JPS6137237B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a method and device for composting organic matter such as municipal waste, sewage sludge, and livestock waste, and the present invention relates to a method and device for composting organic matter such as municipal waste, sewage sludge, and livestock waste, and the present invention relates to a device that can simultaneously stir and move materials. The purpose is to reduce the construction cost of composting equipment, especially large equipment.

Normally, such organic matter composting operations are carried out by 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 to perform so-called turning. 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 water, 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 (referred to as the direction of compost movement) at the same time as stirring for the above-mentioned turning operation. For this reason, almost all known modern composting equipment has an agitation device capable of stirring and moving at the same time, but as the composting equipment becomes relatively large, the storage capacity of the material is reduced. Due to its large size, conventional stirring devices have been extremely large-scale, and the construction cost occupies a large proportion of the entire composting device, resulting in high costs.

In view of the above, the present invention is designed to miniaturize and simplify a stirring device that has the function of stirring and moving materials at the same time, almost regardless of the amount of stored materials, and to facilitate the construction of especially large-sized composting equipment. The aim is to significantly reduce costs and reduce the site area. That is, the present invention moves a stirring device, which has the function of moving materials in substantially the same direction by stirring, along a zigzag trajectory having components in both a direction substantially perpendicular to and parallel to the moving direction of the material, and All materials are agitated and moved by returning them through a return path where no material has accumulated.

The present invention is a composting method in which composting raw materials are fermented and composted in a composting fermentation plant while being stirred and moved along the direction of movement of the composting raw materials from the raw material inlet end to the compost outlet end. In the method, a movable body is moved in a vertical direction parallel to the direction of movement of the composting raw material and a transverse direction perpendicular to the longitudinal direction in the fermentation field, and the movable body moves horizontally over a long distance in the transverse direction. The movement progresses by repeating movement and short distance longitudinal movement in the longitudinal direction and opposite to the direction of movement of the raw material, and is provided on the moving body while the movement is progressing, and A stirring and transferring mechanism in a caterpillar shape having a rotating direction parallel to the longitudinal direction of the moving body scrapes up the raw material in a plane parallel to the longitudinal direction of the moving body and causes it to fall to a distant position, thereby stirring the raw material. and the moving body moves along the raw material movement direction, and the stirring and moving operations of the raw material accompanying the horizontal reciprocating movement are made to sequentially go back in the opposite direction to the raw material movement direction from the outlet end to the inlet end, and the moving body moves along the raw material movement direction. A composting method characterized in that, after reaching the composting layer, the movable body is returned to the exit end by moving the movable body in a longitudinal direction through a return path provided along the deposited layer where no depositing has been carried out, and A substantially rectangular composting raw material storage area with ventilation means provided on the floor is provided in the chemical fermentation plant, one side of the storage area is used as an inlet end for receiving raw material supply, and one side opposite to the inlet end is an outlet end for discharging the produced compost while moving in the pile;
a longitudinal body guided to perform reciprocating longitudinal movement between the inlet end and the outlet end along the direction of movement of the composting material, the longitudinal body being guided in a direction substantially perpendicular to the longitudinal direction; A transverse body is stabilized to perform reciprocating transverse movement, and the transverse body is provided with a caterpillar-shaped agitation transfer mechanism having a rotation direction parallel to the longitudinal direction, and the transverse body is further provided with a stirring transfer mechanism in the form of a caterpillar having a rotation direction parallel to the longitudinal direction. , the composting apparatus is characterized in that a return passage is provided that prevents accumulation on the floor and allows the movement of the caterpillar-shaped agitation and transfer mechanism in the longitudinal direction.

In addition, in this specification, the term "fermenter" is not limited to one installed indoors, but also refers to one such as a compost storage area in an outdoor yard.

The present invention will be explained with reference to the drawings in accordance with embodiments. Fig. 1 is a plan view illustrating the principle of the present invention;
In the figure, reference numeral 1 indicates a stirring device that has both the function of locally moving the material by a short distance (referred to as material movement distance) in the direction of arrow 2, and the function of stirring. The stirring device 1 is equipped with a caterpillar-shaped stirring and transferring mechanism as described later, and the moving body consisting of the stirring device 1, the arm 17, and the cart 16 shown in FIGS. The movement starts from a starting point 4 near the end 3, and arrows 5 and 5' indicate movement in the transverse direction, which is approximately perpendicular to the compost movement direction of arrow 2, and movement over a short distance in the longitudinal direction, which is parallel. When the material moves along the illustrated zigzag trajectory formed by the arrows 6 and 6' and reaches the end point 8 near the material inlet end 7, all the material is stirred by the stirring device 1 as described later. With this moving operation, the entire amount of material is moved in the direction of arrow 2 by the material moving distance.

That is, by sequentially moving the compost material by stirring and moving the compost material by moving the stirring device 1 in the lateral direction in the opposite direction to the compost movement direction, it is possible to move the entire amount of compost material in the fermenter 10 while stirring it. can.

Having reached the end point 8, the stirring device 1 returns in the direction of the arrow 12 and reaches the starting point 4 again by a return movement through a return passage (no material present) 11 separated from the fermenter 10 by a partition 9.

2 and 3 show other examples of the movement locus of the stirring device 1, in which, in place of the arrows 6 and 6' in FIG. Fig. 3 shows the trajectory when the arrows 13 and 13' in the synthesis direction of the components are used, and Fig. 3 shows the trajectory when the arrow 6 in Fig. 1 is not moved, both of which are within the technical scope of the present invention. Of course, it is included.

