JP4280868B2 - Seawater concentration apparatus and seawater concentration method - Google Patents

Description

  The present invention relates to an apparatus for concentrating seawater, a concentration method, and concentrated water obtained by concentrating seawater, and can be used for foods, beverages, cosmetics, pharmaceuticals, etc. The present invention relates to concentrated water suitable for use as feed water used for manufacturing or cooking water for sushi.

  It has been practiced to use deep ocean water, which is well-balanced and contains abundant essential trace elements and various minerals, as soy sauce preparation water and sushi cooking water.

  Conventionally, as a method for concentrating seawater (deep ocean water) or desalinating seawater, an evaporation method in which water in the seawater is evaporated by heating, a membrane separation method (Japanese Patent Laid-Open No. 9-248429), an electrodialysis method (specialized) No. 2002-205070) and reverse osmosis (Japanese Patent Laid-Open No. 2000-354864) are known.

  Furthermore, in the evaporation method, it is generally known that steam is used to heat seawater. For example, after injecting seawater (deep seawater) into a tank, the seawater is heated by feeding the heated steam into the tank. However, there is a method of concentrating or desalination by evaporating the water of seawater.

  However, in the case of heating using such steam, if the temperature of the heating steam is not higher to some extent than the boiling temperature of the liquid to be heated, the steam temperature is raised to a high temperature because rapid heat transfer is not performed. It is necessary to set, and when the steam temperature is set to a high temperature, the seawater is heated rapidly, causing a problem of bumping.

  And this bumping damages the mineral components that are abundant in deep sea water, which is the best for soy sauce preparation water and sushi cooking water, and impurities, calcium sulfate, etc. are generated by rapid heating. Was also causing. In addition, if this calcium sulfate crystallizes and settles in the tank, it may cause a failure of the machine, etc., and the membrane separation method may cause problems such as clogging the membrane and deteriorating the performance of the membrane. The problem was that the operator was forced to perform excessive maintenance to remove the problem.

JP-A-9-248429 JP 2002-205070 A JP 2000-354864 A

  Therefore, the present invention can suppress the bumping due to heating without reducing the heating efficiency at the time of heating the deep ocean water, and further, the mineral components and umami components abundant in the ocean water, in particular, the deep ocean water. It is an object of the present invention to provide a seawater concentrating device, a concentrating method, and a concentrated deep ocean water obtained thereby, which can suppress generation of scales such as impurities and calcium sulfate without impairing.

In order to solve the above problems, the present invention employs the following means (1) to (11).
(1) The seawater concentration apparatus of the present invention includes a concentration tank 2 that holds heat-treated seawater, and a heat source chamber 3 that is supplied with a heat source required for heat treatment using water. And the said heat source chamber 3 is provided in the outer periphery of the said concentration tank 2, or the tank through the heat-transfer wall.

  In such a case, seawater is indirectly heated through a heat transfer wall by a heat source (for example, steam or hot water) using water supplied to the heat source chamber. It is possible to evaporate water in seawater without causing water. For this reason, generation | occurrence | production of scales, such as an impurity and calcium sulfate, can be suppressed, without impairing the various components (for example, nutrient salts and mineral component contained in surface water).

  In particular, in the case of using deep sea water that is clean and rich in minerals, especially from deep sea 200m below sea level or deeper than sea water, the deep sea water is heated relatively slowly. Decomposition and evaporation of umami components such as nutrient salts and mineral components abundant in water can be suppressed, and high-quality concentrated deep water rich in minerals can be obtained. Moreover, even when surface water is used as seawater, various components such as inorganic nutrients contained in the surface water can be efficiently extracted, and generation of scales such as impurities and calcium sulfate can be suppressed.

  (2) Moreover, in the said concentration apparatus, it is preferable that the said heat source chamber 3 is provided so that the substantially lower half of the outer peripheral surface of the said concentration tank 2 may be contact | connected.

  If it is such, while ensuring the amount of concentrated water, the contact area between the heat source chamber 3 and the concentration tank 2 can be reduced, bumping due to rapid heating can be reliably prevented, and the evaporation amount of seawater can be reduced. It can be controlled moderately.

