JP3225178B2 - Sludge structure in river purification facility - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sludge drainage structure in a river purification facility, and more particularly, to a river for purifying a sludge reservoir by passing a river water by a natural flow method into a purification water tank connected below. The present invention relates to a structure attached to a purification facility for discharging sludge stored in a sludge reservoir.

[0002]

2. Description of the Related Art At present, instead of a river purification facility employing a contact oxidation method between gravel which requires a huge site, a contact material having a large specific surface area and a high porosity is used for a purification tank.
River purification facilities that are compact and have high purification capacity are being piloted.

[0003] In such a river purification facility, a sludge reservoir is provided below a purification water tank, and the sludge stored in the sludge reservoir is collected in a sludge disposal facility by a suction pump or the like, and then disposed of as industrial waste. Is the current situation.

[0004]

However, in the case of industrial waste treatment, there is a problem that an operator and a waste sludge disposal facility are required, and the amount of sludge is large, so that the cost is enormous.

[0005] In addition, when the sludge is suspended in water by aeration and then discharged into a river, the sludge is diluted and does not become a turbid flow in a flood in which the flow rate of the river increases. Since the outlet was hidden in the water, it was impossible to discharge the water from the purification tank to the river.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to enable sludge to be automatically discharged to a river without human intervention during a flood, which is advantageous in cost. An object of the present invention is to provide a sludge structure in a river purification facility.

[0007]

A mud discharging structure according to the present invention is provided on a rubber dam in a river, from an upstream side of the rubber dam to a downstream side of the rubber dam through a purified water tank in which a sludge reservoir is continuously provided below. And a river purification facility that purifies the river water by natural flow.

In order to use the natural flow method, the water intake section is provided on the upstream side where the water level rises due to the dam of the rubber dam, and the discharge section is opened above the water surface on the downstream side where the water level decreases, and the water intake section is discharged. A predetermined height difference is provided so as to be above the part.

It is desirable that the purified water tank be filled with a contact material having a relatively large porosity, in which the sludge is easily stored in the sludge reservoir.

According to the present invention, as a means for achieving the above object, there is provided a high water introduction section into which only the river water on the upstream side which can exceed the rubber dam by a certain height or more during a flood, and the high water introduction section is provided with the purified water tank. And a sludge withdrawal pipe having one end connected to the sludge reservoir and the other end open to the downstream above the water surface on the downstream side during the flood, and the sludge withdrawal pipe is connected to the sludge withdrawal pipe. It is a siphon-shaped one which is higher than a connection portion between the high water introduction section and the introduction pipe and is highest at a position lower than a ceiling of the purified water tank.

Here, the certain height is a water level of a river whose flow rate is increased to such an extent that sludge discharge is permissible, and is determined by a height of a wall (a weir plate) for flowing river water in a high water introduction section. Stipulate.

The high-water introduction section into which only the river water on the upstream side can flow is intended to provide the high-water introduction section on the upstream side.

Further, the position lower than the ceiling of the purified water tank is a position lower than the water level when the inside of the purified water tank is filled with river water.

Further, in the present invention, the rubber dam may be laid down at a predetermined height exceeding the predetermined height.

At present, rubber dams used in river purification facilities are filled with air, and when the water level of the river reaches a set value during a flood, a sensor is activated to cause air to leak and fall down. Has become. Therefore, the predetermined height is input to the rubber dam as a set value.

[0016] The predetermined height is set with respect to the high water introduction section.
The water level is set to an elevated level to sufficiently supply the river water required for sludge discharge.

[0017]

According to the present invention, when the water level on the upstream side in normal times, which coincides with the height of the rubber dam, rises to a certain level during a flood, the river water flows into the high water introduction section. At the time of the flood, since the discharge section provided on the downstream side is hidden in the water, the river water inside the purified water tank is stagnant. When river water is introduced into the purified water tank in such a state from the high water introduction section via the introduction pipe, the water level in the purified water tank rises, and when this water level exceeds the highest part in the sludge discharge pipe, The siphon mechanism is activated, and the sludge stored in the sludge reservoir is discharged to the downstream side through the sludge discharge pipe.

Further, when the water level on the upstream side further rises and reaches a predetermined height, the rubber dam falls down and the water level on the upstream side falls, so that the flow of river water into the high water introduction section stops.

[0019]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is an explanatory diagram of the vicinity of a river purification facility provided with a mud discharging structure according to the present invention, as viewed from above. This facility purifies river water taken in from the upstream side of a rubber dam 2 provided in the river 1 via an intake 3 ′ and an intake pipe 3 through a purifying water tank 10 provided in the basement of a high water bed. Downstream side 1b of rubber dam 2 through discharge pipe 4 and discharge port 4 '
It is to be discharged to.

The rubber dam 2 has a mechanism in which, when the water level of the river 1 reaches a set value, a sensor is activated to automatically leak internal air and fall down.

As shown in FIG. 2, the water intake port 3 'is provided so as to come into the water on the upstream side 1a whose water level is raised by the rubber dam 2, and the discharge port 4' is located above the water surface on the downstream side 1b (normally). ). In addition, the water intake 3 ′ is located above the discharge outlet 4 ′, and the height difference is used to set the river water to flow naturally from the intake pipe 3 to the discharge pipe 4 via the purified water tank 10.

