JP2544696B2 - Seawater purification equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seawater purification device for purifying seawater over a wide area.

[0002]

2. Description of the Related Art In recent years, natural coastlines have been lost due to landfills, coastal improvements, etc., and pollution of seawater is progressing due to factory drainage, domestic drainage, etc., so that people can interact with the sea. Is decreasing. So recently
A part of the coast including the existing coastline is surrounded by a revetment, and this revetment is provided with a seawater purification function, and the inside is provided as a recreational water area.

Conventionally, in order to give the above-mentioned revetment a purifying function, the revetment is formed of a water-permeable (permeable) structure,
Some attempts have been made to retain gravel in this structure and cause the seawater to flow through the gravel due to the ebb and flow of the tide, and to purify the seawater by utilizing the so-called inter-gravel contact oxidation.

[0004]

However, according to the measures using the above-mentioned catalytic oxidation between gravel, the purification performance is still insufficient, so that it is possible to secure clean seawater in the recreational water area when the pollution load is large. Becomes insufficient, and on top of that,
There is a problem that clogging is likely to occur and it is difficult to maintain the purification performance for a long period of time.

The present invention has been made in view of the above conventional problems, and an object of the present invention is to provide a seawater purification apparatus which is excellent in purification performance and can easily cope with long-term performance maintenance.

[0006]

In order to achieve the above object, the present invention provides a filter in which a purified water area is surrounded by a fixed structure having a water passage, and a filter medium is housed in the water passage of the fixed structure. It is arranged so that it can be detached and attached, and the water area offshore of the fixed structure
The sand beach was constructed to cover the water passage of the fixed structure.
Characterized in that was.

[0007]

[Action] In seawater purifying apparatus constructed as described above, when the circulating seawater through the water passage of the fixed structure by tides, filter media pollutants contained in sea water in the filter also
Is forcibly captured by sand on the beach . Moreover, the purifying performance can be maintained permanently by replacing or cleaning the filter according to the clogging of the filter medium.

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

1 to 3 show a first embodiment of the present invention. In these figures, 1 is a seawater purification apparatus according to the present invention, which encloses a part of the coast including the existing coastline L in an arc shape and forms a closed water area (inner water surface) a inside thereof. There is. The seawater purification apparatus 1 includes a plurality of permeable blocks 3 as fixed structures continuously installed on a rubble mound 2 provided on the seabed, and an offshore water area (outer water surface) b side of the block 3 to the blocks. It is roughly composed of a sandy beach 4 constructed along it.

The transparent block 3 has a box-shaped block body 5. The inside of the block main body 5 is divided into two chambers, an upper chamber and a lower chamber, by a bottom wall 6 and six chambers in a plane direction by a plurality of standing walls 7 arranged in a grid pattern (FIG. 2). Of the six chambers partitioned in the plane direction, three chambers located on the outer water surface b side are small chambers 8 having a smaller cross section than the three chambers located on the inner water surface a side. Ten is to be paid. A plurality of slits 9 are formed in the standing wall 7 for partitioning the inner and outer chambers and the side walls 5a and 5b of the block body 5 facing the inner and outer water surfaces a and b extending in the vertical direction. The slit 9 and the upper chamber of the block body 5 form a water passage, and seawater flows between the inner and outer water surfaces a and b through the water passage.

The lower chamber of the block body 5 partitioned by the bottom wall 6 is filled with a filling material (sand in this case) 11, and the block body 5 has its own weight and the weight of the filling material 11. Has been established on the rubble mound 2 by. The filter 10 housed in the small chamber 8 of the block body 5 is composed of a bag body 12 made of woven or non-woven fabric and a filter material (sand in this case) 13 enclosed in the bag body 12. There is. A handle 14 is provided on the upper surface of the bag body 12. One of the transmissive blocks 3 is that while the filling material 11 is supplied to the block body 5, it is sunk on the rubble mound 2, then the filter 10 is housed in the small chamber 8 inside, and the block body 5 is covered. It is completed by covering 15 and 16. Then, the transparent block 3 has its entire height set so as not to be submerged in water even when the maximum tide level (HWL) is reached, and covers the maximum tide level (HWL) and the minimum tide level (LWL). The height of the upper part including the slit 9 is set so that the filter 10 can be positioned in the range.

