JP2022001347A - Vibration type aggregator - Google Patents

Abstract

To provide a vibration type aggregator for producing aggregated sludge by stirring and mixing sludge flowing in a casing by vibration of a stirrer.SOLUTION: A vibration type aggregator includes: a cylindrical casing 2 having a stirrer 3 inside; a drive device 6 that vibrates the stirrer 3 up and down; a sludge supply pipe 4 connected to a lower part of the casing 2 to continuously supply sludge; a flocculant supply pipe 14 that is connected to the sludge supply pipe 4 or the lower part of the casing 2 and adds a flocculant to the sludge; and a discharge pipe 5 connected to an upper part of the casing 2 to discharge aggregated sludge, thereby good-quality aggregated sludge can be obtained by continuously aggregating the sludge.SELECTED DRAWING: Figure 1

Description

The present invention relates to a vibration type aggregating device used for aggregating sludge to be dehydrated in a water treatment facility or the like.

Conventionally, when sludge is dehydrated using a dehydrator such as a screw press or a belt press, a polymer flocculant or an inorganic flocculant is supplied to the sludge as a pretreatment operation and stirred and mixed by a coagulator to form flocs. It is well known to let them. A good quality floc is formed by uniformly mixing and reacting an appropriate amount of a flocculant in the sludge, and the sludge having formed a good quality floc improves the dehydration property and the efficiency of the dehydration treatment.
A coagulation device that stirs and mixes sludge and a coagulant with a swirling blade in a treatment tank is known as described in Patent Document 1.

Japanese Unexamined Patent Publication No. 05-192699

The aggregating device for swirling the stirring blade as in Patent Document 1 has a weak stirring and mixing effect, sludge is retained in the aggregating device for several minutes, and good quality flocs cannot be formed unless the aggregating agent and the aggregating agent are stirred and mixed. rice field. In addition, since it takes time to form flocs, it is necessary to provide a large casing to secure a residence time in order to continuously generate coagulated sludge.

The present invention provides a vibration-type aggregating device that rapidly agitates and mixes sludge supplied to a casing and an aggregating agent by vibrating a screw-type stirring blade provided in the casing up and down.

A cylindrical casing provided with a stirrer inside, a drive device that vibrates the stirrer up and down, a sludge supply pipe connected to the lower part of the casing to continuously supply sludge, and a sludge supply pipe or a lower part of the casing. By providing a coagulant supply pipe that adds a coagulant to the sludge and a discharge pipe that is connected to the upper part of the casing to discharge the coagulated sludge, the sludge is continuously agglomerated to obtain high-quality coagulated sludge. Can be done.

The stirring body is configured by winding a spiral stirring blade around a stirring shaft, and by connecting the stirring shaft and a driving device, sludge can be flowed by the stirring blade.

The stirring body is configured by vertically arranging a plurality of disk-shaped stirring blades on the stirring shaft, and by connecting the stirring shaft and the drive device, sludge can be flowed by the stirring blades.

By providing a partition plate projecting from the inner wall of the casing above and below the stirring blade and extending the partition plate to the vicinity of the stirring shaft, sludge can flow and be surely agitated and aggregated.

An upper lid that closes the upper end of the casing through which the stirring shaft penetrates, a bottom lid that closes the lower end of the casing, a support shaft that stands on the bottom lid, and an insertion that opens at the upper part of the support shaft and inserts the lower end of the stirring shaft. By providing a hole, the stirring shaft can be supported and vibration can be stabilized.

The cylinder of the casing is divided into a plurality of parts above and below the stirring body, and the plurality of cylinders are provided with flanges at both ends, so that the cylinder can be divided and the stirring body can be easily attached and detached.

According to the present invention, since the sludge in the casing and the coagulant repeatedly flow due to the vibration of the stirring body, the sludge can be generated in a short time while the sludge flows in the casing. Since the coagulated sludge can be generated in a short time, the time for staying in the casing can be shortened, and it is not necessary to provide a large coagulating device. The coagulant reacts efficiently with the sludge due to the vibration of the agitator, and high-quality coagulated flocs can be formed.

