JP2981077B2 - Mineral recovery method and mineral recovery device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for recovering a specific mineral component from a solution containing various minerals,
Particularly, the present invention relates to a mineral recovery method and a mineral recovery apparatus suitable for recovering NaCl from urine wastewater.

[0002]

BACKGROUND OF THE INVENTION Minerals, which are inorganic nutrients, are involved in the most basic processes of life. Mineral is N
There are main elements of a, K, Mg, Ca, P, S, and Cl, and other trace elements such as Cu and Zn, which are mainly taken into the human body in a form contained in foods and pharmaceuticals.

For example, among them, Na and Cl are contained in a large amount in food salt as NaCl, and many methods for producing this salt have been devised as so-called salt production techniques. One example is a method for producing salt from seawater. In seawater, minerals Na, K,
Mg, Ca, Cl, etc. are contained as components, of which Na and Cl are the most numerous, and seawater contains about 3.4% in the form of NaCl. The method of salt production from seawater uses this N
For the purpose of recovering aCl with as high a purity as possible, it is mainly performed by a salt field method (evaporation concentration method), an electrodialysis method, or the like.

The Shioda method is an ancient method, in which sand is laid on a clay ground or a vinyl sheet inclined toward the south, and seawater is gradually flown to concentrate NaCl to about 8%. Then, it is allowed to fall from the top of a branch made of tree branches and concentrated to about 16%, and usually boiled in a multi-effect can to produce salt containing high-purity NaCl.

Recently, a method of concentrating seawater by an electrodialysis method using an ion exchange membrane has been widely used. In the electrodialysis method, seawater is poured into a chamber in which several hundred cation exchange membranes and anion exchange membranes are alternately arranged, and current is passed from both ends of the chamber. At this time, NaCl is 12
１８18%, while the NaCl in the dilution chamber is discharged at about 2%. This concentrated salt water is further boiled by a steam pressurization method or a multiple effect method, and salt containing high-purity NaCl is collected.

[0006] In each of the above methods, Na
In the process of purifying Cl, K ^+, which is also a main element of minerals, is recovered in the form of KCl. A well-known example of a method for producing salt from seawater is, for example, Fuji Techno System p.554, "Recent Membrane Processing Technology and Its Application".

[0007]

By the way, for example, in a material recycling system in a closed environment system such as a toxic substance handling facility and outer space, it is necessary to purify wastewater and reuse it in some form. put it here,
Among various wastewaters such as sewage, shower water, plant cultivation liquid, etc., since urine contains the most salt, NaCl is converted from a mineral solution (hereinafter referred to as urine wastewater as appropriate) generated by wet oxidation of urine. It is considered to be recovered. However, when the known technique in the above salt production method is applied to the recovery of NaCl from urine wastewater, the following problems exist.

[0008] In the salt production method in the above-mentioned known technology, a method is employed in which seawater is directly concentrated and all mineral components such as NaCl are recovered without particular separation or removal of specific mineral components. This is because most of the mineral components in seawater are NaCl. FIG. 7 shows the components of seawater. In FIG. 7, it can be seen that seawater contains Na, K, Mg, Ca, P, S, and Cl, which are the main elements of minerals, and in particular, Na and Cl are contained in large amounts.

On the other hand, FIG. 8 shows components of urine drainage assumed in a closed environment recycling system. In FIG. 8, it can be seen that the urine drainage contains the main elements of minerals, like Na, K, Mg, Ca, P, S, and Cl, like seawater. Shows that the concentrations of Na and Cl to be recovered are small. That is, since urine wastewater contains various other mineral components in addition to NaCl to be recovered, it is necessary to recover NaCl after separating and removing these other mineral components. Is not applicable. An object of the present invention is to provide a mineral recovery method and a mineral recovery apparatus capable of recovering NaCl from urine wastewater.

[0010]

To achieve the above object, according to the solution to ## according to the present invention, the sodium ion even without low,
And potassium ions, from the mineral solution having a plurality of mineral components containing chlorine ions and the sodium ions and the potassium ions and the chloride ions are separated and recovered sodium chloride and the sodium ions and potassium ions and chloride ions In the mineral recovery method,
Electrodialysis using ion exchange membrane with monovalent selectivity
The sodium ion and the potassium ion
A mineral recovery method is provided, wherein the method separates the chlorine ions from the mineral solution .

[0011]

In order to achieve the above object, the present invention provides
According to at least sodium ion and potassium ion
And a plurality of mineral components including chlorine ions
The sodium ion and the potassium from the mineral solution
Ion and the chloride ion are separated and the sodium ion is separated.
Sodium chloride from on, potassium ion and chloride ion
A mineral recovery method for recovering sodium chloride by recovering sodium chloride from sodium ions, potassium ions, and chloride ions separated from the mineral solution by a concentrated crystallization method using a solubility difference between potassium chloride and sodium chloride. A method for recovering minerals is provided.

In order to achieve the above object, the present invention provides
According to at least sodium ion and potassium ion
And a plurality of mineral components including chlorine ions
The sodium ion and the potassium from the mineral solution
Ion and the chloride ion are separated and the sodium ion is separated.
Sodium chloride from on, potassium ion and chloride ion
A method for recovering sodium chloride, wherein sodium chloride is recovered from sodium ions, potassium ions, and chloride ions separated from the mineral solution by a chromatographic separation method using an ion separation column equipped with an ion adsorbent. And a method for recovering minerals.

In order to achieve the above object, the present invention provides
According to at least sodium ion and potassium ion
And a plurality of mineral components including chlorine ions
The sodium ion and the potassium from the mineral solution
Ion and the chloride ion are separated and the sodium ion is separated.
Sodium chloride from on, potassium ion and chloride ion
In the method of recovering minerals, the sodium ions, the potassium ions, and the chloride ions are separated from the mineral solution by electrodialysis using an ion exchange membrane having monovalent selectivity, and the sodium ions and potassium ions are separated. There is provided a mineral recovery method characterized by recovering sodium chloride from a mixed solution of ions and chloride ions by a concentrated crystallization method utilizing a difference in solubility between sodium chloride and potassium chloride.

Further, in order to achieve the above object, the present invention
According to at least sodium ion and potassium ion
And a plurality of mineral components including chlorine ions
The sodium ion and the potassium from the mineral solution
Ion and the chloride ion are separated and the sodium ion is separated.
Sodium chloride from on, potassium ion and chloride ion
In the method of recovering minerals, the sodium ions, the potassium ions, and the chloride ions are separated from the mineral solution by electrodialysis using an ion exchange membrane having monovalent selectivity, and sodium ions and potassium ions are separated. And a second concentrated solution containing chloride ions, and then contained in the first concentrated solution by a chromatographic separation method using an ion separation column equipped with an ion adsorbent. The sodium ion and the potassium ion are separated, and the sodium ion is mixed with the chloride ion contained in the second concentrated solution to recover sodium chloride. Provided.

