JP2003340495A - Underwater decomposition type garbage treatment apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an underwater decomposition type garbage treatment apparatus wherein over flow is surely prevented by precisely detecting the filling-up of decomposition liquid. <P>SOLUTION: In the underwater decomposition type garbage treatment apparatus wherein garbage charged into a garbage charging apparatus 1 is crushed, introduced into a decomposition vessel 2 and decomposed by microorganisms in the decomposition liquid stored in the decomposition vessel 2, a water supply means 5 for supplying water to the decomposition liquid based on the detected result from a sensor 6 detecting the liquid surface level of the decomposition liquid is provided in the decomposition vessel 2, a proximity sensor 71 for detecting the filling-up when there is the fear of the overflow of the decomposition liquid is provided, and the water supply by the water supply means 5 is stopped based on the detection of the filling-up by the proximity sensor 71. The detection surface of the proximity sensor 71 is cleaned by a cleaning means. The cleaning means is so constituted that a part of the water to be supplied is jetted to the detection surface when water by the water supplying means 5 is supplied. A water supply valve 52 and an emergency valve 53 are arranged in series in the water supply means. <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 an underwater decomposition type food waste processing apparatus for processing food waste by microorganisms of a decomposition liquid stored in a decomposition tank.

[0002]

2. Description of the Related Art Conventionally, so-called underwater decomposition type garbage treatment, in which garbage is put into a garbage throwing device, crushed and then introduced into a decomposition tank, and the garbage is decomposed by microorganisms of the decomposition liquid in this decomposition tank. A device is provided.

Specifically, the level sensor provided in the decomposition tank detects the liquid level of the decomposition liquid, and based on this detection, the water supply valve of the water supply means is controlled to open and close to control the amount of decomposition liquid in the decomposition tank. The food waste is decomposed by the decomposition liquid while adjusting the.

Further, when the level of the decomposed liquid reaches the full level, the level sensor detects this, and based on this, the water supply valve is closed to stop the water supply, thereby preventing the overflow of the decomposed liquid. ing.

[0005]

By the way, in the aforementioned decomposition tank, in order to activate the microorganisms of the decomposition liquid, the decomposition liquid is introduced into the upper space in the decomposition tank by a circulation pump,
It is sprayed again on the surface of the decomposition liquid and circulated. Therefore, bubbles may be generated on the surface of the decomposition liquid depending on the internal conditions.

However, with the conventional level sensor that detects the full amount, the liquid level can be accurately detected, but even bubbles on the liquid level cannot be accurately detected, which may cause detection failure. This causes a problem that overflow may occur.

Further, when a failure occurs in which the water supply valve does not close, even if the level sensor detects the full amount of the decomposition liquid, the water supply will be continued without stopping,
As a result, there is also a problem that the decomposition liquid overflows.

The present invention has been made in view of the above problems, and an object of the present invention is to accurately detect the full amount of the decomposition liquid regardless of the generation of bubbles to reliably prevent overflow. An object of the present invention is to provide an underwater decomposition type food waste treatment device capable of reliably preventing an overflow even if a water supply valve fails.

[0009]

According to a first aspect of the present invention, there is provided an underwater decomposition type food waste disposal system, wherein the food waste introduced into a food waste introduction device is crushed by the food waste introduction device and then introduced into a decomposition tank. In the underwater decomposition type garbage treatment device that decomposes the decomposition liquid stored in the decomposition tank by microorganisms, the decomposition tank decomposes based on the detection result from the level sensor that detects the liquid level of the decomposition liquid. A water supply means for supplying water to the liquid is provided, and a proximity sensor for detecting a full amount that may cause the decomposition liquid to overflow is provided, and water supply by the water supply means is stopped based on the detection of the full amount of the proximity sensor. It is composed.

In the underwater disintegration type garbage disposal of the invention according to claim 2, a cleaning means for cleaning the detection surface of the proximity sensor is provided.

In the underwater decomposition type food waste disposal system of the invention according to claim 3, the cleaning means is configured to inject a part of the water supply to the detection surface when the water is supplied by the water supply means.

In the underwater decomposition type food waste disposal apparatus of the invention according to claim 4, the food waste introduced into the food waste introduction device is crushed by the food waste introduction device, then introduced into the decomposition tank, and stored in the decomposition tank. In the underwater decomposition type garbage treatment device for decomposing the decomposed liquid by microorganisms, in the decomposition tank, a water supply means for supplying water to the decomposed liquid based on the detection result from a level sensor for detecting the liquid level of the decomposed liquid. Is provided with a detection device for detecting the full amount of the decomposition liquid may overflow, the water supply means, the water supply valve that opens and closes based on the detection of the level sensor, and the detection of the detection device. An emergency valve that is normally opened and is closed in series is arranged in series.

