JP3018265B2 - Sea area purification system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sea area purification system for purifying seawater in a part of sea area such as a harbor.

[0002]

2. Description of the Related Art Conventionally, one of the methods for purifying seawater in a semi-enclosed sea area partitioned by a partition wall provided in a part of a sea area such as a harbor is to purify water such as gravel inside as a partition wall. May be filled with a contact material. This method uses the difference in tide level between the inside and outside of the partition caused by the ebb and flow of the sea area, and when seawater from the surrounding sea area is taken into the semi-closed sea area through the inside of the partition wall, the contact material inside the partition wall Purifies seawater.

[0003]

However, in this method, if seawater is passed through the inside of the partition for a long time,
The inside of the partition embankment is often clogged due to the attachment and growth of the biofilm on the surface of the contact material, the capture of suspended solids in the gaps between the contact materials, and the like. Due to such clogging, the permeability of the partition dike gradually deteriorates, the amount of water taken into the semi-enclosed sea area decreases, and if clogging further progresses, the inside and outside of the partition dike caused by ebb and flow There is also a problem that it is impossible to take in seawater only by the tide level difference.

Conventionally, as a means for eliminating such clogging inside the partition, a blower is installed at the bottom of the partition and the inside of the partition is aerated by the blower, or a pump is installed and the pump is used. A method has been adopted in which the inside of the partition levee is washed by sending water or the like.

However, such a method requires a large-scale construction work for installing the blower and the pump in the sea area, and requires a high power cost (electricity bill) for operating the blower and the pump. There is a problem that the management of the pump and the pump and the regular maintenance are required, and the work for that is difficult.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a sea area purification system capable of cleaning a contact material inside a partition embankment by a simple and inexpensive method.

[0007]

According to the present invention, a part of the sea area is partitioned from the surrounding sea area by a partition wall provided with an opening and filled with a contact material for water purification into a semi-enclosed sea area. An air chamber for storing air is provided at the bottom of the partition, and the inside of the partition and the air chamber are connected by an air supply pipe that can be controlled to open and close, and a water storage chamber is provided at the top of the partition. A chamber is provided, and each water storage chamber is connected to the air chamber by a pipe that can be controlled to open and close, and one of the water storage chambers is connected to the inside of the partition wall by a water supply pipe branched from the pipe. A rotary device that is driven to rotate by a water flow, and a pumping device that is connected to the rotary device and pumps water to the water storage chamber.
This is a means for solving the problem.

[0008]

According to the sea area purification system of the present invention, when seawater is taken into the semi-enclosed sea area from the surrounding sea area through the partition wall by using the tide level inside and outside the partition wall due to ebb and flow, the inside of the partition wall is separated. Sea water is purified by the contact material. When seawater passes through the opening of the partition wall, when the rotating device is driven to rotate by the water flow, the pumping device is operated by the energy, and the seawater is pumped and stored in the two water storage chambers. If the inside of the partition becomes clogged, or if the water in one of the water storage chambers is allowed to flow down into the air chamber at regular intervals, the air in the air chamber will be
The contact material is discharged from the air supply pipe into the partition wall, and aerated and cleaned. When the air chamber is filled with water, the aeration cleaning is completed, and then the water in the other water storage chamber is supplied to the inside of the partition via the pipes and the water supply pipe, and the contact material is formed by the water flow. Washed. Since the contact material inside the partition levee is washed in this way, clogging of the contact material is eliminated or prevented.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a marine purification system according to the present invention will be described below with reference to FIGS.

In the figure, reference numeral 1 denotes a partition embankment.
Thus, a part of the sea area such as a harbor is separated from the surrounding sea area 2, and a semi-enclosed sea area 3 is set. Partition 1
Is made of a water-permeable material on both the front and back sides, and the inside thereof is filled with a contact material 4 such as gravel. The smaller the particle size of the contact material 4 such as gravel, the higher the purification performance can be expected. However, since the contact material 4 is liable to be clogged, an appropriate particle size is selected and used. I do. An opening 5 communicating from the semi-enclosed sea area 3 to the surrounding sea area 2 is provided in a part of the partition wall 1.

