Marine mineral extraction and concentration process

Abstract

The invention belongs to the technical field of extraction of marine minerals, and discloses an extraction and concentration process of marine minerals, which comprises the following steps: step 1, collecting a stock solution: collecting the stock solution by using a collecting water tank; 2, stock solution treatment, wherein raw material liquid is treated through a multi-medium filter and a resin exchanger; 3, evaporation and concentration, wherein the treated stock solution enters an evaporation kettle to be evaporated; step 4, centrifugal collection: a multi-medium filter can effectively intercept suspended impurities and prevent the suspended impurities from depositing in the equipment; the softening resin exchanger can remove calcium and magnesium ions, reduce seawater hardness and reduce scaling substances generated by ionic reaction, the scaling phenomenon of a concentration tank and a pipeline is greatly reduced through combination of the two, the smooth evaporation and concentration process is guaranteed, the equipment blockage risk is reduced, the cleaning and maintenance cost is reduced, and the service life of the equipment is prolonged; the seawater evaporation and concentration efficiency and stability are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of marine mineral extraction, and particularly relates to an extraction and concentration process for marine minerals. Background Art

[0002] Marine minerals have extensive application values in the fields of biology, medicine, and industry. With the improvement of people's requirements for health and quality of life, the macro and trace elements in the ocean have gradually attracted great attention from scientific research institutions and enterprises. In recent years, with the progress of technology, various new extraction and concentration technologies based on physical and chemical means have emerged. These new technologies have greatly improved the extraction efficiency and product purity of minerals and reduced production costs.

[0003] However, the current extraction and concentration process has the following disadvantages. Since seawater is rich in calcium, magnesium ions, etc., and some suspended impurities, during the evaporation and concentration process, due to the presence of these substances, scaling will occur in the concentration tank or pipeline. Summary of the Invention

[0004] In view of the problem in the prior art that due to the richness of calcium, magnesium ions, etc., and some suspended impurities in seawater, scaling will occur in the concentration tank or pipeline during the evaporation and concentration process, the present invention proposes the following technical solutions:

[0005] An extraction and concentration process for marine minerals, comprising the following steps:

[0006] Step 1: Stock solution collection: collecting the stock solution using a collection water tank;

[0007] Step 2: Stock solution treatment: treating the raw material liquid through a multi-media filter and a resin exchanger;

[0008] Step 3: Evaporation and concentration: feeding the treated stock solution into an evaporation kettle for evaporation;

[0009] Step 4: Centrifugal collection: conveying the mixed solution that has completed evaporation and concentration in the evaporation kettle to a high-speed centrifuge through a pipeline for treatment;

[0010] Step 5: Freezing crystallization: transferring the concentrated marine mineral precipitate retained in the centrifuge to a crystallization tank, and cooling the crystallization tank using a chiller;

[0011] Step 6: Secondary centrifugation: conveying the mixture that has settled statically in the crystallization tank to another dedicated centrifuge through a pipeline to form secondary centrifugation treatment;

[0012] Step 7: Reflux: conveying the mother liquor collected after secondary centrifugation to the inside of the freezing crystallization for secondary crystallization;

[0013] The evaporation kettle in step three includes: a housing, which serves as the overall framework of the evaporation kettle;

[0014] A gas-liquid separator, connected to the top edge of the housing, for gas-liquid separation;

[0015] A driving structure, connected to the middle of the top of the housing;

[0016] A stirring rod, connected to the driving structure;

[0017] Stirring blades, connected to the stirring rod, and the driving structure drives the stirring blades to rotate through the stirring rod;

[0018] A compensation component: including a protective cover, an inner partition sleeve, a barrier member, a tension reset structure, and a pushing structure;

[0019] The protective cover is connected to the stirring rod, the inner partition sleeve is connected to the protective cover, the barrier member is connected to the inner partition sleeve, the tension reset structure is connected between the inner partition sleeve and the barrier member, the pushing structure is connected to the bottom end of the barrier member, and the tension reset structure drives the barrier member to move between the inner wall of the protective cover and the outside of the inner partition sleeve and drives the pushing structure to compress.

