JPS6146437B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fermentation device for composting organic matter such as municipal waste, sewage sludge, and livestock waste.

Normally, such organic matter composting and fermentation operations involve storing the material (composting raw material) for a certain period of time, and during this period, stirring at appropriate time intervals while supplying an appropriate amount of air from the floor surface, so-called turning back. This is done by promoting aerobic fermentation. Also, depending on local weather and environmental conditions, open storage may be performed and air supply from the floor may be omitted. This operation is essential for reasons such as homogenization of air flow, uniformity of aeration, and substantial expansion of the aeration surface area.

On the other hand, in order to make the composting operation continuous, a function is required to move the material in a fixed direction at the same time as stirring for the above-mentioned turning operation. For this reason, modern composting equipment has a stirring device that can stir and move at the same time, but as the composting equipment becomes relatively large, the amount of material stored becomes enormous. Conventionally, this agitation device was extremely large-scale, and the construction cost accounted for a large proportion of the entire composting device, resulting in high costs.

In order to eliminate the above-mentioned drawbacks of the conventional technology, the inventors made the invention after repeated research, and first applied for patent application No. 54-87576.
The application was filed at . The present invention relates to an improvement on the invention of the above-mentioned application, and particularly relates to a large-scale, large-capacity composting device, and aims to downsize the device and provide an effective fermentation effect.

The invention of the above-mentioned application is a compact stirring device that has the function of stirring and moving materials at the same time, which has almost no relation to the amount of stored materials, and this stirring device is used for accumulating compost raw materials. In the field, the material is stirred and moved while being moved along a zigzag trajectory in directions substantially perpendicular and parallel to the direction of compost movement.

The outline of the previously filed invention will be explained with reference to FIG. 1. Reference numeral 10 is a fermentation tank in which compostable material is deposited. 11 is a passage partitioned off by partition walls 9; One end of the fermenter 10 is a material inlet end 7, and fermentation is carried out while gradually moving the entire composted material in the fermenter 10 along the direction of compost movement shown by arrow 2 toward the other material outlet end 3. This is to advance the process.

Reference numeral 1 indicates a stirring device having the function of moving the material in the direction of arrow 2. The stirring device 1 starts its movement from a starting point 4 in the vicinity of the material outlet end 3 and is indicated by arrows 5 and 5' approximately perpendicular to the direction of movement 2 of the material and parallel arrows 6 and 6'. When the material moves along a zigzag trajectory as shown in FIG.
The entire movement is completed in the direction of . Having reached the end point 8, the stirring device 4 returns in the direction of the arrow 12 through a passage 11 (in which no material is present) separated from the fermentation tank 10 by a partition 9 and reaches the starting point 4 again.

However, when planning a large-capacity facility such as this, for example around 500 tons/day, several fermenters will be required, resulting in a huge amount of equipment, and the construction and operating costs will be enormous. .

In order to solve this problem, the present inventors came up with the idea of providing a plurality of traversing bodies each equipped with a stirring device, and having the stirring device of each traversing body share the stirring range. , the present invention was made.

The object of the present invention is to provide a compost fermentation device that can reduce the scale of the fermenter, simplify the equipment, and reduce construction and operating costs, especially in large-capacity devices. be.

The present invention provides a substantially rectangular composting raw material depository with a single story or multiple stories, one side of the deposit is an inlet end for receiving the raw material, and one side opposite to the inlet end is the depositing place. The inside is used as an outlet end for discharging the manufactured compost while moving in the direction of compost movement, and the space between the inlet end and the outlet end is reciprocated vertically in a direction approximately parallel to the direction of compost movement of the compost material. A plurality of traversing bodies are provided, which are provided so as to be movable in rows, and a plurality of traversing bodies are provided so as to be movable in a reciprocating manner and horizontally in a direction substantially perpendicular to the direction of compost movement along the longitudinally movable body, separated from each other. provided, each of the traversing bodies,
Equipped with a stirring device that has the function of locally moving the material a short distance in approximately the same direction by stirring, and the traversing range of each traversing moving body is such that part of the adjacent traversing range overlaps with each other. This is a compost fermentation device featuring:

The present invention will be explained with reference to the drawings based on examples.
FIG. 2 shows an example in which two transversely movable bodies are provided for one longitudinally movable body, and each transversely movable body is provided with stirring devices 1 and 1'.

