JPH0754332A - Jelly fish transfer device in intake pass - Google Patents

Abstract

PURPOSE:To effectively remove jelly fish flowing into an intake pass. CONSTITUTION:A guidance screen 9, which width is gradually narrowed from the entrance of an intake pass 2 toward the inner part, is provided by spreading it along the water surface in an appropriate depth. While the convergent part of the pass formed by the guidance screen 11 part is made a collection screen 11, another screen 11a is provided at the bottom in a suitable depth. Bubbling pipes 12 for spouting air bubble are suitably distributed and arranged at the bottom of the guidance pass formed by the guidance screen 9 and at the bottom of the collection screen 11 while a pipe 14 connected to the convergent part of the collection screen 11 is connected to a fish pump 15 and the delivery pipe 16 of this pump 15 is guided to a sea area beyond the facility.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facility such as a nuclear power plant or a thermal power plant that uses a large amount of sea water as cooling water without damaging the jellyfish that has flowed into the intake channel. The present invention relates to a device for transferring to the sea area.

[0002]

2. Description of the Related Art At present, in nuclear power plants and thermal power plants, an intake channel is provided from the sea to the cooling device, and seawater is introduced through this intake channel by a powerful pump to rotate the turbine exhaust (rotate the turbine). High pressure steam after depressurization)
After cooling, this seawater is discharged into the sea. In order to introduce seawater with such a powerful pump, jellyfish and other suspended matter near the inlet (intake) of the cooling water intake channel flow into the intake together with seawater, and as a result, those suspended matter are discharged from the cooling device. If the cooling device is stopped due to the eyes and the power generation device is also stopped, the damage will be serious.

For this reason, conventionally, in order to prevent the inflow of suspended solids such as jellyfish, a net inclined forward from the sea surface to the bottom of the sea is installed in front of the intake so as to surround the intake. In addition, in order to prevent the jellyfish that flowed in through the lower opening of the jellyfish prevention net on the front of the intake from flowing into the cooling device, a dust removal device (suspended material such as jellyfish clogging the iron grid screen etc. A device for scooping by power) was installed in the waterway.

[0004]

However, in the above-mentioned conventional dust removing device, when a large amount of jellyfish is generated such that the jellyfish abnormally occurs and the sea surface becomes a monochromatic jellyfish, the jellyfish prevention net is opened from the lower opening. The inflow of jellyfish may be large, and the waterway may become full of jellyfish and the water surface may not be visible. In such a case, since the dust remover described above cannot scoop up a certain amount of jellyfish, the dust remover will no longer function as a dust remover.
Due to the large amount of jellyfish that flow into the cooling system, and as a result, the cooling system and the power generation system are shut down, and households, factories, hospitals, transportation facilities, traffic signals, etc., flood the junior high school, There was a risk of paralysis for hours or even days leading to a power outage panic. Most of the jellyfish scooped up by the dust remover were damaged and could not be discharged into the sea as they were, so they were landed, but even if the landed jellyfish were buried in the soil, there was a problem with the location. However, before embedding, there was a problem that a foul odor is emitted and may cause odor pollution.

[0005]

In order to solve the above-mentioned problems, in the present invention, a guide screen, which is gradually narrowed in width from the entrance of the intake channel toward the back, is stretched at an appropriate depth along the water surface. , A screen is also provided at the bottom of the guide screen with a suitable depth as the collection part of the water channel converging part, and a bubbling pipe for jetting bubbles is appropriately provided at the bottom of the guidance water channel by the guidance screen and the bottom part of the collection screen part. The pipes connected to the converging part of the recovery screen are connected to a fish pump that does not damage the jellyfish, and the discharge pipes of this pump are guided to the sea area outside the facility to install a jellyfish transfer device in the intake channel. Constitute.

Further, in the present invention, a screen having a plane shape of an isosceles triangle as a bottom surface, and a screen having a side surface of a substantially right triangle shape as standing on both sides of the bottom surface screen is provided with a float. The upper edge of the screen is slightly raised above the water surface, and a bubbling pipe for ejecting bubbles is arranged on the bottom screen to form a recovery screen, and a flexible hose is connected to the converging part of the recovery screen. At the same time, a transfer rope was connected to the recovery screen, and the recovery screen was floated on the water passage so that it could be moved laterally at will, and the flexible hose was connected to a fish pump that did not damage the jellyfish. The discharge pipe is guided to the sea area outside the facility to form a jellyfish transfer device in the intake channel.

