JP6730679B2 - Belt-running drum type concentrator - Google Patents

Description

This invention is a drum-type concentrator having a cylindrical filter body stretched around a transport spiral, and the filter body is composed of a freely movable belt, and a continuously stable concentrated sludge is obtained while cleaning the belt. The present invention relates to a belt-running drum type concentrator to be generated.

Conventionally, a belt-type concentrator or a drum-type concentrator for concentrating organic sludge such as sewage, night soil, or food processing wastewater is generally known. The belt type concentrator or the drum type concentrator is a device for continuously concentrating sludge, continuously supplying sludge to the device, and continuously discharging concentrated sludge from the device.

As disclosed in Patent Document 1, an endless belt made of resin is hung between sprockets, sludge is supplied onto a belt near one of the sprockets, and solid-liquid separation is carried out by the endless belt, and conveyed to the other sprockets. Belt-type concentrators for obtaining concentrated sludge by known methods are known.

As disclosed in Patent Document 2, in a cylindrical drum type dehydrator in which a spiral blade is surrounded by a filter cloth, sludge is supplied to rotate the cylindrical body, and solid-liquid separation is performed with the filter cloth. Meanwhile, a drum type concentrator that conveys concentrated sludge with a spiral blade is known.

JP, 2002-253910, A Japanese Utility Model Publication No. 56-44819

In the belt-type concentrator such as that of Patent Document 1, when solid-liquid separation is performed, it is stable when it has a long string shape such as algae or a complicated shape in which fiber components are entangled. Can not be concentrated. Specifically, sludge supplied on a horizontally installed belt does not change its posture on the belt while being concentrated. Cannot be filtered with a belt.

Further, in the concentrator in which the drum type cylindrical body is configured with a filter cloth as in Patent Document 2, it is necessary to wash the filter cloth against clogging. Although the compressed air is jetted from the outside of the cylindrical body to eliminate the clogging, compressed air has a low cleaning effect and the cost for electricity and the like increases.

There are other cases where the filter cloth is washed with washing water, but in order to wash the filter cloth from the outside of the cylindrical body, the washing water flows into the inside of the cylinder, so that the concentration operation must be stopped. There is also a problem that the water absorption of the liquid adsorbed in the sludge becomes poor due to the impregnation of the wash water with the filter cloth.

This invention combines the excellent functions of a belt-type concentrator and a drum-type concentrator in order to stably condense difficult-to-concentrate sludge. Provided is a belt-running drum type concentrator capable of continuously cleaning the filter medium.

The present invention, sludge is supplied to the interior of the surrounding filtration body as a drum belt stretched over body, in a belt traveling drum concentrator for concentrating the sludge while rotating the drum body, the spiral of the worm spiral, An outer ring with a lid at the front end of the spiral and an outer ring opened at the rear end of the spiral make up a rotatable drum body. a drum body internal supply for supplying sludge to the outer ring near the front end in the tube was so equipped and construed massaging sludge drum body, enabling efficient solid-liquid separation by varying the degree of compaction Becomes

In addition, the belt is configured in an endless form, and the washing device for washing the belt is provided while being wound around the spiral and the driving roll, so that continuous concentration operation can be performed while washing the belt (filter body). ..

Also, if a pair of return rolls is arranged above the spiral and the distance between the pair of return rolls is equal to or smaller than the diameter of the spiral, the sludge remaining on the belt is centered along the running of the belt from the bottom of the drum body. After being transported near the axis, it surely falls to the bottom due to its own weight. The liquid content inside the sludge is extracted to the surface by the action of detangling when sludge is dropped, and solid-liquid separation by the belt is promoted.

By using a supply pipe as the central axis and winding a spiral spiral around the central axis, there is no concern that sludge will overflow to the next stage during operation, and a large amount of treatment operation can be supported.

According to the present invention, since the filter body of the drum type concentrator is composed of the belt that can travel, the filter body (belt) can be continuously washed while the filter body is washed.
By running the belt and rotating the spiral, the sludge is disentangled in the drum body and the pressure density is changed to enable efficient solid-liquid separation.

1 is a schematic front view of a belt traveling type drum type concentrator according to the present invention. Similarly, it is a schematic vertical cross-sectional side view of a belt-running drum type concentrator. Similarly, it is a rear view of a belt running type drum type concentrator. It is a schematic front view of the belt running type drum type concentrator of Example 1 of another. It is a front view of the belt running type drum type concentrator of other Example 2. It is a front view of the belt running type drum type concentrator of other Example 3. It is a partial longitudinal side view of the belt running type drum type concentrator of other Example 4.

