JPH0649630B2 - Fermenter operating method - Google Patents

Description

The present invention relates to a method for operating a composting fermenter for municipal solid waste, sewage sludge, livestock waste, agricultural waste, and other organic waste. .

[Prior art]

Composting of organic waste etc. is a normal material (composting raw material)
Is stored for a certain period of time, and during the period, the material is agitated at an appropriate time interval while supplying an appropriate amount of air from the floor surface, and the material is cut back to accelerate aerobic fermentation. In some cases, air supply from the floor is omitted, but stirring is an essential operation for the reasons such as homogenization of materials, homogenization of aeration, and substantial expansion of aeration surface area.

In order to carry out the composting operation rationally, it is desirable to have a function of transferring the material in a certain direction at the same time as the agitation, and for this reason, an agitation means having a rotating paddle capable of performing the agitation and the transfer at the same time is required. Inventions such as JP-A-58-45182 have been made.

According to the invention, a rotary paddle type stirring device having a function of transporting a material in substantially the same direction by stirring is moved along a zigzag-shaped trajectory having components in both a direction substantially perpendicular to the material transport direction and a parallel direction. By urging
All materials are stirred and transferred.

That is, the principle of such a composting operation will be described with reference to FIGS. 3 and 4. Reference numeral 1 denotes a rotary paddle type stirring device having both a function of locally transporting a material in the direction of arrow 2 by a short distance (referred to as a material moving distance) and a function of performing stirring. The stirring device 1 has a starting point 4 near the compost outlet end 3
The movement starts from arrow 5, and arrows 5 and 5'indicate the lateral movement that is substantially perpendicular to the compost transfer direction of arrow 2, and the arrow 6 that indicates a short distance movement in the vertical direction, which is the parallel direction.
And 6 ′ move along a zigzag trajectory as shown in the figure and reach an end point 8 in the vicinity of the material inlet end 7, all the materials are moved by the stirring operation of the stirrer 1 as described later. , Composting raw materials are J → discharge, I → J, H → I,
........, B → C, A → B are sequentially moved to complete the transfer of the entire amount in the direction of the arrow 2 by the material moving distance.

In this manner, the material agitating and transferring operation by the traverse direction movement of the rotary paddle type agitating device 1 is sequentially advanced in the direction opposite to the compost transferring direction indicated by the arrow 2, whereby the fermenter 1
The entire amount of the material in 1 is transferred with stirring, and is sequentially discharged from the compost outlet end 3 to the discharging device 14.

The stirrer 1 that has reached the end point 8 stops stirring, moves from the door 10 provided in the partition wall 9 to the passage 12 (there is no material) partitioned from the fermenter 11 by the partition wall 9, and the arrow 13
It returns to the direction of and reaches the starting point 4 again.

As shown in FIGS. 4 and 5, the stirring device 1 of the rotary paddle type is suspended on a body 21 that can run in the lateral direction of the fermenter 11 on a pedestal 20 that runs in the longitudinal direction of the fermenter 11. The rotary paddle 22 is configured to bounce and move the material in the direction of arrow 2 backward with respect to the longitudinal traveling direction (arrow 15) in the fermenter 11.

[Problems to be solved by the invention]

In such a conventional method, since the compost that is transferred to and accumulated at the final end (J in the illustrated example) is discharged in a relatively short time by the stirrer, the compost in the case of a large-capacity composting machine is the same. A discharge device with a hopper capacity and a motor capacity corresponding to the discharge amount is required, and the equipment cost and maintenance cost are high, and there is also the risk of bridge formation of the stored compost due to large accumulation on the hopper. There was a problem.

INDUSTRIAL APPLICABILITY The present invention solves the above problems of the conventional method, rationally controls the turning back operation of the composting raw material, reduces the volume of one-time discharge compost in a large-capacity compost facility, and reduces the size of the discharge device. It is intended to provide a method for operating a fermenter capable of enabling the above.

[Means for solving problems]

The present invention is a fermenter that performs composting while moving a stirring device in a fermenter in which a compost is deposited to agitate the compost, and transferring the compost from the material inlet end toward the compost outlet end. In the operating method, the region in the fermenter is divided into a plurality of parallel to the moving direction of the compost, and in each section, the stirring device and the moving direction of the compost from the outlet end side toward the inlet end side. It is a method of operating a fermenter characterized in that the compost is moved in a zigzag pattern in a direction perpendicular to the direction of movement of the compost, and the compost is transferred from the material inlet end to the compost outlet end for each section.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, the entire area of the fermenter 11 is filled with the material inlet end 7
It is divided into a plurality of blocks in parallel with the moving direction of the composted product from the to the compost outlet end 3. This division is not actually divided by partition walls etc., but is an area divided for driving operation,
In the illustrated example, it is divided into four blocks I to IV.

When the material is turned back and transferred by a stirring device (not shown), turning back is started from the compost outlet end of the I block, and the compost discharged at that time is discharged from the discharge conveyor 30.
Thus, the agitator cuts back to the material inlet end 7 of the I block while discharging it as shown by the arrow and accommodating it in the hopper 23, and the operation of the block is completed. Next, the stirrer returned to the compost outlet end 3 through the passage 12 was turned over and transferred in the same manner as in the II block, III block ...
Thus, the entire fermenter 11 is turned over.

Thus, the amount of compost discharged by the discharge conveyor by operating the stirrer for each block in the fermenter is that the shaded portion in FIG. 2 is discharged in one block of operation. Therefore, the amount of compost accumulated in the J section / the number of blocks is obtained, and the load applied to the discharge conveyor 30 is significantly reduced as compared with the conventional method. Therefore, the capacity of the composting device can be reduced.

〔The invention's effect〕

As described above, the present invention cuts the entire fermentation tank, without dividing the transfer uniformly, divides the fermentation tank into a plurality of parallel to the moving direction of the sediment, and zigzag the stirring device in each section. It is designed to move from the outlet end toward the inlet end and cut back into each section, and the compost in each section is sequentially transferred. Therefore, the volume of discharged compost once is reduced, and the bridge phenomenon in the hopper is reduced. It is possible to reduce the size of the discharge device and to reduce the facility cost and the maintenance cost, which is a beneficial effect.

[Brief description of drawings]

FIG. 1 is a plan view of a driving explanation showing an embodiment of the present invention, and FIG.
1 is an explanatory view of the discharge end portion of FIG. 1, FIG. 3 is a plan explanatory view showing a conventional example, FIG. 4 is a perspective view thereof, and FIG. 5 is a side view of a paddle type stirring section. 1 ... Stirrer, 2 ... Arrow, 3 ... Compost exit end, 4 ...
... Start point, 5,5 ', 6,6' ... Arrow, 7 ... Material inlet end, 8 ... End point, 9 ... Partition wall, 10 ... Door, 11 ... Fermenter, 12 ... Passage, 13 ...... Arrows, 14 ...... Ejection device, 15 ...... Arrows, 20 ...... Traffic stand, 21 ...... Body,
22 ... Rotating paddle, 23 ... Hopper, 30 ... Discharge conveyor.

Claims (1)

[Claims] 1. A fermenter for composting while moving a stirring device into a fermenter in which a compost is deposited to stir the compost and transferring the compost from the material inlet end toward the compost outlet end. In the operating method, the region in the fermenter is divided into a plurality of parallel to the compost moving direction, and in each section the stirring device from the outlet end side toward the inlet end side with the compost moving direction. A method of operating a fermenter, characterized in that the compost is moved in a zigzag pattern alternately in a direction perpendicular to the direction of movement of the compost, and the compost is transferred from the material inlet end to the compost outlet end for each section.