JP2001140234A - Marine living things adhesion prevention device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a marine living things adhesion prevention device capable of surely preventing the adhesion of marine living things adhered to the inside of piping conveying sea water by eliminating influences upon environment and ecosystem to the utmost and taking into consideration an operation cost. SOLUTION: For sea water intake piping laid in a facility using sea water, a high pressure carbon monoxide pouring device is placed near to an intake to pour carbon monoxide into sea water intake. A high pressure oxygen pouring device is placed near to a drain outlet to pour saturated carbon monoxide as drainage into the high pressure oxygen pouring device. This device is capable of preventing the influence on the environment, preventing the adherence of marine living things to the inside of sea water piping as well as the growth of them and preventing the inconvenience to a power plane to greatly contribute to stabilized power supply.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for preventing and removing marine organisms adhering to the inner surface of a pipe for transporting seawater, and more particularly to a method for removing marine organisms adhering to a cooling water channel in a power plant. The method relates to a method for suppressing noise.

[0002]

2. Description of the Related Art Seawater is often used as cooling water for heat exchangers used in condensers of power plants. Seawater is obtained from the intake, but in the pipe from the sea to the heat exchanger, marine organisms such as shellfish adhere to the inner wall surface, and then grow to cause an increase in flow resistance in the pipe. In addition, when marine organisms grow on the wall, a thick layer of marine organisms is formed, but this layer is peeled off at one time, blocking the heat exchanger tubes of the heat exchanger, reducing the performance of the condenser, and Causes seawater to leak, causing the power plant to stop.

In order to avoid such a problem, conventionally, a chlorine-based germicide such as chlorine has been injected into the water intake, and a paint containing organotin or the like has been applied to the inner surface of the water pipe.

[0004] As a method for preventing the adhesion of marine organisms,
No. 10999 has proposed a freshwater membrane type antifouling device. Considering the characteristics that marine organisms are unlikely to adhere in freshwater areas, holes are provided in the wall of the pipe that transports seawater, and freshwater such as river water flows out of the hole from outside to form a freshwater film on the inner surface of the pipe. Thus, marine organisms are prevented from attaching and growing.

Further, in the method for controlling aquatic organisms and the method for judging the state of attachment described in Japanese Patent Application Laid-Open No. H11-169057, a method has been proposed in which an intermittent sound of 200 Hz or less is generated in water to inhibit the growth of marine organisms. ing.

Further, in the method and apparatus for measuring and controlling the concentration of chlorine dioxide in seawater disclosed in Japanese Patent Application Laid-Open No. Hei 7-265867, the pH value of intake water is controlled by injecting chlorine dioxide into water to control the marine life. Techniques for preventing the attachment of organisms have been proposed.

[0007]

According to the above-mentioned technique of injecting a chlorine-based disinfectant such as chlorine into the water intake described in the prior art, when the injecting agent is a chlorine-based disinfectant, a carcinogenic substance may be generated. There is a problem that wastewater discharged into the ocean kills a large amount of marine organisms and destroys ecosystem destruction. Also,
The method of applying paint containing organotin etc. to waterway walls also leads to ecosystem destruction such as accumulation of heavy metals in marine organisms, and the use of this method must be avoided when considering the impact on ecosystems .

On the other hand, in the freshwater film type antifouling device disclosed in Japanese Patent Application Laid-Open No. 7-310999, when the flow of the fluid inside the pipe is fast, the freshwater film is not formed stably, and the above effects prevent the adhesion and growth of marine organisms. Is not wanted.

In the method for controlling aquatic organisms and the method for judging the state of adhesion described in Japanese Patent Application Laid-Open No. 11-169057, it is considered that ancillary facilities are large and equipment costs and operation costs are large. Also,
There is a problem that the effect of preventing the attachment of marine organisms is not so much expected as compared with the facility cost and the operation cost.

In the method and apparatus for measuring and controlling the concentration of chlorine dioxide in seawater disclosed in JP-A-7-265867,
Controlling the value alone may not be enough to prevent marine organisms from attaching.

