KR101844827B1 - Method of extracting calcium salt, natrium salt, magnesium salt and potassium salt from seawater, and its products - Google Patents

Abstract

The present invention relates to a method and an apparatus for separating sodium, magnesium, calcium and potassium, which are useful minerals in seawater, and more particularly to a method and apparatus for separating calcium, , Sodium, magnesium, and potassium. When the present invention is used, it is possible to separate and extract various useful minerals by a simple facility without reducing the scale coming from the attachment of calcium, deterioration of the facilities, and efficiency, and drying of the products produced without a separate drying device is also possible

Description

Methods for selectively separating and extracting calcium salts, magnesium salts, potassium salts, and sodium salts from seawater using the difference in crystallization time of minerals according to changes in the concentration of seawater, magnesium salt and potassium salt from seawater, and its products}

Until now, the salt has been produced mainly in sodium chloride centered on salty salt of salt, purified salt using mechanical equipment, self-potting using flat pot, and rock salt as minerals. As such, it has been revealed that the salt product is thin and the ingredient is also centered on sodium, so it can not meet the needs of various consumers.

The present invention relates to a new technique for producing a salt in a stable manner, which contains a large amount of a specific mineral component by the concentration step, using different characteristics of the crystallization period of the mineral elements contained in seawater as the seawater is concentrated And a method for producing a salt with enhanced specific mineral components produced using these components.

Salt is sodium chloride. Has long dominated the formula. In recent years, salt has been found to contain calcium (calcium chloride, calcium carbonate, calcium sulfate), magnesium (magnesium chloride, magnesium sulfate) and potassium (potassium chloride) in addition to sodium chloride. Is not easily changed. The salt content of most salt is more than 90% (salt content of salt is more than 70%). However, except for the actual water content, sodium chloride (sodium chloride) The content is well over 90%.

In other words, it is the reality now that salt in the center of sodium chloride dominates the whole salt industry. This reality has reduced the choice of consumers, and due to the narrow recognition of salt standards and salinity, and the lack of technology to extract components other than sodium chloride, various minerals contained in seawater are not utilized as salt products It is being abandoned.

For example, in case of salt production, the seawater in the west coast is drawn up and concentrated in multiple stages. After reaching a certain salinity, the salt is transferred to a crystal to crystallize sodium chloride and then extracted and commercialized.

When making this salt, the beneficial minerals such as calcium, magnesium and potassium which are beneficial to our body are only contained in salt and are thrown into the sea.

Calcium that crystallizes at low concentration is crystallized at the stage before reaching the crystal ground and is not contained in the salt and is thrown to the bottom of the concentrate. Minerals such as magnesium and potassium are removed from the crystallized salt and remain in the remaining water .

The minerals buried in the salt are also stored under the name of removing the jewels and discarded while the jewels are removed.

Despite the usefulness of these ingredients, there are many reasons for making salt in a way that does not include them in the product, because they have not overcome the problems of sodium chloride and the minerals contained in seawater.

When calcium is crystallized and aggregated, it scales to make it difficult to operate the equipment and reduce efficiency. Since magnesium has a tendency to taste when the content of magnesium is high and storage and handling are not easy due to hygroscopicity of absorbing water, inclusion of magnesium in the product causes many inconveniences and problems.

For this reason, studies on the preparation of salt have proceeded to develop a convenient method of producing sodium chloride-based salt, just as in the case of the above-mentioned example of the salt of the sun.

It is cheaper and more profitable to provide consumers with salt that is easy to make, convenient to carry and store, and just meets salty taste, rather than increasing the amount of other useful minerals other than sodium chloride or thinking of consumers' health. Because.

Composition ratio by salt type division Sun salt Purified salt Regurgitant Import salt Nacl 80 ~ 85 99 88 99.2 to 99.7 Ca 0.2 0.1 0.1 to 0.15 0.03 to 0.05 Mg 0.5 to 1.0 0.2 0.2 to 0.5 0.013 to 0.035 SO4 1.0 to 1.5 0.4 0.4 to 0.8 0.13 to 0.15 K 0.1 to 0.17 0.1 0.1 0.01 to 0.02 moisture 8-12 0.3 9 0.2 to 0.25

 Though we usually eat salt from the center of sodium, depending on the season, depending on the amount of sunlight, the strength of the wind, the content of ingredients, content, and particle size is slightly different.

Due to these differences in quality, consumer complaints about salt products are also high. The salt is different and the kimchi is tasteless. And so on are problems that arise because salt products are different from each other and can not catch the saltiness.

In addition, the problem of pollution of seawater in the west coast due to industrialization of China is getting worse. Environmental hormone problems coming out of the ground of the decision paper, the problem of dust blowing in the wind, and the problem of foreign matter coming from the settling of the flyworms remain to this day.

