JP2019132108A - Apparatus and method for recovering water organisms - Google Patents

Abstract

To provide an apparatus for treating water organisms which suppresses an abrupt load applied to a dust collector and can continue stable operation when a large amount of dust temporarily flows in an intake channel.SOLUTION: An apparatus 10 for treating water organisms includes: a screen part 22 which inclines at a predetermined angle relative to a water flow direction and collects dust; collection means 20 having a float 30 which is attached to the screen part 22 and gives a floating force; collection means 40 having a suction part 42 which is connected to the screen part 22 through a hose from the ground and sucks the dust from the upper part of a collection surface and a collection part 50 which conducts water separation of the dust sucked in the suction part 42 and collects the dust; and a cable body 60 which is connected to the collection means 20 from the ground and floats the collection means 20 with a predetermined depth of a water channel 12.SELECTED DRAWING: Figure 1

Description

  TECHNICAL FIELD The present invention relates to an aquatic organism recovery apparatus and an aquatic organism recovery method that are installed on the upstream side of a water channel of a dust removal device that removes dust from seawater or river water and prevent the dust collection capability of the dust removal device from decreasing.

  In plant equipment such as power plants, water intake equipment for guiding seawater and river water to secure cooling water may be provided. This water intake equipment is also provided with a dust removing device for collecting and removing foreign matters such as dust mixed in the fluid.

  FIG. 4 is a perspective view of the dust removing device. As shown in the figure, the dust removing device 1 includes a pair of left and right (also referred to as width direction) link chains 2 provided so as to cross the water channel, and upper and lower sprocket wheels 3 that rotate the link chain 2 (the upper sprocket wheel is not shown). And a screen 4 inclined at a predetermined angle or perpendicular to the water flow direction for each link of the link chain 2. The dust removing apparatus 1 having such a configuration can remove dust without clogging the screen 4 by rotating the screen 4 and continuously picking up dust.

  In recent years, the amount of jellyfish generated has been increasing due to the rise in seawater temperature near Japan. Especially in power plants that use seawater as cooling water, jellyfish may flow in a large amount during the daytime in the summer when power supply is tight, temporarily exceeding the collection capacity of the dust removal equipment. . Generally, a screen used in a dust removing device has a mesh shape and an opening size of about 10 mm. Jellyfish are collected by the screen of the dust removing device, and collected and removed by rotating the screen. However, if a large amount of jellyfish enters the water channel within a short time, it will exceed the collection capacity of the dust removal device and stay on the upstream side of the device. If it does so, the screen of an apparatus cannot pass water, a water level difference will generate | occur | produce greatly between the upstream and downstream of an apparatus, and an apparatus may be damaged by water pressure. However, stopping or reducing the amount of water intake to reduce the difference in water level should be avoided as much as possible in the case of power generation facilities because it directly leads to a decrease in power generation.

In general, jellyfish and dust that flow into the intake channel move downstream while floating near the water surface. Therefore, conventionally, a fixed bar screen is installed on the upstream side of the dust remover to disperse and collect jellyfish and dust in the upper part of the water flow.
Further, the dust removal system disclosed in Patent Document 1 includes a second dust remover in which a screen is installed at a predetermined depth from the water surface, and a screen on the entire surface of the water channel in the depth direction and width direction to the water channel bottom on the downstream side of the second dust remover. The first dust remover disposed, and a guide member that is installed on the upstream side of the second dust remover and extends to the bottom side from the lower end of the second dust remover in the vertical direction, When there is a large amount of dust, the dust is removed by the second dust remover and the guide member to reduce the dust reaching the first dust remover.

JP-A-2015-86519

However, in the case of intake channels using seawater, the water level is not constant but constantly changing. For this reason, the conventional fixed screen and the dust remover of Patent Document 1 require some sort of traction device that moves up and down in accordance with the change in the water level in order to cope with this change in the water level, and a sensor for measuring the change in the water level is separately provided. Necessary.
In the dust removing device attached with the traction device, there is a problem that it is difficult to maintain the fixed position in the water channel by the external force caused by the flowing water including the dust because the flowing water force acts on the device.

  Therefore, in view of the problems of the above-described conventional technology, the present invention provides an aquatic treatment apparatus capable of continuing a stable operation while suppressing a sudden load applied to the dust removal apparatus when a large amount of dust is temporarily introduced into the intake channel. It aims to provide aquatic recovery methods.

