JPS5830275B2 - Method and device for removing foreign substances in a fermentation tank - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a foreign matter removal device in a fermentation tank that removes foreign matter mixed in during the process of fermenting organic solid waste and composting it, and the device. .

Composting of organic solid wastes (hereinafter referred to as raw materials) such as household waste, household excreta, and various industrial wastes is attracting attention from the perspective of effective resource use and non-polluting processing, and it is becoming increasingly important to produce high-quality compost. There is a need for a device that can produce 100% of the total amount, has low equipment costs, and is easy to operate and manage.

However, in conventional equipment, foreign substances mainly in the form of synthetic resin films and strings (hereinafter referred to as foreign substances) mixed in the raw materials cause various obstacles in the composting process, causing the above-mentioned problems. Request not fulfilled.

That is, it has the following drawbacks.

(2) In order to reduce the rate of foreign matter contamination in the compost product, a foreign matter separation device is required not only before the fermentation process but also after the fermentation process, increasing the overall equipment cost.

2. For raw materials with high moisture content and high viscosity, such as household waste, the efficiency of separating foreign substances in the pre-fermentation process is poor, so it is difficult to separate them during the fermentation process or post-separation process. In this case, foreign matter may get wrapped around or entangled with the rotating parts, sliding parts, etc. of the equipment, resulting in loss of power or reduction in the operating rate of the equipment, which poses a problem in operation management.

3. In order to maintain the agitation conveyance ability of the agitation device, it is necessary to periodically manually clean foreign matter adhering to the scraping member of the agitation conveyor, and it has also been proposed that the agitation device itself be equipped with a cleaning device. However, no method has been found that fully demonstrates its performance, and this method has the disadvantage that the removed foreign matter re-enters the raw materials in the fermenter.

An object of the present invention is to provide a method and apparatus for removing foreign substances in a fermenter, which can efficiently remove foreign substances mixed in raw materials with a small amount of power in order to improve the above-mentioned problems.

In Figure 3, which explains one embodiment of the present invention with reference to the drawings, 1 is a fermentation tank, which is made of concrete, concrete blocks, steel plates, or a combination of plywood and shaped steel, and is shaped like a vertical box. It is formed.

One end of the fermentation tank 1 constitutes a raw material input section 4, and a cleaning device 5 is provided at the other end.

A foreign matter discharge chute 6 is provided at the bottom of the fermentation tank 1 and below the cleaning device 5, and a compost discharge chute 7 adjacent thereto is configured to discharge the fermented product, ie, compost, to the input section 4 side. .

Guide members for rails 2, 2 are laid on the upper surfaces of both walls in the longitudinal direction of the fermentation tank 1, and a stirring device 3 is movably mounted on the rails 2, 2 via wheels 8. The wheels 8 are driven by the traveling drive device 10 above.

11 is a stirring conveyor for stirring and conveying raw materials;
A drive shaft 13 pivoted on a blanket 12 fixed to the lower surface of the truck 9, a frame 16 rotatably supported on the drive shaft 13, a driven shaft 19 pivoted on the tip of the frame 16, and a drive It consists of a plurality of transition zones 20 stretched endlessly between a wheel 13' fixed to the shaft 13 and a wheel 19' fixed to the driven shaft 19.

The drive shaft 13 is driven in forward and reverse directions by a motor 14 on the trolley 9, and has one end fixed to a proper position on the frame 16 and the other end wound around a drum 17. Alternatively, the stirring conveyor 11 is unwound and the tip of the stirring conveyor 11 is raised or lowered using the drive shaft 13 as a support shaft.

A raw material scraping member 21 is attached to the outer surface of the transition zone 20 with one side of an angle-shaped member perpendicular to the outer surface.
A plurality of them are arranged in parallel over the entire circumference of the transition zone 20 at regular intervals.

The scraping member 21 includes a thin protruding member 22 with a sharp tip that has both the raw material scraping function and the foreign matter separating function.
are installed in large numbers at predetermined angles in the lifting direction.

The projection members 22 may be attached to the raking members 21 in whole or in part.

Furthermore, longer protruding members 23 may be attached to some of the scraping members 21 instead of the protruding members 22.

