Jellyfish inflow prevention system of power plant intake

Abstract

The present invention relates to a system for preventing jellyfish inflow into a power plant water intake, and more specifically, to a system for preventing jellyfish inflow into a power plant water intake that first suppresses jellyfish access to the water intake and secondarily lures and removes them through a net to a jellyfish removal device, thereby blocking the inflow of jellyfish into the water intake and enabling stable operation of the power plant. To this end, a jellyfish inflow prevention system for a power plant water intake is provided, comprising: a water intake for seawater inflow; guide walls formed on both sides of the water intake to form a water intake channel for seawater inflow into the water intake; an ultra-low frequency generator installed in front of the water intake; a bubble generator installed to artificially generate a large amount of bubbles in seawater; a net installed across the water intake channel between the guide walls, inclined from the bottom of one side of the water intake channel to the upper side of the water intake channel to lure jellyfish heading toward the water intake to the upper side of the water intake channel; and a jellyfish removal device for removing jellyfish lured to the upper side of the water intake channel through the net.

Description

Technology Field

[0001] The present invention relates to a system for preventing jellyfish inflow into a power plant water intake, and more specifically, to a system for preventing jellyfish inflow into a power plant water intake that first suppresses jellyfish approach to the water intake through an ultra-low frequency generator and secondarily attracts and removes jellyfish through a net. Background Technology

[0002] Power plants installed on the coast, such as nuclear power plants, require various system waters to operate their facilities, and these waters are primarily supplied by drawing in seawater. In the process of introducing seawater as a supply, marine organisms living in the seawater, such as jellyfish, shrimp, krill, salps, and seaweed, are sometimes carried in along with it. If these marine organisms or foreign substances contained in the seawater enter the power generation facility, they can cause the facility to shut down or lead to various malfunctions. Therefore, there is a need for technology to block the entry of marine organisms into the power plant's water intake.

[0003] Accordingly, various equipment such as bar screens, trash rakes, traveling water screens (TWS), and drum screens are being used at power plant water intakes to prevent the inflow of marine organisms. While these conventional facilities are generally effective for filtering out marine organisms, they are insufficient for filtering out large quantities of marine organisms that flow in during specific periods. In particular, jellyfish are frequently flowing into power plant water intakes due to climate change, such as global warming, but since the aforementioned screen-type filtering equipment is not efficient at filtering out jellyfish, equipment for filtering out jellyfish is required. Prior art literature

[0005] Republic of Korea Registration No. 10-2354095 The problem to be solved

[0006] The present invention was devised to solve the aforementioned problems, and the objective of the present invention is to provide a jellyfish inflow prevention system for a power plant water intake that can block the inflow of jellyfish into the water intake by first suppressing the approach of jellyfish to the water intake through ultra-low frequency generation, and secondarily floating the jellyfish through bubble generation and a net and removing them through a separate treatment device. means of solving the problem

[0007] To achieve the above-mentioned objective, the present invention provides a system for preventing jellyfish inflow into a power plant intake, comprising: an intake port for seawater inflow; guide walls installed on both sides of the intake port to form intake channels for seawater inflow into the intake port; an ultra-low frequency generator installed in front of the intake port; a bubble generator installed to artificially generate a large amount of bubbles in seawater; a net installed across the intake channel between the guide walls, inclined from the bottom of one side of the intake channel to the upper side of the intake channel to lure jellyfish heading toward the intake port to the upper side of the intake channel; and a jellyfish removal device for removing jellyfish lured to the upper side of the intake channel through the net.

[0008] At this time, it is preferable that the above-mentioned mesh be installed obliquely with respect to the flow of seawater between the guide walls when the water intake channel is viewed in a planar view.

[0009] In addition, the jellyfish removal device preferably includes: a reservoir in which jellyfish are collected; a crusher installed to receive and crush jellyfish from the reservoir; and a measuring device installed to measure the amount of crushed jellyfish transferred from the crusher.

[0010] At this time, it is preferable to include a control unit capable of controlling the amount and speed of bubble generation of the bubble generator according to the amount of crushed material measured by the measuring instrument. Effects of the invention

[0011] The jellyfish inflow prevention system for a power plant water intake according to the present invention has the following effects.

[0012] First, the present invention has the effect of preventing jellyfish from approaching the water intake by installing an ultra-low frequency generator near the water intake.

[0013] Second, the present invention has the effect of processing a large amount of jellyfish by increasing the efficiency of luring jellyfish to a jellyfish removal device for processing by floating them through a bubble generator and a net.