  (3) Furthermore, in any of the above-described concentrating apparatuses, the heat source chamber 3 may be provided in the concentrating tank 2.

  If it is such, rapid heating like the case where steam etc. are sent directly into the concentration tank 2 and seawater is heated can be suppressed, and the contact area between the heat source chamber 3 and seawater becomes large. The heat transfer efficiency from the heat source chamber is improved. For this reason, the water | moisture content in seawater can be evaporated more rapidly and efficiently, suppressing bumping.

  (4) Further, in any of the above-described concentrating devices, a pressure adjusting device that adjusts the pressure in the concentrating tank 2 may be provided.

  If this is the case, the decompression environment in the tank, such as the temperature at which the calibration is generated, can be achieved by reducing the pressure in the concentration tank 2 without setting the temperature of the steam supplied to the heat source chamber to a high temperature. It can be easily and reliably adjusted to efficiently concentrate seawater.

  (5) Further, the concentrator includes a seawater injecting device that injects seawater into the concentrated layer 2 while adjusting the amount of seawater. The seawater level in the concentrating tank 2 is a heat source chamber in the seawater injecting device. It is preferable that the amount of seawater to be injected is appropriately adjusted so as to be located above 3.

  If it is such, even when seawater evaporates and the water level is lowered, the seawater injection device adjusts the amount of seawater as appropriate, so the seawater surface is located below the heat source chamber, so-called It is possible to prevent airing. When the heat source chamber becomes empty, moisture slightly attached to the heat source chamber due to the heat evaporates instantly, resulting in the mass production of scales such as impurities and calcium sulfate. Can be efficiently suppressed or prevented.

  (6) Furthermore, in any of the above-described concentrating devices, a stirrer for appropriately stirring the injected seawater may be provided in the concentrating tank 2.

  If this is the case, it is possible to further improve the efficiency of heat transfer to seawater and shorten the heating time, and it is possible to remove scales such as impurities adhering to the inner wall of the concentration tank without using hammering. Therefore, maintenance becomes easy.

  (7) Furthermore, in any of the above-described concentrators, the heat source chamber may be a serpentine tube.

  If it is such, since the contact area of a heat source chamber and seawater becomes still larger, even when the temperature of the supplied steam etc. is set still lower, heat transfer efficiency can be maintained.

  In addition, the scales such as impurities attached to relatively thin serpentine tubes are expanded and contracted due to temperature changes, so they can crack and be expected to fall off the serpentine tube and fall naturally. Becomes easier.

  (8) Alternatively, the method for concentrating seawater according to the present invention is the concentrating device 1 in which the heat source chamber 3 is provided in the outer periphery of the concentrating tank 2 holding the seawater or in the tank with a heat transfer wall interposed therebetween. In a state where seawater is injected and the concentration tank is depressurized, heated steam or hot water is supplied to the heat source chamber 3 as a heat source, and the seawater in the concentration tank 2 is heated to evaporate moisture in the seawater and remain. It is characterized by obtaining concentrated water.

  If it is such, since seawater is indirectly heated via the heat transfer wall by the heated steam or hot water supplied to the heat source chamber 3, the seawater does not cause bumping due to sudden heating. Water inside can be evaporated. Further, it is possible to concentrate seawater by suppressing generation of scales such as impurities and calcium sulfate without impairing mineral components and umami components rich in deep ocean water.

  (9) In the concentration method, the heat source chamber 3 may be provided in the concentration tank 2.

  If it is such, since the contact area of the heat source chamber 3 and seawater will become larger and the heat transfer efficiency from the heat source chamber 3 will be improved, the water | moisture content in seawater can be evaporated more rapidly and efficiently. it can.

  (10) The concentrated deep ocean water of the present invention is obtained by concentrating deep ocean water by any one of the above-described enrichment methods.

  With such a thing, decomposition | disassembly and evaporation of various mineral components contained in deep sea water can be suppressed, and concentrated water rich in rich nutrients and minerals can be obtained with high cleanliness.

