JPH1121190A - Recirculating composting equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device in a compost device in which a raw material switching device 6 circulates along a loop-shaped fermenter 1, which can smoothly supply power to each drive unit of the compost device. SOLUTION: A pair of parallel walls 1a, 1a and a pair of semicircular walls 1b, 1b closing both ends of the parallel walls, respectively.
A carriage 2 is provided on the upper surface of a loop-shaped fermenter 1 having a reciprocating motion, and the cart 2 is provided with a device 6 for turning over the raw material in the fermenter.
And a supply tube 4 for the raw material is provided at the center of the circular portion of the turning device 6 at the turning center, and a slip ring 4b connected to each drive electric device of the fermenter is provided on the outer surface of the supply tube 4. Was. Power can be smoothly supplied to the continuous moving portion of the switching device 6, and the slip ring 4b is sealed against the raw material outside the supply cylinder 4, so that there is no corrosion or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to fermenting dewatered sludge discharged from wastewater treatment facilities such as sewerage treatment facilities,
The present invention relates to improvement of a fermentation device that returns to green farmland as compost.

[0002]

2. Description of the Related Art Conventionally, there are various types of fermentation apparatuses of this type, but the original type is a horizontal scoop fermenter. This type of fermenter is a rectangular fermenter, which supplies raw material whose water content has been adjusted by mixing the raw material and auxiliary materials or product compost at one end, and turning it off with moderate stirring for one or several days. The fermentation is carried out while being moved to the other end, and discharged as a product at the other end. As a modification of this, there is a type in which both ends are joined to form a loop as in the present invention, but there is also a type in which charging is performed in a range of a linear portion and discharging is performed at a point farthest from the charging portion. In addition, a scoop with a radial length from the center to the circumference is arranged in a circular fermentation tank, and the raw material is supplied to the whole surface or one place, mixed with the raw material being fermented and fermented for a certain period, and then the product is manufactured. There is also a method of taking out

[0003]

SUMMARY OF THE INVENTION The present invention relates to an improvement of the above-mentioned prior art in which a fermenter is formed in a loop. When the fermenter is configured in a loop and the device for turning the raw material circulates inside the fermenter, the power supply to the drive of the device is difficult, and it is especially possible to operate continuously for a long time in a tank with a bad atmosphere. Since the power is supplied to the device, the wiring and the like also require complete sealing.

[0004]

SUMMARY OF THE INVENTION The present invention relates to a composting apparatus in a loop-shaped fermenter, in which a turning-over device turns around at a turning center where the reversing direction is changed, and at the same time the turning center is turned. By connecting the power supply cable to the switching device at the same time, the above-mentioned problem is solved, and at the same time, the raw material is supplied at a position where the raw material supply unit does not move. This makes it possible to operate in a simplified manner.

That is, the gist of the present invention is that a loop is formed by a pair of parallel walls, a semicircular wall joined to the parallel walls closing both ends of the parallel walls, and an intermediate wall partitioning the parallel walls. A ferromagnetic tank is formed, and a bogie is provided on the upper surface of the parallel wall of the fermenter so as to be reciprocable. The upper end of the bogie extends from the center of the bogie toward the side wall of the fermenter. Puts a raw material switching device close to the bottom of the fermenter, sets up a raw material supply cylinder at the base end of the mounted switching device, and connects an electric power connected to a power source to an outer wall of the supply cylinder. A supply slip ring was attached, while a supply port for the raw material was opened above the center of one circular portion of the fermenter, and an air supply hole and a product outlet were opened at the lower part of the side wall of the fermenter. Things.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION A composting apparatus according to the present invention is configured as described above. To treat a raw material such as sewage sludge, the raw material is charged in a tank, and then a turning device is circulated. The fermented material is kept in the tank for a certain period while being turned over, fermented, and taken out from the lower outlet as a product. This switching device revolves around the inside of the tank, turns the raw material, agitates the raw material, and conveys the raw material to the outlet. On the other hand, the raw material is supplied into the tank from the raw material supply port in an amount corresponding to the product compost taken out.