[0014] Third, since the bubble size and bubble generation speed of the bubble generator can be adjusted according to the amount of jellyfish inflow, the present invention has the effect of being able to quickly respond to the amount of jellyfish around the water intake.

[0015] Fourth, the present invention has the effect of preventing unexpected shutdowns of the power plant by blocking the inflow of jellyfish into the power plant's water intake, and enabling stable operation of the power plant by stably supplying seawater for cooling. Brief explanation of the drawing

[0016] FIG. 1 is a schematic diagram showing a jellyfish inflow prevention system for a power plant water intake according to a preferred embodiment of the present invention. FIG. 2 is a side view of the seabed where a jellyfish inflow prevention system for a power plant water intake is installed according to a preferred embodiment of the present invention. FIG. 3 is a plan view of the seabed where a jellyfish inflow prevention system for a power plant water intake is installed according to a preferred embodiment of the present invention. FIG. 4 is a schematic diagram showing the state in which processed jellyfish crushed material is transferred to a measuring instrument in a jellyfish inflow prevention system of a power plant water intake according to a preferred embodiment of the present invention. Specific details for implementing the invention

[0017] Terms and words used in this specification and claims are not limited to their ordinary or dictionary meanings, and must be interpreted in a meaning and concept consistent with the technical spirit of the invention, based on the principle that the inventor can appropriately define the concept of the terms to best describe his invention.

[0018] Hereinafter, a jellyfish inflow prevention system for a power plant water intake (hereinafter referred to as the "jellyfish inflow prevention system") according to a preferred embodiment of the present invention will be described with reference to the attached FIGS. 1 to 4.

[0019] The jellyfish inflow prevention system blocks the inflow of jellyfish into the water intake through ultra-low frequency generation and a net, thereby enabling stable operation of the power plant. As illustrated in FIG. 1, the jellyfish inflow prevention system includes an ultra-low frequency generator (100), a bubble generator (200), a net (300), a jellyfish removal device (400), and a control unit (500).

[0020] The infrasound generator (100) is a device that generates infrasound that jellyfish avoid, and serves to suppress jellyfish from approaching the water intake. The infrasound generator (100) is configured to block the inflow of jellyfish into the water intake in the first place. As shown in FIG. 3, the infrasound generator (100) is preferably installed on both sides of the guide wall (W) in front of the water intake, and is installed so as to generate infrasound in the direction opposite to the water intake. The infrasound range that jellyfish avoid is approximately 8 to 13 Hz.

[0021] The bubble generator (200) is a device for secondarily preventing the inflow of jellyfish into the water intake and is configured to artificially generate a large amount of bubbles in the sea. By artificially generating bubbles, the bubble generator (200) can cause jellyfish flowing into the water intake to float. That is, the bubble generator (200) passes through the ultra-low frequency generation range of the ultra-low frequency generator (100) and artificially causes a large amount of jellyfish heading toward the water intake along the seawater flow to float through the generation of bubbles, thereby changing the direction of jellyfish inflow upward. As shown in FIG. 2, the bubble generator (200) is installed in multiple locations on the seabed along the water intake channel (10) of the water intake, and operates intermittently or continuously by the control unit (500) described later to change the bubble size and generation speed according to the amount of jellyfish inflow (jellyfish generation amount signal).

[0022] The net (300) serves to filter out jellyfish flowing in along the seawater flow so that they do not enter the intake port, and also serves to lure (guide) them to the jellyfish removal device (400) for jellyfish treatment. As shown in FIG. 2, the net (300) is installed at an angle from the bottom of the intake channel (10) toward the top of the intake channel (10) to lure the jellyfish upward. The net (300), together with the bubble generator (200), effectively causes the jellyfish to rise upward. Additionally, as shown in FIG. 3, the net (300) is installed obliquely from one side to the other of the intake channel (10) with respect to the direction in which jellyfish flow toward the intake port. The net (300) serves not merely to filter out jellyfish, but to lure them to a jellyfish removal device (400) on the side of the guide wall (W) for jellyfish treatment. As described above, the net (300) is installed at an angle to the direction of seawater flow when viewed from the plane of the water intake channel (10), so that jellyfish are not caught in the net (300) but are effectively lured to the jellyfish removal device (400) along the angled net (300).

