JPS5930159B2 - water treatment equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a water treatment device in which the upper end side of a vertical water tank buried deep underground is connected to an above-ground structure.

The above-mentioned water tank is generally made of sand, clay, etc., or soft ground with a mixture of these, soft rock, gravel, etc. below it, or
These are buried deep underground over a mixture of hard ground, but when crustal movements such as earthquakes occur, the amount of movement in soft ground is greater than in hard ground. Relative displacement occurs.

As a result, if a water tank is constructed from steel pipes or concrete structures as in the past, large shear stresses will occur in the water tank during earthquakes, etc. near the boundary between soft and hard ground and near the connection points with above-ground structures. However, there is a risk that the water tank will be destroyed, and if such a water tank is destroyed or cracks occur, there is a risk of contamination of groundwater due to leakage of sewage, and there is a risk of causing great damage. be.

In order to avoid such dangers, conventional methods have been taken such as increasing the seismic strength of the water tank itself as much as possible, or limiting the depth of the water tank to a length that does not reach the hard ground. However, in the former case, the cost of constructing the water tank is high, and in the latter case, the capacity of the water tank to be treated is small relative to the installation area, making it difficult to obtain sufficient treatment capacity. There is.

The purpose of the present invention is to obtain an aquarium with excellent earthquake resistance,
It is an object of the present invention to provide a water treatment device which can relatively reduce the cost for installing a water tank, can accommodate a sufficient amount of water to be treated, and has an excellent treatment capacity.

A characteristic configuration of the water treatment device according to the present invention is that the vertical water tank is mainly formed of a bottomed cylindrical body made of a flexible watertight material, and the buried part of the vertical water tank is located near the ground surface. Set to a length that faces the soft ground and the hard ground below,
In addition, a hard pipe is provided that partially surrounds the upper side of the buried portion within a range that does not reach the hard ground, and this configuration provides the following effects.

In other words, the vertical water tank itself is made of flexible watertight material, and only the part made of flexible watertight material is buried into the underlying hard ground, which increases the rigidity of the tank. It is easy to construct a low-cost, highly economical aquarium by using generally inexpensive flexible watertight materials and by simple construction, without using methods that increase costs, such as using a water tank. Moreover, since it can be buried deep underground in this way, it is possible to secure a sufficiently large capacity for water to be treated in the aquarium, making it possible to obtain a water treatment device with excellent treatment capacity. It is.

Furthermore, since the upper part of the water tank is equipped with a hard pipe that surrounds the water tank without reaching the hard ground, the weight of above-ground structures and the vibrations of drive motors etc. act on it, and the soil is also close to the soft ground surface. This prevents the collapse of ±6 around the water tank, thereby making it possible to safely install a water treatment device for a long period of time while using a flexible material and ensuring the shape retention of the water tank.

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

As shown in FIG. 1, the upper end of a vertical water tank 1 buried deep underground is connected to an above-ground structure A in a state where it communicates with a water tank 2 provided therein, and an inner pipe is inserted into the vertical water tank 1. Set up 4,
The upper end of the inner pipe 4 is connected to the water pumping tank 3 located above the water tank 2 and provided in the ground structure A, and the water tank 2 is connected to the water pumping tank 3.
A pump 5 for pumping water is provided, and the activated sludge-containing water is circulated and flowed in such a manner that it descends inside the inner pipe 4 and rises outside the inner pipe 4.

A nozzle 6 is provided for supplying oxygen-containing gas such as air into the water in the inner pipe 4, thereby dissolving a large amount of oxygen from entrained air bubbles as the water flows downward, resulting in efficient aeration by highly concentrated activated sludge. It is configured so that the processing can be performed.

The aerated treated water is then sent to the solid-liquid separation process together with the activated sludge.

The vertical water tank 1 is formed of a cylindrical body with a bottom made of a flexible watertight material such as rubber or vinyl, and is made of soft ground E1 such as sand or clay, and soft rock or gravel underneath. It is buried in a pit that is excavated across the hard ground E2, and the entire buried cylindrical body is exposed to the ground.

In other words, due to earthquakes, soft ground E1 and hard ground E
2, or a relative displacement occurs between the above-ground structure A including the water tank 2, pumping tank 3, separation tank 7, etc. and the vertical water tank 1, the vertical water tank 1 It is constructed so that it cannot be destroyed due to its flexibility.

In the upper part of the vertical water tank 1, the hard pipe 10 is partially surrounded by the buried part of the cylindrical body on the upper side where the soft ground E1 near the ground surface tends to collapse, so as not to impair economic efficiency (safety). It has a high level of sexiness.

The internal structure and water treatment form of the vertical water tank 1 can be changed in various ways, such as eliminating the inner pipe 4, and the specific structure and installation configuration of the above-ground structure A can be changed, or the above-ground structure The structure in which the object A and the vertical water tank 1 are connected can also be changed in various ways.

[Brief explanation of the drawing]

The drawing is a schematic longitudinal sectional view showing an embodiment of the water treatment device according to the present invention. 1...Vertical water tank, 10,11...Hard pipe, A...Ground structure, El...Soft ground, E2...・Hard ground.

Claims (1)

[Claims] 1 A water treatment device in which the upper end side of a shaped water tank 1 buried deep underground is connected to an above-ground structure A, the vertical water tank 1
It is mainly formed of a bottomed cylindrical body made of flexible watertight material, and the buried part of the vertical water tank 1 is set to a length that faces the soft ground E1 near the ground surface and the hard ground E2 below, A water treatment device characterized in that a hard pipe 10 is provided that partially surrounds the upper side of the buried portion within a range that does not reach the hard ground E2.