In order to achieve the above object, the present invention provides
According to at least sodium ion and potassium ion
And a plurality of mineral components including chlorine ions
The sodium ion and the potassium from the mineral solution
Ion and the chloride ion are separated and the sodium ion is separated.
Sodium chloride from on, potassium ion and chloride ion
In the method for recovering minerals, the mineral solution is separated into a first solution and a second solution, and ions are separated from the first solution by a chromatographic separation method using an ion separation column provided with an adsorbent. After separating the sodium ions and the potassium ions and separating the chlorine ions from the second solution, the sodium ions separated from the first solution and the chloride ions separated from the second solution To recover sodium chloride.

[0017]

According to the present invention, there is provided a separation means for separating sodium ions, potassium ions, and chloride ions from a mineral solution produced by treating human urine. In a mineral recovery apparatus having a recovery means for recovering sodium chloride from sodium ions, potassium ions, and chloride ions,
The separation means includes an anode and a cathode to which a DC voltage is applied, and two first cation exchange membranes and two first anion exchange membranes, each of which is disposed at a position facing the anode and the cathode. , The first cation exchange membrane and the first cation exchange membrane.
And a second cation exchange membrane and a second anion exchange membrane alternately arranged between the mineral collection apparatus and the mineral collection apparatus.

Further, according to the present invention, there is provided a separation means for separating sodium ions, potassium ions, and chloride ions from a mineral solution produced by treating human urine, and the separated means. In a mineral recovery apparatus having recovery means for recovering sodium chloride from sodium ions, potassium ions, and chloride ions, the recovery means includes: a high-temperature tank provided with a means for heating a supplied solution; and a downstream of the high-temperature tank. A first filter disposed in the first filter for separating solids precipitated in the solution;
A low-temperature tank provided downstream of the filter and provided with a means for cooling the solution; a second filter disposed downstream of the low-temperature tank to separate solids precipitated in the solution; and A mineral recovery apparatus, comprising: a circulating system including a pipe leading to the high-temperature layer; and a condensing crystallization unit having a condensing unit that guides and condenses steam generated in the high-temperature tank. You.

Preferably, in the mineral recovery apparatus, the concentration and crystallization means includes a first pipe for supplying condensed water generated by the condensing means to the first filter and the second filter, And a second pipe for taking out of the circulating system from the first filter and the second filter to the outside of the circulation system.

In the present invention configured as described above,
After separating sodium ions, potassium ions, and chloride ions from a mineral solution formed from urine and having a plurality of mineral components, the sodium chloride is recovered from the sodium ions, potassium ions, and chloride ions, so that chloride from urine wastewater is recovered. It recovers the sodium.

At that time , an ion exchange membrane having a monovalent selectivity is used by using an electrodialysis method, and ion exchange membranes having a monovalent selectivity are alternately installed. By selectively concentrating ions on one side of the ion exchange membrane and diluting them on the other side, monovalent sodium, potassium and chloride ions can be selectively separated from a mineral solution containing multiple mineral components. can do. Further, using a concentration crystallization method utilizing the solubility difference between potassium chloride and sodium chloride, heating the concentrated solution containing sodium ions, potassium ions, and chloride ions separated from the mineral solution to precipitate sodium chloride, Separated, the separated concentrated solution is cooled to separate the precipitated potassium chloride, and the separated concentrated solution is circulated, heated and cooled again, and the separation is repeated to obtain a mineral containing a plurality of mineral components. Sodium chloride can be recovered from sodium ions, potassium ions, and chloride ions previously separated from the solution. In addition, by using the chromatographic separation method using an ion separation column equipped with an ion adsorbent and utilizing the difference in retention time due to the difference in the adsorbability of the adsorbent provided in the ion separation column, multiple mineral components can be used. Sodium chloride can be recovered from sodium ions, potassium ions, and chloride ions separated in advance from a mineral solution containing Furthermore, using an electrodialysis method using an ion exchange membrane having a monovalent selectivity, ion exchange membranes having a monovalent selectivity are alternately installed, and a direct current is applied from both ends to move ions, thereby forming an ion exchange membrane. By performing ion concentration on one side and dilution on the other side, monovalent sodium ions, potassium ions, and chloride ions, which are monovalent ions, can be selectively separated from a mineral solution containing a plurality of mineral components, And, using a concentration crystallization method utilizing the solubility difference between potassium chloride and sodium chloride, the separated sodium chloride is separated by heating the concentrated solution containing the separated sodium ion, potassium ion, and chloride ion, The separated concentrated solution is cooled to separate the precipitated potassium chloride, and the separated concentrated solution is circulated, heated and cooled again, and the separation is repeated. It can be recovered sodium chloride by the. In addition, using an electrodialysis method using an ion exchange membrane having a monovalent selectivity, ion exchange membranes having a monovalent selectivity are alternately installed, and a direct current is applied from both ends thereof to move the ions, thereby forming an ion exchange membrane. By concentrating ions on one side and diluting on the other side, sodium ions, potassium ions, and chloride ions, which are monovalent ions, are selectively separated from a mineral solution containing a plurality of mineral components to form sodium ions. An ion separation column capable of producing a first concentrated solution containing potassium ions and a second concentrated solution containing chloride ions, and using a chromatographic separation method using an ion separation column provided with an ion adsorbent. By utilizing the difference in the retention time due to the difference in the adsorptivity of the adsorbent provided in the inside, the sodium ion and the potassium ion contained in the first concentrated liquid are used. It can be a separate, by mixing the sodium ions and chlorine ions contained in the second concentrate to recover sodium chloride. Further, the mineral solution is divided into a first solution and a second solution, and the first solution and the second solution are subjected to a chromatographic separation method using an ion separation column provided with an ion adsorbent. Using a difference in retention time due to a difference in adsorbability of an adsorbent provided in an ion separation column to separate sodium ions and potassium ions from the first solution, and separate chlorine ions from the second solution. Is separated, sodium ions separated from the first solution and chloride ions separated from the second solution can be mixed to collect sodium chloride.

