Salt lake brine impurity removal device and method

Abstract

The invention discloses a salt lake brine impurity removal device and method, and relates to the technical field of inorganic salt chemical engineering, the salt lake brine impurity removal device comprises a tank body, a sealing cover is detachably connected to the top end of the tank body, a pressure applying assembly is installed on the sealing cover, a first filter membrane is installed in the middle of the tank body, the movable end of the pressure applying assembly faces the first filter membrane, and a motor is installed on the tank body below the first filter membrane; a first electric push rod is installed at the output end of the motor, the output end of the first electric push rod faces the pressure applying assembly, a plurality of sets of scraping plates are detachably installed at the output end of the first electric push rod through an installation assembly, when the scraping plates are located at the lowest positions, the scraping plates are in sliding connection with the first filter membrane, and fine filter assemblies are installed on the scraping plates. Residual substances in the solution can be further removed through secondary filtering treatment, and the purity of the final solution is improved, so that the energy consumption and the chemical use amount in subsequent treatment steps are reduced, and the overall treatment cost is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of inorganic salt chemical industry, and particularly relates to a salt lake brine impurity removal device and method. Background Art

[0002] Salt lake brine contains a large amount of useful substances, such as lithium, potassium, etc., which can be used in production after extraction and industrial processing. However, the brine also contains a large amount of impurity particles. Before industrial processing and extraction, the brine needs to be purified to improve its purity and applicability.

[0003] The existing salt lake brine impurity removal device filters the salt lake brine through a separation membrane. However, when it is used, it does not have a structure for secondary treatment and purification. Although conventional membrane separation can remove impurities to a certain extent, its effect may be limited for tiny particulate impurities. These impurities will remain in the solution and affect the final purity and stability of the salt lake brine. Summary of the invention

[0004] In view of the problems mentioned in the background technology, the purpose of the present invention is to provide a salt lake brine impurity removal device and method to solve the problems mentioned in the above background technology.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions:

[0006] A salt lake brine impurity removal device and method, including a tank body, a sealing cover detachably connected to the top of the tank body, a pressure assembly installed on the sealing cover, a first filter membrane installed in the middle of the tank body, the movable end of the pressure assembly faces the first filter membrane, a motor is installed on the tank body below the first filter membrane, an electric push rod 1 is installed on the output end of the motor, the output end of the electric push rod 1 faces the pressure assembly and a plurality of scrapers are detachably installed on the output end through the mounting assembly, when the scraper is at the lowest point, the scraper is slidably connected to the first filter membrane, and a fine filtering assembly is installed on the scraper.

[0007] As a preferred technical solution, a feed pipe is installed at the top of the tank body, a valve is installed on the feed pipe, and the movable end of the pressure-applying component can be located above the feed pipe.

[0008] As a preferred technical solution, a collecting hopper is installed below the first filter membrane, and a discharge pipe is installed at the output end of the collecting hopper.

[0009] As a preferred technical solution, the pressure-applying assembly includes a hydraulic cylinder installed on a sealing cover, a piston plate is installed on the output end of the hydraulic cylinder, the piston plate is slidably connected to the inner wall of the tank, and a solenoid valve is installed on the piston plate.

[0010] As a preferred technical solution, the distances between any two adjacent groups of scrapers are equal.

[0011] As a preferred technical solution, the installation assembly includes a connecting plate installed on an output end of the electric push rod, a connecting seat is detachably connected to the connecting plate, a connecting ring is installed at the bottom end of the connecting seat, and multiple groups of scrapers are installed on the circumference of the connecting ring.

[0012] As a preferred technical solution, the scraper forms an acute angle with the first filter membrane.

[0013] As a preferred technical solution, the fine filtration component includes a storage box installed under the scraper, a slide groove is provided on the scraper, the slide groove portion located above the storage box passes through the scraper, a cover plate for closing the storage box is slidably connected in the slide groove, a driving component for driving the cover plate to open and close is installed between the slide groove and the cover plate, and the side wall of the storage box away from the electric push rod is set as a second filter membrane.

