduced in weight by incineration or drying to solve the above problems, but the following problems are newly caused. There is. First, incineration requires a structure that can withstand high temperatures, which requires extremely high durability and safety for the device. 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 garbage during the heating process. Therefore, an exhaust facility is required to install the device indoors, resulting in a large-scale facility device.

Further, as a problem common to the conventional garbage treating machines, there is a problem that the garbage treating machine itself becomes a source of odor generation. In other words, the garbage decomposes during the storage of the garbage after the pre-treatment and this putrid odor becomes a problem.

SUMMARY OF THE INVENTION The present invention is intended to solve the problems of the conventional structure as described above, and it is a first object of the present invention to provide a kitchen refuse disposal machine which does not generate a rotten odor and can be used indoors. Has the purpose of. A second object is to provide a second means capable of achieving the first object more reliably. Further, a third object is to provide a kitchen waste disposal machine which can realize a constant odor removal with a simple structure.

[0008]

The first means of the present invention for achieving the first object comprises an air blowing section for blowing air for drying kitchen waste and a heating section for heating the air. Hot air generating means, a drying chamber for drying garbage, and a condensing means for condensing gas containing steam generated from the garbage to remove moisture, and the hot air generating means is provided on the downstream side of the condensing means. And a circulation path for sending the gas from which moisture has been removed by the condensing means to the hot air generating means again
The circulation route includes an air intake port for taking in air from the outside, an air exhaust port for discharging gas to the outside, and a deodorizing section for deodorizing gas in the circulation route provided on the downstream side of the air exhaust port. It is an opportunity.

The second means of the present invention for attaining the second object is, in addition to the constitution of the first means of the present invention,
The hot air generating means arranges an air blowing part on the upstream side and a heating part on the downstream side, an air intake port is arranged between the air blowing part and the condensing means, and an air discharge port is provided between the heating part and the drying chamber. It is a kitchen waste processing machine with a configuration arranged between them.

A third means of the present invention for achieving the third object is, in addition to the constitution of the first means or the second means of the present invention, selected from zeolite and activated carbon in the heating section. The garbage disposal device incorporates one or two kinds of adsorbents.

[0011]

The first means of the present invention operates as follows.
Since it is dried by hot air, the drying temperature is lower than that of conventional incineration, and the heat resistance of the equipment is not a problem. Further, since this hot air is circulated in a closed path to some extent and only the gas intentionally discharged from the circulating path is deodorized, it is possible to easily completely deodorize a large amount of odor generated at one time.

According to the second means of the present invention, the positions of the air intake port for discharging the gas and the air discharge port are on the negative pressure side and the positive pressure side, respectively. Therefore, the gas in the circulation path can be naturally discharged without using a separate blowing means. Also, the gas sent from the air outlet to the deodorizing section is
Since the temperature is highest and the humidity is lowest in the circulation path, deodorization can be performed more reliably.

Further, according to the third means of the present invention, it is possible to deodorize at room temperature by an extremely simple method, the constant odor can be eliminated, and the adsorbent for deodorizing is not replaced. It can be used semi-permanently.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In FIG. 1 and FIG. 2, reference numeral 1 denotes a drying chamber for drying kitchen waste, which includes a garbage container 2 for storing kitchen waste therein, a hot air outlet 3 at the bottom, and a lid 4 for sealing. The dust container 2 can be attached to and detached from the drying chamber 1. Also,
It has a breathable material, for example, a mesh structure, and hot air coming out from the hot air outlet 3 can directly hit the kitchen waste. Reference numeral 5 is a heating section, which is composed of a heater 6 and an adsorbent 7 composed of one or two selected from zeolite and activated carbon. Reference numeral 8 denotes a blower unit configured by a fan or the like for blowing air for drying the kitchen waste. The wind blown from the blower unit 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 fed into the drying chamber 1. That is, the air blowing unit 8 and the heating unit 5 that heats the air constitute hot air generating means. Reference numeral 9 denotes a condensing unit that condenses the gas containing the steam generated from the garbage to remove the water content. The condensing unit 9 is composed of a fin tube, a cooling fan and the like, and the steam generated in the drying chamber 1 is condensed and removed by cooling. With the function to do. 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 air blowing section 8 and constitutes a circulation path for sending the gas passing through the condensing means 9 to the air blowing section 8 again.
11 is an air intake provided in this circulation path,
Inhale outside air. This suction is naturally performed by the suction pressure of the fan constituting the blower unit 8 and the negative pressure generated when the vapor is condensed in the condensing means 9.
Similarly, 12 is an air discharge port provided in the circulation path, which naturally discharges the air to the outside by the pressure blown out by the fan forming the blower unit 8 and the expansion pressure of heat generated in the heating unit 5. Reference numeral 13 denotes a deodorizing section, which is composed of a catalyst heating heater 14 and a honeycomb catalyst 15. In this embodiment, the catalyst 15 used is one in which a platinum group metal is supported on activated alumina or the like. The gas discharged from the air outlet 12 is deodorized by the deodorizing unit 13 and discharged to the outside.