As described above, the problem to be solved by the present invention is to reduce the impact on the environment and ecosystem as much as possible while minimizing the operation cost, and to reduce The purpose is to surely prevent the attachment of marine organisms.

[0012]

Means for Solving the Problems As the marine organism adhesion preventing device for solving the problems of the above-mentioned conventional methods, the present invention includes the following.

Means for solving the above-mentioned problem of the present invention is to provide an apparatus for preventing marine organisms from adhering near a water intake of a seawater intake pipe installed in a facility using seawater. It is to disinfect marine life by injecting carbon monoxide into the seawater with a carbon monoxide injection device. In addition, by disposing a high-pressure oxygen injection device for drainage installed near the drain, the carbon monoxide of the seawater is neutralized.

In order to solve the above-mentioned problem, a means for injecting high-pressure carbon monoxide into seawater in a marine organism adhesion prevention device in order to surely dissolve carbon monoxide into seawater. In addition, one or more water tanks for storing water intake are provided. In addition, in consideration of the environmental impact during the release to the outside world, in order to allow oxygen to sufficiently dissolve into the wastewater, a single unit for storing wastewater in the oxygen injection device into the wastewater in the marine organism attachment prevention device, or It is to arrange a plurality of water tanks.

Means for solving the above-mentioned problem of the third aspect is to ensure the prevention of marine organisms from adhering to the inner surface of the pipe and to minimize the necessary cost. Injection of the optimal amount of carbon monoxide estimated from the relationship between the amount of marine organisms and the amount of carbon monoxide previously obtained from the killing experiment of marine organisms into the seawater from the carbon monoxide injector in the marine organism adhesion prevention device It is to be.

Means for solving the above-mentioned problem is to prevent marine organisms from adhering to the inner surface of the pipe and minimize the necessary cost by conducting experiments on the killing of marine organisms. Injecting carbon monoxide into seawater from a carbon monoxide injector in a marine organism attachment prevention device during an optimum injection time estimated from a relationship between a previously obtained amount of marine organisms and time.

Means for solving the above-mentioned problem is to prevent marine organisms from adhering to the inner surface of the pipe and minimize the necessary cost by conducting experiments on killing marine organisms. By injecting carbon monoxide into seawater from the carbon monoxide injection device in the marine organism adhesion prevention device through the time interval of the optimal injection interval estimated from the relationship between the amount of marine organisms obtained in advance and time, is there.

Means for solving the above-mentioned problem is to prevent carbon monoxide from adhering to the inner surface of the pipe and to minimize the necessary cost, so as to minimize the cost. After processing the images taken by the underwater camera and the underwater camera in the water tank for storing the seawater of the injection device, the image processing computer and the image processing computer with the counting function to automatically count the number of marine organisms The number of marine organisms counted is compared with the threshold value of the marine organisms, and a computer for issuing an opening / closing instruction to an actuator connected to the valve, and a seawater storage tank comprising the actuator and the valve.

In order to solve the above-mentioned problem, the present invention is characterized in that oxygen is injected into a saturated aqueous solution of carbon monoxide in order to neutralize seawater, which is an aqueous solution of saturated carbon monoxide discharged to the outside world, at the time of drainage. From the experiment, the amount of carbon monoxide obtained in advance,
And injecting the optimum oxygen injection amount estimated from the relationship between the pH and the oxygen injection amount into the wastewater from the oxygen injection device in the marine organism attachment prevention device.

[0020]

Embodiments of the present invention will be described below.