[0020] Preferably, as the above technical solution, the driving structure is fixedly installed on the top of the housing, the stirring rod is connected to the output end of the driving structure, the stirring rod penetrates through the top of the housing, a feed port is opened on one side of the top of the housing, a connecting pipe is embedded and installed on the top of the outer surface of the housing, one end of the connecting pipe is connected to a vacuum pump, and pipes are symmetrically embedded and installed at the bottom of the outer surface of the housing, and one of the pipes is an air outlet pipe and the other pipe is an air inlet pipe.

[0021] Preferably, as the above technical solution, a steam pipe is installed between the vapor-liquid separator and the housing, the outlet end of the steam pipe is connected to the inlet end of the vapor-liquid separator, the discharge end of the vapor-liquid separator is connected to a return pipe, one end of the return pipe is embedded and installed at the top of the outside of the housing, and the outlet end of the vapor-liquid separator is connected to a condenser through a pipe.

[0022] Preferably, as the above technical solution, the tension reset structure includes:

[0023] A mounting block, connected to the inner partition sleeve;

[0024] A spring member, connected to the mounting block;

[0025] A rectangular block, connected to the spring member;

[0026] A mounting strip, connected to the rectangular block;

[0027] The push rod is connected to the mounting strip through the rectangular block;

[0028] The limiting plate is connected to the push rod through the rectangular block;

[0029] The spring member drives the mounting strip to displace through the rectangular block, and the mounting strip drives the push rod to deflect along the inside of the limiting plate through the rectangular block.

[0030] As a preference of the above technical solution, the pushing structure includes:

[0031] The lifting ring is connected to the bottom end of the barrier member;

[0032] The lifting column is connected to the top end of the lifting ring;

[0033] The fixed sleeve is sleeved outside the lifting column and is connected to the protective cover.

[0034] As a preference of the above technical solution, the pushing structure further includes:

[0035] The triangular ring is connected to the fixed sleeve;

[0036] The extrusion ring is connected to the protective cover, and the barrier member moves between the extrusion ring and the triangular ring.

[0037] As a preference of the above technical solution, liquid inlet pipes are equidistantly embedded and installed at the top end of the protective cover, and liquid discharge pipes are equidistantly embedded and installed at the bottom end of the protective cover. The opening directions of the liquid discharge pipes and the liquid inlet pipes are opposite to the rotation direction of the protective cover.

[0038] As a preference of the above technical solution, a disc is snap-fitted and installed at the top end of the lifting column. The outer diameter of the disc is equal to the maximum outer diameter of the lifting column, and the shape of the lifting column is T-shaped.

[0039] As a preference of the above technical solution, a support frame is installed on the outer side of the housing, and a ladder is installed at one end of the support frame.

[0040] The beneficial effects of the present invention are:

[0041] (1) The multi-media filter can effectively intercept suspended impurities and prevent them from depositing in the equipment; the softening resin exchanger can remove calcium and magnesium ions, reduce the hardness of seawater, and reduce the scaling substances generated by ion reactions. The combination of the two greatly reduces the scaling phenomenon in the concentration tank and pipelines, ensures the smoothness of the evaporation and concentration process, reduces the risk of equipment blockage, reduces the cleaning and maintenance costs, prolongs the service life of the equipment, and improves the efficiency and stability of seawater evaporation and concentration;

[0042] (2) The elastic reset and mechanical transmission structure built into the device can automatically trigger the deformation and displacement of the barrier according to the liquid level drop and pressure change during the evaporation process, dynamically adjust the liquid level in the kettle, ensure that the raw material liquid always fully covers the heating area, avoid the decrease in heat exchange efficiency caused by insufficient liquid level, and effectively improve the heat utilization rate and evaporation effect;

