KR20210029979A - Method for prepairing high density mineral nutrient salt from sea water - Google Patents

Abstract

The present invention relates to a method for preparing nutrient salt containing mineral ingredients at a high concentration. Particularly, the method includes purifying salt water concentrated in the evaporation site of a salt pond or salt water containing bay salt dissolved therein, and spraying the salt water to hot air or to the surface of a crystal plate to perform crystallization of salt in the air or on the surface of a crystal plate. In this manner, it is possible to obtain salt free from harmful substances and containing a large amount of mineral ingredients. It is also possible to utilize the existing salt pond, and to use concentrated salt water or salt water containing bay salt dissolved therein without any separate additional device or equipment, thereby reducing the costs. Further, it is possible to obtain nutrient salt containing mineral ingredients at a high concentration. The method for preparing nutrient salt containing mineral ingredients at a high concentration includes the steps of: a salt water concentration step of concentrating sea water in the evaporation site of a salt pond or preparing high-concentration salt water in which bay salt produced in a salt pond is dissolved; a salt water purification step of collecting and purifying the salt water concentrated in the evaporation site or salt water containing bay salt dissolved therein; and a salt crystallization step of spraying the purified salt water into a crystallization chamber to allow evaporation of water in the salt water and to crystalize salt.

Description

Manufacturing method of high concentration mineral nutrient salt {METHOD FOR PREPAIRING HIGH DENSITY MINERAL NUTRIENT SALT FROM SEA WATER}

The present invention relates to a method of manufacturing a high-concentration mineral nutrient salt, and more particularly, by purifying brine concentrated in an evaporation site of a salt field or brine obtained by dissolving natural sea salt, and then spraying it to the surface of a crystal plate or in the air at high temperature. By crystallizing salt, harmful substances are removed and salt containing a large amount of mineral components can be manufactured, and by using an existing salt farm and accordingly, concentrated brine or salt water dissolved in sea salt without additional equipment or facilities. The present invention relates to a method of manufacturing a high-concentration mineral nutrient salt capable of lowering the manufacturing cost and obtaining a nutrient salt containing a high-concentration mineral component.

The commonly used salt has a chemical name of sodium chloride (NaCl), and is divided into edible and industrial. The edible salt is widely used in daily life such as manufacturing and processing of food such as seasoning or salting of food at home, and industrial salt is widely used in various fields of industry.

Salt is absorbed by the human body, regulates the osmotic pressure of body fluids, is a neurostimulating substance involved in the balance of acids and bases, and constitutes a major component of digestive juices. In other words, salt is involved in all body functions such as voltage regulation of cell membranes and blood pressure regulation in the body. In particular, Na+ plays a very important role in the osmotic pressure of body fluids, maintenance of plasma volume, nerve excitement, muscle contraction, and movement of nutrients.

These salts are manufactured from seawater, rock salt, salt lake or underground water as raw materials, and can be classified into sea salt, rock salt, refined salt, or re-decontamination depending on the production method. Salt is traditionally preferred and widely used because two-thirds of the world's consumption is rock salt, but in the case of Korea, sea salt made by evaporating seawater is well harmonized with our food. In particular, seawater contains sodium chloride (NaCl) and various minerals (magnesium, gallium, potassium, etc.) that are beneficial to the human body.

The method of producing sea salt in salt fields widely used in Korea is produced by using the surface seawater of the coast under open-air conditions exposed to pollution. Therefore, salt produced in salt farms contains contaminants contained in seawater and impurities such as sand, grits, and other insoluble components. In addition, when the bottom of the salt crystallization area of the salt field is made of PVC or PP-based flooring, the PVC and PP-based flooring exposed to strong ultraviolet rays is oxidized and corroded, causing harmful ingredients unsuitable for food to elute and decompose and flow into the sea salt. There is. In addition, the method of producing sea salt in the salt farm has limitations in actively responding to the demand for high-quality salt in the rapidly growing food market due to limitations in production time and increase in production.