An air chamber 6 for storing air is provided at the bottom of the partition wall 1. The air chamber 6 and the inside of the partition 1 are
They are connected by an air supply pipe 7 whose opening and closing can be controlled.
The air supply pipe 7 has a valve 8 that can be controlled to open and close at one end, and is disposed inside the air chamber 6 with the other end closed.
The air supply pipe 7 is provided with a plurality of branch pipes 9, 9,..., Which communicate with the inside of the partition 1 from the bottom of the partition 1 to the inside of the air chamber 6. Are formed in the partition wall 1 to discharge air from the inside. A check valve (not shown) at the air discharge port 10
Is provided to prevent water from flowing out of the partition wall 1 to the air supply pipe 7.

Above the partition 1, two water storage chambers 11 and 12 for storing water are provided, which are vertically arranged.
Hereinafter, the water storage chamber provided on the upper side is referred to as the first water storage chamber 1.
1. The water storage room provided on the lower side is referred to as a second water storage room 12. The first water storage chamber 11 and the air chamber 6 are connected to each other, and the second water storage chamber 12 and the air chamber 6 are connected to each other via a first pipe 13 and a second pipe 14, respectively. At the connection between the first water storage chamber 11 and the first pipe 13 and at the connection between the second water storage chamber 12 and the second pipe 14, control valves 15 and 16, which can be controlled to open and close, respectively, are provided. Installed. The second pipe 14 is provided to extend into the air chamber 6, and its tip is closed in the air chamber 6, and a plurality of water supply pipes 1 branched from the pipe 14 are provided in the middle of the second pipe 14.
7, 17,... Are provided. The water supply pipe 17 communicates with the inside of the partition wall 1 from the bottom of the partition wall 1, and a water outlet 18 for discharging water from the second water storage chamber 12 into the partition wall 1. 18 are formed. A check valve (not shown) is provided at the water jet port 18 to prevent water from flowing out of the partition wall to the water supply pipe.

On the upper part of the opening 5 provided in a part of the partition wall 1, the water of the semi-enclosed sea area 3 is passed through the opening 5 like an propeller, a water wheel, etc. A rotation device 19 that is driven to rotate by a water flow when flowing out to the second device 2 is provided.

In the vicinity of the rotating device 19, a water pumping device 20 such as a screw pump which is mechanically connected to the rotating device 19 and operates with the rotation of the rotating device 19 is operated.
Is installed. The water pumping device 20 is for pumping seawater into the two water storage chambers 11 and 12 and discharging water filled in the air chamber 6 to the outside.

Next, the operation and effect of the marine purification system of this embodiment will be described. When seawater is taken into the semi-enclosed sea area 3 from the surrounding sea area 2 through the partition wall 1 by utilizing the tide level difference between the inside and outside of the partition wall 1 due to ebb and flow, the seawater is purified by the contact material 4 inside the partition wall 1. .

When seawater flows from the semi-closed sea area 3 to the outer sea area 2 through the opening 5 of the partition wall 1, when the rotating device 19 such as a propeller or a water wheel is driven to rotate by the water flow, the energy is used to pump water. The apparatus 20 operates to pump seawater into the two water storage chambers 11 and 12 for storage. This operation is repeated each time the water in the semi-enclosed sea area 3 is discharged to the outer sea area 2 until the two water storage chambers 11 and 12 are full.

As described above, when the seawater is introduced into the semi-enclosed sea area 3 approximately twice a day at every ebb and flow, the contact material 4 inside the partition wall 1 is eventually observed. Clogging occurs, and when the tide level changes due to ebb and flow, it becomes impossible to take purified water into the semi-enclosed sea area. Contact material 4
The period until clogging varies depending on the particle size and porosity of the contact material 4, or the degree of turbidity of seawater and the amount of water passing, but is generally about 2 to 12 months.

When the contact material 4 is clogged, the contact material 4 is cleaned according to the following operation procedure.

The control valve 15 of the first water storage chamber 11 is opened, and the water in the water storage chamber 11 flows down from the first pipe 13 into the air chamber 6 by gravity. At this time, by opening the valve 8 of the air supply pipe 7, the air in the air chamber 6 passes through the air supply pipe 7 and the branch pipes 9, 9,. 1, the contact material 4 is aerated and cleaned. In the aeration cleaning, the cleaning effect by the water flow generated by the air bubbles rising in the seawater around the contact material is larger than the cleaning effect by the air bubbles discharged at this time.

When the inside of the air chamber 6 is filled with the water from the first water storage chamber 11, the aeration cleaning ends at that point. Next, when the control valve 16 of the second water storage chamber 12 is opened, the water in the water storage chamber 12 is discharged from the second pipe 14 through each of the water supply pipes 17, 17,. , 18 ...
Is supplied to the inside of the partition 1 and the contact material 4
Wash. Thereby, clogging of the contact material 4 can be eliminated.