It is sectional drawing of the vibration type coagulation apparatus which concerns on this invention. Similarly, it is a cross-sectional view of a main part of a vibration type coagulant. It is a side view and a plan view of the stirring body which concerns on other embodiment of this invention. It is a schematic diagram of the vibration type coagulation apparatus which concerns on this invention. Similarly, it is a schematic diagram of a vibration type coagulant.

FIG. 1 is a cross-sectional view of the vibration type coagulant according to the present invention.
The vibration type aggregator 1 of the present invention is connected to a cylindrical casing 2, a stirring body 3 that can vibrate up and down inside the casing 2, a sludge supply pipe 4 connected to the lower part of the casing 2, and an upper part of the casing 2. A discharge pipe 5 for the aggregated sludge and a drive device 6 arranged outside the casing 2 to drive the agitator 3 are provided.

The stirring body 3 is composed of a stirring shaft 7 and a stirring blade 8 provided on the stirring shaft 7, and the stirring blade 8 is arranged along the inner peripheral surface of the casing 2. The casing 2 is composed of a cylinder 9, a bottom lid 10 that closes the lower end of the cylinder 9, and an upper lid 11 that closes the upper end of the cylinder 9. Sludge is supplied to the inside of the casing 2 from the sludge supply pipe 4 connected to the opening of the bottom lid 10, and aggregated sludge is discharged to the outside of the casing 2 from the discharge pipe 5 connected to the opening of the top lid 11. In this embodiment, the sludge supply pipe 4 and the discharge pipe 5 are connected to the bottom lid 10 and the upper lid 11, but the sludge supply pipe 4 is connected to the lower side wall of the cylinder 9 and the discharge pipe is connected to the upper side wall of the cylinder 9. 5 may be connected.

The upper end of the stirring shaft 7 penetrates the upper lid 11 and is connected to the drive device 6 provided outside the casing 2. The drive device 6 is arranged above the casing 2 and is composed of a drive device 12 and a crank mechanism 13. The crank mechanism 13 converts the rotation of the drive machine 12 into vertical vibration and transmits it to the stirring shaft 7 connected to the crank mechanism 13. The stirring body 3 vibrates up and down by the driving of the driving device 6. The sliding portion of the stirring shaft 7 and the upper lid 11 is sealed with a known sealing member.

A coagulant supply pipe 14 is connected to the sludge supply pipe 4, and the coagulant is added to the sludge to supply the coagulant together with the sludge into the casing 2. The sludge that has been stirred and mixed in the casing 2 reacts with the flocculant to form aggregate flocs. The sludge forming the aggregated flocs (aggregated sludge) is conveyed to the upper part of the casing 2 and discharged from the discharge pipe 5. The coagulant supply pipe 14 may be directly connected to the bottom lid 10 or the lower side surface of the cylinder 9 on the upstream side of the stirring body 3. As the flocculant, powder or liquid is added to the sludge. The sludge and the flocculant are continuously supplied into the casing 2 by a supply device (not shown).

FIG. 2 is a cross-sectional view of a main part of the vibration type coagulant according to the present invention.
The stirring body 3 is composed of a stirring shaft 7 and a stirring blade 8 wound around the stirring shaft 7, and in FIG. 2, a spiral screw blade is used as the stirring blade 8. A gap is provided between the outer edge of the stirring blade 8 and the inner wall of the casing 2 so that sludge can pass through. When the stirring body 3 vibrates up and down, sludge flows in the gap between the stirring blade 8 and the casing 2, and the sludge and the coagulant are stirred and mixed. Further, the stirring blade 8 is provided with a plurality of flow holes 15. The sludge passes through the flow hole 15 and flows due to the vibration of the stirring body 3, and the sludge and the flocculant are stirred and mixed.

When the gap between the stirring blade 8 and the casing 2 is set to a width of 2 to 4 mm, the residue in the sludge is not clogged, and if the area of the gap is narrower than the area of the flow hole 15, the vibration of the stirring body 3 causes the gap to pass through. A jet can be generated and sludge can flow.

A partition plate 16 projecting from the inner wall of the casing 2 is arranged above and below the stirring body 3. The partition plate 16 has a disk shape, and a through hole 17 through which the stirring shaft 7 penetrates is provided in the center. The inner circumference of the through hole 17 extends to the vicinity of the stirring shaft 7, and a predetermined gap through which sludge can pass is provided between the partition plate 16 and the stirring shaft 7. When the stirring body 3 vibrates up and down, sludge flows in the gap between the partition plate 16 and the stirring shaft 7, and the sludge and the flocculant are stirred and mixed.