The stirring devices 1 and 1' have the function of locally moving the material a short distance in the direction of the arrow 2 while stirring. Start moving these two stirring devices from the starting points 4, 4' near the material outlet end 3, and move the two stirring devices at right angles to the direction of compost movement (arrow 2) with arrows 5, 4'.
The movement in the direction of 5' is due to the movement of the transverse moving body, and is caused by the movement of arrow 6, which is parallel to arrow 2 (but in the opposite direction to arrow 2).
The movement 6' is performed by the movement of the longitudinally moving body, and by combining these and moving along a zigzag trajectory, all the materials are agitated and moved.

Here, the range assigned to the stirring device 1 is a range A with a width l ₁ which is more than half the width W of the fermenter 10, and a range B with a width l ₂ for the stirring device 1. , determine the movement range of each traversing moving body. At this time, if the distance between the two traversing bodies is constrained to be constant, the operation can be easily controlled. During the stirring operation, it is preferable that l ₁ +l ₂ >W so that the ranges of A and B overlap.

Having reached the end points 8, 8', the stirring devices 1, 1' release their mutual restraint, move separately to both sides, and return to the starting points 4, 4' through passages 11, 11', respectively. Or, put them together on one side and put them together in aisle 1.
1 (or passage 11').

In order to return the stirring devices 1, 1' from the end points 8, 8' to the starting points 4, 4' again, a lifting mechanism is provided on the traverse moving body to move the stirring devices 1, 1' to the height of the pile of materials in the fermenter 10. After lifting the material above, it may be passed over the material and returned.

With the above configuration, the stirring operation by the traversing moving body takes about half the operation time in FIG. 1. If the number of traversing bodies is increased, the time required for stirring can be shortened. Therefore, it is possible to stir and move a large amount of material within a limited working time, there is no need to increase the number of fermenters, the equipment is downsized, and construction and operating costs are reduced.

Next, the stirring devices 1 and 1', the vertical moving body and the traversing moving body, will be explained in detail.

3 and 4 show a front sectional view and a side sectional view, respectively, of the embodiment, in which fermentation tanks 10 are provided in two stages, upper and lower, in a building 14. On the runway of the wall of the building 14, there is a girder 15 as a vertically moving body that reciprocates vertically in a direction parallel to the arrow 2 pointing in the direction of compost movement.
is provided, and on top of it are two trolleys 16, 1 as traverse moving bodies that reciprocate and traverse in the direction perpendicular to the arrow 2.
6' is provided. A stirring device 1, 1' is suspended from each carriage 16, 16' by an arm 17, 17'. The stirring devices 1, 1' have the effect of locally moving the material by a short distance in the direction of the arrow 2 by stirring.

The floor of each stage of the fermenter 10 is provided with an appropriately divided air chamber 18, and air is supplied upward through holes in the floor. The material (composting raw material) is fed by a belt conveyor 19 to the material inlet end 7 of the upper fermenter 10 . In the figure, 20 indicates a material dispersion supply device.

By controlling the vertical and horizontal movement of the girder 15 and the carts 16 and 16', the stirring devices 1 and 1' are moved along the trajectory shown in FIG. Material outlet end 3 from 7
Move to. Similarly, in the lower stage, the material can be moved from the material inlet end 7 to the material outlet end 3 and taken out of the system by the discharge conveyor 21. In the illustrated example, the fermenters are provided in two stages, upper and lower, in order to reduce the site area, but it is of course possible to have three or more stages or a single stage. (In the above and following explanations, illustrations of driving devices such as the girder 15 and the carts 16 and 16' are omitted.) FIGS. 5 and 6 show a first embodiment of the stirring device 1. Fig. 5 is a perspective view, and Fig. 6 is a view taken along arrow P in Fig. 5, showing the state of stirring and movement of materials. The stirring device 1, 1' consists of a rotating paddle consisting of a horizontal shaft 22, 22' and blades 23, 23' projecting approximately in the radial direction thereof, and rotates in the direction of the arrow 24.
The stirring devices 1, 1' are suspended by arms 17, 17' from carts 16, 16' as transversely moving bodies, and the carts 16, 16' are longitudinally moving bodies capable of running longitudinally in the directions of arrows 12 and 6, 6'. It traverses above the girder 15 in the directions of arrows 5 and 5'. Trolley 16,1
6', that is, by moving the stirring devices 1, 1' in the direction of the arrow 5, the material is cut by the blades 23, 23', and at this time, the material pile height H is equal to the outer diameter D of the paddle.
If it is more than 1/2 times, preferably more than 1 times,
Due to the shielding effect of the material itself, the material
Jump over the paddle and locally move arrow 2 as shown in
The liquid is transported a short distance in the direction of the liquid, that is, stirring and movement in one direction are performed at the same time. Due to this cutting and splashing of the material, the material is finely granulated, significantly increasing the aerated surface area, and is slowly deposited, so that the air chamber 18 on the floor surface is
Aerobic fermentation is carried out uniformly and rapidly with little ventilation resistance.

