JPS6229043Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a sedimentation separation apparatus, for example, to an apparatus for sedimentation and separation of fine particles such as sludge from sewage such as factory waste liquid or other liquids.

[Technical background of the invention and its problems]

This type of conventional sedimentation separator was developed in 1983.
As shown in Publication No. 35366, the treated water flowing into the interior from the upper part of the main body container is brought into contact with the outer circumferential surface of a plurality of conical aggregation plates that are provided inside the main body container and whose diameter gradually increases downward. By lowering the treated water, fine particles in the treated water are coagulated and settled in the sedimentation tank body at the bottom of the main container, and the purified clear water is raised through the innermost coagulation plate and discharged to the outside. Both the main container and the aggregation plate inside thereof are formed in a conical shape with the same inclination angle so that equally spaced conical flow passages are formed between the main container and the aggregation plate therein.

Then, as the flow path goes downward, the cross-sectional area gradually expands due to the change in diameter.
The descending speed of the treated water in this flow path gradually slows down, and the fine particles such as sludge floating in this treated water are combined with each other on the aggregation plate, causing an interference coagulation effect, and only these fine particles are brought to the bottom of the aggregation plate. However, in order to perform the particle separation effect by flocculation, it is essential to mix a flocculant into the treated water. was not yet reached.

[Purpose of invention]

The present invention aims to further improve the above-mentioned conventional sedimentation separator to increase its capacity to the extent that effective particulate flocculation and separation action can be obtained without mixing a flocculant into the treated water.

[Summary of the idea]

The sedimentation separator of the present invention allows the treated water that flows into the interior from the upper part of the main container to come into contact with the outer circumferential surface of a plurality of conical agglomeration plates that are provided inside the main container and whose diameter gradually increases. In a sedimentation separation device that aggregates fine particles in the treated water and causes them to settle in a sedimentation tank body at the bottom of the main container by lowering the water, while raising the purified clear water through the inside of the innermost agglomeration plate and discharging it to the outside. The main body container includes an upper conical part of the main body which is located on the outer circumferential side of the upper half of the plurality of aggregation plates and whose diameter is gradually enlarged with a gentle slope than the aggregation plates, and a lower part of the upper conical part of the main body. A main body intermediate cylindrical portion that is continuously provided and located on the outer circumferential side of the lower half of the aggregation plate, and a main body lower conical portion that is continuously provided at the bottom of the main body intermediate cylindrical portion and has a diameter that is gradually reduced downward. The flow path formed between the upper conical part of the main body and the aggregation plate is arranged such that the interval gradually increases as it goes downward. The rate of descent of the water slows down even more,
During this time, sufficient sedimentation time is ensured to further promote the interference aggregation action of the fine particles on the surface of the aggregation plate.

[Example of review committee]

Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings.

As shown in FIG. 1, 1 is a main body container, and this main body container 1 has an upper conical part 2 whose diameter gradually increases downward, and an intermediate cylindrical part 3 integrally formed at the lower part of the conical part 2. The main body lower conical part 4 is connected to the lower part of the cylindrical part 3 by a flange and has a diameter that gradually decreases downward. Further, a sedimentation tank body 5 is flange-connected to the lower part of the lower conical portion 4 of the main body. Further, a rutting glass 6 is provided on one side of the lower conical portion 4 of the main body.

Further, the sedimentation tank body 5 includes a cylindrical portion 8 having a larger diameter than the lower end opening 7 of the lower conical portion 4 of the main body, and a conical portion integrally formed at the lower part of the cylindrical portion 8 and gradually decreasing in diameter toward the bottom. 9, and an agglomerated particle outlet section 10 provided at the lower end of the conical section 9.

Further, conical agglomeration plates 11, 12, 1 are formed inside the main body upper conical part 2 to the main body middle cylindrical part 3 with diameters gradually increasing downward.
3 are attached via mounting members 14, 15, 16, respectively, and a conical flow path 17 is defined between each of the aggregation plates 11, 12, 13, and the outermost aggregation plate 13 and the main body A conical flow path 18 is defined between the upper conical portion 2 and the upper conical portion 2 with gradually increasing intervals. This is the upper conical part 2 of the main body.
This is because the interference aggregation plates 11, 12, and 13 are provided with a gentler slope.

Further, a cylindrical inflow tank body 21 is integrally provided at the upper part of the upper conical part 2 of the main body, and the upper surface of this tank body 21 is open to the atmosphere. Further, a guide body 22 having a small diameter cylindrical shape and concentric with the inflow tank body 21 is integrally formed at the upper end of the upper conical portion 2 of the main body, and a support member 22 is provided at the upper end inflow opening of the guide body 22.
3 is fixed, and the tank body 21 and the guide body 22 are
A guide path 24 with an open top is formed between the two. Further, a liquid supply port 25 for introducing a processing liquid from the outside to this guide path 24 is connected in a tangential direction as shown in FIG.