In this embodiment, the tubular body 9 has a structure that can be divided into a plurality of parts above and below the stirring body 3. Flange 18s provided at both ends of the divided tubular body 9 are connected to each other. The partition plate 16 is arranged so as to be sandwiched between the flanges 18. By making the tubular body 9 separable, the stirring body 3 can be easily attached and detached, and maintainability is improved. In addition, the divided tubular body 9 and the stirring body 3 may be continuously provided to form a series multistage structure. Further, as shown in FIG. 1, the upper lid 11 and the bottom lid 10 may be detachably connected to the flanges 18 at the upper and lower ends of the tubular body 9 connected in multiple stages, but the flanges are attached to the upper and lower ends of the tubular body 9. The top lid 11 and the bottom lid 10 may be integrally connected by welding or the like without providing the 18.

A support shaft 19 is erected at the center of the upper part of the bottom lid 10, and an insertion hole 20 through which the stirring shaft 7 can be inserted is provided in the upper part of the support shaft 19. By inserting and supporting the stirring shaft 7 through the insertion hole 20 of the support shaft 19, the stirring body 3 is oscillated up and down. The stirring shaft 7 may be provided so as to penetrate the bottom lid 10. In that case, the support shaft 19 is provided at the lower part of the bottom lid 10 or is erected on a stand (not shown) provided outside the casing 2 to stir the shaft 7. May be supported. By supporting the stirring shaft 7 with the support shaft 19, the vibration of the stirring body 3 can be stabilized even with a highly viscous fluid such as sludge.

FIG. 3 is a side view and a plan view of the stirring body according to another embodiment of the present invention.
FIG. 3A is a stirring body 3 in which a spiral stirring blade 8 is wound around a stirring shaft 7. The stirring blade 8 is provided with a plurality of flow holes 15, and a plurality of notches 21 are provided on the outer edge of the stirring blade 8. Is provided. Due to the vibration of the stirring body 3, sludge flows through the flow hole 15 and the notch 21. The spiral stirring blade 8 is appropriately set according to sludge properties such as pitch and number of rows.

FIG. 3B is a stirring body 3 in which a plurality of disk-shaped stirring blades 8 are vertically arranged on the stirring shaft 7. The stirring blade 8 is provided with a plurality of flow holes 15 and a plurality of cuts are provided on the outer edge of the stirring blade 8. A notch 21 is provided. Due to the vibration of the stirring body 3, sludge flows through the flow hole 15 and the notch 21. The disk-shaped stirring blades 8 are appropriately set according to sludge properties such as the number of arrangements and intervals.

4 and 5 are schematic views of the vibration type coagulant according to the present invention.
The vibration type coagulation device 1 of the present invention is a device that continuously supplies sludge and a coagulant to continuously generate coagulation sludge, and a method for producing coagulation sludge using the vibration type coagulation device 1 is described in detail below. do.

FIG. 4A: First, sludge and a flocculant are continuously supplied from a sludge supply pipe 4 connected to the lower part of the casing 2. When the sludge and the flocculant are supplied, the gap between the partition plate 16a at the bottom of the casing 2 and the stirring shaft 7, the flow path of the spiral stirring blade 8, the flow hole 15 of the stirring blade 8, or the gap between the stirring blade 8 and the casing 2. Sludge and a flocculant flow into the casing 2 through the casing 2.

FIG. 4B: Next, the stirring blade 8 is moved upward by the driving device 6. The sludge and the flocculant are continuously supplied from the sludge supply pipe 4, and the liquid level rises. After that, sludge and coagulant will be continuously supplied. When the stirring blade 8 moves upward, the sludge and the flocculant contained in the stirring blade 8 rapidly flow upstream of the stirring blade 8 through the gap between the stirring blade 8 and the casing 2 and the flow hole 15 of the stirring blade 8. Transferred to the side. The sludge and the flocculant are rapidly transferred to flow and are agitated and mixed.

