JP3257997B2 - Air lift stirring mechanism for stored manure and fermentation treatment device for manure using the mechanism - Google Patents

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 liquid or slurry liquid manure (hereinafter referred to as manure liquid) after solid-liquid separation of collected livestock or other manure using a dehydrator or the like. It belongs to the technical field of a manure liquid fermentation treatment apparatus which aerates it for a predetermined time and performs the treatment by microbial fermentation. TECHNICAL FIELD The present invention relates to a mechanism for agitating an air lift of stored manure fluid for diffusing a feces and a fermentation treatment apparatus for manure fluid using the mechanism.

[0002]

2. Description of the Related Art Aeration in a conventional fermentation treatment apparatus is performed by releasing air bubbles by an air diffuser arranged in a treatment tank, and the stirring is performed by this discharge flow or by stirring means such as a rotary blade. . In order to maintain the aerobic fermentation state in the stored liquid phase and increase the aeration efficiency, a large amount of aeration and its uniform diffusion are required, but this has led to the generation of a large amount of bubbles that are difficult to disappear. . Conventionally, in order to eliminate the foam, it is necessary to install a large-capacity, large-sized or a plurality of defoamers (for example, a shearing blade type defoamer) near the ceiling surface of the treatment tank. In addition, the stirring in the tank in which the viscosity of the slurry is high, apart from the liquid, is not sufficient only by the discharge flow from the air diffuser, and it is necessary to separately provide a stirring mechanism such as a driving rotary blade.

[0003]

However, the above configuration has the following problems.
Since moving parts such as rotors are arranged in the tank, they are complicated and are prone to failure.In addition, since such a stirring mechanism and a high-capacity defoamer are required, the equipment becomes larger and more complicated. In addition to the expensive equipment introduction costs, the subsequent operation and maintenance costs and maintenance and management costs also increased, which was a heavy burden for small-scale livestock farmers.

[0004] In view of the importance of the impact of waste on the environment, which has become increasingly severe in recent years, there is a concern that the livestock industry itself may decline in the tide where the introduction of such highly efficient processing equipment is required. Things. Therefore, the appearance of a fermentation treatment apparatus capable of realizing highly efficient processing of livestock manure with a simple and inexpensive apparatus has been desired.

[0005]

Accordingly, the present invention has been made in view of the above-mentioned problems, and forms a strong and uniform stirring flow in a processing tank by utilizing an upward flow in an air lift pipe, and a conventional defoamer. In addition to the above, a fixed type defoaming mechanism is provided to provide an effective air defoaming mechanism for the defoaming of stored feces and a fertilizer treatment device for feces using the same. Is what you do.

[0006]

Means for Solving the Problems In order to achieve the above object, a fermentation treatment apparatus for livestock manure according to the present invention and an air stirring / defoaming mechanism used for the same are configured as follows. Note that, in the above-described “Claims” section and this section “Means for Solving the Problems”, the reference numerals in parentheses added to the constituent elements correspond to the following embodiments for easy understanding of the invention. Are used for convenience, and the present invention is not limited to this form.

[0007] That is, a vertical processing tank (1) in which liquid feces liquid (F) obtained by solid-liquid separation of collected livestock manure is stored, and a substantially middle layer in the processing tank (1) is stored. A diffuser means (2) for discharging air from the vicinity upward and / or toward the periphery, and a lower end opening (30) is arranged so as to take in all or a part of the air released from the diffuser means (2). And an upper end opening (31) is exposed on the storage surface (S), and is provided upright with a cylindrical middle air lift pipe (3) and a middle air lift pipe (3). 40) is disposed near the bottom of the processing tank (1), and the upper end opening (4) is disposed.
1) is connected to a cylindrical bottom air lift pipe (4), which is exposed and standing on the storage surface (S), and a side surface of the bottom air lift pipe (4), and air is introduced into the pipe. An air supply pipe (5) and a part of the middle air lift pipe (3) and the bottom air lift pipe (4) are arranged and arranged so as to surround a part of the length, and the upper end opening (60) of the air supply pipe is stored in the storage surface. And a cylindrical center well (6) that is exposed and standing upright.

