JPS6150610A - Apparatus for treating waste water - Google Patents

Abstract

PURPOSE:To efficiently treat a suspended floating substance to a tolerant level, by arranging a partition cylinder in a treatment tank having a treating water introducing port and a treated water flooding port at the upper end part thereof and a precipitated suspended floating substance discharge port at the lower end part thereof. CONSTITUTION:Waste water is introduced into the upper part of a sedimentation pipe 8 from an introducing port 1 and a precipitated and separated suspended floating substance is accumulated in the vicinity of a discharge port 3 and discharged through a discharge pipe 10 according to necessity. Treated water is withdrawn from the flooding port 2 provided to the uppermost part of a water stream reversal rising region 7. Waste water is moved downwardly and passed between the suspended low end part of a partition cylinder 6 and the lower end part of a treatment tank 4 and reversed in its flow direction to rise. The floating substance does not pass through the drilled holes 9 provided to the peripheral wall of the sedimentation pipe 8 and moves gradually to the lower direction to be precipitated along the inclined surface of the lower end part of the treatment tank 4.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a wastewater treatment device, and particularly to a wastewater treatment device that treats wastewater containing suspended solids of various properties by a solid-liquid separation method in a stationary state. Regarding.

(Problems with the prior art) Conventionally, there are various types of devices that can easily treat wastewater, such as those that use the difference in specific gravity to settle and separate solids in a sedimentation tank or the like, or those that combine this with buckles, filters, etc. This type of device is widely known.

However, when the water to be treated contains various suspended solids with relatively small particle sizes, it is not always easy to separate them using such conventional equipment. Furthermore, it is necessary to use equipment with various configurations depending on the type of suspended solids, and in order to achieve sufficient treatment effects, the equipment often becomes large-scale and equipment and maintenance costs increase. .

(Object of the Invention) The object of the present invention is to provide a wastewater treatment device that eliminates the drawbacks of the prior art and can efficiently treat wastewater containing various suspended solids to an acceptable level with a simple structure. Our goal is to provide the following.

(Structure of the Invention) To achieve the above object, the wastewater treatment apparatus of the present invention has an inlet for treated water and an overflow port for treated wastewater at the upper end thereof, and the wastewater treatment apparatus has an inlet for treated water and an overflow port for treated wastewater, and the wastewater treatment apparatus has an inlet for treated water and an overflow port for treated wastewater. a treatment tank having a discharge port for suspended solids at its lower end; and a treatment tank that is vertically disposed from the upper end to the lower end of the inside of the treatment tank, and the inside of the tank is connected to a settling area of the water to be treated, and a part near the lower end of the settling area. A partition tube that partitions into a reversal and rising region of the water flow after treatment, and a partition tube that is installed almost concentrically with a radial gap inside the partition tube, and one end is connected to the wastewater inlet. The settling pipe is characterized in that the lower end thereof is opened toward the discharge port side of the suspended solids, and the settling pipe has a peripheral wall formed with a large number of through holes.

(Embodiments of the Invention) More specific configurations of the present invention and the effects obtained based thereon will be explained in more detail below based on embodiments shown in the drawings.

FIG. 1 and FIG. 2 are a plan view and a longitudinal cross-sectional view, respectively, showing an outline of an embodiment of a wastewater treatment apparatus according to the present invention.

In the figure, a vertical cylindrical treatment tank 4 with a circular cross section introduces waste wood to be treated from an inlet 1 at the upper end as described later, and the waste wood is suspended and suspended in wastewater that is settled and separated in the tank. Materials are discharged in the form of concentrated slurry from a discharge port 3 at the lower end, and treated wastewater is discharged to the outside from an overflow port 2 at the upper end.

Inside the treatment tank 4, a cylindrical partition tube 6 with a circular cross section is vertically installed from the upper end to the lower end, and the inside of the treatment tank 4 is divided into a sedimentation area 5 for wastewater and an inversion and rise area for wastewater after treatment. It is divided into 7 regions and 1.

The lower end of the partition tube 6 is opened toward the discharge port 3 of the suspended solids at the lower end of the processing tank 4 .

