JP2000288593A - Air bubble treatment mechanism of excretion fermentative treatment apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air bubble treatment mechanism adaptable not only to an apparatus for treating liquid excretion separated from collected livestock excretion but also to an apparatus for treating highly viscous excretion as it is without subjecting livestock excretion to solid-liquid separation and removing air bubbles generated in a fermentative treatment tank effectively and efficiently. SOLUTION: A defoaming device 2 for taking in air bubbles accumulated on a liquid surface S to perform defoaming is arranged to the upper part of a treatment tank 1 so as to communicate with the internal space of the treatment tank and the excretion liquid FL defoamed by the defoaming device 2 is again returned to the treatment tank and ejected on a disc body 30 having radially erected blade plates 31, which constitute sprinkling blades rotated in the vicinity of the liquid surface S, attached thereto to be sprinkled over air bubbles on the liquid surface to be defoamed. Further, diffusion blades rotated at the position above the sprinkling blades by an almost vertical rotary shaft 40 and accumulated air bubbles are gathered to be taken in the air bubble taking-in port 15 of the defoaming device opened to the ceiling surface 11 of the treatment tank by the rotation of the diffusion blades.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for storing livestock manure in a treatment tank, aerating it, and attaching it to a manure fermentation treatment apparatus for microbial fermentation, wherein air bubbles generated in the treatment tank are provided. The present invention relates to a bubble treatment mechanism of a manure fermentation treatment apparatus for the purpose of treatment.

[0002]

2. Description of the Related Art Conventionally, in a livestock manure fermentation treatment apparatus, in order to eliminate bubbles generated by aeration for promoting aerobic fermentation, air bubbles are generated by a rotary wing arranged near the upper level of the liquid level in a treatment tank. And a method in which manure pumped from the treatment tank is sprayed on air bubbles to eliminate bubbles (pumping spraying method).

However, in such a method, when a large amount of air bubbles are generated and accumulated in the processing tank, the air bubbles cannot be completely eliminated and leak out of the processing tank to emit a bad smell to the surroundings. Was.

[0004] To prevent this, when the number of air bubbles becomes too large, the amount of injected air is reduced to suppress the generation of air bubbles, or the aeration is temporarily interrupted to resume the operation after the air bubbles are reduced. I was doing.

[0005]

However, reducing the amount of aeration for defoaming is not preferable because it reduces the speed of the fermentation treatment and causes anaerobic fermentation. In the conventional pumping and spraying method, the pumping pump is easily clogged, and even if it can be sprayed, it is unlikely to be sprayed, so that the defoaming effect is low, and in particular, high viscosity such as slurry manure before solid-liquid separation. In manure, it was difficult to apply.

[0006]

Accordingly, the present invention has been made to solve the above-mentioned problems, and it is of course possible to use a high-viscosity as-is without solid-liquid separation in a treatment device for liquid manure which is solid-liquid separated from collected livestock manure. The present invention provides a foam treatment mechanism of a manure fermentation treatment apparatus, which is applicable to a manure treatment apparatus and aims to effectively and efficiently defoam the bubbles generated in a fermentation treatment tank. is there.

[0007]

Means for Solving the Problems In order to achieve the above object, the present invention is configured as follows. It should be noted that the symbols given to each component in this section and in the claims are used for convenience to facilitate understanding, and are not limited to such forms.

[0008] More specifically, a treatment device for aerating fermentation treatment by aerating stored livestock manure (F), which treats air bubbles generated on the liquid level (S) of manure (F). In the bubble treatment mechanism of (1), the liquid level (S) is set in the upper outside (11) of the treatment tank (1) in communication with the internal space.
One or two or more defoaming means for taking in the air bubbles accumulated on the top and defoaming them, and excrement liquid (F
L) is returned to the treatment tank (1) again, and is sprayed on bubbles on the liquid surface (S) by one or more spraying means.

More specifically, the spraying means (3) is rotated substantially horizontally above the liquid level (S) of the processing tank (1).
0) and a plurality of vanes (31) radially arranged around the disk (30). Preferably, the blade surface inclination and the rotation direction are set so that the thrust acting direction of the blade plate (31) is downward.

In addition, a diffusion blade (5) that rotates with a substantially vertical rotation axis (40) is disposed at a position above the spraying means (5), and the rotation of the diffusion blade (5) causes the treatment tank (1) to rotate. It is characterized in that the accumulated air bubbles are brought to the air bubble inlet (15) of the defoaming means (2) opened in the ceiling surface (11). In the above, the same rotating shaft (40)
The wings (5) and the scatter wings (3) may be arranged at the same time.