The use of factory facilities to produce salt for tablets has its own problems as well. In the process of filtering the seawater by using the sand filtration membrane and passing through the ion exchange membrane, there is a problem that the cleanliness is secured to some extent but the other minerals other than sodium chloride are hardly contained.

Comparison of electrolytes in seawater, plasma, interstitial fluid, amniotic fluid, tissue fluid, and intracellular fluid (mEq / L) division Na ⁺ K ⁺ Ca ^{2 +} Mg ^{2 +} Cl ^- HCO ₃ ^- HPO ₄ ^{2 -} Seawater 456 9.7 10 55.6 536 - - Plasma 142 5 5 3 103 27 2 Interstitial fluid 138 5 5 3 108 27 2 Amniotic fluid 127 4 4 1.4 106 - - Intracellular fluid 14 157 0 26 0 10 110

Minerals play a very important role in our bodies, as shown in Table 2. Without these minerals, we can not operate normally. Therefore, we should pay much attention to minerals other than sodium chloride, and we should strive to consume high quality minerals.

The role of major minerals in our bodies  division Role in human body Symptoms of shortage Ca ⁺⁺ Bone and tooth formation
Control of muscle, nerve and cardiac function
Promote blood clotting Constipation, osteoporosis
Developmental disorder, neuropathy
Convulsions, cavities Mg ⁺⁺ Energy generation function
Neural control function
Promoting Vitamin B, E metabolism Heart disease arrhythmia
Hypertension, myalgia
Insomnia, anemia Na ⁺ Coordination of neural and muscular activities
Balance osmotic pressure of body fluids
Bactericidal and digestive action in gastrointestinal tract High blood pressure
Myocardial infarction
Heart failure K ⁺ Intracellular acid, base balance control
Moisture control, maintenance of nerve function
Cell function expansion Arrhythmia, loss of appetite
Muscle spasms, constipation, fatigue,
Asthenia, hypoglycemia 1 day
Intake Ca ⁺⁺ : 700 to 800 mg / day Mg ⁺⁺ : 280 to 350 mg / day
Na ⁺ : 1.1 to 1.5 g / day K ⁺ : 4.7 g / day

These minerals are abundantly dissolved in seawater, and we supplement them in the form of a product called salt. Currently, we are taking sodium chloride as a center, but potassium, magnesium and calcium are also very necessary substances for our bodies. It is very beneficial to be able to separate these materials from seawater and consume them. Until now, however, it has been only a few days to include it in salt or separate extraction from seawater and make it into a product.

The present invention solves this problem and makes it possible to produce a salt having a stable quality and a salt with a specific mineral enriched therein and use it in a necessary place. For example, magnesium-enriched salt, magnesium-enriched salt, which is needed to chop kimchi, calcium-enriched salt, which is calcium-enriched to immerse the kimchi in order to enhance storage. Magnesium-enriched bath salts to enhance skin beauty and hair enhancement, and sodium-fortified salt to cut fish.

The aim is to produce salt for specific purposes using new technologies and sanitary manufacturing processes and clean ocean deep seawater.

It is aimed at separating all the minerals of seawater selectively and making it salt product so that diversity of salt can be secured by using new technology and consumers' choice can be expanded through production of various products.

Minerals that differ according to the concentration of seawater division Density (specific gravity) Calcium crystal
(Calcium carbonate,
Calcium sulfate) Sodium chloride
decision Magnesium crystal
(Magnesium chloride, magnesium sulfate) Potassium crystal
(Potassium chloride) Amount contained in seawater 1.0245 1.4339 25.8120 5.5288 0.7121 Second concentration determination 1.1864 1.1290 - 0.044 - Total crystal extract 1.1290 - 0.044 - 3rd concentration determination 1.2512 0.2933 22.0377 0.8789 0.0941 Total crystal extract 1.4223 22.0377 0.9229 0.0941 4th concentration process 1.2924 or higher 0.0116 3.7743 4.6060 0.6180 Total extract total 1.4339 25.8120 5.5339 0.7121 Percentage of minerals in total (determined by magnetic field) determined at the core concentration stage 79% extraction for second concentration 85% extraction for the third concentration 83% extraction in the fourth concentration 87% extraction in the fourth concentration

As the concentration of water increases, the mineral components contained in the seawater are crystallized as shown in Table 4 above. As shown in the above Table 4, it is a key content of the present invention to separate and extract each of the minerals using the difference of the central minerals crystallized at each step, thereby preparing a salt centered on these minerals.

In other words, when the second concentration crystallization proceeds, more than 79% of calcium is crystallized and separated. In the third crystal, more than 85% of sodium chloride is crystallized and separated. Magnesium crystallizes 83% at the time of the fourth determination and also 87% crystallizes at the time of the fourth determination of the potassium chloride. Using this principle, it becomes possible to manufacture calcium salt, sodium salt, magnesium salt, and potassium salt, which are the major components of calcium.

