KR20210047106A - The the Method of Enriched Mineral Manufacture and Blending using the Deep Sea Water - Google Patents

Abstract

The present invention relates to a method for producing a mineral concentrate using deep sea water. The present invention reduces operating costs. The present invention comprises the steps of: obtaining first concentrated water and first treated water; obtaining a first concentrate; obtaining a calcium salt concentrate; obtaining a primary sedimentation separation upper liquid and a primary sedimentation separation lower liquid; obtaining a secondary sedimentation separation upper liquid and a secondary sedimentation separation lower liquid; obtaining a primary magma; obtaining a first mother liquid; obtaining a secondary magma and a secondary mother liquid; obtaining secondary treated water; and obtaining mineral water.

Description

The Method of Enriched Mineral Manufacture and Blending using the Deep Sea Water}

The present invention relates to a method for preparing a mineral concentrate using deep ocean water, and more particularly, to a method for preparing mineral water from deep ocean water using a reverse osmosis membrane (RO membrane) and an evaporative concentration system. It's about the method.

Deep ocean water is seawater that exists in a depth of 200m or more where sunlight does not reach, is far from the coast, and does not mix with the atmosphere or surface water due to the difference in water temperature and density from the surface water, so pathogens, organic compounds such as fertilizers or pesticides It is known as a marine water resource that maintains clean characteristics for a long time because the inflow of chemical pollutants such as etc. is structurally blocked.

Deep ocean water contains a large amount of various minerals such as magnesium (Mg), calcium (Ca), potassium (K), sodium (Na), zinc (Zn), selenium (Se), and manganese (Mn). It is known as a raw material report of (寶庫), and minerals contained in deep ocean water can be a very useful source of minerals for modern people, but deep ocean water contains a significant amount of salt (NaCl). Research on various methods for desalination and utilization are actively being conducted.

Conventionally, as a method for desalination of deep sea water, the seawater is heated and guided into a decompression chamber, and after it is evaporated, the vacuum evaporation method in which fresh water is obtained by condensing the generated steam, and salt contained in the deep sea water using a nano-sized filtration membrane. Alternatively, a filtration method in which fresh water is obtained by removing small molecule compounds with a molecular weight of 1 kD or less, a reverse osmosis method in which fresh water is obtained by removing harmful substances such as chlorine ions contained in deep ocean water with a reverse osmosis membrane that passes water but does not pass ions, or, The technical content of a method of performing the above-described methods in multiple steps has been disclosed.

1. Korean Patent Application Publication No. 10-2017-0119118 2. Korean Registered Patent Publication No. 10-1227067

In the present invention, the conventional electrodialysis device is not used, and the reverse osmosis membrane and the evaporation and concentration system are applied to reduce the energy cost by not using high-pressure power, thereby reducing operating costs and providing a high mineral concentrate. The problem is to provide a method for producing a mineral concentrate using deep ocean water that can adjust the mineral composition ratio of water to the raw water composition ratio.

In the method for producing a mineral concentrate using deep ocean water of the present invention, which solved the above problems, the deep ocean water is taken and stored in a raw water tank, and the deep ocean water of the raw water tank is passed through a precision filtration membrane (MF membrane), and then the first station Passing through an osmotic membrane to obtain first concentrated water and first treated water having a salinity of 8 to 9%;

Adding the first concentrated water to a triple-effect concentrator to evaporate and concentrate to obtain a first concentrated solution;

Adding the first concentrate to a first batch concentrator and concentrating at a temperature of 97 to 99° C. for 8 to 9 hours to obtain a calcium salt concentrate in which _{a calcium salt (CaSO 4) crystal is formed;}

Sedimentation of the calcium salt concentrate for 2 to 3 hours in a settling tank to precipitate calcium salt crystals, and obtaining a first sedimentation separation supernatant and a first sedimentation separation lower layer;

Adding the first sedimentation separation lower layer to a sedimentation tank and sedimentation for 2 to 3 hours to obtain a second sedimentation separation supernatant and a secondary sedimentation separation sublayer;

Transferring the first sedimentation supernatant and the second sedimentation separation supernatant to a second batch concentrator and concentrating at 74 to 78° C. for 4 to 5 hours to obtain a first magma;

Obtaining a first mother liquor by rotating the first magma in a centrifuge at high speed and centrifuging for 20 to 25 minutes;

The first mother liquor was put in a third batch concentrator and concentrated at a temperature of 45 to 55°C for 2 to 3 hours to obtain a second magma, and the second magma was rotated at high speed in a centrifuge for 20 to Centrifuging for 25 minutes to obtain a second mother liquor;

Passing the first treated water obtained by passing through the first reverse osmosis membrane through the second reverse osmosis membrane to obtain secondary treated water;

And mixing the second mother liquor and the second treated water at a predetermined ratio in a mineral conditioning tank to obtain a mineral concentrate having an adjusted mineral content.

here,

The step of obtaining the first concentrated liquid comprises the steps of first circulating concentration of the first concentrated water in a first chamber at a temperature of 97 to 99°C for 8 to 9 hours; And

Transferring the circulating concentrate having completed the first circulating concentration to a second chamber and performing secondary circulating concentration for 4 to 5 hours under a temperature condition of 74 to 78°C; And

The circulating concentrate having the secondary circulating concentration completed is transferred to a third chamber and obtained through a concentration process comprising the step of performing a third circulating concentration for 2 to 3 hours at a temperature of 45 to 55°C.

Here, the supply pressure passing through the first reverse osmosis membrane is characterized in that 85 kg/cm 2.

Here, the pressure passed through the second reverse osmosis membrane is characterized in that 20 kg/cm 2.

Here, the first and second reverse osmosis membranes are characterized by using one having a driving force of 30 to 90 atm of the positive pressure difference.

Here, the secondary mother liquor and the secondary treated water added to the mineral adjustment tank are mixed in a weight ratio of 2:1 to 3:1.

Here, the mineral water mixed and completed in the mineral adjustment tank is characterized in that Mg:Ca:K is contained in a concentration of 3:1:1.

The mineral concentrate manufacturing method according to the present invention does not use the conventional electrodialysis device used to produce deep sea water, so that the energy used to process the deep sea water is less, so the production energy cost is reduced, and the high voltage power There is an advantage of reducing operating costs by using waste heat recovery instead of using.

In addition, the method for producing mineral water according to the present invention has the advantage of obtaining a high mineral concentrate by concentrating deep ocean water, and using the high mineral concentrate to appropriately adjust the composition ratio of minerals contained in the mineral water to produce it.

1 to 3 are block diagrams showing an example of processing a mineral concentrate using deep ocean water for explaining the present invention.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

1 to 3 are block diagrams showing an example of processing and manufacturing a mineral concentrate using deep ocean water for explaining the present invention.

When describing the present invention with reference to this,

It is an object of the present invention to provide a method for preparing a mineral concentrate using deep ocean water that produces a mineral concentrate from deep ocean water using a reverse osmosis membrane (RO membrane) and an evaporative concentration system without using an electrodialysis device. ,

In the method for producing a mineral concentrate using deep ocean water of the present invention that achieves the above object, the deep ocean water is taken and stored in a raw water tank, and the deep ocean water from the raw water tank is passed through a precision filtration membrane (MF membrane), and then the first station Passing through an osmotic membrane to obtain a first concentrated water and a first treated water having a salinity of 8 to 9%; and

Adding the first concentrated water to a triple-effect concentrator to evaporate and concentrate to obtain a first concentrated solution; and

Adding the first concentrate to a first batch concentrator and concentrating at a temperature of 97 to 99° C. for 8 to 9 hours to obtain a calcium salt concentrate in which _{calcium salt (CaSO 4) crystals are formed; And}

Precipitating the calcium salt crystals by sedimenting the calcium salt concentrate in a settling tank for 2 to 3 hours, and obtaining by separating the first sedimentation separation supernatant and the first sedimentation separation lower layer; and

Injecting the first sedimentation separation lower layer into a sedimentation tank and sedimentation for 4 to 5 hours to obtain a secondary sedimentation separation supernatant and a second sedimentation separation sublayer solution; and

Transferring the first sedimentation supernatant and the second sedimentation separation supernatant to a second batch concentrator and concentrating at 74 to 78° C. for 4 to 5 hours to obtain a first magma; And

Putting the primary magma into a centrifuge and centrifuging at high speed for 20 to 25 minutes to obtain a primary mother liquor; And

The first mother liquor was put in a third batch concentrator and concentrated at a temperature of 45 to 55°C for 2 to 3 hours to obtain a second magma, and the second magma was rotated at high speed in a centrifuge for 20 to Centrifuging for 25 minutes to obtain a second mother liquor; and

Passing the first treated water obtained by passing through the first reverse osmosis membrane through the second reverse osmosis membrane to obtain secondary treated water; and

The technical feature is that the secondary mother liquor and the secondary treated water are added to a mineral conditioning tank at a predetermined ratio and mixed to obtain a mineral concentrate having an adjusted mineral content.

At this time, preferably, the step of obtaining the first concentrated liquid comprises the steps of first circulating concentration of the first concentrated water in a first chamber for 8 to 9 hours under a temperature condition of 97 to 99°C; And

Transferring the circulating concentrate having completed the first circulating concentration to a second chamber and performing secondary circulating concentration for 4 to 5 hours under a temperature condition of 74 to 78°C; And

The circulating concentrate having the second circulating concentration completed is transferred to a third chamber and is obtained through a concentration process comprising the step of performing the third circulating concentration for 2 to 3 hours at a temperature of 45 to 55°C.

According to the present invention, preferably, the supply pressure for passing the deep ocean water passed through the precision filtration membrane (MF membrane) through the first reverse osmosis membrane is preferably 55 to 60 kg/cm 2, more preferably 60 to 70 kg It is good to be /cm2, and most preferably, it is passed by maintaining the supply pressure of 65kg/cm2.