[0043] (3) During the process of liquid level rising and falling, the barrier moves through the special structure area of the triangular ring along with the structure, and the triangular ring automatically scrapes and cleans the outside of the barrier, timely removing the mineral crystals that may adhere, reducing the frequency of manual maintenance, reducing the risk of equipment failure, ensuring the long-term stable operation of the equipment, and extending the service life of key components. Description of the Drawings

[0044] Figure 1 Shows the structural schematic diagram of a process for extracting and concentrating marine minerals in Embodiment 1;

[0045] Figure 2 Shows the cross-sectional view of the outer shell in Embodiment 1;

[0046] Figure 3 Shows the structural schematic diagram of the installation of the stirring blade in Embodiment 1;

[0047] Figure 4 Shows the cross-sectional view of the protective cover in Embodiment 1;

[0048] Figure 5 Shows the structural schematic diagram of the installation of the spring member in Embodiment 1;

[0049] Figure 6 Shows the structural schematic diagram of the installation of the disc in Embodiment 1.

[0050] In the figure: 1. Outer shell; 2. Vapor-liquid separator; 3. Driving structure; 4. Stirring rod; 51. Protective cover; 52. Inner partition sleeve; 53. Mounting block; 54. Spring member; 55. Mounting strip; 56. Pushing rod; 57. Limiting plate; 58. Lifting ring; 59. Lifting column; 510. Fixed sleeve; 511. Triangular ring; 512. Extrusion ring; 513. Barrier; 514. Groove; 515. Liquid inlet pipe; 516. Liquid discharge pipe; 517. Flow guide groove; 518. Rectangular block; 519. Disc; 6. Steam pipe; 7. Return pipe; 8. Stirring blade. Detailed Embodiment

[0051] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0052] Embodiment 1

[0053] The present invention provides an extraction and concentration process for marine minerals, as Figures 1 to 6 shown, including the following steps:

[0054] Step 1: Stock solution collection: Use a collection water tank to collect the stock solution;

[0055] Step 2: Stock solution treatment: The raw material liquid is treated by a multi-media filter and a resin exchanger;

[0056] Step 3: Evaporation and concentration: The treated stock solution enters the evaporation kettle for evaporation;

[0057] Step 4: Centrifugal collection: The mixed solution that has completed evaporation and concentration in the evaporation kettle is transported through a pipeline to a high-speed centrifuge for treatment;

[0058] Step 5: Freezing crystallization: Transfer the concentrated marine mineral precipitate retained in the centrifuge to a crystallization tank, and use a chiller to cool the crystallization tank;

[0059] Step 6: Secondary centrifugation: The mixture that has settled statically in the crystallization tank is transported through a pipeline to another dedicated centrifuge for secondary centrifugation treatment;

[0060] Step 7: Recycling: The mother liquor collected after secondary centrifugation is transported through a pipeline to the inside of the freezing crystallization for secondary crystallization.

[0061] The evaporation kettle in Step 3 includes: a housing 1, a vapor-liquid separator 2, a driving structure 3, a stirring rod 4, stirring blades 8, and a compensation component; the housing 1 serves as the overall framework of the evaporation kettle; the vapor-liquid separator 2 is connected to the top edge of the housing 1 for gas-liquid separation; the driving structure 3 is connected to the middle of the top of the housing 1; the stirring rod 4 is connected to the driving structure 3; the stirring blades 8 are connected to the stirring rod 4, and the driving structure 3 drives the stirring blades 8 to rotate through the stirring rod 4; the compensation component: includes a protective cover 51, an inner partition sleeve 52, a barrier member 513, a tension reset structure, and a pushing structure; the protective cover 51 is connected to the stirring rod 4, the inner partition sleeve 52 is connected to the protective cover 51, the barrier member 513 is connected to the inner partition sleeve 52, the tension reset structure is connected between the inner partition sleeve 52 and the barrier member 513, and the pushing structure is connected to the bottom end of the barrier member 513. The tension reset structure drives the barrier member 513 to move between the inner wall of the protective cover 51 and the outside of the inner partition sleeve 52 and drives the pushing structure to compress.

