JPH11197409A - Waste water treatment apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To extremely efficiently precipitate and remove sludge from waste water in a narrow space. SOLUTION: A waste water flowing out pipe 67 for leading out waste water upward is connected with the end part of a site to which waste water flows, treatment tanks 76, 77 are installed in the outer circumference of the flowing out pipe 67 and control means for making the waste water flow down at moderate speed from the outflow pipe are installed in the treatment tanks. In an apparatus constituted in such a manner, a plurality of treatment tanks 76, 77 are installed and these tanks are communicated with one waste water flow pipe or branched pipes and buffer members 80 to which flowing out waste water comes into collision are installed face to face. The treatment tanks may be porous and parted one another and made to be double inside and outside.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewage treatment apparatus which can be constructed, for example, in an existing sedimentation basin and can efficiently collect and remove sludge in a small space.

[0002]

2. Description of the Related Art For example, sewage which first flows into a sedimentation basin flows slowly through a large number of holes in a flow straightening plate, so that only sludge is naturally settled out of the sewage.

[0003]

In such a system, a large sedimentation basin is required for the natural sedimentation, as is well known. In addition, a chain circulation system and a system with a scraper-equipped carrier on a guide rail are used. The sludge scraping device is also large-scale, and the equipment cost is increased, which is inconvenient. SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to settle and remove sludge from sewage in an extremely efficient and space-saving manner.

[0004]

According to a first aspect of the present invention, there is provided a sewage discharge pipe for discharging sewage upward from an end of a place where sewage flows. A processing tank is provided on the outer periphery of the tank, and control means for reducing the speed of the wastewater from the outflow pipe to flow down is provided in the processing tank.

According to a second aspect of the present invention, in the first aspect, a plurality of processing tanks are arranged, and one of these processing tanks is provided.
It branches off from the sewage stream of the book and communicates.

[0006] The invention described in claim 3 is claim 1 or 2.
, A buffer member against which the outflowing sewage strikes is disposed above the sewage outflow pipe.

According to a fourth aspect of the present invention, in any one of the first to third aspects, the treatment tank is porous.

According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the processing tank is configured to be separated from each other by inner and outer duplexes.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the illustrated embodiments. The embodiment shown in FIGS. 1 and 2 is a sewage treatment apparatus configured for a conventional rectangular sedimentation basin 61. The sedimentation basin 61 generally has a flow straightening plate on one side into which sewage flows.
And an opening 63 is formed below the gate 64 to form a gate 64.
It can be opened and closed with. 65 is a gate opening / closing mechanism.
Note that the partition wall 62 is formed ex post facto, and may be formed by separately providing a partition plate at the location of the current plate.

Reference numeral 67 denotes a sewage outflow pipe.
Is a tube in which a horizontal tube portion and an upwardly extending vertical tube portion are integrally or separately connected by an elbow portion.
The elbow portion is bent with a constant radius, but a tube bent at a right angle may be used.

A pit 69 is provided at an extension of the bottom wall 70 as before. 71 is a carrier (trolley)
2 along the guide rails 73 installed at the center of the bottom wall 70 and on both the left and right sides by the running wheels 72. Numeral 74 denotes a scraper, which is lowered vertically when scraped and rises horizontally when not scraped.
Incidentally, the sewage outflow pipe 67 may be arranged corresponding to the center of the pit 69.

In the space above the pit 69, a diffusion board 75 is disposed so as to face the upper end opening of the sewage outflow pipe 67.
Is fixedly provided with the sewage outflow pipe 67 and the like fixed. Further, the inner processing tank 76 and the outer processing tank 77 are installed as inner and outer double tubes at circumferential intervals so as to be located concentrically on the outer periphery of the sewage outflow pipe 67. , A conversion board 78 is fixed so as to face below the inner processing tank 76. Reference numeral 79 denotes a stay for fixing the treatment tanks 76 and 77 to the wastewater outflow pipe 67.

From the water surface level higher than the water surface 81, the partition 6
The sewage that has flowed down the second time is ejected from the sewage outflow pipe 67 as a jet from the upper end opening as shown by an arrow, and the jet hits the diffusion plate 75 and diffuses. At this time, the energy is attenuated. In order to further increase the attenuation effect, a buffer member 80 may be provided as shown by a virtual line. Further, when a diffusion flow is formed, the water is ejected and diffused in water below the water surface 81, so that the energy is more effectively attenuated. Then, the diffusion flow from the diffusion board 75 is guided into the inner processing tank 76 and becomes a gentle flow, and then the direction is changed by the conversion board 78 to reach the outside processing tank 77.