In FIG. 2, the raking members 21 with long protruding members 23 attached are arranged every few raking members 21 with protruding members 22 attached, but conversely, the raking members 21 with long protruding members 23 attached are placed every few raking members 21 with protruding members 22 attached The number of raking members 21 may be increased, and the raking member 21 with the protruding member 22 attached and the long protruding member 2
The attachment distribution of the scraping member 21 to which the scraper 3 is attached to the transition zone 20 is determined in accordance with the state of the raw material and the foreign matter mixed in the raw material so that the foreign matter can be efficiently removed.

The side protrusion members 22 and 23 have a diameter of 6 as shown in FIGS.
The tip of a round steel bar or the like of about mvt to 12 degrees is cut at a tip angle A of 20° to 30°, and the inclination angle B is 35° to 40° so that the cut surface faces outside of the scraping member 21.
It is attached to the scraping member 21 at an angle of 5°.

The interval between the projection members 22, 23 and the scraping member 21 should be determined depending on the particle size of the raw material and the size of foreign matter mixed in the raw material, but is usually about 40 mm to 60 mm.

Next, the cleaning device 5 includes a brush roll 24 rotatably supported between both side walls of the fermentation tank 1, and a drive device 25 that rotationally drives the brush roll 24 via a chain or the like.

The brush roll 24 is made by attaching synthetic resin or elastic wire such as piano wire in multiple stages radially by embedding it into the roll, and when the stirring conveyor 11 is reversely rotated, the scraping member 21 moves linearly. The wire rod of the brush roll 24 and the protruding member 22.2 are placed at the position immediately after the rotational movement changes from the wheel 13' of the drive shaft 13 to the wheel 13' of the drive shaft 13.
3 are arranged so that they are almost perpendicular to each other, that is, in the state shown in FIG. 4.

Incidentally, instead of the cleaning device 5, a simple fixed comb blade-like device may be used.

The operation of the foreign matter removal device in the fermenter according to the present invention will be explained.

The raw material is supplied to the raw material input section 4 of the fermentation tank 1 by a conveyor or the like, and the stirring device 3 is introduced into the input section 4 from the compost discharge chute 7 side.
By repeating the operation toward the side, the raw materials are stirred and
While being mixed, aerated and composted, it is sequentially conveyed and discharged as compost from the compost discharge chute 7.

The stirring device 3 has a stirring conveyor 1 as shown in FIG.
1 is tilted downward toward the input section 4 side of the fermenter 1,
While being rotated by the motor 14 in a counterclockwise direction in the figure, the traveling drive device 10 moves the compost over the rails 2, 2 from the compost discharge chute 7 side to the input section 4 side.

The raw material in the tank is mainly scraped up by the scraping member 21 and dropped backward to carry out agitation and conveyance of the raw material.

The protruding members 22 and 23 attached to the scraping member 21 mainly have the function of crushing the raw material and removing foreign matter, but since they are provided integrally with the scraping member 21, they also have the function of stirring and transporting the raw material.

In particular, the long protruding member 23 has a sharp tip and is attached at an angle in the raking direction, and is also longer than the protruding member 22 to mainly have the function of removing foreign matter, so that foreign matter in the raw material is concentrated. It is attached to this long protruding member 23 and captured.

The attached foreign matter is always removed from the protruding member 22 during the stirring operation.
．． Since it is pressed towards the root of 23, it is difficult to separate.
During the stirring and conveying process, foreign matter accumulates on the projections 22,23.

After the stirring device 3 reaches the input section 4, the operation of the conveyor lifting device 15 raises the stirring conveyor 11 to a nearly horizontal state, and the rotation of the stirring conveyor 11 is stopped.

Next, the stirring device 3 is moved back to a position where the outer periphery of the brush roll 24 of the cleaning device 5 and the scraping member 21 of the stirring conveyor 11 substantially abut, and then stopped.

Then, the stirring conveyor 11 is rotated in the opposite direction to the stirring operation, and the brush roll 24 is driven in the direction opposite to the rotation of the stirring conveyor 11, that is, in the circumferential direction with respect to the rotating shaft as shown by the arrow in FIG. The protruding member 22.2 of the scraping member 21 is rotated by the device 25 during the stirring process.
3. Efficiently scrape off foreign substances that have adhered to and been transferred.
The foreign matter is discharged from the foreign matter discharge chute 6.

After removing foreign matter, the operation of the stirring device described above is repeated as appropriate.

As described above, the present invention actively utilizes the phenomenon of foreign matter adhering to the scraping member, which is a problem with conventional equipment, and removes foreign matter mixed in the raw material. The following is a description of its effects.