In the present invention, sodium, potassium and chloride ions are separated from a mineral solution having a plurality of mineral components and containing more potassium ions than sodium ions. By recovering sodium chloride from chlorine ions, sodium chloride can be recovered from a mineral solution containing more potassium ions than sodium ions.

Further, in the present invention, the separation means for performing electrodialysis has two first cation exchange membranes and two first anion exchange membranes at positions opposed to the anode and the cathode, respectively. , The leakage of chlorine ions through the cation exchange membrane can be reduced, the generation of chlorine gas at the anode can be prevented, and the leakage of hydrogen ions in the solution through the anion exchange membrane can be reduced, and the hydrogen gas at the cathode can be reduced. Can be prevented.

In the present invention, the recovery means for performing the concentration crystallization includes a high-temperature tank, a first filter downstream thereof, a low-temperature tank, a second filter downstream thereof, and a second filter from the second filter to the high-temperature tank. By having a circulation system having a pipe and a condensing means for guiding and condensing the vapor generated in the high-temperature tank, the mineral solution supplied to the high-temperature tank can be concentrated.

Further, the condensed water generated by the condensing means is supplied to the first filter and the second filter in a first pipe, and the condensed water is supplied to the first filter and the second filter in a second pipe. By taking out from the circulating system from the above filter, the sodium chloride collected by the first filter can be recovered in the form of a concentrated liquid, and the potassium chloride collected by the second filter can be discharged in the form of a concentrated liquid.

[0027]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. A first embodiment of the present invention will be described with reference to FIG.
FIG. 1 shows a mineral recovery apparatus that performs the mineral recovery method of the present embodiment. In FIG. 1, the mineral recovery device is:
A stock solution tank 101 for storing urine wastewater to be treated, an electrodialysis unit 102 for selectively separating monovalent ions,
It has a concentrated crystallization section 103 for separating Cl and NaCl to recover NaCl.

Urine drainage containing the components shown in FIG. 6 stored in the stock solution tank 101 is supplied to the electrodialysis unit 102. In the electrodialysis unit 102, four ion exchange membranes having monovalent selectivity are arranged, and the arrangement is such that the cation exchange membrane 106 is disposed from the anode 168 side to the cathode 178 side.
The anion exchange membrane 105, the cation exchange membrane 106, and the anion exchange membrane 105 are alternately provided.

The urine wastewater is supplied to a desalting chamber 104 sandwiched between a central anion exchange membrane 105 and a cation exchange membrane 106. At this time, the anode side of the desalting chamber 104 is the anion exchange membrane 105 and the cathode side is the cation exchange membrane 106,
Due to the direct current generated by the anode 168 and the cathode 178, monovalent cations (Na ⁺ , K ⁺ ) in the urine wastewater move to the concentration chamber 107 via the cation exchange membrane 106, and the monovalent anions (Cl ^−). ) Move to the concentration chamber 108 via the anion exchange membrane 105 and are separated from urine wastewater. Concentrate 109 passing through concentration chamber 107 and containing Na ⁺ and K ⁺
passes through the concentrating compartments 108 and a Cl ^- concentrate 10 is included
9b is mixed and mixed to form a concentrated solution 109, which is sent to the concentrated crystallization unit 103. On the other hand, these monovalent ions are removed, that is, the desalted urine wastewater is collected and discharged out of the system. In addition, since an electrolytic reaction occurs in the anode chamber 158 and the cathode chamber 157, a polar liquid different from urine drainage and concentrated liquid is separately circulated and used. From the cation-exchange membrane is installed in the further diaphragm in the anode chamber 158, Cl urine drainage and concentrate in ^- to prevent the occurrence of chlorine gas as entrained electrolyte gas to the anode chamber 158.

Concentrated liquid 109 in concentrated crystallization section 103
Is heated and concentrated by the heater 111 of the high temperature
aCl is precipitated, and the NaCl is collected by the filter 113. The concentrated liquid 115 after the recovery of NaCl is sent to the low temperature section 114 and cooled to precipitate KCl.
Cl is collected by the filter 116. In addition, high temperature section 110
The water vapor 117 generated by evaporation in the above is guided to the condenser 112, condensed and condensed, circulated and reused as raw water to the concentration chambers 107 and 108 of the electrodialysis unit 102. At this time, the condenser 112 further includes an extraction system 118.
To increase the evaporation rate in the high temperature section 110.

In the above, NaCl and KCl performed in the concentration crystallization section 103 of the mineral recovery apparatus according to the present embodiment are described.
The operation of the method for separating and recovering the above will be described with reference to FIG. FIG. 2 shows the solubility curve of the KCl-NaCl system.
In FIG. 2, a thick solid line is a NaCl precipitation line, and a thick dashed line is a KCl precipitation line, and show a line at 90 ° C. and a line at 20 ° C., respectively.

In FIG. 2, Na ⁺ , K ⁺ , and Cl ⁻ contained in the urine drainage and separated by the electrodialysis unit 102 have component ratios such that they are located on a straight line OA connecting the origin O and the point A in the figure. Becomes That is, dissolved NaCl: KCl ≒ 2: 1. Now, for example, the concentrated solution 109 entering the high temperature section 110
Concentration on the OA (NaCl @ 20 g / 100 g)
Water, KCl ≒ 10 g / 100 g water). The concentrated solution 109 is heated to 90 ° C. or higher by the heater 111 and generated steam 117
2 and is further concentrated in the direction of the arrow at a constant concentration ratio, and the NaCl precipitation line (90
℃).

When the concentration is further increased, the KCl concentration further increases, but the NaCl concentration does not further increase and NaCl precipitation starts. As a result, the concentration of the solution does not advance in the negative direction but proceeds on the NaCl precipitation line in the direction of the arrow (KCl concentration ≒ 27.2%, NaCl concentration ≒ 29.2%), and the concentration is stopped. I do. At this time, the contact B between the NaCl deposition line and the KCl deposition line
(KCl concentration ≒ 32.5%, NaCl concentration ≒ 28.
3%), so KCl is still within the solubility range. By the concentration operation so far, NaCl in an amount indicated by → is precipitated. The precipitated NaCl solid is separated by the filter 113, and the concentrated solution 115 is sent to the low temperature section 114.

Next, the concentrate 115 is sent to the low temperature section 114 and cooled to about 20 ° C. Then, only the solubility of KCl decreases without substantially changing the solubility of NaCl, so that the concentration of the concentrated solution 115 progresses almost horizontally to the left toward the KCl precipitation line at 20 ° C. (KCl concentration ≒ 14 .9%). At this time, NaCl
C (concentration of KCl ≒) between the deposition line of KCl and the deposition line of KCl
(15.4%, concentration of NaCl ≒ 29.6%), and this cooling causes precipitation of KCl solids indicated by →. This KCl solid is separated by the filter 116, and the concentrated solution 119 is sent to the high-temperature section 110 again to be concentrated, and the process of →→ is repeated in the same manner.

