JPH09229525A - Method for manufacturing salt water ice and device for same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent water from being separated from salt water by producing concen trated salt water in which salt is not separated from water by adding the salt of high content of oxygen, agitating and mixing the concentrated salt water with the water having the high content of oxygen in a proper ratio to prepare the salt water of prescribed concentration and forming the salt water into flaky or granular salt water ice. SOLUTION: A prescribed quantity of concentrated salt water having the concentration of 25% produced in an agitating tank 16 is fed to the salt water concentration adjusting tank 1B of a storage tank l by a metering pump 19. Then, the concentrated salt water is agitated and mixed with water having the high content of oxygen in the salt water concentration adjusting tank 1B by an agitating circulation pump 15 and adjusted so as to have the concentration of 2 to 3.5%. The adjusted salt water is fed to an ice making machine 21 by a pump 20 to obtain flaky or granular salt water ice. Herein, the salt water ice is returned to the salt water concentration adjusting tank 1B via a return pipe P and may be branched to be returned to the agitating tank 16. Since the salt water which does not become ice is cooled in the ice making machine 21, the temperature of water in the salt water concentration adjusting tank 1B is maintained at 4 to 10 deg.C.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for producing salt water ice, which are used for storing marine fish and shellfish in a low temperature state without losing their freshness.

[0002]

2. Description of the Related Art Generally, ice is used to store marine fish and shellfish in a cooled state. However, colorants such as sea bream and flounder, mackerel, sardines, sardines, squids, etc., come into direct contact with the ice. Then, it causes ice frost and discolors, so we have taken measures to prevent discoloration by interposing a plastic film or the like to prevent direct ice contact. However, this method is not suitable for keeping seafood high in freshness.

It is well known to use low-temperature seawater to maintain high freshness of marine-derived seafood. The reason for using seawater is to maintain a condition close to the habitat of the seafood and maintain a constant concentration balance of the seafood inside and outside the body. However, even with this method, since ice is put in seawater to maintain a low temperature state, the ice melts with the passage of time and the concentration of seawater decreases, and high freshness is maintained for a long time. Is difficult In addition, seawater is contaminated with plankton, germs and the like, which is not preferable in terms of hygiene.

[0004]

Therefore, if there is salt water ice whose salt water concentration is kept constant even after melting,
It is preferable because it can prevent ice burn and keep the salt water concentration at a constant temperature. However, salt water and ice are separated during the ice making process due to differences in freezing point temperature and specific gravity of water and salt water. It was said to be impossible to manufacture.

Even so, attempts have been made to produce salt water ice, and various apparatuses therefor have been proposed. However, in the devices according to those proposals, an attempt is made to form an ice layer containing salt on the outer side of fresh water grain ice as a nucleus,
It was only pressed into flakes to make the grains larger, and it was not possible to produce very salt water ice.

Therefore, the problem to be solved by the present invention is that the manufacturing method is essentially different from the above-described conventional salt water ice manufacturing apparatus, and it is possible to prevent water and salt water from separating in the ice making process, Moreover, it is another object of the present invention to provide a new method for producing salt water ice and an apparatus for the same, in which the concentration of contained salt can be freely adjusted.

[0007]

The structure of the method for producing salt water ice according to the present invention, which has been made for the purpose of solving the above-mentioned problems, has a method of mixing ozone generated by an ozone generator with water and water having a high oxygen content. Then, salt is added to the generated high oxygen content water and mixed with stirring to generate concentrated salt water in which water and salt do not separate, while the concentrated salt water is stirred and mixed with the high oxygen content water at an appropriate ratio. Is adjusted to a desired concentration of salt water, and the salt water is made into flaky or granular salt water ice through an ice making means, and the structure of the salt water ice producing apparatus of the present invention is An ozone generator, an ozone mixer for mixing ozone generated by the generator with water, a water storage tank for storing water with a high oxygen content generated in the mixer, and a water with the high oxygen content Adds salt to a portion and mixes with stirring to produce concentrated salt water. The stirring tank, the salt water concentration adjusting tank for adjusting the salt water of the stirring tank and the high oxygen content water in the water storage tank at a proper ratio by stirring and mixing to adjust the salt water to a desired concentration, and the salt water are supplied from the adjusting tank. Ice-making means for rapidly cooling salt water to form flaky or granular salt-water ice, an ice storage for storing salt-water ice produced by the ice-making means, and freezing for supplying a refrigerant to these ice-making means and ice-storage It consists of a machine and a machine.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of an apparatus for carrying out the salt water ice manufacturing method of the present invention, and FIG. 2 is a side view of an example of the salt water ice manufacturing apparatus of the present invention described with reference to FIG.

In FIG. 1, reference numeral 1 is a storage tank having a water storage portion 1A and a salt water concentration adjusting tank 1B provided therein, and 2 is an internal partition wall separating the water storage portion 1A and the salt water concentration adjusting tank 1B. Further, water or salt water is allowed to flow over the partition wall 2 to the water reservoir 1A or the salt water concentration adjusting tank 1B side. The water storage section 1A and the salt water concentration adjusting tank 1B can be formed as independent storage tanks.

Reference numeral 3 denotes a water supply valve for supplying fresh water such as tap water to the water storage portion 1A, and 3A denotes a water level adjusting flow for adjusting the amount of water supplied by the water supply valve 3 into the water storage portion 1A.
G, 4 are drainage valves of the water reservoir 1A, and 5 is a water level meter.

Reference numeral 6 denotes an ozone generator 7 for the water from the water storage portion 1A.
An ozone mixer for mixing the ozone generated in 1. and sealing it in water, 8 is a pump for circulating water, and 9 is a ceramic filler having a filter function. When the water reservoir sent from 1A water mixed with ozone in an ozone mixer 6, ozone (O ₃₎ since its nature is very unstable, immediately molecular oxygen (O ₂₎ and oxygen (O )
It is decomposed into water, and this oxygen atom (O) has the property of binding oxygen atoms to each other to form an oxygen molecule (O ₂ ), or binding with other atoms or acting positively on other substances. It reduces the residual chlorine, deodorizes or kills E. coli and other bacteria. On the other hand, oxygen molecules (O ₂ )
Is stable and, by passing through the ceramic packed bed of the ceramic filler, clusters of water molecules
The smallest molecule of is dissolved. Therefore, the water discharged from the ozone mixer 6 contains oxygen (O ₂ ) which is usually ₂ times.
It becomes water with a high oxygen content (active water) containing about double the amount of 16 ppm, and since it has been sterilized, it is suitable as a raw material for ice production. When the water temperature approached 4 ° C and oxygen (O ₂ ) was dissolved at 16ppm or more, chlorine molecules (C
Since l ₂ ) almost disappears and odorless water is produced, it is clear that it is also suitable as a raw material for producing ice from this point. Incidentally, tap water can be made to pass through the ceramic packed bed in the ceramic packing device under constant pressure over and over again to further reduce the water clusters. The effect of can be taken in, so when you drink this water, it is warmed in the body and emits weak far-infrared rays, which directly stimulates human body cells like double dissolved oxygen. It should be noted that tap water with a pH of 6.5 is PH7.3 due to electromagnetic waves emitted by ceramics.
It becomes weak alkaline ionized water.

Reference numeral 10 is a valve for stopping the circulation of water in which ozone is sealed by the ozone mixer 6 to the water storage section 1A,
This is for adjusting the inflow direction and the inflow amount of water together with the valve 11 for flowing water into the salt water concentration adjusting tank 1B.
12 is a flow meter for measuring the flow rate of water flowing into the salt water concentration adjusting tank 1B, 13 is a water level meter of the salt water concentration adjusting tank 1B, 14 is a drain valve, and 15 is stirring for stirring and mixing the inside of the salt water concentration adjusting tank 1B. It is a circulation pump for.

Reference numeral 16 is a part of water in which ozone generated by the ozone mixer 7 is enclosed (inflow path is not shown),
A stirring tank for adding salt and stirring and mixing so that the water and the salt are not separated, and making concentrated salt water, 17 is a stirring blade motor for rotating the stirring blade 17a in the stirring tank 16, and 18 is Flow
Switch. Reference numeral 19 is a metering pump for sending the concentrated salt water produced in the stirring tank 16 to the salt water concentration adjusting tank 1B.

Although the concentration of the concentrated salt water produced in the stirring tank 16 can be adjusted as appropriate, here, concentrated salt water having a concentration of 25% is prepared,
The stirring blade 17a constantly stirs so that water and salt are not separated. The concentration of this concentrated salt water of 25% is an example, and it is sufficient that the concentration range is at least ± 7% around this 25%. In addition, the inner wall surface of the stirring tank 16, the stirring blade 17a, and other parts in contact with liquid that directly come into contact with concentrated salt water are made of highly corrosion-resistant members. For example, titanium material, highly corrosion-resistant fluorine resin, and silicon resin. A synthetic resin such as the above may be used, and a coating material having high corrosion resistance may be applied to the liquid contact portion.

In the salt water ice producing apparatus of the present invention, after a predetermined amount of concentrated salt water having a concentration of 25% made in the stirring tank 16 is sent to the salt water concentration adjusting tank 1B of the storage tank 1 by the constant amount pump 19, Water with a high oxygen content in this salt water concentration adjusting tank 1B is agitated and mixed by a circulation pump 15 for agitation to obtain a concentration of 2
Adjusted to be 3.5%.

The salt water adjusted to this concentration of 2 to 3.5% is
It is sent to the ice making machine 21 by the pump 20 and made into flaky or granular salt water ice. Of the salt water sent to the ice making machine 21, the salt water that does not become ice is returned to the salt water concentration adjusting tank 1B via the return pipe P here, but it is also branched and returned to the stirring tank 16. You can also Incidentally, since the salt water that does not become ice is cooled in the ice making machine 21, the temperature of the water in the salt water concentration adjusting tank 1B is maintained at 4 to 10 ° C even in the summer, so that the salt water sent to the ice making machine 21 is It can be sent at a low temperature, and the ice making capacity of the ice making machine 20 can be enhanced.

Reference numeral 22 is an ice storage for storing salt water ice made by the ice making machine 21, and 23 is a refrigerator for circulating and supplying a refrigerant to the ice making machine 20 and the ice storage 22. The inside of the ice storage 22 is maintained at a temperature of about -20 ° C in order to prevent the salt water ice from melting.

Next, referring to FIG. 2, a specific configuration of the salt water ice producing apparatus according to the embodiment of the present invention described with reference to FIG. 1 will be described.

In FIG. 2, A is an apparatus for producing and supplying salt water by active water, which incorporates all of the storage tanks or pumps described with reference numerals 1 to 20 in FIG. 1, and B is numeral 21 in FIG. The ice-making machine described above, C is the ice storage described as reference numeral 22 in FIG. 1, D and E are those described as the refrigerator 23 in FIG. 1, and D is an ice storage freezing for cooling the inside of the ice storage C. Machine E is an ice making refrigerator for supplying a refrigerant to the ice making machine B.

The ice maker B circulates a coolant to supply salt water to the inner metal wall surface cooled by rotating and spraying the salt water, and scrapes the salt water ice formed on the inner metal wall surface with a scraping device to store ice. It is for storing in the storage C. 31
Is a cold insulating material provided on the outer periphery of the ice making machine B, 32 is a metal plate provided inside the cold insulating material 31 with a refrigerant supply pipe 33 interposed, and 34 is salt water supplied from the salt water producing and supplying apparatus A. Hollow rotary shaft for spraying on metal wall surface, 35 is this rotary shaft 34
The reference numeral 36 designates a salt water spray pipe provided on the upper part of the scraper, and the scraper 36 is attached to the rotary shaft 34 in a branch shape.

In the ice making machine B, the refrigerant supplied from the ice making refrigerator E circulates in the refrigerant supply pipe 33, and the inside of the metal plate 32 cooled to approximately -30 ° C. to -50 ° C. is covered with active cold water. The salt water supplied from the salt water production / supply unit A is sprayed with a salt water spray pipe by the centrifugal force generated by the rotation of the rotary shaft 34.
When sprayed from 35, salt water ice 37 is formed so as to form a thin layer on the inner surface of the metal plate 32, so the salt water ice 37 is scraped off from the inner surface of the metal plate 32 by the tip of the scraper 36.
The rotation speed of the rotary shaft 34 is about one rotation in about 10 seconds, but this rotation speed can be appropriately changed.

The salt water ice 37 scraped off by the tip of the scraper 36 has a flaky or granular shape, drops as it is, and is accumulated and stored in the ice storage C as shown by a broken line S. . Although the salt water ice 37 has a temperature of about -4 ° C, it retains at about -6 ° C because it takes heat when the oxygen contained therein is released. The inside of the ice storage C is kept at a temperature of about -20 ° C by the ice storage refrigerator D in order to prevent the salt water ice 37 from being melted. Further, the salt water that has not turned into salt water ice is returned to the salt water production / supply device A. Since this salt water is cooled in the ice making machine B, the salt water production / supply device A is kept at a low temperature (about 4 ° C.). Can be held at 38 is a door of the ice storage C, which serves as an outlet for the salt water ice 37 of the ice storage C.