(1) The tip of the long protruding member attached to the scraping member first passes through the material deposited on the front side of the stirring conveyor, and foreign matter mixed in the raw material is concentrated on the long protruding member and captured. Therefore, foreign matter can be effectively removed, and the stirring and conveying function of the scraping member and the short protruding member can be fully demonstrated.

(2) The raw materials deposited on the front surface of the stirring conveyor are loosened in advance by the long protruding members, so that they are easily disintegrated and are efficiently stirred and conveyed.

(3) In conventional equipment, raw materials that are difficult to transport and are interposed between the tank bottom and the scraping member gradually solidify and form a layer, which is an obstacle to forced ventilation from the tank bottom. According to the method, this problem is solved because the long protruding member loosens the foreign material and removes the foreign material at the same time.

(4) The protruding member attached to the raking member has a thin shape with a sharp tip, and is attached at an angle with respect to the raking direction, so foreign objects may stick during stirring.
In addition, foreign matter can be efficiently separated because it is easy to get entangled and difficult to fall off during stirring.

(5) The cleaning device rotates the stirring conveyor in the opposite direction so that the wire is perpendicular to the protruding member, and the scraping member changes from linear motion to rotational motion at the wheel portion, so that the tip speed of the protruding member rapidly increases. Foreign matter is easily removed and falls off.

Note that if the brush roll of the cleaning device is rotated in the opposite direction to the rotational direction of the scraping member during agitation, the cleaning effect of the scraping member is further enhanced in conjunction with the rotation of the brush roll.

(6) In the fermentation tank, a foreign matter discharge chute is installed below the cleaning device, and a compost discharge chute is installed adjacent to this on the side of the raw material input section, so that foreign matters and the product compost can be separated. can be discharged outside the tank.

According to the present invention, foreign substances mixed in the raw materials can be easily separated and captured using a simple device during the stirring and conveying process of the fermentation treatment process, and removed at the end of the fermentation tank, so the overall equipment cost is low. Furthermore, it is possible to produce compost, which is a high-quality product with a low foreign matter contamination rate.

[Brief explanation of drawings]

FIG. 1 is a schematic vertical side view of the entire fermentation processing apparatus according to the present invention, FIG. 2 is a schematic vertical side view of the stirring device, and FIG. 3 is a schematic vertical side view of the stirring device shown in FIG. FIG. 4 is a schematic longitudinal sectional view showing the relationship between the brush roll and the protruding member during foreign matter cleaning.
Fig. 5 is a plan view of the raking member to which the protruding member is attached, Fig. 6 is a side view of Fig. 5, and Fig. 7 is a side view of the raking member to which the long protruding member is attached. . 1... Fermentation tank, 3... Stirring device, 5.
... Cleaning device, 6 ... Foreign matter discharge chute, 7 ... Compost discharge chute, 11 ...
Stirring conveyor, 20... Transition zone, 21...
... Raking member, 22...Protrusion member, 23.
...Long protruding member, 24...Brush roll.

Claims (1)

[Claims] 1. In a composting process using a fermentation tank using organic solid waste as a raw material, foreign matter mixed in the organic solid waste is removed by a member provided in the transition zone of the stirring device during the stirring and conveying process. The adhering, separated and captured state is transferred to one end of the fermentation tank, and the transition zone of the stirring device at one end of the fermentation tank is rotated in the opposite direction to that during stirring and conveyance, and the transition zone changes from linear motion to rotational motion. A method for removing foreign matter in a fermentation tank, characterized in that foreign matter adhering to the transition zone is removed by a brush roll provided immediately after the fermentation zone and rotating in the same direction as the transition zone. 2. A stirring device is mounted on both side walls of a fermentation tank in which organic solid waste is composted so as to be movable along a guide member, and a transition zone is driven in both forward and reverse directions at the bottom of the cart of the stirring device.1 The drive shaft is attached to the shaft, a raking member is provided in the transition zone, a protruding member is attached to at least some of the raking members so as to be inclined in the raking direction, and an endless shape is formed between the driving shaft and the driven shaft. A fermentation system characterized in that the transition zone is rotatable about a drive shaft, and a brush roll and a foreign matter discharge chute are disposed at one end of the fermentation tank to be driven in the same direction as the transition zone. Foreign matter removal device in a tank. 3. A device for removing foreign matter in a fermentation tank according to claim 2, wherein the entire scraping member is provided with a projection member. 4. A device for removing foreign matter in a fermenter according to claim 2 or 3, in which a portion of the protruding member is a long protruding member.