As a first means for solving the above-mentioned problems, the present invention includes a screen portion that is inclined at a predetermined angle with respect to the water flow direction and collects dust, and a float that is attached to the screen portion and provides buoyancy. Collecting means,
A suction unit that is connected to the screen unit from the ground via a hose and sucks the dust from the upper part of the collecting surface; and a collecting unit that has a collecting unit that separates and collects the dust sucked by the suction unit. ,
Connected to the collecting means from the ground, a rope body that floats the collecting means to a predetermined depth of the water channel,
It is in providing the aquatic organism recovery device characterized by comprising.
According to the first means, it is possible to maintain the screen portion in the vicinity of the water surface regardless of fluctuations in the water level, and to temporarily collect a large amount of aquatic organisms flowing in upstream of the dust removing device. Can be operated.

As a second means for solving the above-mentioned problem, the present invention is the first means, wherein the float is arranged along a longitudinal direction of an upper end of the screen portion, and a lower end of the screen portion. A second float installed along the longitudinal direction, and a buoyancy adjusting unit for supplying air to or exhausting air from the first and second floats,
The buoyancy adjusting unit is to provide an aquatic organism recovery apparatus satisfying a relation of f1 <f2 when a water depth of the first float is f1 and a water depth of the second float is f2. .
According to the second means, even when the water level of the water channel changes due to tidal currents, the screen portion can be maintained near the water surface (predetermined depth from the water surface) according to the change in the water level, and dust can be captured. Can be collected.

As a third means for solving the above-mentioned problems, the present invention provides the first or second means, wherein the cable body supports the collecting means so as to be movable in the width direction of the water channel. An object of the present invention is to provide an aquatic organism recovery apparatus comprising a striate body and a second striate body that supports the collecting means so as to be movable in the depth direction of the water channel.
According to the third means, even when the water level of the water channel changes due to the tidal current, the collecting surface of the screen portion is inclined at a predetermined angle with respect to the water flow direction, and near the water surface (a predetermined depth from the water surface). ) And can collect dust.

As a fourth means for solving the above-mentioned problems, the present invention provides a flat screen portion for collecting dust that is inclined at a predetermined angle with respect to the water flow direction at a predetermined angle with respect to the width direction center of the water channel, and the water surface. A step of installing a collecting means using a striated body and a float in the vicinity;
A step of collecting the dust from the screen portion by a suction portion of the ground collecting means connected via the hose with the collecting means;
A step of separating and recovering the dust with the recovery means;
It is in providing the aquatic organism recovery method characterized by having.
According to the fourth means, it is possible to maintain the screen portion in the vicinity of the water surface regardless of fluctuations in the water level, and to recover aquatic organisms that temporarily flow in a large amount upstream of the dust removing device. Can be operated.

  According to the present invention, jellyfish can be collected before flowing into the dust removing device so as not to cause a large load fluctuation in the dust removing device. Therefore, emergency measures such as water intake restriction can be avoided even when a large amount of dust adheres to the dust removal device and exceeds the recovery capacity during a sudden attack of the dust.

It is the schematic of the aquatic organism recovery device of the present invention. It is a perspective view of a collection means. It is a side view of a collection means. It is a perspective view of a dust remover.

  Embodiments of the aquatic organism recovery apparatus and the aquatic organism recovery method of the present invention will be described below in detail with reference to the accompanying drawings. The garbage to be collected in the present invention includes aquatic organisms such as jellyfish that float while floating near the water surface of the waterway, and other driftwood, fallen leaves, and garbage that float near the water surface.

[Aquatic organism recovery device 10]
FIG. 1 is a schematic view of the aquatic organism recovery apparatus of the present invention. FIG. 2 is a perspective view of the collecting means. FIG. 3 is a side view of the collecting means.
As shown in the figure, the aquatic organism recovery apparatus 10 of the present invention has a screen part 22 that is inclined at a predetermined angle with respect to the water flow direction and collects dust, and a float 30 that is attached to the screen part 22 and provides buoyancy. A collecting means 20, a suction part 42 connected to the screen part 22 through a hose from the ground 14 and sucking the dust from the upper part of the collecting surface; and the dust sucked by the suction part 42 is separated into water. A collecting unit 40 having a collecting unit 50 for collecting, and a strip 60 connected to the collecting unit 20 from the ground 14 to float the collecting unit 20 to a predetermined depth of the water channel 12; Main basic configuration.