First Embodiment FIG. 1 shows the configuration of a marine organism adhesion preventing apparatus 1 according to a first embodiment of the present invention. The marine organism attachment prevention device 1 according to the present invention is a main waterway 1 connecting an intake 15 and a drain 16.
Branching from 4a, it is installed in a branch waterway 14b connected to equipment 13 such as a power plant that uses intake seawater as cooling water. The intake water 18 drawn from the ocean by a pump or the like attached to the facility 13 flows into a branch waterway 14b that branches off the main waterway 14a. A high-pressure carbon monoxide injector 11 is additionally provided at the entrance of the branch waterway 14b. The high-pressure carbon monoxide 21 is injected from the high-pressure carbon monoxide injector 11 into the seawater 18 that has flowed into the branch waterway 14a. FIG. 2 shows a state in which high-pressure carbon monoxide 21 is injected into seawater 18. The carbon monoxide 21 is injected into the seawater 18 at high pressure. At this time, the carbon monoxide 21 is in the form of fine bubbles and relatively easily dissolves in the seawater 18. In the intake seawater 18 in which the carbon monoxide 21 is dissolved in a certain amount and becomes saturated, the marine creatures become choked and cannot survive. That is, in the branch waterway piping system 14b after the carbon monoxide is injected, marine organisms such as young shellfish do not adhere to the inner wall surface of the piping. When carbon monoxide is injected, as shown in FIG. 2, it is desirable to measure the concentration of carbon monoxide downstream. The seawater 18 into which carbon monoxide has been injected is transferred into the facility 13 and flows into equipment that uses seawater as cooling water, such as a heat exchanger in the facility 13. After that, this seawater is discharged as effluent 19 to the ocean 17, but if the seawater 18 with carbon monoxide injected is discharged as the effluent 19, the concentration of carbon monoxide is higher than that of normal seawater. There is a possibility that marine organisms living in the ocean 17 near the drain 16 may be killed. Therefore, the marine organism adhesion prevention device 1 of the present invention
Then, the high-pressure oxygen injection device 11 is disposed at a position where the seawater 18 used as the cooling water is discharged from the facility. As in the method for injecting carbon monoxide shown in FIG. At this time, oxygen is in the form of fine bubbles, and oxygen is relatively easily dissolved into the wastewater 19 having a high carbon monoxide concentration. At this time, the wastewater 19 having a high carbon monoxide concentration is neutralized by oxygen, and does not affect marine organisms even when discharged into the ocean 17. That is, the amount of oxygen to be injected at this time is such that the amount of oxygen in the wastewater 19 having a high concentration of carbon monoxide, the amount of oxygen in the
It is necessary to inject to a level equivalent to pH etc.

The amount of carbon monoxide at the time of carbon monoxide injection described above is optimally determined from the relationship 31 between the residual rate of marine organisms and the carbon monoxide injection amount obtained from a marine life killing test conducted in advance. Injection amount. Relationship between survival rate of marine organisms obtained from marine life killing tests and optimal carbon monoxide concentration 3
1 is shown in FIG. The marine life killing test for obtaining the relationship 31 between the marine life remaining rate and the optimum carbon monoxide concentration is performed in the following manner. In a tank filled with the same aqueous solution as the seawater,
For example, after a target marine creature such as a mussel is bred on the wall surface of a water tank, predetermined carbon monoxide is injected into the water tank. After measuring the number or mass of marine organisms attached to the aquarium wall before the start of the test, a predetermined amount of carbon monoxide is injected. After the injection, the number or mass of marine organisms adhering to the wall surface of the aquarium after a predetermined elapsed time is measured to calculate the marine organism survival rate. The marine organism survival rate is determined by the following equation.

Marine organism survival rate = (number or mass of marine organisms after a certain period of carbon monoxide injection) / (number or mass of marine organisms before test) Compare the relationship 31 between the marine life survival rate and the carbon monoxide injection amount obtained from the marine life killing test changed in several cases and the preset threshold value of the marine life survival rate. As shown in FIG. 3, the optimum carbon monoxide injection amount is determined. The optimum injection amount of carbon monoxide determined in this manner is defined as the injection amount of carbon monoxide in the marine organism adhesion preventing device 1.

Further, a method for setting the injection time and the injection interval of carbon monoxide in the marine organism adhesion preventing apparatus 1 will be described below. FIG. 4 shows the relationship 32 between the marine organism survival rate and the time obtained from the marine organism killing test described above. The marine life killing test for obtaining the relationship 32 between the marine life remaining rate and time as shown in FIG. 4 is performed as follows. Similar to the marine life killing test for obtaining the relationship 31 between the residual ratio of marine life and the optimum carbon monoxide concentration, the water adhering to the water tank wall of the water tank filled with the same aqueous solution as the intake seawater 18 before the test was started. After measuring the number or mass of the marine organisms, the optimum injection amount of carbon monoxide determined above is injected into the water tank. After injection, the number or mass of marine organisms adhering to the tank wall is periodically measured to calculate the marine organism survival rate.