These operations are repeated several times, and the precipitated NaCl is recovered by the filter 113 each time.
Further, by removing the precipitated KCl by the filter 116 each time, it is completely separated from KCl and
1 can be recovered.

According to this embodiment, the cation exchange membrane 10 having a monovalent selectivity using the electrodialysis method has a monovalent selectivity.
6 and the anion exchange membrane 105 are alternately installed, and the positive electrode 16
8 and the negative electrode 178 to move ions, and concentrate the ions on one side of the ion exchange membrane and dilute the ions on the other side. Therefore, a plurality of mineral components (Na, K, Mg, Ca, , P, S, Cl), the monovalent ions Na ⁺ , K ^+, and Cl ⁻ can be selectively separated from the urine wastewater, and then KCl and Na −
Using concentrated crystallization utilizing the difference in solubility of the Cl, the separated Na ⁺ and K ⁺ and Cl ^- separating the NaCl to concentrate 109 was heated precipitated at high temperature chamber 110 which includes a a filter 113, The separated concentrated solution 115 is cooled in a low-temperature tank 114 and the separated KCl is separated by a filter 116 and separated and separated into a pipe 119.
And repeat heating and cooling and separation again.
Cl can be recovered. In addition, the concentration crystallization device 103 that performs the concentration crystallization is provided with the steam 1 generated in the high-temperature tank 110.
Since the liquid 17 is introduced and condensed by the condenser 112, the concentrated liquid 109 supplied to the high-temperature tank 110 can be concentrated.

A second embodiment of the present invention will be described with reference to FIG. This embodiment is an embodiment of a mineral recovery apparatus having an electrodialysis unit having a different configuration from the mineral recovery apparatus used in the first embodiment. Other points are almost the same as those of the mineral recovery apparatus used in the first embodiment. FIG. 3 shows the electrodialysis unit 202 of the mineral recovery apparatus according to the present embodiment. In FIG. 3, the electrodialysis unit 202 includes an anode 205 and a cathode 204 to which a DC voltage is applied, and two cation exchange membranes 206a and 206b arranged at positions facing the anode 205.
And two anion exchange membranes 207a and 207b disposed at positions facing the cathode 204, the two cation exchange membranes 206a and 206b, and the two anion exchange membranes 20.
7a and 207b, and a cation exchange membrane 206c and an anion exchange membrane 207c alternately arranged. That is, from the anode 205 side to the cathode 204 side, the cation exchange membrane 206a, the cation exchange membrane 206b, the anion exchange membrane 207c, the cation exchange membrane 206c ... anion exchange membrane 207c, the cation exchange membrane 206c , An anion exchange membrane 207b, and an anion exchange membrane 207a. All of these ion exchange membranes have monovalent selectivity.

In the above configuration, the urine drainage 201 is supplied to the desalting chamber 203 of the electrodialysis unit 202. Then, of the monovalent ions Na ⁺ , K ⁺ , and Cl ^{− in} the urine drainage 201 due to the direct current generated by the anode 205 and the cathode 204,
The cations Na ⁺ and K ⁺ are the cation exchange membrane 206b or 20.
Through the 6c, also anions Cl ^- it is passed through an anion exchange membrane 207b or 207c, respectively concentrating chamber 20
Move to 8. These monovalent ions are supplied to the concentration chamber 208
And sent to a concentrated crystallization section (not shown).

The urine drainage from which monovalent ions have been removed by passing through the desalting chamber 203 is collected and discharged out of the system, and a part of the urine drainage is discharged to the inside of the cathode chamber 209 and the anode chamber 21.
0 is supplied to the chamber 212 inside. Note that, similarly to the first embodiment, it is desirable to use a separate circulating solution of the urine drainage / concentrate in the cathode chamber 209 and the anode chamber 210 separately.

As described above, in the first embodiment, the anode 16
By providing the cation exchange membrane 106 on the 8 side and partitioning the anode chamber 158, Cl ⁻ was prevented from moving to the anode 168 side and entering the anode chamber 158. However, this time the selectivity to say that cation exchange membrane small amount while not mean can prevent 100% anion Cl ^- anode chamber 1
58. Therefore, Cl ^{− to} be recovered as NaCl is diffused as chlorine gas at the anode 205, and the amount of recovered NaCl may be reduced accordingly. However, in this embodiment, two cation exchange membranes 206a and 206b are provided on the anode 205 side, and the two cation exchange membranes 206a and 206b are provided.
The chamber 212 enclosed by through desalting 203 ... Cl ^-
The demineralized water 213 after collecting and removing
Cation exchange membrane 206 b, the via 206a Cl ^- in the generation of chlorine gas in to reduce leakage anode 205 can be prevented. Further, at this time, similarly, the anion exchange membrane 207 is used.
The leakage of H ^{+ in} the solution by reducing b and a is reduced and the cathode 20
4 can be prevented from generating hydrogen gas.

The desalinated water 213 is mainly used as a fertilizer for plants, and if NaCl remains at that time, the plants are adversely affected. However, in the present embodiment, a part of the desalinated water 213 is circulated again through the chamber 212 and guided again to the desalination chamber 203 to perform desalination.
Can be reduced.

According to this embodiment, since two cation exchange membranes 206a and 206b are provided on the anode 205 side,
Can prevent the generation of chlorine gas and increase the amount of recovered NaCl. Further, generation of hydrogen gas at the cathode 204 can be prevented. Furthermore, since the residual amount of NaCl can be reduced, there is no adverse effect even when the desalinated water 213 is used as a fertilizer for plants.

A third embodiment of the present invention will be described with reference to FIG. This embodiment is an embodiment of a mineral recovery apparatus having a concentrated crystallization section having a different configuration from the mineral recovery apparatus used in the first embodiment. Other points are almost the same as those of the mineral recovery apparatus used in the first embodiment. FIG. 4 shows a concentrated crystallization section of the mineral recovery apparatus of this embodiment. In FIG. 4, the concentrated crystallization section has a high temperature section 301, a low temperature section 302, filters 303 and 304, and a condenser 305. The flow of the concentrated liquid itself is almost the same as in the first embodiment. That is, the concentrate 30 from the electrodialysis unit (not shown)
6, as in the first embodiment, first supplied to the high temperature section 301, concentrated by heating by the heater 307 and condensation of the water vapor 308 by the condenser 305 to precipitate NaCl, and the concentrated liquid 309 passed through the filter 303. Is sent to the low temperature section 302 and cooled to precipitate KCl solids. After passing through the filter 304, it is again sent to the high temperature section 301 via the pipe 313 and circulated, and the same processing is repeated. At this time, solid NaCl and solid KCl are left on the filters 303 and 304, respectively. In the present embodiment, these precipitates are redissolved in water, collected and discharged. Hereinafter, the details will be described.

In the above-described crystallization procedure, the high-temperature portion 301
The water vapor 308 generated in the above is guided to the condenser 305 and is condensed and condensed.
Stored in 05. In addition, the condenser 305 is connected to the bleeding system 312 to increase the evaporation rate in the high temperature section 301. When a certain amount of NaCl solids and KCl solids accumulate in the filters 303 and 304, the three-way valves 351 to 351 which have been opened in such a direction as to form a flow path through which the concentrated liquid circulates between the circulating high-temperature section 301 and the low-temperature section 302. 354 is switched. That is, the three-way valve 351 moves from the A1 direction to the A2 direction, the three-way valve 352 moves from the B1 direction to the B2 direction, the three-way valve 353 moves from the C1 direction to the C2 direction, and the three-way valve 354 moves to D.
Switching is performed so as to form a flow path from the 1 direction to the D2 direction. This stops the flow of the concentrate. After this,
The condensed water that has been condensed and stored in the condenser 305 is supplied to the filters 303 and 304 by supply pipes 310 and 311, respectively. As a result, the NaCl solid precipitate and the KCl solid precipitate are re-dissolved in the condensed water to form a thick liquid, and the filters 303, 30
4 is taken out of the circulation system consisting of the high-temperature section 301 → the filter 303 → the low-temperature section 302 → the filter 304 → the pipe 313 → the high-temperature section 301 to be recovered / discharged by the recovery system pipe 350 connected downstream of 4.

As described above, the first embodiment shown in FIG. 1 has a configuration in which the crystallized NaCl and KCl are taken out of the filter as solids. For example, in a closed environment system such as outer space, it is desirable that all the mechanisms of the apparatus be automated, but it is very difficult to automate the removal of this solid. However, in this embodiment,
Automation is facilitated by redissolving the precipitated solid and collecting and discharging it as a concentrated solution.

According to the present embodiment, the filters 303 and 3
Condenser 30 with NaCl and KCl precipitated on
Since the condensed water from Step 5 is added and redissolved and these are collected and discharged in the form of a concentrated liquid, the apparatus can be easily automated.

A fourth embodiment of the present invention will be described with reference to FIG. FIG. 5 shows a mineral recovery apparatus that performs the mineral recovery method of the present embodiment. The mineral recovery method of the present embodiment is for separating and recovering NaCl and KCl by a chromatographic separation method. In FIG. 5, the mineral recovery device is:
Cation separation column 401, anion separation column 40
2. It has a cation suppressor 403, an anion suppressor 404, and conductivity measuring devices 405 and 406.
The urine drainage 407 is first split into two systems, a solution 407a and a solution 407b, and the solution 407a is supplied to the cation separation column 401 via an eluent line 408, and the solution 407b
Represents an anion separation column 40 via an eluent line 409
2 is supplied. Then, in the cation separation column 401, N, which is a cation contained in the urine drainage 407a,
a ⁺ , K ⁺ , Ca ²⁺ , Mg ²⁺ are adsorbed by the adsorbent provided in the column, and in the anion separation column 402, Cl ⁻ which is an anion contained in the urine wastewater 407 b is contained in the column. , PO ₄ ³⁻ and SO ₄ ²⁻ are adsorbed on the adsorbent provided in the column. Thus these ions will be separated from the urine drainage 407.

Thereafter, the supply of the urine drainage 407 is temporarily stopped, and the cation separation column 40 is disconnected from the eluent lines 408 and 409.
The eluent is supplied to the 1 and anion separation column 402.
At this time, as the eluent, a liquid that desorbs cations and anions adsorbed on the adsorbent of each separation column in accordance with the properties thereof is used. That is, the cation separation column 401
Uses an acid as an eluent, and an anion separation column 4
In 02, a base is used as an eluent.

When the acid is supplied to the cation separation column 401, the cation once adsorbed is separated and released, but the release mode differs depending on the difference in the adsorption of the ion to the adsorbent. The ions can be separated by adjusting the concentration of the acid. Therefore, if the elution ability is reduced by lowering the concentration of the supplied acid, Na ⁺ ,
Among K ⁺ , Ca ²⁺ and Mg ²⁺ , only monovalent Na ⁺ and K ⁺ are released, and divalent Ca ²⁺ and Mg ²⁺ are not released while adsorbed on the adsorbent. That ^{Na +, K +, Ca 2+} , Na + from Mg ^2+, K ⁺ are separated. At this time, Na ⁺ , K
^{As for +} , K ⁺ is released with a slight delay after Na ⁺ is first released, that is, it is released after being temporally separated. The eluent containing Na ⁺ and K ⁺ is supplied to the downstream suppressor 403.
Supplied to

The suppressor 403 has an anion exchange resin or an anion exchange membrane, and an anion contained in an acid as an eluent (for example, when hydrochloric acid is used as an eluent, C
l ^-) serves to completely remove. As a result, at the outlet of the suppressor 403, only Na ⁺ and K ⁺ flow out in this order.
By detecting the conductivity by measuring the conductivity, and switching the three-way valve 410 in accordance with the timing, the previously released Na ⁺ is supplied to the NaCl recovery system 430, and the later released K ⁺ is K These are separated by discharging to ⁺ discharge system 440.

On the other hand, when the base is supplied to the anion separation column 402, the anions once adsorbed are separated and released. Similarly, if the concentration of the supplied base is lowered to reduce the elution ability, , Cl ⁻ , PO ₄ ³⁻ , and SO ₄ ²⁻ , only monovalent Cl ⁻ is released, and divalent SO ₄ ²⁻ and trivalent PO ₄ ³⁻ are not released while adsorbed on the adsorbent. That Cl ^- is separated ^-, PO ₄ ^3-, Cl from SO ₄ ^2-. The Cl ^- eluent containing is fed to a downstream suppressor 404.

The suppressor 404 has a cation exchange resin or a cation exchange membrane, and completely removes cations contained in a base as an eluent (for example, Na ⁻ when using sodium hydrate as an eluent). Play a role. As a result, only Cl ⁻ flows out at the outlet of the suppressor 404, and this outflow state is detected by measuring the conductivity with the conductivity measuring device 406, and by switching the three-way valve 411, the NaCl is discharged. a recovery system 430 Cl ^- supplies and distributes the ^- appropriate Cl in the discharge system 445.

Therefore, the NaCl recovery system 430 contains N
Since a ⁺ and Cl ^- are supplied, Na ⁺ and Cl ^- can be mixed to recover NaCl.

In the above description, if impurities other than NaCl are contained in salt that human beings eat too much, the human body is adversely affected. Therefore, it is necessary to separate and recover NaCl with as high purity as possible. However, in the first to third embodiments, Na ⁺ , K ⁺ , and Cl ⁻ separated by electrodialysis using a monovalent selective cation / anion exchange membrane are directly recovered by a concentration crystallization method using a difference in solubility. I do. However, the performance of the ion exchange membrane is not strictly perfect, and may contain other ions Ca ²⁺ , Mg ²⁺ , PO ₄ ³⁻ , and SO ₄ ²⁻ which are traces but are not monovalent. In the present embodiment, Na ⁺ ,
Since K ⁺ and Cl ⁻ are separated, high-purity NaCl can be recovered without the risk of contamination as described above.

According to the present embodiment configured as described above,
Urine drainage 407 is divided into solutions 407a and 407b,
Using a chromatographic separation method using a cation separation column 401 and an anion separation column 402 equipped with an ion adsorbent, the difference in adsorptivity of the adsorbent provided inside the cation separation column 401 and the anion separation column 402 Is used to separate Na ⁺ and K ⁺ from the solution 407a and Cl ⁻ from the solution 407b, so that Na ⁺ and the solution 407b are separated from the solution 407a.
Cl separated from ^- and can be mixed to recover NaCl. In the chromatographic separation method, Na ⁺ ,
K ⁺ , Cl ^- are separated and other ions (Ca
^2+, since there is no risk of contamination of So4 ^2-like), it can be recovered with high purity NaCl.

A fifth embodiment of the present invention will be described with reference to FIG. FIG. 6 shows a mineral recovery apparatus for performing the mineral recovery method of this embodiment. The method for recovering minerals of this embodiment is as follows.
NaCl and KC using electrodialysis and chromatographic separation
1 for separation and recovery. The mineral collecting device is an electrodialysis unit 10 of the mineral collecting device of the first embodiment.
2 has an electrodialysis unit 501 and a chromatographic separation unit 502 having substantially the same configuration as that of the second embodiment. The flow of the solution in the electrodialysis unit 501 is the same as in the first embodiment. That is, urine wastewater is supplied to the desalination chamber 503, and Na ⁺ , K ⁺
Moves to the cation concentration chamber 506 via the cation exchange membrane 505 and is separated from the urine wastewater, and Cl ⁻ in the urine wastewater moves to the anion concentration chamber 508 via the anion exchange membrane 507 to be separated from the urine wastewater. Separated cation concentrate 509 containing Na ⁺ and K ⁺ and anion concentrate 51 containing Cl ⁻
0 are separately sent to the chromatographic separation unit 502.

The chromatographic separation unit 502 has a cation separation column 511, an anion separation column 512, a cation suppressor 513, an anion suppressor 514, and conductivity measuring devices 515 and 516. Cation concentrate 5
09 and the anion concentrate 510 are supplied to the eluent line 517.
Or 518 via the cation separation column 511 or the anion separation column 512, respectively. Then, in the cation separation column 511, the cation concentrate 5
Na ⁺ contained in 09, K ⁺ is adsorbed, and in the anion separation column 512, Cl contained in the anion concentrate 510 ^- is adsorbed.

Thereafter, the supply of the cation concentrate 509 and the anion concentrate 510 is temporarily stopped, and the eluent lines 517, 5
From 18, the eluent is supplied to the cation separation column 511 and the anion separation column 512. At this time, as the eluent, an acid is used in the cation separation column 511 and a base is used in the anion separation column 512, as in the fourth embodiment.

When an acid adjusted to a predetermined concentration in advance is supplied to the cation separation column 511 in the same manner as in the fourth embodiment, Na ⁺ and K once adsorbed due to the difference in the adsorbability of ions to the adsorbent. ⁺ Are released temporally in this order. At this time, Ca ²⁺ and Mg ²⁺ slightly mixed into the cation concentrate 509 via the cation exchange membrane 505 of the electrodialysis unit 501 are not released while being adsorbed. Na
^The eluent containing ⁺ and K ⁺ is supplied to the downstream suppressor 513.

The suppressor 513 has an anion exchange resin or an anion exchange membrane and completely adsorbs and removes anions contained in the eluent acid. At the outlet of the suppressor 513, only Na ⁺ and K ⁺ are in this order. And separated out temporally. This outflow state is detected by measuring the conductivity with a conductivity measuring device 515, and by switching the three-way valve 550 in accordance with the timing, the previously released Na ⁺ is supplied to the NaCl recovery system 530, The K ⁺ released later is supplied to the KCl discharge system 540.

On the other hand, in the same manner as in the fourth embodiment, the base adjusted to a predetermined concentration in advance is replaced with an anion separation column 512.
When supplied to, Cl once adsorbed ^- is released is separated, PO ₄ ^3- slightly mixed into the anionic concentrate 510 through the anion exchange membrane 507 of the electrodialysis unit 501,
SO ₄ ^2- is not released while adsorbed. It separated Cl ^- eluent containing is fed to a downstream suppressor 514.

The suppressor 514 has a cation exchange resin or a cation exchange membrane, completely adsorbs and removes the cation contained in the base as the eluent, and only Cl ⁻ flows out at the outlet of the suppressor 513. This outflow state is detected by measuring the conductivity with a conductivity measuring device 516, and by switching the three-way valve 550, NaC is detected.
appropriate Cl in the l recovery system 530 and KCl discharge system 540 ^- that is partitioned by supplying and discharging.

Therefore, the NaCl recovery system 530 contains N
a ⁺ and Cl ^- are supplied.
Can be recovered.

In the above, in the fourth embodiment,
Although it was possible to recover NaCl from urine wastewater only by the chromatographic method, C
l ⁻ , Na ⁺ entering the anion separation column 402 was separated and removed by the suppressors 403 and 404 and could not be recovered, and the recovery rate of NaCl was reduced to less than half. However, in the present embodiment, such a difficulty can be solved by using the electrodialysis method and the chromatographic method in combination, so that the recovery rate can be improved.