The operation of this embodiment will be described below. The user puts the garbage in the garbage container 2 and sets it in the drying chamber 1. This garbage container 2 can be attached to and detached from this device, and the user does not have to carry the garbage to this device, and can put the garbage in this garbage container 2 at the place where the garbage is generated and then set it in this device. Therefore, it is easy to use. In this way, when the user closes the lid 4 and turns on a switch (not shown), a control device (not shown) operates to operate the fan forming the blower section 8, the cooling fan forming the condensing means 9, the heater 6 and the catalyst. The heater 14 for heating is energized. The hot air generated by the air blower 8 and the heating unit 5 enters the drying chamber 1 through the hot air outlet 3 and dries the garbage in the garbage container 2. The waste 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, but if the temperature is too high, the garbage will be easily carbonized. When the kitchen waste is carbonized, it becomes difficult to deodorize due to burning odor and smoke. Also, if plastic bags are mixed in, there is a risk that chlorine-based gas will be generated. Therefore, in this embodiment, the temperature of this hot air is 150 ° C. near the hot air outlet 3.
It is about degree. Also, the larger the flow velocity of hot air, the shorter the drying time, but there is a problem of noise and the like.
litter / sec. Electric power of 600 to 700 W is required to realize such temperature and flow velocity. Further, the garbage in the garbage container 2 can be dried efficiently by fluidizing the garbage by means such as stirring to increase the surface area. However, the present invention does not refer to a method with good drying efficiency.

The gas generated from the garbage in the drying chamber 1 reaches while containing a large amount of steam. In the condensing means 9, the gas is cooled and the vapor is condensed. The condensed water generated at this time is
In the case of 1 kg of kitchen waste (the average amount of raw garbage discharged by a family of four per day, fish, meat, vegetables, fruits, grains, etc. are configured as a certain proportion. In the present embodiment, , 1 kg of kitchen waste is represented as kitchen waste of such a component),
It becomes about 500-700 cm ³ and flows down from the drain hose 10. If the cooling method is a water cooling method instead of an air cooling method, the water piping system will be mechanically complicated, but the water cooling method has a higher cooling efficiency and the condensed water generated when condensed is used for cooling. It is easy to use because it can be discharged together with the cooling water.

The thus dried and condensed water is circulated to the air blowing section 8 and the heating section 5 at a temperature of about 50 ° C., and becomes hot air to dry the garbage again. In this case, in this embodiment, the blower unit 8 is installed on the downstream side of the condensing means 9 and on the upstream side of the heating unit 5. In this way, the temperature of the blower unit 8 is set to the lowest temperature in this circulation path, and the fan forming the blower unit 8 is at the position where it is least affected by the temperature. When dried by such a circulating hot air drying method, the kitchen waste is dried in about 3 to 4 hours.