The concentration of carbon monoxide gradually decreases, and the survival rate of marine organisms increases with time (A in FIG. 4).
point). Here, when the marine organism survival rate exceeds a certain threshold value, the optimum injection amount of carbon monoxide is injected again into the test tank. Even when carbon monoxide is injected, the residual rate of marine organisms is measured intermittently, and the injection of carbon monoxide is stopped when the residual rate of marine organisms becomes sufficiently small. By repeatedly injecting and stopping the injection of carbon monoxide, the relationship 32 between the survival rate of marine organisms and time shown in FIG. 4 can be obtained. Originally, from the viewpoint of prevention of marine organism adhesion, it is desirable that the injection of carbon monoxide in the marine organism adhesion prevention device 1 be continuous, but in this case, the amount of carbon monoxide to be injected into the intake seawater 18. Is enormous and economics are impaired. Therefore, by setting the carbon monoxide injection time and the injection interval determined by the above-described method to the carbon monoxide injection time and the injection interval in the marine organism adhesion prevention device 1, the marine organism adhesion prevention at the beginning is prevented. Marine organism adhesion prevention device 1 that can reduce the cost of carbon monoxide not only for the purpose of
It is possible.

On the other hand, the amount of oxygen to the drainage water 19 is also estimated from the amount of carbon monoxide obtained by an oxygen injection test for injecting oxygen into a saturated aqueous solution of carbon monoxide, and the relationship 33 between pH and the amount of oxygen injected. The optimum oxygen injection amount is used. FIG. 5 shows the relationship between the amount of carbon monoxide and the pH and the amount of injected oxygen. Equipment 1
A predetermined amount of oxygen is injected into a saturated aqueous solution having the same level of carbon monoxide as the waste water 19 discharged from 3.
At this time, after measuring the amount of carbon monoxide, and pH, changing the amount of oxygen to be injected, the amount of carbon monoxide again, and
Measure pH, etc. By changing the amount of oxygen injected into the saturated aqueous solution of carbon monoxide in this manner, the amount of carbon monoxide and the optimum amount of oxygen injected estimated from the relationship 33 between the pH and the amount of oxygen injected shown in FIG. 5 can be obtained. . Carbon monoxide content,
The oxygen injection amount at the time when the pH reaches the seawater level is determined as the optimum oxygen injection amount, which is the oxygen injection amount into the wastewater.

Second Embodiment FIG. 6 shows a configuration diagram of a marine organism adhesion preventing device 2 according to a second embodiment of the present invention. The feature of the second embodiment shown in FIG. 6 is that the high-pressure carbon monoxide injector 41 and the high-pressure oxygen injector 42 are different from those of the first embodiment shown in FIG. In the case of the first embodiment, the carbon monoxide injected by the high-pressure carbon monoxide injector 11 was directly injected into the branch water channel 14b branched from the main water channel 14a. Since carbon monoxide 21 is injected at a high pressure, dissolution of carbon monoxide into the intake seawater 18 is expected. However, since the intake seawater 18 moves at a certain fluid velocity, the intake seawater 18 It is also suggested that the penetration of carbon monoxide may not be sufficient. In the second embodiment, the branch water channel 14b and the high-pressure carbon monoxide injection device 41
Are connected to each other. Branch waterway 14
The water storage tank 43 is filled with the seawater 18 because the seawater 18 from b flows into the water storage tank 43. Also,
Since there is almost no flow in the water storage tank 43, if the high-pressure carbon monoxide 21 is injected into the water storage tank 43, the carbon monoxide sufficiently dissolves in the seawater 18 and the seawater 18 is saturated with the carbon monoxide water. become. The size of the water storage tank 43 must be increased to such an extent that the speed of the intake water 18 in the water storage tank 43 becomes sufficiently slow in consideration of the pipe diameter of the branch channel 14b, the flow rate of the intake water 18, and the like.

