JP2001269647A - Organic waste treating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an organic waste treating device capable of exchanging the organic waste between agitation tanks and capable of more improving the efficiency of mixing agitation by forming an agitation tank into double tanks to keep the circumferential speed of an agitation blade within a suitable range, and making adjacent agitation tanks and the rotation area of the agitation blade overlap at a part. SOLUTION: Plural agitation tanks 1 for storing contents and plural agitation mechanisms 2 for rotating the agitation blade provided projectingly at a rotary shaft disposed at the agitation tanks 1 are arranged side by side, and respective agitation tanks 1 are communicatedly formed so that the adjacent agitation tanks 1 and the rotation area of agitating blades 22 may be duplicated at a part, and also the adjacent agitation mechanisms 2 are formed so as to rotate reversely.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to food waste-related industries, processing plants for agriculture, forestry and marine products, and household waste discharged from general households.
The present invention relates to an apparatus for treating organic waste such as vegetable waste (hereinafter, simply referred to as “organic waste”), and more particularly, to organic waste that ferments organic waste and converts it into organic fertilizer. Of the processing device.

[0002]

2. Description of the Related Art Conventionally, most of organic wastes discharged from food-related industries, processing plants for agriculture, forestry and fishery products, general households and the like are treated by incineration or landfill. by the way,
Organic waste is perishable, unsanitary, emits offensive odor, causes harmful insects and harmful animals, and is limited in its ability to treat organic waste by incineration and landfill. Therefore, there is a demand for the development of an apparatus capable of sanitarily treating organic waste.

[0003] In response to this demand, in recent years, a large number of organic waste treatment apparatuses for fermenting organic waste and converting it to organic fertilizer have been proposed. Has been proposed.

[0004] This organic waste treatment apparatus includes a stirring mechanism for stirring the organic waste housed in a cylindrical stirring tank, and a hot air supply mechanism for heating the organic waste. The stirring mechanism is constituted by projecting flat stirring blades formed with the front part inclined downward on the vertical rotation axis, and the hot air supply mechanism is provided with a large number of hot air ejection holes in a row behind the stirring blades. It is constructed by drilling.

[0005] In this organic waste treatment apparatus, an organic waste containing a large amount of water to which an appropriate amount of fermentation bacteria has been added is contained in a stirring tank, and the hot air supply mechanism is stirred while being stirred by a stirring mechanism. To supply hot air and heat. At this time, the organic waste housed in the stirring tank is lifted at the same time as the stirring by the inclined flat stirring blades, and is further uniformly heated by the hot air from the hot air jet holes at the back of the stirring blades. In this way, the organic waste undergoes appropriate mixing and agitation, thereby evaporating the contained water, and is converted into an organic fertilizer by the fermentation and growth of fermentative bacteria.

[0006]

However, in the conventional organic waste treatment apparatus, when the processing amount is to be increased as required, it is necessary to simply increase the capacity of the stirring tank in proportion to the processing amount. Experiments have shown that the fermentation decomposition treatment becomes incomplete or takes a long time when the size exceeds a certain size.

In order to increase the throughput, the capacity of the stirring tank must be increased, but the effective height and diameter of the stirring tank naturally increase, and the effective diameter of the swirling blade is proportional to it. I do. At this time, assuming that the rotation speed of the stirring shaft required for stirring is constant, the average peripheral speed of the stirring blade is increased by an amount corresponding to the increase in the swirling diameter of the stirring blade. It will be faster.

[0008] If the peripheral speed of the stirring blade is too high, an external force such as excessive shearing or crushing is applied to the microorganisms that decompose the organic waste, and the microorganisms and secreted enzymes are destroyed. For example, there arises a problem that appropriate mixing and stirring are not performed. Further, in order to prevent such destruction of microorganisms and enzymes, if the peripheral speed of the stirring blade is reduced, the rotation speed of the stirring blade is reduced, and the stirring effect is reduced in proportion thereto.

In view of the above-mentioned problems of the conventional organic waste treatment apparatus, the present invention uses a double stirring tank to maintain the peripheral speed of the stirring blades in an appropriate range and to improve the peripheral speed of the adjacent stirring tank. By partially overlapping the rotation area of the stirring blade, it is possible to exchange organic waste between stirring tanks,
An object of the present invention is to provide an organic waste treatment apparatus that can further improve the efficiency of mixing and stirring.