On the other hand, the sand beach 4 has a maximum thickness that can cover the slit 9 of the block body 5 on the side in contact with the transparent block 3, and the thickness gradually decreases from there to the offshore. Therefore, its upper surface slopes offshore like a natural sandy beach.

In the above embodiment, when the tide is high, the seawater in the outer water area b permeates into the sand beach 4 and further enters into the permeation block 3 through the slit 9 formed in the one side wall 5b of the block body 5 and is filtered. After passing through the vessel 10, it flows into the inner water surface a from the slit 9 formed in the other side wall 5a of the block body 5. At this time, most of the pollutants in the seawater are captured near the shoreline of the beach 4, so that the amount of pollutants trapped by the sand in the beach 4 and the filter medium 13 in the filter 10 becomes small. It does not cause clogging. In addition, phytoplankto floating in seawater
Most of them are microscopic living on the sand surface while permeating into the beach 4.
It is decomposed by the material and its inflow to the water surface a is suppressed.
It The pollutants trapped near the shoreline of the beach 4 are
Then washed by the waves.

On the other hand, at low tide, seawater on the inner water surface a enters the permeation type block 3 through the slits 9 in the side wall 5a of the block body 5, passes through the filter 10 and passes through the block body 5.
From one side wall 5b to the sand beach 4 side, and further to the sand beach 4
It infiltrates inside and flows out to the outside water area b. Then, when seawater passes through the filter 10, most of the pollutants contained therein are captured by the filter medium 13 in the filter 10. By repeating this ebb and flow, the amount of pollutants trapped in the filter medium 13 gradually increases, and finally the filter medium 13 becomes clogged. Therefore, at this stage, the lid 16 corresponding to the small chamber 8 of the block body 5 is opened, and the handle 14 is suspended by suspending the handle 14 on a suspending tool (not shown) extended from a crane ship or the like. Either replace with a new filter or wash it in the outside water area b so that it can be stored in the small chamber 8.

FIG. 4 shows a second embodiment of the present invention. A feature of the second embodiment is that a plate-shaped filter 20 having a fiber mat formed by collecting synthetic fibers, metal fibers and the like as a filter medium is used, while the small chamber 8 is eliminated from the block body 5. , The inner and outer walls 5a and 5b on the upper part
A simple water passage 21 communicating with the slit 9 is provided, and the filter 20 is detachably arranged in the water passage 21 by using a guide 22. In the second embodiment, since the filter medium has a higher ability to collect the filter than sand, the filter 20 can be made sufficiently smaller than the filter 10 in the first embodiment, and the filter medium itself can be made smaller. Combined with the light weight, the whole is extremely light. Therefore, the handling becomes easy. For example, as shown in FIG. 4, the working chamber 23 is provided in the upper portion of the block body 5 corresponding to the installation site of the filter 20, and the worker is put in the working chamber 23. Thus, the filter 20 can be easily replaced by hand.

In the above two embodiments, the sand beach 4 is formed on the outer side of the transparent block 3, but this sand beach may be omitted. In addition, in the above two examples, the closed water area (purified water area) is cooperated with the coast.
However, this purified water area may be formed independently in the inland sea, which is away from the coast.

[0017]

As described above in detail, according to the seawater purifying apparatus of the present invention, the pollutants in seawater are removed from the sand.
Since it was forcibly captured using the beach and filter media ,
The purification performance will be excellent, and the purification performance can be supported permanently by replacing or cleaning the filter according to the clogging of the filter material, making it suitable for the creation of hydrophilic beaches.
Become .

[Brief description of drawings]

FIG. 1 is a sectional view taken along the line AA of FIG. 3, showing an embodiment of a seawater purification device according to the present invention.

FIG. 2 is a perspective view showing a permeable block that constitutes the present seawater purification device.

FIG. 3 is a schematic diagram showing a usage mode of the seawater purification device.

FIG. 4 is a cross-sectional view showing another embodiment of the seawater purification device.

[Explanation of symbols]

 3 Transparent block 4 Sand beach 5 Block body 9 Slit 10 Filter 13 Filter medium (sand) 20 Filter

Claims (1)

(57) [Claims] 1. The purified water area is surrounded by a fixed structure having a water passage, and a filter containing a filter medium is detachably arranged in the water passage of the fixed structure, and the offshore water area of the fixed structure is further arranged.
The sand beach was constructed to cover the water passage of the fixed structure.
A seawater purification device characterized by that.