[0014] A method for removing impurities from salt lake brine, the impurity removal steps are as follows:

[0015] S1: Preparation work, connect the feed pipe with the external connection pipe, then open the solenoid valve, raise the piston plate to the top of the feed pipe and close the solenoid valve, then add materials into the tank through the feed pipe, and finally close the valve;

[0016] S2: First impurity removal: The hydraulic cylinder drives the piston plate to descend, pressurizing the impurity-containing brine so that the brine is filtered through the first filter membrane. During this period, the electric push rod drives the scraper to rise so that the scraper is placed in the brine. The motor can drive the scraper to rotate and stir the salt lake brine. The impurities enter the collecting hopper and are discharged from the discharge pipe;

[0017] S3: Preparation for secondary impurity removal: The surface of the first filter membrane will leave the initially filtered solution, and the electric push rod will drive the scraper to descend and stick to the first filter membrane, and then the drive assembly will drive the cover to slide into the slide slot to open the storage box, and then the motor will drive the scraper to rotate, and the initially filtered solution on the surface of the first filter membrane will be scraped into the storage box, and then the cover will be closed;

[0018] S4: Secondary impurity removal: The electric push rod drives the scraper to rise and leave the surface of the first filter membrane, and then the motor drives the scraper to rotate at high speed, so that the solution after preliminary filtration in the storage box is filtered close to the second filter membrane under the action of centrifugal force. The impurities after secondary impurity removal pass through the first filter membrane and enter the collecting hopper and are discharged from the discharge pipe;

[0019] S5: Discharging, open the buckle outwards to disengage from the card slot, then open the solenoid valve, and pull out the sealing cover together with the piston plate, then remove the connecting seat from the connecting plate, and then take out the connecting seat together with the scraper from the tank body, so as to take out the pure salt lake brine solution inside.

[0020] Beneficial Effects

[0021] During membrane treatment, the scraper is driven by a motor to rotate, which can promote the mixing and diffusion of brine on the membrane surface, help increase the mass transfer rate between lithium ions and the membrane, and reduce the accumulation of pollutants and particulate matter on the membrane surface because they are difficult to stably adhere to in a dynamic fluid.

[0022] When the scraper rotates centrifugally at high speed, the scraper can blow air to the first filter membrane, which can effectively reduce the solid particles accumulated on the surface of the first filter membrane and impurities in the solution, and prevent them from clogging and forming dirt on the surface of the first filter membrane.

[0023] Secondary filtration treatment can further remove residual substances in the solution and improve the purity of the final solution, thereby reducing energy consumption and chemical usage in subsequent processing steps and reducing overall processing costs.

[0024] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A three-dimensional structural diagram of a salt lake brine impurity removal device and method proposed by the present invention;

[0026] Figure 2 A cross-sectional view of a salt lake brine impurity removal device and method proposed by the present invention Figure 1 ;

[0027] Figure 3 A cross-sectional view of a salt lake brine impurity removal device and method proposed by the present invention Figure 2 ;

[0028] Figure 4 A three-dimensional structural diagram of the core processing components;

[0029] Figure 5 for Figure 2 A magnified image of point A;

[0030] Figure 6 for Figure 3 Enlarged view of point B.

[0031] Figure numerals: 1. tank body; 2. sealing cover; 3. rotating shaft; 4. feed pipe; 5. valve; 6. buckle; 7. slot; 8. window; 9. hydraulic cylinder; 10. piston plate; 11. solenoid valve; 12. first filter membrane; 13. bracket; 14. motor; 15. electric push rod one; 16. connecting plate; 17. connecting seat; 18. connecting ring; 19. scraper; 20. cover plate; 21. storage box; 22. slide; 23. electric push rod two; 24. second filter membrane; 25. discharge pipe; 26. connecting flange; 27. collecting hopper. DETAILED DESCRIPTION

[0032] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar symbols throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0033] Example 1