[0011]

According to the above construction, the present invention operates as follows. That is, most of the air (oxygen) injected into the treatment tank for aeration rises without dissolving in the excrement and bursts on the liquid surface to generate air bubbles. The injection of a large amount of air generates a large amount of air bubbles, which accumulates and fills the processing tank space above the liquid level. Such bubbles are taken into the defoaming means, defoamed, and separated into a liquid component and a gas component. The gaseous component is released, and the liquid component is returned to the spraying means and sprayed on the bubbles in the processing tank. By this spraying, the droplets are defoamed by hitting the air bubbles.

According to the second aspect of the present invention, the defoamed low-viscosity liquid impinges on the rotating spray blade and is spread in a wide range in the radial direction. In the configuration of claim 3, the spray from the spray wing descends at a speed faster than the natural fall and hits the bubble,
More effective defoaming treatment is performed.

According to the fourth aspect of the present invention, the bubbles filled and accumulated in the upper portion of the processing tank are radially diffused by the rotation of the diffusion blade, and are accumulated in the bubble inlet of the defoaming means on the ceiling surface, and the efficiency is sequentially increased. It is taken into the defoaming means well, and defoaming is performed efficiently. In the configuration of the fifth aspect, the diffusion blade and the spray blade rotate at the same rotation speed, and the bubble diffusion and the spray dispersion are performed by a single drive motor.

[0014]

Next, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is an enlarged longitudinal sectional view showing the spraying means and the spreading means of the present embodiment,
FIG. 2 is an enlarged perspective view of a main part showing a configuration of a spraying unit and a diffusion unit of the present embodiment, and FIG. 3 is a longitudinal sectional view schematically showing an entire configuration of the present embodiment.

Reference numeral 1 denotes a processing tank. The processing tank 1
Is a container body for solid-liquid separation of collected livestock excreta, or for directly charging and storing it without solid-liquid separation, forming a substantially sealed cylindrical shape and arranged vertically. I have.

An inlet 12 for introducing manure F to be treated is disposed on a ceiling surface 11 of the treatment tank 1, and a hopper-like bottom portion having a gradually decreasing diameter is provided at a lower portion of the treatment tank 1. A drain portion 14 is formed at the lowermost portion to take out sediment such as accumulated sand and gravel, or to discharge the treated manure F.

A defoaming device 2 is disposed on the outer upper surface of the processing tank 1. Defoaming device 2 used in this embodiment
Is a shear blade rotating in the defoaming space 20 (not shown).
This is a shear-wing type impact type in which bubbles taken in from a later-described bubble inlet 15 are crushed and liquefied.

A discharge pipe 21 for discharging the defoamed and liquefied excreta F (hereinafter referred to as “excreta FL”) is provided in the defoaming space 20.
The discharge pipe 21 is connected at its tip to an exhaust pipe 22 that opens upward in a chimney shape and a liquid feed pipe 23 that extends into the processing tank 1 in a branched manner.

The shear wing-type impact defoaming device is a conventional technology, and its detailed mechanism is omitted. However, the present applicant has already filed Japanese Patent Application No. Hei 10-246.
No. 091. Further, a bubble reservoir 16 is formed in the ceiling surface 11 of the processing tank 1 in a space protruding upward, and an air bubble inlet 15 communicating with the bubble reservoir 16 is opened.
Air bubbles are introduced into the defoaming device 2 from the above.

Reference numeral 3 denotes a spray blade 3 as a spray means.
And is disposed near the upper level near the liquid surface S. The spray blade 3 is attached to a rotating shaft 40 that penetrates into the processing tank 1 from a drive motor 4 disposed above the processing tank 1 so that the rotation surface is substantially horizontal (substantially parallel to the liquid level). ing.

The spray blade 3 is composed of a disk body 30 constituting a central portion of a pivotal support, and a blade plate 31 attached to the disk body 30 in a substantially radial direction at a center angle of approximately 60 degrees.
The blade 31 is set to have a blade surface inclination (45 degrees in the embodiment) and a rotation direction such that the thrust action direction by rotation is downward in the liquid surface direction. In addition, an outlet 23 d of the liquid feed pipe 23 is provided on the upper surface of the disc 30 that forms the vicinity of the center of the spray blade 3.
Are arranged close to each other.

