JPH08267045A - Crude refuse treating device - Google Patents

Abstract

PURPOSE: To generate sufficient convectional motion in packing materials by constituting an agitating device to be built in a treating vessel of agitating vanes which are mounted via arms of a diametral direction at a revolving shaft erected at the center in the bottom of the treating vessel and rise spirally along the inside surfaces of the treating vessel. CONSTITUTION: An agitating device 11 in a treating vessel 3 is constituted by providing the front ends of the arm parts 13a of the arms 13 which is mounted on a revolving shaft 12 erected in the center of bottom of the treating vessel 3 and extending near to the inside wall surfaces of the treating vessel 3 with an agitating vanes 14. The agitating vanes 14 rise spirally along the inside surfaces of the treating vessel 3 in the direction where the vanes retreat toward the rotating direction of the arms 13 from the stop positions to the arms 13. Upward motion is generated in a packing materials 24 near the inside wall surfaces of the treating vessel 3 by the agitating vanes 14 and the outward motion is generate in the packing material 24 near the bottom by the arm 13, by which the activity of the aerobic bacteria is made vigorous and crude refuse 25 is rapidly decomposed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a food waste processing apparatus for processing food waste discharged at home to render it harmless.

[0002]

2. Description of the Related Art Generally, household waste is collected and treated collectively by local governments, but a large-scale treatment facility is required and the cost increases.
There are also bad odors and hygiene problems, which have become social problems.

[0003] Recently, therefore, there has been proposed a domestic food waste processing apparatus in which food waste is stored in a processing tank together with a filler, and the food waste is decomposed by the action of microorganisms.
Various products are commercially available.

For example, as an example thereof, Japanese Patent Laid-Open No. 5-660
The one described in Japanese Patent No. 32 is known. This product accommodates filler such as sawdust and raw garbage in the treatment tank, stirs the filler and raw garbage in the treatment tank with stirring blades, ferments the raw garbage to decompose it, and treats it. Is.

In this type of food waste treatment apparatus, when the food waste is decomposed by the action of microorganisms, it may be decomposed aerobically or anaerobically, but it has a high decomposition rate and a bad odor. In general, it is preferable to decompose aerobically in the presence of air, for example, due to the low generation of

[0006] Therefore, in the food waste processing device described in the above publication, a filler such as sawdust is put in the treatment tank, a stirring device for the filler is attached to the treatment tank, and it is openably and closably mounted on the upper portion of the treatment tank. The lid is equipped with a motor that drives the agitator to rotate and an air pump that sends air into the treatment tank, and agitates while blowing air into the filler to aerobically decompose the garbage and fill it. The air that has passed through the material is purified by the water removing means and the deodorizing means at the bottom.

In the stirring device in the apparatus disclosed in this publication, one end of an arm extending in the radial direction is attached to a rotating shaft that is erected at the center of the processing tank, and the tip of the arm is retracted in the rotating direction. In addition, a band-shaped stirring blade curved in a spiral shape with a radius of curvature smaller than the turning radius of the arm tip is provided upward.

[0008]

DISCLOSURE OF THE INVENTION In this device,
As the stirring device rotates, the receding angle of the stirring blade pushes the packing material near the inner wall surface of the processing tank upward, and the curvature radius of the curvature of the stirring blade is small, so that the packing material in the upper part is pushed inward. This is to stir by bringing the filler into convection motion.

However, in this stirring device, the filler near the inner wall surface of the processing tank moves upward by the action of the stirring blades,
Although the upward moving packing material collapses inward near the top surface, it moves inward, but at the bottom of the processing tank, the movement of the packing material from the central part to the outer peripheral part is less likely to occur, and proper convection motion can be achieved. Does not happen.

At the bottom of the processing tank, the weight of the upper packing material is heavy, and it is difficult to move in the pressed state, and the packed packing material is unraveled by the rotation of the arm near the bottom. An action occurs, but the action is small, and it is insufficient to move the packed packing material outward.

Further, in this apparatus, the arm extends from the rotary shaft in the radial direction of the processing tank, and the stirring blade is provided at the tip of the arm. Therefore, when the stirring blade rotates to stir the filler. Due to the resistance applied to the stirring blade, the force acting on the arm is unbalanced, and an oblique force is likely to act on the rotating shaft.

