JPH08267044A - Crude refuse treating device - Google Patents

Abstract

PURPOSE: To increase the effect of pushing packing materials upward and to impart sufficient convectional motion to these packing materials by spirally rising band-shaped agitating vanes along the inside surfaces of a treating vessel and torsionally turning these vanes in a direction where the edges on a rear side part from the inside wall surfaces of the treating vessel toward the rotating direction. CONSTITUTION: An agitating device 11 in a treating vessel 3 is formed by extending the front ends of arms 13 mounted at a revolving shaft 12 near to the inside wall surfaces of the treating vessel 3 and providing the front ends 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. The agitating vanes 14 are twisted in the direction where the edges on a rear side part from the inside wall surfaces of the treating vessel 3 toward the rotating direction of the agitating vanes 14 from the stop positions to the arms 13. As a result, a packing materials 22 are pushed up with the force larger toward the front surface from the bottom of the treating vessel 3. The decomposition of crude refuse 23 is accelerated by activating the movement of the packing materials 22.

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, a radial arm is attached to a rotary shaft that is erected at the center of the processing tank, and the arm tip is retracted with respect to the rotational direction and the arm tip is retracted. The strip-shaped stirring blade curved in a spiral shape with a radius of curvature smaller than the rotation radius 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 blade, since each part of the strip-shaped stirring blade is substantially parallel to the rotation direction, the action of moving the filler upward based on the receding angle is equal to the thickness of the plate of the stirring blade. It only works, and it does not allow sufficient convective motion in the filling material.

The present invention has been made in view of the above circumstances, and by imparting a slight twist to the stirring blade, the action of pushing the filler upward can be increased and sufficient convection to the filler can be achieved. The purpose is to create exercise.

[0011]

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 comprises a rotating shaft erected at the center of the bottom of the processing tank, an arm extending in the radial direction from the rotating shaft to the vicinity of the inner wall of the processing tank, and a strip-shaped arm provided at the tip of the arm. A stirring blade, and the stirring blade spirally rises upward along the inner surface of the processing tank in a direction in which the stirring blade is retracted from the fixing position to the arm with respect to the rotation direction of the arm. In addition, the rear edge of the stirring blade is twisted in the direction away from the inner wall surface of the processing tank in the direction of rotation of the stirring blade as the distance from the arm increases.

In the present invention, it is preferable that the stirring blade is curved so as to be separated from the inner wall surface of the processing tank as it is separated from the arm.

[0013]

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 bath 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 22 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 24 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 from the inside of the treatment tank 3 to the outside, through which the contents of 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 in the center of the bottom of the processing tank 3.
An arm 13 is attached to the upper end of 2, and the tip of the arm 13 extends to the vicinity of the inner wall surface of the processing tank 3, and a stirring blade 14 is provided there. The stirring device 11 includes a motor 15 attached to the lower end of the rotary shaft 12.
By this, it can be driven to rotate.

The stirring blade 14 is a metal strip and is disposed in the processing tank 3 in the direction in which the stirring blade 14 is retracted from the position where the stirring blade 14 is attached to the arm 13 with respect to the rotation direction of the arm 13.
It rises spirally upward along the inner surface of the.

The stirring blade 14 is the arm 1
3 as they move away from the position where they are attached to the stirring blade 14
The rear edge in the direction of rotation is twisted in a direction away from the inner wall surface of the processing tank 3. That is, the arm 13
The inner side surface 14a of the stirring blade 14 is substantially parallel to the inner wall surface of the processing tank 3 near the position where the inner surface 14a is attached to the stirring blade 14, and the inner side surface 14a is twisted so as to face upward as it approaches the tip.

In FIG. 1, the solid line shows the state where the agitation blade 14 and the arm 13 are fastened to the right side in the figure, and the chain line shows the state where the fastened position is to the front of the drawing. There is.

Further, in this embodiment, as shown in FIG. 2, the radius of curvature of the stirring blade 14 projected on the bottom surface of the processing tank 3 is slightly smaller than the length of the arm 13, and the stirring blade 14 is fixed to the arm 13. As it moves away from the position, the stirring blade 1
4 is curved so as to be separated from the inner wall surface of the processing tank 3.

An annular space 16 is formed at the bottom of the processing tank 3, and an air outlet 17 having a filter 25 is formed on the outer peripheral wall surface of the space 16.
An air inlet 18 is formed in the space 16,
Space 1 from the air inlet 18 by the air pump 19
Air is sent into the inside of the processing tank 6, and the air is blown into the processing tank 3 through the air outlet 17.

A bent portion 20 is formed on the other end of the arm 13 of the stirring device 11, and the bent portion 20 passes immediately in front of the air outlet 17 as the stirring device 11 rotates. Is preferred.

Reference numeral 21 denotes a ventilator 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.

[0026]

When the food waste treating apparatus 1 of the present invention is used, the filler 22 such as sawdust is stored in the treatment tank 3,
Garbage 23 is put into the filler 22. Garbage 23
Can be opened by opening the lid 4 and added as required.

Then, the air pump 19 is used for the air inlet 18
The air is sent into the space 16 from the above, the air is blown into the processing tank 3 through the air outlet 17, and the agitator 11 is discharged while the air in the processing tank 3 is discharged from the upper portion by the ventilation device 21. The filler 22 and the garbage 23 in the processing tank 3 are agitated by rotating.

