JP4092798B2 - Sedimentation tank equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a settling tank facility used in the process of treating sewage.
[0002]
[Prior art]
As an example of a conventional water treatment method adopting the activated sludge method, as shown in FIG. 4, raw water 2 such as sewage put in the raw water tank 1 is temporarily transferred to the flow rate adjusting tank 3, and then the flow rate The raw water 2 in the adjustment tank 3 is put into the aeration tank 4, where the raw water 2 and the activated sludge are mixed and stirred by blowing air through the air diffuser 5 to oxidize and decompose the organic matter in the raw water 2 into the activated sludge. After that, the raw water 2 is transferred to the sedimentation basin 6 together with the activated sludge, and the activated sludge is allowed to settle, and the filtered water 7 as the supernatant is recovered in the treated water tank 8 as treated water, There is something that is taken out through the sludge discharge pipe. 9 is a suction pump, 10 is a screen, 11 is a blower, and 12 is a dehydrator.
[0003]
As a settling tank facility having the settling tank 6, there is one as shown in FIG. 5. That is, a so-called circular sedimentation basin tank 16 formed of a reinforced concrete bottom plate 14 formed in a funnel shape and having a sludge pit 13 formed in the center and a reinforced concrete side wall 15 formed in a cylindrical shape is formed on the bottom plate 14. It is constructed so as to be buried inside, and the inside of the tank is set as a sedimentation tank 6.
[0004]
In the settling tank 16, a raw water inflow pipe 17 led from the aeration tank 4 shown in FIG. 4 is led to the position of the sludge pit 13 through the lower side of the bottom plate 14, and the raw water 2 is introduced into the settling tank 6. In addition, the sludge discharge pipe 18 is led from the position of the sludge pit 13 to the position of the sludge tank 19 provided outside the sedimentation basin tank 16 through the bottom of the bottom plate 14 and collected in the sludge pit 13. Furthermore, an overflow trough 22 is provided in the vicinity of the upper end of the side wall 15, and an overflow trough 22 that receives filtered water 7 overflowing from the overflow port 21 is provided at the upper end of the side wall 15. The filtered water 7 is sent from the overflow trough 22 to the treated water tank 8 shown in FIG.
[0005]
A support cylinder 23 provided with flow passages 23a and 23b through which the raw water 2 and sludge 20 can freely flow on the upper side and the lower side is disposed above the sludge pit 13 at the center in the settling tank 16. A platform 24 that extends horizontally at the upper end of the support cylinder 23, a motor 25 is installed on the platform 24, and the screw 26 that is rotationally driven by the motor 25 is supported by the above-described support cylinder 23. It arrange | positions in the pipe | tube 23, comprises the stirring apparatus 27, and the rotation of the said screw 26 raises the raw | natural water 2 which flowed in in the support pipe | tube 23 through the lower flow path 23b, and from the upper flow path 23a. It is made to flow out of the support cylinder 23.
[0006]
Further, a traveling carriage 28 is mounted on the upper end surface of the side wall 15 of the settling basin tank 16, and a frame 30 is passed between the traveling carriage 28 and a bearing 29 installed at the center of the platform 24. A scraping plate 33 is attached to the lower end of the scraping column 31 suspended from the intermediate portion through an arm 32 to constitute a mud collector 34, and the traveling carriage 28 is circumferentially driven by a traveling motor 28a. By traveling in the direction, the scraping plate 33 is rotated via the frame 30, the scraping column 31, and the arm 32, and the sludge 20 on the bottom panel 14 is scraped and collected in the sludge pit 13. .
[0007]
[Problems to be solved by the invention]
However, in the case of the above settling tank equipment, steel pipes, cast iron pipes, etc. are used as the raw water inflow pipe 17 and the sludge discharge pipe 18. The raw water inflow pipe 17 and the sludge discharge pipe 18 are the bottom plate of the settling tank 16. Maintenance is difficult due to the underground structure that passes under 14, especially when it is made of steel pipe, it is likely to cause corrosion, etc. if used for a long time, and repair is possible even if water leaks. This is extremely difficult, and as a result, the problem of causing ground subsidence due to water leakage is caused.
[0008]
Therefore, the present invention is intended to facilitate maintenance and repair of the raw water inflow pipe and the sludge discharge pipe.
[0009]
[Means for Solving the Problems]
In order to solve the above problems, the present invention constructs a sedimentation basin tank composed of a concrete bottom plate and side walls so that the bottom plate is buried in the ground, and the raw water inflow pipe and the sludge discharge pipe are by penetrating the side wall leads into the tank by crawl the bottom surface plate and pipe so as to position the tip in the center tank, and the upper surface of the bottom plate, the inner bottom plate by plain concrete, in the bottom surface plate and uniformly laying circumferentially becomes higher such thickness than the outer diameter dimension of the pipe has been water inlet pipe and the sludge discharge pipe, covers the water inlet pipe and the sludge discharge pipe with unreinforced concrete, the inner bottom plate The raw water inflow pipe and the sludge discharge pipe are housed inside.