[Collecting means 20]
The collecting means 20 includes a screen portion 22 and a float 30.
The screen unit 22 has a collecting surface that allows water to pass through and collects dust, and is formed in a flat plate shape. A specific configuration of the screen portion 22 is that a plurality of nets 24 are vertically attached to a rectangular frame 23 and a gap 26 is provided between adjacent nets. The net 24 can collect dust by applying a metal bar shaped bar. A gap 26 between the nets 24 is a flowing water space (a gap through which dust is passed without being collected). A collection tube 28 is provided on the upper portion of the screen portion 22. The collection pipe 28 is a pipe attached along the longitudinal direction of the upper part of the collection surface of the screen unit 22, and has an opening 28 a at a position facing the collection surface and a branch pipe 28 b at the upper part. The opening 28a is a location where dust that has moved from the lower part to the upper part along the collecting surface is collected. The branch pipe 28b is a pipe to which a hose of the collecting means 40 described later is connected.

The float 30 includes first and second floats 32 and 34 and a buoyancy adjusting unit (not shown).
The first float 32 is attached to the back surface of the collection surface along the width direction of the upper portion of the flat screen portion 22. The second float 34 is attached to the back surface of the collection surface along the width direction of the lower portion of the flat screen portion 22.
The buoyancy adjusting unit is connected to the first and second floats 32 and 34 and includes an air pump and an opening / closing valve. The buoyancy adjusting unit can supply air to the float 30 and can exhaust air from the float 30 by opening the opening / closing valve. Such a buoyancy adjusting unit is installed by adjusting the amount of air so that the collection surface of the float 30 with respect to the water flow direction is inclined at a predetermined angle, and is located at a predetermined depth from the water surface. The buoyancy adjustment unit can adopt a configuration in which the air supply / discharge amount is adjusted by remote operation via a wireless line.

[Recovery means 40]
The collection unit 40 includes a suction unit 42 and a collection unit 50.
The suction part 42 includes a suction water pump 44 and suction and discharge hoses 46 and 48. The suction water pump 44 is connected to the branch pipe 28 b of the collection pipe 28 of the screen portion 22 via a suction hose 46 and sucks the dust collected by the collection means 20. The suction water pump 44 is connected to a recovery unit 50 (to be described later) via a discharge hose 48 and discharges dust to the recovery unit 50.
The suction hose 46 has a negative pressure resistance capable of withstanding the negative pressure of the suction water pump 44, and is configured to be expandable and contractable according to a change in the water level.
The collection unit 50 includes a drainer 52 and a collection box 54. The drainer 52 is a screen that separates dust and water. The collection box 54 is a container that dehydrates jellyfish using hot water, chemicals, etc., and temporarily stores them.

[Strip 60]
The cord body 60 is composed of first and second cord bodies 62 and 64, and one end thereof is connected to the anchor 61 of the ground 14.
The first strip 62 is a wire rope that can move the collecting means 20 in the width direction of the water channel 12.
The second rope body 64 is a wire rope that has one end connected to the anchor 61 and the other end connected to the mounting bracket 28c of the collection tube 28 to prevent the collection means 20 from falling in the water channel 12. .
In addition, the rope body 60 is configured to be able to be pulled out or rolled up in accordance with a change in the water level so that it can be extended so as not to interfere when the collecting means 20 is disposed near the water surface.

Due to such a configuration of the rope body 60 and the float 30, the collection means 20 is installed so that its own weight (W in FIG. 3) of the collection means 20 is floated to a predetermined depth (near the water surface) from the water surface. Air is supplied to the float 30 in consideration. At this time, the buoyancy adjustment unit sets the water depth of the first float 32 to f1 and the water depth of the second float 34 so that the collection surface is inclined at a predetermined angle (inclined by 45 degrees as an example) with respect to the water flow direction. When f2, air is supplied to the first and second floats 32 and 34 so as to satisfy the relationship of f1 <f2.
Then, the position adjustment is performed using the first striated body 62 so that the collecting means 20 is located near the center (width direction) of the water channel 12. Further, the position is adjusted by the second cable body 64 so that the collecting means 20 does not fall on the bottom surface of the water channel. By performing such position adjustment, the collecting means 20 can be installed near the center of the water channel 12 (width direction) and near the water surface.

