JPH05287718A - Clarifying system of sea area - Google Patents

Abstract

PURPOSE:To wash a contact material in a partitioning bank through a simple and inexpensive method. CONSTITUTION:A part of a sea area is partitioned from a peripheral sea area 2 by a partitioning bank 1, which has an opening section 5 and the inside of which is filled with a contact material 4 for clarifying water, thus obtaining a semi-closing sea area 3. An air chamber 6 is installed onto the bottom of the partitioning bank 1 while the inside of the partitioning bank 1 and the air chamber 6 are connected by an opening-closing-controllable air supply pipe 7. Water storage chambers 11, 12 are mounted to the upper section of the partitioning bank 1, and each water storage chamber 11, 12 is connected to the air chamber 6 by opening-closing-controllable pipings 13, 14 respectively. One water storage chamber 12 is combined with the inside of the partitioning bank 1 by a water supply pipe 17 branched from the piping 14. A turning apparatus 19 rotated and driven by a water flow and a pumping apparatus 20 being coupled with the turning apparatus 19 and pumping up water to the water storage chambers 11, 12 are installed to the opening section 5.

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 sea water in a part of the sea area such as a port.

[0002]

2. Description of the Related Art Conventionally, as one of the methods for purifying seawater in a semi-closed sea area partitioned by a partition wall provided in a part of a sea area such as a harbor, as a partition bank, water purification such as gravel The one filled with the contact material for use may be used. This method utilizes the tidal level difference between the inside and outside of the dike caused by the ebb and flow of the sea, and when the seawater from the surrounding sea is taken into the semi-closed sea through the dike, the contact material inside the dike is used. It purifies seawater.

[0003]

However, in this method, if seawater is passed through the partition wall for a long period of time,
The inside of the partition wall is often clogged due to the adhesion and growth of biofilm on the surface of the contact material and the capture of suspended solids in the gaps between the contact materials. Due to such clogging, the permeability of the partition diminishes gradually, the amount of water taken into the semi-closed sea area decreases, and if clogging progresses further, the interior and exterior of the partition dike caused by ebb and flow. There is also a problem that the seawater cannot be taken in only by the difference in tide level.

As means for eliminating such clogging inside the partition, conventionally, a blower is installed at the bottom of the partition to aerate the interior of the partition with the blower, or a pump is installed and the pump is used. The method of cleaning the inside of the partition by sending water was adopted.

However, in such a method, since the blower and the pump are installed in the sea area, a large-scale construction work is required, and the power cost (electricity cost) for operating them is high, and the blower is also required. There was a problem that management of pumps and pumps and regular maintenance were necessary, and the work for that was difficult.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a purification system for a sea area which can clean the contact material inside the partition by a simple and inexpensive method.

[0007]

According to the present invention, a part of the sea area is divided from the 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. An air chamber for air storage is provided at the bottom of the partition, the inside of the partition is connected to the air chamber 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 whose opening and closing can be controlled, and one water storage chamber is connected to the inside of the partition by a water supply pipe branched from the pipe, and the opening is formed. In that, a rotating device that is driven to rotate by a water flow, and a pumping device that is connected to the rotating device and that pumps water to the water storage chamber are installed.
This is a means for solving the above-mentioned problems.

[0008]

According to the system for purifying seawater according to the present invention, when seawater is taken into the semi-closed seawater from the surrounding seawater through the seawall by utilizing the tide difference between the inside and outside of the seawall due to the ebb and flow, The seawater is purified by the contact material. When seawater passes through the opening of the dike, when the rotating device is driven to rotate by the water flow, the energy causes the pumping device to operate and the seawater is pumped and stored in the two water storage chambers. When the inside of the partition wall is clogged, or when the water in one of the water storage chambers is caused to flow down into the air chamber at regular intervals, the air in the air chamber is
It is discharged from the air supply pipe to the inside of the partition, and the contact material is aerated and cleaned. When the air chamber is filled with water, the aeration and cleaning is completed, and then the water in the other water storage chamber is supplied to the inside of the partition through the pipe and the water supply pipe, and the contact material is generated by the water flow. To be washed. Since the contact material inside the partition wall is cleaned in this way, clogging of the contact material is eliminated or prevented.

[0009]

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

In the figure, reference numeral 1 is a partition bank, and this partition bank 1
Due to this, a part of the sea area such as a harbor is separated from the surrounding sea area 2 to set a semi-closed sea area 3. Partition 1
Both of the front surface and the back surface are made of a water-permeable material, and the inside thereof is filled with a contact material 4 such as gravel. For the contact material 4 such as gravel, the smaller the particle size is, the higher the purification performance can be expected, but on the other hand, the contact material 4 is more likely to be clogged. To do. An opening 5 that communicates from the semi-closed sea area 3 to the surrounding sea area 2 is provided in a part of the partition bank 1.

An air chamber 6 for air storage 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 whose opening and closing can be controlled at one end, and is arranged inside the air chamber 6 with the other end closed.
A plurality of branch pipes 9, 9 ... Are provided in the air supply pipe 7, and the branch pipes 9, 9 ... Communicate with the inside of the partition wall 1 from the bottom of the partition wall 1, and the inside of the air chamber 6 is connected. Are formed to discharge the above air into the partition wall 1. A check valve (not shown) is provided at the air outlet 10.
Is provided to prevent water from flowing out of the partition 1 into the air supply pipe 7.