More specifically, it is possible to separate and extract 79% of the calcium contained in the seawater in the second concentration determination. At the moment of this process, it is possible to extract calcium with high purity since sodium is not yet crystallized.

The same is true for the tertiary enrichment process. In this process, most of sodium in seawater can be extracted. In this process, most of the calcium is already extracted and magnesium and potassium are still before the crystallization, so it is possible to extract high purity sodium salt.

The same effect is obtained in the case of the fourth concentration process. Since most of the calcium and sodium components have already been extracted, it is possible to extract high purity magnesium and potassium salts. The separation of the extracted magnesium salt and potassium salt can be relatively easily separated by using a temperature difference or the like. However, in the case of the fourth concentration process, the amount of seawater supplied to the first process is almost evaporated. Therefore, it is effective to collect several steps and collect all at once.

The unique properties of these seawater minerals are well known, but it has not been attempted to control them in the salt production process, to separate them into minerals, or to make certain mineral-enriched products and then to use them for edible purposes.

It has long been an attempt to separate and extract the minerals contained in seawater chemically and make them useful products.

The main elements contained in seawater and their average concentrations element
sign Average concentration
mg / l element
sign Average concentration
mg / l element
sign Average concentration
mg / l element
sign Average concentration
mg / l O 857,000 Ba 0.03 CD 0.00011 Au 0.000004 H 108,000 In << 0.02 Co 0.0001 Re 0.000004 Cl 19,000 Al 0.01 W 0.0001 Dy 0.0000029 Na 10,500 Fe 0.01 Ge 0.00006 Pr 0.0000026 Mg 1,350 Zn 0.01 Xe 0.000052 Ta <0.0000025 S 885 Mo 0.01 Th 0.00005 Gd 0.0000024 Ca 400 U 0.003 Cr 0.00005 Er 0.0000024 k 380 Cu 0.003 Sc 0.00004 Yb 0.000002 Br 65 As 0.003 Ag 0.00004 Sm 0.0000017 Sr 8.5 Kr 0.0025 Hg 0.00003 Ho 0.00000088 B 4.6 Ni 0.002 Pb 0.00003 Be 0.0000006 Si 3.0 Mn 0.002 Ga 0.00003 Lu 0.00000048 C 2.8 V 0.002 Zr 0.000022 Eu 0.00000046 F 1.3 Ti 0.001 Bi 0.000015 Tm 0.00000025 Ar 0.6 Sn 0.0008 La 0.000012 Tb 0.0000001 N 0.5 Sb 0.0005 Nb 0.00001 Pd 0.00000005 Li 0.17 Cs 0.0005 Ti <0.00001 Te 0.00000001 Rb 0.12 Se 0.0004 Nd 0.0000092 Pa 0.000000002 P 0.07 Y 0.0003 Hf <0.000008 Ra 0.0000000001 I 0.06 What 0.00014 He 0.0000069 Rn 0.0000000000000006 Ce 0.0000052

As a part of the chemical industry, the industries that utilize the components contained in the seawater by adding various chemical components and utilizing them have developed around developed countries. The Solvay method, the Leblan method, the Nigerian industry in Japan, and the rare metal extraction industry such as lithium, which has been booming in recent years, are the industries that extract and utilize seawater's elements through chemical processes .

In fact, salt is a necessary substance for mankind to be used in more than 14,000 products. Hydrochloric acid and sodium hydroxide, which are the bases of the chemical industry, acid and alkaline, are products based on salt. Another chemical, vinyl (vinyl chloride), is also a product of salt chlorine. In addition, various products that we use in our daily life are extracted from seawater or produced by using seawater.

Although the elements contained in seawater are extracted and used in various ways like this, it is very difficult to find out if they are used for food, except for salt.

 Elements used in food additives and industrial products in combination with sodium Sodium benzoate, sodium benzoate, sodium benzoate, sodium benzoate, sodium benzoate, sodium benzoate, sodium benzoate, sodium benzoate, sodium benzoate, sodium glutamate, sodium nitrite, sodium erythorbate, sodium oxygen phosphate, sodium carbonate, sodium hydrogen carbonate, sodium hydroxide, Sodium metabisulphite, sodium pyrophosphate, sodium pyrophosphate, sodium ferric pyrophosphate, sodium ferric phosphate, sodium aluminum phosphate, basic aluminum sodium phosphate, sodium selenite, sodium nitroprusside sodium, sodium peroxodisulfate, sodium borate, sodium benzoate, sodium nitrate , Sodium sulphate, sodium ascorbylate, sodium citrate, sodium mannonite complex, sodium aluminosilicate complex, sodium chloride, sodium sodium nitrate, sodium sodium sulphate, dibasic sodium sulphate, sodium sulphate, sodium sulphate, sodium lactate , Sodium dehydroacetate, sodium chlorite, sodium benzoate, saccharine Na Cerium, sodium propionate ...