The present invention has been made in view of the above circumstances, in which the arm is fixedly attached to the rotary shaft at its center, the arms are extended in the diameter direction on both sides of the rotary shaft, and a stirring blade is provided at one end thereof. As a result, the balance of rotation is improved by the arm portion extending on the side opposite to the stirring blade, and the rotation of the arm portion more strongly unravels the packing material near the bottom part to promote the movement, which is sufficient for the packing material. The purpose is to generate convective motion.

[0013]

SUMMARY OF THE INVENTION The present invention is directed to a food waste processing apparatus for aerobically decomposing food waste while agitating a filler and food waste contained in a cylindrical processing tank. In the above, the stirring device has a rotating shaft that is erected at the center of the bottom of the processing tank, and an arm that fixes the central portion to the rotating shaft and that has both ends extending diametrically to the vicinity of the inner wall of the processing tank. It is an object of the present invention to provide a stirring blade that rises in a spiral shape along the inner surface of the treatment tank in a direction retracting from one end of the arm with respect to the rotation direction of the arm. .

Further, in the present invention, it is preferable that at least one of the ends of the arm is bent in the horizontal direction so as to be retracted with respect to the rotation direction of the arm.

Further, in the present invention, an annular recess is formed at the bottom of the processing tank, and a part of the arm on the side where the stirring blade is not provided is bent vertically so as to fit in the recess. Is preferred.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. The drawings show an embodiment of the food waste processing apparatus 1 of the present invention. In this food waste processing apparatus 1, 2 is an exterior body, and a cylindrical treatment tank 3 is housed in the exterior body 2. The upper opening of the treatment tank 3 is opened and closed by a lid 4 and a hinge 5. Possible blockage.

The exterior body 2 is composed of a shoulder body 6, a body 7 and a bottom body 8. The bottom body 8 is fixed to the bottom of the processing tank 3,
The shoulder body 6 is attached to the upper end portion of the processing tank 3, and the body 7 formed by bending a metal plate into a tubular shape is fixed by sandwiching the upper and lower ends thereof with the shoulder body 6 and the bottom body 8. There is.

As a structure for assembling the exterior body 2 and the processing bath 3, the processing bath 3 is generally housed in the exterior body 2 and the processing bath 3 is suspended above the exterior body 2. . However, since the processing tank 3 accommodates the filler 24 as described later, and a heavy member such as the stirring device 11 and the motor 15 described later is installed in the lower portion thereof, the weight becomes considerably large.

Therefore, the mounting plate 27 is mounted on the bottom body 8 of the exterior body 2.
By mounting the processing tank 3 via the and fixing both, and by attaching the shoulder body 6 and the body 7 to the processing tank 3 and the bottom body 8 having an integrated structure, it is possible to oversize the exterior body 2. It is forceless and does not need to be unnecessarily sturdy.

Reference numeral 9 denotes a take-out port provided on the lower side surface of the food waste treating apparatus 1 so as to communicate from the inside of the treatment tank 3 to the outside, through which the contents in the treatment tank 3 can be discharged. The closing lid 10 is normally closed.

Reference numeral 11 denotes a stirrer provided in the processing tank 3, which is a rotating shaft 1 provided upright at the center of the bottom of the processing tank 3.
An arm 13 is attached to the upper end of 2. The arm 13 is fixed to the rotating shaft 12 at the center thereof, and its tip extends to the vicinity of the inner wall surface of the processing tank 3.

A stirring blade 14 is provided at the tip of one arm portion 13a of the arm 13. The stirring blade 14 is made of metal and has a spiral shape along the inner surface of the processing tank 3 in a direction in which the stirring blade 14 is retracted from the position where the arm 13 is fixed to the arm 13 in the rotating direction. Is standing up to.

Further, the stirring blade 14 is the arm 13
The rear edge of the stirring blade 14 in the direction of rotation of the stirring blade 14 is twisted away from the inner wall surface of the processing tank 3 as it moves away from the position where the arm 13 is agitated. The inner surface 14a of the blade 14 is substantially parallel to the inner wall surface of the processing tank 3, and is twisted so that the inner surface 14a faces upward as it approaches the tip.