  (11) Alternatively, in the concentration method 1 of the present invention, in the concentration apparatus 1 in which the heat source chamber 3 is provided on the outer periphery of the concentration tank 2 holding seawater with a heat transfer wall provided, Injecting deep water and supplying the steam or hot water as a heat source to the heat source chamber 3 in a state where the inside of the concentration tank 2 is depressurized, the ocean deep water in the concentration tank 2 is heated and moisture in the deep water is heated. Is evaporated, and the evaporated water is condensed to obtain distilled deep water.

  By adopting the above means, it is possible to suppress bumping due to heating without lowering the heating efficiency when heating deep ocean water, and without compromising mineral components and umami components rich in deep ocean water. Further, it is possible to provide a seawater concentration apparatus and concentration method capable of suppressing the generation of scales such as impurities and calcium sulfate, and the concentrated deep ocean water obtained thereby.

The seawater concentration apparatus and concentration method of the embodiment of the present invention will be described below.
(About seawater concentration equipment)

   FIG. 1 is a front view of a concentration device 1 for seawater (deep ocean water) according to the present invention, and FIG. 2 is a schematic cross-sectional view of the concentration device 1.

  As shown in FIGS. 1 and 2, the concentrating device 1 includes a concentrating tank 2 that holds seawater and is heated inside, and a heat source chamber 3 that is supplied with heated steam as a heat source. Configured.

  The concentration tank 2 holds the seawater to be heat-treated in the tank (inside itself). Specifically, as shown in FIG. 1, the container is a cylindrical container having a capacity of 650 liters, and a seawater inlet 20 to which the seawater injection regulator 4 is connected and a pressure regulator 5 are connected to the upper end. A viewing window 22 is formed so that the inside of the pressure port 21 and the concentration tank 2 can be seen. In addition, a discharge port 23 for taking out the concentrated seawater is formed at the lower end of the concentration tank 2.

  Here, as the material of the concentration tank 2, stainless steel, molybdenum-mixed metal, nickel / chromium molybdenum steel, heat-resistant alloy, etc. excellent in heat transfer, heat resistance, corrosion resistance and the like can be used. In addition, it is preferable that the outer peripheral surface except the heat transfer wall in the concentration tank 2 is made of FRP (glass fiber reinforced resin). Since FRP has the characteristics that it is lightweight and has excellent heat resistance and heat insulation properties, it does not allow heat to escape to the outside, so that the worker can perform the work safely, can easily perform maintenance, and can improve work efficiency.

  The seawater injection adjusting device 4 automatically or manually adds the seawater stored in the seawater tank automatically or manually based on the information from the level sensor S that measures the water level of the seawater injected into the concentration tank 3. So as to be injected into the concentration tank 2.

  Here, the seawater is not poured into the concentration tank 2 in a full tank, but, for example, about two-thirds of the concentration tank 2 (more specific) In particular, about 400 to 550 liters (preferably 500 liters in the present embodiment) is used as an upper limit, and injection is performed so as to provide a certain amount of space in the concentration tank 2.

  The pressure adjusting device 5 includes a pressure pump 50 and a pressure gauge 51 and is connected to the concentrating tank 2 through the pressure port 21 via the pressure pipe 52 in order to adjust the pressure in the concentrating tank 2. Further, a seal pot may be connected to the upper end portion of the concentration tank 2 in order to maintain a negative pressure.

  When the pressure pump 50 is operated, the air in the concentration tank 2 is discharged from the pressure port 21 provided at the upper end portion of the concentration tank 2 via the pressure pipe 52, so that the inside of the concentration tank 2 is decompressed. In this reduced pressure state, calibration occurs in an environment lower than the boiling point at room temperature, and a distillation action occurs.

  At this time, by working while confirming the degree of decompression with the pressure gauge 51, it is possible to adjust the boiling temperature of the seawater and the salt concentration in the concentrated water while adjusting the calibration generation environment in the tank. Specifically, for example, the degree of decompression can be increased to decrease the salinity concentration in the concentrated water, or the degree of decompression can be lowered to increase the salinity concentration.

  The heat source chamber 3 is a chamber to which a heat source necessary for heat treatment using water is supplied, and is provided in the outer periphery of the concentration tank 2 or in the tank via a heat transfer wall. Specifically, as shown in FIG. 1 and FIG. 2, it is provided in a manner in contact with the substantially lower half of the outer peripheral surface.

  As the material of the heat source chamber 3, stainless steel or the like can be used in the same manner as the concentration tank 2, but the heat transfer wall W made of metal or the like having excellent heat transfer efficiency on the contact surface between the heat source chamber 3 and the concentration tank 2 is used. It is preferable to pass through. In addition, it becomes a high safety | security by making the outer peripheral surface except a heat-transfer wall into FRP.

  In addition, the heat source chamber 3 is formed with a steam port 30 to which a steam producing / supplying device 6 for supplying the steam produced by the boiler B into the heat source chamber 3 is connected.

  The contact portion between the heat source chamber 3 and the concentration tank 2 is not limited to the substantially lower half of the outer peripheral surface of the concentration tank 2 as in the present embodiment, Or you may contact | abut 1/3 of an outer peripheral surface. Here, since the amount of heat transferred to the seawater increases in proportion to the size of the contact surface between the heat source chamber 3 and the concentration tank 2, it is desirable to increase the contact area in consideration of the heating efficiency. It is desirable to make it a size that can be suppressed or prevented.

  That is, when the seawater in the concentration tank 2 evaporates and the water level of the seawater falls, a non-contact portion is formed between the heat transfer wall W and the seawater, and the heat source chamber 3 in the portion is in a so-called empty state. Become. Since the heat source chamber 3 is kept at a high temperature by steam or the like, when water droplets or the like of seawater come into contact with this empty portion, impurities (scale) such as calcium sulfate are generated in an instant and are generated in the concentration tank 2. It will adhere.

  In the present invention, this contact surface is always filled with seawater so as not to produce an empty portion. Specifically, when the water level falls due to the evaporation of seawater, the seawater level is controlled by the seawater injection adjusting device 4 so that the sea level in the concentration tank 2 is always located above the heat source chamber 3. .

  Since the seawater concentrating device 1 has the above-described configuration, the following effects are particularly obtained.

  Since the seawater is indirectly heated via the heat transfer wall W by the heated steam supplied to the heat source chamber 3, the water in the seawater can be evaporated without causing sudden boiling due to rapid heating. . Moreover, generation | occurrence | production of scales, such as an impurity and a calcium sulfate, can be suppressed, without impairing the mineral component and taste component which are abundant in deep sea water. Therefore, in the conventional electrodialysis method and reverse osmosis method, when removing impurities contained in the deep ocean water, the umami component required for the soy sauce preparation water and sushi cooking water is also removed. The problem can be solved, and concentrated deep water that is particularly suitable for soy sauce preparation water and sushi cooking water can be provided.

  In the present embodiment, the heat source required for the heat treatment supplied to the heat source chamber 3 is steam produced by the boiler B. However, the present invention is not limited to this. For example, hot water can be used. It is. In this case, as compared with steam heating, bumping can be further suppressed, and generation of impurities (scale) such as calcium sulfate can be suppressed.

  As shown in FIGS. 3 and 4, the concentrating device 1 may be provided with a stirrer K at the center of the seawater injected into the concentrating tank 2, and the concentrating tank 2 with the heat source chamber 3 as a serpentine tube. You may make it provide in.

  The stirrer K according to the embodiment is based on a rotary blade method, and has a type having one large blade shape as shown in FIG. 3 or a type having a plurality of small blades as shown in FIG. It may be. Other stirring methods may be used. The rotational axis of the rotary blade is preferably along the tank-shaped axis of the concentration tank 2 from the viewpoints of weight, rotational stability, and heat transfer efficiency.

  As an aspect in which the heat source chamber 3 is provided in the concentration tank 2, when the heat transfer wall W is not provided on the outer periphery of the concentration tank 2, the concentration tank 2 is made of FRP (glass fiber reinforced resin). It is preferable. Since FRP has the characteristics that it is lightweight and has excellent heat resistance and heat insulation properties, it does not allow heat to escape to the outside, and an operator can perform work safely. In addition, since FRP is usually translucent, it can be expected that early discovery of a scale and the like by visual confirmation in the concentration tank 2, facilitating maintenance accompanying it, and improvement of work efficiency will be expected.

  Furthermore, when the serpentine tube as the heat source chamber 3 is provided in the concentration tank 2, it is preferable that the heat source chamber 3 is positioned at the center of the substantially lower half of the concentration tank 2 as shown in FIG. 4. As a result, the seawater may be injected to such an extent that the serpentine tube is completely immersed, and a space for decompression can be provided in the upper part of the concentration tank 2, and even when evaporation proceeds and the seawater level drops, This is because the sea level can be adjusted as appropriate by the seawater injection adjusting device 4, so that the sea level can always be maintained above the serpentine tube, and airflow of the serpentine tube can be prevented.

  The size of the snake tube is not limited to approximately half of the concentration tank 2 as shown in FIG. 4, and may be two-thirds or one-third of the concentration tank 2.

  As described above, when the seawater is appropriately stirred using the stirrer K, a large number of bubbles can be generated in the seawater, and the surface area of the seawater is increased and the efficiency of heat exchange from the heat source chamber 3 is improved. Heat transfer efficiency is improved, the amount of evaporation is increased, and the heating time can be shortened. Further, as the surface area of the seawater increases, the evaporation area also increases, so that the agitator K can also suppress the sudden boiling of the seawater and prevent scale.

  In addition, even when the scale adheres to the inner wall or the serpentine tube of the concentration tank 2 due to long-term use, water or seawater is poured into the concentration tank 2 at the time of maintenance, and stirred by the stirrer K. The scale attached to the inner wall and the snake tube can be easily peeled off. This eliminates the need for conventional hammering and facilitates maintenance. Here, in view of the solubility of the adhesion scale, it is preferable that the injected water at the time of maintenance is tap water rather than seawater. In addition, when the injected water is hot water of about 40 degrees to about 90 degrees, especially hot water of about 80 degrees, components such as calcium sulfate in the adhesion scale dissolve in a shorter time. Therefore, it is preferable. The numerical value of more than about 40 degrees to less than about 90 degrees indicates that calcium sulfate begins to precipitate at 40 degrees in deep water having a salt concentration of 11.2% (W / W) in the vacuum evaporation method, This is based on the fact that calcium sulfate begins to precipitate at 90 degrees in deep water having a concentration of 17.8% (W / W).

  In addition, by providing the heat source chamber 3 in the concentration tank 2, the contact surface between the heat source chamber 3 and seawater becomes larger than when it is provided on the outer peripheral surface, so that the heat transfer efficiency can be further improved and supplied. Even when the temperature of the steam or the like is set to a low temperature, the water in the seawater can be evaporated without lowering the heating efficiency.

(About seawater concentration method)
Next, a method for concentrating seawater according to an embodiment of the present invention will be described below. FIG. 5 is a flowchart showing a schematic configuration of the deep ocean water concentration method of the present invention.

  As shown in FIG. 5, the concentration method of the present embodiment includes (1) a heating step for heat-treating deep ocean water in the concentration tank 2, (2) a pressure-reduction step for pressure-reducing the inside of the concentration tank 2, ( 3) A water level adjusting step for adjusting the level of deep ocean water in the concentration tank 2. Hereinafter, each step will be described in detail.

(1. Heating process)
The heating step is a step of concentrating the deep ocean water by heating the deep ocean water in the concentration tank 2 and evaporating the water. Specifically, after the steam heated by the boiler B is generated, the steam is supplied to the heat source chamber 3 through the steam pipe 60, and the heat of the steam indirectly through the heat transfer wall W in the deep ocean layer in the concentration tank 2. Heat is transferred to water.

(2. Depressurization step)
The decompression step is a step of decompressing the concentration tank 2. Specifically, the pressure (vacuum) pump 50 is operated, and the air in the concentration tank 2 is discharged from the pressure port 21 provided at the upper end portion of the concentration tank 2 via the pressure pipe 52, and the inside of the concentration tank 2 is exhausted. Reduce pressure. Here, since the pressure pipe 52 is also connected to the pressure gauge 51, it is possible to control the pressure while confirming at any time so as to obtain a desired pressure. Under a reduced pressure environment, the boiling point of water is lowered, so that evaporation of deep sea water is promoted.