As shown in Table 6 above, sodium salt of sodium is combined with various elements and is widely used as chemical additives in food additives.

In fact, salt is a very stable substance. There is almost no change even if it is left at room temperature, and there is neither chemical reaction nor decay. Also, if you put it in water, it will be absorbed in your body while it is being melted cleanly. Therefore, it is a stable and stable food material that has excellent storage and usability.

It is very difficult to find such salt-like properties in the foods we eat.

Salt is based on this stability and convenience, and when it is combined with other ingredients, the product is also stable. In many cases, it is easy to ionize and easily dissolve in water.

That is to say, the salt is the same as melting in water.

Therefore, by using these properties, we can combine with the necessary elements to improve the stability of the combined elements and make it easy to ionize to obtain the desired result.

The production of salt that is useful and can satisfy consumer needs should be based on the characteristics of these salts and seawater and their understanding of the chemical industry.

Salt production is very simple to think easily. If the seawater is placed on a plate and left in the sun, it can be made in less than a day.

It is also difficult for people who have made salt for decades to think that it is difficult to make salt if the weather is impaired or the wind blows differently. It is also the salt industry that when it stops operating at a plant costing hundreds of millions of won, it will not be able to work any longer due to scaling and rusting. It is also the salt that the state has maintained for a long time by maintaining the repurchase system. It is salt that can not live if we do not eat for a day, and salt to move our body. The first thing to do when you go to a hospital is a ringer made of salt.

So, there have been many attempts to make good salt, but there has been no progress, and it is the salt production method that sticks to the old way which is not different from the past eventually.

What we are trying to implement in this invention is to break salt water that can break this old frame and return the option to consumers, and to make salt suitable for use. It is not a salt to be put in every food in a thousand times, but it is trying to make a salt that can be distinguished for each use and can be surely differentiated in its ingredient.

This requires efficient extraction techniques for minerals. In the present invention, minerals contained in seawater are separated into a specific component-strengthened form by making use of the characteristic that the crystallization varies depending on the degree of concentration, thereby producing a salt that consumers can choose according to the needs of consumers.

The present invention minimizes the problems of the above-mentioned conventional salt production methods and prepared salt, and realizes a salt having a specific mineral strengthened in an economical and convenient way during the production process of the salt, And to provide a simple and efficient separation and preparation method of minerals that can be used.

In addition, it is intended to be used in food, skin care, beverage industry, etc., by using minerals which are separated from minerals and fortified with salt.

(B) a first concentrating step of concentrating the seawater pretreated in step (a) to obtain a first concentrated water; and (c) A second concentration step of separating the first concentrated sea water into calcium salt and a second concentrated water using a hot air spray concentrated drying method; (d) drying the calcium salt separated in step (c) to obtain calcium crystals; (e) a third concentration step of separating the second concentrated water separated in step (c) into a sodium salt and a third concentrated water by a hot air spray concentrated drying method; (f) a step of separating the sodium salt separated in step (e) (G) Step of obtaining sodium salt: (g) Quaternary concentration step of obtaining magnesium salt and potassium salt by using hot air spray concentrated dry method in the third concentrated water separated in step (e): (h) Step Sodium salt, magnesium salt and potassium salt from seawater containing magnesium and potassium salts to obtain a magnesium salt and a potassium salt.

According to the present invention, it is possible to produce calcium salt, sodium salt, magnesium salt and potassium salt separately from seawater, and it is also possible to produce salt containing all of these components. By the principle that the minerals dissolved in the seawater crystallize at different points of time as the seawater is concentrated, the individual minerals are selectively separated and extracted and commercialized. When products are manufactured by applying these technologies, it is possible to selectively manufacture and supply products such as calcium salt, sodium salt, magnesium salt, potassium salt and salt containing both of these minerals in the hygienic manufacturing process And it is possible to use these products for food production, beverage industry and beauty industry.

Applying these technologies, it is now possible to bring about a revolutionary transition of the salt industry, which is the production of salt containing minerals selectively, unlike sodium-based salts. It is also possible to make a complete differentiation in claiming that there are many minerals by introducing calcium, magnesium and potassium which are gradually contained in the process of producing the salt.

In the future, it is also possible to produce a variety of products, such as kimchi containing calcium, bath salts containing magnesium, and massage salts containing potassium, which are clearly proven in the future.

Representative FIG. 1 shows the entire process.
1 shows an air purification apparatus. It is a device that purifies the air through a fine mesh and sends it to a hot air blower after passing through a space where fine dust can fall down.
2 shows a seawater pretreatment apparatus. MF filter to make seawater clean water.
Figure 3 shows a concentrator through the Ro facility. Separate with fresh water and primary concentrated water through concentrator.
Figure 4 shows various regulating devices. A temperature control device for hot air, a device for controlling the air flow rate, and a flow rate control device. Control the amount of moisture removed from seawater by regulating the hot wind and the amount of water entering the concentrating and separating unit.
5 shows a spray device. Split the seawater into fine mist and spray it.
Figure 6 shows an apparatus for separating various mineral salts from seawater through a concentrated drying and separating apparatus. It is a device that produces necessary mineral salts by removing the necessary amount of water from seawater through controlled hot air and concentrated seawater. It is possible to produce calcium salts at low concentrations, sodium salts at intermediate concentrations, and magnesium salts at high concentrations.
Figure 7 shows a cyclone. A device that keeps the seawater and minerals separated through the air outlet from the concentrating and separating device.

The overall manufacturing process of the present invention will be described as follows.

1 shows a method of producing products such as a calcium salt, a magnesium salt, a potassium salt and a sodium salt by separating and extracting a calcium salt, a magnesium salt, a potassium salt and a sodium salt from seawater and using these components to meet consumer needs; This is the entire process diagram for the product. Hereinafter, the present invention will be described in more detail.

A method of producing products such as calcium salt, magnesium salt, potassium salt and sodium salt suitable for the needs of consumers by separating and extracting calcium salt, magnesium salt, potassium salt and sodium salt from seawater

 (a) Pre-treatment step of filtering seawater: (b) Concentrating the pretreated seawater in step (a) through an RO facility to separate and extract the first concentrated water and fresh water: (c) Separating the concentrated seawater into a calcium salt and a second concentrated water using a hot air spray concentrated drying method; (d) drying the calcium salt separated in step (c) to obtain calcium crystals; (e) separating the second concentrated water separated in step (c) into a sodium salt and a third concentrated water by a hot air spray concentrated drying method; and (f) drying the sodium salt separated in step (e) (G) obtaining a magnesium salt and a potassium salt using the hot air spray concentrated drying method in the third concentrated water separated in the step (e): (h) obtaining the magnesium salt and potassium salt obtained in step (g) And treating the salt to obtain a magnesium salt and a potassium salt.

One embodiment of the present invention provides a method of separating each of minerals such as calcium, sodium, magnesium and potassium contained in seawater at a high purity without impairing the damage or efficiency of the salt production facility by a simple manufacturing process and an economical method And how to do it.

The present invention provides an apparatus for enabling this. 1. An air purifier for purifying input air,

2. Pretreatment device that treats seawater with clean water through MF filter, 3. Enrichment device that separates seawater into fresh water and primary concentrated water through RO facility, etc. 4. Manufacture hot air and adjust hot air temperature 5. Air volume control device for controlling the amount of air to be introduced, 6. Volume control device for controlling the amount of seawater to be supplied to the concentrating device for removing water using hot wind, 7. Device for spraying seawater into fine mist 8. A device for separating various mineral salts such as calcium, sodium, magnesium and potassium that are crystallized differently depending on the concentration of seawater in the seawater through the removal of water from the seawater. 9. In the separating device, Thereby providing a cyclone device for catching outgoing light.

If necessary, the related devices can be used repeatedly or independently. For example, calcium salt can be produced in the second concentration process, sodium salt in the third, magnesium salt and potassium salt in the fourth, but since there is a necessity to make sodium salt containing calcium, If you need to make salt with all the minerals, you can omit the separation step and adjust the hot wind and the amount of the feed. You can also make salt products.

Hereinafter, the present invention will be described in detail with reference to Examples. However, the following examples are illustrative of the present invention, and the contents of the present invention are not limited to the following examples

Example 1: Pretreatment of seawater and primary seawater concentration

Seawater contains various substances. There are some things that are visible to the naked eye and others that are not visible. In the case of sun saliva, it is simple to set up a sedimentation basin to clean up foreign matter such as dust, but it is almost impossible to remove all kinds of impurities contained in seawater. Therefore, a filtration process using a fine ultrafine filter such as a microfilter or an ultrafilter is required. This work is also needed to create clean sea water itself, but it is also necessary for the purification of seawater into subsequent RO (reverse osmosis) equipment. It is composed of precise membranes, and seawater containing foreign matter can block the membrane and cause biofouling if it is injected. Therefore, pre-treatment of seawater through a precision filter is indispensable.

The related facilities can be installed and operated as shown in Figs.

The seawater that has undergone the pretreatment process is put into the RO (reverse osmosis membrane) facility and separated into fresh water and primary concentrated water. The RO membranes are membranes and associated devices that are designed to reverse osmotic pressure and to allow osmotic pressure to be exerted on one side and the fresh water to escape to the other side.

Through this RO device, fresh water is obtained, from which enriched concentrated water and seawater salts are removed. The concentration of concentrated water and fresh water varies depending on the pressure applied and the manufacturer of the membrane, but in the case of concentrated water, the salt concentration of 3.4% of seawater is increased to 5.5% ~ 7% A reasonable level of freshwater will be created.

The fresh water thus produced is used for drinking water and related water, and the concentrated water is used for the next step to be used for mineral extraction and salt production.

Example 2: Control of seawater and hot air introduced into the process

Concentrated sea water is added to the salt production process and used for mineral extraction extraction and salt production. It is very important to control the amount of hot air and seawater input to produce the desired salt. The amount and temperature of hot wind is the energy used for the evaporation of seawater, and the amount of seawater input is related to the amount of salt produced and correlated with the amount of energy input. If the amount and temperature of hot air are kept constant, the concentration of seawater is determined by controlling the amount of seawater input, and if the amount of seawater is constant, the degree of enrichment of seawater is determined by controlling the amount of input energy.

Energy is required for seawater to evaporate and separate into water and residues.

Water boils at 100 ° C, and when it is heated at 100 ° C, 539cal of heat is added per 1g, it evaporates. However, water evaporates at room temperature.

Liquid water does not have as much kinetic energy as water vapor, but constantly undergoes intermolecular movement within the water. At this time, as the intermolecular kinetic energy becomes active, the intermolecular connection energy becomes weak and evaporation occurs. Because of this principle, if the laundry is hanged, the water will evaporate and dry even if the laundry does not reach 100 ℃.

As a method of rapidly evaporating water at room temperature, it is possible to evaporate a large amount of water at a high rate even at room temperature by lowering the pressure, widening the surface area of evaporation, or imparting kinetic energy or activation energy to water.

The present invention utilizes this principle to enhance the efficiency of seawater by dividing seawater into fine mist-like water droplets. The seawater is split into fog levels through the device shown in FIG. 5 to maximize the surface area, thereby promoting the evaporation of seawater with less energy. Applying this principle and conducting the concentration process, it becomes possible to reduce the amount of energy to be supplied as compared with the method of evaporating seawater by using the pyrolytic pot.

The method of making salt, whether it is salt or salt, has a lot of energy consumption due to the limited surface area of evaporation. It is possible to solve these problems.

That is, even if the temperature of the hot air to be introduced is controlled to 100 캜 or less, minerals can be separated and salt can be produced.

Experimental results show that it is possible to produce related products by blowing hot air at about 50 ℃. Although there is a problem of production per unit time, it is possible to produce the product even under various temperature conditions, and it becomes possible to solve various problems caused by the increase in temperature. It is possible to remarkably control various problems such as a problem of safety accident coming from a high temperature, a problem of degeneration of a product, a problem of expansion and contraction of a facility, and a problem of scale generation.

In order to operate such facilities, it is absolutely necessary to control the input energy (amount of hot wind and temperature) and the condition (temperature and amount) of the seawater to be inputted. The related apparatus is shown in Fig.

Example 3: Concentration device for separating mineral salts

A seawater concentrating and drying apparatus for separating mineral salts consists of a concentrating room (space) and a seawater spraying device. Seawater spraying devices can have a variety of ways as shown in the table.

Seawater spraying device division Rotating disk Pressure nozzle 2 fluid nozzle 1) Throughput range 1 to several thousand Kg / h 50 ~ Thousand Kg / h 1 to several thousand Kg / h
(Relatively small capacity) 2) Viscosity change Corresponds to change of rotation number Difficulty in handling Response by changing air pressure 3) Viscosity range 1 to tens of thousands cp 1 ~ thousands cp 1 ~ thousands cp 4) Pressure Low pressure ~ 3Kg / ㎠ High pressure 10 ~ 100Kg / ㎠ Low pressure ~ 3Kg / ㎠ 5) High pressure pump Unnecessary need Unnecessary 6) Recommended average particle size 10 to 130 탆 70 to 250 탆 20 to 100 탆 7) Particle size distribution Narrow middle wide 8) Contact with hot air Cocurrent Cocurrent, Countercurrent, Mixed Cocurrent 9) Space size versus small small 10) Space height small versus medium 11 Other Disc diameter: 5 to 50 cm
Rotation speed: 400 ~ 20,000 rpm Orifice diameter: 0.5 to 8 mm
Spraying pressure: 20 to 300 kg / cm 2

As a result of the related experiment, it was judged to be a useful method for separating and extracting minerals using seawater.