[0062] Under the action of steam and vacuum, the raw material liquid is evaporated. During the evaporation process of the raw material liquid, the liquid level drops. At this time, some heating areas cannot come into contact with the raw material liquid. Under the action of the compensation component, the structure inside the compensation component expands, thereby squeezing the raw material liquid and causing the raw material liquid to rise. As a result, the heating area can heat the raw material liquid comprehensively, preventing the problem of waste of heat resources caused by the inutilization of some heating areas. Moreover, this method extracts marine minerals by physical means.

[0063] During use, the raw material liquid enters the interior of the outer shell 1 along the feed port. At this time, the vacuum pump evacuates the interior of the outer shell 1. When the raw material liquid reaches a pre-determined height inside the outer shell 1, steam is injected into the interlayer of the outer shell 1 through the air outlet pipe. Under the action of steam and vacuum, the raw material liquid is evaporated. The gas during the evaporation process enters the gas-liquid separator 2. At this time, the gas-liquid separator 2 separates the gas, and the gas is discharged along the gas-liquid separator 2, while the liquid flows back again along the bottom end of the gas-liquid separator 2. At the same time, the driving structure 3 is connected to the power supply and starts to operate. When the driving structure 3 operates, it drives the stirring blades 8 to rotate through the stirring rod 4. When the stirring blades 8 rotate, they agitate the raw material liquid. At the same time, during the heating process, the height of the raw material liquid drops, thereby reducing the pressure on the barrier 513 and further reducing the pressure on the tension reset structure. At this time, the tension reset structure resets and drives the barrier 513 to move. When the barrier 513 moves, it drives the pushing structure to stretch, so that the occupied area of the barrier 513 increases. When the occupied area of the barrier 513 increases, it pushes the raw material liquid inside the protective cover 51 to move outward. At this time, the raw material liquid rises, thus achieving the goal of increasing the full contact between the raw material liquid and the heating area and improving the heating efficiency.

[0064] Specifically, a feed inlet is provided on one side of the top end of the outer shell 1. The feed inlet is used to inject raw material liquid into the interior of the outer shell 1. A connecting pipe is embedded and installed at the top of the outer surface of the outer shell 1. One end of the connecting pipe is connected to a vacuum pump, and the vacuum pump is used to evacuate the interior of the outer shell 1. Two pipes are symmetrically embedded and installed at the bottom of the outer surface of the outer shell 1. One of the pipes is an air outlet pipe, and the other pipe is an air inlet pipe. The air inlet pipe is connected to a steam generator. A partition layer is provided at the bottom of the outer surface of the outer shell 1. The air outlet end of the air outlet pipe is located inside the partition layer. A steam pipe 6 is embedded and installed at the top end of the outer surface of the outer shell 1. The air outlet end of the steam pipe 6 is connected to the air inlet end of the steam-liquid separator 2. The discharge end of the steam-liquid separator 2 is connected to a reflux pipe 7. One end of the reflux pipe 7 is embedded and installed at the top end outside the outer shell 1. The air outlet end of the steam-liquid separator 2 is connected to a condenser through a pipe. The steam-liquid separator 2 is used to filter the discharged steam to separate gas and liquid. A driving structure 3 is fixedly installed at the top end of the outer shell 1. The output shaft of the driving structure 3 is connected to a stirring rod 4. The stirring rod 4 penetrates through the top end of the outer shell 1. Stirring blades 8 are clamped and installed at the bottom of the outer side of the stirring rod 4. A protective cover 51 is welded at the position of the top end of the stirring blade 8 on the outer side of the stirring rod 4. An inner partition sleeve 52 is welded inside the protective cover 51. The inner partition sleeve 52 is sleeved on the outer side of the stirring rod 4. A blocking member 513 is provided between the outer side of the inner partition sleeve 52 and the inside of the protective cover 51. A tension reset structure is provided on the inner wall of the blocking member 513 at the position outside the inner partition sleeve 52. A pushing structure is provided at the position of the bottom end of the blocking member 513 inside the protective cover 51. A support frame is installed outside the outer shell 1. A ladder is installed at one end of the support frame to facilitate personnel to enter the outside of the outer shell 1. A discharge pump is installed at the bottom end of the outer shell 1 to discharge the raw material liquid inside the outer shell 1.

