JPS60150811A - Continuous filter - Google Patents

Abstract

PURPOSE:To obtain a continuous filter of suspended water wherein a settling basin having broad area and mechanical power are unnecessary by utilizing a flow path such as a U-channel and a drainage pipe and filtrating the suspended water thereat. CONSTITUTION:A flow path 2 of filtered water is surrounded by two side faces 3, a bottom ace 4 and two horizontal faces of above face 5 and at least one part of the side face 3 is used as a filtration surface. The filtration surface is composed of a perforated or network metal, a thin plastic plate or a filter fabric supported with a supporting plate thereof. One part of water which flows through a flow path 6 of suspended water is filtered to filtrate the suspended matter on the side face 3 adjacent to said flow path 6 or further on the bottom face 4 and the above face 5, and the purified water is flowed into said flow path 2 of filtered water.

Description

[Detailed Description of the Invention] [Technical Field] The present invention removes suspended solids from a large amount of water in which earth and sand and other fine particles are suspended, such as rainwater, drilling water, industrial wastewater, sewage, etc., and improves water quality with less suspended solids. This invention relates to a continuous filtration device for suspended water that continuously and without using power.

[Prior art]

During civil engineering works such as tunnels and dams, groundwater that gushes out or flows out has a large amount of suspended earth and sand, and if it is discharged directly into a river, it becomes cloudy and causes various types of pollution. Drainage from ore processing and ceramics, which contains a large amount of suspended solids, also causes various types of pollution. For this reason, rainwater, excavation water, sewage, and the above-mentioned wastewater are treated by using a settling basin to remove a certain amount of all suspended matter and then discharging it into rivers. In order to do this, the settling basin becomes large and requires a vast area, which is inconvenient. A possible treatment method that does not require such an area is 7f:I filtration, but this method uses reduced pressure or increased pressure, and has the drawback of requiring power and being an expensive treatment method.

[Purpose of the invention]

In view of this situation, the purpose of the present invention is to utilize flow channels such as U-shaped grooves and drainage pipes to collect suspended water there, thereby creating a continuous stream of suspended water that does not require a vast area of settling ponds or power. F1
The objective is to provide a

[Structure of the invention]

That is, the gist of the present invention is to have one or more filtrate water flow paths parallel to the waterway partitioned by a plurality of side surfaces and a surface connecting them, and at least a part of the side surfaces is made of a porous plate and/or f. It is in a continuous filtration device made up of cloth.

The continuous filtration device of the present invention will be explained using Figure mk.

1 and 2 are schematic cross-sectional perspective views showing embodiments of the continuous filtration device of the present invention. FIG. 3 shows an example of one permeable flow path, and FIG. 4 shows an example of how to connect the side, bottom, and top surfaces in the flow direction.

In the drawings, 1 is the wall of the water channel, and 2 is the filtrate flow path. In FIG. 1, the filtrate flow path 2 is surrounded by two horizontal planes, ie, two side surfaces 3, a bottom surface 4, and a top surface 5.
An example in which three are installed is shown. These 1 overwater flow passages are installed in a floating manner within the water channel using suitable supports or beams (not shown), and the space other than the e overflow flow passages within the waterway becomes the suspended water flow path 6. In FIG. 2, the inside of the water channel is divided into a suspended water flow path 6 and a superfluous water flow path 2 by connecting the three groups of side surfaces and the lower and upper portions of the adjacent side surfaces alternately with horizontal partitions.

In FIG. 2, the sides and bottom form a mouthpiece, but the bottom may be omitted to form a V-shape. The channel walls and horizontal partitions are closely spaced to prevent the suspended water and filtered water from mixing. The horizontal partitions and channel walls at both ends may extend above the channel walls and be fixed there. This filtrate flow path is installed parallel to the waterway in the waterway, and the longer the length of the filtrate water flow path is, the more preferable it is because it can increase the filtration area. Although it depends on the concentration, it is generally preferable to have 30 toxins or more, and from the viewpoint of treatment efficiency and cost, 507)z to 2k.
More preferably, it is m. Needless to say, the upper limit of the length is limited by the length of the waterway in which the continuous filtration device is installed.

The suspension water flow channel 6 is a waterway as shown in Figs. 1 and 2, taking into account that unfiltered suspended matter may fall on the filter surface and accumulate, or be swept away by the suspension water flow and removed. Although it is preferable that the side be in contact with the bottom, the opposite arrangement may be possible depending on the quality of the suspension water.

1. In the superhydrous flow path 2, part of the water flowing through the suspended water flow path 6 enters the side surface 3 in contact with the flow path 6, or water that has been purified by separating suspended substances at the bottom surface 4 and top surface 5. come.