An underwater decomposition type food waste disposal system according to a fifth aspect of the present invention comprises a food waste introduction device, a decomposition tank, a drying device, and a control device for controlling operation on a base. In the underwater decomposition type food waste processing device, in which the input food waste is crushed by the food waste input device, then introduced into the decomposition tank, and decomposed by the microorganisms of the decomposition liquid stored in the decomposition tank, the decomposition tank and the drying device. And the garbage throwing device and the control device are placed on one side of these, while the opening / closing door of the control device is an upper door that can be opened and closed horizontally above the garbage throwing device. , A lower door that is detachably provided at a position facing the height of the food waste throwing device.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a schematic structure of an underwater decomposition type food waste processing apparatus of the present invention.

In FIG. 1, reference numeral 1 denotes a raw garbage throwing device, which comprises a hopper 11 for throwing raw garbage and a disposer 12 for crushing the thrown raw garbage, and the raw garbage crushed by the disposer 12 is provided. Is introduced into the decomposition tank 2 through the introduction pipe 13.

The decomposition tank 2 decomposes food waste, and stores a decomposition liquid containing microorganisms for processing the food waste.

The decomposition tank 2 is provided with a stirrer 3, a circulation pump 4 and a diffusion member 45.

The stirrer 3 is rotatably provided with a stirring blade 33 provided on a rotary shaft 32 by a rotational drive of a motor 31, and the decomposition liquid stored in the decomposition tank 2 is moved downward by the rotation of the stirring blade 33. A flow to be introduced is generated, and this flow is agitated so that the entire decomposition liquid becomes homogeneous.

The circulation pump 4 is arranged at the bottom of the decomposition tank 2 for sucking the decomposition liquid in the decomposition tank 2 and supplying it to the diffusion member 45, and a supply pipe on the discharge port side thereof. One end of 41 is connected. The supply port 41a, which is the other end of the supply pipe 41, is arranged above the diffusion member 45, and the decomposition liquid is supplied from the supply port 41a to the decomposition member 45.
To spray.

The diffusing member 45 is for diffusing the decomposition liquid injected from the supply port 41a in the upper space, and by this diffusion, oxygen is supplied into the decomposition liquid to activate the activity of microorganisms. ing. That is, food waste is decomposed by aerobic microorganisms.

Then, the downward water flow generated by the stirrer 3 and the water flow generated by the suction of the circulation pump 4 generate a circulation flow in the decomposition liquid in the decomposition tank 2 and decompose it to the liquid surface from the supply port 41a. Together with the supply of the liquid, the entire decomposition liquid is sufficiently stirred to homogenize it. As a result, the decomposition treatment of the decomposition liquid by the microorganism can be efficiently performed in a good state.

On the other hand, in the supply pipe 41, a return pipe 42 is branched and connected from an intermediate portion thereof, and a part of the decomposed solution is partially opened by opening / closing a valve 43 provided in the return pipe 42 through the return pipe 42. The food is thrown back to the garbage throwing device 1.

That is, the decomposition liquid is returned to the garbage disposal device 1 through the return pipe 42 and introduced into the decomposition tank 2, so that the garbage that is thrown into the garbage disposal device 1 and crushed is introduced together with the decomposition liquid. It is introduced into the decomposition tank 2 through 13.

Further, the decomposition tank 2 is provided with a water supply means 5 for supplying water such as tap water into the decomposition tank 2. The water supply means 5 is provided with a water supply pipe 51 connected to a water supply source (water supply or the like) not shown, and a pipe end of the water supply pipe 51 is communicated with an upper space in the decomposition tank 2. The water supply pipe 51 is provided with two open / close valves, a water supply valve 52 and an emergency valve 53, in series.

The water supply valve 52 is controlled to open and close based on the detection of the liquid level height of the decomposition liquid by the level sensor 6 provided in the decomposition tank 2 by the control device 8 described later, and adjusts the water supply into the decomposition tank 2. I am trying to do it.

The emergency valve 53 is normally held in an open state, and is controlled to be closed by a control device 8 described later based on the full amount detection by a full amount detection device 7 provided in the decomposition tank 2, Water supply to the decomposition tank 2 is stopped.

The level sensor 6 detects the liquid level of the decomposition liquid in the decomposition tank 2, and has a level L1 for stopping water supply to the decomposition liquid, a level L2 for supplying water to the decomposition liquid, and a circulation pump. Three levels, that is, the level L3 at which the driving of No. 4 is stopped and the level L3 are detected.