According to the present embodiment, cation exchange membranes 505 and anion exchange membranes 507 having a monovalent selectivity are alternately installed by using an electrodialysis method, and direct current is applied from the anode and the cathode to move the ions. Since ions are concentrated on one side of the ion exchange membrane and diluted on the other side, monovalent ions Na ⁺ , K ⁺ and C are extracted from urine wastewater containing a plurality of mineral components.
l ^- and selectively separated cations concentrate 509 and Cl comprising the Na ⁺ and K ⁺ to ^- can be generated and anion concentrate 510 containing, and using a chromatographic separation method, the cation separation Since the difference in retention time due to the difference in adsorbability of the adsorbents provided in the column 511 and the anion separation column 512 is used, the Na ⁺ contained in the cation concentrate 509 is used.
And K ⁺ are separated, and Na ⁺ can be recovered by mixing Na ⁺ and Cl ⁻ contained in the anion concentrate 510. In addition, since the cation concentrate 509 and the anion concentrate 510 separated in advance in the electrodialysis unit 501 are supplied to the chromatographic separation unit 502 to recover NaCl, compared with the case where the chromatographic separation method is used without performing the separation in advance. Recovery rate can be improved.

[0066]

According to the present invention, sodium, potassium and chloride ions are separated from a mineral solution formed from urine and having a plurality of mineral components, and then separated from the sodium, potassium and chloride ions. Sodium can be recovered.

Since the electrodialysis method using an ion exchange membrane having a monovalent selectivity is used, it is possible to selectively separate monovalent sodium ions, potassium ions and chloride ions from a mineral solution. it can. Furthermore, since the concentration crystallization method using the solubility difference between potassium chloride and sodium chloride is used, sodium chloride can be recovered from sodium ions, potassium ions, and chloride ions separated in advance. Further, since a chromatographic separation method using an ion separation column provided with an ion adsorbent is used, sodium chloride can be recovered from sodium ions, potassium ions, and chloride ions separated in advance. Furthermore, since the electrodialysis method using an ion exchange membrane having monovalent selectivity is used, sodium ions, potassium ions and chloride ions, which are monovalent ions, are selectively separated from a mineral solution containing a plurality of mineral components. Since the concentration crystallization method using the solubility difference between potassium chloride and sodium chloride is used, sodium chloride can be recovered from the separated sodium ion, potassium ion, and chloride ion. Further, since an electrodialysis method using an ion exchange membrane having monovalent selectivity is used, monovalent ions are selectively separated from a mineral solution containing a plurality of mineral components to selectively contain sodium ions and potassium ions. Since the first concentrated solution and the second concentrated solution containing chloride ions can be generated and the chromatographic separation method using an ion separation column provided with an ion adsorbent is used, the first concentrated solution is contained in the first concentrated solution. The sodium ions can be separated from the potassium ions and the sodium ions can be mixed with the chloride ions contained in the second concentrate to recover sodium chloride. Further, since the sodium chloride is recovered by the chromatographic separation method after being separated into the first concentrated liquid and the second concentrated liquid by the electrodialysis method in advance, the recovery rate is higher than when the chromatographic separation method is used without performing the separation in advance. Can be improved.

Further, the first solution and the second solution are separated by a chromatographic separation method using an ion separation column equipped with an ion adsorbent from the first solution to separate sodium ions and potassium ions from the first solution and the second solution. Since the chloride ions are separated from the solution 2, the sodium ions separated from the first solution and the chloride ions separated from the second solution can be mixed to collect sodium chloride.
In addition, in the chromatographic separation method, sodium ions, potassium ions, and chloride ions are completely separated, and there is no risk of other ions being mixed due to incomplete selection by the membrane that occurs when using an ion exchange membrane, so that the purity is high. Sodium chloride can be recovered.

According to the present invention, sodium, potassium and chloride ions are separated from a mineral solution having a plurality of mineral components and containing more potassium ions than sodium ions. And chloride ions to recover sodium chloride.

Further, according to the present invention, the separation means for performing electrodialysis has two first cation exchange membranes and two first anion exchange membranes at positions opposed to the anode and the cathode, respectively. Chlorine ion leakage through the cation exchange membrane can be reduced, preventing the generation of chlorine gas at the anode,
In addition, leakage of hydrogen ions in the solution through the anion exchange membrane can be reduced, and generation of hydrogen gas at the cathode can be prevented.
Further, since the residual amount of sodium chloride can be reduced, there is no adverse effect even if the treated urine wastewater is used as a plant fertilizer.

Further, according to the present invention, since the vapor generated in the high-temperature tank is guided to the condensing means and condensed, the mineral solution supplied to the high-temperature tank can be concentrated.

Further, since the condensed water is supplied to the first filter and the second filter and then taken out of the circulation system, the collected sodium chloride can be recovered in the form of a concentrated solution, and the concentrated sodium chloride can be recovered in the form of a concentrated solution. Can be discharged. Therefore, automation of this device becomes easy.

Further, since the condensed water is supplied to the first filter and the second filter and then taken out of the circulation system, the collected sodium chloride can be recovered in the form of a concentrated solution, and the concentrated sodium chloride can be recovered in the form of a concentrated solution. Can be discharged. Therefore, automation of this device becomes easy.

[Brief description of the drawings]

FIG. 1 is an overall structural diagram of an apparatus for performing a mineral recovery method according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a solubility curve of a KCl-NaCl system.

FIG. 3 is a view showing an electrodialysis unit of a mineral recovery apparatus according to a second embodiment of the present invention.

FIG. 4 is a view showing a concentration crystallization section of a mineral recovery apparatus according to a third embodiment of the present invention.

FIG. 5 is an overall structural view of an apparatus for performing a mineral recovery method according to a fourth embodiment of the present invention.

FIG. 6 is an overall structural view of an apparatus for performing a mineral recovery method according to a fifth embodiment of the present invention.

FIG. 7 is a diagram showing components of seawater.

FIG. 8 is a diagram showing components of urine drainage.