The opening edge of this hanging lower end is opposed to the peripheral wall of the lower end of the processing tank 4 with a predetermined gap therebetween, and the partition tube 6
The water flow that descends through the sedimentation area 5 formed inside the tank is reversely raised through the gap, and is caused to rise in the drainage reversal and rise area 7 outside the partition plate 6 toward the upper end of the treatment tank 4. .

Here, the peripheral wall of the processing tank 4, which faces the vertical lower end of the partition tube 6 with a gap therebetween, is inclined at a predetermined angle in one direction.

Further, inside the partition tube 6, a cylindrical settling pipe 8 also having a circular cross section is vertically disposed concentrically with a radial gap with respect to the partition tube, and the waste water inlet 1 is connected to the upper end of the settling pipe 8. The lower end thereof is opened to the suspended matter discharge port 3 side in the same way as the lower end of the partition tube 6. The peripheral surface of this settling pipe 8 has a large number of through holes 9.9112. are bored at appropriate pitches in the vertical and circumferential directions so that the basin inside the pipe communicates with the settling region 5 formed inside the partition tube 6.

Furthermore, in the illustrated embodiment of the present invention, the treatment tank 4
Discharge pipe 10 for concentrated slurry discharge port 3 at the lower end of
is connected and raised along the side wall of the processing tank 4 almost to its upper end. The upper discharge end IQA of the discharge pipe 10 is formed of a large flexible plastic pipe or the like, and by bending it, the relative height of the upper end of the discharge pipe with respect to the water surface of the treatment tank 4 can be adjusted. being done. 10
B is a support member for the discharge pipe.

(Functions and Effects) When treating wastewater containing suspended solids with the wastewater treatment apparatus shown in FIGS. Inject gradually. During the progress of the treatment, suspended solids settled and separated from the wastewater are accumulated near the discharge port 3 at the lower end of the treatment tank 4 and are discharged through the discharge pipe 10 as necessary. On the other hand, the treated wastewater is discharged from the overflow port 2 provided at the top of the water flow reversal and rise area 7 of the treatment tank 4. [! He is pulled out by the commander.

Here, the wastewater in the settling area 5 of the partition tube 6 is gradually moved downward by the waste water continuously injected from the upper part of the settling pipe 8, and the periphery of the hanging lower end of the partition tube 6 and the lower end of the treatment tank 4 are gradually moved downward. The direction of the flow is reversed through the gap between the two, and the water enters the rising region 7 between the outside of the partition tube 6 and the treatment tank 4.

The wood that has entered the rising area 7 is raised by the water pressure of wastewater continuously injected into the settling pipe 8, and is pulled out as treated wastewater from the overflow port 2 at the top end.

On the other hand, the suspended solids contained in this wastewater are
As the wastewater is injected into the upper part of the settling pipe 8, it is transported downward through the settling area 5, but in this case, the capacity of the treatment tank 4 (approximately 12 m3 in this example) is injected. If the amount is made sufficiently large compared to the amount of wastewater (for example, 20017 minutes), the descending speed of the wastewater in the settling region 5 will be extremely slow. In particular, most of the wastewater injected into the settling pipe 8 passes through a through hole 9 drilled in the peripheral wall of the pipe and is once discharged horizontally into the gap between it and the partition cylinder 6, and then flows into the cylinder. Since it takes a descending route,
The suspended solids descending through the sedimentation region 5 gradually move downward over a long period of time through a relatively long flow path as a whole. When reaching the lower end of the partition tube 6, most of the suspended solids are separated from the water and deposited near the discharge port 3.

Here, some of the suspended solids with a small particle size try to float up along with the drainage that reverses and rises through the gap at the lower end of the partition tube 6, but from a gap with a narrow opening area to a wider The floating suspended matter loses almost no kinetic energy when exiting the inversion and rise region 7, and most of it is deposited again at the discharge port 3 along the slope at the lower end of the treatment tank 4. Thereafter, while rising in the inversion rising area 7 along with the drainage water, a considerable portion of the remaining suspended solids contained therein further settles and is drawn out from the overflow port 2 at the top end of the rising area 7. The suspended solids remaining in the wastewater after treatment are only particles smaller than about 300 mesh in particle size.

