JP4375727B2 - Aquatic organism processing method and apparatus - Google Patents

Description

  The present invention relates to a processing method and a processing apparatus for aquatic organisms such as jellyfish, etc., and jellyfish removed and recovered by a screen of a water intake channel that takes a large amount of seawater as cooling water in a coastal plant, particularly a nuclear power plant or a thermal power plant. The present invention relates to a method and apparatus for treating aquatic organisms for efficiently treating aquatic organisms.

  In nuclear power plants and thermal power plants, seawater is used in large quantities as cooling water, but aquatic organisms such as jellyfish are mixed in this seawater intake channel. If these aquatic organisms are left unattended, the intake channel will be blocked and the cooling water intake will be reduced, leading to a decrease in the cooling efficiency of the plant. Furthermore, in order to cause failure of plant equipment and decrease in operating rate, eventually leading to shutdown of the power plant, etc., causing various harmful effects, a screen is installed at the water intake to capture and eliminate aquatic organisms such as jellyfish. is doing. Normally, jellyfish and the like captured on the screen are discharged when they reach a certain load (a certain amount). At this time, since the jellyfish removed from the screen is separated from the seawater, it is stored in a temporary pit, and then subjected to processing such as decomposition and prevention of rot odor.

  Patent Document 1 proposes a treatment method in which aquatic organisms such as jellyfish separated from seawater are stored in an air-tight airtight tank for several days to liquefy the jellyfish. It is unrealistic in terms of equipment and operation to store organisms in a sealed tank for several days in a state of being shielded from air. Therefore, normally, without adopting such a large air blocking structure or the like, aquatic organisms such as jellyfish separated from seawater are transferred to the primary storage tank of the processing system and then processed by physicochemical processing means. .

  However, conventionally, when aquatic organisms are transferred from the pit to the primary storage tank of the above processing system, manual work has been mainly performed. For this reason, when a large amount of jellyfish is generated, the jellyfish must be transferred day and night, and the work becomes complicated and the work load becomes large. Also, landed aquatic organisms such as jellyfish began to rot as soon as they were left unattended, generating odorous substances such as hydrogen sulfide, which caused problems such as complaints from the local residents.

In order to prevent the generation of a rotting odor, various techniques for adding a rotting odor prevention agent have been proposed. For example, in the physicochemical treatment means in Patent Document 2 which is the previous proposal by the present applicant, after receiving aquatic organisms such as jellyfish in the primary storage tank of the treatment device, the rot odor can be prevented quickly in order to suppress the rot odor. The drug is injected, but if this drug is insufficient, odor may be generated, and excessive injection will increase the SS load of water after treatment, not only the drug will be wasted, but also the physical chemistry in the latter stage Since it is disadvantageous in the solid-liquid separation step in the processing, it is desired to always maintain an accurate injection amount. However, since these anti-corrosive odor prevention agents have been manually put in buckets or infused with a pump, it is difficult to administer the optimum infusion amount corresponding to the amount of aquatic organisms such as jellyfish. there were.
JP 2003-225639 A Japanese Patent Application No. 2002-311530

  The object of the present invention is to pay attention to the above-mentioned conventional problems, make it possible to easily automate the reception of aquatic organisms such as jellyfish from the pit to the primary storage tank of the processing apparatus, and substantially always transfer It is possible to significantly reduce the labor required for work and to increase the processing speed to appropriately prevent the occurrence of rot odor.

  In addition, an object of the present invention is to enable an appropriate amount of an anti-corrosion odor preventive drug to be automatically injected according to the amount of aquatic organisms such as jellyfish that have been landed. It is an object of the present invention to provide an aquatic organism treatment method and apparatus capable of preventing deficiency and reliably suppressing the odor of aquatic organisms.