FIG. 5 (c): Next, the stirring blade 8 is moved downward by the driving device 6. When the stirring blade 8 moves downward, sludge and agglomerating agent on the downstream side of the partition plate 16a rapidly pass through the gap between the stirring blade 8 and the casing 2 or the flow hole 15 of the stirring blade 8 to the inside of the stirring blade 8. Will be transferred to. Further, the sludge and the flocculant contained in the stirring blade 8 are rapidly transferred to the downstream side of the stirring blade 8 through the gap between the stirring blade 8 and the casing 2 or the flow hole 15 of the stirring blade 8. Sludge and agglomerating agent are rapidly transferred to flow inside and downstream of the stirring blade 8 and are stirred and mixed.

FIG. 5 (d): Next, the stirring blade 8 is moved upward again by the driving device 6. When the stirring blade 8 moves upward, the sludge and the flocculant contained in the stirring blade 8 rapidly move upstream of the stirring blade 8 through the gap between the stirring blade 8 and the casing 2 and the flow hole 15 of the stirring blade 8. Transferred to the side. Further, the sludge and the flocculant on the downstream side of the stirring blade 8 are rapidly transferred to the inside of the stirring blade 8 through the gap between the stirring blade 8 and the casing 2 and the flow hole 15 of the stirring blade 8. Sludge and agglomerating agent are rapidly transferred to flow inside the stirring blade 8 on the upstream side, and are stirred and mixed. Since the sludge and the aggregating agent continue to be supplied, the agitated and mixed agglomerated sludge passes through the gap between the partition plate 16b and the stirring shaft 7 and flows out to the upper part of the partition plate 16b and is discharged from the discharge pipe 5.

As shown in FIGS. 4 and 5, the sludge and the flocculant are continuously supplied to the casing 2 to convey the sludge, and the sludge and the flocculant are frequently stirred and mixed by repeating the vertical vibration of the stirring body 3. Inside the casing 2, aggregated sludge is generated by stirring and mixing, and the aggregated sludge is discharged from the discharge pipe 5 connected to the upper lid 11 of the casing 2. Since a large flow occurs in the casing 2 due to the vibration of the stirring body 3, the sludge and the flocculant are sufficiently stirred and mixed in a short time while flowing through the casing 2, and high-quality coagulated sludge is produced.

2 Casing 3 Stirrer 4 Sludge supply pipe 6 Driver 7 Stirrer shaft 8 Stirrer blade 9 Cylindrical body 10 Bottom lid 11 Top lid 14 Coagulant supply device 16 Partition plate 18 Flange 19 Support shaft

Claims (6)

A cylindrical casing (2) having a stirrer (3) inside,
A drive device (6) that vibrates the agitator (3) up and down,
A sludge supply pipe (4) connected to the lower part of the casing (2) to continuously supply sludge,
A coagulant supply pipe (14) connected to the lower part of the sludge supply pipe (4) or the casing (2) to add a coagulant to the sludge, and a coagulant supply pipe (14).
A discharge pipe (5) connected to the upper part of the casing (2) to discharge aggregated sludge,
A vibration type coagulation device characterized by being provided with. The stirring body (3) is configured by winding a spiral stirring blade (8) around a stirring shaft (7).
The vibration type coagulation device according to claim 1, wherein the stirring shaft (7) and the drive device (6) are connected to each other. The stirring body (3) is configured by vertically arranging a plurality of disk-shaped stirring blades (8) on the stirring shaft (7).
The vibrating coagulation device according to claim 1, wherein the stirring shaft (7) and the driving device (12) are connected to each other. A partition plate (16) projecting from the inner wall of the casing (2) is provided above and below the stirring blade (8).
The vibrating coagulation device according to claim 2 or 3, wherein the partition plate (16) extends to the vicinity of the stirring shaft (7). An upper lid (11) through which the stirring shaft (7) penetrates and closes the upper end of the casing (2),
The bottom lid (10) that closes the lower end of the casing,
A support shaft (19) erected on the bottom lid (10) and
An insertion hole (20) that opens at the top of the support shaft (19) and inserts the lower end of the stirring shaft (7).
The vibration type coagulation device according to any one of claims 2 to 4, wherein the vibration type coagulation device is provided. The tubular body (9) of the casing (2) is divided into a plurality of parts above and below the stirring body (3).
The vibrating coagulation device according to any one of claims 1 to 5, wherein the plurality of cylinders (9) are provided with flanges (18) at both ends.

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