According to the device of the above embodiment, the stirring device 1, which has the function of simultaneously stirring and moving materials, can move not only vertically but also horizontally, so that even if the device is small, it can Since it can function for all the materials in the fermenter 10, it can be downsized almost independently of the amount of stored materials, that is, the amount of the fermenter 10. As a result, even in large composting equipment, not only is the cost reduced by making the stirring device 1 smaller and lighter, but the moving device and lifting device for the stirring device are also greatly simplified and lighter. , the composting operation can be performed continuously, and the construction cost of the entire composting apparatus can be significantly reduced.

The present invention will be explained in more detail below with reference to Examples. Fourth
5 and 5 respectively show a front sectional view and a side sectional view of the embodiment, in which the fermentation tank 10 is provided in two stages, upper and lower, in the building 14, and has the function of moving the material in the direction of arrow 2. A case is shown in which the stirring device 1 is suspended from a truck 16 of an overhead traveling crane 15 by an arm 17. The floor surface of the fermenter 10 at each stage is provided with an appropriately divided air chamber 18, and air is supplied upward. The material (composting raw material) is fed by a belt 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 movement of the crane 15 and the trolley 16 in the longitudinal and lateral directions, the stirring device 1 is moved along the trajectory shown in FIGS. Move to material outlet end 3. 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 crane 15 and the trolley 16 are omitted.) FIGS. 6 and 7 show an embodiment of the stirring device 1, and FIG. is a perspective view, and FIG. 7 is a view taken along arrow Q in FIG. 6, showing the state of stirring and movement of materials. Stirring device 1
is suspended by an arm 17 from a trolley 16 on a crane 15. As shown in the figure, the stirring device 1 is composed of a caterpillar 29 having a protrusion 28 on its surface, and the caterpillar shape 29 moves in the direction of an arrow 30, i.e. Rotates in a direction parallel to the longitudinal direction of the moving body. By moving the stirring device 1 in the direction of arrow 5, the material is cut by the protrusion 28 and at the same time the material is cut by the caterpillar 29.
Due to the rotation, the material placed on the protrusion 28 is transferred in the direction of the arrow 2 along a path as shown by the dotted arrow 31. As shown in the figure, it is preferable that the upper part of the caterpillar 29 be inclined in the direction of movement of the material (in the direction of arrow 2) so that the material falls to a position away from the position where it was drawn.

In accordance with the present invention, the capacity of the agitator is reduced by moving the agitator not only longitudinally but also transversely to agitate and move the compost material over the entire area of the fermenter. Regardless of the storage amount, that is, the capacity of the fermenter, it can be made smaller and simpler, and a common unit can be used for fermenters of different capacities, and the stirring device can be There is no need for a mechanism to raise and lower the
The moving body can be made smaller and lighter, and since it is transported by a slow-speed caterpillar, it is possible to prevent the compost from becoming pulverized, and the composting operation can be performed in continuous operation.In particular, large composting equipment can be simplified and made smaller. It is possible to provide a composting method and an apparatus for the same, which can reduce the site area and significantly reduce equipment costs, and has extremely great practical effects.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a plan view, FIGS. 2 and 3 are plan views showing other examples of the movement locus of the stirring device, and FIGS. 4 and 5 are diagrams of the embodiment. FIG. 6 is a perspective view of the stirring device, and FIG. 7 is a view in the direction of arrow Q thereof. 1... Stirring device, 2... Arrow, 3... Material outlet end, 4... Starting point, 5, 5'... Arrow, 6, 6'...
Arrow, 7... Material inlet end, 8... End point, 9... Partition wall, 10... Fermentation tank, 11... Return passage, 12...
...Arrow, 13, 13'...Arrow, 14...Building,
15...Crane, 16...Dolly, 17...Arm, 18...Air chamber, 19...Belt, 20...
Distributed supply device, 21... Discharge conveyor, 28...
Protrusion, 29... Catapillar, 30... Arrow, 31
...Arrow.

Claims (1)

[Claims] 1. Stirring composting raw materials in a composting fermentation plant,
and a composting method in which the composting material is fermented and composted while being moved along the direction of movement of the composting material from the inlet end of the material to the exit end of the compost, wherein a moving body is placed in the fermentation field parallel to the direction of movement of the composting material. The movable body is moved in a longitudinal direction perpendicular to the longitudinal direction and in a transverse direction perpendicular to the longitudinal direction. A caterpillar-shaped agitation transfer mechanism that moves by repeating vertical movement over a short distance in the direction, is provided on the moving body during the movement, and has a rotating direction parallel to the longitudinal direction of the moving body. scraping up the raw material in a plane parallel to the longitudinal direction of the moving body and causing it to fall to a distant position,
The raw material is stirred and moved along the raw material movement direction, and the raw material stirring and movement operations accompanying the horizontal reciprocating movement are sequentially traced back from the outlet end to the inlet end in the opposite direction to the raw material movement direction, and the moving body A composting method characterized in that, after reaching the inlet end, the movable body is moved in a longitudinal direction through a return path provided along the deposited layer where no deposition has been performed, and returned to the outlet end. . 2 A substantially rectangular composting raw material storage area with a ventilation means provided on the floor is provided in the composting fermentation plant, one side of the storage area is the inlet end for receiving raw material supply, and one side opposite to the inlet end is provided. is used as an outlet end for discharging the produced compost while moving in the pile, and the composting material is moved back and forth in the direction of movement between the inlet end and the outlet end. a guided longitudinal body, the transverse body having a transverse body stabilized for reciprocating transverse movement in a direction substantially perpendicular to the longitudinal direction; A caterpillar-shaped agitation transfer mechanism having a rotating direction is provided, and further along the raw material depositing area,
A composting apparatus characterized in that a return path is provided that prevents accumulation on the bed and allows the movement of the caterpillar-shaped agitation and transfer mechanism in the longitudinal direction.