[0023] The jellyfish removal device (400) serves to remove jellyfish attracted along the net (300) and is installed on the other side of the water intake channel (10), as shown in FIG. 3. The jellyfish removal device (400) includes a water tank (410), a crusher (420), and a measuring device (430). The water tank (410) provides a space for collecting a large amount of jellyfish attracted after floating along the net (300). The crusher (420) is a device for crushing jellyfish stored in the water tank (410) and is installed on one side of the water tank (410). At this time, a transfer pipe (P) for transporting jellyfish is installed between the water tank (410) and the crusher (420), and although not shown, it is preferable to install a pump for sucking jellyfish from the water tank (410) to the crusher (420). The measuring device (430) is configured to measure the amount of crushed jellyfish from the crusher (420) and analyze the amount of jellyfish flowing into the water intake. That is, the measuring device (430) receives the crushed jellyfish from the crusher (420) and measures the amount of crushed jellyfish. The amount of crushed jellyfish can be measured by measuring the amount of crushed jellyfish flowing into the measuring device for a certain period of time through a sensor, or by detecting the amount of crushed jellyfish flowing into the measuring device for a certain period of time through a detection sensor (S) as shown in FIG. 4. At this time, it is preferable that the measuring device be provided in the form of a mesh-type container for drainage so that only the amount of pure crushed jellyfish can be measured.

[0024] The control unit (500) analyzes the amount of jellyfish generated in the sea around the water intake based on the amount of crushed jellyfish measured by the measuring device (430), and controls the operation of the bubble generator (200) according to the amount of jellyfish generated. The control unit (500) can control the bubble generator (200) to control the bubble size and bubble generation speed as the amount of jellyfish generated increases. Through such control of the bubble generator (200) by the control unit (500), jellyfish can be effectively removed.

[0025] Below, we will examine the process of removing jellyfish using the jellyfish inflow prevention system for the power plant water intake composed of the above-described configuration.

[0026] The manager operates the ultra-low frequency generator (100) to generate ultra-low frequency in the opposite direction of the water intake, thereby primarily suppressing jellyfish from approaching the water intake. At this time, the ultra-low frequency generator (100) does not block all of the large number of jellyfish, and due to the flow of seawater, the jellyfish may pass through the ultra-low frequency generator (100) and flow into the water intake.

[0027] The manager operates the bubble generator (200) to generate bubbles as shown in FIGS. 2 and 3. At this time, the jellyfish are floated by the bubbles, and while floating, they move along the seawater flow to the net (300), thereby secondarily suppressing the inflow of jellyfish. Specifically, after floating by the bubbles, the jellyfish move toward the upper part of the net (300), or jellyfish located at the lower part of the net (300) are lured along the net (300) to the upper part of the net (300) along with the bubbles. Subsequently, the jellyfish gathered at the upper part of the net (300) flow along the net to the reservoir (410) on one side of the guide wall (W) and are collected in the reservoir (410).

[0028] The manager operates the jellyfish removal device (400) to move the jellyfish in the reservoir (410) to the crusher (420), and the crusher (420) crushes the jellyfish. The crushed jellyfish is moved to the measuring device (430), and the measuring device measures the amount of crushed material flowing in from the crusher (420) for a certain period of time. The control unit (500) analyzes the amount of jellyfish generated in the sea through the amount of crushed material measured for a certain period of time via the measuring device (430) and controls the operation of the bubble generator (200). As this series of processes continues, the jellyfish flowing into the water intake are removed. Meanwhile, the above-mentioned series of processes is not carried out sequentially but simultaneously to perform the jellyfish removal operation.

[0029] As explained above, the jellyfish inflow prevention system for a power plant water intake according to the present invention prevents jellyfish from entering the intake multiple times and enables the control of the bubble size and generation speed of the bubble generator through the amount of crushed jellyfish removed. Accordingly, the present invention blocks the inflow of jellyfish into the intake, thereby enabling the stable operation of the power plant.

[0030] Although the present invention has been described in detail with respect to specific embodiments described above, it is obvious to those skilled in the art that various modifications and variations are possible within the scope of the technical spirit of the invention, and such modifications and variations are naturally included in the appended claims. Explanation of the symbols

[0031] 10 : Water intake route 100 : Infrared generator 200 : Bubble generator 300 : Net 400 : Jellyfish removal device 410 : Water tank 420 : Grinder 430 : Measuring instrument 500 : Control unit W : Guide wall P : Transfer pipe S: Detection sensor

