JP2542978B2 - Red tide recovery device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a red tide recovery device.

[0002]

2. Description of the Related Art As red tide recovery means, a method of pumping raw water containing red tide plankton (red tide raw water) with a pump and then subjecting it to treatments such as stirring, vacuum and pressure, and a flocculant such as PAC (polyaluminum chloride). A method is known in which red tide plankton is added to block the red tide plankton to facilitate recovery (see Japanese Utility Model Publication No. 62-13916).

[0003]

However, in the former case, since the red tide raw water containing a large amount of water is pumped up and treated by a pump or the like, there is a problem that the treatment efficiency is poor.

In the latter case, there is a problem that a large amount of coagulant cannot be used in lake water used as drinking water.

The object of the present invention is to solve the above problems,
It is to provide an efficient red tide recovery device that does not use a coagulant.

[0006]

A red tide recovery device according to the present invention comprises a red tide separation container floated on the water surface and capable of being lifted above the water surface, and a raw water injection device for injecting red tide raw water into the red tide separation container. Equipped with a raw water injection opening in the upper part of the red tide separation container, a filter for blocking the passage of red tide plankton in the middle part, a hopper part consisting of an inclined sliding plate in the bottom part, and a hopper part. The red tide recovery hose equipped with a valve is connected to the bottom of the.

[0007]

The red tide recovery work using the red tide recovery device according to the present invention is performed as follows, for example.

First, while the red tide separation container is floated on the water surface so that the filter portion is submerged, the raw water injection device injects the red tide raw water into the container one after another. When the red tide raw water is poured into the container one after another, the water in the red tide raw water is discharged to the outside of the container through the filter, the concentration of the red tide raw water in the container increases, and the red tide plankton enters the hopper at the bottom of the container. Settle and settle. At this time, since the water in the container flows through the submerged filter portion, the filter is less likely to be clogged. Moreover, since the filter is provided in the middle part of the container and the area thereof can be widened, the clogging progresses very slowly. Therefore,
A large amount of red tide raw water can be injected into the container for treatment. In addition, the red tide plankton does not deposit on the inclined slide plate of the hopper, but slides on it and deposits on the bottom of the hopper. In such a state, a pump is connected to the red tide recovery hose, the valve is opened, and the high-concentration red tide raw water accumulated in the hopper is sent to the red tide reservoir tank on board or on land to perform the necessary treatment. Since the red tide raw water thus recovered has a high concentration, it can be treated easily and efficiently simply by dehydrating it as it is in a dehydrator.

By using the red tide recovery device according to the present invention, the red tide can be recovered without using a coagulant as described above. In addition, since the red tide raw water is not pumped up but concentrated in the red tide separation container and then pumped up, the treatment efficiency is good.

[0010]

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

FIG. 1 shows the overall structure of the red tide recovery device. This red tide recovery device comprises a red tide separation container (1) and a raw water injection device (2), and an example of the container (1) is shown in FIG.

The container (1) is formed of a metal plate, a synthetic resin plate, or the like into an inverted cone shape, for example, an inverted quadrangular pyramid shape. container
A raw water injection opening (3) is formed at the upper end of (1).
A frame (4) is provided in (3). At the bottom of the container (1), there is provided a hopper part (6) having an inverted pyramidal shape composed of an inclined sliding plate (5), for example, an inverted quadrangular pyramid shape. A short discharge pipe (8) equipped with a valve (7) is provided at the bottom of the hopper (6), and a red tide recovery hose (10) equipped with a valve (9) is connected to the lower end of the short discharge pipe (8). The valve (9) at the tip of the recovery hose (10) is usually fixed to the frame (4) of the container (1). container
A large number of holes (11) are formed in the middle part of (1), that is, the part between the opening (3) and the hopper part (6), and the passage of the red tide plankton is allowed inside the part where the holes (11) are formed. A blocking fiber filter (12) is provided. Since the size of the red tide plankton is about 30 to 50 μm, the size of the eyes of the filter (12) is preferably about 20 to 30 μm.

A suitable floating body (13) is fixed to the outer side of the frame (4) at the upper end of the container (1), and the container (1) has its upper end exposed above the water surface (L) as shown in FIG. The (11) and the hopper (6) can be floated on the water surface (L) with the water submerged. Further, the frame (4) portion of the container (1) is hung by a ship or a hoisting device (14) on land, and can be hoisted above the water surface (L).

The raw water injection device (2) is provided with a floating body (15) floating on the water surface (L) separately from the container (1), and a raw water suction pump (16) installed thereon. A raw water suction pipe (17) is connected to the suction side of the raw water suction pump (16), and a suction head (18) is provided at the tip thereof. A raw water injection hose (19) is connected to the discharge side of the pump (16).

The red tide recovery work using the above-mentioned red tide recovery device is performed, for example, as follows.

