Device for extracting lithium from lithium electrode and lithium electrode reaction equipment

Abstract

The present disclosure relates to the field of lithium extraction from lithium electrodes. The device for lithium extraction from lithium electrodes and the lithium extraction reaction equipment of the present disclosure are used to be immersed in a mixture formed by mixing water and lithium electrode powder, and include multiple bead string components arranged in parallel or in a mesh. Each of the bead string components includes a plurality of piezoelectric beads that are sleeved on a bead string and arranged at intervals, and the piezoelectric beads form charge movement that promotes the precipitation of lithium ions under the friction between water and lithium electrode powder and ultrasonic cavitation. The device for lithium extraction from lithium electrodes and the lithium extraction reaction equipment of the present disclosure have high lithium extraction efficiency and are unlikely to cause environmental pollution.

Description

Technical Field

[0001] The present disclosure relates to the technical field of lithium extraction from lithium batteries, and in particular to a device for extracting lithium from lithium electrodes and a lithium extraction reaction device for lithium electrodes. Background Art

[0002] In recent years, with the growing global demand for renewable energy and electric vehicles, the application areas of lithium batteries have expanded rapidly, especially lithium iron phosphate electrodes, which have become the main power source choice for electric vehicles, power storage and consumer electronic devices due to their advantages such as high safety, long cycle life and low cost.

[0003] However, along with the large-scale use comes a sharp increase in the number of retired lithium electrodes, in which the lithium positive electrode materials are rich in lithium resources. However, traditional lithium recovery methods often use expensive chemical reagents such as acids and alkalis, and extract lithium after chemical reactions through complex process flows. However, the above methods are prone to environmental pollution and have low lithium extraction efficiency. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a device for extracting lithium from a lithium electrode and a lithium electrode lithium extraction reaction equipment, which has high lithium extraction efficiency and is less likely to cause environmental pollution.

[0005] The device for extracting lithium from lithium electrodes disclosed in the present invention is used to be immersed in a mixture formed by mixing water and lithium electrode powder, and includes: at least one bead mesh layer, including a plurality of bead string components arranged in parallel or in a mesh, each of the bead string components includes a plurality of piezoelectric beads sleeved on a bead string member and arranged at intervals, and the piezoelectric beads form charge movement that promotes the precipitation of lithium ions under the friction between water and lithium electrode powder and the ultrasonic cavitation action.

[0006] According to some embodiments of the present disclosure, the piezoelectric beads are movably disposed on a beaded member, and the beaded member forms an independent active area for each piezoelectric bead.

[0007] According to some embodiments of the present disclosure, the piezoelectric bead is movably disposed along the bead member and / or rotatably disposed around the bead member.

[0008] According to some embodiments of the present disclosure, there are multiple bead mesh layers, and the multiple bead mesh layers include: a first bead mesh layer, including multiple first bead string components, each of the first bead string components includes multiple first piezoelectric beads mounted on the first bead piece and spaced apart along the first direction; a second bead mesh layer, arranged in the up-down direction with the first bead mesh layer, and including multiple second bead string components, each of the second bead string components includes multiple second piezoelectric beads mounted on the second bead piece and spaced apart along the second direction, the second direction is different from the first direction, and the first piezoelectric beads and the second piezoelectric beads respectively provided on the adjacent first bead mesh layers and the second bead mesh layers are staggered in the horizontal plane.

[0009] According to some embodiments of the present disclosure, there are multiple first bead mesh layers and multiple second bead mesh layers, and the multiple first bead mesh layers and the multiple second bead mesh layers are staggered in the up and down directions, and the two first piezoelectric beads respectively included in two adjacent first bead mesh layers are staggered, and the two second piezoelectric beads respectively included in two adjacent second bead mesh layers are staggered.

[0010] According to some embodiments of the present disclosure, there are multiple bead mesh layers, the multiple bead mesh layers are arranged in the up and down direction, and the piezoelectric beads are spherically arranged.