The full amount detecting device 7 is provided with a proximity sensor 71 as shown in FIG. 2, and the proximity sensor 71 is provided on a cylindrical main body 72. The main body 72 is horizontally connected to the upper end of the peripheral surface of the decomposition tank 2, and the inside thereof is communicated with the inside of the decomposition tank 2.

The proximity sensor 71 is horizontally arranged on one side of the peripheral surface of the main body 72 so that its detection surface 71a faces the inside of the main body 72. That is, the position where the main body 72 is arranged is the position where the full amount of the decomposition liquid is detected, and when the decomposition liquid becomes full and enters the main body 72, the proximity sensor 71
Since the detection surface 71a of (1) is shielded by this decomposition liquid, it can be detected that the decomposition liquid is full.

The respective detection signals detected by the level sensor 6 and the proximity sensor 71 described above are input to the control device 8 as shown in FIG. 3, and the control device 8 supplies the water supply valve 52 and the water supply valve 52 based on these detection signals. The opening / closing control of the emergency valve 53 is performed. In addition to the above-described opening / closing control of the water supply valve 52 and the emergency valve 53, the control device 8 performs each control necessary for the operation of the disassembling process, such as the drive control of the circulation pump 4 and the opening / closing control of the valve 43.

On the other side of the peripheral surface of the main body 72, a cleaning nozzle 91 is provided facing the detection surface 71a of the proximity sensor 71. The cleaning nozzle 91 is provided so that its tip injection portion 91 a faces the inside of the main body 72, and a cleaning pipe 92 branched from the water supply pipe 51 is connected to the cleaning nozzle 91. The cleaning pipe 92 is branched from the downstream side of the emergency valve 53, and a part of the water is supplied from the cleaning nozzle 91 to the detection surface 71 a through the cleaning pipe 92 together with the water supply to the decomposition liquid by the water supply means 5. By ejecting, the detection surface 71a is cleaned. That is, the cleaning nozzle 91 and the cleaning pipe 92 constitute the cleaning means 9 using the water supply means 5.

Further, a drying device 10 (see FIG. 4) is connected to the decomposition tank 2. This drying device 10 is for periodically extracting and drying the residue and the like contained in the decomposition liquid of the decomposition tank 2, and by extracting a predetermined amount to the drying device 10 through a drawing tube by a quantitative drawing device (not shown), The salt concentration of the decomposition solution is adjusted.

The hot air that has contributed to the drying in the drying device 10 is introduced into the upper space of the decomposition tank 2 through a hot air pipe by a blower (not shown). This hot air is
It is used to maintain an appropriate temperature of about 40 ° C. at which the decomposition solution is activated, and in addition to the hot air, the decomposition heat of microorganisms and the driving heat of the circulation pump 4 also contribute to maintaining the temperature of the decomposition solution. .

Next, the processing of food waste by the underwater decomposition type food waste processing device thus constructed will be described.

First, the garbage generated in the kitchen or the like is put into the hopper 11 of the garbage throwing apparatus 1 and crushed by the disposer 12. The crushed food waste is introduced into the decomposition tank 2 through the introduction pipe 13 together with the decomposition liquid which is introduced into the garbage disposal 1 by the circulation pump 4 through the supply pipe 41 and the return pipe 42.

In the decomposition tank 2, the introduced garbage is decomposed by the microorganisms in the decomposition liquid. At this time, the circulation pump 4
The decomposition liquid is introduced into the supply port 41a through the supply pipe 41 and is sprayed from the supply port 41a to the diffusion member 45 to supply oxygen to the decomposition liquid and supply the hot air from the drying device to the decomposition liquid at an appropriate temperature. Hold on. In addition, the stirring action of the stirrer 3 and the suction action of the decomposing liquid by the circulation pump 4 generate a circulating flow in the decomposing liquid so that the decomposing liquid is sufficiently agitated to be homogeneous. Therefore, due to these effects, the decomposition liquid is in a state in which the activity of the microorganism is activated, and the decomposition treatment of food waste can be efficiently performed.

On the other hand, in the drying device, the decomposing liquid residue or the like is extracted by the quantitative extracting device according to the amount of food waste put in the decomposition tank 2, and the residue or the like dried by the drying device is discharged to the outside from the discharge port. Is discharged.

At this time, in the control device 8, if the water level of the decomposed liquid is lowered due to withdrawal of the decomposed liquid or the like, the water supply means 5 supplies a predetermined amount of water to adjust the water level of the decomposed liquid. Specifically, when the water level of the decomposed liquid reaches the level L2, this detection signal is output from the level sensor 6 to the control device 8, and the water supply valve 52 is opened by the operation signal from the control device 8 to supply the water, and Raise the liquid level. Then, when the liquid level reaches the level L1, the detection signal is output from the level sensor 6 to the control device 8, and the water supply valve 52 is closed by the operation signal from the control device 8 to stop the water supply.
That is, the liquid level of the decomposed liquid is controlled by the controller 8 through the water supply means 5 so as to be between the levels L1 and L2 in the normal operation.