The rotary disk method proved to be suitable for large capacity and high efficiency. Of course, other ways have also proved feasible.

 The composition of the concentrated drying chamber, which is an enriched space, is constituted by a rectangular hexahedron having six closed clogs.

As shown in Fig. 6, is composed of a long hexagonal barrel. It is composed of the part where the hot air and the sea water come out, the front where the rotating disk where they meet, the long space blocked everywhere, and the outlet where the cyclone device which catches the discharged water vapor and residual mineral ingredient is attached.

Inside the space are attached devices that can collect the production minerals and concentrated seawater.

The collected minerals are separated and extracted, and the concentrated seawater is stored in a separate storage device and then put into the next process. Conventional product drying rooms using hot air have been mainly used for drying specific components at a time. This is because it is difficult to separate certain components in the contents and the need for separation is also small.

The present invention utilizes the characteristic that the time determined according to the degree of enrichment of minerals contained in seawater is different, so that various minerals contained in seawater can be easily separated and salt production can be facilitated.

Patent No. 10-0885175, which is a patent owned by the Company, has a problem of difficulty in scale operation and difficulty in operating the equipment while extracting and extracting minerals, and it is difficult to produce small capacity.

The present invention is a new invention to solve such a problem.

Example 4 Calcium Salt Preparation Step

Calcium salts have the property of crystallizing at low concentrations, as can be seen in Table 4 presented above.

These characteristics have been determined early in the existing salt production facilities and attached to the equipment to create various troubles in the equipment, causing the cause of the machine failure and deteriorating the energy efficiency. Therefore, it was a key area of development of salt production technology to remove it or not stick to it.

In order to prevent calcium from adhering to the surface, a method of crystallizing the calcium component by submerging a multi-stage torsion beam before sun-salt has been adopted.

In the case of purified salt, it is necessary to remove the divalent ions by using a membrane which makes the permeation of monovalent ions easier and the passage of calcium ions which are bivalent ions, 16 ~ 20%) and added to the evaporation process to suppress the scale generation by calcium.

In the process of manufacturing salt using a vacuum multi-stage evaporator, the boiling point has been minimized to minimize the adhesion of calcium particles to the area where heat is brought into contact. In addition, efforts to reduce the adhesion of calcium by maximizing the flow rate in the equipment .

Despite all of these efforts, it is impossible to prevent the adhesion of all calcium particles, so that facility troubles continue to occur, and the role of the culprit is deteriorating the efficiency of the salt production facility.

The present invention makes it possible to produce calcium, a useful mineral, in an edible and fine particle state while solving these problems.

When the seawater is blown into a large space with fine mist and blowing hot air here, the sea water is blown through the wide space, and hot air and contact evaporation are made. As the water is removed to some extent and the concentration progresses, the calcium component in the seawater crystallizes and falls to the bottom, and the remaining seawater also falls to the bottom. The evaporated water is discharged through the outlet on the opposite side. After the separated calcium crystals and the remaining seawater are collected, the crystals are separated and dried, so that the calcium product can be obtained. The drying process of calcium may be followed by a general drying process, and once the calcium crystals having a certain amount of seawater are sprayed into the space once again and the process of blowing hot air is repeated, sufficient drying is performed and commercialization becomes possible.

The amount of hot air and the amount of seawater that enables this process should be less than 25% (the specific gravity is 1.1864 or less) of the seawater falling into the space. If this condition is exceeded, salt crystals are formed as shown in Table 4, and salt or sodium content is increased. Therefore, care must be taken.

If calcium is extracted as in the present invention, facility trouble due to the attachment of calcium does not occur. That is, the adhesion of calcium is well formed in the region where heat is generated and adheres to the inside of the pipe-like portion to cause a problem, since the manufacturing process of the present invention does not have such a portion at all. There is a case where a part is blown and attached to a wall surface, and the amount thereof is small and there is no relation with the efficiency of the equipment even if it is attached.

Therefore, when calcium is separated and extracted according to the present invention, it is possible to stably extract a product having a high purity without troubles in equipment

Example 5: Preparation of sodium salt

The preparation of the sodium salt, i.e., the sodium chloride salt, is accomplished by varying the concentration only in the above example. In other words, it is necessary to blow seawater having a concentration of 20 ~ 25% into fine particles in a space and blow it with a certain temperature and positive hot wind. Then, when salt and seawater that have fallen to the bottom are collected and salt and seawater are separated, sodium salt, that is, sodium chloride center salt, can be obtained. Of course, in this case, it is not necessary to adjust the amount of hot air and seawater so that the evaporation of water is 100%. In order to evaporate 100%, a large amount of energy is also required. However, since the magnesium potassium is crystallized and contained in the salt, the taste of the salt becomes a bitter taste. Therefore, the amount of hot wind and the amount of seawater should be applied to the level below 1.2512 to prevent 100% evaporation. The sodium chloride thus separated and extracted is dried and converted into a salt product. The drying process proceeds to a process similar to the previous calcium drying process.