In this example, with the above device specifications and processing conditions, S
As a result of continuous treatment of wastewater with an S concentration of approximately 200 ppm,
The SS concentration of the resulting treated wastewater is reduced to about 20 ppm.

On the other hand, the suspended solids that have been sedimented and separated from the wastewater and deposited at the discharge port 3 at the lower end of the treatment tank 4 are pushed by the water pressure in the tank and rise through the discharge pipe 10 to rise to the water surface of the treatment tank 4. The concentrated slurry is discharged to the outside of the tank from the discharge end 10A located near the height of the slurry.

Here, for example, during wastewater treatment work, the discharge end 1O
If the height of A is set higher than the water surface of the treatment tank 4, the slurry will not be discharged, and this flexible discharge end 1 can be removed at the desired time.
By bending 0A downward and lowering its height below the water surface, the thick slurry inside the pipe is discharged to the outside of the tank. In this case, if the lower discharge pipe 10 is removed from the support member 10B and the height of the discharge end 10A is significantly lowered, the deposits in the tank will be discharged at once together with the waste water, and the inside of the treatment tank 4 will be easily cleaned. - In this way, in the embodiment of the present invention, the processing tank 4
After the wastewater injected into the tank is allowed to fall through the settling area 5 formed by dividing the tank by the partition tube 6, a narrow gap between the hanging lower end of the partition tube 6 and the lower end of the treatment tank 4 is formed. As the wastewater is inverted and raised to the overflow port 2 side of the inversion and rise area 7 through the inversion rising area 7, the suspended solids contained in the wastewater are separated into solid and liquid during the sedimentation of this wastewater and are deposited at the bottom of the tank. Deposit.

Particularly, in the embodiment of the present invention, a settling pipe 8 is further provided in the settling area 5 of the partition tube 6, and the flow of wastewater is changed horizontally through a large number of through holes 9 bored in the peripheral wall of the settling pipe 8, and the wastewater is allowed to settle. Since the waste water is allowed to flow out into the region 5, the flow path length of the waste water in the tank is increased, and the flow is extremely slow and undisturbed. Therefore, most of the suspended solids contained in the wastewater can be gradually settled and separated, efficiently deposited on the discharge port 3 side, and separated from the wastewater.

Furthermore, in this embodiment, a siphon-type discharge pipe 10 is connected to the discharge port of the suspended solids at the lower end of the treatment tank 4, so that the settled solids can be discharged and recovered from the tank very easily. I can do it. In other words, by setting the height of the upper end of the discharge pipe 10 to be somewhat lower than the water level in the treatment tank, the precipitated solids can be continuously discharged by water pressure, and the solid content is relatively small. In the case of wastewater, the height of the drain pipe can be lowered to discharge the slurry all at once only when necessary. Such adjustment can be easily achieved by forming the discharge pipe end 10A from a highly flexible material. Furthermore, if the entire discharge pipe 10 is removed from the support part 10B and the end is pulled down significantly, the deposits in the tank can be discharged all at once together with the waste water, making cleaning and maintenance of the tank extremely easy.

As described above, the embodiments of the present invention are capable of continuously settling and separating suspended solids in wastewater with an extremely simple structure without requiring them to stand still for a long time. Moreover, this embodiment essentially does not require any chemical or biochemical means for its treatment or power for operation, and therefore - after installation, it usually requires little maintenance. , no adjustment is required.

In this example, the ss concentration of wastewater of about 200 ppm could be reduced to about 20 PPII regardless of its nature and type, and most of the suspended solids up to about 300 mesh could be removed.

However, according to the present invention, concentrated wastewater with a higher SSa degree (for example, livestock sewage with an s s of 10.000 or more)
A similar solid-liquid separation treatment can also be carried out by preliminarily diluting this with water as appropriate and then introducing it into the treatment tank. Furthermore, if the wastewater contains metal sludge or the like and requires coagulant treatment, the flocculated ice after such treatment can be treated in the same manner as in the treatment tank of the above embodiment.