Claims

Claim 1 A method for preventing the inflow of jellyfish into a water intake channel formed by guide walls installed on both sides of a water intake channel for seawater inflow, comprising: a step of suppressing the approach of jellyfish to the water intake channel by operating an ultra-low frequency generator installed in front of the water intake channel to generate ultra-low frequency in the opposite direction of the water intake channel; a step of changing the direction of inflow of jellyfish toward the water intake channel by causing jellyfish passing through the ultra-low frequency generation range toward the water intake channel to rise by bubbles generated by a bubble generator installed on the seabed along the water intake channel to change the direction of inflow of the jellyfish upward; a step of luring the jellyfish toward the upper side of the water intake channel along a net installed at an angle to the seawater flow when viewed from a plane and inclined from the bottom of one side of the water intake channel toward the upper side of the water intake channel; a step of collecting the jellyfish lured along the net in a reservoir, and crushing the jellyfish supplied from the reservoir in a crusher and supplying it to a measuring device; and the above, provided in the form of a mesh-type container for drainage A method for preventing the inflow of jellyfish into a power plant water intake, comprising: a step of detecting jellyfish crushing material flowing into a measuring device for a certain period of time using a detection sensor and measuring the amount of jellyfish crushing material during the said certain period of time; and a step of analyzing the amount of jellyfish generated in the sea around the water intake through the amount of jellyfish crushing material measured during the said certain period of time, and changing the bubble size and bubble generation speed of the bubble generator according to the analyzed amount of jellyfish generated material; wherein the inhibition of jellyfish approach, the surfacing and attraction of jellyfish, the crushing of jellyfish, the measurement of the amount of jellyfish crushing material, and the control of the bubble generator are performed simultaneously. Claim 2 A method for preventing jellyfish inflow into a power plant water intake, wherein, in claim 1, the ultra-low frequency has a frequency of 8 Hz to 13 Hz. Claim 3 A method for preventing jellyfish inflow into a power plant intake, wherein, in claim 1, the bubble generating device is installed in multiple numbers on the seabed along the water intake path and operates intermittently or continuously. Claim 4 In claim 1, the step of measuring the amount of crushed jellyfish is to measure the amount of pure crushed jellyfish while draining through the mesh-type container, a method for preventing jellyfish inflow into a power plant water intake. Claim 5 A method for preventing jellyfish inflow into a power plant water intake, wherein, in claim 1, the step of luring the jellyfish to the upper side of the water intake channel is to lure the jellyfish located at the lower end of the net along the net to the upper end of the net together with the bubbles. Claim 6 A jellyfish inflow prevention system for a power plant intake, comprising an intake port for seawater inflow and guide walls installed on both sides of the intake port to form an intake channel, the system comprises: an infrasound generator installed in front of the intake port and generating infrasound in the opposite direction of the intake port to suppress jellyfish from approaching the intake port; a bubble generator installed on the seabed along the intake channel and causing jellyfish heading toward the intake port to rise by bubbles through the infrasound generation range of the infrasound generator, thereby changing the direction of jellyfish inflow upward; a net installed across the intake channel between the guide walls, inclined from the bottom of one side of the intake channel toward the upper side of the intake channel, and installed obliquely with respect to the flow of seawater when viewed from a plane to attract jellyfish toward the upper side of the intake channel; a reservoir in which jellyfish attracted along the net are collected; a crusher for crushing jellyfish supplied from the reservoir; and from the crusher A jellyfish removal device including a measuring instrument for measuring the amount of jellyfish crushed material supplied; and a control unit for controlling the bubble generator according to the amount of jellyfish crushed material measured by the measuring instrument; wherein the measuring instrument is provided in the form of a mesh-type container for drainage and includes a detection sensor for detecting jellyfish crushed material flowing into the measuring instrument for a certain period of time; the control unit analyzes the amount of jellyfish generated in the sea around the water intake through the amount of jellyfish crushed material measured for the certain period of time, and changes the bubble size and bubble generation speed of the bubble generator according to the analyzed amount of jellyfish generated; and the ultra-low frequency generator, the bubble generator, the jellyfish removal device, and the control unit operate such that the inhibition of jellyfish approach, the surfacing and attraction of jellyfish, the crushing of jellyfish, the measurement of the amount of jellyfish crushed material, and the control unit control of the bubble generator proceed simultaneously. Claim 7 In claim 6, the above-mentioned ultra-low frequency generator is a jellyfish inflow prevention system for a power plant water intake that generates ultra-low frequencies of 8 Hz to 13 Hz. Claim 8 In claim 6, the bubble generating device is installed in multiple locations on the seabed along the water intake channel and operates intermittently or continuously, a jellyfish inflow prevention system for a power plant water intake. Claim 9 In claim 6, the above measuring instrument measures the amount of pure jellyfish crushed material by draining through the above mesh-type container, a jellyfish inflow prevention system for a power plant water intake. Claim 10 In claim 6, the bubble generating device and the net are configured such that a jellyfish located at the bottom of the net is lured along the net to the top of the net along with the bubble, in a jellyfish inflow prevention system for a power plant water intake.

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