[Aquatic recovery method]
The aquatic organism recovery method of the present invention having the above configuration will be described below.
The aquatic organism recovery device 10 is installed on the upstream side of the dust removal device in the water channel 12. Installation of the collection means 20 of the aquatic organism recovery apparatus 10 is performed using the float 30 and the ridge body 60 so as to be positioned at the center in the width direction of the water channel 12 and in the vicinity of the water surface.
At this time, the collection surface is inclined at a predetermined angle with respect to the direction of the water flow, and the collection means 20 of the aquatic organism recovery apparatus 10 includes the ridge body 60 and the float even if the water level changes in the water channel such as low tide or high tide. 30 can maintain the width direction center of the water channel 12 and the vicinity of the water surface.
Further, even if the screen portion 22 is subjected to a load in the water flow direction due to a change in the water flow and rotates as indicated by an arrow A in FIG. 3, the air of the first and second floats 32 and 34 using the buoyancy adjustment portion is used. The supply amount is adjusted to return to a predetermined angle.
The jellyfish floats in the vicinity of the water surface and flows downstream near the center of the water channel where the flow velocity of the water channel 12 is high. The jellyfish that collects in the vicinity of the running water surface of the water channel 12 are collected by the collecting surface of the screen unit 22 of the collecting means 20. The jellyfish that has moved upward along the collection surface is sucked from the opening 28 a of the collection tube 28. The jellyfish that has passed through the suction hose 46 is discharged from the discharge hose 48 to the collection unit 50 via the suction water pump 44 on the ground 14.
In the recovery unit 50, jellyfish water separation processing is performed by the drainer 52 in the previous stage. Next, the jellyfish moved to the collection box 54 is subjected to dehydration using hot water, chemicals, or the like.

According to the aquatic organism recovery apparatus and the aquatic organism recovery method of the present invention, even when the water level of the water channel changes due to the tidal current, the screen surface is inclined at a predetermined angle with respect to the water flow direction. In addition, it can be maintained near the water surface (a predetermined depth from the water surface), and the jellyfish can be collected before flowing into the dust removing device so as not to cause a large load fluctuation in the dust removing device. Therefore, emergency measures such as water intake restriction can be avoided even when a large amount of dust adheres to the dust removal device and exceeds the recovery capacity during a sudden attack of the dust.
The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
Moreover, the present invention is not limited to the combinations shown in the embodiments, and can be implemented by various combinations.

  INDUSTRIAL APPLICABILITY The present invention is particularly useful as an aquatic organism recovery apparatus and an aquatic organism recovery method on the upstream side of a water channel of a dust removal apparatus provided with a rotary net frame that collects dust in water intake equipment such as a plant.

10 ......... Aquatic organism recovery device, 12 ......... Water channel, 14 ......... Ground,
20 ......... Carrying means, 22 ......... Screen part, 23 ......... Frame, 24 ......... Net, 26 ......... Gap between nets, 28 ......... Collecting tube, 28a ......... Opening, 28b ... Branch pipe, 28c ... Mounting bracket,
30 ......... Float, 32 ......... First float, 34 ......... Second float,
40 ......... Recovery means, 42 ......... Suction part, 44 ......... Suction water pump, 46 ......... Suction hose, 48 ......... Discharge hose,
50 ......... Recovery part, 52 ......... Drainer, 54 ......... Recovery box,
60 .... the striatum, 61 .... anchor, 62 .... the first striatum, 64 .... the second striatum.

Claims (4)

A screen unit that collects dust by inclining at a predetermined angle with respect to the water flow direction;
A suction unit that is connected to the screen unit from the ground via a hose and sucks the dust from the upper part of the collecting surface; and a collecting unit that has a collecting unit that separates and collects the dust sucked by the suction unit. ,
Connected to the collecting means from the ground, a rope body that floats the collecting means to a predetermined depth of the water channel,
An aquatic organism recovery apparatus comprising: The float is supplied with air to the first float installed along the width direction of the upper end of the screen portion, the second float installed along the width direction of the lower end of the screen portion, and the first and second floats. Or it consists of a buoyancy adjustment unit that exhausts air,
2. The aquatic organism recovery apparatus according to claim 1, wherein the buoyancy adjusting unit satisfies a relationship of f <b> 1 <f <b> 2 when a water depth of the first float is f <b> 1 and a water depth of the second float is f <b> 2. .   The strip body includes a first strip body that supports the collecting means so as to be movable in a width direction of the water channel, and a second rope that supports the collection means so as to be movable in a depth direction of the water channel. It consists of a body, The aquatic organism recovery device of Claim 1 or 2 characterized by the above-mentioned. The step of inclining the collecting surface of the flat screen portion for collecting dust to a predetermined angle with respect to the water flow direction, and installing the collecting means using the striation body and the float in the center of the width direction of the water channel and in the vicinity of the water surface When,
A step of collecting the dust from the screen portion by a suction portion of the ground collecting means connected via the hose with the collecting means;
A step of separating and recovering the dust with the recovery means;
A method for recovering aquatic organisms, comprising: