JPH053769A - Method of dehydrating jellyfish and device therefor - Google Patents

Abstract

PURPOSE:To reduce volume of jellyfishes and to improve efficiency of waste treatment by dehydrating jellyfish in a short time. CONSTITUTION:Live jellyfishes are chopped into cut pieces by a jellyfish feed pump 2 with a cutter 1, sent to a treating tank 5, the jellyfish pieces immersed in clear water in the treating tank 5 for a given time, dehydrated by osmotic pressure and heat of the clear water, homogenized, the dehydrated jellyfish residue is taken out and separated from clear warm water by a net conveyor 19 of a dehydrating device 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention efficiently dehydrates and reduces the volume of jellyfish recovered by a rotary dust remover provided at the intake of a power plant for the purpose of preventing foreign matter from entering the cooling water system. The present invention relates to a method and an apparatus for dehydrating jellyfish for good disposal.

[0002]

2. Description of the Related Art In the latter half of the rainy season, a large number of jellyfish grow in the waters around Japan. Power plants and factories built along the coast draw a large amount of seawater for use as cooling water, but the jellyfish that are generated rush along the tidal current and mix with the cooling water to cool it from the intake. If it is taken into the machine, it will have many negative effects such as reduced thermal efficiency, reduced pump performance, and clogging of filters.For example, at a power plant, a rotary dust remover is used to collect jellyfish that has rushed to the intake. There is.

[0003]

However, the recovered jellyfish is 7 to 8 tons / hour, and the recovered jellyfish is once stored in the reservoir, and is occasionally transported to the landfill treatment pond by a truck for disposal. However, if the transfer was not made in time, the amount of water intake was reduced to reduce the power generation capacity. In this way, the jellyfish collected are tens of tons / day, which requires a great deal of labor and equipment such as securing a reservoir and a truck for transporting it, securing a landfill, and maintaining environmental hygiene.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and provide a method and an apparatus for dehydrating jellyfish which can dehydrate and reduce the volume of jellyfish in a short time and efficiently dispose of the jellyfish.

[0005]

In order to solve the above problems, the method for dehydrating a jellyfish of the present invention is to cut a living jellyfish into pieces, and then dip the jellyfish pieces in warm water for a predetermined time for dehydration. The jellyfish residue after muscularization and dehydration is separated from the warm water.

Further, the jellyfish dehydration treatment device has a cutting device for cutting the living jellyfish into pieces, a fresh water heating device and a fresh water agitating device, and the jellyfish pieces cut by the cutting device are predetermined in warm water. It is provided with a treatment tank which is soaked for a period of time and a moisture removing device which separates moisture from the jellyfish residue treated in this treatment tank.

[0007]

According to the above construction, the biological jellyfish is cut into pieces so that water in the body can be dehydrated quickly, and the jellyfish pieces are immersed in warm water, for example, clear water heated to 85 ° C or higher. As a result, the epidermal tissue of the jellyfish can be destroyed by the osmotic pressure and heat of fresh water, the water contained in the living body can be drained and separated in a relatively short time, and further contracted to a relatively stiff muscle. Therefore, by removing this jellyfish residue from the warm water and removing the water, the volume can be significantly reduced compared to the case where the living jellyfish is disposed of as it is, and most of the water in the body is dehydrated to reduce the weight. After that, the subsequent disposal process such as handling, transportation, and landfill can be performed very easily.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a jellyfish dehydration treatment apparatus according to the present invention will be described below with reference to the drawings.

According to a basic experiment, a jellyfish piece obtained by cutting a living jellyfish into a piece shape is more effectively destroyed especially by the osmotic pressure and heat of the fresh water in the fresh water at 85 ° C. or more, so that the in-vivo tissue can be destroyed in a short time. It is known that the water in the water is separated and dehydrated and contracts, and becomes a relatively stiff muscle.

This dewatering device for jellyfish was made by paying attention to this result, and as shown in FIG. 1, a jellyfish supply pump 2 with a cutter 1 for cutting a living jellyfish into pieces. The reservoir tank 3, a drainer device 4 for draining the jellyfish pieces sent from the jellyfish reservoir tank 3 via the jellyfish supply pump 2, and the jellyfish pieces fed in via the drainer device 4 are predetermined in warm water. It is composed of a treatment tank 5 that is soaked in time to dehydrate muscles, and a moisture removing device 7 that separates moisture from jellyfish residue sent from the treatment tank 5 via a circulation pump 6.

The jellyfish reservoir tank 3 stores living jellyfish collected in a collection tray 11 from a sea surface near the intake port or in the sea by a dust remover together with seawater. The jellyfish reservoir tank 3 contains a living jellyfish treatment tank 4 A feed pump 2 for delivering to This supply pump 2 is also used as a cutting device in which the cutter 1 is attached to the impeller and cuts the living jellyfish into pieces, and the living jellyfish is cut into pieces that are easily dehydrated and treated with seawater through the jellyfish supply pipe 12. It can be sent to the tank 4 side.

The draining device 4 is arranged above the processing tank 5, and a plurality of cylindrical draining rails 14 are inclined toward the outlet side at regular intervals in a draining case 13 whose upper surface is connected to a jellyfish supply pipe 12. The jellyfish pieces and seawater that are placed on the draining rail 14 from the jellyfish supply pipe 12 are
Seawater is dropped from between the draining rails 14 and discharged into the sea through a drainage pipe 15 connected to the bottom of the draining case 13, and the jellyfish pieces are guided by the draining rails 14 and introduced into the processing tank 5 through an outlet. .