In order to compensate for the shortcomings of the sea salt produced in an open-air salt farm as described above, a technique of crystallizing salt by spraying seawater into a space blocked from the outside has been widely used in recent years. For example, Korean Patent Registration No. 10-1855452 (2018.04.30, a method of manufacturing high-concentration mineral nutrient salt that uses seawater to prepare salt containing minerals in a balanced manner) Korea Patent Registration No. 10-0548295 (2006.01.24, horizontally inclined slewing spray drying apparatus and manufacturing method for the production of mineral seawater) is manufactured by spraying seawater into a drying chamber and crystallizing salt in the drying chamber. Korean Patent Registration No. 10-1113348 (2012.01.31, an apparatus and method for producing salt and water or deep sea water after instantaneously crystallizing seawater or deep seawater in the air) A technology for producing salt by crystallizing salt on the surface of an impeller is disclosed.

However, as described above, the conventional technology of spraying seawater into a crystal plate or drying chamber to determine salt still uses seawater in a state in which harmful substances contained in seawater have not been removed.Therefore, the manufactured salt still contains harmful components. In addition, there is a problem that the content of the mineral component is not sufficient.

In addition, in the case of using seawater as it is in the prior art, salt production efficiency is lowered due to the low salinity of the seawater, and a lot of energy is consumed for evaporation of moisture. To solve this problem, separate treatment by using additional equipment for concentrating seawater. It has the disadvantage that it must be done.

Republic of Korea Patent Registration No. 10-1855452 (2018.04.30): Manufacturing method of high-concentration mineral nutrient salt using seawater to prepare salt containing minerals in a balanced manner Republic of Korea Patent Registration No. 10-0548295 (2006.01.24): Horizontally inclined orbiting spray drying device and manufacturing method for the production of mineral seawater salt Republic of Korea Patent Registration No. 10-1113348 (2012.01.31): An apparatus and method for producing salt and water or deep sea water after instantaneously crystallizing seawater or deep seawater in the air

The present invention was conceived by recognizing the above points, and an object of the present invention is to purify the salt water concentrated in the evaporation site of the salt field or the salt water in which the sea salt was dissolved, and then spray it into the hot air or the surface of the crystal plate in the air or on the surface of the crystal plate. By crystallizing salt in, harmful substances are removed, and salt containing a large amount of mineral components can be manufactured, as well as using an existing salt farm, and accordingly, concentrated brine or brine dissolved with sea salt without additional equipment or facilities is used. By doing so, it is possible to not only lower the manufacturing cost, but also to provide a method of manufacturing a high-concentration mineral nutrient salt capable of obtaining a nutrient salt containing a high-concentration mineral component.

In order to achieve the above object, the method for preparing a high-concentration mineral nutrient salt according to the present invention includes a brine concentration step of concentrating seawater in an evaporation site of a salt field or preparing a high-concentration brine obtained by dissolving the sea salt produced in the salt field, and evaporation. It comprises a brine water purification step of collecting and purifying brine concentrated brine or brine obtained by dissolving sea salt from the ground, and a salt crystal step of evaporating water in the brine by spraying the purified brine into the crystal chamber to determine salt. It is done.

In addition, the method for producing a high-concentration mineral nutrient salt according to the present invention is characterized in that the brine water purification step includes a centrifugal separation step of separating and removing solid sludge contained in the brine using a decant centrifuge.

In addition, the method for producing a high-concentration mineral nutrient salt according to the present invention is characterized in that the brine water purification step includes a filtering water purification step of filtering the brine from which solid sludge has been removed with an ultrafiltration membrane to purify it.

In addition, the method for producing a high-concentration mineral nutrient salt according to the present invention is characterized in that the brine water purification step includes a filtering water purification step of purifying the brine by filtering it through an ultrafiltration membrane.

In addition, the method of manufacturing a high-concentration mineral nutrient salt according to the present invention is characterized in that, in the salt crystallization step, hot air is supplied to the crystal chamber.

In addition, the method of manufacturing a high-concentration mineral nutrient salt according to the present invention is characterized in that a heated crystal plate is provided in the crystal chamber, and in the salt crystallization step, brine is sprayed onto the surface of the crystal plate.

In addition, in the method of manufacturing a high-concentration mineral nutrient salt according to the present invention, a spinning machine having a spray hole formed at an edge thereof is rotatably provided inside the crystal chamber, and in the salt crystal step, salt water is introduced into the spinning machine and the spinning machine It is characterized in that it is injected into the crystal chamber through the injection hole by centrifugal force by rotation.

According to the above configuration, the method for producing a high-concentration mineral nutrient salt according to the present invention purifies the brine concentrated in the evaporation site of the salt field or the brine obtained by dissolving the natural sea salt, and then sprays it into the high-temperature air or the surface of the crystal plate in the air or on the surface of the crystal plate. By crystallizing salt, harmful substances are removed and salt containing a large amount of mineral components can be manufactured, and by using an existing salt farm and accordingly, concentrated brine or salt water dissolved in sea salt without additional equipment or facilities. Not only can the manufacturing cost be lowered, but also it has the advantage of obtaining a nutrient salt containing a high concentration of minerals.

Moreover, the method of manufacturing a high-concentration mineral nutrient salt according to the present invention removes harmful substances using high-concentration brine or sea salt produced in a salt field, and produces nutrient salt containing a high-concentration mineral component. Not only is it highly likely to be contained, but as the sea salt is stored for a long time in a salt warehouse, minerals that are beneficial to the human body are reduced, which has the advantage of solving the problem of the salt farm, which has deteriorated profitability due to poor marketability.

1 is a flow chart showing a method of manufacturing a high-concentration mineral nutrient salt according to an embodiment of the present invention
Figure 2 is a flow chart showing a brine water purification step in the method for producing a high-concentration mineral nutrient salt according to an embodiment of the present invention
3 is a flow chart showing a salt crystallization step in a method of manufacturing a high-concentration mineral nutrient salt according to an embodiment of the present invention
4 is a diagram conceptually showing a salt manufacturing facility used in a method of manufacturing a high-concentration mineral nutrient salt according to an embodiment of the present invention
FIG. 5 is a diagram conceptually showing a first example of a salt determination apparatus of a salt manufacturing facility used in a method of manufacturing a high-concentration mineral nutrient salt according to an embodiment of the present invention
6 is a view conceptually showing a second example of a salt determination device of a salt manufacturing facility used in the manufacturing method of high-concentration mineral nutrient salt according to an embodiment of the present invention
FIG. 7 is a diagram conceptually showing a third example of a salt determination device of a salt manufacturing facility used in a method of manufacturing a high-concentration mineral nutrient salt according to an embodiment of the present invention

Hereinafter, a method of manufacturing a high-concentration mineral nutrient salt according to the present invention will be described in more detail with reference to the drawings and examples.

1 is a flowchart illustrating a method of manufacturing a high-concentration mineral nutrient salt according to an embodiment of the present invention, and FIG. 2 is a flowchart illustrating a brine water purification step in a method of manufacturing a high-concentration mineral nutrient salt according to an embodiment of the present invention. 3 is a flow chart showing a salt determination step in a method of manufacturing a high concentration mineral nutrient salt according to an embodiment of the present invention, and Figure 4 is used in a method of manufacturing a high concentration mineral nutrient salt according to an embodiment of the present invention It is a diagram conceptually showing a salt manufacturing facility, and FIG. 5 is a diagram conceptually showing a first example of a salt determination device of a salt manufacturing facility used in a method of manufacturing a high-concentration mineral nutrient salt according to an embodiment of the present invention 6 is a view conceptually showing a second example of a salt crystallization apparatus of a salt manufacturing facility used in a method of manufacturing a high-concentration mineral nutrient salt according to an embodiment of the present invention, and FIG. 7 is an embodiment of the present invention. It is a diagram conceptually showing a third example of a salt crystallization apparatus of a salt manufacturing facility used in the manufacturing method of high-concentration mineral nutrient salt according to the example.

A method of preparing a high-concentration mineral nutrient salt according to an embodiment of the present invention is characterized in that it uses brine concentrated in an evaporation site of a salt field or a high-concentration brine obtained by dissolving the sea salt produced in a salt field. The method of manufacturing a high-concentration mineral nutrient salt according to an embodiment has the advantage of utilizing an existing salt farming facility.

In addition, the method of manufacturing a high-concentration mineral nutrient salt according to an embodiment of the present invention includes not only harmful substances such as fine plastics contained in the seawater itself by purifying high-concentration brine, but also the process of concentrating it into brine in the salt evaporation site. It has the advantage of manufacturing excellent quality salt by removing contaminated harmful substances or harmful microorganisms in the process of being determined as natural sea salt.