Further, as shown in FIG. 2, when the stirring blade 14 is projected on the bottom surface of the processing tank 3, the radius of curvature of the stirring blade 14 is the arm 1
The length of the stirring blade 14 is slightly smaller than the length of 3, and the stirring blade 14 is curved so as to separate from the inner wall surface of the processing tank 3 as the stirring blade 14 moves away from the position where the stirring blade 14 is attached to the arm 13.

Also, in this embodiment, the other arm portion 13b is bent in the horizontal direction so that its tip end is retracted with respect to the rotation direction of the stirring device 11, as shown in FIG.

As shown in FIG. 3, the stirring blade 14
It is also possible to form a bend in the arm portion 13a on the side where the is provided and to make the other arm portion 13b straight, or to form a bend in both arm portions 13a, 13b.

The stirring device 11 is composed of the rotating shaft 1
A motor 15 attached to the lower end of 2 drives the motor 2 to rotate.

An annular recess 16 is formed at the bottom of the processing tank 3, and an annular space 18 separated by a partition 17 is formed inside the recess 16. An air outlet 19 having a filter 28 is formed in the partition wall 17 between the space 18 and the recess 16.

An air inlet 20 is formed in the space 18, and an air pump 21 is used to form the air inlet 20.
The air is sent into the space 18 from the above, and the air is blown into the recess 16 of the processing tank 3 from the air outlet 19.

Then, in the arm 13 of the stirring device 11, the arm portion 13 on the side where the stirring blade 14 is not provided.
A bent portion 22 that is bent in the vertical direction is formed at the tip of b. The bent portion 22 is fitted in the recess 16, and the bent portion 22 passes immediately in front of the air outlet 19 as the stirring device 11 rotates.

Reference numeral 23 denotes a ventilation device provided on the lid 4, which vents the air in the processing tank 3 to the outside to ventilate the inside of the processing tank 3.

[0032]

When the food waste processing apparatus 1 of the present invention is used, the filler 24 such as sawdust is stored in the processing tank 3,
Garbage 25 is put into the filling material 24. Garbage 25
Can be opened by opening the lid 4 and added as required.

Then, the air pump 21 is used for the air inlet 20.
The air is sent into the space 18 from the above, the air is blown into the treatment tank 3 through the air outlet 19 and the air in the treatment tank 3 is discharged from the upper portion by the ventilation device 23 while the stirring device 11 is operated. The filler 24 and the garbage 25 in the processing tank 3 are agitated by rotating.

At this time, according to the present invention, since the two arm portions 13a and 13b of the arm 13 extend from the rotary shaft 12 to both sides, the arm 13 is well balanced and an unreasonable force is applied to the rotary shaft 12. There are few.

Further, as shown in FIG. 1, a resistance plate 26 having a wide width in the vertical direction is attached to the arm portion 13b on the side where the stirring blade 14 is not provided.
To resist the force applied to the stirring blade 14,
The balance of forces applied to both arm portions 13a and 13b is further improved.

Further, since the stirring blades 14 are inclined rearward from the position where the stirring blades are attached to the arms 13 and rise in a spiral shape, the stirring member 11 rotates so that the filler 2 near the inner peripheral wall of the processing tank 3 is rotated.
4 is pushed upward, and near the surface of the filling material 24, the filling material 24 moved upward in the peripheral portion collapses inward.

On the other hand, at the bottom of the processing tank 3, the filler 2
4, the filling material 24 is unraveled by passing the arm 13 through the inside, and fluidity is generated to move from the central portion to the outer peripheral direction to supplement the upwardly moving filling material 24 in the outer peripheral portion, and at the central portion from above. The filling material 24 moves downward due to its own weight.

Since the arm 13 passes twice through the same portion of the bottom of the processing tank 3 while the stirring device 11 makes one rotation,
The filling material 24 at the bottom is sufficiently loosened and can move sufficiently in the outer peripheral direction.

Further, as described in claim 2, the arm 1
By bending the end portion of 3 to the rear with respect to the rotation direction, the arm 13 pushes the packing material 24 outward by the rotation of the stirring device 11, and the packing material 24 at the bottom part of the processing tank 3 moves. The movement to the outside is done more smoothly.