(3. Water level adjustment process)
The water level adjusting step is a step of appropriately replenishing the deep sea water when the water level is lowered due to evaporation of water. As shown in FIG. 5, in the heat source chamber 3 provided so as to be in contact with the substantially lower half of the outer peripheral surface of the concentration tank 2, the seawater, which was initially about 500 liters as the concentration of seawater progresses, As a result, the water level drops, and a non-contact portion is formed between the heat transfer wall W and the seawater in the vicinity of 250 liters, and the portion is in a so-called empty state.

  And since the heat source chamber 3 is kept at a high temperature, when a drop of seawater touches the empty portion, it instantly evaporates and impurities (scale) such as calcium sulfate is generated and adheres to the concentration tank 2. End up. In this step, the water level is controlled by the seawater injection adjusting device 4 so that the water level of the seawater surface in the concentration tank 2 is always located above the heat source chamber 3 in order to prevent this emptying.

  In this way, by repeating the evaporation and replenishment of seawater several times, it is possible to concentrate seawater while suppressing the generation of impurities, calcium sulfate, and the like without damaging mineral components and umami components rich in deep ocean water.

  The number of times seawater evaporates and replenishes, and the width (amount) of the upper and lower limits of the sea level is determined by the intended use and amount of concentrated water. If the desired salinity and amount are set in advance on the control panel, the seawater injection adjustment device 4 controlled by the computer can be controlled by a seal pot or a water supply solenoid valve based on information from the level sensor S or pressure sensor. The sea level is automatically controlled and the seawater is repeatedly evaporated and replenished.

  At this time, the upper and lower positions of the sea level in the concentration tank 2 can be grasped electronically by measuring the pressure change in the concentration tank 2 in addition to the level sensor S.

  In the embodiment of the present invention, for example, concentrated water (concentrated deep water) used as feed water for soy sauce from seawater (deep ocean water) having an initial salinity of 3.4%, the salinity is 6 to When the concentration is set so that 18% (preferably 7-10%) of concentrated water is produced, and the upper limit of the sea level is set to 500 liters and the lower limit is set to 250 liters, the seawater injection control device 4 automatically controls the water level. Repeat 2 to 5 times.

  Furthermore, as shown in FIG. 5, when the water vapor sucked from the concentration tank 2 by the pressure pump 50 via the pressure pipe 52 is condensed by the condenser C and further passed through the gas-liquid separator 7, the water amount becomes constant. By extracting from the gas-liquid separator 7 with a water extraction pump, distilled deep water can also be generated. The distilled deep water recovered in this way can be used for various applications such as foods, beverages and cosmetics.

(Effect when applied to soy sauce feed water)
The effects when the concentrated water of the present invention is applied to, for example, soy sauce charging water will be described. Generally, among soy sauces, soy sauce having a salt concentration of 8% (W / V) or less or 9% (W / W) or less is said to be low-salt soy sauce, but produced by a conventional method (for example, an ion exchange membrane method). Reduced salt soy sauce using concentrated water has a problem that the taste component such as minerals contained in seawater is impaired and the taste is deteriorated, and when alcohol or potassium chloride as a preservative is mixed, the flavor drops. And problems such as activation of microorganisms and lactic acid bacteria.

  On the other hand, if the concentrated water produced by the concentration method of the present invention as described above is applied to the soy sauce charge water, these problems do not occur, and various components in the seawater are uniformly concentrated, and the nutrient salts Rich concentrated water (salt concentration 7-10%) that is rich in umami ingredients such as minerals and minerals, and has good taste and flavor, rich salted soy sauce (salt concentration 6-8%) Can be purified. This is because a large salt reduction effect can be exhibited in the fermentation process.

  In addition, the low-salt soy sauce is low-salt and has a flavor, richness, or hotness comparable to or higher than that of normal soy sauce, despite being light in color. Since the light-colored soy sauce can be produced in the process of making the low-salt soy sauce without going through a special decolorization process, the productivity is excellent.