[0065] In the present invention, the driving structure 3 belongs to a structure for driving an object to rotate, specifically a driving motor. The blocking member 513 belongs to a structure for blocking liquid, specifically an elastic membrane, which is made of a composite material of fluororubber and polytetrafluoroethylene.

[0066] As Figure 4 and Figure 6 shown, the pushing structure includes: a lifting ring 58, a lifting column 59, a fixed sleeve 510, a triangular ring 511, and an extrusion ring 512; the lifting ring 58 is connected to the bottom end of the blocking member 513; the lifting column 59 is connected to the top end of the lifting ring 58; the fixed sleeve 510 is sleeved on the outer side of the lifting column 59 and is connected to the protective cover 51; the triangular ring 511 is connected to the fixed sleeve 510; the extrusion ring 512 is connected to the protective cover 51, and the blocking member 513 moves along between the extrusion ring 512 and the triangular ring 511.

[0067] Since the blocking member 513 needs to be reset during the process of excessive liquid pressure, at this time, under the action of the pushing structure, the blocking member 513 is reset, which changes the reset difficulty of the blocking member 513, and the outside is cleaned during the reset process of the blocking member 513.

[0068] During use, due to the action of gravity, the lifting column 59 moves downward inside the fixed sleeve 510. At this time, the lifting ring 58 is driven to move downward. When the lifting ring 58 moves downward, the blocking member 513 is driven to move. The blocking member 513 moves between the triangular ring 511 and the extrusion ring 512. At this time, the outer side of the blocking member 513 is cleaned by the triangular ring 511 to prevent crystals from adhering to the outer side of the blocking member 513.

[0069] Specifically, the bottom end of the blocking member 513 is fixedly connected to the lifting ring 58. A groove 514 is formed in the inner wall of the protective cover 51 corresponding to the outer side of the lifting ring 58. The outer and inner sides of the groove 514 are in mutual fit with the outer and inner rings of the lifting ring 58. The top end of the lifting ring 58 is equidistantly clamped and installed with lifting columns 59. The top end of the lifting column 59 is clamped and installed with a disc 519. The outer diameter of the disc 519 is equal to the maximum outer diameter of the lifting column 59. The shape of the lifting column 59 is T-shaped. The disc 519 increases the overall gravity of the lifting column 59. The outer side of the lifting column 59 is sleeved with a fixed sleeve 510. The fixed sleeve 510 is clamped and installed inside the protective cover 51. The same triangular ring 511 is clamped and installed between the top ends of a plurality of fixed sleeves 510. The extrusion ring 512 is welded at the bottom end position of the inner wall of the protective cover 51. The liquid inlet pipes 515 are equidistantly embedded and installed at the top end of the protective cover 51. The liquid discharge pipes 516 are equidistantly embedded and installed at the bottom end of the protective cover 51. The opening directions of the liquid discharge pipes 516 and the liquid inlet pipes 515 are opposite to the rotation direction of the protective cover 51, preventing the raw material liquid inside the housing 1 from entering the protective cover 51 when the protective cover 51 rotates, resulting in the phenomenon that the internal structure of the protective cover 51 cannot operate normally, and at the same time facilitating the entry and exit of the raw material liquid inside the protective cover 51. A diversion groove 517 is formed in the inner wall of the protective cover 51 corresponding to the outer side of the top end of the liquid discharge pipe 516 for the convergence of the raw material liquid.