Further, a discharge guide cylinder 27 is integrally fitted into the small diameter opening 26 at the upper end of the aggregation plate 11.
7 has an exhaust port 28 formed at the upper end and a clear water discharge port 29 drawn out on the side,
This discharge port 29 is drawn out to the outside of the inflow tank body 21 by a draw-out pipe 30 which is flange-connected to the discharge port 29 .

Next, the operation of the above embodiment will be explained. When a treated water storage tank (not shown) is connected to the liquid supply port body 25 via a pipe or the like, and treated water (for example, factory waste liquid, etc.) is introduced into the inflow tank body 21 from the liquid supply port body 25,
This treated water is introduced into the guideway 24, and as it swirls in the guideway 24, its water level gradually rises and finally overflows inwardly in a well-balanced manner from the edges between the openings at the upper end of the guide body 22, and The flow path 1 in the body upper conical part 2 through the body 22
7, 18, and flows down around the entire circumference of these flow passages 17, 18. When the downward flow rate of the treated water slows down as the flow passages 17 and 18 expand downward, fine particles such as sludge floating in the treated water will interfere with the surfaces of the agglomeration plates 11, 12 and 13.
Due to the agglomeration effect in which particles are bound together by trapping, the particles become large and are separated from the water stream.

In particular, the main body conical part 2 and the aggregation plates 11, 12, 13
The distance between the Sufficient settling time is ensured, and the mutual aggregation of the particles is effectively achieved not only on the surfaces of the aggregation plates 11, 12, and 13 but also on the inner wall surface of the intermediate cylindrical portion 3 of the main body.

In this way, the fine particles captured and mutually aggregated on the surfaces of the aggregation plates 11, 12, 13 and the inner wall surface of the intermediate cylindrical portion 3 of the main body further slide on the conical surface of the lower conical portion 4 of the main body, and are transferred to the agglomerated particle settling tank. It is collected in the body 5 and later discharged from the outlet part 10 at its lower end.

In this case, since the tank body 5 has a cylindrical part 8 formed at the upper part, the separated aggregated particles smoothly flow down into the conical part 9, and at the same time, they precipitate at a high concentration.

On the other hand, the supernatant liquid from which fine particles have been removed slowly rises within the innermost aggregation plate 11 and is discharged from the clear water outlet 29 of the discharge guide cylinder 27. Further, the exhaust gas is discharged from the exhaust port 28.

If a coagulant is mixed into the treated water, the coagulation and separation effect of fine particles can be further enhanced.

[Effect of idea]

According to the present invention, the main body upper conical portion is located on the outer circumferential side of the upper half of the aggregation plate inside the main body container and is formed with a diameter gradually increasing in a shape of a gentle slope than the aggregation plate, and this main body upper conical portion a main body intermediate cylindrical part that is continuously provided at the lower part of the main body and located on the outer circumferential side of the lower half of the aggregation plate; Since the main body container is formed into a special shape by the side conical part, the interval between the conical flow passages formed between the main body upper conical part and the aggregation plate gradually increases as it goes downward. Therefore, the descending speed of the treated water is significantly slowed down inside the upper conical part of the main body, and in this part, the mutual aggregation of fine particles due to interference between the surface of the aggregation plate and the inner wall surface of the middle cylindrical part of the main body becomes effective. As a result, the processing capacity was able to be increased to the extent that the necessary particulate coagulation and separation effect could be obtained without mixing a coagulant into the treated water.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the sedimentation separation apparatus of the present invention, and FIG. 2 is a plan view thereof. 1... Main body container, 2... Main body upper conical part, 3...
...Main body intermediate cylindrical part, 4...Main body lower conical part, 5...
... Sedimentation tank body, 11, 12, 13... Coagulation plate.

Claims (1)

[Scope of utility model registration request] The treated water that flows into the interior from the top of the main container is
By lowering the conical agglomeration plates provided inside the main container while coming into contact with the outer circumferential surface of a plurality of conical agglomeration plates whose diameters are gradually expanded downward, fine particles in the treated water are agglomerated, and the sedimentation tank at the bottom of the main container is In the sedimentation separation device, the purified clear water rises through the innermost aggregation plate and is discharged to the outside, and the main body container is located on the outer peripheral side of the upper half of the plurality of aggregation plates. An upper conical part of the main body whose diameter is gradually expanded in a shape of a gentler slope than the aggregation plate, and an intermediate cylinder of the main body that is continuously provided at the lower part of the upper conical part of the main body and located on the outer circumferential side of the lower half of the aggregation plate. 1. A sedimentation separator comprising a main body lower conical part which is continuously provided at the lower part of the main body intermediate cylindrical part and whose diameter is gradually reduced downward.