In order to solve the above-mentioned problem, the aquatic organism processing method according to the present invention stores the aquatic organisms landed by vacuum suction in a suction tank, and the storage amount of the aquatic organisms is set to a predetermined amount. The aquatic organism is dropped into a transfer chamber provided below the suction tank by opening an open / close door provided in the suction tank when reaching, and the aquatic organism is transferred from the transfer chamber through a transfer pipe. Is transferred to the primary storage tank of the treatment system, the amount of anti-corrosion odor preventive agent corresponding to the transfer amount measured as a value calculated by the product of the number of times the opening and closing door is opened and the predetermined amount is injected. It consists of the method. That is, the antiseptic odor preventive agent is injected in an optimum amount corresponding to the amount transferred to the primary storage tank.

In this method, the transfer amount is weighed, rancidity prevention agent in an amount corresponding to the metered transfer amount is injected. By weighing, it becomes possible to easily obtain an optimal anti-corrosive odor agent, and the injection amount can be easily controlled and automatic injection can be easily performed .

Further, since a vacuum suction means as a transfer means to the primary reservoir of landed by aquatic organisms, it can be very easily transported directly from the pit or the like to the primary reservoir aquatic organisms isolated from seawater. As a result, the transfer operation can be automated more easily, and the medicine injection operation corresponding to the transfer amount can be automated more easily.

The aquatic organism processing apparatus according to the present invention includes a suction tank that stores aquatic organisms that are landed by vacuum suction, a transfer chamber provided below the suction tank, and the transfer chamber and the suction tank. A treatment device comprising an open / close door that opens when the amount of aquatic organisms stored reaches a predetermined amount, and a primary storage tank in which the aquatic organisms are transferred from the transfer chamber via a transfer pipe. Injecting an anti-septic odor agent in an amount corresponding to the amount of aquatic organisms transferred to the primary storage tank, which is measured as a value calculated by multiplying the number of times the open / close door is opened and the constant amount It has the means to do.

As the processing apparatus, the aquatic life once entrapment in the suction tank, using means for transporting the primary reservoir automatically for each fixed quantity, easily, the optimum amount of rancidity prevention agent according to the amount of the transfer It becomes possible to inject by automatic control.

  According to the method and apparatus for treating aquatic organisms of the present invention, since the spoilage odor preventing agent is injected in an appropriate amount corresponding to the amount of aquatic organisms transferred to the primary storage tank, the injection amount is excessive or insufficient. And the odor of aquatic organisms can be reliably suppressed. In addition, since the chemical injection is performed according to the operation of transferring the aquatic organisms to the primary storage tank, it becomes possible to prevent the rot odor quickly and accurately, that is, at the optimum earliest timing. In other words, the aquatic organism transfer operation and the rotting odor prevention agent injection operation are executed in an interlocked state with each other so as to achieve optimum conditions. As a result, both operations are performed in the most efficient and effective state. In particular, both operations can be easily automated under optimal conditions linked to each other, and automation enables a significant reduction in manpower required for conventional transfer work, as well as rapid processing, It is possible to more reliably prevent the generation of a rotting odor by injecting an optimal amount of drug.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows an aquatic organism processing apparatus according to an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a part according to the present invention of a processing apparatus for aquatic organisms. An object to be processed from the processing apparatus part 1 is a subsequent processing step 2 including a coagulation process, a solid-liquid separation process and the like. Sent to. Aquatic organisms 3 such as jellyfish captured by a screen (not shown) in a seawater intake channel are stored, for example, in a pit 4 having an inclined bottom surface and separated from seawater 5. In this embodiment, the aquatic organism 3 separated from the seawater 5 is sucked from the pit 4 by the vacuum suction device 6 as a vacuum suction means and transferred to the primary storage tank 7 of the processing system. The vacuum suction device 6 temporarily stores the aquatic organism 3 sucked through the suction pipe 8 in the suction tank 9, and the storage amount (reserved weight) in the suction tank 9 is set to a predetermined constant amount (constant weight). When it reaches, the opening / closing door 10 is automatically opened, and the aquatic organism 3 in the suction tank 9 is dropped into the transfer chamber 11 below. The aquatic organism 3 dropped into the transfer chamber 11 is transferred to the primary storage tank 7 via the transfer pipe 12 through a pump (not shown) or by natural fall using gravity.