[0070] As Figure 4 and Figure 5 shown, the tension reset structure includes: a mounting block 53, a spring member 54, a mounting strip 55, a push rod 56, a limiting plate 57 and a rectangular block 518; the mounting block 53 is connected to the inner partition sleeve 52; the spring member 54 is connected to the mounting block 53; the rectangular block 518 is connected to the spring member 54; the mounting strip 55 is connected to the rectangular block 518; the push rod 56 is connected to the mounting strip 55 through the rectangular block 518; the limiting plate 57 is connected to the push rod 56 through the rectangular block 518; the spring member 54 drives the mounting strip 55 to displace through the rectangular block 518, and the mounting strip 55 drives the push rod 56 to deflect along the inside of the limiting plate 57 through the rectangular block 518.

[0071] During the evaporation process of the raw material liquid, the height inside it changes. When the height changes, the pressure changes accordingly, resulting in a decrease in the pressure on the push rod 56. At this time, the pulling force of the push rod 56 on the spring member 54 decreases, causing the spring member 54 to reset. When the spring member 54 resets, it drives the push rod 56 to deflect. When the push rod 56 deflects, it drives the mounting strip 55 to deflect, so that a triangle is formed between the push rod 56 and the mounting strip 55, thereby increasing the occupied area inside the protective cover 51, achieving the purpose of driving the liquid to move, and further enabling the overall liquid to rise.

[0072] During use, the height inside the raw material liquid changes during the evaporation process. When the height changes, the pressure changes accordingly. At this time, the pressure borne by the spring member 54 decreases, causing the spring member 54 to reset. When the spring member 54 resets, it drives the rectangular block 518 to rise. When the rectangular block 518 rises, it drives the mounting strip 55 to rise. Since the push rod 56 is movably connected to the inner partition sleeve 52 through the rectangular block 518 at this time, and the mounting strip 55 and the push rod 56 are movably connected through the rectangular block 518, the shape between the mounting strip 55, the push rod 56 and the outer wall of the inner partition sleeve 52 changes from a straight line to a triangle. At this time, the driving barrier 513 deforms and moves, and when the driving barrier 513 deforms and moves, it drives the pushing structure to operate.

[0073] Specifically, mounting blocks 53 are welded equidistantly on the top of the outer surface of the inner partition sleeve 52. A spring member 54 is fixedly installed at the bottom end of the mounting block 53. A rectangular block 518 is fixedly installed at the bottom end of the spring member 54. Two mounting strips 55 are symmetrically movably connected to the outside of the rectangular block 518 through pins. A push rod 56 is connected between the other ends of the two mounting strips 55 through the rectangular block 518. A fixed connection is provided between the push rod 56 and the rectangular block 518. The rectangular block 518 and the mounting strip 55 are connected through a pin. The top end of the push rod 56 is movably connected to a limiting plate 57 through the rectangular block 518. The limiting plate 57 is fixedly installed on the outside of the inner partition sleeve 52. A welded connection is provided between the top end of the push rod 56 and one end of the rectangular block 518. The rectangular block 518 and the limiting plate 57 are connected through a pin.

[0074] In this application, the spring member 54 belongs to an elastic linear driving member, specifically a spring telescopic rod.

[0075] Working principle: During actual operation, the raw material liquid is injected into the interior of the evaporation kettle shell 1 through the feed port. Meanwhile, the vacuum pump is started to evacuate the kettle. When the raw material liquid reaches the preset liquid level height, the feeding is stopped. Subsequently, the steam generator is started, and the generated steam is injected into the jacket layer of the shell 1 through the outlet pipe. Under the dual action of the vacuum environment and the steam jacket, the raw material liquid evaporates rapidly. The steam generated by evaporation enters the vapor-liquid separator 2, and the gas phase and liquid phase are separated through the internal separation structure. The separated gas is transported to the condenser, and under the cooling effect of the circulating cooling water, the steam is condensed into liquid water, which is discharged from the system by the condensate pump to maintain the water balance of the system and ensure the continuous and stable operation of the equipment. As the evaporation process continues, the concentration of the material in the evaporator continuously increases. When the discharging condition set by the process is reached, the concentrated material is discharged through the discharge pump to achieve the purpose of evaporation and concentration. The liquid phase separated by the vapor-liquid separator 2 returns to the interior of the shell 1 through the reflux pipe 7 and continues to participate in the evaporation process;