In addition, the method of manufacturing a high-concentration mineral nutrient salt according to an embodiment of the present invention is configured such that the brine is determined as salt while in contact with air in the crystal chamber, so that salt containing various minerals can be prepared by contact with air. Has an advantage.

The method of manufacturing a high-concentration mineral nutrient salt according to the present invention having the above characteristics is characterized in that it comprises a brine concentration step (S10), a brine water purification step (S20), and a salt determination step (S30). The method of manufacturing a high-concentration mineral nutrient salt configured as described above is performed in a salt manufacturing facility shown in FIG. 4, hereinafter, a salt manufacturing facility shown in FIG. 4 is used. The method of manufacturing a high-concentration mineral nutrient salt according to the present invention is described in detail. I will explain it clearly.

The brine concentrating step (S10) is a step of preparing high-concentration brine by concentrating seawater in an evaporation site (F) of a salt field.

In the present invention, the existing salt plant facilities can be used as it is by collecting and using seawater from the evaporation site 11 of the salt field (11) or the salt water storage tank (not shown in the figure). In the salt field (1), the seawater is concentrated in the evaporation site for 1 to 3 times, and the salt concentration in the 3rd evaporation site and the brine storage tank is usually about 25 to 28%. The present invention can be configured to use the salt water by dissolving the sea salt produced in the salt field 1 and stored in the salt storage 12 to prepare a high concentration of salt water, and thus, the present invention is possible without long-term storage of the sea salt. By using the sea salt in a short time, it has the advantage of preventing the mineral content from dropping due to the loss of minerals due to the discharge of bitter water by storing the sea salt for a long time in the salt warehouse 12. The concentration of the sea salt dissolved in the sea salt is evaporated. It is preferable that the concentration of the brine concentrated in the pond (25 ~ 28%) is similar or higher, and the brine obtained by dissolving the sea salt is used as it is or mixed with the brine collected from the evaporation area 11 of the salt field. In addition, the sea salt may be dissolved by being added to the brine collected from the evaporation paper 11.

The present invention makes it possible to reduce the thermal energy required for salt crystallization by using the brine concentrated in the evaporation pond 11 as described above, and also the process or the crystallization paper ( In the process of determining the sea salt in (not shown in the figure), it is possible to use salt water containing various mineral components from the seawater pearl.

The brine water purification step (S20) is a step of collecting and purifying brine from an evaporation pond (F) of a salt field or a brine storage tank (not shown in the drawings).

Due to recent marine pollution, the seawater itself contains a lot of microorganisms or substances harmful to the human body, and even in the process of concentrating seawater in the seawater, not only minerals that are helpful to the human body but also components harmful to the human body are included in the brine.

The present invention is characterized in that such salt water is purified to remove components harmful to the human body. In particular, the present invention is characterized in that it is configured to facilitate maintenance of water purification equipment while completely removing harmful substances contained in brine through the two-stage water purification process of the centrifugal separation step (S21) and the filtered water purification step (S22). do.

The centrifugal separation step (S21) is a step of separating fine particulate matter such as mud particles or fine plastic particles contained in salt water. In the present invention, in the centrifugal separation step (S21), the solid sludge contained in the brine is separated from the brine by introducing the brine sucked from the salt field by the pump (P) into a two-phase decant centrifuge (2) that separates the solid phase and the liquid phase. Separate and remove from liquid. When the collected brine is introduced into the rotor blow (Bowl) of the two-phase decant centrifuge (2), the solid sludge (Ss) is separated by the screw and discharged to the sludge outlet (21) by centrifugal force, and the sludge is separated. The brine separation liquid (Sl) is discharged through the separation liquid outlet (22) and is introduced into the ultrafiltration device (3). The present invention not only efficiently removes solids by the centrifugal separation step (S21), but also can minimize clogging of the ultrafiltration membrane by solids in the filtration water purification step (S22), which is a post-process, by removing these solids. ) Will be able to reduce the maintenance cost.

The filtering water purification step (S22) is a step of filtering and purifying brine from which solid sludge has been removed by an ultrafiltration device 3 using an ultrafiltration membrane. The ultrafiltration membrane does not filter beneficial substances such as minerals and removes impurities such as bacteria, viruses and particulates.