[0034] refer to Figures 1 to 6 The salt lake brine impurity removal device and method described in this embodiment include a tank body 1, a sealing cover 2 is clamped on the top of the tank body 1, a plurality of groups of card slots 7 are arranged on the top of the tank body 1 along the circumferential direction, a plurality of groups of buckles 6 are correspondingly installed on the sealing cover 2, the buckles 6 and the card slots 7 are clamped one by one so that the sealing cover 2 is fixed to the tank body 1, a feed pipe 4 is installed on the top of the tank body 1, a valve 5 is installed on the feed pipe 4, a discharge pipe 25 is installed on the output end below the tank body 1, and a connecting flange 26 is installed on the other end of the discharge pipe 25, a pressure component is installed on the sealing cover 2, and the pressure component includes a hydraulic cylinder 9 installed on the sealing cover 2, the output end of the hydraulic cylinder 9 extends into the tank body 1 and is installed on the output end The piston plate 10 is slidably connected to the inner wall of the tank body 1, and a solenoid valve 11 is installed on the piston plate 10. A first filter membrane 12 is installed in the middle of the tank body 1. A motor 14 is installed on the tank body 1 below the first filter membrane 12 through a bracket 13. The output end of the motor 14 passes through the first filter membrane 12 and is installed with an electric push rod 15. The output end of the electric push rod 15 faces the pressure component and a connecting seat 17 is installed on the output end. A plurality of scrapers 19 are installed at the bottom end of the connecting seat 17 through a connecting ring 18. When the scraper 19 is at the lowest point, the scraper 19 is slidably connected to the first filter membrane 12, and the scraper 19 forms an acute angle with the first filter membrane 12. A fine filtration component is installed on the scraper 19.

[0035] The solenoid valve 11 is opened, and the hydraulic cylinder 9 drives the piston plate 10 to rise above the feed pipe 4, and then the solenoid valve 11 is closed, and the brine enters the tank body 1 from the feed pipe 4. After the injection, the valve 5 is closed. The solenoid valve 11 and the valve 5 make the brine above closed, so that it is convenient for the piston plate 10 to descend and pressurize the impurity-containing brine, so that the impurities are filtered through the first filter membrane 12, and the filtered impurities are output from the tank body 1 through the discharge pipe 25. The connecting flange 26 facilitates the connection between the discharge pipe 25 and the storage device. At the same time, the electric push rod 15 drives the scraper 19 to rise through the connecting seat 17 and the connecting ring 18. It is worth noting that the connecting seat 17 is always located below the pressure component. The motor 14 rotates, thereby driving the scraper 19 to rotate and stir the brine, thereby increasing the flow speed and pressure of the brine and increasing the mass transfer efficiency; the scraper 19 is tilted to facilitate the brine after the initial filtration to enter the fine filtration component for secondary impurity removal; the sealing cover 2 is conveniently removed from the tank body 1 through the buckle 6 and the slot 7, and the scraper 19 containing the finished product can be removed.

[0036] Preferably, a rotating shaft 3 is installed at the bottom end of the sealing cover 2 , the rotating shaft 3 is rotatably connected to the top end of the tank body 1 , and a plurality of groups of buckles 6 are installed on the rotating shaft 3 .

[0037] When the sealing cover 2 is installed on the tank body 1, the relative position of the sealing cover 2 and the tank body 1 can be adjusted through the rotating shaft 3, so that the buckle 6 can be adjusted to the slot 7 conveniently, saving effort.

[0038] Preferably, a connecting plate 16 is installed on the output end of the electric push rod 15, and the connecting plate 16 and the connecting seat 17 are detachably connected.

[0039] When the impurities are removed, the connection seat 17 can be taken out from the connection plate 16 . The connection plate 16 is used to reinforce the connection seat 17 and facilitate the installation and removal of the connection plate 16 .

[0040] Preferably, multiple groups of scrapers 19 are installed on the outer wall of the connecting ring 18 at equal intervals.

[0041] The scrapers 19 are installed at equal intervals so that each group of scrapers 19 is evenly stressed and each group of fine filter components collects an equal amount of brine.

[0042] The fine filtration assembly includes a storage box 21 installed below the scraper 19, a slide groove 22 is provided on the scraper 19, the slide groove 22 is connected to the storage box 21, the slide groove 22 above the storage box 22 partially passes through the scraper 19, a cover plate 20 for closing the storage box 21 is slidably connected in the slide groove 22, an electric push rod 23 is installed in the slide groove 22, the cover plate 20 is installed on the output end of the electric push rod 23, and the side wall of the storage box 21 away from the electric push rod 15 is set as a second filter membrane 24.

