JPS6311318B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is applied to a fermenter for composting organic sludge such as sewage sludge or human waste treatment sludge to prevent harmful gases generated from the sludge from dissipating. This invention relates to a gas diffusion prevention device.

In the process of fermenting and composting organic sludge,
As is well known, a large amount of odorous gas is generated.
If this gas is released into the atmosphere, there is a risk of environmental pollution in the surrounding area. Therefore, in conventional fermentation facilities, a fermentation tank is installed in a building, and the gas in this building is led to a deodorizing equipment, and after being deodorized, it is released into the atmosphere. However, in order to effectively ventilate a large-volume building, a large amount of power is required, and large-capacity deodorizing equipment is required to deodorize a large amount of gas.

This invention enables the switching device to move in the vertical and horizontal directions of the fermenter in order to cut back the sludge contained in the fermenter, without causing any hindrance to the movement of the switching device.
It is an object of the present invention to provide a gas diffusion prevention device that can cover the upper part of a fermenter and prevent gas diffusion.

Next, an embodiment of the present invention will be described with reference to the drawings. The fermenter designated by reference numeral 1 in FIGS. 1 and 2 is a rectangular one with an open top surface, and the sludge to be treated is accommodated in a layer 2 of an appropriate height. It's summery. Air (oxygen) is supplied to the sludge layer 2 from an air supply port 3 located inside the sludge layer 2, and the action of this oxygen causes the sludge to ferment and become compost. In addition, the gas generated by fermentation is transferred to the fermenter 1.
is taken out through a plurality of exhaust ports 4 formed in the side wall of the body, and guided to a suitable deodorizing facility (not shown). The sludge to be treated is fed into the fermentation tank 1 from an openable/closable input port 5 by the action of a transport device 6 such as a conveyor, and the compost produced by fermentation is transferred to the fermentation tank on the opposite side from the input port 5. 1 is discharged by a discharge device 7, such as a conveyor, provided at the bottom of the container.

Further, while moving along the opening surface of the fermenter 1, a turning device 8 turns the sludge tank inside the fermenter 1 and at the same time sequentially moves the sludge tank from the end on the input port 5 side toward the top of the discharge device 7. It is provided. This switching device 8 consists of a frame that is movable in the length direction of a plurality of (five in this example) rails 9 that are installed between two adjacent rails 9 that are arranged parallel to each other at regular intervals. shaped car body 10
and a flight conveyor 11 supported by the vehicle body 10. The conveying surface of the flight conveyor 11 has a width that is slightly narrower than the distance between adjacent rails 9, and is inclined so that the front end is located diagonally below the rear end. Therefore, in the process of the vehicle body 10 moving forward (to the left in FIG. 1), a part of the sludge layer 2 is scooped up by the flight conveyor 11, and from the rear end, a portion of the sludge layer 2 is transferred from the rear end to the position behind the scooped up position. It is released so that it falls into position. As a result, the sludge layer 2
is turned back and sent backwards a predetermined distance. Further, when the vehicle body 10 moves in the backward direction (to the right in FIG. 1), the flight conveyor 11
rotates so that its front end is higher than the rail 9, and the flight conveyor 11 is housed within the cover 12.

Furthermore, in order to enable movement of the switching device 8 between a plurality of passages formed between mutually adjacent rails 9, a pair of bogie rails 13 extending horizontally orthogonally to the rails 9, and a pair of bogie rails 13 are provided. A moving trolley 14 movable along 13 is provided. The trolley rail 13 may be provided at the bottom of the tank. This moving truck 14 supports a pair of moving rails 15 that have a spacing equal to the spacing between adjacent rails 9 and extend in the same direction on the same plane as the rails 9. Therefore, when the moving truck 14 is positioned so that the moving rail 15 is placed on the extension of the pair of rails 9 that support the turning device 8, the turning device 8 is moved to the top of the moving truck 14. By moving the moving trolley 14 along the trolley rail 13 in this state, it is possible to support the turning device 8 on any rail 9. Under normal operating conditions, the switching is performed in the order that the switching device 8 is moved to the adjacent passage after making one reciprocation within each passage.

