JP2003285026A - Drain water treatment method in garbage disposal machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a drain water treatment method in a garbage disposal machine capable of automatically bringing steam to a harmless state to exclude the same without performing the adjustment of pH or BOD by manual work when steam recovered from a treatment tank is treated, dispensing with a separate special apparatus for the exclusion of steam and effectively utilizing energy discharged as it is heretofore by utilizing waste heat from the catalytic deodorizing machine provided to the garbage disposal machine. <P>SOLUTION: The garbage disposal machine is constituted so that a rotary shaft 1 rotated by a drive means is provided in the treatment tank 3, rod-shaped paddles 2 are radially protruded from the rotary shaft 1 centering around the rotary shaft 1, garbage is stirred by the paddles 2, the treatment tank 3 is internally heated to decompose garbage and the moisture discharged from garbage is condensed by a condenser 6 to generate drain water. This drain water is forcibly evaporated to be discharged to the atmosphere. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drain water treatment method in a food waste disposer that decomposes food waste by utilizing the power of microorganisms.

[0002]

2. Description of the Related Art Generally, most of the food waste discharged outside the home is produced from kitchens such as restaurants, restaurants, restaurants, and school lunches, but these are incinerated or disposed of in public facilities. It was disposed of, but due to environmental protection and processing space problems, the processing cost has risen year by year,
Simple outsourcing has become difficult, and as a result, it is required to dispose of it at the garbage source.

[0003] Then, there is known a food waste disposer utilizing the disintegration action of food waste by microorganisms. This food waste disposer removes water and increases air supply to activate aerobic bacteria. In order to promote the above, it is required to provide a stirring means to improve the mixing property of aerobic bacteria and food waste.

Conventionally, as such a garbage processing machine, for example, as shown in FIG. 3, a horizontal drum type processing tank 3 having a U-shaped cross section with a concave bottom and a flat upper surface is provided with a frame 4a and a cover 4b. Is housed in a box-shaped housing 4 composed of, and the rotating shaft 1 is horizontally installed inside the processing tank 3.
There is one in which a paddle 2 as a stirring rod is provided in a projecting manner on the rotating shaft 1, a discharge port 5 is provided at the center of the side of the processing tank 3, and a dust inlet 21 is formed at the center of the upper surface. Reference numeral 5a in the drawing denotes an opening / closing door of the discharge port 5 formed in the housing 4.

A motor 8 is connected to one end of the rotary shaft 1 via a speed reducer 7 as a gear as a driving means for rotation. The speed reducer 7 and the motor 8 are provided in a space inside the housing 4 outside the processing tank 3.

Further, the motor 8 is a motor capable of rotating in the forward and reverse directions, whereby the rotary shaft 1 can repeat the forward and backward rotational drive.

A rod-shaped paddle 2 is attached to the rotary shaft 1
The paddles 2 are arranged so as to line up spirally and are provided on the rotary shaft. Further, the paddle 2 is provided on the rotary shaft 1 symmetrically with respect to the discharge port provided facing the central portion of the rotary shaft 1.

In the illustrated example, all the rod-shaped paddles 2 have the same length, and they are provided in a pair so as to be linearly aligned with each other with respect to the rotary shaft 1. There are two or more.

Then, the pair of adjacent paddles 2 are arranged in a spiral shape by making the angles differ by 30 ° about the rotation axis 1. By doing so, the pair of paddles 2 at the center of the pair of paddles 2 at the end of the rotary shaft 1 is 90.
The pair of paddles 2 that are twisted, and further three, or six in total, overlap with the pair of paddles 2 at the end of the rotary shaft 1 assuming that they are twisted by 180 °.

Assuming that the pair of paddles 2 located at the center of the six in total is located at the center of the rotary shaft 1, the twisting is reversed, and as a result, the paddles 2 are symmetrically arranged. A pair is provided on the rotating shaft 1. Although illustration is omitted, the paddle 2 may be provided with a branch or a blade.

In the figure, 6 is a condenser arranged on the cover 4b of the housing 4, 18 is a heater arranged at the bottom of the processing tank 3, and an intake pipe 9 connected to the suction side of the condenser 6 is shown.
And an exhaust pipe 10 connected to the discharge side are opened in the processing tank 3.

Then, in order to process the processed material (raw garbage), the opening / closing lid provided at the garbage input port 12 is opened to put the processed material (raw garbage) into the processing tank 3, and the motor 8 is in this state. If the rotating shaft 1 is normally rotated by energizing, the processed material (garbage refuse) is divided into left and right and flows toward the end of the processing tank 3, and then, when reversed, flows so as to gather in the center in reverse. .