According to the present invention, the supply pressure for passing the first treated water obtained by passing through the first reverse osmosis membrane through the second reverse osmosis membrane is preferably 75 to 85 kg/cm 2, more preferably 80 kg/cm 2 It is to input by maintaining the supply pressure of.

According to the present invention, the first and second reverse osmosis membranes used are generally those having a driving force of a positive pressure difference of 20 to 100 atm, and preferably having a driving force of a positive pressure difference of 30 to 90 atm of the first and second reverse osmosis membranes. Good to use. The reason is that the condition of the reverse osmosis membrane is determined according to the difference in positive pressure, and the components of the permeate and concentrated water are determined.

According to the present invention, preferably, the secondary mother liquor and the secondary treated water added to the mineral conditioning tank are mixed in a weight ratio of 2:1 to 3:1. If it is out of the threshold of the mixing ratio, there is a disadvantage that it is difficult to expect a desirable mineral content ratio. That is, according to the present invention, the mineral concentrate mixed in the mineral adjustment tank and completed has a technical characteristic that Mg:Ca:K is contained in a concentration of 3:1:1, and the secondary mother liquor and 2 This is because, if the ratio of the mixing ratio for mixing the tea treated water is out of the threshold, it may lead to a result of not satisfying the ratio of the three mineral content concentrations.

Claims (7)

The deep ocean water is collected and stored in a raw water tank, and the deep ocean water of the raw water tank is passed through a precision filtration membrane (MF membrane), and then passed through a first reverse osmosis membrane to provide primary concentrated water with a salinity of 8 to 9%. Obtaining treated water;
Adding the first concentrated water to a triple-effect concentrator to evaporate and concentrate to obtain a first concentrated solution;
Adding the first concentrate to a first batch concentrator and concentrating at a temperature of 97 to 99° C. for 8 to 9 hours to obtain a calcium salt concentrate in which _{a calcium salt (CaSO 4) crystal is formed;}
Sedimenting the calcium salt concentrate for 2 to 3 hours in a sedimentation tank to precipitate calcium salt crystals, and obtaining a first sedimentation separation supernatant and a first sedimentation separation lower layer solution;
Adding the first sedimentation and sedimentation lower layer liquid to a sedimentation tank and sedimenting for 4 to 5 hours to obtain a secondary sedimentation separation supernatant and a second sedimentation separation lower layer;
Transferring the first sedimentation supernatant and the second sedimentation separation supernatant to a second batch concentrator and concentrating at 74 to 78° C. for 4 to 5 hours to obtain a first magma;
Placing the primary magma into a centrifuge and centrifuging at high speed for 20 to 25 minutes to obtain a primary mother liquor;
The first mother liquor was put in a third batch concentrator and concentrated at a temperature of 45 to 55°C for 2 to 3 hours to obtain a second magma, and the second magma was rotated at high speed in a centrifuge for 20 to Centrifuging for 25 minutes to obtain a second mother liquor;
Passing the first treated water obtained by passing through the first reverse osmosis membrane through the second reverse osmosis membrane to obtain secondary treated water;
And mixing the secondary mother liquor and the secondary treated water at a predetermined ratio in a mineral conditioning tank to obtain mineral water having an adjusted mineral content.
The method of claim 1,
The step of obtaining the first concentrated liquid comprises the steps of first circulating concentration of the first concentrated water in a first chamber at a temperature of 97 to 99°C for 8 to 9 hours; And
Transferring the circulating concentrate having completed the first circulating concentration to a second chamber and performing secondary circulating concentration for 4 to 5 hours under a temperature condition of 74 to 78°C; And
The circulating concentrated solution having the secondary circulating concentration completed is transferred to a third chamber and obtained through a concentration process comprising the step of performing a third circulating concentration for 2 to 3 hours at a temperature of 45 to 55°C. Method for preparing a mineral concentrate.
The method of claim 1,
A method for producing a mineral concentrate using deep ocean water, characterized in that the supply pressure passing through the first reverse osmosis membrane is 65 kg/cm 2.
The method of claim 1,
A method for producing a mineral concentrate using deep ocean water, characterized in that the pressure passing through the second reverse osmosis membrane is 85 kg/cm 2.
The method of claim 1,
A method for producing a mineral concentrate using deep ocean water, characterized in that using one having a driving force of 70 to 80 atm of the positive pressure difference between the first and second reverse osmosis membranes.
The method of claim 1,
A method for producing a mineral concentrate using deep ocean water, characterized in that the secondary mother liquor and the secondary treated water introduced into the mineral conditioning tank are mixed in a weight ratio of 2:1 to 3:1.
The method of claim 1,
A method for producing a mineral concentrate using deep ocean water, characterized in that the mineral concentrate mixed and completed in the mineral adjustment tank contains Mg:Ca:K in a concentration of 3:1:1.

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