Further, a pair of covers 16a, 16b is provided for each passage so as to close the gap between each rail 9. Each cover 16a, 16b is constructed by inserting a rod 17 into the trough of a sheet folded into an accordion shape, and engaging rollers 18 supported at both ends of the rod 17 with the rail 9, as shown in FIG. In the extended state, each can expand and contract until it becomes approximately equal to the total length of the passage. In the passage where the switching device 8 is present, the connecting members 19 and 20 provided at the tips of the covers 16a and 16b are connected to connecting members 21 and 22 provided at both ends of the moving trolley 14, respectively. Therefore, the upper surface of this passage is covered by the pair of covers 16a, 16b and the cover 12 provided on the moving trolley 14. Moreover, most of the passages where the turning device 8 is not present are covered with the cover 16a, and since the composted sludge generates almost no odor, the vicinity of the discharge port may be left open. Also cover 16
It is preferable to provide a hanging portion at the end of a. The cover 16b may be fixed to the turning device 8 and supported slidably on the tank end.

In the gas diffusion prevention device configured in this way, the switching device 8 that moves along the rail 9 within the selected passage expands one of the covers 16a, 16b and contracts the other depending on the direction of movement. Move while moving. Therefore, the upper part of the fermenter 1 remains covered at all times, and the inconvenience of gas dissipating into the atmosphere does not occur.

When moving the switching device 8 that has completed the switching operation in a certain passage to an adjacent passage, the connections between the connecting members 19 and 21 and between the connecting members 20 and 22 are released on the moving trolley 14, and the switching device 8 is moved to the next passage. After moving, cover 16a, 16 of the passage concerned
The connecting members 19, 20 and the connecting member 21 provided in b.
It is necessary to form a new connection with 22. One means for obtaining this action is to construct one of the connecting members 19, 20 and 21, 22 with an electromagnet and the other with a piece of iron. Alternatively, an engaging member 23 as shown in FIG. 4 is attached to the tips of the covers 16a, 16b, and the turning device 8
The side engaging member 24 may be configured to be engaged and disengaged. Note that the reference numeral 25 indicates a locking member for holding the engaging member 23 in a predetermined position even after it is separated from the turning device 8 side, but the cover is not connected to the turning device 8. 16a,1
Inadvertent movement of 6b can be easily prevented by an electromagnetically or mechanically operated stopper of any configuration.

Further, instead of the bellows-shaped sheets, flat sheets wound on a shaft biased in the winding direction may be used as the covers 16a and 16b.

The covering sheet is preferably one having a certain degree of strength, such as a shutter often used at the entrance of a store, garage, etc. Since sludge is normally supplied about once a day, it is better to keep the sludge supply port closed during normal times.

For those equipped with a winder, the covering sheet may be interlocked by moving the turning device, but
Conversely, it may be linked to the movement of the covering sheet. Furthermore, the sludge is turned around once a day, but at this time, the sludge is lifted upward and crushed, which causes particular odor. However, according to the device of the present application, the odor does not emanate to the outside.

If the building is omitted, it is also necessary to provide drainage grooves or create a slope in the sheet to prevent rainwater from flowing into the fermentation tank. If sludge is supplied from above, the lower end of the sludge supply device should be widened like a skirt to prevent rainwater from falling directly during sludge supply.

As is clear from the above explanation, according to the present invention, since the inside of the fermenter body is always closed,
Exhaust efficiency can be increased and exhaust gas dissipated into the building can be prevented. Furthermore, since the fermenter body is always covered with a covering sheet, it is possible to omit the building and use the fermenter as an outdoor facility, and at the same time, it is possible to utilize solar heat, which has excellent effects such as making it possible to significantly reduce plant construction costs. play.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a gas diffusion prevention device according to an embodiment of the present invention, FIG. 2 is a schematic cross-sectional view taken along line A-A in FIG. 1, and FIG. FIG. 4 is a partially cutaway side view showing another mechanism for connecting the cover and the turning device. 1...Fermentation tank, 2...Sludge layer, 3...Air supply port,
4...Exhaust port, 5...Input port, 6...Transport device,
7...Discharge device, 8...Turning device, 9...Rail, 10...Car body, 11...Flight conveyor, 13...Rail for trolley, 14...Movement trolley, 15...Movement rail, 16a ,16b...
Cover, 19, 20, 21, 22... connection member,
23, 24... Engaging member, 25... Locking member.

Claims (1)

[Claims] 1 A plurality of rails extending parallel to each other along the open surface of the fermenter are arranged to form a plurality of passages located between mutually adjacent rails, and a switching device is provided to the rails so as to be movable within each passage. A moving trolley is provided for supporting the switch and moving the switching device from one passage to another by moving in a direction perpendicular to the rail, and further covering the upper part of each passage. A gas diffusion prevention device for a fermenter, characterized in that a pair of covers are provided that are movable along the rail, and a tip of at least one cover is detachably connected to the switching device.