FIG. 1 is a schematic front view of a belt-running drum type concentrator. Plates outer peripheral end of the rotatable drum member 3 which is integrally formed on the ribbon-shaped hollow spiral 1 and the outer ring 6 which is formed into a spiral, the filtration body (belt 2) Ru winding Tei freely travel. The belt 2 is wound so as to cover and include the bottom of the spiral 1 on the horizontal axis. The belt 2 used as a filter may be a known band-shaped filter material that allows liquid to pass therethrough. Below the drum body 3, there is arranged a filtrate receiver 5 for storing or delivering the filtrate that has passed through the belt 2 and falls.

FIG. 2 is a schematic vertical sectional side view of the belt-traveling drum type concentrator. The front and rear ends of the spiral 1 are connected to the annular outer rings 6 and 6 to form a cylindrical drum body 3 . The outer ring 6 has a predetermined width in the axial direction in order to secure a running allowance at both ends of the belt 2.

The outer ring 6 at the front end is provided with a lid 7 so that the sludge inside does not leak. A sludge supply pipe 8 is inserted through the lid 7. The supply pipe 8 inserted from the lid 7 supplies the sludge to the vicinity of the outer ring 6 at the front end. The supply pipe 8 is connected to a supply device (not shown). The lid 7 does not have to cover the entire outer ring 6, and may have a height such that the sludge inside does not overflow.

A sprocket is formed on the outer ring 6 at the front end, and is connected to the spiral driving machine 10 by a chain 9. The outer rings 6, 6 and the spiral 1 at the front and rear ends are integrally rotatable. By the rotation of the spiral 1, the sludge supplied inside is filtered by the belt 2 which is wound around, while the concentrated sludge with reduced liquid content is conveyed toward the outer ring 6 at the rear end.
The outer ring 6 at the rear end is open, and the concentrated sludge is discharged to the concentrated sludge receiver 11 arranged below the outer ring 6.

FIG. 3 is a rear view of the belt traveling type drum type concentrator. Since the sludge supply pipe 8 is inserted through the opening 12 provided at the center of the lid 7, even if the lid 7 rotates integrally with the spiral 1, the supply pipe 8 is stably fixed in the drum body 3. Sludge can be supplied inside.

In the embodiment, the spiral 1 is rotatably driven by the chain 9, but a known joint such as a pulley or a gear can be used.

FIG. 4 is a schematic front view of a drum type concentrator according to another embodiment. The belt 2 may be run endlessly around the spiral 1 and the drive roll 14 as shown in FIG. 4A, and may be moved from one side to the other by the drive roll 14 as shown in FIG. 4B. It may be configured to be wound up.

FIG. 5 is a front view of a belt traveling type drum type concentrator of another embodiment 2, in which a pair of return rolls 13, 13 and a driving roll 14 and a driven roll 15 are arranged above the spiral 1. The belt 2 is wound around the inside of the return roll 13 and the outside of the drive roll 14 and the driven roll 15 and stretched endlessly. A roll driving machine (not shown) is connected to the drive roll 14, and the filter body formed by the endless belt 2 is configured to run by rotating the drive roll 14. A cleaning device 18 for cleaning the belt 2 is arranged between the drive roll 14 and the driven roll 15. In addition, the installation position of the cleaning device 18 is not limited to the above position, and a known method such as water/air injection or immersion may be used as a cleaning method. In addition, a cleaning liquid receiver is provided if necessary.

Below the drum body 3, a pair of support rolls 17 are disposed so as to be in sliding contact with the belt 2. The positions and the number of the support rolls 17 are appropriately arranged according to the diameter of the drum body 3, the amount of sludge supplied, and the like.

It should be noted that members that support the constituent requirements of the present apparatus, such as a frame, bearings, ribs, etc., are appropriately arranged according to the specifications and conditions.

The sludge is supplied to the vicinity of the outer ring 6 at the front end inside the drum body 3 via a supply pipe 8 by a sludge supply pump (not shown). The sludge supplied to the inside is permeated from the belt 2 by the gravity due to the concentration action.

The sludge remaining on the belt 2 is conveyed from the bottom of the drum 3 to a height near the central axis along the running of the belt 2, and then sludges to the bottom by its own weight. At this time, the liquid content inside the sludge is extracted on the surface by the action of mashing the sludge, and solid-liquid separation by the belt 2 is promoted.