[0011] The present disclosure also provides a lithium electrode lithium extraction reaction device, comprising: the device for extracting lithium from lithium electrodes as described above; a reaction shell, provided with a reaction chamber for accommodating the device for extracting lithium from lithium electrodes and a feed port and a water inlet connected to the reaction chamber, the feed port being used for introducing lithium electrode powder; and an ultrasonic vibrator, used for outputting ultrasonic waves to drive the device to vibrate, so that the piezoelectric beads are ultrasonically vibrated.

[0012] According to some embodiments of the present disclosure, the reaction shell is provided with a filter chamber connected to the reaction chamber and a lithium liquid outlet connected to the filter chamber; the lithium electrode lithium extraction reaction equipment also includes: a separator, which can be movably arranged between the reaction chamber and the filter chamber to separate the reaction chamber and the filter chamber; and when the separator moves to the conducting position, the reaction chamber and the filter chamber are connected; a filter screen is arranged in the filter chamber, and is used to filter the solid slag formed after lithium extraction.

[0013] According to some embodiments of the present disclosure, the filter screen includes a screen frame and at least one screen member, the screen frame is positioned in the filter cavity and forms at least one interlocking groove; the screen member is detachably arranged in the interlocking groove; and / or the filter screen is arranged at an angle, and the reaction shell is provided with a slag outlet corresponding to the lower end of the filter screen; the lithium electrode lithium extraction reaction equipment also includes: a discharge gate, which is movably arranged at the slag outlet to open / close the slag outlet.

[0014] According to some embodiments of the present disclosure, it further includes: a water level detector, which is arranged above the device for extracting lithium from the lithium electrode to detect whether water submerges the device for extracting lithium from the lithium electrode.

[0015] Beneficial effects:

[0016] (1) The device for extracting lithium from a lithium electrode and the lithium extraction reaction equipment of the lithium electrode disclosed in the present invention have high lithium extraction efficiency and are unlikely to cause environmental pollution.

[0017] (2) In the device for extracting lithium from lithium electrodes and the lithium extraction reaction equipment disclosed in the present invention, the first piezoelectric bead or the second piezoelectric bead can be rotatably and movably arranged, which is beneficial to increase the contact area between the lithium electrode powder and water and the piezoelectric material, and further improve the lithium extraction effect.

[0018] (3) The device for extracting lithium from lithium electrodes and the lithium extraction reaction equipment disclosed in the present invention have the first piezoelectric beads of two adjacent layers staggered and the second piezoelectric beads of two adjacent layers staggered, which is beneficial to increase the contact area between lithium electrode powder and water and piezoelectric material and prolong the contact time, further improving the lithium extraction effect.

[0019] (4) The device for extracting lithium from lithium electrodes and the lithium extraction reaction equipment disclosed in the present invention are convenient for discharging slag and have less impurities in the collected lithium liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the device for extracting lithium from a lithium electrode according to an embodiment of the present disclosure during lithium extraction.

[0021] Figure 2 It is a schematic diagram of the structure of a device for extracting lithium from a lithium electrode according to an embodiment of the present disclosure.

[0022] Figure 3 It is a partial schematic diagram of the first piezoelectric bead installed on the first bead member according to an embodiment of the present disclosure.

[0023] Figure 4 It is a partial schematic diagram of the second piezoelectric bead installed on the second bead member according to an embodiment of the present disclosure.

[0024] Figure 5 It is a front view of the device for extracting lithium from a lithium electrode according to an embodiment of the present disclosure.

[0025] Figure 6 It is a schematic structural diagram of the lithium extraction reaction equipment of the lithium electrode according to the embodiment of the present disclosure.

[0026] Figure 7 It is a schematic structural diagram of the lithium extraction reaction device of the lithium electrode of the embodiment of the present disclosure when it is cut open.

[0027] Figure 8It is a schematic diagram of the arrangement of some electronic components of an embodiment of the present disclosure.

[0028] Fig. 9 yes Figure 7 Enlarged schematic diagram of part A.