[0010]

In order to achieve the above object, an organic waste treatment apparatus according to the present invention is provided with a stirring tank for containing contents and a rotating shaft disposed in the stirring tank. In an organic waste treatment apparatus provided with a stirring mechanism for rotating a stirring blade and a hot air supply mechanism for heating the contents of the stirring tank, a plurality of the stirring tanks and the stirring mechanism are arranged in parallel, and an adjacent stirring tank is provided. And the rotation area of the stirring blade partially overlap,
Each stirring tank is formed to communicate with each other, and adjacent stirring blades are rotated in opposite directions to each other.

In this organic waste treatment apparatus, a plurality of agitation tanks and agitation mechanisms are provided side by side, so that even if the amount of treatment is to be increased, an increase in the swirl diameter of the agitating blades is suppressed and the peripheral speed is adjusted appropriately. In addition to being able to be held in the range, each stirring tank is formed so as to communicate so that the adjacent stirring tank and the rotation area of the stirring blade partially overlap, and the adjacent stirring blades are rotated counter to each other, so that stirring is performed. The contents can be exchanged between the tanks by means of the stirring blade, whereby the efficiency of mixing and stirring can be greatly improved.

In this case, the rotating shaft is penetrated through the stirring tank having a closed structure, and a sealed cover is formed to cover the penetrating portion and the rotating shaft on the outside of the tank. A suction port for sucking the air inside is formed, and the air sucked from the suction port is heated by the hot air supply mechanism, and can be sent to the stirring tank through the hollow portion of the rotating shaft.

[0013] Thus, by the heat exchange with the taken-in air, cooling of the rotating shaft and preheating of the heating air can be performed, and even if gas leaks from the rotating shaft penetrating portion of the stirring tank, hot air is supplied from the suction port. By sending it to the stirring tank via the supply mechanism, it is possible to prevent outflow to the outside.

Further, a heater unit for heating air sent to the stirring tank is formed in a hot air supply mechanism, the periphery of the heater unit is covered with a closed cover, and an air intake is formed in the closed cover to form the air unit. The air taken in from the intake can be supplied to the heater unit via a flow path formed between the sealing cover and the heater unit.

[0015] Thus, by exchanging heat with the taken-in air, the cooling of the heater unit and the preheating of the heating air can be performed, thereby suppressing the temperature rise around the heater unit and saving energy.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an organic waste treatment apparatus according to the present invention will be described below with reference to the drawings.

1 to 5 show one embodiment of the organic waste treatment apparatus of the present invention. This organic waste treatment apparatus accommodates an agitation tank 1 having an opening (not shown) for inputting an organic waste and discharging an organic fertilizer obtained by treating the organic waste, and the agitation tank 1. A stirring mechanism 2 for stirring the contents, a hot air supply mechanism 3 for supplying hot air to the contents and heating the contents, a deodorizing mechanism 4 for deodorizing the air in the stirring tank 1 and releasing the air into the atmosphere; A control mechanism (not shown) for controlling the driving of the mechanism 2 and the hot air supply mechanism 3 is provided.

The stirring mechanism 2 can stir the contents accommodated in the stirring tank 1 on a hollow rotating shaft 21 vertically disposed at the center of the stirring tank 1 so as to lift the contents. A plurality of plate-like stirring blades 22 each having a tip inclined downward in the direction of travel and projecting therefrom, and rotating the rotation shaft 21 through an appropriate transmission mechanism 24 such as a sprocket and a chain. 23 are arranged. The rotating shaft 21 can be configured to be rotatably supported on both the upper and lower sides of the stirring tank 1, or can be configured to be rotatably supported only on the upper part of the stirring tank 1. Further, as the stirring blades 22, four stirring blades 22 are protruded from the rotating shaft 21 so that the phases of the stirring blades 22 are sequentially shifted from each other by 90 ° from the top, or three stirring blades 22 are disposed adjacent to each other. Agitating blades are 120
It is possible to protrude from the rotating shaft 21 so that the phase is shifted by °.