[0007]

Since the first aspect of the present invention is configured as described above, the jellyfish prevention net provided on the entire intake port and the jellyfish that has flowed into the waterway through the lower opening of the curtain wall are guided by the guide screen to the front opening. It is led to the outlet of the recovery screen further downstream, but during this time bubbles bubble out from the bubbling pipes distributed at the bottom of the intake channel to create an upward flow in the water, so the jellyfish near the bottom of the intake channel is also described above. It is raised by the upward flow and guided to the recovery screen section. Since a bubbling pipe is also provided at the bottom of the recovery screen, jellyfish does not adhere to the screen. The jellyfish guided to the outlet of the recovery screen is sucked together with water by the operation of the fish pump, and then discharged into the sea area outside the facility through the discharge pipe and carried away to the open sea by natural tide.

Since the second aspect of the present invention is configured as described above, the floating type recovery screen is laterally moved to the position where the jellyfish has flown in the water channel to recover the jellyfish that has flowed into the water channel. Can be captured within the screen. Since there is a bubbling tube at the bottom of this recovery screen, there is no risk of jellyfish sticking to the screen. The jellyfish in the collection screen is sucked together with water by the operation of the fish pump, then discharged to the water outside the facility through the discharge pipe, and taken away to the open sea by natural tide.

That is, according to the device of the present invention, most of the jellyfish that has flowed into the intake channel is collected by the collecting screen, and is sucked and removed by the operation of the fish pump. The fish pump used is a special volute pump that has a proven track record for transferring live fish, so there is no risk of the jellyfish being damaged.
Therefore, according to the device of the present invention, the stoppage of the cooling device of the power plant due to the inflow jellyfish and the damage caused by the stoppage of the power generation device can be prevented.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In the figure, 1 is a quay on the coast, 2 is an intake channel that guides seawater from an intake port provided on the quay 1 to a cooling device, 3 is a side wall of the intake channel 4, and 4 (see FIGS. 2 and 3) is the intake channel. Bottom of the
5 is a curtain wall provided in front of the intake port of the intake channel 2, 6 is a dust remover installed at the back of the intake channel 2, 7 is seawater,
Reference numeral 7a is the surface of the water, and reference numeral 8 (see FIGS. 3 and 4) is a jellyfish floating in the seawater 7.

FIGS. 1 to 4 show the first embodiment of the invention. In this embodiment, two guides of appropriate width are provided in the center of the curtain wall 5 provided in front of the water intake. While connecting one end 9a of the screen 9 (may be a net), the two guide screens 9 are extended toward the back of the water channel 2 in a V shape, and the other end 9b of each guide screen 9 is a dust removing device. Connect to both ends of 6.

A large number of floats 10 are attached to the upper edge 9c of each guide screen 9 at appropriate intervals to stretch the guide screen 9 along the water surface 7a at an appropriate depth. A screen 11a is also provided at the bottom of a suitable depth as the recovery screen portion 11 having a triangular top portion of the converging portion of the water passage formed by the side wall 3 of the water intake passage 2.

Further, bubbling pipes 12 for jetting bubbles are appropriately distributed and arranged at the bottom of the guiding water channel sandwiched by the above-mentioned guiding screen 9 and the side wall 3 and the bottom of the collecting screen portion 11, and the collecting screen is also provided. The tube 14 connected to the converging part of the part 11 via the mouse 13
Is connected to a fish pump 15 that does not damage, and the discharge pipe 16 of this pump 15 is guided to the sea area outside the facility.

Since the first aspect of the present invention is constructed as described above, the jellyfish 8 which has flown into the water channel 2 through the jellyfish prevention mesh provided on the front surface of the water intake port 2 or the lower opening of the curtain wall 5 is a guide screen 9. And the side wall 3 lead to the outlet of the recovery screen 11 downstream of the front opening. During this time, bubbles 17 are jetted from the bubbling pipe 12 distributed at the bottom of the intake channel 2 as shown in FIG. The jellyfish 8 near the bottom of the intake channel 2 in order to create an upward flow in the water.
Is also raised by the ascending flow and guided to the recovery screen section 11. As shown in FIG. 4, the bubbling tube 12 is also provided at the bottom of the recovery screen, so that the jellyfish 8 does not adhere to the screens 9 and 11a by the action of the bubbles 17. Then, the jellyfish 8 guided to the outlet of the recovery screen 11 is sucked together with water through the mouth 13 and the pipe 14 by the operation of the fish pump 15, and then discharged to the sea area outside the facility through the discharge pipe 16 and the natural tide flows. Taken to the open sea.

5 to 7 show a second embodiment of the invention, in which the same reference numerals as those used in the drawings denote the same elements. In this embodiment, as shown in detail in FIGS. 6 and 7, a screen 18 having a substantially isosceles triangular planar shape as a bottom surface and a side surface having a substantially right triangle triangular shape as shown in FIG. 4 floats 2 are provided on the bottom 19 of the bottom screen 18 on both sides.
0 is provided so that the upper edge of the screen 19 slightly floats above the water surface 7a, and the bubbling pipe 12 for ejecting bubbles is arranged on the lower surface of the bottom screen 18 to form a recovery screen 21. Reference numeral 21a is an angle member that connects the respective parts of the recovery screen 21.