[0076] During the evaporation process, after the driving structure 3 is powered on, it starts to operate. The stirring rod 4 drives the stirring blade 8 to rotate, stirring the raw material liquid in the kettle to make the liquid evenly heated, effectively avoiding local overheating and improving the evaporation efficiency. At the same time, as the evaporation progresses, the liquid level of the raw material liquid gradually drops, and the pressure in the kettle changes. At this time, the pressure on the spring member 54 decreases, triggering its elastic reset mechanism. When the spring member 54 resets, it drives the rectangular block 518 to move upward, and then the mounting strip 55 rises synchronously. Since the push rod 56 is movably connected to the inner partition sleeve 52 through the rectangular block 518, the relative position between the mounting strip 55 and the push rod 56 changes, and the connection state between the two and the outer wall of the inner partition sleeve 52 changes from a straight line shape to a triangular shape. This structural change drives the barrier member 513 to deform and displace. As the occupancy rate of the internal space of the protective cover 51 increases, with the volume of the raw material liquid remaining unchanged, it prompts the liquid level in the kettle to rise relatively, ensuring that the raw material liquid can fully cover the heating area of the shell 1 and improving the heat exchange efficiency;

[0077] In addition, when the barrier member 513 rises, it will drive the lifting ring 58 to rise synchronously, causing the lifting column 59 to slide upward in the fixed sleeve 510. When the evaporation process slows down or stops, under the action of gravity, the lifting column 59 moves downward along the fixed sleeve 510, driving the lifting ring 58 and the barrier member 513 to move downward. During the process of the barrier member 513 moving along between the triangular ring 511 and the extrusion ring 512, the special structure of the triangular ring 511 can scrape and clean the outside of the barrier member 513, effectively preventing mineral crystals from adhering to the surface of the barrier member 513 and ensuring its normal working performance and service life.

[0078] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them.

Claims

1. An extraction and concentration process for marine minerals, characterized in that, It includes the following steps: Step 1: Stock solution collection: Use a collection water tank to collect the stock solution; Step 2: Stock solution treatment: The raw liquid is treated by a multi-media filter and a resin exchanger; Step 3: Evaporation and concentration: The treated stock solution enters the evaporation kettle for evaporation; Step 4: Centrifugal collection: The mixed solution that has completed evaporation and concentration in the evaporation kettle is transported through a pipeline to a high-speed centrifuge for treatment; Step 5: Freezing crystallization: Transfer the concentrated marine mineral precipitate retained in the centrifuge to a crystallization tank, and use a chiller to cool the crystallization tank; Step 6: Secondary centrifugation: The mixture that has settled statically in the crystallization tank is transported through a pipeline to another dedicated centrifuge for secondary centrifugation treatment; Step 7: Reflux: Transport the mother liquor collected after secondary centrifugation through a pipeline to the inside of the freezing crystallization for secondary crystallization; The evaporation kettle in Step 3 includes: a housing (1), which serves as the overall framework of the evaporation kettle; A vapor-liquid separator (2), connected to the top edge of the housing (1) for gas-liquid separation; A driving structure (3), connected to the middle of the top of the housing (1); A stirring rod (4), connected to the driving structure (3); Stirring blades (8), connected to the stirring rod (4), and the driving structure (3) drives the stirring blades (8) to rotate through the stirring rod (4); A compensation assembly: includes a protective cover (51), an inner partition sleeve (52), a barrier member (513), a tension reset structure, and a pushing structure; The protective cover (51) is connected to the stirring rod (4), the inner partition sleeve (52) is connected to the protective cover (51), the barrier member (513) is connected to the inner partition sleeve (52), the tension reset structure is connected between the inner partition sleeve (52) and the barrier member (513), the pushing structure is connected to the bottom end of the barrier member (513), and the tension reset structure drives the barrier member (513) to move between the inner wall of the protective cover (51) and the outside of the inner partition sleeve (52) and drives the pushing structure to compress.