  Furthermore, the concentrated water purified by the concentration method of the present invention has the same degree of spiciness as or more than the above-mentioned normal soy sauce, and can be stored easily without requiring cooling management as a preservative measure.

(Effect when applied to vinegar seasoning)
The effect when the concentrated water of the present invention is used for, for example, a vinegar seasoning will be described. Generally, vinegar seasonings are obtained by mixing high acidity vinegar, sugar, and sun-purified salt in water. In vinegar seasonings, one index of “spiciness” is determined by the overall salt concentration.

The salt refers to NaCl contained in sun-purified salt or concentrated seawater, and other minerals such as MgCl ₂ , KCl, CaSO ₄ , and MgBr ₂ . Further, among the salts, the NaCl concentration is the salinity (NaCl) concentration.

  Here, in comparison with the “conventional vinegar seasoning mixed with concentrated seawater according to the present invention” instead of the above-mentioned water with the “conventional vinegar seasoning using only tap water”, the present invention has a predetermined “spicy” It is possible to obtain a salt reducing effect of about 10 to 20% (specifically, about 15%) compared to the conventional technology, and a mellow and plump taste compared to the conventional technology. found.

  This is because, when the salt concentration is the same as that of the prior art, abundant types of salts other than NaCl are concentrated in the concentrated seawater of the present invention at a higher rate and more uniformly than in the past.

  That is, in the present invention, since salts other than NaCl in concentrated seawater are contained, even if the amount of sun-purified salt is reduced by about 10 to 20% of the conventional amount, the vinegar seasoning has the same salt concentration. can do. This can be considered as a substitute for natural salts other than NaCl. In addition, according to this alternative, the present invention contains a larger amount of seawater minerals in a well-balanced manner, and even if the index of “spiciness” is the same as before, mellowness and the like are added to the taste.

  In addition, the numerical value of the said salt reduction effect is the component ratio of the salt in seawater (NaCl: other minerals) = (77.9: 22.1), and the component ratio of the salt in the sun refined salt (NaCl: other minerals) = (95: 5). Moreover, the predetermined salt (NaCl) density | concentration of the conventional vinegar seasoning is 10%.

  And it is the value simulated as what can obtain the equal concentration seawater of 17.0% of salinity (NaCl) density | concentration by this invention. This 17.0% is a numerical value based on the experimental result that the scale starts to precipitate when the NaCl concentration reaches 17.8% at a temperature of 90 degrees in the seawater concentrator of the present invention. This is because it is considered that concentrated seawater having a maximum NaCl concentration of about 17.0% can be obtained by continuing the control of the water level where no scale adheres.

  When such a vinegar seasoning is used as a sushi vinegar that is consumed in a relatively large amount compared to other foods, the salt reducing effect on the human body is extremely large.

  In addition, this large amount of minerals keeps the freshness of the food (color, fragrance, tightness and acidity in citrus foods), suppresses the growth of germs, and makes the meat quality, taste and flavor mellow.

  Furthermore, since a large amount of mineral can be ingested as compared with commercially available mineral-containing water, the concentrated seawater according to the present invention is also useful as a component water of seasonings.

  INDUSTRIAL APPLICABILITY The present invention can be used in various industries such as seasonings such as soy sauce and miso, food industries such as sushi and pickles (fermented foods), medical industries such as pharmaceuticals by fermentation, and beauty and health industries such as cosmetics. .

1 is a front view of a deep ocean water concentrating device according to an embodiment of the present invention. 1 is a schematic cross-sectional view of an apparatus for concentrating deep ocean water according to an embodiment of the present invention. It is a schematic sectional drawing of the deep sea water concentration apparatus of other embodiment of this invention. It is a schematic sectional drawing of the deep sea water concentration apparatus of other embodiment of this invention. It is the flowchart which showed schematic structure of the deep sea water concentration method of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Concentrator 2 Concentration tank 20 Seawater inlet 21 Pressure port 22 Peep window 23 Exhaust port 3 Heat source chamber 30 Steam port 4 Seawater injection regulator 5 Pressure regulator 50 Pressure pump 51 Pressure gauge 52 Pressure pipe 6 Steam production regulator 60 Steam Tube 7 Gas-liquid separator W Heat transfer wall B Boiler K Stirrer

