JP2000000408A - Device for dehydrating and sending muddy water under pressure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for efficiently dehydrating and sending a muddy water under pressure by concentrating the dilute muddy water. SOLUTION: This device is provided with a rotary drum 10, a rotating roller 12, a filter tube 14, a water collecting trough 16 and a water collecting tank 18. The rotary drum 10 is made into a disk, and a driving motor is connected on the center axis of the drum. Plural supporting arms 20 radially extended from the center are isogonally provided to the drum 10. The rotating rollers 12 are supported rotatably on the tip of the supporting arm 20. Further, a spring 22 is furnished in the respective supporting arms 20, and the rotating roller 12 is energized by the spring 22 outside the drum 10. The solid in the muddy water is not permeated from the hollow filter tube 14, only the water is permeated from the tube, and the tube is composed of the elastically deformable reticular pipe of steel wire, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for dehydrating and pumping muddy water, and more particularly to a device for dehydrating and pumping muddy water used for underground continuous wall construction and dredged muddy water in lakes and marshes. is there.

[0002]

2. Description of the Related Art Muddy water is used in the underground continuous wall method, the muddy water shield method, the cast-in-place method, etc. to stabilize the excavated ground. Dredging mud also occurs in dredging works for lakes, marshes, rivers, and the like.

[0003] In the underground diaphragm wall method or the like, such mud is recovered from the inside of an excavation hole and separated into mud and sediment. Then, the mud is reused.
Landfilling and other treatments are carried out with a reduced water content by a filter press, and dredged soil is also disposed of with a reduced water content.

The filter press used for such a purpose is usually to feed muddy water under pressure into a bag-shaped filtering chamber, apply pressure in the filtering chamber, compress and dewater, and separate solid matter and filtered water. Batch processing is common.

However, such a conventional method for treating muddy water has the following technical problems.

[0006]

That is, in the batch type muddy water treatment using a filter press, the muddy water treatment capacity is determined by the volume of the muddy water pumped into the filtration chamber in one cycle.

However, when muddy water having a high water content and a low concentration is treated, such muddy water has a small solid content and almost all of the water content. Is constant irrespective of the water content, so that the treatment efficiency is reduced.

For this reason, conventionally, such muddy water treatment has been dealt with by using a plurality of filter presses, but there has been a problem that equipment and operating costs are increased.

The present invention has been made in view of such conventional problems, and an object of the present invention is to increase the concentration of low-concentration muddy water so that the subsequent treatment can be efficiently performed. An object of the present invention is to provide a muddy water dewatering and pumping device that can be used.

[0010]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a rotating drum which is driven to rotate, and is rotatably attached to a tip of a support arm extending radially of the rotating drum. A plurality of rotating rollers that rotate together with the rotating drum and are urged to protrude outward from the rotating drum, and an elastically deformable filter tube that is curved and arranged along the outer periphery of the rotating roller. The muddy water supplied from one end of the filter pipe is elastically deformed by pressing and rotating the rotating roller to dewater the muddy water, and the dewatered muddy water is supplied to the other end of the filter pipe. Side. According to the muddy water dewatering and pressure feeding device configured as described above, the filter tube is elastically deformed by the pressing rotation of the rotating roller,
Since the water in the muddy water is dehydrated, it is possible to increase the concentration of the muddy water, and the subsequent processing can be performed efficiently. Further, the apparatus having the above-described configuration is configured such that the filter tube is elastically deformed by the pressing and rotating of the rotating roller and the dewatered muddy water is pressure-fed to the other end side of the filter tube. Can be used. The mud water dewatering and pumping device is provided along the outer periphery of the filter tube, and is disposed below the water collecting gutter for supporting the filter tube from outside,
And a water collecting tank for storing the filtered water discharged from the filter tube. According to this configuration, the filtered water dewatered from the filter tube can be taken out of the water collecting tank and reused as a stable liquid in, for example, an underground continuous wall construction method.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG.
1 shows an embodiment of a mud water dewatering and pumping apparatus according to the present invention. The dewatering / pressing device shown in FIG. 1 includes a rotating drum 10, a plurality of rotating rollers 12, and a filter tube 14.
, A water collecting gutter 16, and a water collecting tank 18.

The rotary drum 10 is formed in a disk shape, and a drive motor (not shown) is connected to a center axis thereof. A plurality of support arms 20 extending in the radial direction from the center are arranged at equal angular intervals on the rotating drum 10.

In this embodiment, the support arm 20 is
A total of 8 at 45 ° intervals with respect to the center of the rotating drum 10
Book is provided. A rotating roller 12 is rotatably supported at the tip of each support arm 20.

Each support arm 20 is provided with a spring 22 composed of a compression coil spring. The spring 22 constantly urges the rotating roller 12 toward the outside of the rotating drum 10. ing.

The filter tube 14 is a hollow tube that blocks the permeation of solids in muddy water and allows only water to permeate.
It is composed of a steel wire net pipe, a synthetic resin net pipe, a synthetic resin perforated pipe, and the like.

The filter tube 14 has the property of being elastically deformed when subjected to an external force, changing the shape of the cross-sectional area, and returning to a circular cross-section when the external force is removed.

If the filter tube 14 can be elastically deformed, a non-woven fabric,
It may have a multilayer structure in which a woven fabric, a water-permeable synthetic resin sheet, or the like is adhered.