When the cleaning of the contact material 4 is completed by the two steps of the aeration cleaning and the water cleaning in this way, the air chamber 6 is filled with water, so that the period other than the cleaning period is utilized. An operation of discharging the water to the outside and emptying the air chamber 6 is performed. Specifically, the rotating device 19 and the pumping device 2 are driven by the seawater flowing through the opening 5 of the partition 1.
0, and the pumping device 20 causes the air chamber 6 to operate.
Drain water inside.

When the cleaning of the contact material 4 is completed,
The water that has contributed to this cleaning is contaminated by contaminants and the like trapped between the contact members 4, and is discharged to the outside from the upper part of the partition wall 1 and disposed of. Here, since the pollutants and the like trapped between the contact materials 4 are being mineralized by the biological purification action, they do not pollute the sea area 2 even if they are discharged to the external sea area 2.

As described above, according to the sea area purification system of the present embodiment, the contact material 4 inside the partition embankment 1 can be washed and clogging can be eliminated. Seawater can be taken in smoothly with an almost constant amount of taken-in water.

Furthermore, since the contact material 4 inside the partition wall 1 is washed by using the energy of the water flow and does not require any artificial energy, it is economical with little power cost. In addition, since large-scale equipment is not required, construction work is simple, and management and maintenance of the equipment are almost unnecessary, or even if there is, much labor is not required.

It should be noted that the present invention is not limited to the above-described embodiment, and various changes can be made without departing from the scope of the present invention.

For example, in the above-described embodiment, an example has been described in which the contact material 4 inside the partition wall 1 is washed when the contact material 4 is clogged. Before clogging, the contact material 4 may be washed periodically, for example, every two to three months, thereby preventing clogging.

In the above example, the various control valves 15,
As the material 16, a material that can be controlled to open and close according to a conventional method may be used. It is economical to use a method of controlling the flow by the lift of the rubber bag.

In addition, a check valve is provided at a part of a flow path when seawater is taken into and discharged from the partition wall 1 so as to prevent a backflow of seawater when the seawater flows toward the outside and at high tide. Is also good.

Further, in the above embodiment, the contaminated water which has contributed to the cleaning of the contact material 4 inside the partition 1 is discharged to the outside as it is. It is a matter of course that a sedimentation part for sedimenting and removing contaminants and the like may be provided.

In this sea area purification system, the amount of seawater taken in and discharged from the outside relative to the set size of the semi-enclosed sea area 3, that is, the amount of water retained, is determined by the quality of the external seawater, It is desirable to adopt a configuration that can be controlled in accordance with various conditions such as tide level fluctuation, purification capacity of the contact material 4, use of the semi-enclosed sea area 3, and target water quality.

[0031]

As described above, according to the sea area purification system of the present invention, the contact material inside the partition levee is washed,
Since clogging can be eliminated or prevented, seawater can be smoothly taken into the semi-enclosed sea area with a substantially constant amount of taken water. In addition, no artificial energy is required to clean the contact material, so it is economical without power costs, and it does not require large-scale equipment. Is also easy.

[Brief description of the drawings]

FIG. 1 is a plan view showing an example of a semi-closed sea area employing a sea area purification system according to the present invention.

FIG. 2 is a side sectional view showing one embodiment of a sea area purification system according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Partition embankment 2 Surrounding sea area 3 Semi-closed sea area 4 Contact material 5 Opening 6 Air chamber 7 Air supply pipe 11 1st water storage room (water storage room) 12 2nd water storage room (water storage room) 13 First piping (piping) 14 Second piping (piping) 17 Water supply pipe 19 Rotating device 20 Pumping device

Claims (1)

(57) [Claims] Claims: 1. A part of a sea area is partitioned from a surrounding sea area into a semi-closed sea area by a partition wall having an opening and filled with a contact material for water purification, and a bottom portion of the partition wall is provided. In addition to providing an air chamber for storing air, the inside of the partition and the air chamber are connected by an air supply pipe that can be controlled to open and close, and a water storage chamber is provided above the partition.
A water storage chamber is connected to the air chamber by a pipe that can be controlled to open and close, and one of the water storage chambers is connected to the interior of the partition wall by a water supply pipe branched from the pipe. Has a rotating device that is driven to rotate by water flow,
A water purification system, further comprising a pumping device connected to the rotating device for pumping water to the water storage chamber.