Further, a similar technique may be adopted in the high-pressure oxygen injection device 42 before using the intake seawater 18 as cooling water for equipment such as a heat exchanger in the facility 13 and discharging it to the ocean 17 as wastewater. desirable. Since the intake seawater 18 into which carbon monoxide has been injected by the above-described method is saturated carbon monoxide water, when discharging it to the ocean 17 as the wastewater 19, the wastewater 18 can be sufficiently injected by injecting oxygen. It must be neutralized and released. Therefore, in the marine organism attachment prevention device 2 according to the second embodiment, the intake seawater branch channel 14b transferred from the facility 13 and the high-pressure oxygen injection device 42
Is provided. Like the water storage tank 43 connected to the high-pressure carbon monoxide injection device 41, the water storage tank 44 connected to the high-pressure oxygen injection device 42 has the same size as the pipe diameter of the branch water passage 14b and the seawater 18
In consideration of the flow rate and the like, it is necessary to increase the speed of the drainage 19 in the water storage tank until it becomes sufficiently slow. In the water storage tank 44, since the fluid velocity of the waste water 19 is almost nil, if high-pressure oxygen is injected into the water storage tank 44, the oxygen is sufficiently dissolved in the seawater, and the waste water 19 having a high oxygen monoxide concentration can be easily discharged from the ocean. It is considered that the level becomes equivalent to the oxygen amount, pH and the like at 18.

In the case of the marine organism adhesion preventing device 2 shown in FIG. 6, the water storage tank 43 connected to the high pressure carbon monoxide injection device 41 and the water storage tank 44 connected to the high pressure oxygen injection device 42 However, by providing a plurality of water storage tanks, it is possible to more reliably take carbon monoxide and sufficiently dissolve seawater 18 or oxygen into wastewater 19.

FIG. 7 shows an example in which a plurality of water storage tanks 44 connected to the high-pressure oxygen injection device 42 are provided.

By providing a plurality of water storage tanks 44 as shown in FIG. 7, the region where there is almost no fluid velocity increases, and the supply of oxygen to the wastewater becomes easier. In addition, when discharging the wastewater into which oxygen is sufficiently injected from the sea, use an oxygen concentration meter 45.
Thus, it is confirmed that the oxygen level of the seawater in the predetermined ocean 17 is at the same level.

The injection amount, injection time, injection interval, etc. of the high-pressure carbon monoxide in the second embodiment shown in FIG. 5 are determined by the marine life killing test shown in the first embodiment. . Further, the oxygen injection amount in the second embodiment is determined by the optimum oxygen injection amount obtained in the oxygen injection test shown in the first embodiment.

Third Embodiment A carbon monoxide injector 3 according to a third embodiment of the present invention.
8 is shown in FIG. The third embodiment is an example of the high-pressure carbon monoxide injection device 41 in the marine organism attachment prevention device 2. In the high-pressure carbon monoxide injectors 11 and 41 in the marine organism adhesion preventing devices 1 and 2 of the first embodiment and the second embodiment, the marine organism killing test in which the amount of injected carbon monoxide was performed in advance. Was determined from the relationship 31 between the residual rate of marine organisms obtained from and the carbon monoxide concentration. Further, the injection time and the injection interval of carbon monoxide were also determined from the relationship 32 between the survival rate of marine organisms and the time obtained from the marine life killing test conducted in advance. However, these carbon monoxide injections,
Since the carbon monoxide injection time and the injection interval were determined from the marine organism killing test conducted at the laboratory level, the actual marine organism adhesion prevention devices 1 and 2 ensure the marine organism adhesion prevention effect. In the third embodiment, a carbon monoxide injection device 3 to which a technique based on online monitoring is introduced is shown.