That is, the apparatus according to the present invention is capable of continuously performing a series of processes of transporting the raw materials, taking out product compost, and replenishing the raw materials while turning over the raw materials in the tank to promote fermentation. It is. In the processing operation as described above, according to the present invention, power is supplied to the turning device via a slip ring at a raw material supply cylinder portion erected at the base end of the turning device located at the center of the bogie. Therefore, despite the reciprocating motion and the revolving motion of the switching device, there is no trouble such as dragging of the caterpillar or contact with the raw material, and the operation can be performed smoothly. In addition, the replenishment of the raw material is performed at the center of the circular tank part where there is no relative movement with the supply port at the location where the reversing device stops the reciprocating motion, so continuous supply while smoothly replenishing the raw material suitable for the product taken out. Processing operations are possible.

Conventionally, it takes about two weeks to compost sewage sludge and the like by fermentation, and this kind of recirculation type composting apparatus removes compost products from loaded raw materials while removing compost products. It was difficult to replenish and the batch operation was required to control the operation until the initially charged raw material was composted.However, in the present invention, various conditions for fermentation can be set by initially charging the raw material. For example, after about two weeks, while replenishing raw materials,
Continuous operation for removing compost products is possible. Hereinafter, the present invention will be specifically described with reference to the drawings.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, reference numeral 1 designates a fermenter according to the present invention, which comprises a pair of parallel walls 1a, 1a.
And a circular wall 1b joined to both ends to close both ends,
1b, and an intermediate wall 1c which is located between the parallel walls 1a and 1a and separates them, constitutes a loop shape in plan view. Reference numeral 2 denotes a carriage provided on the upper surfaces of the parallel walls 1a, 1a so as to be able to reciprocate.

Next, in FIGS. 2 to 4, reference numeral 3 designates a revolving gantry mounted on the trolley 2. The revolving gantry 3 is rotatable about the center of the trolley 2 and serves as an axis. A supply cylinder 4, a raw material distribution device 5, and a raw material switching device 6 are mounted on the tower. The supply cylinder 4 is provided upright above the base end of the distribution device 5, and has a hopper 4a provided at its upper end, and a slip ring 4b mounted on an outer wall thereof.

The distributing device 5 located below the supply tube 4 has a pair of paddles 5b and 5b having a lateral feeding action in the casing 5a and a paddle 5b on the bottom of the casing 5a. , 5b are provided with wide slits 5c in the direction along them. The upper edge of the switching device 6 faces below the slit 5c.

As shown in FIGS. 3 and 4, the switching device 6 lowers the bucket conveyor 6a below the distributing device 5 so that the lower end thereof is close to the bottom of the fermenter 1, and is used for scraping. Many buckets 6b are mounted. In FIG. 3, reference numeral 7 denotes a screw conveyor for supplying a raw material, 8 denotes a screw conveyor for taking out compost products, 8a denotes a chute for taking out, and in FIG. 4, 9 denotes a diffuser hole.

The composting apparatus according to the present invention is constructed as described above, and is capable of stirring and turning over the raw material loaded in the loop-shaped fermenter 1 while the turning-over device 6 circulates (circulates). Since the power supply to the drive source is performed by the slip ring 4b of the supply cylinder 4 located at the turning center of the switching device 6, there is no trouble such as dragging the cabin ear as in the conventional case. Slip ring 4b
Is provided on the outer wall of the supply cylinder 4 isolated from the raw material, so that it is not affected by corrosive gas or the like caused by the raw material at all.

Next, the raw material processing operation by the composting apparatus according to the present invention will be specifically described. First, about half the raw material sludge having a water content of about 35%, which is also referred to as seed compost, is loaded into the fermenter 1. Then, an appropriate amount of dehydrated sludge having a water content of about 80% is supplied onto the raw material to adjust the water content of the raw material in the tank to about 55%. The supplied sludge of about 80% is the moisture value of the raw dewatered sludge discharged from a dehydrator such as a belt press, which means that the sludge supplied to the fermenter 1 is specially adjusted for moisture and the like. There is no necessity, which means that raw sludge can be supplied as it is and the water content can be adjusted and fermented in the tank.