As described above, the paddle 2 stirs the processed material (garbage) and the biochip to be added as needed, so that the water of the processed material is splashed, and the area where the bacteria adhere is increased to supply oxygen. Increase and promote the activation of bacteria.

Further, in order to throw in a further processed product (garbage), the processed product is divided into right and left while the rotating shaft 1 is rotated in the normal direction to create a space for the disposal below the refuse input port. You can

When processing this processed product (raw garbage), air is supplied into the processing tank 3 through the exhaust pipe 10 and heated by the heater 18 so that the processed product (raw garbage) in the processing tank 3 is processed. ) Is evaporated to form water vapor, and this water vapor is collected from the intake pipe 9 to the condenser 6, where it is heat-exchanged and condensed to water, and is transferred as drain water to a container such as a bucket and discharged. ing.

Since drain water has a strong odor and contains a large amount of acid, pH adjustment and BOD adjustment are performed by adding various chemicals. Further, as described above, oxygen is supplied into the processing tank 3 through the exhaust pipe 10 and the air inside the processing tank 3 is sucked into the intake pipe 9.
Is collected and exhausted, and this circulation is repeated to supply oxygen into the processing tank 3. However, since the exhaust has an odor, the condenser 6
A catalyst deodorizer 16 is installed in the upper part of the housing 4 adjacent to the above, and the catalyst deodorizer 16 removes the odor in the exhaust gas.

[0017]

When the steam recovered from the processing tank 3 is treated as drain water, it is conventionally discharged as a liquid, but if it remains as it is, it causes environmental pollution. Not only is it necessary to remove but also manual adjustment of pH and BOD is required, which is troublesome.

The object of the present invention is to eliminate the disadvantages of the conventional example and to treat the steam recovered from the processing tank with
There is no need to perform manual work such as adjustment and BOD adjustment, it can be automatically made harmless and discarded, and for that reason, no special device is required. It is an object of the present invention to provide a drain water treatment method for a food waste treatment machine, which can also effectively utilize the energy that was conventionally released as it is by utilizing the exhaust heat of the.

[0019]

In order to achieve the above-mentioned object, the present invention firstly provides a rotary shaft which is rotated by a driving means in a processing tank, and a rod-shaped paddle is centered around the rotary shaft from the rotary shaft. Radially project to the, and stir the garbage with the paddle and heat the inside of the treatment tank to decompose the garbage,
In a food waste treatment machine in which water discharged from food waste is condensed by a condenser into drain water, the drain water is forcibly evaporated and released into the atmosphere.

As a result, when treating drain water,
Since this is not treated as a liquid as it is, but is treated in a gas state, there is no need for the conventional work such as pH adjustment for neutralization, and the treatment is easy.

Secondly, since the drain water that has been forcibly evaporated into water vapor passes through the deodorizer and is made odorless there before being released into the atmosphere, even if it is treated as a gas, it is discharged to the surroundings. It does not give off a bad odor and does not become an environmental problem.

Thirdly, the deodorizer is a catalytic deodorizer that requires a large amount of heat, and the drain water is forcibly evaporated by the high-temperature exhaust heat generated from the catalytic deodorizer. In this way, by using the exhaust heat of the catalytic deodorizer already installed in the food waste disposer to turn liquid drain water into gas, a separate heat source is not required, and conventionally, it is wastefully released to the atmosphere. It is possible to effectively use the waste heat energy.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a vertical sectional front view showing an example of a food waste disposer in which the drain water treatment method of the present invention is carried out, and FIG. 2 is a vertical sectional side view of the same, in which the same components as those of the conventional example shown in FIG. 3 are the same. Reference numeral is attached. Explaining from the structure of the food waste disposer, as described above, a horizontal drum type processing tank 3 having a U-shaped cross section with a concave curved bottom and a flat upper surface is composed of a frame 4a and a cover 4b. It is housed in a box-shaped housing 4 in which a rotary shaft 1 is horizontally installed inside the processing tank 3, and a paddle 2 as a stirring rod is projectingly provided on the rotary shaft 1 (not shown). , The discharge port is provided at the center of the side of the processing tank 3 as in the conventional case,
The dust inlet was formed in the center of the top surface.

A motor 8 is connected to one end of the rotary shaft 1 via a speed reducer 7 using a gear as a driving means for rotation. The speed reducer 7 and the motor 8 are provided in a space inside the housing 4 outside the processing tank 3. The motor 8 is a motor capable of rotating in the forward and reverse directions, whereby the rotary shaft 1 can repeat the rotational drive in the forward and reverse directions.

A rod-shaped paddle 2 is attached to the rotary shaft 1 by the rotary shaft 1.
The paddles 2 are arranged so as to line up spirally and are provided on the rotary shaft. Further, the paddle 2 is provided on the rotary shaft 1 symmetrically with respect to the discharge port provided facing the central portion of the rotary shaft 1.

