JP3187168B2 - Multi-stage storage tank - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multistage storage tank used for a fermentation tank for dewatered sludge.

[0002]

2. Description of the Related Art Heretofore, when viscous substances having a large amount of water are stored in a storage tank, a bridge is formed and it is difficult to discharge the viscous substances.
The dewatered sludge is spread in the building and fermentation is performed while turning over with a grab bucket or shovel using an overhead crane. This requires a lot of space,
A large-scale deodorizing device was required, and a large amount of equipment cost was required.

[0003] Therefore, fermentation and drying were promoted by stirring in a straight-body or reverse-tapered storage tank and aeration from the outer wall to try to eliminate the bridge, but air was sent from the outer wall to the inside. However, there is a problem that it is difficult to perform the stirring, and a large amount of power is required for a large amount of stirring.

[0004]

SUMMARY OF THE INVENTION The present invention promotes fermentation and drying of dewatered sludge and the like, reduces the risk of forming a bridge in the storage tank, takes up little space, and has a simple structure of a multistage storage tank for fermentation and drying. The purpose is to gain.

[0005]

In order to achieve the above object, the present invention provides an upright cylindrical storage tank provided in a machine frame, and a plurality of tables provided inside the storage tank. An opening and an outer peripheral dropping opening are formed alternately in upper and lower stages, and a center rotating blade and an outer feed rotating blade are alternately provided in upper and lower stages on an upper surface of a table, and a material formed on a lower surface side of each table An aeration nozzle is provided in a downward-cone space or an inverted-cone space , and a discharge port is provided in the lower part of the storage tank , and the volume between the tables is higher.
Constituted by Runishitagai sequentially reduced multistage savings tank above Symbol multistage tank of the first shot bright wherein providing the evaporated moisture removal and deodorization duct at the top of the reservoir formed by.

[0006]

According to the present invention, a viscous material 11 such as dehydrated sludge is supplied from the upper end supply port 12 of the upright cylindrical storage tank 2, and the centered rotating blades 6 and the outer feed rotating blades 7 on the tables 3, 3 'are moved as described above. When rotated about the center line of the storage tank 2, the first to the second
The distance between tables 3 and 3 'increases as going to 5 tables
Material 1
1 is sequentially filled from the bottom. The material 11 deposited on the first table 3 ′ is sent to the outside and dropped and deposited on the lower second table 3 from the outer peripheral drop opening 5 to form a repose angle θ to form the first table 3 ′. A downward conical space s is formed on the lower surface side of, and is deposited on the second table 3.

On the second table 3, the centered rotating blades 6
The material 11 is brought to the center by the rotation of the material, falls from the central drop opening 4 and deposits on the third table 3 ′, and the angle of repose θ
Form an inverted conical space s ′.

Further, on the third table 3 ', a downward conical space s is formed on the lower surface side similarly to the first table 3'.
The material 11 is placed on the fourth table 3 from the outer peripheral drop opening 5.
From the central drop opening 4 and onto the fifth table 3 ′ to form a downwardly-facing cone-shaped space s on the lower surface side, and further discharged from the outlets 9, 9 to the outside of the machine. .

On the tables 3 and 3 ', the deposited material 11
Is rotated and stirred by the rotating blades 6 and 7, and the lower table 3 or 3 ′ is dropped from the center and outer peripheral drop openings 4 and 5.
The fermentation and drying are promoted and the viscosity is reduced by the air supplied from the aeration nozzles 8 provided in the spaces s and s' at the same time as being dropped and stirred.

The evaporated water and odor are sent to a deodorizer from a duct 10 provided in the upper layer of the storage tank 2.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An upright cylindrical storage tank 2 is supported on a machine frame 1 established on a floor 13, and a discharge port 9 is provided at a lower end thereof through a discharge device 14.
9 are provided. A material supply port 12 is provided at an upper end,
The dewatered sludge material 11 is provided in a plurality of stages (five stages) inside the storage tank 2.
The table 3, 3 'for supporting the stack
2 (a) and 2 (b), and the first table 3 'at the top is dropped on the outer periphery as shown in FIG. 2 (a).
A drop opening 4 is formed in the center of the second table 3 as shown in FIG. Also, the third table 3 'is formed on the outer periphery, the fourth table 3 is formed on the center part, and the fifth table 3' is formed on the outer circumference with the drop openings 4, 5 alternately, and as going from the first table to the fifth table. Since the distance between the tables 3 and 3 'is large and the volume between the tables is sequentially large, the material 11 is sequentially filled from the bottom.

An upright rotary shaft 16 that rotates in the direction of arrow a (FIG. 2) along the center line of the storage tank 2 is provided, and the rotary blades 6, 7 are mounted on the rotary shaft 16 via bosses 17. 3 'is provided in contact with the upper surface. The rotating blades 7 of the first, third and fifth tables 3 'rotate in the direction of arrow a as shown in FIGS.
And the material 1 on the table 3 'by the slope 7'
2 can be stirred up and down, and the rotating blades 6 of the second and fourth tables 3 rotate in the direction of arrow a as shown in FIG. Can be centered.

Material 1 is placed on the lower surface of each of the tables 3, 3 '.
An aeration nozzle 8 is opened in the spaces s, s ′ formed by the angle of repose θ of 1, and outside air (warm air or cold air) is blown from the nozzle 8 to ferment and deposit the deposited material 11 or the dropped material 11 on the table. Can be dried.

The uppermost portion of the storage tank 2 is covered with a cover 18, and the cover 18 has a duct 1 for removing evaporated moisture and a deodorizing duct.
0, and the duct 10 is provided with a suction device (not shown) such as a blower. 19 in the figure
Is a deceleration drive motor for the upright rotary shaft 16 provided on the upper end plate of the storage tank 2, 20 is a material loading conveyor, 21 is an aeration nozzle facing the discharge device 14, and 22 is a transparent viewing window.

[0015]

According to the present invention, as described above, the viscous material 11 such as dewatered sludge is charged into the storage tank 2 and sufficiently stirred, and sufficient air can be supplied to the fermentation tank for dewatered sludge. It has the effect that it can be easily used as a dry storage tank without taking up space, and it can be used simply and cleanly without a bridge.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a multistage storage tank of the present invention.

FIG. 2A is a plan view taken along the line AA of FIG. 1;
(B) The figure is a plan view along the line BB in FIG.

FIG. 3 (a) is a longitudinal sectional view taken along the line CC of FIG.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 machine frame 2 upright cylindrical storage tank 3, 3 ′ table 4 central dropping opening 5 outer dropping opening 6 centering rotating blade 7 external feeding rotating blade 8 aeration nozzle 9 discharge port 10 duct for removing evaporated moisture and deodorizing

────────────────────────────────────────────────── (5) References JP-A-59-228997 (JP, A) JP-A-56-68386 (JP, A) JP-A-56-76297 (JP, A) JP-A 61-228 136979 (JP, A) JP-A-53-62674 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) C02F 11/02

Claims (2)

(57) [Claims] 1. An upright cylindrical storage tank is provided in a machine frame, and a plurality of tables are provided inside the storage tank. In these tables, a central drop opening and an outer drop are formed alternately in upper and lower stages. In the upper surface of the table, the center rotating blades and the outer feeding rotating blades are provided alternately in the upper and lower stages, and the downward cone space or the inverted cone space of the material formed on the lower surface side of each table.
An aeration nozzle is provided between the storage tanks, and a discharge port is provided at the lower part of the storage tank.
A multi-stage storage tank that gradually decreases as it becomes smaller. 2. The multi-stage storage tank according to claim 1, wherein a duct for removing evaporated water and a deodorizing duct are provided above the storage tank.