JPH0753686Y2 - Settling tank - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to improvement of a settling tank in a water treatment facility.

(Prior art and its problems) In a water treatment facility in an apartment, a dormitory, etc., the tank capacity such as a treatment tank and a sedimentation tank is set to a predetermined capacity at the time of construction. I may want to change. For example, in the case of a water treatment facility using the activated sludge method, when there is a difference in the water temperature due to changes in the amount of water and the seasons, and in such cases when it is desired to change the volume load, the actual inflow wastewater load (inflow x wastewater concentration) There is a case where it is desired to change the tank capacity (processing amount) of the processing tank due to the fluctuation of.

In the conventional water treatment facility as shown in FIG. 4, in such a case, it is necessary to adjust the water level of the treatment tank 1 in order to change the treatment capacity of the treatment tank 1. In such a case, for example, A gutter-shaped V around the inner wall of the settling tank 3
Although the water level can be adjusted by moving the notch 5 up and down, the repair work for changing the vertical position of the V notch 5 is extremely difficult, and the horizontal leveling work and sealing work of the V notch 5 are also possible. As a result, there is a problem that these operations are extremely difficult and troublesome, and it is extremely difficult to change the water level of the treatment tank 1 to change the treatment capacity.

(Means for Solving the Problems) The present invention has been devised in view of the above-mentioned conventional problems, and a settling tank structure capable of changing the water level of the processing tank and changing its processing capacity extremely easily. The purpose of the present invention is to provide an elbow below the water surface of the settling tank at the tip of the advection tube in the settling tank, which is connected to the treatment tank through the advection tube. And to the elbow,
That is, a water level pipe for adjusting the water level whose upper end opening is located above the water surface of the settling tank is detachably installed.

(Operation) By installing the water level pipe detachably from the elbow fixed to the tip of the advection pipe in the settling tank, the water level in the treatment tank can be easily changed by this water level pipe. If the elbow and the water level pipe are made of PVC pipe, the water level pipe can be connected to the elbow in a watertight manner, and no major repair work is required, and the treatment capacity of the treatment tank can be easily changed. You can

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic configuration diagram of a water treatment facility, in which sewage from an apartment or the like first flows into the treatment tank 1, and a convection pipe 2 is connected to the treatment tank 1. The other end of the advection tube 2 is in communication with the settling tank 3. The bottom of the sedimentation tank 3 is formed in an inverted truncated cone shape or an inverted truncated quadrangular pyramid shape, and the waste water in the treatment tank 1 can be gradually introduced into the inside through the advection pipe 2. There is. A center well 4 is arranged in a partition shape in the center of the settling tank 3, and the advection tube 2 is placed in the center well 4.
Is open at the tip.

In this example, as shown in the enlarged view of the main part of FIG. 2, a PVC elbow 6 is fixed in a watertight manner below the surface of the settling tank 3 at the tip of the advection tube 2. The tip of this elbow 6 is opened upward, and a pipe made of polyvinyl chloride is connected to the elbow 6 from above, and a water level pipe 7 whose upper end opening is located above the water surface of the settling tank 3 is fitted and connected. It has become possible.

In the figure, 5 is a V notch similar to that shown in FIG.

For example, by preparing a plurality of water level pipes 7 having different sizes and attaching the water level pipe 7 having a long size to the elbow 6, the standing height of the water level pipe 7 is increased, and the height of the treatment tank 1 is increased accordingly. The water level can be raised, and the amount of sewage that can flow into the treatment tank 1 is increased to increase the treatment tank 1
The processing capacity of can be increased.

Therefore, the water level pipe 7 having a long length can be easily attached to the elbow 6 to increase the treatment capacity of the treatment tank 1 with the increase of the substantially inflowing wastewater. Also, the water level pipe 7
The water level of the treatment tank 1 can be easily reduced by making the dimension of the tank shorter.

Therefore, in order to change the water level as before, the V notch 5
There is no need to relocate the location due to renovation work, and settling tank 3
The water level of the treatment tank 1 can be changed extremely easily without any repair work on the V notch 5 and other piping portions inside.

Further, the sewage flowing into the settling tank 3 through the advection pipe 2 is blown out from the upper end of the water level pipe 7 as shown in the enlarged view of the main part of FIG.
Since it falls like hitting the dirty water surface inside, it is possible to favorably suppress the generation of scum on the dirty water surface in this portion. That is, conventionally, as shown in FIG. 5, scum S accumulates on the sewage surface in the center well 4 due to bubbles, and the scum S gets over the center well 4 and deteriorates the water quality. , Pests such as flies and mosquitoes propagated and there was a problem in hygiene, but in this example, the bubbles in the scum S disappear due to the falling sewage, and the scum S is satisfactorily attached to the bottom side of the settling tank 3. It precipitates and can perform a good treatment function without deteriorating the water quality.

In addition, the structure of this example may be adopted in any case, whether the treatment tank 1 and the precipitation tank 3 are made of concrete or FRP or the like. It is possible.

(Effect of the Invention) In the present invention, in a settling tank that is in communication with a treatment tank through an advection tube, an elbow is fixed at the tip of the advection tube in the settling tank below the water surface of the settling tank. Since the water pipe for adjusting the water level whose upper end opening is located above the water surface of the settling tank is detachably installed on the elbow, the elbow is submerged, so normally the water level pipe is not attached to the normal water level. It can be operated with, and when changing the capacity of the treatment tank, you can easily attach the water level hype to the elbow and change the water level of the treatment tank, and by changing the length of the water level pipe connected to the elbow, The water level in the treatment tank can be easily changed to increase or decrease the treatment capacity, and the water level can be adjusted extremely easily without requiring any large-scale renovation work as in the past.

Also, since the upper end of the water level pipe opens above the water surface of the settling tank, the sewage that flows into the settling tank through the advection pipe is ejected from the upper end of the water level pipe and taps the water surface of the settling tank. As described above, it is possible to favorably suppress the generation of scum on the dirty water surface.

Further, if a water level pipe is attached when draining water from the treatment tank, sewage will not flow back from the settling tank.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, FIG. 1 is a schematic configuration diagram of a treatment tank and a sedimentation tank in a water treatment facility, FIG. 2 is an enlarged configuration diagram of main parts in the sedimentation tank, and FIG. 3 is FIG. FIG. 4 is an operation explanatory view showing a main part corresponding to FIG. 4, FIG. 4 is a configuration diagram of a conventional water treatment facility, and FIG. 5 is an explanatory view showing a scum generation state in the conventional water treatment facility. 1 ... Treatment tank, 2 ... Advection pipe, 3 ... Precipitation tank, 4 ... Center well, 5 ... V notch, 6 ... Elbow, 7 ... Water level pipe

Claims (1)

[Scope of utility model registration request] 1. A settling tank, which is in communication with a processing tank via an advection tube, wherein an elbow is fixed to the tip of the advection tube in the settling tank below the water surface of the settling tank, and the elbow has an upper end. A settling tank characterized in that a water level pipe for adjusting the water level whose opening is located above the water surface of the settling tank is detachably installed.