Further, the flexible hose 22 is connected to the converging part of the recovery screen 21 via the mouse 13, and the moving rope 23 is connected to the recovery screen 21 as shown in FIG. Then, the recovery screen 21 is floated on the water intake 2 and the transfer rope 23 is used to move the water intake 2
The flexible hose 22 is connected to a fish pump 15 which does not damage the jellyfish, and the discharge pipe 16 of this pump is guided to the sea area outside the facility.

Reference numeral 24 in FIG. 5 is a guide pulley for the moving rope 23, 25 is a winch for the rope 23, 26 is a relay mouse for the flexible hose 22, and 27 is a fixed rope for the relay mouse 26.

Since the second aspect of the present invention is constructed as described above, the floating type recovery screen 21 is connected to the water channel 2.
Inside, winch 25 to the position where jellyfish comes in
Also, the jellyfish 8 that has flowed into the intake channel 2 can be taken into the recovery screen 21 by laterally moving via the rope 23. Since the bubbling pipe 12 is also present at the bottom of the recovery screen 21, the jellyfish 8 is unlikely to adhere to the screens 18 and 19. Then, the jellyfish 8 in the collection screen 21 is sucked together with water through the mouse 13 and the flexible hose 22 by the operation of the fish pump 15, and then discharged to the sea area outside the facility through the discharge pipe 16, and the natural sea current causes the sea water to flow. Taken away by.

[0019]

As described above, according to the device of the present invention, the jellyfish 8 flowing into the intake channel 2 is efficiently collected by the action of the collecting screen and the bubble discharging bubbling pipe 12, When the fish pump 15 is operated, it is sucked and removed. The fish pump 15 used is a special volute pump, which has a proven track record for transporting live fish, so there is no risk of the jellyfish being damaged. Therefore, according to the device of the present invention, the stoppage of the cooling device of the power plant due to the inflow jellyfish, and the damage caused by the stoppage of the power generation device generated thereby can be prevented, and it is not necessary to treat the jellyfish on the ground. The excellent effect of preventing pollution can be obtained.

[Brief description of drawings]

FIG. 1 is a plan view of an intake channel in which the device of the present invention is set.

FIG. 2 is a vertical cross-sectional view taken along the line AA of FIG.

FIG. 3 is a vertical sectional view for explaining the operation.

FIG. 4 is a sectional view for explaining the action taken along the line BB of FIG.

FIG. 5 is a plan view of an intake channel showing another embodiment of the present invention.

6 is a plan view of the recovery screen of FIG.

FIG. 7 is a side view of the recovery screen.

[Explanation of symbols]

 1 Wharf 2 Intake channel 3 Side wall 4 Bottom surface 5 Curtain wall 6 Dust remover 7 Seawater 7a Water surface 8 Jellyfish 9 Induction screen 10 Float 11 Recovery screen part 11a Screen 12 Bubbling pipe 13 Mouse 14 pipe 15 Fish pump 16 Discharge pipe 17 Bubble 18 18 Equilateral triangular screen 19 substantially right triangular screen 20 float 21 collection screen 21a angle material 22 flexible hose 23 moving rope 24 guide pulley 25 winch 26 relay mouse 27 fixed rope

Claims (2)

[Claims] 1. A guide screen having a lateral width that gradually narrows from the entrance of the intake channel to the depth is stretched along the water surface at an appropriate depth, and the converging part of the water channel by this guide screen is used as a recovery screen part. A screen is also provided at the bottom of the shell, and bubbling pipes for ejecting bubbles are appropriately distributed and arranged at the bottom of the guide water channel by the guide screen and the bottom of the recovery screen part, and connected to the converging part of the recovery screen part. The jellyfish transfer device in the intake channel, characterized in that the above-mentioned pipe was connected to a fish pump that does not damage the jellyfish, and the discharge pipe of this pump was led to the sea area outside the facility. 2. A screen having a plane shape of an isosceles triangle as a bottom surface, and a side surface of a screen having a substantially right triangle shape which is erected on both sides of the bottom surface screen is provided with a float so as to be above the screen from the water surface. A bubbling pipe for ejecting bubbles is arranged on the bottom screen to form a recovery screen, a flexible hose is connected to the converging part of the recovery screen, and a moving rope is used. Is connected to a recovery screen, the recovery screen is floated on the water channel so that it can be moved laterally at will, and the flexible hose is connected to a fish pump that does not damage the jellyfish, and the discharge pipe of this pump is located outside the facility. The jellyfish transfer device in the intake channel, which is characterized in that it is led to the sea area.