Hereinafter, the surface that performs this P separation will be referred to as a transient surface, but at least a part of the side surface 6 needs to be a filtering surface, and it is preferable that the entire side surface is a transient surface. For example, it is preferable that the upper surface 5 is also a polygonal surface.

The temporary surface is formed of a porous or mesh-like metal or resin thin plate (hereinafter referred to as a porous plate), or is formed of e-cloth supported by a C-cloth support plate.

The pore size of the porous plate, the mesh size, P, and the filtration percentage of the cloth vary depending on the quality of the suspended water to be treated and the required quality of 1- or 14-filtered water, and should be selected appropriately according to these requirements. good. As the fabric, any commercially available strand fabric can be used, but synthetic fiber filament fabrics such as polyester, polyolefin thread nylon/polyvinyl chloride, etc. are preferably used. Further, a filament J4 cloth having fluff on one side of the P cloth is preferably used.

Any material can be used as long as it can block most of the FA substances such as νIJ, Fl-surface sediment, etc., and obtain a suitable amount of 1% water, but the above-mentioned porous plate or I 'iP
Preferably, it is cloth.

An example of such a continuous filtration device is as shown in Fig. 3, which has a long concave cross-section with side and bottom sides formed of porous plates, and the tops of the sides are fitted with each other. Possible recesses and protrusions are formed. This porous plate can be used as it is, or by further placing F cloth on top of it and connecting it with the edge of P cloth by inserting the convex part 9 in the upper left of another similar set into the four parts 8 in the upper right. A filtrate water flow path having a concave portion can be formed.

A flat plate may be attached to the upper part of the side surface as a substitute for fitting into such irregularities, and the connection may be delayed by bolting or the like.

The continuous f-passage device may be formed by a single box or one water branch with a U-shaped cross section, but is the f-overcapacity number? In view of this, it is preferable that a plurality of box-shaped or U-shaped channels are installed in the water channel as shown in FIG. 1 or 2.

The wall forming the filtrate channel may be made of a single porous plate or P cloth from one end of the filtrate channel to the other, but from a practical point of view, for example, As shown in FIG. 4, it is preferable that several porous plates, fabrics, and their supports are connected along the flow direction, for example, with fittings 10, to constitute one permeable flow channel wall. Any method of combining may be used as long as significant mixing of the filtered water and suspended water does not occur. It is convenient for the installed VC that the length of one unit to be combined is 50 to 6.

The upstream end of the filtrate flow path may be connected to the upstream end of the waterway to be closed off, or a partition plate or the like may be used to separately block the end surface. Any method may be used as long as the suspended water does not enter the filtrate flow path 2 without being filtered, such as by attaching both sides at the end portions.

At the downstream end of the water flow path, the filtered water is suspended.
It is sufficient as long as it can be discharged, collected, and used without mixing with substance A.

The waterways in which the entire continuous filtration device of the present invention is installed can be of any shape, such as tubular waterways of various shapes, groove-type waterways with an open top, etc., but installation and maintenance are easy if they are U-shaped grooves. A U-shaped groove is preferable because if the lids are assembled, the top can be used for roads, etc., and there is virtually no space left that cannot be used for anything other than waterways.

A flow rate weir or a settling basin may be installed in the suspended water flow path downstream of the continuous filtering device of the present invention in the waterway. Even if this settling basin is provided, it may have a relatively small capacity.

The suspended water that has entered the suspended water flow path 6 is separated by F excess and sediment, etc., and flows through the 1 over water flow path 2 F, and is collected downstream and used or recovered. or discharged into rivers.

A part of the separated Dosunaji (f) remains in the e-retirement section, but most of it flows down the suspension water channel 6 along with the suspended water. When the flow rate of the suspension water f'i decreases or disappears, the soil and sand remaining in the excess quantity f dries and naturally falls from the excess quantity f into the suspension water channel.

This fallen sediment will be washed downstream and settle during the next flush.

In addition, if the F filtration surface is clogged with sediment, water with less sediment such as filtered water, well water, river water, etc. can be flowed to the filtrate water flow path side as necessary, and filtered from the I filtration surface to the suspended water flow path side. You may also perform backwashing.

Sediment that has been sorted can be collected and used as a landfill.

〔effect〕

The feature of the present invention is that it is possible to separate P by using the originally necessary water guide channel (channel) or by slightly increasing the cross-sectional area, without requiring a large area for e-filtration equipment or a settling basin. It has excellent economic and land use effects because it virtually does not require land by covering the waterway or burying the waterway underground.

〔Example〕

The present invention will be explained in more detail below using Examples.