The defoaming device 2 is provided by the configuration of the spray blade 3.
The excrement FL which has been defoamed and liquefied is guided to the liquid sending pipe 23 through the discharge pipe 21 and poured into the upper surface of the rotating disk 30 from the outlet 23d. The poured manure fluid FL is sprayed downward as radiation due to the centrifugal force of the rotating disk 30 and the inclination of the blades.

Reference numeral 5 denotes a diffusion blade as a means for diffusing bubbles. The diffusion wing 5 is disposed above the above-mentioned scatter wing 3 and attached to the same rotation shaft 40 as the scatter wing 3.
The diffusion wing 5 includes a disk body 50 forming a shaft support center,
A wing plate 51 is attached to the disk 50 in a substantially radial direction at a center angle of approximately 60 degrees. Further, the wing plate 51 is installed so as to be deflected approximately 5 degrees in the circumferential direction from the radial direction, and the phase difference between the wing plate 31 and the wing plate 31 is set to approximately 30 degrees. I have.

With the configuration of the diffusion blade 5, the air bubbles accumulated near the ceiling surface 11 beyond the spray blades 3 are accumulated around the ceiling surface 11 by the rotational force of the diffusion blade 5 or swirling wind and swirl. . Then, the bubble reservoir 16 on the ceiling surface 11
Since the air bubbles collected in the air are taken into the defoaming space 20 from the air bubble inlet 15, the air bubbles are continuously accumulated one after another.
6 to be efficiently collected.

Next, reference numeral 6 denotes air mixing means. The air mixing means 6 is for mixing air (oxygen) (hereinafter referred to as "aeration") in order to secure the aerobicity of the manure F in the treatment tank 1 and activate the growth of aerobic bacteria. . There have conventionally been various configurations of such a mechanism.
A device that mixes as fine bubbles as possible to increase the amount of dissolved oxygen in the manure F, such as a jet pump or a bubble generator, may be used. The air mixing means 6
Is not the gist of the invention of the present application, and the existing device can be applied.

Reference numeral 7 denotes a stirring blade as stirring means. The stirring blade 7 is arranged in the middle of the stored manure F, and the rotating shaft 40 to which the above-mentioned spray blade 3 and the diffusion blade 5 are attached is extended vertically and arranged in two stages. The airfoil of the agitating blade 7 has an opposed linear shape, the blade surface inclination with respect to the rotation direction is set so that a downward thrust acts, and the upper and lower mounting phase difference is set to 90 degrees. The rotation shaft 40
Are already manufactured.

[Operation of Embodiment] Next, the operation of the fermentation treatment apparatus A will be described. First, feces and urine F (or simply referred to as "feces and urine F") including livestock dung and urine, and litter such as straw and sawdust to which the dung F is adhered are introduced from the inlet 12 of the treatment tank 1. It is stored and stirred by rotating the stirring blade 7 (about 51 rotations per minute), and air is injected from the air mixing means 6.

The injected air is stirred and a part of the air is dissolved in the manure F, but most of the air rises as bubbles,
It pops on the liquid surface S to generate bubbles. Since these air bubbles are composed of manure having a high viscosity, the surface tension is large and the air bubbles accumulate in the space above the liquid surface S one after another without spontaneous defoaming.

The air bubbles thus accumulated are brought to the periphery of the ceiling surface 11 by the rotation of the diffusion blades 5 and swirled by the rotation of the diffusion blades 5 as described above, and then defoamed from the air bubble inlet 15 opened in the air bubble reservoir 16. The second defoaming space 20 is successively taken in and collected.

Next, as described above, the bubbles taken into the defoaming device 2 are defoamed into the liquid excrement FL, and are returned to the processing tank 1 again through the discharge pipe 21 and the liquid feed pipe 23. , Is poured onto the upper surface of the disk 30 of the spray wing 3. The excrement fluid FL is sprayed downward with a certain initial velocity by the rotation of the spray wings 3 and collides with air bubbles, thereby serving as a defoamer. The manure F that has been aerated and processed in the processing tank 1 for a predetermined time is discharged out of the system by the drain unit 14 or a discharge unit (not shown) provided separately.

[0031]

[Possibility of Other Embodiments] The above embodiment is a preferred and simple embodiment embodying the technical idea of the present invention, but this is merely an example of the embodiment, and is not limited thereto. Of course, the technical idea of the invention is included in the same category even if the following forms are adopted.