On the other hand, in the method for producing a high-concentration mineral nutrient salt according to the present invention, the brine water purification step (S20) is configured to sequentially undergo both the centrifugal separation step (S21) and the filtering water purification step (S22), as well as the centrifugal separation step (S21). ) Or may be composed of only one of the filtering water purification step (S22). 2 is a flowchart conceptually showing that the centrifugal separation step (S21) and the filtered water purification step (S22) can be selected as necessary as described above.

In the salt crystallization step (S30), the purified brine is sprayed into the crystal chamber 51 of the crystallizer 5 to evaporate moisture in the brine to obtain salt (S) precipitated as crystals. The present invention is characterized in that the salt is determined in contact with the air by spraying brine into the air, so that the minerals contained in the brine are not lost, so that salt containing minerals of a high concentration (mineral content of 15% or more) can be obtained. .

4 and 5, the crystal apparatus 5 for determining salt (S) from the brine is a crystal chamber 51 forming a space in which salt is determined, and into the crystal chamber 51. It consists of a spray nozzle 52 for spraying salt water, and a hot air supply 53 for supplying hot air into the crystal chamber 51.

As shown in the drawing, the crystal chamber 51 may be formed in a cylindrical tank shape as well as a general hexahedral passage. The salt (S) determined and precipitated in the air of the crystal chamber (51) falls under the weight of the crystal chamber (51), and the dropped salt (S) is collected through the salt outlet (51a). It is discharged into the container. The hot air blown into the crystal chamber 51 and moisture evaporated by the hot air are discharged to the outside through an exhaust port 51b connected to the crystal chamber 51. Usually, the precipitated salt (S) falls inside the crystal chamber 51, so the salt outlet (51a) is formed in the lower portion of the crystal chamber (51), conversely, the exhaust port (51b) through which hot air containing moisture escapes. ) Is formed on the crystal chamber 51.

The spray nozzle 52 is a configuration for spraying salt water into the crystal chamber 51 in the form of fine particles. In the present invention, it is possible to control the size of the salt grains precipitated as crystals by varying the size of the grains of the salt water sprayed from the spray nozzle 52. For example, when salt water is sprayed with fine particles from the spray nozzle 52, salt is precipitated in the form of powder, and when the salt water is sprayed with relatively large water droplets from the spray nozzle 52, the salt is about grains of sand. It precipitates with a particle size of.

The hot air supply 53 is configured to supply hot air into the crystal chamber 51. The hot air blown from the hot air supply 53 to the inside of the crystal chamber 51 is blown at a temperature of about 50 to 150°C, and the salt water sprayed into the crystal chamber 51 by the hot air contains moisture. As it evaporates, it precipitates as salt (S). The temperature of the hot air varies depending on the time during which the salt water particles sprayed into the air from the inside of the crystal chamber 51 stay in the air, and the size of the sprayed salt water particles. For example, when brine is sprayed as fine particles into the crystal chamber 51, and the sprayed brine particles are dropped while staying in the crystal chamber 51 for a long time, the temperature of the hot air is supplied at about 50°C. Suffice. Meanwhile, the hot air supply 53 is connected so that the hot air blown into the crystal chamber 51 by the hot air supply 53 flows while forming a vortex T in the crystal chamber 51. It is preferable that it is configured so that sufficient heat is supplied to the entire interior space of 51.

On the other hand, in order to evaporate the moisture of the brine for salt crystallization, a lot of heat must be applied to the brine, and the hot air containing moisture exhausted from the crystal apparatus 5 to the outside has a lot of energy. In the present invention, hot air containing moisture discharged from the exhaust port 51b of the crystal chamber 51 of the crystal apparatus 5 and brine supplied to the crystal apparatus 5 so as to be sprayed from the inside of the crystal chamber 51 It is characterized in that it is configured to reduce energy consumption by preheating the brine by performing heat exchange therebetween. Referring to the drawings, a heat exchange device 4 for heating brine flowing into the crystal device 5 through the ultrafiltration device 3 with exhausted hot air is provided with the ultrafiltration device 3 and the determination device ( 5) It is provided between. In the heat exchange device 4, the heat of the hot air exhausted from the crystal chamber 51 is transferred to the brine introduced into the determination device 5 to increase the temperature of the brine, and accordingly, the determination device 5 As the temperature of the brine increases, it is possible to reduce the thermal energy required to evaporate water for crystallization of salt, and as a result, it is possible to supply hot air blown into the crystal chamber 51 at a lower temperature. In particular, in the heat exchange device 4, as the hot air containing moisture is cooled, the moisture is condensed and discharged to the condensing liquid L, and the latent heat by the condensation is used to heat the brine as it is.