However, the sewage is greatly attenuated by the time the effluent reaches the outside treatment tank 77, and flows down naturally through a sludge descending port 82 formed between the outer periphery of the conversion plate 78 and the lower end of the outside treatment tank 77. go. In order to further guide the flow down into the pit 69, a guide chute 83 having a constricted shape may be continuously provided as shown by a virtual line in FIG. Note that a circumferential gap may be provided between the conversion board 78 and the sewage outflow pipe 67 to allow sludge to flow downward. In this case, a descent guide chute 84 may be provided.

The diffusion plate 75 may be itself made of a cushioning member. Also, the diffuser 75 is movable,
It may be received by a buffer member 85 such as a spring or rubber on the upper side. Furthermore, the sludge floating from the inside of the processing tanks 76 and 77 is made to flow downward by an overflow weir 86 provided so as to surround the upper outer periphery of the outer processing tank 77, and only the supernatant water passes over the overflow weir 86 and flows outside. Run out to. Further, the sludge further strikes the partition plate 87 and forms a downward flow, while the supernatant water flows out of the partition plate 87 into the sedimentation basin 1.

Incidentally, as shown in FIG.
7 in a horizontal plane, and a plurality of similar processing tanks 90,
90. As shown by the arrow X, a plurality of holes may be formed in the partition wall 62, and the sewage outflow pipe 67 may be connected to each of the holes. Further, as shown in FIG. 2, a water purifying material 91 such as porous ceramic or activated carbon may be arranged on one wall to promote purification.

The water purifying materials 91 may be arranged in a staggered arrangement as seen from the side as shown in FIG. Each processing tank has a round tube shape, but may be a square tube. This can be applied to the following embodiments.

FIG. 3 shows another embodiment. In this embodiment, both the inner processing tank 76 and the outer processing tank 77 on the outer periphery of the sewage outflow pipe 67 are formed of a porous material such as a punching metal (or a resin) or a net-like material to settle sludge and float separated water. Is made more effective. The diameters of the inner and outer processing tanks 76 and 77 may be the same or may be larger.

The hole shape may be a square, a rhombus, or the like, in addition to a round shape. Further, the hole diameter of the upper portion of the inner processing tank 76 may be made smaller and smaller toward the lower portion. The hole diameter at the lower part of the outer processing tank 77 may be smaller and may be larger at the upper part. Alternatively, a pipe may be inserted into some or all of the holes. The porosity may be only the inner processing tank 76 or only the outer processing tank 77. Also,
The inner processing bath 76 may have a bottom plate, or a bottom plate for both the inner processing bath 76 and the outer processing bath 77 may be provided.

In the embodiment shown in FIG. 4, a plurality of outflow holes 93 are formed in the peripheral body of the inner processing tank 76, and the flow from the outflow holes 93 forms a spiral flow in the outer processing tank 77. Thus, the control blades 94 are provided. Between the inner processing tank 76 and the outer processing tank 77, a partition plate 95 is also bridged as a connecting plate. The partition plate 95 has a vertically long and a spiral flow so as to block the spiral flow. In some cases, the stay may be like a short stay up and down that has only a connection function without obstructing the flow.

Further, the partition plate 95 may be made porous as shown in the figure. Further, the outer processing tank 77 can be provided with the same outflow holes 93 and control blades 94 as the inner processing tank 76, while the outflow holes 93 and the control blades 94 only in the outer processing tank 77. It can be attached. Inner processing tank 76 and / or outer processing tank 7
7 may be tapered downward or upward.

When a spiral flow is generated in the inner and outer processing tanks 76 and 77, the directions of the spiral flows in the inner processing tank 76 and the outer processing tank 77 can be reversed. Further, the control blade 94 can be formed by an insertion pipe. In the above embodiment, the blades 94... Extend in the same direction in the inner processing tank 76, but the blades 9 adjacent to a certain blade 94.
4 may be directed in the opposite direction so that the drained sewage collides with each other.

The embodiment shown in FIG.
7 and a point where the outflow pipe 97 is inserted so that the wastewater flows out into the inner processing tank 76 so as to attenuate the flow from the diffusion plate 98.
The point where a is formed is shown in combination. Each point can be independently configured. The outer processing tank 77 may be made porous, or the inner and outer processing tanks 76 and 77 may be made porous.

The embodiment shown in FIG.
7, the diffusion plate 75 and the inner and outer processing tanks 76 and 77 are formed in an elliptical shape when viewed from above. Inner and outer processing tanks 76, 7
Only 7 may be elliptical.