First, in the morning to the evening, the container
With (1) floating on the water surface (L) so that the holes (11) of the filter (12) are submerged, the raw water with concentrated red tide is sequentially pumped by the pump (16) of the raw water injection device (2). It is sucked up and poured into the container (1) to make high-concentration red tide raw water in the container (1). When raw water is poured into the container (1) one after another, excess water in the raw water is discharged through the filter (12) to the outside of the container (1), the raw water is concentrated, and the red tide plankton contained in the container is collected. (1)
Settle and settle in the bottom hopper (6). At this time, since the water in the container (1) flows through the part of the filter (12) where the water is submerged, the filter (12) is less likely to be clogged, and the area of the part of the filter (12) is large. Therefore, the clogging progresses very slowly, and a large amount of raw water can be injected into the container (1) for treatment. Further, the red tide plankton does not deposit on the inclined slide plate (5) of the hopper part (6), but slides on it and is deposited on the bottom part of the hopper part (6). When injecting raw water, preferably the frame (4) of the opening (3)
For example, attach a saucer (20) made of wire mesh with a relatively large eye, and inject raw water through the saucer (20) to remove floating dust contained in the raw water,
Ensure that the raw water in the container (1) is not agitated by the injected raw water. The suction head of the raw water injection device (2)
A wire mesh or the like may be provided at an appropriate position from (18) to the tip of the injection hose (19) to remove floating dust.

After the above-mentioned daytime work is completed, at night, the container (1) is left floating on the water surface (L). During this time, most of the red tide plankton in the concentrated raw water settles and deposits in the hopper (6) of the container (1).

[0018] Preferably, during the above daytime raw water collection, concentration work and / or nighttime settling and sedimentation of red tide plankton, the container (1) is occasionally lifted and vibrated up and down, By shaking with a shaker attached to the container (1), the clogging of the filter (12) is released and the red tide plankton is prevented from accumulating on the sliding plate (5). Settling, try to accelerate the settling. The inclination angle of the sliding plate (5) of the hopper section (6) may be appropriately determined. For example, if the inclination angle from the horizontal plane is set to about 60 degrees, red tide plankton will be deposited on the sliding plate (5). Instead, it will settle on the bottom of the hopper (6).

After the container (1) was left overnight as described above to deposit the red tide plankton in the hopper (6), the recovery hose (10) was connected to a recovery pump (not shown) the next day. ,
Open the valves (7) and (9) and put the high-concentration red tide raw water at the bottom of the hopper (6) into the onboard or onshore red tide reservoir. At this time,
Since the raw water in the hopper section (6) is concentrated, high-concentration raw water is sent to the red tide sump tank.For example, this high-concentration raw water can be easily and efficiently treated by simply dehydrating it with a dehydrator. it can.

When the red tide recovery is completed in this way, the valves (7) and (9) are closed and the container (1) is floated again on the water surface (L) to collect the raw water and concentrate it as described below. Repeat.

Before connecting the recovery pump to the recovery hose (10) and collecting the red tide raw water, the container (1) is lifted so that the upper part of the hopper (6) is above the water surface (L). May be. In this way, the water in the upper part of the hopper (6) in the container (1) will pass through the filter (12) and
(1) High concentration raw water remains in the hopper (6) after being discharged to the outside. Then, if the red tide raw water is collected with the container (1) being lifted in this way, the hole (1) of the filter (12) of the container (1)
Since part 1) is located above the water surface (L), no water enters the container (1) through this part, and only high-concentration raw water is sent to the red tide reservoir.

[0022]

According to the red tide recovery device of the present invention, as described above, the red tide raw water can be concentrated and recovered without using a coagulant, and the treatment efficiency can be improved.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view of a red tide recovery device showing an embodiment of the present invention.

FIG. 2 is a perspective view of a red tide separation water tank of the red tide recovery device of FIG.

[Explanation of symbols]

 (1) Red tide separation container (2) Raw water injection device (3) Raw water injection opening (5) Sliding plate (6) Hopper part (9) Valve (10) Red tide recovery hose (12) Filter

Front page continuation (72) Inventor Kazutaka Hosogaya, 5-3-28 Nishikujo, Konohana-ku, Osaka City Nitate Shipbuilding Co., Ltd. (72) Inventor Chiaki Tojo, 5-28-3, Nishikujo, Konohana-ku, Osaka Shipbuilding Co., Ltd. (72) Inventor Masayuki Isaka 5-3-8 Nishi-Kujo, Konohana-ku, Osaka City Nitate Shipbuilding Co., Ltd. (72) Inventor Nobuyuki Shima 3-28, Nishikujo, Konohana-ku, Osaka Shipbuilding Co., Ltd. (72) Inventor Yasuo Nakai 5-3-2, Nishikujo 5-chome, Konohana-ku, Osaka City Nitate Shipbuilding Co., Ltd.

Claims (1)

(57) [Claims] 1. A red tide separation container floated on the surface of the water and capable of being lifted above the water surface, and a raw water injection device for injecting the red tide raw water into the red tide separation container, and the raw water is provided above the red tide separation container. An injection opening is provided, and a filter that blocks the passage of red tide plankton is provided in the middle,
A red tide recovery device in which a hopper part composed of an inclined sliding plate is provided in the bottom part, and a red tide recovery hose equipped with a valve is connected to the bottom of the hopper part.