The wastewater treated in the above example is of a level that allows direct discharge into rivers, etc., but in this example, it is treated with 1-water 1rI treatment that assumes the removal of sediment, etc., and microbial activation. When used as a pre-treatment device for wastewater treatment, the load on the original treatment device can be significantly reduced. Therefore, the present invention has a wide range of applications as a so-called solid-liquid separator or Shirafuna used not only in the treatment of wide-scale wastewater but also in general water treatment.
Although the present invention has been described with reference to an embodiment having a relatively small and compact cylindrical shape, the present invention can of course be implemented in various other forms depending on the application. For example, the processing tank is not limited to a cylindrical shape as shown in FIGS. 1 and 2, but may also have a prismatic shape with a square cross section. In this case, it is only necessary to change the cross sections of the processing tank 4 in FIG. 1 or, if necessary, the partition tube 6, settling pipe 8, etc., to concentric rectangular shapes.

Furthermore, the shape, size, and arrangement pitch of the through holes drilled in the settling pipe, as well as the gap and inclination angle of the lower end of the processing tank, etc., can be designed to have various dimensions and shapes as necessary.

FIGS. 3 and 4 show another embodiment of the invention suitable for treating relatively large volumes of industrial wastewater.

Among the parts shown in the embodiments of FIGS. 3 and 4, those indicated by the reference numerals corresponding to those in FIGS. 1 and 2 have the same functions as explained in the embodiments, respectively. In this embodiment, the water flow reversal and rise region formed between the partition tube 6 and the treatment tank 4 is divided by the separator 11 into a collection region 12 and a wastewater extraction region 13, each having a relatively large area. A shooter 14 is provided in the catchment area 12.

The manner in which the introduced wastewater is treated by the partition tube 6 and the settling pipe 8, etc., and the sedimented and separated slurry is taken out is basically the same as in the embodiment shown in FIGS. 1 and 2. It is.

In the embodiment of FIGS. 3 and 4, the waste water rising from the gap after separation of most of the suspended solids is first directed below the collection zone 12. Here, wood chips with a small specific gravity and, in some cases, oil, etc. contained in the wastewater rapidly float to the surface, are collected on the water surface of the collection area 12, and are discharged to the outside of the tank through the chute 14. The wastewater further gradually rises to reach the wastewater extraction area 13 and is discharged from the overflow spout 15.

This embodiment can treat a large amount of wastewater, and is particularly suitable for treating factory wastewater containing a large amount of floating matter with relatively low specific gravity such as wood chips and oils.

[Brief explanation of the drawing]

FIG. 1 is a top view of one embodiment of the present invention, FIG. 2 is a vertical sectional view of the embodiment, FIG. 3 is a two-sided view of another embodiment of the invention, and FIG. 4 is a top view of the embodiment. FIG. 3 is a longitudinal cross-sectional view of the embodiment. 169. Wastewater inlet 298. Wastewater overflow port 391
．． Sediment outlet 410. Processing tank 501. Sedimentation area
690. Partition tube 700. Reversal and rise area of water waves 810. Settling pipe 909. Through hole 10... Loss and output pipe patent applicant: Michiru Matsuoka, Minoru Takayasu, Figure 3, Figure 4, C4. 1-, -"-'l-" -[ 4:i:l 6 A Ibuki 17 (to"IOB

Claims (3)

[Claims] (1) A treatment tank having an inlet for treated water and an overflow port for treated wastewater at the upper end, and an outlet for suspended matter that has settled and separated from the treated water at the lower end. , which is installed vertically from the upper end to the lower end of the treatment tank and partitions the inside of the tank into a settling region of the water to be treated and a reversal rising region of the water flow after treatment, which communicates with the settling region near the lower end. a partition tube for partitioning, and a partition tube that is vertically disposed substantially concentrically with a radial gap inside the partition tube, with an upper end connected to the wastewater inlet and a lower end facing the suspended solids discharge port. 1. A wastewater treatment device comprising: a settling pipe which is open and has a number of through holes formed in its surrounding wall. (2) The wastewater treatment apparatus according to claim 1, characterized in that a discharge pipe whose height at the discharge end is adjustable is connected to the discharge port of the suspended solids in the treatment tank. (3) The above-mentioned patent characterized in that the tank wall at the lower end of the processing tank, which faces the vertical lower end of the partition tube through a communication gap, is inclined upward at a predetermined angle. A wastewater treatment device according to claim 1.