[0043] After the initial impurity removal is completed, the electric push rod 15 drives the scraper 19 to descend until the bottom end of the scraper 19 contacts the first filter membrane 12. At this time, the electric push rod 23 drives the cover plate 20 to slide into the slide groove 22, and the motor 14 drives the scraper 19 to rotate, and the rotation direction of the scraper 19 is consistent with the rising direction of the scraper 19. The scraper 19 shovels the brine on the first filter membrane 12 into the storage box 21, and then the cover plate 20 is closed, the electric push rod 15 drives the scraper 19 to rise and separate from the first filter membrane 12, and then the motor 14 drives the scraper 19 to rotate rapidly, and the impurities pass through the second filter membrane 24 under the action of centrifugal force and are filtered out, leaving the pure brine solution in the storage box 21; and when the scraper 19 rotates centrifugally at high speed, it can not only perform centrifugal filtration, but also blow air to the first filter membrane 12, effectively reducing the solid particles accumulated on the surface of the first filter membrane 12 and the impurities in the solution, and preventing them from clogging and forming dirt on the surface of the first filter membrane 12.

[0044] Preferably, a collecting hopper 27 is installed below the first filter membrane 12 , and an output end of the collecting hopper 27 is fixedly connected to the discharge pipe 25 .

[0045] Impurities pass through the first filter membrane 12 and fall into the collecting hopper 27, and are then discharged from the discharge pipe 25. The bucket-shaped collecting hopper 27 allows the impurities to enter the discharge pipe 25 quickly and completely, thereby increasing the impurity removal efficiency.

[0046] The steps for removing impurities are as follows:

[0047] S1: Preparation work, connect the feed pipe 4 with the external connection pipe, then open the solenoid valve 11, raise the piston plate 10 to the top of the feed pipe 4 and then close the solenoid valve 11, then add materials into the tank body 1 through the feed pipe 4, and finally close the valve 5;

[0048] S2: First impurity removal: The hydraulic cylinder 9 drives the piston plate 16 to descend, pressurizing the impurity-containing brine, so that the brine is filtered through the first filter membrane 12. During this period, the electric push rod 15 drives the scraper 19 to rise so that the scraper 19 is placed in the brine. The motor 14 can drive the scraper 19 to rotate and stir the salt lake brine, thereby increasing the flow speed and pressure of the brine and enhancing the mass transfer efficiency. The impurities enter the collecting hopper 27 and are discharged from the discharge pipe 25;

[0049] S3: Preparation for secondary impurity removal: The surface of the first filter membrane 12 will leave the initially filtered solution. At this time, the electric push rod 15 drives the scraper 19 to descend and stick to the first filter membrane 12, and then the electric push rod 23 drives the cover plate 20 to slide into the slide groove 22 to open the storage box 21, and then the motor 14 drives the scraper 19 to rotate, and the initially filtered solution on the surface of the first filter membrane 12 is scraped into the storage box 21, and then the cover plate 20 is closed;

[0050] S4: Secondary impurity removal: The electric push rod 15 drives the scraper 19 to rise and leave the surface of the first filter membrane 12, and then the motor 14 drives the scraper 19 to rotate at a high speed, so that the solution after preliminary filtration in the storage box 21 is filtered close to the second filter membrane 24 under the action of centrifugal force. The centrifugal filtration time is 10-20 minutes. The impurities after secondary impurity removal pass through the first filter membrane 12 and enter the collecting hopper 27 and are discharged from the discharge pipe 25;

[0051] S5: Discharging, open the buckle 6 outwards, disengage from the card slot 7, and then open the solenoid valve 11, so that the sealing cover 2 together with the piston plate 10 can be pulled outwards, and then the connecting seat 17 can be removed from the connecting plate 16, and the connecting seat 17 together with the scraper 19 can be taken out of the tank body 1, so as to take out the pure salt lake brine solution inside.

[0052] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0053] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0054] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0056] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A salt lake brine impurity removal device, comprising a tank body (1), a sealing cover (2) being detachably connected to the top of the tank body (1), characterized in that: A pressure component is installed on the sealing cover (2), a first filter membrane (12) is installed in the middle of the tank body (1), the movable end of the pressure component faces the first filter membrane (12), a motor (14) is installed on the tank body (1) below the first filter membrane (12), an electric push rod (15) is installed on the output end of the motor (14), and a plurality of groups of scrapers (19) are detachably installed on the output end of the electric push rod (15) through the installation component, and a fine filtering component is installed on the scraper (19), and the scraper (19) contacts the first filter membrane (12) when it is lowered to the lowest position.