Further, as in claim 3, an annular concave portion 16 is formed in the bottom portion of the processing tank 3, and the bent portion 2 of the arm portion 13b is formed.
By fitting 2 into the recess 16, the filler 24 that is lowered from the center of the processing tank 3 and unwound by the arm 13 is recessed 1
By dropping to 6, it becomes easy to move outward.

Therefore, as shown by the arrow in FIG. 1, the filler 24 moves upward in the outer peripheral portion of the processing tank 3, moves inward near the surface, and moves downward in the central portion of the processing tank 3, It circulates in the processing tank 3 so as to move in the outer peripheral direction at the bottom, and convection motion is generated to stir the raw garbage 25
Effectively mixed with.

The air blown out from the air outlet 19 mixes with the filling material 24 and quickly decomposes the food waste 25 mixed with the filling material 24, and the moisture produced by the decomposition rises with the air. , And is discharged to the outside by the ventilation device 23.

[0043]

As described above, according to the present invention, the stirring blade 1
Due to the presence of the arm portion 13b on the side where 4 is not provided,
The rotation of the arm 13 is well balanced, the stirring device 11 is not subjected to an excessive force, and smooth rotation can be obtained.

By providing the resistance plate 26 on the arm portion 13b as shown in FIG. 1, the rotation resistance of the arm portion 13b is increased and the resistance due to the stirring blades 14 is offset to further improve the balance.

Further, according to the present invention, the stirring blade 14 causes upward movement of the filler 24 near the inner wall surface of the processing tank 3,
The arm 13 causes outward movement of the filling material 24 near the bottom, so that convective movement is generated over the entire filling material 24 in the processing tank 3, and the filling material 24 is mixed with the food waste 25 and blown into it. Aerobic bacteria are actively activated by the action of the trapped air, and the garbage 25 is rapidly decomposed.

According to the second aspect, by bending the tip of the arm 13 rearward, the filler 24 at the bottom of the processing tank 3 is moved in the outer peripheral direction to further promote the convective movement of the filler 24. .

According to claim 3, the filling material 2 in the central portion is
When 4 is dropped into the annular concave portion 16, the outward movement occurs, and the convective movement of the filling material 24 is promoted.

As in the embodiment, the air supplied from the bottom of the processing tank 3 is exhausted from the ventilation device 23 through the filling material 24 by performing ventilation with the ventilation device 23 provided on the lid 4. In addition, since the garbage 25 is constantly in contact with fresh air, the activity of bacteria is also increased and the decomposition of the garbage 25 is promoted.

[Brief description of drawings]

FIG. 1 is a central longitudinal sectional view of an embodiment of the present invention.

FIG. 2 is a plan view of the processing tank 3 and the stirring device 11 according to the embodiment of the present invention.

FIG. 3 is a plan view of a processing tank 3 and a stirring device 11 according to another embodiment of the present invention.

[Explanation of symbols]

 1 Garbage Disposal Device 3 Treatment Tank 11 Stirrer 12 Rotating Shaft 13 Arm 14 Stirring Blade 24 Filler 25 Garbage

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Junji Sumida 1-20-5 Tenma, Kita-ku, Osaka-shi, Osaka Zojirushi Mahobin Co., Ltd.

Claims (3)

[Claims] 1. The raw garbage (25) is aerobically agitated while stirring the filler (24) and the raw garbage (25) contained in a cylindrical treatment tank (3) with a stirring device (11). In the decomposing food waste treatment device (1), the stirring device (11) comprises a rotating shaft (12) erected at the center of the bottom of the treatment tank (3),
An arm (13) having its center fixed to the rotary shaft (12) and extending in the diametrical direction to both ends of the arm (13) near the inner wall of the processing tank (3); 13) A stirring blade (1) rising spirally along the inner surface of the treatment tank (3) in a direction retracting with respect to the rotating direction of the same.
4) and a garbage treatment device 2. A tip of at least one of the arms (13) is bent in a horizontal direction so as to be retracted with respect to a rotation direction of the arm (13). Garbage disposal device according to 1. 3. An annular recess is formed at the bottom of the processing tank (3), and a part of the arm (13) on the side where the stirring blade (14) is not provided fits into the recess. 1 is bent in the vertical direction as described above.
Or the garbage processing device described in 2.