In addition to the provision of such an air lift stirring mechanism, a defoaming mechanism (7) and / or a defoaming machine (8) are disposed in the processing tank (1) above the storage surface (S). This constitutes a fermentation treatment device for feces fluid (F).

The defoaming mechanism (7) covers the upper end opening (60) of the center well (6) at a predetermined interval, and has a diameter larger than the diameter of the upper end opening (60). And a disk-shaped distribution plate (7) having openings (70a) at the top, and a disk-shaped distribution plate (7) disposed at a predetermined interval above the distribution plate (70).
1).

Further, in addition to the above configuration, the cover plate (7
1) a tubular introduction tube (8) having one or more through holes (80) formed in the abutting portion, and each through hole (80) of the introduction tube (8). ) Are arranged so as to cover each other, and an opening (81a) having only the lower side opened and a through hole (8) are provided.
0) and a bubble removal prevention plate (81) communicating with the bubble removal prevention plate (81).

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention; FIG. 1 is a partially cutaway perspective view schematically showing the entire configuration of the air lift stirring mechanism of the present embodiment, and FIG. 2 is a longitudinal sectional view showing the entire configuration of the fermentation treatment apparatus of the present embodiment. FIG. 3 is an enlarged longitudinal sectional view showing the defoaming mechanism of this embodiment.

The illustrated processing tank 1 is a storage container for storing a predetermined amount of liquid or slurry excrement F and performing a fermentation treatment on microorganisms, and is installed vertically in a sealed cylindrical shape. The bottom side is formed in a funnel shape, and the lower end thereof is formed with a drain portion 10 for discharging dust, dirt, and the like that do not decompose. In addition, an injection pipe 12 for injecting the excrement F to be processed into the vicinity of the outer periphery of the center well 6 described later is inserted through the upper side surface of the processing tank 1 and is located at a predetermined height position in the tank. Is provided with a discharge pipe 13 opened upward.

An air diffuser 2 is disposed near the center of the processing tank 1 and near the middle layer. The air diffuser 2 includes a pump with an ejector (hereinafter referred to as a “pump”) 20 and a processing tank 1.
It is located at approximately one-third the height from the bottom of the
0i is opened in the vicinity. Ejector unit 2
0e is connected to an intake pipe 21 communicating with the outside air.

A delivery pipe 22 bent substantially in an L-shape is connected to the delivery side of the pump 20, and a distributor 23 is attached to a discharge port 22m whose tip is opened upward so as to cover the outlet. I have. The distributor 23
Has a donut disk shape having an opening 23h at the center, and its periphery is curved downward with an appropriate curvature.

Above the distributor 23, an intermediate air lift pipe 3 having a cylindrical shape with both ends open is erected, and the lower end opening 30 formed in a trumpet shape is placed over the opening 23h of the distributor 23 at a predetermined interval. While being arranged, the upper end opening 31 is held so as to be exposed on the storage surface S of the feces fluid F. A plurality of notches 32 having a substantially V-shape are formed at a plurality of positions on the edge of the upper end opening 31.

In addition, a cylindrical bottom air lift pipe 4 is provided alongside the middle air lift pipe 3. The bottom layer air lift pipe 4 is connected to the lower end opening 40 of the processing tank 1.
, And is erected with the upper end opening 41 exposed on the storage surface S. Further, an air supply pipe 5 for introducing air into the pipe is connected to a side surface near the bottom of the bottom layer air lift pipe 4. The air supply pipe 5 is piped through from the side of the processing tank 1, and an air supply blower (not shown) is connected to the trunk thereof.

A cylindrical center well 6 is arranged on the outer peripheral side of the middle air lift pipe 3 and the bottom air lift pipe 4 so as to surround them with a certain gap. The center well 6 is open at both ends, exposing the upper end opening 60 from the storage surface S, and is annularly disposed below a predetermined length (in the embodiment, one third of the length of the bottom air lift pipe 6). are doing. Further, a plurality of notches 61 having a substantially V-shape are formed at a plurality of positions on the edge of the upper end opening 60.