The treatment tank 5 is a fresh water heating apparatus 1 capable of maintaining the temperature of the fresh water in the most efficient range of 85 ° C. to 90 ° C. even if the temperature of the fresh water is raised and a predetermined amount of jellyfish pieces are put therein.
6 and a motor 17a provided above the processing tank 5
A fresh water stirrer 17 for rotating the impeller 17b is arranged. The fresh water stirrer 17 stirs the fresh water in the treatment tank 5 to make the temperature uniform, and promotes convection of jellyfish pieces to accelerate dehydration. be able to.

In the water removing device 7, a net conveyor 19 driven by a motor 18b is provided in a casing 18 arranged above the processing tank 5, and a circulation pump 6 is provided.
The jellyfish residue sent from the bottom of the treatment tank 5 through the jellyfish discharge pipe 20 into the discharge box 18a at one end of the casing 18 together with fresh water (actually a mixture of fresh water and jellyfish dehydrated liquid) is transferred to the net conveyor. 19 net 19a
It is configured to be placed on the top of the casing 19 and dehydrated while being conveyed to the outlet 21 on the other end side of the casing 19. 22 is a net 19a from the back side of the net 19a near the outlet 21.
This is an air nozzle that injects compressed air toward the surface, by which the jellyfish residue adhering to the net 19a can be blown off to the outlet 21 side. The fresh water that has passed through the net 19a and dropped is collected by the fresh water tray 23 and returned to the processing tank 5. Since the amount of fresh water in the treatment tank 5 increases by the amount of water dehydrated from the jellyfish living body, the overflow pipe 24 is replaced with fresh water.
It is configured to be discharged to the outside to maintain a constant amount of fresh water.

Next, a method for dehydrating jellyfish having the above structure will be described. The jellyfish living body is put into the jellyfish reservoir tank 3 from the jellyfish collection tray 11 together with seawater. The thrown-in jellyfish is cut into pieces by a jellyfish feed pump 2 with a cutter 1 and sent to a drainer 4 through a jellyfish feed pipe 12.

The seawater drained by the water draining device 4 is discharged to the sea through the drainage pipe 15, and the jellyfish pieces are put into the processing tank 5. In the treatment tank 5, the temperature of the fresh water is maintained at 85 ° C. to 90 ° C. by the fresh water heating device 16,
The jellyfish pieces put into this warm water are the fresh water stirring device 1
After being stirred by 7, the synergistic effect of the osmotic pressure of fresh water and the heat causes a dehydration state within a short time, and the jellyfish residue, which is separated from water and contracts, becomes muscular and floats in water.

After a lapse of a predetermined time, the circulation pump 6 is activated to send jellyfish residue together with fresh water from the discharge box 18a onto the net conveyor 19, and the fresh water passes through the net 19a and is returned from the fresh water tray 23 to the treatment tank 5. The jellyfish residue is discharged from the outlet 21 by the net conveyor 19.

In the experiment based on this example, 2.
The jellyfish living organisms continuously supplied at 5 m ³ were dehydrated in the treatment tank 5 having a volume of 2 m ³ to obtain 0.078 m 3 / h.
It was possible to recover the jellyfish residue of ³ and to dehydrate the jellyfish living body with a high efficiency of 96.9% to make it almost muscular, and it was possible to realize a large volume reduction.

In the above embodiment, the temperature of the fresh water for dehydrating the jellyfish living body is set to the most effective temperature of 85 ° C. or higher and the energy efficient range of 85 ° C. to 90 ° C.
It is possible to dehydrate the jellyfish living body even with fresh water at 5 ° C or higher.

[0020]

As described above, according to the present invention, the living body jellyfish is cut into pieces so that the water in the body can be dehydrated quickly, and the fresh water is heated to 85 ° C or higher. By immersing jellyfish pieces in it, the epidermal tissue of jellyfish is destroyed by the osmotic pressure and heat of fresh water, and the water contained in the body is drained and separated in a relatively short time, causing it to contract and become a relatively stiff muscle. be able to. By removing this jellyfish residue from the warm water and removing the water, the volume of the living jellyfish can be greatly reduced in a short period of time compared to the conventional disposal of living jellyfish, and most of the water in the body is dehydrated. As a result, the weight is reduced, and subsequent disposal processing such as handling, transportation, and landfill can be performed extremely easily. Therefore, a large-capacity reservoir and a large-capacity landfill treatment facility, which were required in the past, are no longer needed, and the treatment capacity is greatly improved, so monitoring of jellyfish generation is also unnecessary and the sanitary environment can be improved.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of a jellyfish dehydration processing apparatus according to the present invention.

[Explanation of symbols]

1 cutter 2 jellyfish supply pump 3 jellyfish reservoir tank 4 drainer 5 processing tanks 6 circulation pumps 7 Water removal device 16 Fresh water heating device 17 Fresh water agitator 19 Net conveyor

Claims (2)

[Claims] 1. A jellyfish characterized by chopping a living jellyfish into pieces and immersing the jellyfish pieces in warm water for a predetermined time to dehydrate muscles and separating the jelly residue after dehydration from the warm water. Method of dehydration treatment. 2. A cutting device for cutting a living jellyfish into pieces, a treatment tank having a fresh water heating device and a fresh water stirring device for immersing the jellyfish pieces cut by the cutting device in warm water for a predetermined time, An apparatus for dehydrating jellyfish, comprising a water removing device for separating water from jellyfish residue treated in a treatment tank.