The distance between the stirring devices 1 and 1' may be fixed electrically for the purpose of controlling the operation of the cart, but as shown in FIG.
The connection may be made mechanically, such as by connecting with stoppers 35, 35'. In this case, when moving in the direction of arrow 5' perpendicular to arrow 2 indicating the direction of compost movement, only the moving motor 36' of trolley 16' is used, and when moving in the direction of arrow 5, trolley 1 is used.
Only 6 moving motors 36 are used. Therefore, the mutual spacing of the stirring devices 1, 1' is equal to that of the stoppers 35, 3.
5' length. According to this method, interval control between two stirring devices, collision control,
In addition, control of limit switches incidental to these devices is simplified, and wiring costs, maintenance efforts, etc. can be reduced.

FIG. 8 shows a second embodiment of the stirring device 1, which is applied when the material pile height h is less than 1 times, preferably less than 1/2 times, the outer diameter D of the paddle.
In this case, when the paddle is rotated in the opposite direction to that in the first embodiment, that is, in the direction of the arrow 26, the material is cut by the blades 23 as the stirring device 1 moves in the direction of the arrow 5, as described above. However, the material is transferred under the paddle in the direction of arrow 2, as shown by dotted arrow 27.

According to the present invention, by using a plurality of traversing bodies, a large amount of material can be stirred and moved in a limited time, and by wrapping the traversing range, all the materials can be reliably distributed over the entire width of the fermenter. , it is possible to provide a compost fermentation device that can be moved according to the fermentation process, and can further reduce the scale of the fermenter, reduce the equipment, and reduce equipment and operating costs. It can have extremely great effects.

[Brief explanation of the drawing]

Figure 1 is a plan view of the movement trajectory of one stirring device.
2 to 8 relate to an embodiment of the present invention, in which FIG. 2 is a plan view of a movement locus, FIGS. 3 and 4 are a cross-sectional front view and a cross-sectional side view of the embodiment, respectively, and FIG. 6 is a perspective view of the agitation device, FIG. 6 is a view of the agitation device in the direction of arrow P, FIG. 7 is a perspective view with a stopper attached, and FIG. 8 is an explanatory view of another embodiment of the agitation device. 1, 1'... Stirring device, 2... Arrow, 3... Material outlet end, 4, 4'... Starting point, 5, 5'... Arrow,
6, 6'...arrow, 7...material inlet end, 8, 8'...
... End point, 9,9' ... Partition wall, 10 ... Fermentation tank, 1
1...Aisle, 12...Arrow, 14...Building, 15
...Girder, 16,16'...Dolly, 17,1
7'...Arm, 18...Air chamber, 19...Belt conveyor, 20...Dispersion supply device, 21...Discharge conveyor, 22, 22'...Horizontal axis, 23,2
3'...Wing, 24...Arrow, 25...Arrow, 26
...Arrow, 27...Arrow, 35, 35'...Stopper, 36, 36'...Motor.

Claims (1)

[Scope of Claims] 1. A substantially rectangular composting raw material depository is provided with a single story or multiple stories, one side of the deposit is an inlet end for receiving raw material supply, and one side opposite to the inlet end is An outlet end is used to discharge the produced compost while moving in the direction of compost movement in the pile, and a direction between the inlet end and the outlet end is substantially parallel to the direction of compost movement of the compost material. a longitudinally movable body disposed so as to be movable in a reciprocating and longitudinal direction, and along the longitudinally movable body, the transversely movable bodies disposed so as to be movable in a reciprocating and transverse direction in a direction perpendicular to the direction of compost movement are separated from each other; Each of the traversing bodies is equipped with a stirring device having a function of locally moving the material by a short distance in substantially the same direction by stirring, and the traversing range of each traversing body is A compost fermentation device characterized in that parts of the rampant areas overlap with each other. 2. The apparatus of claim 1, wherein the stirring device is a rotating paddle consisting of substantially radially projecting blades on a horizontal axis. 3. The device according to claim 1, wherein the traversing body is configured to hold the stirring device so as to be able to move up and down. 4. The device according to claim 1, wherein the mutual spacing of the traversing bodies is adjustable.