[0029] Reference numerals:

[0030] Device 10 for extracting lithium from a lithium electrode;

[0031] The first bead mesh layer 11a; the first bead member 111a; the first piezoelectric bead body 112a; the first recessed portion 1101a;

[0032] The second bead mesh layer 11b; the second beaded member 111b; the second piezoelectric bead 112b; the second recessed portion 1101b;

[0033] Mixture 800;

[0034] Lithium electrode lithium extraction reaction equipment 900;

[0035] Reaction shell 91; reaction chamber 9101; feed port 9102; water inlet 9103; filter chamber 9104; lithium liquid outlet 9105; slag outlet 9106; conduction port 9107; material blocking portion 911; discharge port 91101; guide portion 912; guide surface 9121;

[0036] Ultrasonic vibrator 92; ultrasonic generator 921; ultrasonic transducer 922;

[0037] Separator 93;

[0038] Filter screen 94; screen frame 941; engaging groove 9401; screen element 942;

[0039] Discharge gate 95;

[0040] Water level detector 96;

[0041] Control unit 97;

[0042] Feed valve 98. DETAILED DESCRIPTION

[0043] The following is an explanation of the embodiments of the present disclosure by specific examples, and those skilled in the art can easily understand other advantages and effects of the present disclosure from the information disclosed by the present disclosure. The present disclosure can also be implemented or applied through other different specific embodiments, and the details in the present disclosure can also be modified or changed in various ways according to different viewpoints and application modules without departing from the spirit of the present disclosure. It should be noted that the embodiments in the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0044] The following is a detailed description of the embodiments of the present disclosure with reference to the accompanying drawings so that those skilled in the art can easily implement the present disclosure. The present disclosure can be embodied in many different forms and is not limited to the embodiments described herein.

[0045] In the representations of the present disclosure, the reference terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" and the like mean that the specific features, structures, materials or characteristics represented in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. Moreover, the specific features, structures, materials or characteristics represented may be combined in any one or a group of embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples represented in the present disclosure and the features of different embodiments or examples, unless they are mutually contradictory.

[0046] 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 technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the representation of the present disclosure, "a group" means two or more, unless otherwise clearly and specifically defined.

[0047] In order to clearly describe the present disclosure, components not related to the description are omitted, and the same reference numerals are given to the same or similar components throughout the specification.

[0048] Throughout the specification, when a device is said to be "connected" to another device, this includes not only the case of "direct connection" but also the case of "indirect connection" by placing other elements therebetween. In addition, when a device is said to "include" a certain component, unless otherwise stated, it does not exclude other components, but means that other components may be included.

[0049] Although the terms first, second, etc. are used to represent various elements in this article in some examples, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, the first interface and the second interface, etc. are represented. Moreover, as used in this article, the singular forms "one", "one" and "the" are intended to also include plural forms, unless there is an opposite indication in the context. It should be further understood that the terms "comprising" and "including" indicate that there are the described features, steps, operations, elements, modules, projects, kinds, and / or groups, but do not exclude the existence, occurrence or addition of one or a group of other features, steps, operations, elements, modules, projects, kinds, and / or groups. The terms "or" and "and / or" used herein are interpreted as inclusive, or mean any one or any combination. Therefore, "A, B or C" or "A, B and / or C" means "any of the following: A; B; C; A and B; A and C; B and C; A, B and C". Only when the combination of elements, functions, steps or operations is inherently mutually exclusive in some way, will there be an exception to this definition.

[0050] The technical terms used herein are only used to refer to specific embodiments and are not intended to limit the present disclosure. The singular form used herein also includes the plural form unless the sentence clearly indicates the contrary meaning. The meaning of "including" used in the specification is to specify specific characteristics, regions, integers, steps, operations, elements and / or components, and does not exclude the existence or addition of other characteristics, regions, integers, steps, operations, elements and / or components.