When the liquid level of the decomposed liquid abnormally drops to level 3 for some reason, this detection signal is output from the level sensor 6 to the control device 8, and the circulating pump is activated by the operation signal from the control device 8. The operation of the circulation pump 4 is stopped so as to prevent the circulation pump 4 from being burned due to idle rotation of the circulation pump 4.

Furthermore, when the liquid level of the decomposition liquid rises abnormally and reaches the full volume due to a malfunction of the water supply valve 52, etc., the detection surface 71a of the proximity sensor 71 is shielded by this decomposition liquid, so the proximity sensor 71 concerned. Detects this and this detection signal is output to the control device 8. As a result, the control device 8
Then, the operation signal is output to the emergency valve 53 to close the emergency valve 53 and stop the water supply by the water supply means 5.
Therefore, even if the water supply valve 52 is out of order, overflow of the decomposition liquid can be reliably prevented.

By the way, the proximity sensor 71 for detecting the full amount of the above-mentioned decomposed liquid ensures this situation by blocking the detection surface 71a even if a bubble is generated on the liquid surface. This can be detected, and as described above, the water supply valve 52 can be closed by the control device 8 to stop the water supply. As a result, it is possible to reliably prevent an accident in which a bubble cannot be detected as in the conventional level sensor and an overflow is caused by the bubble.

The detection surface 71a of the proximity sensor 71 is
Every time water is supplied by the water supply means 5, water is sprayed from the cleaning nozzle 91 through the cleaning pipe 92 to be cleaned, and thus it is possible to prevent the detection accuracy from being deteriorated due to dirt on the detection surface 71a. The control based on the detection of 71 can be reliably performed.

The order of arranging the water supply valve 52 and the emergency valve 53 in the water supply pipe 51 may be opposite to that of this embodiment.

Further, in the present embodiment, the water supply valve 52
When the liquid level of the decomposed liquid rises abnormally and reaches the full volume due to a failure of the above, the proximity sensor 71 detects it.
The proximity sensor 71 is not limited to detect the liquid level at that time.
A general detection device capable of detecting the liquid level may be used.

Further, the cleaning means 9 is not limited to the one that sprays water as in the present embodiment, but may be a wiper or the like.

Subsequently, FIG. 4 and FIG. 5 show a specific layout of the above-mentioned underwater decomposition type food waste processing apparatus.

The underwater decomposition type garbage processing apparatus is mounted on the base A as one unit including the garbage disposal device 1, the decomposition tank 2, the drying device 10, the control device 8 for controlling the operation, and the piping. Has been done.

More specifically, first, the decomposition tank 2 is installed at the right end portion in FIGS. 4 and 5, the drying device 10 is installed adjacently on the left side of the decomposition tank 2, and then the left side of the drying device 10 is controlled. A device 8 and a garbage throwing device 1 are installed.

The control device 8 has a front surface, which is the left side surface in FIGS. 4 and 5, opened and closed by an open door 81.

The opening / closing door 81 is an upper door 8 as shown in FIG.
2 and the lower door 83 are vertically divided. Upper door 82
Is a hinge 82 provided on the right side edge in FIG. 6, for example.
It is provided above the food waste throwing device 1 centering on a so as to be able to open one side. The lower door 83 is the upper door 82.
When the door is opened one-sided as described above, it interferes with the garbage throwing device 1 and cannot be fully opened, so that it is detachable, and is fixed in a closed state by an appropriate fixing tool such as a screw. That is, the upper door 82 and the lower door 83 are
The food waste throwing devices 1 arranged so as to face each other are divided at upper and lower positions where they do not interfere.

On the upper part of the control device 8 provided with the upper door 82, various operation switches and instruments normally used in processing work are arranged, while the control device provided with the lower door 83. At the lower part of 8, there are arranged switches and the like necessary for maintenance work and the like which are not used in normal processing work.

By dividing the opening / closing door 81 of the control device in this way, even if the control device 8 and the garbage throwing device 1 are arranged close to each other as shown in FIGS. 4 and 5, normal processing work is performed. Then, the garbage disposal 1 does not interfere with the operation of the controller 8. This allows the control device 8 and the garbage throwing device 1 to be arranged as close to each other as possible,
The entire device can be made compact.