2. The extraction and concentration process of a marine mineral according to claim 1, characterized in that, The driving structure (3) is fixedly installed on the top of the housing (1), the stirring rod (4) is connected to the output end of the driving structure (3), the stirring rod (4) penetrates the top of the housing (1), a feed port is provided on one side of the top of the housing (1), a connecting pipe is embedded and installed on the top of the outer surface of the housing (1), one end of the connecting pipe is connected to a vacuum pump, and pipes are symmetrically embedded and installed at the bottom of the outer surface of the housing (1), and one of the pipes is an air outlet pipe and the other pipe is an air inlet pipe.

3. The extraction and concentration process of a marine mineral according to claim 2, characterized in that, A steam pipe (6) is installed between the vapor-liquid separator (2) and the housing (1), the air outlet end of the steam pipe (6) is connected to the air inlet end of the vapor-liquid separator (2), the discharge end of the vapor-liquid separator (2) is connected to a reflux pipe (7), one end of the reflux pipe (7) is embedded and installed at the top of the outside of the housing (1), and the air outlet end of the vapor-liquid separator (2) is connected to a condenser through a pipeline.

4. The extraction and concentration process of a marine mineral according to claim 1, characterized in that, The tension reset structure includes: A mounting block (53), connected to the inner partition sleeve (52); Spring member (54), connected to the mounting block (53); Rectangular block (518), connected to the spring member (54); Mounting strip (55), connected to the rectangular block (518); Push rod (56), connected to the mounting strip (55) through the rectangular block (518); Limiting plate (57), connected to the push rod (56) through the rectangular block (518); The spring member (54) drives the mounting strip (55) to displace through the rectangular block (518), and the mounting strip (55) drives the push rod (56) to deflect along the inside of the limiting plate (57) through the rectangular block (518).

5. The extraction and concentration process of a marine mineral according to claim 1, characterized in that, The pushing structure includes: Lifting ring (58), connected to the bottom end of the barrier member (513); Lifting column (59), connected to the top end of the lifting ring (58); Fixed sleeve (510), sleeved on the outside of the lifting column (59) and connected to the protective cover (51).

6. The extraction and concentration process of a marine mineral according to claim 5, wherein, The pushing structure further includes: Triangular ring (511), connected to the fixed sleeve (510); Extrusion ring (512), connected to the protective cover (51), and the barrier member (513) moves between the extrusion ring (512) and the triangular ring (511).

7. The extraction and concentration process of a marine mineral according to claim 6, characterized in that, Liquid inlet pipes (515) are equidistantly embedded and installed at the top end of the protective cover (51), and liquid outlet pipes (516) are equidistantly embedded and installed at the bottom end of the protective cover (51). The opening directions of the liquid outlet pipes (516) and the liquid inlet pipes (515) are opposite to the rotation direction of the protective cover (51).

8. The extraction and concentration process of a marine mineral according to claim 5, characterized in that, A disc (519) is snap-fitted and installed at the top end of the lifting column (59). The outer diameter of the disc (519) is equal to the maximum outer diameter of the lifting column (59), and the shape of the lifting column (59) is T-shaped.

9. The extraction and concentration process of a marine mineral according to claim 1, characterized in that, A support frame is installed on the outside of the housing (1), and a ladder is installed at one end of the support frame.

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