[0051] Although not defined differently, all terms, including technical and scientific terms used herein, have the same meaning as those generally understood by those skilled in the art to which the present disclosure belongs. Terms defined in commonly used dictionaries are additionally interpreted as having meanings consistent with relevant technical literature and the message of the present disclosure, and shall not be overly interpreted as ideal or very formal meanings unless defined.

[0052] In the related art, when the lithium element of lithium electrode powder is recovered, the lithium recovery method often uses expensive chemical reagents such as acid and alkali, and extracts the lithium after chemical reaction through a complex process. However, the above method is prone to environmental pollution and has low lithium extraction efficiency.

[0053] In view of this, the present disclosure provides a device for extracting lithium from a lithium electrode. When the device for extracting lithium from a lithium electrode powder is used to extract lithium, it is difficult to cause environmental pollution and is conducive to improving the efficiency of lithium extraction.

[0054] The device for extracting lithium from a lithium electrode provided in the present disclosure is used to be immersed in a mixture formed by mixing water and lithium electrode powder. The lithium electrode powder is a powder formed by crushing the lithium positive electrode material of the lithium electrode, and specifically, the lithium electrode powder includes one or more of lithium iron phosphate powder, lithium nickel cobalt aluminum powder, lithium cobalt oxide powder, lithium iron manganese phosphate powder, and lithium manganese oxide powder.

[0055] The device for extracting lithium from a lithium electrode disclosed in the present invention comprises at least one bead mesh layer. The bead mesh layer comprises a plurality of bead string assemblies arranged in parallel or in a mesh. For example, a plurality of the bead string assemblies are arranged in parallel, or a plurality of the bead string assemblies are arranged in a mesh. Each of the bead string assemblies comprises a plurality of piezoelectric beads sleeved on a bead string and arranged at intervals, and the piezoelectric beads form charge movement that promotes the precipitation of lithium ions under the friction between water and lithium electrode powder and the cavitation of ultrasonic waves.

[0056] The piezoelectric beads may have a piezoelectric coating made of piezoelectric material formed on the outer surface. When the piezoelectric material is subjected to pressure, a voltage and active charge will be formed between the two end faces. The piezoelectric material includes one or more of bismuth ferrite, polytetrafluoroethylene (PTFE), quartz, barium titanate, lead zirconate titanate (PZT), polyvinylidene fluoride (PVDF), lithium niobate, lead zirconate, perovskite-type materials, sodium polyacrylate, and polylactic acid (PLA). The piezoelectric coating can be formed by magnetron sputtering, precipitation, brushing, thermoplasticity, and adhesive bonding. In order to avoid the coating from falling off due to long-term use, the piezoelectric beads can also be die-cast by one or more of the above-mentioned piezoelectric materials.

[0057] Therefore, when the device for extracting lithium from lithium electrodes vibrates under the action of ultrasound, the piezoelectric beads will vibrate and rub against water and lithium electrode powder due to the vibration, thereby causing the charge on the piezoelectric beads to move. The charge movement on the piezoelectric beads forms a piezoelectric potential and promotes the dissolution of lithium ions in water. At the same time, it is worth mentioning that when ultrasound propagates in a mixture of water and lithium electrode powder, ultrasound will produce cavitation, causing tiny bubbles (such as oxygen) in the water to vibrate and grow under the action of ultrasound, and collapse rapidly when a certain energy threshold is reached, forming a cavitation cannon. The cavitation cannon explodes instantly, destroying the stable structure of the mixture 800 and making the water and lithium electrode powder have higher reactivity. At the same time, the cavitation cannon explosion will form an impact force on the piezoelectric beads. Compared with other vibration modes, the piezoelectric beads under ultrasonic vibration can form a larger piezoelectric potential and more charge movement, thereby further promoting the precipitation of lithium ions.

[0058] In summary, under an ultrasonic vibration environment, the device 10 for extracting lithium from lithium electrodes disclosed in the present invention can greatly promote the dissolution of lithium ions in water, so that the lithium ions can be dissolved in water with high efficiency and more lithium ions can be dissolved in water, which is beneficial to improving the lithium recovery efficiency, and has low cost, is difficult to cause pollution, and is environmentally friendly.