The disassembling tank 2 and the drying device 10 are arranged in left and right in FIGS. 4 and 5, and the garbage throwing device 1 and the control device 8 are arranged on one side thereof. The same effect as the effect can be obtained.

That is, in the underwater decomposition type food waste processing apparatus equipped with the food waste introduction device 1, the decomposition tank 2, the drying device 10 and the control device 8 for controlling the operation on the base A, the decomposition tank 2 and the drying device. 10 and 10 are arranged adjacent to each other, and the garbage throwing device 1 and the control device 8 are placed on one side of these, while the opening / closing door 81 of the control device 8 can be opened and closed horizontally above the garbage throwing device 1. The upper door 82 and the lower door 83 that is detachably provided at a position facing the height of the garbage throwing apparatus 1 are divided.

[0056]

As described above, according to the underwater decomposition type food waste processing apparatus of the present invention, even if bubbles are generated on the liquid surface of the decomposition liquid, the proximity sensor can reliably detect this situation. It is possible to detect, and it is possible to reliably prevent an accident in which bubbles cannot be detected as in the conventional level sensor and bubbles cannot be detected.

Further, by cleaning the detection surface of the proximity sensor with the cleaning means, it is possible to prevent the detection accuracy from deteriorating due to dirt on the detection surface, and it is possible to reliably perform control based on the detection of the proximity sensor.

Further, by arranging the water supply valve and the emergency valve in series in the water supply means, the water supply by the water supply means can be stopped by the emergency valve even when the water supply valve is broken down, thereby disassembling. It is possible to reliably prevent the occurrence of liquid overflow.

[Brief description of drawings]

FIG. 1 is a diagram showing an overall schematic configuration of an underwater decomposition type food waste processing device of the present invention.

FIG. 2 is a side view showing a full amount detection device and a cleaning unit.

FIG. 3 is a block diagram showing a control system.

FIG. 4 is a side view showing a specific layout of the underwater decomposition type food waste processing device.

FIG. 5 is a plan view showing a specific layout of the underwater decomposition type food waste processing device.

FIG. 6 is a front view showing a configuration of an opening / closing door of the control device.

[Explanation of symbols]

1 Garbage input device 2 Decomposition tank 5 Water supply means 52 Water supply valve 53 Emergency valve 6 level sensor 71 Proximity sensor 71a Detection surface 8 control device 9 Cleaning means

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Claims (5)

[Claims] 1. An underwater decomposition type garbage that decomposes raw garbage thrown into the garbage throwing device by the garbage throwing device and then introduces it into a decomposition tank and decomposes it by microorganisms of the decomposition liquid stored in the decomposition tank. In the processing device, the decomposition tank is provided with a water supply means for supplying water to the decomposition liquid based on a detection result from a level sensor that detects the liquid level of the decomposition liquid, and the decomposition liquid may overflow. Proximity sensor to detect full capacity is provided,
An underwater disintegration type garbage treatment device, characterized in that the water supply by the water supply means is stopped on the basis of full detection of the proximity sensor. 2. The underwater decomposition type food waste processing device according to claim 1, further comprising cleaning means for cleaning the detection surface of the proximity sensor. 3. The underwater decomposition type food waste disposing apparatus according to claim 2, wherein the cleaning means is configured to inject a part of the water supply onto the detection surface when water is supplied by the water supply means. 4. An underwater decomposition type garbage that decomposes the garbage thrown into the garbage throwing device by the garbage throwing device and then introduces it into a decomposition tank and decomposes it by microorganisms of the decomposition liquid stored in the decomposition tank. In the processing device, the decomposition tank is provided with a water supply means for supplying water to the decomposition liquid based on a detection result from a level sensor that detects the liquid level of the decomposition liquid, and the decomposition liquid may overflow. A detection device for detecting the full amount is provided, and in the water supply means, a water supply valve that opens and closes based on the detection of the level sensor and a normally opened emergency valve that closes based on the detection of the detection device are connected in series. Underwater decomposition type garbage treatment device characterized by being arranged. 5. A raw garbage throwing device, a decomposition tank, a drying device, and a control device for controlling operation are provided on a base, and the raw garbage thrown into the raw garbage throwing device is crushed by the raw garbage throwing device. In the underwater decomposition type garbage treatment device to be introduced into the decomposition tank later and decomposed by the microorganisms of the decomposition liquid stored in the decomposition tank, the decomposition tank and the drying device are arranged adjacent to each other, and on one side of these. The garbage throwing device and the control device are arranged, while the opening / closing door of the control device is horizontally opened above the garbage throwing device and removed at a position facing the height of the garbage throwing device. An underwater decomposition type garbage disposal device, characterized by being divided into a freely installed lower door.