At this time, according to the present invention, since the stirring blade 14 is inclined backward from the position where it is attached to the arm 13 and rises in a spiral shape, the inner peripheral wall of the processing tank 3 is rotated by the rotation of the stirring device 11. An upward force is applied to the filler 22 in the vicinity, and the inner surface 14a of the stirring blade 14 is twisted so as to gradually become upward as the blade 14 moves from the attachment position to the arm 13 toward the tip. 14 is a filler 22
The effect of pushing upwards is small near the bottom of the processing tank 3 and large near the top.

Therefore, the filler 22 is pushed up with a small force near the bottom of the processing tank 3 and with a larger force as it approaches the upper surface, so that the movement of the filler 22 in the processing tank 3 becomes active, and the filler 22 also moves. 22 is released and contains more air, which promotes the decomposition of food waste 23.

In the vicinity of the bottom of the treatment tank 3, the filler 22 moves upward from the center to compensate for the filler 22 that has moved upward near the inner wall surface of the treatment tank 3 and agitates near the inner wall surface of the treatment tank 3. The filler 22 pushed up by the blades 14
Collapses inward on its upper surface, causing downward movement in the central portion of the processing tank 3.

Therefore, as shown by the arrow in FIG.
2 moves upward in the vicinity of the inner wall surface of the processing tank 3 and moves downward in the central portion. Further, concomitantly, a movement from the center to the outside at the bottom portion, and a movement from the outer peripheral portion to the center portion near the surface occur, causing convective motion that rotates as a whole.

Further, due to the twisting of the stirring blade 14, the inner surface 14a is inclined upward near the tip thereof,
A force for moving the filler 22 near the upper surface inward is generated by the inner side surface 14a, thereby promoting the convection motion.

Further, according to the second aspect of the present invention, the stirring blade 14 moves away from the inner wall surface of the processing tank 3 as it goes from the position where the stirring blade 14 is attached to the arm 13 to the tip, and therefore the shape of the filler 22 near the upper surface is also improved. The convection movement is promoted by moving it inward.

When the stirring blade 14 has a small effect of moving the filler 22 upward, even if the stirring blade 14 has a function of moving the filler 22 in the vicinity of the upper surface inward due to the curved shape of the stirring blade 14, convection motion is caused. Is not promoted, and a large amount of the filler 22 is packed in the vicinity of the center to prevent the filler 22 from containing air, which may be an obstacle to the acceleration of decomposition of the garbage 23.

[0035]

As described above, according to the present invention, a strong upward motion is generated in the packing material 22 near the inner wall surface of the processing tank 3, and the packing material 22 in the processing tank 3 causes convective motion based on the strong upward motion. Aerobic bacteria are actively activated by the action of the air that is mixed with the food waste 23 and blown into the filling material 22, and the food waste 23 is quickly decomposed.

Further, since the upward movement of the filler 22 by the stirring blade 14 is relatively small near the bottom of the treatment tank 3 and large near the top of the treatment tank 3, the filler 22 in the treatment tank 3 is loosened and contains a large amount of air. It is possible to promote the decomposition of the food waste 23.

Furthermore, the twisting shape of the stirring blade 14 causes a force to push the vicinity of the upper portion of the filler 22 inward, so that the convection movement of the filler 22 becomes smoother. Due to the curved shape of the, its function becomes larger and smoother convection motion can be obtained.

Further, as shown in the embodiment, an annular space 16 is formed at the bottom of the processing tank 3, and air is blown out from an air outlet 17 formed on the outer periphery of the space 16,
The filler 22 can be made to contain air as a whole, and in combination with the convective movement of the filler 22 by the stirring blades 14, a large amount of air is included in the filler 22 so that the raw garbage 2
3 breaks down faster.

By ventilating with the ventilator 21 provided on the lid 4, the air supplied from the bottom of the processing tank 3 will be discharged from the ventilator 21 through the inside of the filler 22, and the garbage 23 As the bacteria constantly come into contact with fresh air, the activity of bacteria becomes more active, and the decomposition of the garbage 23 is accelerated.

[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.

[Explanation of symbols]

 1 Garbage Disposal Device 3 Processing Tank 11 Stirrer 12 Rotating Shaft 13 Arm 14 Stirring Blade 22 Filling Material 23 Garbage

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

Claims (2)

[Claims] 1. The raw garbage (23) is aerobically agitated while stirring the filler (22) and the raw garbage (23) housed in the 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),
It has an arm (13) extending in the radial direction from the rotary shaft (12) to near the inner wall of the treatment tank (3), and a band-shaped stirring blade (14) provided at the tip of the arm (13). The stirring blade (14) spirals along the inner surface of the treatment tank (3) in a direction in which the stirring blade (14) is retracted from the fixing position to the arm (13) with respect to the rotation direction of the arm (13). The arm (1
3) The garbage disposal device, characterized in that the rear edge of the stirring blade (14) is twisted in the direction away from the inner wall surface of the treatment tank (3) as it moves away from the stirring blade (14). 2. The stirring blade (14) according to claim 1, characterized in that the stirring blade (14) is curved so as to move away from the inner wall surface of the processing tank (3) as it moves away from the arm (13). Garbage processing equipment