Claims (8)

A concentration tank (2) provided with a space for holding seawater injected into the tank and a reduced pressure state in the upper part of the tank, and an outer peripheral surface of the concentration tank (2) via a heat transfer wall. The heat source chamber (3), which is provided in contact with the lower half, is supplied with the heat source necessary for the heat treatment, and the seawater is supplied to the upper limit less than the full tank based on the information on the water level of the seawater in the concentration tank (2). Seawater infusion adjusting device (4) for injecting into the concentrating tank (2) and a seawater concentrating device having a pressure adjusting device (5) for maintaining the space provided in the upper part of the concentrating tank (2) in a depressurized state. Because
Evaporation of seawater in the concentration tank (2) is promoted by heat treatment of the seawater in the concentration tank (2) by the heat source chamber (3) and decompression processing of the space in the concentration tank (2) by the pressure regulator (5). In addition, when the water level in the concentration tank (2) is lowered to the lower limit by promoting the evaporation of the seawater, the seawater is adjusted to the upper limit by the seawater injection adjusting device (4),
An apparatus for concentrating seawater, characterized in that water level control, to which no scale is attached due to airing, is repeated a predetermined number of times within a range between a preset upper and lower limit of the sea surface. The seawater concentration apparatus (4) is a seawater concentration apparatus according to claim 1, wherein the seawater level is controlled so that the seawater level in the concentration tank (2) is always located above the heat source chamber (3). The pressure regulator (5) comprises a pressure pump (50) connected through a pressure port (21) provided at the upper end in the concentration tank (2);
By operating this pressure pump (50), the air in the concentrating tank (2) is discharged from the pressure port (21), and the space in the concentrating tank (2) is in a reduced pressure state. Calibration occurs in a lower environment,
Also on the upper end portion of the thickening tank (2), sea water concentration apparatus of the seal pot which are connected according to claim 1 or 2 for the negative pressure maintaining. A seawater injection adjusting device (4) is provided in the concentrating tank (2), and automatically by a seal pot or a water supply electromagnetic valve based on information from a level sensor (S) that measures the water level of the injected seawater. The seawater concentration apparatus according to any one of claims 1 to 3, wherein the seawater surface is controlled and seawater replenishment is repeated. The pressure regulator (5) comprises a pressure gauge (51) connected through a pressure port (21) provided at the upper end of the concentration tank (2);
The seawater injection adjustment device (4) measures the pressure change in the concentration tank (2) based on the information from the pressure gauge (51) and grasps the upper and lower positions of the sea level in the concentration tank (2). The seawater concentration apparatus according to any one of claims 1 to 4, wherein the seawater surface is controlled. A stirrer (K) for appropriately stirring the injected seawater is provided in the central portion of the seawater injected into the concentration tank (2), and bubbles are generated in the seawater by stirring with the stirrer (K). The seawater concentration apparatus according to any one of claims 1 to 4. The stirrer (K) is capable of peeling off the scale adhering to the concentration tank (2) by injecting hot water into the concentration tank (2) and stirring during maintenance. The seawater concentration apparatus as described. In a concentration device (1) comprising a heat source chamber (3) with a heat transfer wall in the outer periphery of the concentration tank (2) holding the seawater or in the tank, the seawater is injected into the concentration tank (2) and concentrated Supplying heated steam or hot water as a heat source to the heat source chamber (3) in a state where the inside of the tank (2) is decompressed, heating the seawater in the concentration tank (2) to evaporate water in the seawater, A mode in which seawater is replenished when the water level is lowered due to evaporation of water , and the heat source chamber (3) is in contact with the substantially lower half of the outer peripheral surface of the concentration tank (2) through a heat transfer wall. The seawater injection adjustment device (4) is provided with a preset upper and lower limit of the sea level, and repeats the water level control that does not adhere to the scale by air-spreading twice to five times in advance. A method for concentrating seawater, characterized in that the remaining concentrated water is obtained.

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