[0010]
When maintenance or repair of the raw water inflow pipe or sludge discharge pipe is necessary, only the surface of the piping storage location on the inner bottom panel should be partially removed. As a result, the raw water inflow pipe and the sludge discharge pipe can be exposed, which facilitates maintenance and repair from the inside of the tank.
[0011]
Further, the housing of the water inlet pipe and the sludge discharge pipe to the inner bottom panel in advance water inlet pipe on the inner bottom plate, the piping accommodating recess having a space for accommodating the sludge discharge pipe formed respectively, the respective pipes for housing water inlet pipe into the recess, to house the sludge discharge pipe, the raw water in the fill material with is and filled with a filler in the gap between the pipe accommodating the recess and raw water inlet pipe and the pipe for housing the recess and the sludge discharge pipe by that to cover the upper surface of the inlet pipe and the sludge discharge pipe arrangement, without removing a portion of the inner bottom plate, if so removing only filler, exposing the water inlet pipe and the sludge discharge pipe The recovery work becomes easier.
[0012]
Further, instead of filling the piping storage recess with a filler, a lid is detachably disposed in the piping storage recess so as to close the piping storage recess, and between the piping storage recess and the lid. raw water by the inlet tube and configurations so as to house the sludge discharge pipe, it becomes possible to open and close the pipe receiving recess only detachable lid on.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0014]
1 (a) and 1 (b) show an embodiment of the present invention. In a sedimentation basin facility having a configuration similar to that shown in FIG. Both the raw water inflow pipe 17 and the sludge discharge pipe 18 that are intended to be buried inside are guided through the side wall 15 of the settling basin tank 16 into the tank, and are further turned over the bottom plate 14 to center the tank. The inner bottom plate 35 made of unreinforced concrete is placed on the upper surface of the bottom plate 14 so that the raw water inflow tube 17 and the sludge discharge pipe 18 are not directly exposed on the bottom plate 14. 17 and the sludge discharge pipe 18 are uniformly laid in the circumferential direction so as to be thicker than the outer diameter, and the upper surfaces of the raw water inflow pipe 17 and the sludge discharge pipe 18 are covered with unreinforced concrete in the inner bottom plate 35. The raw water inflow pipe 17 and the sludge discharge pipe 18 are So as to be accommodated.
[0015]
The raw water inflow pipe 17 and the sludge discharge pipe 18 may be fixed to the bottom board 14 when placed on the bottom board 14 or simply placed. Other configurations are the same as those shown in FIG. 5, and the same reference numerals are given to the same portions.
[0016]
Although the raw water inflow pipe 17 and the sludge discharge pipe 18 are disposed on the bottom board 14, the raw water inflow pipe 17 and the sludge discharge pipe 18 are accommodated in an inner bottom board 35 provided with a uniform thickness on the upper surface of the bottom board 14. The operation of the scraping plate 33 of the machine 34 is not hindered.
[0017]
When maintenance or repair of the raw water inflow pipe 17 or the sludge discharge pipe 18 is performed, the surface of the inner bottom plate 35 above the raw water inflow pipe 17 or the sludge discharge pipe 18 accommodated in the inner bottom plate 35 is partially removed. The raw water inflow pipe 17 and the sludge discharge pipe 18 are exposed in the settling basin 6. In this case, since the inner bottom board 35 is made of unreinforced concrete, it can be easily removed, and the raw water inflow pipe 17 and sludge can be removed by only partially removing the upper part of the raw water inflow pipe 17 and sludge discharge pipe 18. Since the discharge pipe 18 can be exposed, maintenance, repair, and renewal can be easily performed. Further, after the maintenance or repair is completed, it is only necessary to restore the removed portion with unreinforced concrete, so that the restoration work can be easily performed, which is advantageous in terms of cost.
[0018]
Next, FIG. 2 shows another embodiment of the present invention in which the raw water inflow pipe 17 and the sludge discharge pipe 28 are housed in the inner bottom board 35. When the inner bottom board 35 is laid, FIG. In addition, a pipe storage recess 36 having a space for storing the raw water inflow pipe 17 and the sludge discharge pipe 18 (only the raw water inflow pipe 17 is shown in the figure) is formed in advance, and the raw water in the pipe storage recess 36 is formed. The inflow pipe 17 and the sludge discharge pipe 18 are accommodated, and the gap 37 is filled with a filler 37 such as mortar.
[0019]
As shown in FIG. 2, when the raw water inflow pipe 17 and the sludge discharge pipe 18 are maintained and repaired, the inner bottom plate 35 itself is not broken, and only the filler 37 is removed to remove the raw water inflow pipe 17 and the sludge discharge pipe 18. Since it can be exposed, restoration work becomes easier.
[0020]
Next, FIG. 3 shows still another embodiment of the present invention. In the same configuration as that shown in FIG. A lid 38 such as an iron plate or resin is detachably disposed on the upper surface of the recess 36 so as to close the pipe storage recess 36 and accommodate the raw material inflow pipe 17 and the sludge discharge pipe 18. is there.