On the upper side of the center well 6, a diverter 7 is provided.
A defoaming mechanism 7 including a cover plate 71 and a cover plate 71 is provided. In other words, a circular cap-shaped flow-distribution plate 70 having a peripheral edge inclined downward and an opening 70a formed in the center portion is provided above the upper end opening 60 of the center well 6 at a predetermined interval (50 in this embodiment).
１００100 mm) and has a diameter larger than the diameter of the upper end opening 60. Further, a disc-shaped cover plate 71 is attached to the upper part of the flow dividing plate 70 so as to overlap at predetermined intervals (30 to 50 mm in this embodiment). A substantially V-shaped notch 70b is formed at a plurality of locations in the radial direction on the peripheral edge of the flow dividing plate 70.

On the upper surface of the lid board 71, the ceiling surface 1 of the processing tank 1 is provided.
A cylindrical introduction tube 8 is formed so as to take in the introduction port 14 formed in 1, and a plurality of substantially semicircular through holes 80 are formed in a lower end edge joined to the cover board 71.

Each of the through holes 80 is provided with a bubble escape prevention plate 81 (hereinafter referred to as a "blocking plate 81") having a substantially U-shaped cross section. Then, it is attached to the peripheral side surface of the introducing cylinder 8 so as to communicate from the opening 81a to the through hole 80 so as to cover the through hole 80 from above.

In the upper outer surface of the processing tank 1, the above-mentioned inlet 1 is provided.
An antifoaming machine 9 communicated with 4 is arranged. The defoaming machine 9 used in the present embodiment is a known type, and is a shearing blade type impaction type in which a shearing blade is rotated in a defoaming space to crush and liquefy bubbles taken in from an inlet 14. Things.

[0022]

Next, the operation of the fermentation treatment apparatus will be described. First, the liquid or slurry excrement F is charged and stored in the treatment tank 1 via the injection pipe 12. Here, the pump 20 is started and the suction port 20 is started.
The manure fluid F near the middle layer is sucked from i (arrow a), and this is mixed with air taken in from the suction pipe 21 in the ejector section 20e and discharged upward from the discharge port 22m at the tip of the delivery pipe 22. (Arrow b).

A part of the discharged air-mixed feces fluid F is diffused obliquely downward in the radial direction by the distributor 23 (arrow c), and a part rises through the opening 24m and rises to the middle airlift pipe. The flow is divided into a flow (arrow d) rising from the lower end opening 30 of the inside 3 into the middle air lift tube 3. Further, the manure fluid F mixed with air bubbles ("mixed manure fluid F") has a specific weight that is relatively smaller than that of the surrounding manure, so that an upward flow is generated.
Due to the synergistic effect with the kinetic energy from the air, a more rapid upward flow is generated in the middle air lift tube 3.
The upward flow (arrow d) serves to draw the excrement F in the vicinity into the middle air lift tube 3 (arrow e) by setting the vicinity of the lower end opening 30 to a relatively low pressure state. Thereby, the vicinity of the lower end of the center well 6 is made relatively sparse, and the downward flow (arrow f) of the feces fluid F in the center well 6 is promoted.

The air injected from the air supply pipe 5 connected to the side surface near the bottom of the bottom layer air lift pipe 4 generates an upward flow in the pipe (arrow g). Then, as the water pressure decreases as the ascending rises, the air bubbles expand, and the apparent density of the air-mixed feces fluid F becomes lower toward the upper part of the pipe, so that the ascending flow accelerates its velocity at an accelerated rate and gushes out from the upper end opening 41 vigorously. (Arrow h). As a result, the pressure in the vicinity of the lower end opening 40 becomes relatively low, and the manure fluid F staying near the bottom of the processing tank 1 is strongly drawn from the lower end opening 40 (arrow i) and rises.