In the drying step, odorous components are removed from the garbage.
Occur. This odor component can be deodorized by catalytic oxidation.
And are most preferred. Because the odor component generated from kitchen waste
Is mostly organic matter, and organic matter is simply oxidized to water.
Will it be decomposed into carbon dioxide and turn into an odorless and harmless gas?
It is. This odor is converted to methane with 1 kg of garbage and total
The amount is 6-8litter, but oxygen is needed to oxidize it.
12 to 16 litter, and about 100 litter in air is required.
It is important. Therefore, in this embodiment, the auxiliary combustion air is treated.
In order to replenish within 3 to 4 hours
A slot 11 is provided. In this embodiment, this air intake
The inlet 11 is on the upstream side of the blower unit 8, that is, the fan sucks in.
Side, downstream of the condensing means 9. Thus this place
Taking in the outside air naturally by utilizing the negative pressure in the place
Is what you are doing. In this case, the blower unit 8 is configured
Use a pressure type turbo fan as a fan
Since negative pressure is likely to occur, it can be said to be an effective means. Also, this
The size of the hole of the air intake 11 is important in this embodiment.
Then, let the air speed of the blower unit 8 be 5 litter / sec.
The inner diameter of the pipe that pierces the outlet 11 is set to 36 mm, and air is taken in.
The diameter of the hole 11 is 3 mm. Incorporated under this condition
The amount of air taken is 105litter (1cm in 3 hours. ³/ Sec.)
Therefore, the required amount of air could be obtained.

Next, deodorization of odorous components will be described in detail. The gas containing odor in the circulation path is discharged to the deodorizing section 13 outside the circulation path through the air outlet 12.
In this embodiment, the position of the air outlet 12 is upstream of the heating unit 5 and downstream of the drying chamber 1. The reason for this is that, firstly, at this position, the internal pressure of the circulation path at that position is high due to the expansion pressure due to the heat of the heating unit 5 and the pressure blown out by the fan constituting the blower generating unit 8.
This is because the gas can be discharged to the outside without backflow. Secondly, this location has the highest temperature and lowest humidity of the gas in the circulation path. That is, oxidative deodorization is facilitated. Thirdly, the gas concentration in the circulation path at this position is low. That is, since the odorous components are condensed together with the steam by the condensing means 9 and removed to some extent, the odorous concentration is relatively low, and the deodorization is further facilitated. The gas discharged from the air outlet 12 is oxidatively deodorized by the catalyst 15 heated by the catalyst heating heater 14 in the deodorizing unit 13. The flow rate of the gas passing through the catalyst 15 is 1 cm ³ / se in this embodiment.
It is sufficient that the catalyst 15 has a volume of 10 cm ³ . That is, it is possible to deodorize with an extremely small catalyst. If the deodorizing unit 13 is configured to directly deodorize the gas exhausted from the drying chamber 1 (this method is generally used), the flow velocity of hot air is estimated to be 1 litter / sec.
Even if it is smaller than this, the drying time remarkably increases, but the volume of the catalyst needs to be 1.5 litter or more. Compared with the volume of the catalyst 15 of this embodiment, the structure of this embodiment can be said to be a very effective means in terms of the cost of the catalyst and the electric power for heating the catalyst. In this embodiment, as the catalyst 15, a platinum group metal supported on activated alumina or the like is used, but the kind of the catalyst is not particularly limited. This catalyst 15
When heated to 00 ° C. and measured THC (total hydrocarbons; which can be said to be an index that approximately represents the concentration of odorous components) in the gas, it was found that the purification rate from before deodorization to after deodorization was 99% or more. did it. There was no problem in sensory evaluation.

When the drying is completed as described above, the temperature sensor (not shown) detects the completion of the drying, and the controller operates to turn off the switch (not shown). After that, the user may open the lid 4 and take out the garbage container 2, and dispose of the dried kitchen waste inside. This dried kitchen waste is about 200 g with respect to the original kitchen waste weight of 1 kg, and since there is no water, spoilage does not proceed. This makes it easy to handle kitchen garbage that was originally uncomfortable.