[0023]

The present invention is as described above. Since the salt water ice producing apparatus of the present invention can produce salt water ice by a method completely different from the conventional salt water ice producing method, the conventional fresh water ice is used as a core. As a result, it is possible to produce flaky or granular salt water ice containing salt even in the core, instead of salt water ice having salt water adhered to the outside thereof.

The salt water ice produced according to the present invention has a small difference in salt concentration between the core and the outside thereof. For example, salt water ice whose salt concentration is adjusted to a state close to that of seawater melts. However, since it is possible to maintain a state close to seawater, it is possible to maintain marine-derived seafood with high freshness.

Further, although depending on the salt concentration of salt water ice and the environment in which it is used, the salt water ice produced according to the present invention can be used to maintain a temperature of -4 ° C to -6 ° C for a long time. Its usage is 1/3 to 1 / than freshwater ice
There is also the effect that only 2. The temperature of this salt water ice is low because the freezing point temperature is lower than that of normal fresh water ice, and the surface temperature of the ice decreases because it takes latent heat when oxygen goes out from the salt water ice. Seems to be.

Furthermore, the salt water ice made according to the present invention comprises:
Even if it comes into direct contact with colored things such as sea bream and flounder, mackerel, sardines, sardines, squid, etc., there is no need to take special measures to prevent discoloration due to ice frosting during storage.

[Brief description of drawings]

FIG. 1 is a block diagram of an apparatus for carrying out the method for producing salt water ice according to the present invention.

FIG. 2 is a side view of an example of the salt water ice producing apparatus of the present invention described with reference to FIG.

[Explanation of symbols]

 1 Water Reservoir 1A Water Reservoir 1B Salt Water Concentration Control Tank 2 Internal Partition Wall 3 Water Supply Valve 3A Water Level Control Float 4,14 Drain Valve 5,13 Water Level Level Meter 6 Ozone Mixer 7 Ozone Generator 8 Pump 9 Ceramic Filling Vessel 10, 11 Valve 12 Flow meter 15 Circulation pump for stirring 16 Stirring tank 17 Motor for stirring blade 18 Float switch 19 Metering pump 20 Ice maker 21 Pump 22 Ice storage 23 Freezer A Salt water production supply device B Ice maker C Ice Storage D Ice Storage Refrigerator E Ice Making Refrigerator

Claims (4)

[Claims] 1. Ozone generated in an ozone generator is mixed with water to generate water with a high oxygen content, and salt is added to the generated water with a high oxygen content and mixed by stirring to separate water from salt. While producing concentrated salt water, the concentrated salt water is stirred and mixed with the high oxygen content water at an appropriate ratio to adjust to a desired concentration of salt water,
A method for producing salt water ice, characterized in that the salt water is made into flaky or granular salt water ice through an ice making means. 2. An ozone generator, an ozone mixer for mixing ozone generated by the generator with water, a water storage tank for storing water having a high oxygen content generated in the mixer, and the high oxygen. Salt is added to a part of the content water and stirred to generate a concentrated salt water, and a corrosion-resistant stirring tank, and the concentrated salt water of the stirring tank and the water of high oxygen content in the water storage tank are stirred at an appropriate ratio. A salt water concentration adjusting tank for mixing and adjusting to a desired concentration of salt water, an ice making means for rapidly cooling the salt water supplied from the adjusting tank to form flaky or granular salt water ice, and the ice making means An apparatus for producing salt water ice, comprising: an ice storage that stores salt water ice, and a refrigerator that supplies a refrigerant to the ice making means and the ice storage. 3. The apparatus for producing salt water ice according to claim 2, wherein the concentrated salt water is supplied from the stirring tank to the salt water concentration adjusting tank by a metering pump. 4. The ice making means scrapes the salt water ice formed on the metal wall surface by contacting and supplying salt water having a concentration adjusted to the metal wall surface formed by circulating a cooling medium to cool the metal wall surface. The salt water ice production apparatus according to claim 2 or 3, wherein the salt water ice is scraped off by the removing means and stored in the ice storage.