Example 1 Five U-shaped grooves made of a perforated steel plate support with a side height of 750 mm and a bottom width of 4 cm in Fig. 2 are connected at the upper part of the side surface with a flat plate in a row arranged at equal intervals, and the outside thereof is F fabric made of polyester filament was densely layered on a support and placed in a U-shaped groove with a depth of 1 m throughout the cross section so that the lower part was located approximately 25 m from the bottom. A number of 15 m long units were manufactured, and these units were installed by connecting them to a sand basin about 1 km downstream from the upstream dam construction site, and the cloudy dam construction spring water was flushed at a rate of 10 m''/min. After removing suspended solids from the spring water, it passed through a filtered water channel and was collected in a water collection beet provided downstream.

-The turbidity of the excess water decreased and the visibility became over 30 mouths, so it was discharged directly into the river. Although the lower flow (suspended water) of the U-shaped groove was treated in a settling basin, the separation efficiency was still higher than when the continuous filtration device was not used at all, and the supernatant water had a visibility of 30 m or more and could be discharged in a short time.

After continuous water application for 1M, the amount of excess water was 7.
Since it had decreased to about 0%, spring water was passed through the filtrate flow path at a rate of 10 mj/hr for 30 minutes to backwash the entire f-recess and remove the dirt that had formed inside the cloth. When the water was passed to the lower layer again, the flow rate of 1 per water recovered to 96 cm, which was in the case of the first f-commerce.

Example 2 In residential areas on low-lying land, there is an attempt to minimize damage caused by flooding in residential areas by infiltrating rainwater into deep underground water layers as a drainage measure during heavy rains. They are installed vertically and horizontally to collect and discharge rainwater.

In the case of this infiltration method to the groundwater layer, it is possible to infiltrate and drain extremely efficiently at the beginning of rainfall, but soon the underground infiltration layer becomes clogged by the sediment accompanying the rainwater! This method has the disadvantage that the drainage efficiency rapidly decreases.

Two U-shaped road gutters in this residential area (cross-sectional area: 60 cm)
Parallel plate (width 45 m) made of porous resin plate with holes of 05 scale φ in the width (width 45 m)? Six 10 m long filtrate channels with a shape as shown in Figure 1, each consisting of a 4 m wide bottom and a side made of the same material, are installed parallel to the water channel at a distance of 10 crn from the water channel bottom. did.

In addition, the unit shown in Example 1 using a U-shaped groove with a lid measuring 11 x 1 m for 30 wells on each side for underground infiltration, which is one well per approximately 100 m square area, was installed, and the 60 sub-wells were installed in the filtrate water flow path of the unit. Filtered water from a 60 m U-shaped gutter flows into the suspension channel, and suspended water containing soil flows into the suspension channel. By installing this f-filtration device, the decrease in efficiency due to the scale of the underground permeation layer was significantly reduced, and semi-permanent V-drainage operation became possible. The amount of rainfall is about 1000-
By performing complete backwashing every time the condition reached a certain level, we were able to sufficiently recover the e-overperformance.

By fully introducing this equipment, the need for a settling basin with a storage capacity of several hours was no longer necessary, and a great economic effect was obtained in the effective use of residential areas.

Example 6 All of the wastewater after coagulation and sedimentation treatment from a factory that was conventionally treated in a large sedimentation tank with a retention time of 8 hours or more after coagulation and sedimentation treatment using a polymer flocculant A perforated steel plate with the same dimensions as in Example 1 was installed in a U-shaped groove with a cross-sectional area of 1 m x 1 m leading to the settling tank.
A unit made of thinned steel plates covered with a plain weave fabric made of polyethylene monofilament was installed over a total distance of 2 km, and a small sedimentation tank (residence time 30 minutes) was installed in place of the large sedimentation tank. The pH of the water and supernatant water from the shed settling tank is adjusted in the final adjustment tank, and the pH and
It was discharged into a river while measuring OC. Water quality is pH 6.5
~B, 0, TOC 15-20 pprn, colorless, and transparency was 55 cm or more. This not only eliminated the need for a large sedimentation tank, reducing equipment costs, but also allowed for effective use of the factory site, resulting in extremely large economic effects.

[Brief explanation of the drawing]

FIGS. 1 and 2 are schematic cross-sectional perspective views showing embodiments of the continuous one-pass device of the present invention. FIG. 3 shows an example of a lateral coupling method for the concave section of a continuous flow device, and FIG. 4 shows an example of a flow direction coupling method. 1 Channel wall 6 Suspended water flow path 2 Filtered water flow path 7 Porous plate 3 Side surface 8 Recessed portion 4 Bottom surface 9 Convex portion 5 Top surface 10 Fitting portion I Figure + 2 Figure 3 Figure + 4 Figure

Claims (1)

[Scope of Claims] 1) The water channel has an overwater flow path parallel to the water channel partitioned by a plurality of side surfaces and a surface connecting these, and at least a portion of the side surfaces are porous plates and/or l. Continuous f made up of cloth
device. 2) The continuous 1 filtration device according to claim 1, characterized in that the f-i filtration flow path and the bottom of the water channel are separated from each other.