Next, as described above, the middle air lift pipe 3
The mixed manure fluid F that has rapidly risen in the inside and the bottom layer air lift tube 4 gushes up from the respective upper end openings 31 and 41 vigorously (arrows h and j), hits the flow dividing plate 70, and a part thereof. Part falls into the center well 6, part falls on the back surface of the flow distributor 70 and falls outside the center well 6 (arrow k), and part passes through the opening 70 a of the distributor 70. (Arrow 1), the kinetic energy is weakened by hitting the lid board 71.

At this time, when the feces fluid F is in the form of a slurry having a high viscosity, the notch 3 formed in the middle air lift tube 3, the bottom air lift tube 4, and the center well 6.
When the liquid overflows and leaks from 2, 42, 61, and fermentation proceeds to form a liquid material having a low viscosity, the liquid material is vigorously discharged from the upper end opening and is radially jetted along the back surface of the flow dividing plate 70 (arrow m). Then, the jet flow is combined with the feces flow (arrow n) in which the kinetic energy is attenuated by passing through the opening 70a of the flow dividing plate 70 and hitting the lid plate 71, and the flow is changed in the radial direction. , And serves to eliminate bubbles stagnating around the center well 6. The substantially V-shaped cutouts 32, 42, 61, and 70b formed on the peripheral edge of the middle air lift pipe 3, the bottom air lift pipe 4, the center well 6, and the flow distributor 70 are respectively formed in substantially the entire circumferential direction. Works to radiate evenly.

For this reason, the excess air which has been taken in from the intake pipe 21 by the ejector section 20e and has not been completely dissolved in the feces fluid F, or gas such as fermentation gas which has been defoamed and separated is passed through the introduction cylinder 8. Since the bubbles in the vicinity of the hole 80 have been eliminated, the gas is released to the outside air through the through hole 80 (arrow o) without being obstructed by the bubbles. In addition, some bubbles are so-called bridged in the space above the storage surface S in the tank, so that the bubbles that rise and flow around are prevented from directly entering the through holes 80 by the blocking plate 81 that is opened only at the bottom. Is done. In the vicinity of the opening 81 a opened below the blocking plate 81, the foam is defoamed by the jet flowing through the opening 70 a of the flow dividing plate 70, and only the gas passes through the through hole 80. Further, the air bubbles that have passed through the through holes 80 without being defoamed are defoamed by the defoaming machine 9 attached to the inlet 14, returned to the liquid, discharged, and discharged to the secondary fermentation tank (not shown). ) Or returned to the processing tank 1 again.

On the other hand, the manure fluid F blown onto the storage surface S by the middle air lift pipe 3 and the bottom air lift pipe 4 dissolves a large amount of oxygen in the center well 6.
Goes down (arrow f), and diffuses into the processing tank 1 from the lower end opening.

After the treatment for a certain period of time with uniform and efficient aeration by the agitated flow in the treatment tank 1 described above, the discharge pipe 13 is opened and the treated manure fluid F to a predetermined water level (upper third). Is discharged, and the manure fluid F to be treated is replenished from the injection pipe 12 to repeat the above fermentation treatment, that is, the treatment is performed in a so-called batch system (batch system).

That is, since the manure fluid F in the processing tank 1 after a predetermined time has passed is efficiently and effectively aerated and is almost in a state of near maturity, it is possible to remove the entire amount from the processing tank 1. However, in order to leave the inoculum for the next treatment and to secure the optimum temperature required for fermentation, the temperature is removed every third.

[0031]

As described above, the present invention is configured as described above, so that the manure fluid in the middle layer in the tank is taken in by the middle layer airlift pipe and agitated by the upper and lower streams. Since the manure in the bottom layer area is taken in and the stirring is performed in the upstream and downstream directions, the entire manure liquid in the tank can be uniformly stirred. As a result, a large amount of oxygen can be spread all over the entire area of the processing tank, and a uniform and good aerobic environment can be formed over the entire area. In other words, the bias of the aerobic environment in the tank caused by the stirring in the conventional method can be effectively eliminated.

Further, the defoaming mechanism constituted by the flow dividing plate and the lid plate enables defoaming using the jet flows from both air lift pipes, and at the vicinity of a through hole communicating with the defoaming machine. By eliminating bubbles, only gas can be efficiently recovered, and the burden on the defoaming machine can be reduced.