In this case, in this embodiment, as shown in FIG. 3, a pair of cylindrical stirring tanks 1 and a stirring mechanism 2 are arranged side by side, and the rotation area of the adjacent stirring tank 1 and the stirring blade 22 is adjusted. Each of the stirring tanks 1 is formed so as to communicate with each other so as to partially overlap, and adjacent stirring blades 22 having the same height are rotated in opposite directions to each other. By the way, in this embodiment, the adjacent stirring blades 22 are provided at substantially the same height so that the contents of the stirring tank 1 can be surely evenly distributed in each stirring tank 1 and uniformly mixed and stirred. Are configured to rotate at the same speed with the phase shifted by a predetermined angle.
Need not necessarily be provided at the same height. For example, they may be provided at different heights. In this case, the phase and the rotation speed can be freely set, and the contents accommodated in the stirring tank 1 can be used. Hot air can be supplied to objects at different height positions. Further, as shown in the figure, the stirring tank 1 which partially communicates and overlaps has a shape in which two cylinders are partially overlapped, and the two stirring tanks 1 communicate with each other at the overlapping portion C. At the same time, the stirring blade 2 of each stirring tank 1 is
The stirring by 2 is performed in common.

The mixing and stirring at the overlapping portion C will be described.
As shown in FIG. 3, if the contents of the tank A, which has progressed while receiving the behavior due to the rotation of the stirring blade 22 of the tank A, reach the overlapping portion C, the edge portion 5 at the tip of the overlapping portion C
Approximately 50% each is distributed to the A tank and the B tank. In addition, the contents stirred in the tank B are similarly affected. In this way, the contents transferred by the stirring blades 22 in each of the stirring tanks A and B are distributed to each of the stirring tanks A and B at a rate of about 1/2 for each rotation of the stirring blades 22. Due to the effect of this repetition, the mixing and stirring efficiency is significantly higher than that of a conventional single tank.

In this embodiment, since the stirring tank 1 is formed as a double tank, the effective capacity thereof is almost twice as large as that of a single tank. In comparison with a single tank having the same capacity, when the height of the stirring tank is constant, in this embodiment, the swirling diameter of the stirring blade can be reduced to about 77%. As a result of reducing the swirling diameter of the stirring blade, the peripheral speed of the stirring blade can be reduced, whereby the efficiency of extracellular enzyme degradation by microorganisms is increased and the processing capacity is improved. It is also a great advantage that the input height for supplying organic waste to the stirring tank can be kept low as compared with a single tank having the same capacity.

On the other hand, the hot air supply mechanism 3 has two systems,
The high-pressure air generated by the blower 31 is heated by the heater unit 32, and the pipeline 33 and the rotary joint 3 are heated.
4 and a hollow portion 21 a formed in the rotating shaft 21,
Hot air blow-out tube 35 disposed horizontally behind stirring blade 22
The hot blast holes 35a formed in a row in the
It is configured such that hot air can be supplied to the contents accommodated therein. By forming the hot air jet holes 35a of the hot air jet pipe 35 on the back of the stirring blade 22, the hot air jet holes 35a can be prevented from being clogged. The hot-air jet pipe 35 may be provided on all of the stirring blades 22, but the hot-air jet pipe 35 may be omitted from the stirring blade 22 provided above the rotating shaft 21.

In this case, in the present embodiment, as shown in FIG. 4, a sealing cover 6 for covering the through portion of the rotating shaft 21 of each stirring tank 1 and the rotating shaft 21 on the outside of the tank is formed. 6, an air inlet 61 for taking in outside air and a suction port 62 for sucking air inside the cover are formed. The air sucked from the suction port 62 is heated by the hot air supply mechanism 3, and the hollow portion of the rotating shaft 21 is formed. It is sent to each stirring tank 1 via 21a.

That is, in this embodiment, the stirring tank top plate 12
Shaft seal portion 13, rotating shaft 21, and support bearing 1
The bearing box 60 sealed so as to cover
It is formed as a closed cover 6, and the suction port 62 of the blower 31 is connected to the lower part of the bearing box 60 so that the air flow of the intake air from the air inlet 61 passes through the inside of the bearing box 60. The air flow on the intake side of the blower 31 guides the air purified by the air filter to the bearing box 60. This atmosphere constantly cools the bearing 14 and suppresses the temperature rise. further,
Even if odor gas leaks from the shaft seal portion 13 due to a poor shaft seal, the intake air flows through the heater unit 32 and finally the hot air jet holes 35 of the stirring blade 22.
From a, it reaches each stirring tank 1 and does not flow out. At this time, the air supply path inside the bearing box 60 may be located in a part of the flow path on the discharge side of the blower 31,
Since the air flow on the discharge side has a pressure, it is disadvantageous in that the pressure resistance of the bearing box 60 and the bearing and shaft seal must be considered.