The filter tube 14 is provided along the rotation trajectory of the rotating roller 12, and has a curved portion curved in an arc at an angular interval of about 180 °. The relationship between the center line of the curved portion and the rotation locus of the outer peripheral edge of the rotating roller 12 is set so that the rotation locus of the rotating roller 12 is outside the center line of the curved portion.

The relative positional relationship between the center line of such a curved portion and the rotation locus of the outer peripheral edge of the rotating roller 12 is determined by adjusting the pressing force of the spring 22 so that the rotating roller 12 It can be set arbitrarily within the range of deformation.

That is, when the water content of the muddy water A to be dewatered and pumped by the apparatus of this embodiment is very large, the rotation locus of the outer peripheral edge of the rotating roller 12 is positioned outside the center line of the curved portion. When the water content ratio is relatively small, the rotation trajectory of the outer peripheral edge of the rotating roller 12 is adjusted so as to be located inside the center line of the curved portion.

The filter tube 14 constructed as described above
Is a mud pipe 24 flanged to one end of the curved portion.
Are connected to each other, and a drain pipe 26 is connected to the other end.

The water collecting gutter 16 is a hollow body curved with the same curvature as the filter tube 14 and is provided so as to cover the outer periphery of the curved portion of the filter tube 14 from below.
The curved portion of the filter tube 14 is supported from outside.

The surface of the water collecting gutter 16 which is in contact with the filter tube 14 is provided with a linear through hole extending along a curve so as to receive the filtered water B discharged from the filter tube 14. Has become.

Below the water collecting gutter 16, a container-shaped water collecting tank 18 is provided. The filtered water B received by the water collecting gutter 16 is stored in the water collecting tank 18 through the through hole of the water collecting gutter 16. An outlet pipe 28 for reusing the collected filtered water B is provided in a lower part of the water collecting tank 18.

In the muddy water dewatering / pumping apparatus constructed as described above, the rotary drum 10 is rotationally driven and housed in a filter pipe 14 through a mud feeding pipe 24 in a tank (not shown). When the treated muddy water A is fed, the rotating roller 12 urged in a direction protruding outward by the spring 22 rotates with the rotation of the rotating drum 10 and comes into contact with the filter tube 14.

At this time, since the outside of the filter tube 14 is supported by the water collecting gutter 16, when receiving the urging force, the filter tube 14 is elastically deformed and compressed so that its cross section becomes flat.

When the filter tube 14 is compressed and deformed in this manner, the muddy water A fed into the filter tube is separated into water and solids, and only the water is discharged to the collecting gutter 16 side. In the process of such compression deformation, a plurality of rotating rollers 12 are provided, and each rotating roller 12 rotates on its own.
Since it rotates together with the rotating drum 10, the rotating drum 10
Are generated at a plurality of positions along the rotation direction of
With the rotation and rotation of, it sequentially moves along the rotation direction.

The muddy water dehydrated in this manner is highly concentrated, sent to the drainage pipe 26 under pressure, and then sent into the filtration chamber of the filter press. The filtered water collected in the water collecting tank 18 is, for example, collected from the extraction pipe 28 and reused if the treated mud is a stable liquid used in the underground continuous wall method.

The dehydration of the muddy water constructed as described above,
According to the pressure feeding device, by the pressing rotation of the rotating roller 12,
Since the water in the muddy water A is dehydrated by elastically deforming the filter tube 14, it is possible to increase the concentration of the muddy water A, and the subsequent processing, for example, the dehydration processing by a filter press can be efficiently performed. Even when treating muddy water A having a low concentration and a high water content, it is not necessary to use a plurality of filter presses.

Further, the apparatus having the above-described configuration is configured such that the rotating roller 1
Since the filter tube 14 is elastically deformed by the pressing rotation of 2 and the dewatered muddy water is pumped to the other end side of the filter tube 14, it can be used as, for example, a pump for feeding muddy water to a filter press.

In the above embodiment, the filter tube 14
The case where the water collecting gutter 16 for supporting the water collecting gutter from the outside is provided on the outer periphery of the filter tube 14 is illustrated. However, when the rigidity of the filter tube 14 is relatively large, the water collecting gutter 16 is not necessarily used.

[0032]

As described above in detail in the embodiments,
ADVANTAGE OF THE INVENTION According to the muddy water dewatering and pumping apparatus of this invention, since the muddy water can be highly concentrated, the subsequent processing can be performed efficiently.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing one embodiment of a muddy water dewatering and pumping device according to the present invention.

[Explanation of symbols]

 Reference Signs List 10 rotating drum 12 rotating roller 14 filter tube 16 water collecting gutter 18 water collecting tank 20 support arm 22 spring

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (Reference) B30B 9/20 B01D 29/42 520

Claims (2)

[Claims] 1. A rotating drum that is driven to rotate, and rotatably attached to a tip of a support arm extending in a radial direction of the rotating drum, rotates together with the rotating drum, and protrudes outward from the rotating drum. A plurality of rotating rollers urged so as to be provided, and an elastically deformable filter tube curved and arranged along the outer periphery of the rotating roller, wherein muddy water supplied from one end of the filter tube is supplied to the rotating roller. A dewatering and pumping apparatus for muddy water, wherein the water in the muddy water is dewatered by pressing and rotating the filter pipe to elastically deform the water, and the dewatered muddy water is pumped to the other end of the filter pipe. 2. A water collection gutter provided along an outer periphery of the filter tube and supporting the filter tube from outside, and a filter water disposed below the water collection gutter and discharged from the filter tube. 2. The dewatering and pumping device for muddy water according to claim 1, further comprising a water collecting tank for accommodating the water.