As described above, the present invention can realize a highly efficient fermentation treatment and has a simple structure with few moving parts, so that both the initial cost and the maintenance cost can be provided at low cost. The present invention provides an air lift stirring mechanism and an apparatus for fermenting feces fluid using the same, and greatly contributes at least to the development of the livestock industry due to its industrial applicability.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view schematically showing an entire configuration of an air lift stirring mechanism of the present embodiment.

FIG. 2 is a longitudinal sectional view showing the entire configuration of the fermentation treatment apparatus according to the present embodiment.

FIG. 3 is an enlarged longitudinal sectional view showing the defoaming mechanism of the present embodiment.

FIG. 4 is a partially cutaway explanatory view showing the defoaming mechanism of the present embodiment in an enlarged manner.

[Explanation of symbols]

 F Manure liquid S Storage surface 1 Treatment tank 10 Drain part 11 Ceiling surface 12 Injection pipe 13 Drain pipe 14 Inlet 2 Inlet diffuser 20 Pump 20i Inlet 20e Ejector 21 Inlet pipe 22 Outlet pipe 22m Outlet 23 Distributor 23h Open 3 Middle air lift pipe 30 Lower opening 31 Upper opening 32 Notch 4 Bottom air lift pipe 40 Lower opening 41 Upper opening 42 Notch 5 Air supply pipe 6 Center well 60 Upper opening 61 Notch 7 Defoaming mechanism 70 Divider 70a Opening 70b Notch 71 Cover 8 Inlet cylinder 80 Through hole 81 Bubble escape prevention plate 81a Opening port 9 Defoaming machine

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) C02F 11/02 ZAB

Claims (4)

(57) [Claims] 1. A vertical processing tank (1) for storing a liquid feces liquid (F) after solid-liquid separation of collected livestock manure, wherein the processing tank (1) has a substantially middle layer. A diffuser means (2) for discharging air from the vicinity upward and / or toward the periphery, and a lower end opening (30) is arranged to take in all or a part of the air released from the diffuser means (2). And an upper end opening (31) is exposed on the storage surface (S), and is erected in a cylindrical middle air lift pipe (3). 4
0) is disposed near the bottom of the treatment tank (1), and a bottom air lift pipe (4) having a top end opening (41) exposed on the storage surface (S) and standing upright; An air supply pipe (5) connected to the side of the lift pipe (4) to introduce air into the pipe; and a part of the length of the middle air lift pipe (3) and the bottom air lift pipe (4). A cylindrical center well (6), which is arranged so as to surround it and has its upper end opening (40) exposed on the storage surface and standing upright. Stirring mechanism. 2. A livestock manure fermentation treatment apparatus in which liquid manure liquid (F) after solid-liquid separation of collected manure is stored in a vertical treatment tank (1) and subjected to aeration and fermentation treatment. In addition to the air lift stirring mechanism described above, a defoaming mechanism (7) is provided in the processing tank (1) above the storage surface (S).
And / or a defoaming machine (8) is provided. 3. A defoaming mechanism (7) is covered at a predetermined interval above the upper end opening (60) of the center well (6), with a diameter larger than the upper end opening diameter, and an opening is formed at the center. (70a), and a disc-shaped lid (71) arranged above the flow divider (70) so as to overlap with a predetermined interval. An apparatus for fermentation treatment of manure fluid according to claim 2. 4. A defoaming mechanism (7) is placed over the upper end opening (60) of the center well (6) at a predetermined interval and with a diameter larger than the diameter of the upper end opening (60). A disk-shaped distribution plate (70) having an opening (70a) in the opening, a disk-shaped lid plate (71) arranged on the distribution plate (70) so as to overlap with a predetermined interval, and the lid plate (71). ), One or more through-holes (80) in the abutting portion, and a cylindrical introduction tube (8), and each through-hole (80) of the introduction tube (8). And a bubble removal prevention plate (81) having an opening (81a) opened only on the lower side and a communication hole (80). 2. An apparatus for fermentation treatment of feces fluid according to item 2.