The belt 2 wound around the spiral 1 travels upward so that sludge that follows the belt 2 in the drum body 3 is slid to the bottom by its own weight. It is desirable that the distance between the return rolls 13 and 13 be set to be equal to or smaller than the diameter of the spiral 1 and that the belt 2 be wound up above the central axis of the spiral 1. Further, the interval and height of the return roll 13 are appropriately set according to the winding angle of the belt 2, tension, and the like.

Independent of the running of the belt 2, the internal sludge is transported to the discharge side by the rotating action of the spiral spiral 1, and is also rubbed and is further concentrated during this period. The pitch of the spiral 1, the height of the flat plate, and the like are appropriately set according to the supply amount and the like so that the sludge to be conveyed does not overflow into the adjacent stage.

The degree of enrichment can be adjusted by controlling the rotation speed of the spiral 1 or the traveling speed of the belt 2.

When the rotation speed of the spiral 1 is slowed down, the retention time of the sludge inside becomes long and the degree of concentration becomes high. On the contrary, if the rotation speed of the spiral 1 is increased, the residence time of the sludge inside becomes shorter and the degree of concentration becomes lower.

If the traveling speed of the belt 2 is increased, the clogged portion will pass by early, and the sludge will come into contact with the belt 2 that does not contain a liquid content in a large proportion, resulting in a high concentration. On the contrary, when the traveling speed of the belt 2 is slowed down, the clogged portion stays for a long time, the ratio of sludge filtered by the belt 2 containing a large amount of liquid inside increases, and the degree of concentration decreases.

FIG. 6 is a front view of a belt-running drum type concentrator of another embodiment 3, in which two drum bodies 3 and 3 are arranged side by side and one endless belt 2 is used as two drums. It is hung around the body 3, 3.

The belt 2 is wound around one spiral 1 and reversed by the return roll 13 above it, and then it is wound around the other spiral 1 through the return roll 13 above the other spiral 1 and from each return roll 13. It is wound around the drive roll 14 and the driven roll 15.

The belt 2 travels between the plurality of spirals 1 and 1 by driving the driving roll 14 with a roll driving machine.

For the rotation of the spiral 1, independent spiral drivers 10, 10 may be connected to each other, or the spirals 1, 1 arranged side by side may be connected by a chain 9 of one roll to form a single spiral driver 10. You may rotate at the same time.

FIG. 7 is a partial vertical cross-sectional side view of a belt-running drum type concentrator of Example 4, in which a spiral spiral 1a is attached to a central shaft 19 instead of a ribbon-shaped hollow spiral formed of a flat plate. It may be formed by winding. In this case, the central shaft 19 may be extended from the drum body 3 and the central shaft 19 may be connected to the spiral driving machine 10.

For supplying sludge, the central shaft 19 is hollow and the sludge supply pipe 8 is also used. The supply port 20 is opened near the outer ring 6 at the front edge of the central shaft 19. By winding the spiral spiral 1a around the central shaft 18, there is no fear of overflow of sludge to the next stage.

The belt-running drum type concentrator according to the present invention is a device capable of continuously concentrating sludge containing solid matters having a complicated shape. For example, sludge in the form of a long string or sludge in which fibers are entangled can be stably concentrated, and there is no load on the dehydration treatment by a screw press or belt press in the subsequent stage, and overall management is possible. It improves the sex.

1, 1a spiral 2 belt 3 drum body 6 outer ring 8 supply pipe 13 return roll 14 drive roll 18 cleaning device 19 central shaft

Claims (4)

A belt-running drum type concentrator for supplying sludge to the inside of a drum body (3) around which a belt (2) is stretched as a filter body and concentrating sludge while rotating the drum body (3) ,
Spiral (1) of the screw spiral, the outer ring (6) provided with a lid (7) at the front end of the spiral (1), and open outer ring rear portion of the spiral (1) (6), To make a rotatable drum body (3),
A belt (2) that can run freely around the spiral (1),
A belt outer ring (6) supply pipe for supplying sludge to the vicinity inside the front end portion of the wound was drum body (2) (3) (8),
A belt-running drum-type concentrator, which is equipped with.
The belt (2) is configured to be endless, and is wound around the spiral (1) and the drive roll (14),
The belt-running drum type concentrator according to claim 1, further comprising a cleaning device (18) for cleaning the belt (2).
A pair of return rolls (13, 13) are arranged above the spiral (1),
The belt-running drum type concentrator according to claim 1 or 2, wherein the distance between the return rolls (13, 13) is set to be equal to or less than the diameter of the spiral (1).
The supply pipe ( 8 ) is the central axis (19),
The belt-running drum type concentrator according to any one of claims 1 to 3, wherein a spiral spiral (1a) is wound around the central shaft (19).

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