With the transfer of such aquatic organisms 3, the dosing device 13, rancidity prevention agents 14 of optimum amount corresponding to the transfer amount of aquatic organisms 3 is injected. In this embodiment, the rotten odor preventing chemical 14 is stored in the chemical tank 15 and is then injected into the primary storage tank 7 through the suction pipe 16, the chemical injection pump 17, and the injection pipe 18. and that it can also be injected into any of the sites of the transfer tube 12 or the transfer line of aquatic organisms 3. As the rotten odor preventing chemical 14, for example, ferric chloride, ferric sulfate, sodium aluminate and the like can be used.

  The suction tank 9 in the vacuum suction device 6 opens and closes a door 10 when a certain amount (a constant weight) of the aquatic organism 3 is stored therein, and the aquatic organism 3 is transferred to the primary storage tank 7 through the transfer chamber 11. Since it is designed to be transferred, the vacuum suction device 6 substantially also serves as a means for measuring the transferred amount of the aquatic organism 3. The transfer amount of the aquatic organism 3 transferred at every fixed amount is measured by the control device 19 as a value calculated by, for example, the number of times the opening / closing door 10 is opened × the storage amount of the suction tank 9 set in advance. In response to a control signal sent from 19 through a control line 20, the medicine injection pump 17 is activated. Therefore, an optimal amount of the rotting odor preventing chemical 14 corresponding to the amount of the aquatic organism 3 actually transferred is automatically injected into the primary storage tank 7.

  In the aquatic organism processing apparatus 1 configured as described above, the aquatic organism 3 separated from the seawater 5 in the pit 4 is automatically and substantially always primary storage tank via the vacuum suction device 6. Therefore, regardless of the amount of aquatic organisms 3 captured, the labor required for the conventional transfer work is greatly reduced, and it is possible to make it unmanned. Be improved.

  In addition, the amount of the aquatic organism 3 transferred without excess or deficiency is controlled in conjunction with the vacuum suction device 6 that also has a measuring function at the same time as the transfer to the primary storage tank 7 and the injection amount of the rotting odor preventing chemical 14 to be added is controlled. The optimal amount of anti-corrosion odor 14 corresponding to the above can be quickly injected at the optimal timing. As a result, the generation of a rotten odor is reliably prevented, and the rotten odor is prevented under the most efficient conditions without using useless chemicals. Moreover, since the anti-corrosion odor preventive agent 14 that has been manually added can be automatically injected, the injection operation is greatly reduced, and the unmanned operation can be substantially achieved.

It is a schematic block diagram of the aquatic organism processing apparatus which concerns on one embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Aquatic organism processing apparatus 2 Subsequent processing process 3 Aquatic organism 4 Pit 5 Seawater 6 Vacuum suction apparatus 7 Primary storage tank 8 Suction pipe 9 Suction tank 10 Opening / closing door 11 Transfer chamber 12 Transfer pipe 13 Chemical injection apparatus 14 Antiseptic odor agent DESCRIPTION OF SYMBOLS 15 Drug tank 16 Suction pipe 17 Chemical injection pump 18 Injection pipe 19 Control apparatus 20 Control line

Claims (2)

The aquatic organisms landed are vacuum-sucked and stored in a suction tank, and when the storage amount of the aquatic organisms reaches a predetermined amount, the open / close door provided in the suction tank is opened, aquatic organisms is dropped into the transfer chamber provided below the suction tank, when transferring the primary reservoir of the processing system the aquatic organisms through the transfer tube from the transfer chamber, and the open times of the door A method for treating aquatic organisms, comprising injecting an amount of a rotting odor prevention agent corresponding to a transfer amount measured as a value calculated by the product of the predetermined amount . The amount of aquatic organisms stored in advance is set by separating a suction tank in which landed aquatic organisms are vacuum-sucked and stored, a transfer chamber provided below the suction tank, and the transfer chamber and the suction tank. a door that opens when it reaches a predetermined amount, a processing apparatus having a primary storage tank in which the aquatic organisms are transported through the transfer tube from the transfer chamber, the constant open times of the door An apparatus for treating aquatic organisms, comprising means for injecting an amount of an anti-septic odor agent corresponding to the transfer amount of the aquatic organisms measured as a value calculated as a product of quantities .

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