In the illustrated example, all the rod-shaped paddles 2 have the same length and are provided in a pair so as to be linearly aligned with each other with respect to the rotary shaft 1, and the pair of paddles 2 are spaced from each other on the rotary shaft 1. There are two or more.

Then, the pair of adjacent paddles 2 are arranged in a spiral shape by making the angles differ by 30 ° about the rotation axis 1. By doing so, the pair of paddles 2 at the center of the pair of paddles 2 at the end of the rotary shaft 1 is 90.
The pair of paddles 2 that are twisted, and further three, or six in total, overlap with the pair of paddles 2 at the end of the rotary shaft 1 assuming that they are twisted by 180 °.

Assuming that the pair of paddles 2 located at the center of the six in total is located at the center of the rotary shaft 1, the twisting direction will be reversed, and as a result, the paddles 2 will be symmetrical. A pair is provided on the rotating shaft 1. Although illustration is omitted, the paddle 2 may be provided with a branch or a blade.

In the figure, 6 is a condenser provided on the cover 4b of the housing 4, 18 is a heater provided at the bottom of the processing tank 3, and an intake pipe 9 connected to the suction side of the condenser 6 is shown.
Is opened near one end on the upper side in the treatment tank 3, the exhaust pipe 10 connected to the discharge side is opened near the other end on the upper side in the treatment tank 3, and a blower 11 is provided in the middle of the exhaust pipe 10. To arrange.

In the present invention, in addition to such a constitution, the condenser 6
A catalyst deodorizer 16 for deodorizing exhaust gas and drain water is installed in the upper part of the housing 4 on the discharge side of the condenser 6. The catalyst deodorizer 16 is provided with a heater 19 in a lower portion inside thereof, a catalyst 20 is arranged in an upper portion inside thereof, and an upper end thereof is formed into an opening 16a so as to open to the atmosphere outside the housing 4. The catalyst 20 is a platinum catalyst that requires a high temperature.

The upper part of the housing 4 is located adjacent to the condenser 6 and above the catalyst deodorizer 16, and the evaporation container 12
And an exhaust pipe 14 whose one end is connected to the discharge side of the condenser 6 and whose other end is connected to the inflow side of the evaporation container 12 and whose one end is open to the outflow side of the evaporation container 12. The end is opened at the bottom of the catalytic deodorizer 16. In the figure, 15 is the exhaust pipe 1.
The blower provided in the middle of 4 is shown.

Further, the exhaust pipe 10 connected to the discharge side of the condenser 6 branches in the middle of the housing 4 to join the branch pipe 10a with the exhaust pipe 14 to make the catalyst deodorizer 16
Open at the bottom of.

Next, a method for treating drain water will be described. If the open / close lid provided at the waste input port is opened and the processed material (raw garbage) 17 is put into the processing tank 3, and the rotating shaft 1 is rotated in the normal direction, the processed material is divided into left and right processing tanks. It flows toward the end of 3, and if it is reversed, it flows so that it conversely gathers in the center.

In this way, the processed material (garbage) 1 with the paddle 2
By stirring the biochip and the biochip to be added as necessary, the water of the treated material is splashed, and the adhesion area of bacteria is increased and the supply of oxygen is increased to promote the activation of bacteria. In addition, in order to throw in a further processed material, a space for loading can be created below the dust input port by dividing the processed material into right and left while the rotating shaft 1 is rotated in the forward direction.

On the other hand, when the processed product (garbage) 17 is to be taken out from the discharge port, the discharge port is opened with the rotating shaft 1 reversed, and the processed product is collected in the central portion where the discharge port is located.
It becomes easy to discharge.

When processing the processed material (garbage waste) 17, the blower 11 is operated to move the exhaust pipe 1 into the processing tank 3.
While supplying air at 0, it is heated by the heater 18 to evaporate the water contained in the processed material (garbage) 17 in the processing tank 3 into water vapor, and this water vapor is supplied to the condenser 6 through the intake pipe 9.
Suck it in and heat exchange it to make drain water.

Drain water which is a liquid flows into the evaporation container 12 through the drain water pipe 13. Since the evaporation container 12 is heated by the high-temperature exhaust heat from the catalyst deodorizer 16 disposed below, the drain water in the evaporation container 12 evaporates into steam, which is sucked by the blower 15 and passed through the exhaust pipe 14. Flow into the catalyst deodorizer 16, where it is deodorized and then released into the atmosphere through the opening 16a in the upper part of the catalyst deodorizer 16.

In this case, the catalyst deodorizer 16 uses, as the catalyst 20, for example, a platinum catalyst which needs to be heated by the heater 19 at a high temperature of 300 ° C. Therefore, the amount of heat required to evaporate the drain water is You can secure enough.

