JP2000167312A - Filtration tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a filtration tank for efficiently purifying turbid water and sedimenting only a suspended substance. SOLUTION: A plurality of filter parts 7 having hollow interiors are provided in the filtration tank main body 1 equipped with a screw conveyor part appropriately discharging the suspended substance sedimented on the bottom part and, in such a state that the filter parts 7 are always dipped in turbid water, only purified water permeated through the hollow parts of the filter parts 7 is collected in a water tank 11 and drained from a drain tank 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filtration tank for filtering turbid water containing soil due to sewage drainage or underground construction on site.

[0002]

2. Description of the Related Art In recent years, treatment of muddy water discharged by sewer piping work and river improvement work has become a problem. Especially in Okinawa Prefecture, regulations on water turbidity and the like are becoming increasingly strict, with the regulations prohibiting runoff of red soil etc. being promulgated.

[0003] The fine suspended substance which causes turbidity and color of water is mainly colloidal particles. However, colloidal particles have a problem that the sedimentation speed in water is very slow. A method has been adopted in which a fine suspended substance is aggregated by stirring to accelerate the separation from water.

As a turbid water treatment step, as shown in FIG. 8, turbid water d is sucked from a turbid water storage area a by a submersible pump b into a flocculant injection and stirring apparatus c, and the flocculant is injected by the flocculant injection and stirring apparatus c. The water is fed to the sedimentation tank e with stirring while being added, and the contaminants are coagulated and settled in the sedimentation tank e to discharge fresh water.

[0005]

However, the above-mentioned treatment process is effective in large-scale construction or when there is a sufficient installation place, but in small-scale construction or when there is not enough installation place, the sedimentation tank is used. There is a problem that it is necessary to reduce the size and purify the efficiency. Therefore, an object of the present invention is to provide a filtration tank that purifies turbid water efficiently and solves only the suspended matter in order to solve the above problems.

[0006]

The above object of the present invention can be achieved by a septic tank having the following structure. That is, the gist of the present invention is that a plurality of filter units having a hollow inside are laid in a filter tank body provided with a means for appropriately discharging the suspended matter settled at the bottom, and the filter units are constantly submerged in muddy water. A filtration tank wherein only purified water permeated into the hollow of each filter section is collected and drained. The filter portion has a required number of water holes formed in the inner wall of the frame portion having a hollow inside so as to communicate with the inside of the hollow portion, and a drain port is provided at one end of the frame portion. In addition, the frame portion is filled with a synthetic resin fiber material such as hemimarone as a reinforcing material, and is interposed by a filter member using a carpet.

[0007]

According to the present invention, as shown in FIGS. 6 and 7, each of the filter portions 7 submerged in the filtration tank main body 1 by the injected turbid water B is used when the turbid water B passes through the filtration members 15 and 15. Only the suspension C contained in B is the filtration member 15,
The water D that has adhered to the surface 15 and has been filtered flows into the space A of the filter unit 7,
13. The water passes through the inside of the frame portion 12 and is discharged from the drainage ports 8 and 8 into the water storage tank 11.

The filtered water D stored in the water storage tank 11
Is set slightly higher than the height of the filter section 7 by the partition plate 9, so that the filter section 7 can always maintain a submerged state. Also, the filtering member 15,
The suspension C adhered to the surface 15 is peeled and dropped by its own weight and is discharged by the screw conveyor unit 2.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings showing the embodiments. 1 to 3
As shown in FIG. 2, the filtration tank main body 1 is provided with a screw conveyor section 2 for discharging a settled suspension at the bottom.

The screw conveyor unit 2 is a mechanism that can be driven and rotated by connecting a sprocket 4 mounted on a drive shaft of a drive motor 3 and a sprocket 4 mounted on the screw conveyor unit 2 with a chain 5. This is a mechanism for appropriately discharging by a ball valve portion 6 provided at the discharge end of the portion 2.

Next, above the screw conveyor section 2, filter sections 7, 7,.
The drain ports 8 for discharging the turbid water filtered in the filter section 7 are connected to the filter section 7.
Is provided so as to protrude from one end side of the device.

Further, the drain ports 8 and 8 are configured to be connected to a water storage tank 11 which is in communication with a drain tank 10 by a partition plate 9. Partition plate 9 of this water storage tank 11
The height is set to be slightly higher than the height of the filter unit 7 so that the filter unit 7 can always be kept submerged.

A drain valve 10a is provided below the drain tank 10.
And a mechanism for discharging the filtered water appropriately filtered by the filter unit 7 by the drain valve 10a.

Therefore, as shown in FIG. 4, the filter 7 has a structure in which water holes 13, 13,... Are provided at regular intervals in the inner wall surface of a frame 12 having a hollow interior. You.
Further, since the drain ports 8 are communicated with the hollow interior of the frame portion 12, the water flowing from the water holes 13 passes through the frame portion 12 and is discharged from the drain ports 8, 8. It is assumed that.

A space between the frame portions 12 is filled with a synthetic resin fiber material 14 such as hemitalone, and the frame portions 12 are interposed by filtering members 15 using carpet or the like. As shown in FIG. 5, the synthetic resin fiber material 14 is a reinforcing material for preventing the filtering members 15, 15 of the filter unit 7 from being depressed toward the space A between the frame units 12 by water pressure to prevent a reduction in purification processing capacity. is there.

[0016]

As described above, according to the present invention, the filtration capacity can be adjusted by the number of filter portions and the surface area of the filtration member. In addition, since the suspended matter adhering to the surface of the filtering member falls by its own weight, it is possible to perform continuous filtration and drainage of the turbid water without lowering the water permeability of the filtering member, and to remove the suspended suspended matter. Is to facilitate the separation.

[Brief description of the drawings]

FIG. 1 is an explanatory plan view of the present invention.

FIG. 2 is an explanatory side view of the present invention.

FIG. 3 is an explanatory front sectional view of the present invention.

FIG. 4 is an explanatory view showing a structure of a filter section of the present invention.

FIG. 5 is a partially enlarged cross-sectional explanatory view of a filter section of the present invention.

FIG. 6 is an explanatory diagram showing an operation state of the present invention.

FIG. 7 is an explanatory view showing a water permeation state of the filter section of the present invention.

FIG. 8 is an explanatory view showing a conventional turbid water treatment process.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Filtration tank main body 2 Screw conveyor part 7 Filter part 8 Drainage port 9 Partition plate 10 Drainage tank 11 Water storage tank 12 Frame part 13 Water passage hole 14 Synthetic resin fiber material 15 Filtration member

Claims (3)

[Claims] 1. A plurality of filter units having a hollow inside are provided in a filter tank body provided with a means for appropriately discharging the suspended matter settled at the bottom, and the filter units are constantly submerged in muddy water. A filtration tank wherein only purified water permeated into the hollow of each filter part is collected and drained in a state. 2. A filter according to claim 1, wherein a predetermined number of water passage holes are formed in the inner wall of the frame body having a hollow interior so as to communicate with the hollow interior. The filter tank according to claim 1, wherein a drain port is provided, and the frame body is structured to be interposed by a filter member. 3. The filter tank according to claim 2, wherein a synthetic resin fiber material for reinforcement is filled between the filter member and the filter member.