The carbon monoxide injection device 41 using online monitoring shown in FIG. 8 captures an image taken by the underwater camera 51 and the underwater camera 51 for photographing the inner wall surface of the water storage tank 43 for injecting carbon monoxide. The computer 52 counts the number of marine creatures 61 such as young shellfish attached to the inner wall surface of the water storage tank 43 connected to the carbon monoxide injection tank, and the inner wall surface of the counted water storage tank 43 is processed. A valve installed between a pipe connecting the carbon monoxide injection tank 11 and the water storage tank 43 based on a result of comparing the number of the attached marine organisms 61 with a preset threshold value. A computer system 53 for transmitting an opening / closing instruction to an actuator 54 connected to an actuator 55; an actuator 54 connected to a valve;
It consists of a cable 56 for exchanging data between instruments.

Underwater camera 51 for monitoring the inner surface of the water tank
Monitors the state of attachment of marine organisms to the inner surface of the water tank 43. The video captured by the underwater camera 51 is transferred to the image processing computer 52 connected to the underwater camera 51 as needed. The image processing computer 52 that has received the image of the underwater camera 51 clarifies the image 61 of the marine creature in the image captured by the underwater camera 51 by an image processing method such as binarization processing on the image. Then, the number of marine organisms 61 attached to the inner surface of the water tank is counted. The counted number of marine organisms 61 attached to the inner surface of the water storage tank 43 is transmitted to the actuator 54 connected to the valve 55 installed between the carbon monoxide injection tank 11 and the pipe connecting the water storage tank 43 to open and close. Is transmitted as data to the computer system 53. By comparing the counted number of marine organisms 61 attached to the inner surface of the water tank 43 with a preset threshold value, the number of marine organisms attached to the inner surface of the water tank 43 is smaller than the threshold value. If it is large, that is, if it is determined that the marine organisms are breeding on the inner surface of the water tank, the computer system 53 that transmits the opening / closing instruction to the actuator 54 issues an instruction to the actuator 54 to open the valve 55. Valve 55
Upon receiving the instruction to open, the actuator 54 opens the valve 55 installed between the pipe connecting the carbon monoxide injection tank 11 and the water tank 43, and injects carbon monoxide into the water tank 43.
When carbon monoxide is sufficiently infused, marine organisms die due to oxygen starvation by saturated carbon monoxide and the toxicity of carbon monoxide. In addition, when the number of the marine creatures 61 counted by the above-described image processing is smaller than the threshold, that is,
When it is determined that the marine creature has not propagated on the inner surface of the water storage tank 42, the computer system 53 that transmits the opening / closing instruction to the actuator 54 issues an instruction to the actuator 54 to close the valve 55.

By using the carbon monoxide injector 3 incorporating the above-described online monitoring method,
It is possible to ensure the effect of preventing marine organism adhesion in the marine organism adhesion prevention device 2 in which the amount of carbon monoxide injected into the intake seawater 18 is optimized.

[0037]

According to the present invention, by injecting carbon monoxide into seawater, it is possible to prevent the marine organisms from adhering and growing in the seawater pipes, and to block the pipes due to the propagation of marine organisms. It is possible to avoid problems of the power plant such as the above. In addition, at the time of drainage of intake seawater, oxygen is injected to neutralize intake water that has become saturated carbon monoxide water by injection of carbon monoxide, thereby preventing the occurrence of environmental pollution due to drainage. is there. In addition, since this equipment can cope with the existing system simply by adding a carbon monoxide injection system and an oxygen injection system, it is possible to reduce the cost of additional equipment.

[0038] Further, since it is possible to avoid problems of the power plant due to clogging of the pipes, etc., it is possible to reduce and optimize maintenance costs and inspection costs, to enhance safety and greatly contribute to stable power supply. it can.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a marine organism adhesion preventing device according to a first embodiment of the present invention.

FIG. 2 is a diagram showing an example of injecting high-pressure carbon monoxide gas into seawater.

FIG. 3 is a diagram showing an example of the relationship between the amount of marine organisms and the concentration of carbon monoxide obtained from a marine organism killing experiment.

FIG. 4 is a diagram showing an example of the relationship between the amount of marine organisms and time obtained from an experiment on killing marine organisms.

FIG. 5 is a graph showing a relationship between a carbon monoxide concentration or a pH value and an oxygen injection amount.