Meanwhile, the hot air exhausted from the crystal chamber 51 of the crystal apparatus 5 may be discharged to the outside as it is, but the hot air may contain fine grained salt crystals. Accordingly, the present invention is provided with a microcrystalline recovery device 8 for recovering the fine crystals (S') of salt contained in the form of fine particles in the hot air exhausted from the crystal chamber 51. Referring to the drawings, in the microcrystalline recovery device 8, the hot air discharged through the exhaust port 51b of the crystal chamber 51 is introduced and the flow rate is reduced, so that the microcrystal S'falls downward and the hot air is It is composed of a cyclone-type chamber that separates and collects fine crystals S'as a result of rising upward while forming a vortex T'.

As described above, the hot air exhausted from the crystal chamber 51 can be discharged to the heat exchanger 4 as it is, as well as the heat exchange through the microcrystalline device 6 to recover the fine crystals (S'). It can be discharged to the device (4). As described above, an exhaust damper 53 for adjusting the hot air discharge direction to selectively discharge the hot air from the exhaust port 51b of the determination chamber 51 is mounted on the exhaust port 51b.

On the other hand, the salt determination step (S30) is a method of evaporating moisture with hot air by spraying brine into the interior space of the crystal chamber as shown in FIG. 3 ('intrachamber spraying' in FIG. 3), provided inside the chamber and heated. A method of evaporating water by spraying brine on the surface of the crystal plate ('spray on the surface of the crystal plate' in Fig. 3) and a method of evaporating moisture by spraying the salt water into the crystal chamber in a spinning method by centrifugal force ('radiator injection' in Fig. 3) ) Can be used. The'intrachamber injection' shown in FIG. 3 is performed by the crystal apparatus 5 according to the first example shown in FIGS. 4 and 5, and the'crystal plate surface injection' shown in FIG. It is made by the determination device 6 according to the second example, and the'radiator injection' shown in FIG. 3 is performed by the determination device 7 according to the third example shown in FIG. 7. Since the determination device 5 according to the first example shown in FIGS. 4 and 5 has already been described above, the determination devices 6 and 7 according to the second example and the third example shown in FIGS. 6 and 7 will be described below. Let me explain.

The crystal apparatus 6 according to the second example illustrated in FIG. 6 is a method of spraying salt water onto the heated crystal plate 62 so that the water of the salt water in contact with the crystal plate 62 is rapidly formed. Referring to the drawings, the crystal apparatus 6 according to the second example illustrated in FIG. 6 includes a crystal chamber 61 for forming a space in which salt S is determined and moisture is evaporated, and the crystal chamber 61 A crystal plate 62 provided inside of the crystal plate 62, a spray nozzle 63 for spraying salt water to the upper portion of the crystal plate 62, and a hot air supply device 64 for supplying hot air into the crystal chamber 61 are provided. It is equipped and configured. The crystal plate 62 is heated to a temperature of 150 to 200° C. by a heating means (not shown in the drawing) such as an electric heater, and heat transfer occurs rapidly between the salt water in contact with the surface and the crystal plate 62 Because of this, salt crystallization is made rapidly. The crystal plate 62 may be made of a metal material such as copper or a material such as ceramic having excellent corrosion resistance, chemical resistance, and heat resistance. In particular, it is preferable that the surface of the crystal plate 62 is formed of a ceramic material having water repellency so that the salt water sprayed on the surface of the crystal plate 62 flows without being attached to the surface of the crystal plate 62 by surface tension.