In the embodiment shown in FIG. 7, an outflow pipe 100 is inserted through the inner processing tank 76. In particular, the inner end of the pipe 100 has an opening face downward so that sludge does not enter. It is. As shown in FIG. 9, the pipe 100 may be L-shaped so that the inner tip is downward, or the insertion direction may be oblique and downward. The opening surface may be provided with a porous material such as a mesh material.

In the embodiment shown in FIG. 8, the outflow pipe 103 inserted into the hole 102 has a semi-cylindrical shape.

FIG. 10 is a cross-sectional view in which an elbow-shaped outflow pipe 105 is inserted into and fixed to the inner processing tank 76 or the outer processing tank 77. The direction of the pipe 105 is determined so that the axis is bent in a horizontal plane, but may be determined such that the axis is bent in a vertical or inclined plane. Alternatively, as shown by a virtual line, a T-shaped pipe may be used to divide the flow. A cross-shaped pipe may be used.

FIG. 11 is a plan view showing the sewage outflow pipe 107 connected to the hole of the partition wall 62 in a communicating manner.
Are formed into a left and right branch shape, and are divided into equal amounts by the branch plate 108 to the left and right. The left and right branched pipes are made to rise and the diffusion plate 75 is opposed thereabove, and the inner processing tank 76 and The outer processing tank 77 is provided in a square cylindrical shape when viewed from above.

As described above, by making one wastewater outflow pipe 67 branch, the flow of wastewater is greatly attenuated, and sedimentation after diffusion becomes effective. 109 is an overflow weir. As shown by the imaginary line, the sewage outflow pipe 67 can be formed to be as long as possible to make the path as long as possible. In addition, the inner processing tank 76 or the outer processing tank 77 is a square tube, but can be installed in a state where the angle is shifted by 90 degrees from the state of the solid line, or can be a round shape.

FIG. 12 shows a modified example of the sewage outflow pipe 112. The figure is a front view as viewed from an extension of the axis of a horizontal portion connected to the partition wall of the sewage outflow pipe 112. The sewage outflow pipe 112 is formed so as to branch right and left from the horizontal portion, and the branch further extends upward to face the same. That is, it is composed of a base part a, a branch part b, an upright part c, and an outflow part d.

A diffusion plate 113 made of a buffer member is provided between the two outlets d, d, and a porous inner processing tank 76 and a non-porous outer processing tank 77 are provided.

[0033]

As described above, the present invention is constructed as described above, and therefore, it is possible to settle and remove sludge from sewage in an extremely efficient and space-saving manner.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of FIG.

FIG. 3 is a schematic longitudinal sectional view showing an embodiment in which a treatment tank is made porous.

FIG. 4 is a plan view showing an embodiment in which sewage is spirally discharged from a processing tank peripheral body;

FIG. 5 is a schematic longitudinal sectional view showing an embodiment for enhancing the damping effect.

FIG. 6 is a plan view showing an embodiment in which the entire device is made elliptical.

FIG. 7 is a schematic longitudinal sectional view showing an embodiment in which an outflow pipe is inserted into an inner processing tank.

FIG. 8 is a front view showing an embodiment in which a semi-cylindrical outflow pipe is inserted into a hole of a processing tank.

FIG. 9 is a longitudinal sectional view showing another installation example of the outflow pipe.

FIG. 10 is a cross-sectional view showing another installation example of the outflow pipe.

FIG. 11 is a plan view showing another embodiment of the sewage treatment apparatus.

FIG. 12 is a longitudinal sectional view showing another embodiment of the sewage treatment apparatus.

[Explanation of symbols]

61 sedimentation basin 69 pits 75, 98, 113 diffusion plates 76, 77 treatment tanks 67, 107, 112 sewage outflow pipe 80 buffer member.

Claims (5)

[Claims] 1. A sewage outflow pipe for flowing out sewage upward is connected to an end of a place where sewage flows, and a treatment tank is provided on an outer periphery of the outflow pipe. A sewage treatment apparatus provided with control means for reducing the speed of sewage from a pipe to flow down. 2. The sewage treatment apparatus according to claim 1, wherein a plurality of treatment tanks are arranged, and these treatment tanks are branched from one sewage flow and communicate with them. 3. The sewage treatment apparatus according to claim 1, wherein a buffer member against which the outflowing sewage strikes is disposed above the sewage outflow pipe. 4. The sewage treatment apparatus according to claim 1, wherein the treatment tank is porous. 5. The sewage treatment apparatus according to claim 1, wherein the treatment tank is configured to be separated from each other by internal and external doubles.