In this embodiment, as shown in FIG.
The periphery of the heater unit 32 is covered with the hermetic cover 7, and an air intake 71 is formed in the hermetic cover 7,
The air taken in through the air inlet 71 is
The heater unit 7 is supplied to the heater unit 7 via a flow path 72 formed between the heater unit 32 and the heater unit 32.

That is, as shown in FIG. 1, the existing heater units 32 are formed so that the channels 72 are formed on all surfaces in an outer box 70 having sufficient vertical, horizontal and height dimensions. To be stored. Then, a part of the air supply path of the blower 31 is introduced between the heater unit 32 and the outer box 70 and, after passing through the flow path 72, is supplied to the heater unit 7 via the duct 73. Has become. As a result, the heater unit 32 can achieve the heat insulation effect by the existing heat insulating material 32a, the heat insulation of the air by the air supply of the flow path 72, and the heat insulation effect in double. As described above, by preventing the heat from being dissipated to the outside of the heater unit 32, it is possible to prevent an increase in the ambient temperature inside the processing apparatus, and to eliminate the adverse effects on the weak electric parts of the control electric system and the ozone generator of the ozone deodorizing apparatus. be able to. In addition, since the heat radiation from the heater unit 32 can be recovered, the thermal efficiency is improved as a result. This is because all the flow paths 72 are configured as a closed circuit, and the radiant heat generated by the heater unit 32 is
2 is introduced into the heater unit 32 and finally carried into the stirring tank 1.

On the other hand, the deodorizing mechanism 4 is for deodorizing the air in the stirring tank 1 and releasing it to the atmosphere. The high temperature and high humidity generated when the organic waste is fermented and converted into organic fertilizer. To provide a deodorizing device having a high-performance deodorizing function, such as an ozone deodorizing device, capable of reliably deodorizing a mixed gas having a bad odor such as hydrogen sulfide gas and ammonia gas over a long period of time. Is desirable.

The control mechanism controls the driving of the stirring mechanism 2 and the hot air supply mechanism 3 to enable the automatic operation of the organic waste treatment apparatus. Based on the temperature and humidity detected by a temperature sensor (not shown) for measuring the temperature and a humidity sensor (not shown) for measuring the humidity in the stirring tank 1, the driving of the stirring mechanism 2 and the hot air supply mechanism 3 is controlled. To In this case, the control mechanism can be configured to determine the processing state of the contents contained in the stirring tank 1 based on the humidity detected by the humidity sensor and determine the progress of the processing step. Compared to the case of control by a single time, the process of fermenting organic waste and converting it to organic fertilizer can be performed more efficiently and reliably.

Next, the steps of processing organic waste by the organic waste processing apparatus will be described. First, an organic waste to which an appropriate amount of fermentation bacteria has been added is stored in the stirring tank 1, the stirring mechanism 2 and the hot air supply mechanism 3 are driven, and the contents stored in the stirring tank 1 are premixed for a predetermined time. . In this case, the hot air jet holes 3 of the hot air jet pipe 35 of the hot air supply mechanism 3
The temperature of the hot air supplied from 5a to the contents accommodated in the stirring tank 1 is set to a high temperature of about 150 ° C. to treat various germs. After that, the temperature of the contents stored in the stirring tank 1 is reduced to 4
While maintaining the temperature at about 5 ° C., the stirring mechanism 2 and the hot air supply mechanism 3 are driven to perform the fermentation treatment of the organic waste. The end point of the fermentation step is determined based on the humidity in the stirring tank 1, and when the humidity decreases to 85 to 90%, the process shifts to the aged step. In the agitation step, the hot-air supply mechanism 3 is driven while the stirring mechanism 2 is intermittently driven while the temperature of the contents contained in the stirring tank 1 is maintained at about 45 ° C. The end point of the agglomeration step, that is, the end point of the processing, is determined based on the humidity in the stirring tank 1, and the processing ends when the humidity decreases to 70 to 80%. Through the above steps, the organic waste is transpired from the water contained therein, and is converted into an organic fertilizer by the fermentation and growth of fermentative bacteria. Drain organic fertilizer. In this case, the organic fertilizer in the stirring tank 1 is not entirely discharged, and a part of the organic fertilizer is left in the stirring tank 1 for use as a fermentation bacterium when the organic waste is subsequently processed. The temperature of the contents contained in the stirring tank 1 is 30
The stirring mechanism 2 and the hot air supply mechanism 3 are intermittently driven so as to be maintained at about 45 ° C.