The crystal apparatus 7 according to the third example shown in FIG. 7 is a method in which the salt water is sprayed into the crystal chamber 71 by spinning by centrifugal force to be determined. Referring to the drawings, the crystal apparatus 7 according to the third example illustrated in FIG. 7 includes a crystal chamber 71 for forming a space in which salt S is determined and moisture is evaporated, and the crystal chamber 71 The spinning machine 72 for injecting the brine injected into the spinner by spinning by centrifugal force while rotating in the inside of the spinning machine 72, the supply pipe 73 for supplying the brine to the top of the spinning machine 72, and the crystal chamber 71 A hot air supply unit 74 for supplying hot air into the interior is provided and configured.

As described above, the radiator 72 is a device for radiating salt water to its periphery while being rotated, and the lower plate 721 has an edge to cover the peripheral edge of the lower plate 721 and the lower plate 721. The skirt 722 abuts against the edge of and the bottom plate 721 and the skirt 722 abut and a jet hole 723 formed in a radial direction so that salt water passes through the combined edge, and one end of the bottom A rotation shaft 724 connected to a position of the rotation center of the plate 721 and rotated supported by the spinning chamber 71, and a driving motor 725 connected to the other end of the rotation shaft 724 to rotate the rotation shaft 724 ) Is provided. The radiator 72 configured as described above is mounted on the crystal chamber 71 such that the rotation shaft 724 is located at the center of the crystal chamber 71, and the lower plate 721 is provided by the supply pipe 73. ), the salt water injected into the upper portion of the lower plate 721 receives a centrifugal force by rotation of the lower plate 721 and flows in the direction of the edge where the harb plate 721 and the skirt 722 are combined, and the collected salt water is collected by the centrifugal force. It is radiated through 723 and is sprayed into the crystal chamber 71. The lower plate 722 is provided with a heating means (not shown in the drawing) such as an electric heater so that the brine introduced into the radiator 72 can be heated by the radiator 72.

The method for calculating the risk of marine accidents using the density of a ship proximity accident described above and illustrated in the drawings is only one embodiment for carrying out the present invention, and should not be construed as limiting the technical idea of the present invention. The scope of protection of the present invention is determined only by the matters described in the following claims, and the improved and modified embodiments without departing from the gist of the present invention are apparent to those of ordinary skill in the art. As long as it will be said to belong to the protection scope of the present invention.

1 salt pan
11 evaporation paper
2 2-phase decant centrifuge
21 sludge outlet
22 Separated liquid outlet
3 Ultrafiltration device
4 heat exchanger
5 Determination device according to Example 1
51 crystal chamber
52 spray nozzle
53 Hot Air Supply
6 Determination device according to Example 2
7 Determination device according to Example 3
8 Fine crystal recovery device

Claims (7)

A brine concentration step of concentrating seawater in an evaporation site of a salt field or preparing a high-concentration brine obtained by dissolving the sea salt produced in the salt field;
A brine water purification step of collecting and purifying brine concentrated brine or brine obtained by dissolving sea salt from the evaporation site, and
A method of producing a high-concentration mineral nutrient salt comprising a salt crystal step of spraying purified brine into the crystal chamber to evaporate moisture in the brine to determine salt. The method of claim 1,
The brine water purification step includes a centrifugal separation step of separating and removing solid sludge contained in the brine using a decant centrifuge. The method of claim 2,
The brine water purification step includes a filtering water purification step of filtering the brine from which the solid sludge has been removed with an ultrafiltration membrane to purify the high concentration mineral nutrient salt. The method of claim 1,
The brine water purification step includes a filtering water purification step of filtering the brine with an ultrafiltration membrane to purify the high concentration mineral nutrient salt. The method according to any one of claims 1 to 4,
The salt crystallization step is a method for producing a high-concentration mineral nutrient salt, characterized in that hot air is supplied to the crystal chamber. The method according to any one of claims 1 to 4,
A heated crystal plate is provided inside the crystal chamber,
The salt crystallization step is a method for producing a high-concentration mineral nutrient salt, characterized in that the brine is sprayed onto the surface of the crystal plate. The method according to any one of claims 1 to 4,
Inside the crystal chamber, a radiator having an injection hole formed at an edge thereof is rotatably provided,
In the salt crystallization step, brine is injected into the spinning machine and sprayed into the crystal chamber through the injection hole by a centrifugal force by rotation of the spinning machine.

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