[0059] Optionally, the piezoelectric beads are movably arranged on the beaded member, and the beaded member forms an independent active area for each piezoelectric bead.

[0060] Therefore, when the bead mesh layer vibrates, the piezoelectric beads will move relative to the beaded member due to the vibration, and since the beaded member forms an independent active area for each piezoelectric bead, under a vibrating environment, a plurality of the piezoelectric beads can be relatively evenly distributed in the water and the lithium electrode powder, and a plurality of the piezoelectric beads are difficult to pile up together due to vibration. Therefore, each part of the outer surface of the piezoelectric bead body can fully contact and be fully squeezed and rubbed with the water and the lithium electrode powder, thereby increasing the contact area between the water and the lithium electrode powder and the piezoelectric material, so as to fully form piezoelectric potential and charge movement in each part of the outer surface of the piezoelectric bead body, and the kinetic energy generated when the piezoelectric beads are active can be transferred to the mixture, thereby breaking the stable structure of the water molecules and the lithium electrode powder, increasing the reaction activity of the water molecules and the lithium electrode powder, and promoting the combination of water molecules and the charges moving on the surface of the piezoelectric beads to form more oxidizing components, thereby further promoting the dissolution of lithium elements in water. Of course, it is understandable that each of the piezoelectric beads is fixedly mounted on the outside of the beaded component. At this time, since the position of each of the piezoelectric beads is fixed, the plurality of piezoelectric beads can also be dispersed and arranged more evenly.

[0061] Optionally, the beaded member is provided with a plurality of recessed portions arranged at intervals along the extension direction (length direction), each of the recessed portions is provided for the piezoelectric bead to be movably arranged, and the plurality of piezoelectric beads are confined one by one to the area where the plurality of recessed portions are located, so as to provide an independent activity area for each of the piezoelectric beads. Thus, under a vibration environment, each of the piezoelectric beads can move in correspondence with each of the recessed portions and it is difficult to cross the recessed portions, so that each of the piezoelectric beads has an independent activity area, and further, it is difficult for the plurality of piezoelectric beads to be piled up together due to vibration, and the plurality of piezoelectric beads can be arranged more evenly.

[0062] Optionally, the piezoelectric beads are arranged movably along the beaded member and / or rotatably around the beaded member. Preferably, the piezoelectric beads are rotatable around the beaded member and movably arranged along the beaded member. Thus, when the bead mesh layer vibrates, the piezoelectric beads will continuously shake on the beaded member due to the vibration, and the kinetic energy generated by the continuous shaking of the piezoelectric beads can be transferred to the mixture, thereby further promoting the dissolution of lithium elements in water.

[0063] Optionally, there are multiple bead mesh layers, which are arranged in the up-down direction, and the piezoelectric beads are arranged in a spherical shape. The spherical surface of the piezoelectric beads is difficult to block the lithium electrode powder, so that the lithium electrode powder can smoothly flow from the highest bead mesh layer to the lowest bead mesh layer and flow down naturally, so that each bead mesh layer can fully contact the lithium electrode powder.

[0064] Figure 1 It is a schematic diagram of the device for extracting lithium from a lithium electrode according to an embodiment of the present disclosure during lithium extraction. Figure 2 Schematic diagram of the structure of the device for extracting lithium from a lithium electrode according to an embodiment of the present disclosure. Figure 1 and Figure 2 There are multiple bead mesh layers, and the multiple bead mesh layers are used to be immersed in the mixture 800 formed by mixing water and lithium electrode powder. The multiple bead mesh layers include a first bead mesh layer 11a and a second bead mesh layer 11b.

[0065] The first bead mesh layer 11a includes a plurality of first bead string components. Each of the first bead string components includes a plurality of first piezoelectric beads 112a sleeved on the first bead string component 111a and spaced apart along a first direction. For example, the first direction may be Figure 2 Left-right direction as shown in .