In this way, the raw sludge is supplied once a day for about 30 minutes into the tank in which the water content of the sludge in the tank is adjusted. The supply amount of the raw material sludge is an amount corresponding to the withdrawal amount of the product compost (fermented sludge) described later. The bogie 2 of the switching device 6 at the time of supplying the raw material sludge,
As shown by the two-dot chain line in FIG. 1, the vehicle stops at the circular portion on the right, and the revolving gantry 3 and the bucket conveyor 6a operate. That is, raw sludge having a high water content is mixed with the sludge in the tank, and adjusted to a water content suitable for fermentation.

When the supply of the raw material sludge is completed as described above, the carriage 2 is advanced as shown by the arrow A in FIG. 1 and at the same time, the bucket conveyor 6a of the reversing device 6 is operated, so that the front of the bucket conveyor 6a is operated. The raw material is scraped up from the bottom by the bucket 6b, thrown rearward and turned back. That is, as the turning-over device 6 advances as shown by the arrow A in FIG. 1, the raw sludge is conveyed as shown by the arrow B, and from the above-mentioned raw sludge supply position, as shown in FIG. The raw material in front of the start position of the switching device 6 shown in the drawing stays in the tank for the longest time (about two weeks), and the fermentation is completed. The raw material in this part is extracted as compost product. See arrow C in FIG.

In FIG. 1, when the bogie 2 reaches the left circular portion of the fermenter 1, the bogie 2 stops, and the swivel base 3 makes a half turn so that the turning device 6 turns the raw material in the circular bath. , The carriage 2 moves back and returns to the right circular tank portion, where the turning device 3 of the revolving gantry 3 turns the raw material of the portion, and the circulation cycle of the turning device 6 is completed. Thereafter, as described above, after the raw material sludge is supplied, the switching device 6 starts circulation. The supply of the raw sludge is performed once a day, and the circulation of the switching device 6 is performed once a day.
As described above, the supply amount is the amount corresponding to the amount of the product compost to be taken out, that is, the amount of raw sludge with a high water content corresponding to the amount of the fermented and dried product compost.

In the raw material processing operation as described above,
In the circulation process of the bogie 2, the revolving gantry 3, and the switching device 6 mounted on the trolley 2, the operations such as the operation and the stop are naturally performed automatically by a predetermined program. Of course, the (fermentation time), the number of times of turning over, etc. can also be changed to the properties of the sludge.

[0019]

As described above, the composting device according to the present invention is a type in which the turning device circulates through the loop-shaped fermenter, but the power supply mechanism for the circulating turning device and the raw material to the fermenter are provided. The sludge supply system has been devised to enable the smooth operation of each system and enable continuous sludge composting.It is superior in terms of facilities and operation compared to conventional compost systems. It has the advantages described above.

[Brief description of the drawings]

FIG. 1 is a plan view of a fermenter for explaining the operation of a turning device in a composting device according to the present invention.

FIG. 2 is a plan view of a portion of the switching device, which is partially cut away.

FIG. 3 is a partially cut away front view of the turning device.

FIG. 4 is also a side view of a portion of the switching device, which is partially cut away.

[Explanation of Signs] 1 Fermenter 1a Parallel wall 1b Semi-circular wall 1c Intermediate wall 2 Bogie 3 Revolving gantry 4 Supply cylinder 4b Slip ring 6 Switching device 9 Air diffuser

Claims (1)

[Claims] 1. A loop-shaped fermenter 1 comprising a pair of parallel walls 1a, a semicircular wall 1b joined to the parallel walls closing both ends of the parallel walls 1a, and an intermediate wall 1c partitioning the parallel walls.
A trolley 2 is provided on the upper surface of the parallel wall 1a of the fermenter 1 so as to be reciprocally movable. The upper end of the trolley 2 extends from the center of the trolley 2 toward the side wall of the fermenter 1, A raw material switching device 6 whose lower end is close to the bottom of the fermenter 1 is mounted thereon, and a raw material supply tube 4 is erected at the base end of the mounted switching device 6. To the power supply slip ring 4b connected to the power supply,
On the other hand, a raw material supply port is opened above the center of one circular portion of the fermenter 1, and an air diffusion hole 9 is formed at a lower portion of a side wall of the fermenter 1.
And a composting system with a product outlet.