As described above, the organic waste treatment apparatus of the present invention has been described based on the embodiment in which the stirring tank 1 and the stirring mechanism 2 are arranged in a pair, but the present invention has the structure described in the above embodiment. However, the configuration thereof can be appropriately changed without departing from the spirit of the invention, for example, by providing three or more stirring tanks 1 and stirring mechanisms 2 in parallel.

[0031]

According to the apparatus for treating organic waste of the present invention, by providing a plurality of stirring tanks and stirring mechanisms in parallel, it is possible to suppress an increase in the swirling diameter of the stirring blade even when increasing the throughput. In addition, the peripheral speed can be maintained in an appropriate range, and the respective stirring tanks are formed so as to communicate with each other so that the rotation area of the adjacent stirring tank and the stirring blade partially overlaps, and the stirring blades are rotated reversely to each other. This makes it possible to exchange the contents between the stirring tanks by the stirring blades, thereby greatly improving the efficiency of mixing and stirring, and as a result, a process of fermenting organic waste and converting it to organic fertilizer. Can be performed efficiently.

Further, a rotary shaft is penetrated through a stirring tank having a closed structure, and a sealed cover is formed to cover the penetrating portion and the rotary shaft on the outside of the tank.
Forming a suction port for sucking air inside the cover, heating the air sucked from the suction port by the hot air supply mechanism,
By sending heat to the stirring tank through the hollow part of the rotating shaft, heat exchange with the air taken in allows cooling of the rotating shaft and preheating of the heating air, and gas leakage from the rotating shaft penetration of the stirring tank. Even if it occurs, it can be prevented from flowing out to the outside by sending it from the suction port to the stirring tank via the hot air supply mechanism.

Further, a heater unit for heating the air sent to the stirring tank is formed in the hot air supply mechanism, the periphery of the heater unit is covered with a closed cover, and an air intake is formed in the closed cover to form the air unit. By supplying the air taken in from the intake to the heater unit through a flow path formed between the airtight cover and the heater unit, heat exchange with the taken-in air allows the cooling of the heater unit and the generation of air for heating. Preheating can be performed, so that temperature rise around the heater unit can be suppressed and energy can be saved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of an organic waste treatment apparatus of the present invention.

FIG. 2 is an exploded perspective view of the embodiment.

3A and 3B show a stirring tank and a stirring blade of the embodiment, wherein FIG. 3A is a plan view and FIG. 3B is a perspective view.

FIG. 4 is a partially cutaway perspective view showing a sealed cover of the rotating shaft of the embodiment.

FIG. 5 is a partially cutaway perspective view showing a sealed cover of the heater unit of the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Stirring tank 2 Stirring mechanism 21 Rotating shaft 21a Hollow part 22 Stirrer blade 3 Hot air supply mechanism 31 Blower 32 Heater unit 35 Hot air jet pipe 35a Hot air jet hole 4 Deodorizing mechanism 5 Edge part 6 Sealing cover of rotary shaft 61 Air intake 62 Suction Mouth 7 Sealing cover of heater unit 71 Air inlet 72 Flow path

Claims (3)

[Claims] A stirrer for accommodating the contents, a stirrer for rotating a stirrer protruding from a rotating shaft provided in the stirrer, and a hot air supply mechanism for heating the contents of the stirrer. In the organic waste treatment apparatus, a plurality of the stirring tank and the stirring mechanism are arranged in parallel, and the stirring tanks are communicated with each other so that the adjacent stirring tank and the rotation region of the stirring blade partially overlap. An organic waste treatment apparatus, wherein adjacent stirring blades are rotated in opposite directions to each other. 2. A rotating shaft is penetrated through an agitating tank having a closed structure, a closed cover is formed to cover the penetrating portion and the rotating shaft on the outside of the tank, and an air inlet and an inside of the cover are formed in the closed cover. 2. A suction port for sucking air is formed, and the air sucked from the suction port is heated by the hot air supply mechanism and sent to the stirring tank via a hollow portion of the rotating shaft. An organic waste treatment apparatus as described in the above. 3. A heater unit for heating air sent to the stirring tank is formed in a hot air supply mechanism, the periphery of the heater unit is covered with a closed cover, and an air inlet is formed in the closed cover to form the air. 3. The organic waste treatment according to claim 1, wherein air taken in from the intake is supplied to the heater unit through a flow path formed between the airtight cover and the heater unit. apparatus.