Two water storage chambers 11 and 12 for storing water are provided on the upper part of the partition 1 in a vertically arranged manner.
Hereinafter, the water storage chamber provided on the upper side is referred to as the first water storage chamber 1
1. The water storage chamber provided on the lower side is referred to as a second water storage chamber 12. The first water storage chamber 11 and the air chamber 6, 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 capable of open / close control are provided. It is installed. The second pipe 14 is provided so as 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 thereof.
7, 17, ... Are provided. The water supply pipe 17 communicates with the inside of the partition 1 from the bottom of the partition 1, and a water jet 18 for ejecting water from the second water storage chamber 12 into the partition 1. 18 are formed. A check valve (not shown) is provided at the water ejection port 18 to prevent water from flowing out from the inside of the partition wall to the water supply pipe.

Further, in the upper part of the opening 5 provided in a part of the partition 1, the water in the semi-closed sea area 3 passes through the opening 5 like the propeller and the water wheel. There is provided a rotating device 19 that is driven to rotate by the water flow when flowing out to 2.

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

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

When seawater passes through the opening 5 of the partition 1 and flows out from the semi-closed sea area 3 to the outer sea area 2, the water flow causes a rotary device 19 such as a propeller or a water wheel to rotate, and the energy is pumped. The device 20 operates and pumps and stores seawater into the two water storage chambers 11 and 12. This operation is repeated every time the water in the semi-closed sea area 3 is discharged to the outer sea area 2 until the two water storage chambers 11 and 12 are filled with water.

As described above, when the seawater is taken into the semi-closed sea area 3 about twice a day at every tidal time, the contact material 4 inside the partition bank 1 will soon become visible. Clogging occurs and it becomes impossible to take in purified water into the semi-closed sea area due to the tidal range caused by the ebb and flow. Contact material 4
The period until the occurrence of clogging depends on the particle size and porosity of the contact material 4, the pollution degree of seawater, the amount of water flow, etc., but is generally about 2 to 12 months.

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

The control valve 15 of the first water storage chamber 11 is opened to allow the water in the water storage chamber 11 to flow 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 respective branch pipes 9, 9, ... From the air discharge ports 10, 10 ,. 1 is discharged into the interior of the contact material 1 and the contact material 4 is aerated and cleaned. The aeration cleaning has a greater cleaning effect by the water flow generated by the air bubbles rising in the seawater around the contact material than the cleaning effect by the air bubbles discharged at this time.

When the air chamber 6 is filled with the water from the first water storage chamber 11, the aeration and cleaning is completed 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 passes from the second pipe 14 through the water supply pipes 17, 17 ... , 18 ...
Is supplied to the inside of the partition bank 1, and the contact material 4 is generated by the water flow.
To wash. Thereby, the clogging of the contact material 4 can be eliminated.

At the time 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 a period other than the cleaning period is used. The water is discharged to the outside and the air chamber 6 is emptied. Specifically, the rotating device 19 and the pumping device 2 are driven by the flow of seawater passing through the opening 5 of the partition 1.
0, and the air pump 6 is operated by the water pumping device 20.
Discharge the water inside.

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

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

In addition, when the contact material 4 inside the partition 1 is washed, the energy of the water stream is used and no artificial energy is required. Therefore, the power cost is little and it is economical. Further, since a large-scale device is not required, the construction work is simple, and management and maintenance of the device are almost unnecessary, or even if there is, it does not take much trouble.

The present invention is not limited to the above-mentioned embodiments, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

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

In the above example, the control valves 15 of the above various types are
A material whose opening and closing can be controlled according to a conventional method may be used as the material 16. However, for a large water-system flow passage cross-section, for example, a rubber bag into which air can be taken in and out is provided, and the air is taken in and out. It is economical to use the method of controlling the flow by the lifting force of the rubber bag.

Further, a check valve is installed in a part of the flow path when the seawater is taken in and discharged inside the partition 1 so as to prevent the backflow of the seawater toward the outside and at high tide. Good.

Further, in the above-mentioned embodiment, the dirty water that contributed to the cleaning of the contact material 4 inside the partition 1 is discharged to the outside as it is, but in the vicinity of the partition 1, this dirt in water, especially It is of course possible to provide a settling section for settling and removing contaminants and the like.

In this purification system for the sea area, the intake amount and the discharge amount of the sea water from the outside are compared with the water quality of the outside sea water with respect to the set size of the semi-closed sea area 3, that is, the amount of water held. It is desirable to have a configuration that can be controlled according to various conditions such as tide level fluctuation, purification capacity of the contact material 4, application of the semi-closed 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 wall is cleaned,
Since the clogging can be eliminated or prevented, the intake of seawater into the semi-closed sea area can be performed smoothly with an almost constant intake amount. Moreover, since cleaning the contact material does not require any artificial energy, it does not require power cost and is economical, and it does not require large-scale equipment. Is also easy.

[Brief description of drawings]

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

FIG. 2 is a side sectional view showing an embodiment of a purification system for marine areas according to the present invention.

[Explanation of symbols]

 1 Partition 2 Sea around 3 3 Semi-closed sea 4 Contact material 5 Opening 6 Air chamber 7 Air supply pipe 11 First water storage chamber (water storage chamber) 12 Second water storage chamber (water storage chamber) 13 First pipe (pipe) 14 Second pipe (pipe) 17 Water supply pipe 19 Rotating device 20 Pumping device

Claims (1)

[Claims] 1. A part of the sea area is divided into a semi-closed sea area from a surrounding sea area by a partition dam having an opening and filled with a contact material for water purification, and a bottom part of the partition dam is provided. An air chamber for air storage is provided, and the inside of the partition wall and the air chamber are connected by an air supply pipe whose opening and closing can be controlled, and two water storage chambers are provided above the partition wall.
A chamber is provided, and each water storage chamber is connected to the air chamber by a pipe whose opening and closing can be controlled, and one water storage chamber is connected to the inside of the partition by a water supply pipe branched from the pipe, and the opening is formed. Includes a rotating device that is driven to rotate by water flow,
A purifying system for a sea area, which is connected to the rotating device and has a pumping device for pumping water to the water storage chamber.