That is, the number of dispersing means and diffusing means is not limited to one as shown in the figure, but may be plural in consideration of the processing capacity. There is no need to have them, they are arranged independently,
Each may operate independently. Further, also in the stirring means, it is not necessary to arrange them coaxially as shown in the figure, but they may be arranged independently independently of each other and operated separately.

[0033]

As described above, the present invention has the following advantages. That is, air bubbles generated from manure in the treatment tank can be efficiently taken into the defoaming device, and furthermore, the defoamed and low-viscosity manure liquid is again radially sprayed from the spray blades as droplets. In addition, air bubbles in the processing tank can be effectively eliminated.

By adopting the structure of claim 2, it is possible to spray effectively with a simple structure, and when a plurality is arranged, it is possible to more efficiently defoam.

According to the configuration of the third aspect, the droplets can be radiated downward with a certain initial velocity, so that the bubbles can be more effectively eliminated.

According to the fourth aspect of the present invention, the bubbles that have passed through the spraying means are diffused by the rotating diffusion means to the peripheral portion of the ceiling surface and swirled, so that the bubbles are effectively eliminated from the bubble intake. Can be incorporated into a foaming device.

Further, according to the fifth aspect of the present invention, by disposing the diffusion blade and the spray blade coaxially, there is an effect that the maintenance and maintenance are facilitated by a simple structure.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a spraying unit and a diffusion unit of the present embodiment.

FIG. 2 is an enlarged perspective view of a main part showing a configuration of a spraying unit and a diffusion unit of the present embodiment.

FIG. 3 is a longitudinal sectional view schematically showing the entire configuration of the present embodiment.

[Explanation of symbols]

 A Fermentation treatment apparatus F Manure FL Manure liquid S Liquid level 1 Processing tank 11 Ceiling surface 12 Input port 13 Bottom part 14 Drain part 15 Bubble intake port 16 Bubble pool 2 Defoaming device 20 Defoaming space 21 Discharge pipe 22 Exhaust pipe 23 Sending Liquid pipe 23d Outflow pipe 3 Spray blades (spraying means) 30 Disk plate 31 Blade plate 4 Drive motor 40 Rotary shaft 5 Diffusion blade (diffusion means) 50 Disk plate 51 Blade plate 6 Air mixing means 7 Stirring blade (Stirring means)

Continued on the front page (72) Inventor Masayoshi Amita 6-2-5 Kurume, Koriyama-shi, Fukushima F-term in Shinto Eco-Techno Co., Ltd. 4B029 AA02 BB01 CC01 CC02 CC07 DA10 DB01 DB11 DE02 DE08 4D059 AA01 BA03 BA48 BJ03 BK30

Claims (5)

[Claims] 1. A treatment apparatus for aerating fermentation treatment by aerating stored livestock manure (F), wherein the liquid level (S) of manure (F) is provided.
In the air bubble treatment mechanism of the manure fermentation treatment apparatus (A) that treats the air bubbles generated above, it is arranged in communication with the internal space at the upper outside (11) of the treatment tank (1) and stays on the liquid surface (S). One or more defoaming means for taking in the accumulated air bubbles and defoaming them; and excrement fluid (FL) returned to a liquid state by the defoaming means, is returned into the treatment tank (1) again and the liquid level (S) A foam treatment mechanism for a manure fermentation treatment apparatus, comprising: one or more spraying means for spraying the air bubbles. 2. A spraying means comprising: a disk (30) rotating substantially horizontally above a liquid level (S) of a processing tank (1); and a plurality of sheets radially arranged around the disk (30). The air bubble treatment mechanism of the manure fermentation treatment apparatus according to claim 1, characterized in that the spray blade (3) comprises a wing plate (31). 3. The air bubble treatment mechanism of the manure fermentation treatment apparatus according to claim 2, wherein the blade surface inclination and the rotation direction are set so that the thrust action direction of the blade plate (31) is downward. 4. A diffusion blade (5) rotating with a substantially vertical rotation axis (40) is disposed at a position above the spraying means (5), and the rotation of the diffusion blade (5) causes the treatment tank (1) to rotate. 4. Manure according to claim 1, 2 or 3, characterized in that the accumulated air bubbles are brought to the air intake (15) of the defoaming means (2) opened on the ceiling surface (11). Bubble treatment mechanism of fermentation treatment equipment. 5. A wing (5) and a scatterer (3) are arranged on the same axis of rotation (40).
The air bubble treatment mechanism of the manure fermentation treatment apparatus according to 2, 3, or 4.