[0021]
As shown in FIG. 3, the concave portion 36 for pipe storage can be closed or opened by attaching and detaching the lid 38, so that maintenance, repair work and restoration work for the raw material inflow pipe 17 and the sludge discharge pipe 18 can be further performed. It can be done easily.
[0022]
In the embodiment of FIG. 2, the case where mortar is used as the filler 37 filled in the gap of the pipe housing recess 36 is shown, but other things such as urethane foam may be used, Of course, various changes can be made without departing from the scope of the present invention.
[0023]
【The invention's effect】
As described above, according to the sedimentation basin equipment of the present invention, the sedimentation basin composed of a concrete bottom plate and side walls is constructed so that the bottom plate is buried in the ground, and the raw water inflow pipe and sludge discharge are constructed. Pipe the pipe through the side wall and lead it into the tank so that the top of the bottom board is turned and the tip is located in the center of the tank, and the inner bottom board of unreinforced concrete is placed on the upper surface of the bottom board . and uniformly laying circumferentially thickness such that is higher than the outside diameter dimension of the bottom water inlet pipe is the pipe on the board and sludge discharge pipe, covers the water inlet pipe and the sludge discharge pipe with unreinforced concrete Since the raw water inflow pipe and the sludge discharge pipe are housed in the inner bottom plate, when the raw water inflow pipe and the sludge discharge pipe are maintained and repaired, these pipes are buried. You only need to partially remove the inner bottom of Furthermore, recovery is also becomes advantageous in terms of cost because it can be easily carried out, further, the housing of the water inlet pipe and the sludge discharge pipe to the inner bottom panel in advance water inlet pipe on the inner bottom plate, a sludge discharge pipe can hold to form a pipe receiving recess having a space, respectively, the raw water inlet pipe to the respective pipe accommodating recess, to house the sludge discharge pipe, and a piping for housing in the recess and the raw water inlet pipe and the pipe for housing the recess with a structure in which to cover the upper surface of the water inlet pipe and the sludge discharge pipe in the filling material causes a gap to fill the filling material with the sludge discharge pipe, pipe maintenance, repair performed by simply removing the filler Therefore, the restoration work becomes easier, and instead of filling the concave portion for pipe storage with a filler, a lid is detachably disposed in the concave portion for pipe storage so as to close the concave portion for pipe storage. The pipes By the structure where the water inlet pipe and the sludge discharge pipe was set to be accommodated between the use recess and the cover, it is possible to open and close only a pipe receiving recess to desorb the lid, pipe maintenance, repair work and recovery An excellent effect that the work can be performed more easily is exhibited.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 shows an embodiment of a settling basin facility according to the present invention, in which (A) is a schematic diagram of the whole, and (B) is an enlarged cross-sectional view in the AA direction of (A).
FIG. 2 shows another embodiment of the present invention and is a cross-sectional view corresponding to FIG.
FIG. 3 shows still another embodiment of the present invention and is a cross-sectional view corresponding to FIG.
FIG. 4 is a schematic view showing an example of a water treatment system.
FIG. 5 is a schematic diagram showing an example of a settling tank facility.
[Explanation of symbols]
14 Bottom plate 15 Side wall 16 Sedimentation basin tank 17 Raw water inflow pipe 18 Sludge discharge pipe 35 Inner bottom plate 36 Piping storage recess 37 Filler 38 Cover

Claims (3)

A sedimentation basin tank consisting of a concrete bottom and side walls is constructed so that the bottom is buried in the ground, and the raw water inflow pipe and sludge discharge pipe are guided through the side walls into the tank and above the bottom the so laid piping so as to position the tip in the center tank, and out of the upper surface of the bottom plate, the inner bottom plate by plain concrete, water inlet pipe and the sludge discharge pipe that is plumbed to the bottom surface plate and uniformly laying circumferentially becomes higher such thickness than the diameter dimension, it covers the water inlet pipe and the sludge discharge pipe with unreinforced concrete, housing the water inlet pipe and the sludge discharge pipe to the inner bottom panel in A sedimentation basin facility characterized by having a configuration adapted to be made. The housing of the water inlet pipe and the sludge discharge pipe to the inner bottom panel in advance water inlet pipe to the inner bottom plate, to form respectively a pipe accommodating recess having a space for accommodating the sludge discharge pipe, the respective pipes for housing the recess The raw water inflow pipe and the sludge discharge pipe are accommodated, and the gap between the pipe storage recess and the raw water inflow pipe and the pipe storage recess and the sludge discharge pipe is filled with the raw water inflow pipe with the filler. 2. The sedimentation tank apparatus according to claim 1, wherein the upper surface of the sludge discharge pipe is covered . Instead of filling the piping storage recess with a filler, a lid is detachably disposed in the piping storage recess so as to close the piping storage recess, and the raw water is provided between the piping storage recess and the lid. The sedimentation tank apparatus according to claim 2, wherein the inflow pipe and the sludge discharge pipe are accommodated.

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