2. The salt lake brine impurity removal device according to claim 1, characterized in that: A feed pipe (4) is installed at the top of the tank body (1), a valve (5) is installed on the feed pipe (4), and the movable end of the pressure-applying component can be located above the feed pipe (4).

3. The salt lake brine impurity removal device according to claim 1, characterized in that: A collecting hopper (27) is installed below the first filter membrane (12), and a discharge pipe (25) is installed at the output end of the collecting hopper (27).

4. The salt lake brine impurity removal device according to claim 1, characterized in that: The pressure-applying assembly comprises a hydraulic cylinder (9) mounted on a sealing cover (2), a piston plate (10) mounted on the output end of the hydraulic cylinder (9), the piston plate (10) being slidably connected to the inner wall of the tank body (1), and a solenoid valve (11) mounted on the piston plate (10).

5. The salt lake brine impurity removal device according to claim 1, characterized in that: The distances between any two adjacent groups of scrapers (19) are equal.

6. The salt lake brine impurity removal device according to claim 1, characterized in that: The mounting assembly comprises a connecting plate (16) mounted on the output end of an electric push rod (15), a connecting seat (17) being detachably connected to the connecting plate (16), a connecting ring (18) being mounted on the bottom end of the connecting seat (17), and a plurality of scraper plates (19) being mounted on the circumference of the connecting ring (18).

7. The salt lake brine impurity removal device according to claim 1, characterized in that: The scraper (19) forms an acute angle with the first filter membrane (12).

8. The salt lake brine impurity removal device according to claim 1, characterized in that: The fine filtering assembly comprises a storage box (21) installed below the scraper (19), a slide groove (22) is provided on the scraper (19), a portion of the slide groove (22) located above the storage box (22) passes through the scraper (19), a cover plate (20) for closing the storage box (21) is slidably connected in the slide groove (22), a driving assembly for driving the cover plate (20) to open and close is installed between the slide groove (22) and the cover plate (20), and a second filter membrane (24) is arranged on a side wall of one end of the storage box (21) away from the electric push rod (15).

9. A method for removing impurities from salt lake brine, characterized in that: The steps for removing impurities are as follows: S1: Preparation work, connecting the feed pipe (4) to the external connection pipe, then opening the solenoid valve (11), raising the piston plate (10) to the top of the feed pipe (4) and then closing the solenoid valve (11), then adding materials into the tank body (1) through the feed pipe (4), and finally closing the valve (5); S2: First impurity removal: The hydraulic cylinder (9) drives the piston plate (16) to descend, exerting pressure on the impurity-containing brine, so that the brine is filtered through the first filter membrane (12). During this period, the electric push rod (15) drives the scraper (19) to rise so that the scraper (19) is placed in the brine. The motor (14) can drive the scraper (19) to rotate and stir the salt lake brine, and the impurities enter the collecting hopper (27) and are discharged from the discharge pipe (25); S3: Preparation for secondary impurity removal: The surface of the first filter membrane (12) will retain the initially filtered solution, and the electric push rod (15) drives the scraper (19) to descend and stick to the first filter membrane (12), and then the drive assembly drives the cover (20) to slide into the slide groove (22) to open the storage box (21), and then the motor (14) drives the scraper (19) to rotate, and the initially filtered solution on the surface of the first filter membrane (12) is scraped into the storage box (21), and then the cover (20) is closed; S4: Secondary impurity removal: The electric push rod (15) drives the scraper (19) to rise and detach from the surface of the first filter membrane (12), and then the motor (14) drives the scraper (19) to rotate at a high speed, so that the solution after the preliminary filtration in the storage box (21) is filtered close to the second filter membrane (24) under the action of centrifugal force, and the impurities after the secondary impurity removal pass through the first filter membrane (12) and enter the collecting hopper (27) and are discharged from the discharge pipe (25); S5: Discharging: Open the buckle (6) outward to disengage the card slot (7), then open the solenoid valve (11), and then pull the sealing cover (2) outward together with the piston plate (10), and then remove the connecting seat (17) from the connecting plate (16), and then take the connecting seat (17) out of the tank body (1) together with the scraper (19), so as to take out the pure salt lake brine solution inside.

Images