JP2000247770A - Device for stirring raw material in fermentation tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fermentation device which has a fermentation tank formed in a loop-like shape on the planar view, rotates a plowing device in the fermentation tank and is used for sludge, or the like, capable of uniformly plowing a fermentation raw material even at a rotation portion. SOLUTION: In this fermentation device which is used for sludge, or the like and in which a plowing device is rotated in a fermentation tank 4 formed in a loop-like shape on the planar view, a scraper 3 whose end edge slides on the wall surface of the intermediate partition board of the fermentation tank 4 is disposed on the inside surface of the frame of the plowing device. The scraper 3 can prevent that a fermentation raw material forward thrown on the rotation of the plowing device is allowed to backward flow, thereby capable of uniformly plowing the fermentation raw material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of an apparatus for stirring a raw material in a fermentation tank for sludge or the like. In particular, in the present invention, the fermentation tank is formed in a loop shape, and the stirring apparatus is turned around a circular portion. It is an object of the present invention to provide an apparatus capable of uniformly stirring a raw material in a circular portion in a fermenter that needs to perform the process.

[0002]

2. Description of the Related Art Heretofore, there has been known an apparatus in which a scoop-type stirring device circulates in a fermenter configured in a loop shape when viewed in a plan view and transports and ferments the raw material in the tank while stirring.
JP-A-8-67588 is one such example. In Japanese Unexamined Patent Publication No. Hei 8-67588, a stirrer mounted on a bogie reciprocates in a linear portion of a fermenter and turns around an inner end of a circular portion.

[0003]

However, in the above-mentioned apparatus in which the stirring device operates and patrols the inside of the fermentation tank, the side wall of the fermentation tank and the frame of the stirring apparatus are required to move the stirring apparatus smoothly. There must be a gap between them. In particular, at a portion where the stirrer turns, the load applied to the scoop of the stirrer becomes unbalanced, so that a gap larger than that of the linearly moving portion is required.

Further, when the agitating device is swirled, the scoop throws the raw material at the center of the swirling toward the outer peripheral portion in the tank, so that a mortar-shaped recess is formed at the center of the swirling. The raw material that has been thrown toward the dent flows backward through the gap,
This is scooped up again and stirred. That is,
In the conventional apparatus, uniform stirring cannot be performed due to the deviation of the raw material and the backflow of the stirred raw material in the swirling part of the stirring apparatus.

[0005]

SUMMARY OF THE INVENTION The present invention is to completely prevent the backflow of the above-mentioned thrown raw material in the latter stage and to uniformly mix and mix the raw material. In a fermenter configured as a loop in a plan view, in a fermenter equipped with a scoop-type stirring device that circulates in the tank while scooping up the raw material at the bottom of the tank and throwing it backwards, the intermediate partition wall of the fermenter The center of rotation of the scoop-type stirrer is provided at the center line of the scraper, and a scraper is fixed to the inner machine frame of the scoop-type stirrer in a direction parallel to the center axis of rotation, and the inner edge of the scraper is positioned at the center. It is slid on the partition wall.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Since the apparatus according to the present invention is constructed as described above, the inner edge of the scraper slides on the intermediate partition wall when the agitator rotates, and the inner end face of the agitator and the intermediate partition are in contact with each other. Seal the gap between the wall. Therefore, the thrown raw material does not flow backward and remix, and the raw material can be uniformly stirred even in the swirling section. Hereinafter, the present invention will be specifically described with reference to the drawings.

[0007]

FIG. 1 is a side view of a stirring device according to the present invention. In FIG. 1, reference numeral 1 denotes an endless scoop belt having a large number of scoops 1a mounted thereon, and reference numeral 2 denotes left and right sides of the scoop belt 1. A cover 3 covering the inner and rear portions is a scraper attached to the cover 2 on the inner end side of the scoop belt 1, and its inner edge 3a has an intermediate partition wall of the fermenter 4 as shown in FIGS. 4a.

The upper end of the scoop belt 1 is wound around a drive shaft 5, which is connected to a drive 8 mounted on a swivel 7 by a chain 8a as shown in FIG. is there. The center of rotation of the stirrer A is located on the center line X of the intermediate partition wall 4a as shown in FIG.

The stirrer A according to the present invention is configured as described above, and circulates in a loop-shaped fermenter 4 as shown in FIG. 4 to scoop the raw material in the tank as shown in FIG. Raise
Throw it backwards and stir and transport at the same time. At this time,
In the revolving portion of the stirring device A, the raw material in the central portion of the rotation is thrown toward the rear outer peripheral portion, and a hollow is formed in the central portion of the swirl, and the raw material thrown toward the hollow forms a backflow. At this time, according to the present invention, since the scraper 3 is provided in the gap where the raw material flows backward, the backflow of the released raw material can be prevented.

[0010] That is, the swirling part of the stirring device A prevents the backflow of the thrown raw material, so that the whole of the fermenter 4 can be uniformly stirred. Since the scraper 3 is in sliding contact with the intermediate partition wall 4a even in the linearly moving portion of the stirring device A, backflow of the raw material is prevented, and uniform stirring can be performed at this portion.

[0011]

As described above, according to the apparatus of the present invention, in a fermentation apparatus having a scoop-type stirring device,
It is possible to obtain a homogeneous fermented product by completely preventing the backflow of the thrown raw materials, and to facilitate the management of the fermentation state.

[Brief description of the drawings]

FIG. 1 is a side view of a stirring device according to the present invention.

FIG. 2 is also a rear view of FIG.

FIG. 3 is a plan view of a part of the fermenter for explaining the operation of the stirring device in the swirling section.

FIG. 4 is a schematic plan view of a fermenter for explaining the operation of the stirring device.

FIG. 5 is a schematic side view of a scoop device for explaining a stirring state of raw materials.

FIG. 6 is a plan view of the scoop device of FIG. 5;

[Explanation of symbols]

 A stirrer 3 scraper 4 fermenter 4a intermediate partition wall X center line of intermediate partition wall

Claims (1)

[Claims] 1. A fermentation apparatus provided with a scoop-type agitating device A that circulates in a tank while scooping up the raw material at the bottom of the tank and throwing it backwards in a fermentation tank 4 configured in a loop shape when viewed in plan. The turning center of the scooping stirrer A is provided on the center line X of the intermediate partition wall 4a of the fermenter 4 and the inner machine frame of the scooping stirrer A is provided in a direction parallel to the turning center axis. An apparatus for stirring a raw material in a fermenter in which a scraper 3 is fixed and an inner edge of the scraper 3 is slid in contact with a wall surface of an intermediate partition wall 4a.