[Explanation of symbols]

 102 Electrodialysis section 103 Concentration and crystallization section 105 Anion exchange membrane 106 Cation exchange membrane 109a, b Concentrate 201 Urine drainage 202 Electrodialysis section 204 Negative electrode 205 Positive electrode 206a-c Cation exchange membrane 207a-c Anion exchange Membrane 301 High-temperature tank 302 Low-temperature tank 303 Filter 304 Filter 305 Condenser 306 Concentrate 307 Heater 310 Supply system piping (first piping) 311 Supply system piping (first piping) 313 piping 350 Recovery piping (second piping) 401 Cation separation column 402 Anion separation column 403 Cation suppressor 404 Anion suppressor 407 Urine drainage 501 Electrodialysis unit 505 Cation exchange membrane 507 Anion exchange membrane 509 Cation concentrate 510 Anion concentrate 511 Cation separation column 512 anion separation column 513 cation suppressor 514 anion suppressor

────────────────────────────────────────────────── ─── Continued on the front page (51) Int.Cl. ⁶ Identification symbol FI C01D 3/14 C01D 3/14 C02F 1/42 C02F 1/42 B 1/469 1/46 103 (72) Inventor Toshio Sawa Ibaraki 7-2-1, Omika-cho, Hitachi, Japan Hitachi Energy Co., Ltd. Energy Research Laboratory (56) Reference JP-A-50-81993 (JP, A) JP-A-51-78553 (JP, A) JP-A-57- 35989 (JP, A) JP-A-58-205501 (JP, A) JP-A-54-77281 (JP, A) JP-A-52-32880 (JP, A) JP-A-7-232983 (JP, A) JP-B-42-14699 (JP, B1) (58) Field surveyed (Int. Cl. ⁶ , DB name) B01D 61/44-61/54 B01D 9/02 B01D 15/08 C01D 3/04-3 / 16 C01D 3/14-3/16 C02F 1/42-1/469

Claims (9)

(57) [Claims] A sodium ion as claimed in claim 1] even without low, and potassium ions, from said mineral solution having a plurality of mineral components containing chlorine ions and the sodium ions and the potassium ions by separating the chlorine ions, and the sodium ion in Rumi Neraru recovery method to recover sodium chloride and potassium ions and chloride ions, an electrodialysis method using an ion exchange membrane having a monovalent selectivity
The sodium ion and the potassium ion
Separating the chloride ions from the mineral solution
A method for recovering minerals . 2. At least sodium ion and potassium
Has multiple mineral components including ions and chloride ions.
The sodium ion and the potassium
Sodium ion and the chlorine ion
Nato chloride from muon, potassium ion and chloride ion
In a mineral recovery method for recovering lithium, recovering sodium chloride by a concentrated crystallization method using a solubility difference between potassium chloride and sodium chloride from sodium ions, potassium ions, and chloride ions separated from the mineral solution. Characteristic mineral recovery method. 3. At least sodium ion and potassium
Has multiple mineral components including ions and chloride ions.
The sodium ion and the potassium
Sodium ion and the chlorine ion
Nato chloride from muon, potassium ion and chloride ion
In a mineral recovery method for recovering lithium, sodium chloride is recovered from sodium ions, potassium ions, and chloride ions separated from the mineral solution by a chromatographic separation method using an ion separation column provided with an ion adsorbent. Mineral recovery method. 4. At least sodium ion and potassium
Has multiple mineral components including ions and chloride ions.
The sodium ion and the potassium
Sodium ion and the chlorine ion
Nato chloride from muon, potassium ion and chloride ion
In a mineral recovery method for recovering lithium, the sodium ion, the potassium ion, and the chloride ion are separated from the mineral solution by an electrodialysis method using an ion exchange membrane having monovalent selectivity, and the sodium ion and the potassium ion are separated. A mineral recovery method, comprising recovering sodium chloride from a mixed solution of ions and chloride ions by a concentrated crystallization method utilizing a difference in solubility between sodium chloride and potassium chloride. 5. At least sodium ion and potassium
Has multiple mineral components including ions and chloride ions.
The sodium ion and the potassium
Sodium ion and the chlorine ion
Nato chloride from muon, potassium ion and chloride ion
In a mineral recovery method for recovering lithium, the sodium ions, the potassium ions, and the chloride ions are separated from the mineral solution by electrodialysis using an ion exchange membrane having monovalent selectivity, and sodium ions and potassium ions are separated. And a second concentrated solution containing chloride ions, and then contained in the first concentrated solution by a chromatographic separation method using an ion separation column equipped with an ion adsorbent. Separating the sodium ions and the potassium ions, and mixing the sodium ions with the chloride ions contained in the second concentrated solution to recover sodium chloride. 6. At least sodium ion and potassium
Has multiple mineral components including ions and chloride ions.
The sodium ion and the potassium
Sodium ion and the chlorine ion
Nato chloride from muon, potassium ion and chloride ion
In a mineral recovery method for recovering lithium, the mineral solution is divided into a first solution and a second solution, and ions are separated from the first solution by a chromatographic separation method using an ion separation column provided with an adsorbent. After separating the sodium ion and the potassium ion and separating the chloride ion from the second solution, the sodium ion separated from the first solution and the second ion are separated from the second solution.
And recovering sodium chloride by mixing with chloride ions separated from the solution. 7. Separation means for separating sodium ions, potassium ions and chloride ions from a mineral solution produced by treating human urine, and separating sodium chloride from the separated sodium ions, potassium ions and chloride ions. In a mineral recovery apparatus having a recovery means for recovering, the separation means comprises: an anode and a cathode to which a DC voltage is applied; and two first anodes each of which is disposed at a position facing the anode and the cathode. An ion exchange membrane, a first anion exchange membrane, the first cation exchange membrane, and the first
A mineral collection device, characterized in that the device is an electrodialysis unit having a second cation exchange membrane and a second anion exchange membrane alternately arranged between the anion exchange membrane and the anion exchange membrane. 8. A separation means for separating sodium ions, potassium ions and chloride ions from a mineral solution produced by treating human urine, and sodium chloride from the separated sodium ions, potassium ions and chloride ions. In a mineral recovery apparatus having a recovery means for recovering, the recovery means is provided with a high-temperature tank provided with a means for heating the supplied solution, and a second means disposed downstream of the high-temperature tank and separating a solid precipitated in the solution. A first filter, a low-temperature tank provided downstream of the first filter and provided with a means for cooling the solution, and a second filter disposed downstream of the low-temperature tank and separating solids precipitated in the solution. And the second
A mineral collection device, comprising: a circulating system including a pipe leading from the filter to the high-temperature layer; and a condensing unit that guides and condenses steam generated in the high-temperature tank. . 9. The mineral recovery apparatus according to claim 8 , wherein the concentration crystallization means supplies a condensed water generated by the condensation means to the first filter and the second filter, A second pipe for taking out the condensed water from the first filter and the second filter to the outside of the circulating system.