FIG. 6 is a configuration diagram of a marine organism adhesion preventing device according to a second embodiment of the present invention.

FIG. 7 is a diagram showing an example in which a plurality of water tanks are used for oxygen injection during drainage.

FIG. 8 is a diagram showing an example of a carbon monoxide injection device by online monitoring.

[Explanation of symbols]

11 high-pressure carbon monoxide injection device, 12 high-pressure oxygen injection device, 13 equipment having equipment for using seawater as cooling water, 14a main water channel, 14b branch water channel, 15 water intake port, 16 water outlet port, 17 ... sea, 18 ... seawater, 19 ... drainage, 21 ... carbon monoxide on air bubbles, 22 ... carbon monoxide concentration meter, 31 ... relationship between the residual rate of marine organisms and the amount of injected carbon monoxide, 32 ... marine Relationship between the survival rate of living organisms and time, 41: high-pressure carbon monoxide injector with water tank, 42: high-pressure oxygen injector with water tank, 43: high-pressure carbon monoxide tank, 44: high-pressure oxygen tank Tank, 45: oxygen concentration meter, 51: underwater camera, 52: computer for image processing, 53
... Valve opening / closing instruction calculator, 54 ... Valve opening / closing actuator, 55 ... Valve, 56 ... Data transfer cable.

Continuation of the front page (72) Inventor Shinichi Hisatsune 3-1-1 Kochi-cho, Hitachi-shi, Ibaraki F-term in the Nuclear Power Division of Hitachi, Ltd. 3B117 AA06 BA51

Claims (7)

[Claims] Claims: 1. A pipe for taking in seawater installed in a facility using seawater, comprising: a device for injecting high-pressure carbon monoxide installed near an intake into seawater; and a high-pressure oxygen installed near a drainage outlet. An apparatus for preventing marine organisms from adhering, comprising a device for injecting wastewater. 2. The marine organism according to claim 1, wherein the high-pressure carbon monoxide injection apparatus for injecting seawater in the marine organism adhesion preventing apparatus according to claim 1 includes one or more water storage tanks for temporarily storing intake water. What is claimed is: 1. An apparatus for preventing marine organisms from adhering, comprising a single or a plurality of water tanks for temporarily storing wastewater, in a device for injecting high-pressure oxygen into wastewater in an organism's attachment prevention device. 3. The marine organism according to claim 1, wherein the optimum amount of injected carbon monoxide estimated from the relationship between the residual rate of the amount of marine organisms and the amount of injected carbon monoxide obtained from a marine life killing experiment is determined. A marine organism attachment prevention device characterized by injecting seawater from a high-pressure carbon monoxide injection device in the organism attachment prevention device. 4. The high pressure monoxide in the marine organism adhesion preventing apparatus according to claim 1, during an optimum injection time estimated from a relationship between the amount of marine organisms and time obtained in advance from a marine organism killing experiment. A marine organism attachment prevention device characterized by injecting carbon monoxide from a carbon injection device into seawater. 5. The marine organism adhesion preventing device according to claim 1, wherein after the marine life killing experiment, a time interval of an optimum injection interval estimated from a relationship between a previously obtained amount of marine organisms and time is obtained. A marine organism adhesion prevention device characterized by injecting carbon monoxide from a high-pressure carbon monoxide injection device into seawater. 6. An image taken by an underwater camera and an underwater camera in a single or a plurality of storage tanks for storing the intake water of the carbon monoxide injection device into the intake seawater according to claim 2, An image processing computer with a counting function that automatically counts the number of marine organisms, and compares the number of marine organisms counted by the image processing computer with the marine organism threshold and issues an open / close instruction to an actuator that opens and closes a valve. An apparatus for preventing marine organisms from adhering, comprising a seawater storage tank comprising a computer, an actuator for opening and closing a valve, and a valve. 7. An optimum oxygen injection amount estimated from the relationship between pH and oxygen injection amount obtained in advance from an experiment of injecting oxygen into a saturated aqueous solution of carbon monoxide. A marine organism attachment prevention device characterized by injecting wastewater from an oxygen injection device in the marine organism attachment prevention device.