Example 6 Preparation of Potassium Salt of Magnesium Salt

The production of magnesium and potassium salts consists of a relatively small amount of seawater input. At this stage, the amount of seawater input is reduced to one-tenth of the initial input. Moisture is almost evaporated because the calcium and the salt in large amounts have already been crystallized and removed. Therefore, it is effective to carry out this process by repeating the calcium extraction process and the sodium extraction process several times and then using concentrated sea water.

These components, which are collectively referred to as wastewater, are very difficult to dry because of their special properties. It is very difficult to press, stick to, and extract into particles. If it is dried by a method of spraying hot air while blowing it in the air, it is possible to extract in a small particle state, and it is also possible to prevent pressing. When it is necessary to separate the magnesium salt and calcium salt from each other, it is convenient to separate the magnesium salt and calcium salt separately from the concentrated liquid state after the third step (separated by the difference in temperature and specific gravity), and then put them into the fourth step to commercialize them.

Example 7: Preparation of salts containing calcium, sodium and magnesium potassium in an integrated manner

It is also possible to produce whole salt without separating calcium, sodium, magnesium and potassium from seawater respectively. This can be done at any time by adjusting the amount of sea water, amount of hot wind and temperature. In this case, a salt containing a large amount of minerals other than sodium can be obtained, but there is a problem that a taste is consumed due to a large amount of magnesium. A large amount of calcium may reduce the bitterness to some extent, but it may disfavor a sensitive person. To solve this problem, it is possible to purify the bitter taste to some extent by heat treatment (magnesium chloride is converted into magnesium oxide - baked salt).

Of course, when a small amount is used, there is no big problem in taste.

The salt content of minerals in the case of salt production is as follows.

Mineral content in product division salt magnesium calcium potassium Amount of minerals contained in the salt prepared in Example 7/100 g 29.1 g 3160 mg 900 mg 960 mg Mineral amount of normal deep beard 41.4 g 730 mg 240 mg 360 mg Mineral content 37.5g 250 mg 140 mg 170 mg

1. Air purifier that purifies the incoming air
2. Pretreatment system that treats seawater with clean water through MF filter
3. Enrichment device separating seawater into fresh water and primary concentrated water through RO facility
4. A hot air blower for producing hot air and controlling the temperature of hot air
5. Air volume control device to adjust air volume
6. a water quantity control device for controlling the amount of seawater supplied to the concentrating device for removing hot water using the hot wind, 7. a device for spraying seawater into a fine mist state
8. A device for separating various mineral salts such as calcium, sodium, magnesium, potassium, etc. that are crystallized differently depending on the concentration of seawater in seawater through removal of water from seawater
9. A cyclone device that seals seawater and minerals from the separation device through the air outlet.

Claims (5)

Separation of seawater minerals in seawater by stepwise and selectively separating calcium, sodium, magnesium, and potassium in seawater according to the difference in concentration of seawater by evaporating the water in seawater by blowing seawater by blowing seawater into fine mist. As a result,
A first separation and extraction step of passing the seawater through a reverse osmosis membrane and separating only concentrated water to produce a first concentrated water;
A second separation and extraction step of concentrating the primary concentrated water to a specific gravity of 1.1864 or less and then subjecting the calcium salt to hot air drying;
A third separation and extraction step of concentrating the primary concentrated water to a specific gravity of 1.12512 or less and then subjecting it to hot air drying to separate the sodium salt; And
A fourth separation and extraction step of concentrating the primary concentrated water to a specific gravity of 1.12924 or less and then subjecting it to hot air drying to separate the magnesium salt and the potassium salt;
Lt; / RTI &gt;
The hot air drying is carried out in a rotary disk type seawater spray apparatus having a disk diameter of 5 to 50 cm and a rotation number of 400 to 20,000 rpm by controlling the grain size of the concentrated water in each step to 10 to 130 탆, And blowing hot air while spraying the water,
The second separation and extraction step of separating the calcium salt is performed by adjusting the concentration of the primary concentrated water to be 25% or less,
Wherein the third separation and extraction step of separating the sodium salt is performed by adjusting the concentration of the primary concentrated water to be between 20 and 25%.
delete The method according to claim 1,
The hot air is hot air generated by air made of clean air through a space where fine dust or the like is filtered and filtered at multiple stages,
Wherein the seawater is a mineral seawater extracted from seawater filtered through a microfilter and an ultrafilter.
delete The method according to claim 1,
Wherein the separation and extraction of each step is performed by re-introducing the concentrated water into one identical apparatus.

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