However, if the dried garbage is left in the device without being discarded, or if the raw garbage before drying is left in the device, a smell is generated from the garbage. In this embodiment, as shown in FIG. 1, an adsorbent 7 is incorporated in the heating section 5 to deodorize the generated odor. In this case, when the fan of the blower unit 8 is operated to forcibly circulate the odor and bring it into contact with the adsorbent 7,
It is possible to deodorize even more effectively. However, in general, the adsorbent has a life. That is, it is not possible to adsorb more odor than the adsorbable capacity. However, in this embodiment, the adsorbent 7 is incorporated in the vicinity of the heater 6 and is heated each time the treatment is performed. The adsorbent 7 desorbs the adsorbed odor when heated and recovers the adsorption capacity. Therefore, according to the configuration of the present embodiment, the life is not extended and it can be used forever. As the adsorbent 7, zeolite and activated carbon are used in this embodiment. In other words, odorous molecules that zeolite easily adsorbs are molecules with small molecular weight and polarity, and odorous molecules that activated carbon easily adsorb are molecules with large molecular weight and no polarity. If these two adsorbents are used in combination, It is possible to adsorb the odorous molecules. However, activated carbon may burn if it is heated at a high temperature, and on the contrary, zeolite does not desorb odor unless it is heated to a high temperature, so activated carbon is placed on the low temperature side and zeolite is placed on the high temperature side during heating. Should do. However, in this example, only the honeycomb-shaped zeolite was used as the adsorbent 7, but as a result of the sensory test of odor,
The odor around the equipment under normal conditions without treatment has almost disappeared.

[0022]

As described above, according to the first means of the present invention, the hot air generating means including the air blowing part for blowing the air for drying the garbage and the heating part for heating the air, and the garbage is dried. A drying chamber and a condensing means for condensing a gas containing vapor generated from the garbage to remove water, the hot air generating means is provided on the downstream side of the condensing means, and the water is removed by the condensing means. It has a circulation path for sending gas to the hot air generating means again, and the circulation path is provided at an air intake for taking in air from the outside, an air discharge for discharging gas to the outside, and a downstream side of the air discharge. Since it has a deodorizing unit for deodorizing the gas in the circulation path,
It can be used as a garbage disposal machine that can be used indoors without generating a rotten odor.

In addition to the structure of the first means of the present invention, the second means of the present invention is such that the hot air generating means has an air blowing section on the upstream side and a heating section on the downstream side, and the air intake port is By disposing it between the air blower and the condensing means and the air outlet between the heating part and the drying chamber, it is possible to realize a kitchen waste treatment machine having a higher deodorizing effect.

According to the third means of the present invention, in addition to the constitution of the first means or the second means of the present invention, the heating part is made of one or two kinds selected from zeolite and activated carbon. As a structure incorporating an adsorbent, it is possible to provide a kitchen waste processing machine capable of deodorizing a particularly constant odor with a simple structure.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a garbage processing machine according to an embodiment of the present invention.

FIG. 2 is a sectional view showing the structure of the deodorizing section.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drying room 2 Waste 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 discharge port 13 Deodorizing part 14 Catalyst heating heater 15 Catalyst

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Hisao Tsunaga 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (3)

[Claims] 1. A hot air generating means comprising a blower for blowing air for drying kitchen waste, a heating unit for heating the air, a drying chamber for drying kitchen waste, and steam generated from the kitchen waste. A condensing means for condensing the gas to remove moisture is provided, the hot air generating means is provided on the downstream side of the condensing means, and a circulation path for sending the gas from which moisture has been removed by the condensing means to the hot air generating means again is provided. The circulation path has an air intake opening for taking in air from the outside, an air exhaust opening for discharging gas to the outside, and a deodorizing section for deodorizing the gas in the circulation path provided on the downstream side of the air exhaust opening. The kitchen garbage processing machine which has. 2. The hot air generating means has an air blowing section on the upstream side and a heating section on the downstream side, an air intake is arranged between the air blowing section and the condensing means, and an air outlet is the heating section. The kitchen waste disposal machine according to claim 1, which is arranged between the drying room and the drying room. 3. The kitchen garbage processor according to claim 1 or 2, wherein an adsorbent composed of one or two selected from zeolite and activated carbon is incorporated in the heating part.