On the other hand, the water vapor which has been sucked into the condenser 6 and which has not been condensed even after heat exchange is sucked by the blower 11 and enters the exhaust pipe 10, from which part of the water vapor re-enters the treatment tank 3. Further, a part of the gas enters the catalyst deodorizer 16 from the branch pipe 10a.

In this way, the water contained in the processed material (raw garbage) 17 in the processing tank 3 is heated by the heater 18 to form steam, which is heat-exchanged in the condenser 6 to form drain water, The drain water is evaporated using the exhaust heat from the catalytic deodorizer 16 to form steam, which is then deodorized by the catalytic deodorizer 16 and released into the atmosphere.

[0041]

As described above, according to the drain water treatment method for the food waste treating machine of the present invention, firstly, the rotary shaft which is rotated by the driving means is provided in the treatment tank, and the rod-shaped paddle is provided from the rotary shaft. Radially projecting around the rotating shaft, the paddle is agitated and the inside of the processing tank is heated to decompose the food waste, and the water discharged from the food waste is condensed by a condenser and drained. In a food waste processor that uses water, the drain water is forcibly evaporated and released into the atmosphere.

As a result, when treating drain water,
Since this is not treated as a liquid but is treated as a gas, it is not necessary to add chemicals to adjust pH and neutralize as in the conventional case, and it can be released as it is. It can be processed.

Secondly, since the drain water that has been forcibly vaporized into water vapor passes through the deodorizer and is made odorless there before being released into the atmosphere, even when it is treated as a gas, it is discharged to the surroundings. It does not give off a bad odor and does not become an environmental problem.

Thirdly, the deodorizer is a catalytic deodorizer that requires a large amount of heat, and the drain water is forcibly evaporated by the high-temperature exhaust heat generated from the catalytic deodorizer. In this way, by using the exhaust heat of the catalytic deodorizer that is already installed in the food waste disposer to turn liquid drain water into a gas, the heat quantity required for evaporation can be secured without the need for a separate heat source. It is also possible to effectively use the waste heat energy that wasted in the atmosphere.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view of a food waste disposer in which a drain water treatment method for a food waste disposer of the present invention is implemented.

FIG. 2 is a vertical cross-sectional side view of a food waste disposer in which the drain water treatment method for the food waste disposer of the present invention is implemented.

FIG. 3 is a vertical sectional front view of a food waste disposer in which a conventional drain water treatment method is carried out.

[Explanation of symbols]

1 ... Rotating shaft 2 ... Paddle 3 ... Processing tank 4 ... Housing 4a ... Frame 4b ... Cover 5 ... Discharge port 5a ... Opening door 6 ... Condenser 7 ... Reducer 8 ... Motor 9 ... Intake pipe 10 ... Exhaust pipe 10a ... Branch Pipe 11 ... Blower 12 ... Evaporation container 13 ... Drain water pipe 14 ... Exhaust pipe 15 ... Blower 16 ... Catalyst deodorizer 16a ... Opening 17 ... Treated product (garbage) 18 ... Heater 19 ... Heater 20 ... Catalyst 21 ... Garbage inlet

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Takashi Yamaguchi             1-1 1-1 Yamate, Funabashi City, Chiba Prefecture             Inside the Iron Co., Ltd. (72) Inventor Katsumi Yoshida             1-1 1-1 Yamate, Funabashi City, Chiba Prefecture             Inside the Iron Co., Ltd. F-term (reference) 4D004 AA03 CA13 CA19 CA22 CA42                       CA48 CB04 CB28 CB32 CC09                 4D034 AA26 CA12 DA02                 4D048 AA22 BA30X CC38 CC53                       CD10 DA01 DA13                 4G037 CA11 EA03                 4G078 AA11 AB20 BA01 DA03 EA03                       EA20

Claims (3)

[Claims] 1. A rotating shaft which is rotated by a drive means is provided in the processing tank, and rod-shaped paddles are radially projected from the rotating shaft about the rotating shaft, and the paddle stirs the food waste and the processing tank. In a food waste treatment machine that heats the inside to decompose the food waste and condenses the water discharged from the food waste with a condenser into drain water, forcibly evaporating the drain water and discharging it into the atmosphere. A method for treating drain water in a food waste treatment machine characterized by the above. 2. A drain water treatment method in a food waste treatment machine, characterized in that the drain water that has been forcibly vaporized into water vapor passes through a deodorizer and is made odorless there before being released into the atmosphere. 3. The deodorizer is a catalytic deodorizer that requires a large amount of heat, and drain water is forcibly evaporated by the high-temperature exhaust heat generated from the catalytic deodorizer. The method for treating drain water in the garbage treatment machine according to 1.