FIG. 3 is an explanatory view of the purified water tank 10 viewed from the side. In the purified water tank 10, a contact sedimentation tank 11 for sedimenting solid pollutants floating in river water and a contact oxidation tank 12 for biologically oxidizing soluble pollutants in water are juxtaposed in the flowing direction. , 12 are provided with sludge reservoirs 13 respectively. The contact settling tank 11 is filled with a corrugated contact material, and the contact oxidation tank 12 is filled with a plastic contact material having a large specific surface area and a high porosity. When such a contact material is used, a purified water tank is used. Sludge that accumulates on the sludge 10
The sludge which is likely to settle to 3 and is concentrated in the sludge reservoir 13 has a high water content of about 97%.

Referring to FIGS. 1 and 4, on the upstream side 1a, a high water introduction section 20 is provided at a position higher than the rubber dam 2, and this section 20 surrounds a side edge of the bottom plate 22 with a weir plate 21. In other words, the intake pipe 3 is communicated with the purified water tank 10 by an introduction pipe 23 of a different system. The weir plate 21 defines a water level at which river water can flow into the high water introduction section 20,
The discharge of sludge into the river is permissible at the flow rate that reaches this water level.

Further, one end of a sludge drawing pipe 24 is connected to the bottom of each sludge reservoir 13, and the other end 24 ″ of the pipe 24 is open relatively upward on the downstream side 1b. The direction of the sludge extraction pipe 24 in 5 is for convenience.

The sludge withdrawal pipe 24 has a siphon shape having a highest part 24 ′ which is the highest in the middle, and the height of the highest part 24 ′ is a connecting part 23 ′ between the high water introduction section 20 and the introduction pipe 23. (See FIG. 4) higher than the ceiling 10 'of the purified water tank 10.

Next, the operation of the sludge discharging structure configured as described above will be described.

In normal times, the water level on the upstream side 1a coincides with the height of the rubber dam 2 (see FIG. 2), and the river water taken in from the discharge port 3 'passes through the purified water tank 10 to the discharge port 4'.
It is released from.

During a flood, when the water level gradually rises,
Discharge outlet 4 'due to increase in overflows over rubber dam 2
Is hidden in the water, whereby the flow of river water in the purified water layer 10 stagnates.

When the water level further rises, as shown in FIG. 5, the river water flows over the weir plate 21 into the high water introduction section 20, and when the water volume increases, the river water is purified through the introduction pipe 23. It starts to flow into the water tank 10. Thereby, the purified water tank 10
When the water level rises and this water level exceeds the highest part 24 ′ of the sludge withdrawal pipe 24, the water pressure connects the siffin mechanism of the sludge withdrawal pipe 24, so that river water flows to the downstream side 1 b via the sludge reservoir 24. The sludge discharged and stored in the sludge reservoir 24 is also discharged together with the river water.

When the water level further rises and reaches the set value input to the rubber dam 2, the rubber dam 2 falls down. As a result, as shown in FIG. 6, the water level of the river 1 is lowered to such a level that the river 1 cannot cross the weir plate 21.
The fourth cyfin mechanism is cut off. Note that, even in this state, since the discharge port 4 is hidden in the water, the purified water tank 10
Has stopped functioning.

[0032]

As described above, according to the present invention, at the time of flooding in which sludge discharge to the river is permissible, river water having a certain height or more is introduced into the purification tank, and By raising the water level, it is possible to operate the siphon mechanism of the sludge withdrawal pipe, so that the sludge stored in the sludge reservoir can be automatically discharged to the river without any human intervention. In comparison, the cost spent on sludge disposal can be significantly reduced.

[Brief description of the drawings]

FIG. 1 is an explanatory view schematically showing the vicinity of a river purification facility provided with a mud discharging structure according to the present invention.

FIG. 2 is a schematic side view showing a river sectioned by a rubber dam.

FIG. 3 is a schematic side wall showing a purified water tank and a sludge reservoir.

FIG. 4 is an explanatory diagram showing the water level of a river in normal times.

FIG. 5 is an explanatory diagram showing a water level at which sludge can be discharged.

FIG. 6 is an explanatory diagram showing a water level after a rubber dam falls down.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 River 1a Upstream side 1b Downstream side 2 Rubber dam 3 'Inlet 4' Outlet 10 Purified water tank 20 High water introduction section 21 Weir plate 23 Inlet pipe 23 'Connection part 24 Sludge extraction pipe 24' Highest part

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) C02F 1/00 C02F 3/00 E02B 8/02

Claims (2)

(57) [Claims] 1. A river purification facility provided on a rubber dam in a river, which purifies the river water by flowing naturally from an upstream side of the rubber dam to a downstream side of the rubber dam through a purification water tank in which a sludge reservoir is provided downward. A drainage structure attached to the
One end is connected to the sludge reservoir, and a high water introduction section into which only the upstream river water that exceeds the rubber dam by more than a certain height during the flood can flow, an introduction pipe communicating the high water introduction section with the purified water tank, A sludge withdrawal pipe, the other end of which is open to the downstream side above the water surface on the downstream side during the flood, and the sludge withdrawal pipe is connected to the high-water introduction section and a connection portion between the introduction pipe. A muddy structure in a river purification facility, which is a siphon-like structure that is high and is the highest at a position lower than the ceiling of the purification tank. 2. The mud discharging structure in a river purification facility according to claim 1, wherein the rubber dam lays down at a predetermined height that exceeds the predetermined height.