[0066] The second bead mesh layer 11b and the first bead mesh layer 11a are arranged in the vertical direction and include a plurality of second bead string components. Each of the second bead string components includes a plurality of second piezoelectric beads 112b sleeved on the second bead string component 111b and spaced along a second direction, and the second direction is different from the first direction. For example, the second direction can be Figure 2 The front-to-back direction shown in . And the first piezoelectric beads 112a and the second piezoelectric beads 112b respectively provided on the adjacent first bead mesh layer 11a and the second bead mesh layer 11b are staggered in the horizontal plane. Therefore, since the first piezoelectric beads 112a and the second piezoelectric beads 112b of the two adjacent layers are staggered in the horizontal plane, the arrangement of the first piezoelectric beads 112a and the second piezoelectric beads 112b in the three-dimensional space is also relatively uniform, which is beneficial to further promote the full contact between the lithium electrode material and water and the piezoelectric material, and further promote the dissolution of lithium elements in water.

[0067] Optionally, the first piezoelectric bead 112a is movably disposed along the first bead member 111a and / or rotatably disposed around the bead member 111a. The second piezoelectric bead 112b is movably disposed along the second bead member 111b and / or rotatably disposed around the bead member 111b. Thus, when the first bead mesh layer 11a and the second bead mesh layer 11b vibrate, the first piezoelectric bead 112a continuously shakes along the first direction due to the vibration. The second piezoelectric bead 112b continuously shakes along the second direction due to the vibration, and the first piezoelectric bead 112a and the second piezoelectric bead 112b can shake in different directions respectively, thereby impacting the activated water and lithium electrode powder from different directions, which is beneficial to further improve the reaction activity of water and lithium electrode powder, and further promote the dissolution of lithium element in water.

[0068] Optionally, Figure 3 FIG. 1 is a partial schematic diagram of the first piezoelectric bead 112 a installed on the first bead member 111 a according to an embodiment of the present disclosure. Figure 4 FIG. 1 is a partial schematic diagram of the second piezoelectric bead 112b installed on the second bead member 111b according to the embodiment of the present disclosure. Figure 3 and Figure 4 , the first beaded member 111a is provided with a plurality of first recessed portions 1101a arranged at intervals along its extension direction (length direction), and a plurality of the first piezoelectric beads 112a are confined one-to-one to the region where the plurality of the first recessed portions 1101a are located, so that each of the first piezoelectric beads 112a has an independent active region. The second beaded member 111b is provided with a plurality of second recessed portions 1101b arranged at intervals along its extension direction (length direction), and a plurality of the second piezoelectric beads 112b are confined one-to-one to the region where the plurality of the second recessed portions 1101b are located, so that each of the second piezoelectric beads 112b has an independent active region. Thus, under a vibration environment, each of the first piezoelectric beads 112a can move in correspondence with each of the first recessed portions 1101a and is difficult to cross the first recessed portions 1101a, so that each of the first piezoelectric beads 112a has an independent active region. Each of the second piezoelectric beads 112 b can move in a corresponding second recessed portion 1101 b and is difficult to cross the second recessed portion 1101 b , so that each of the second piezoelectric beads 112 b has an independent active area.

[0069] Figure 5 FIG. 1 is a front view of a device 10 for extracting lithium from a lithium electrode according to an embodiment of the present disclosure. Figure 2 and Figure 5, the first bead mesh layer 11a and the second bead mesh layer 11b are both multiple, and the multiple first bead mesh layers 11a and the multiple second bead mesh layers 11b are staggered in the vertical direction, and the two first piezoelectric beads 112a respectively included in the adjacent two first bead mesh layers 11a are staggered in the horizontal direction, and the two second piezoelectric beads 112b respectively included in the adjacent two second bead mesh layers 11b are staggered in the horizontal direction. Thus, the multiple first piezoelectric beads 112a of the two adjacent layers can further increase the contact area between water and lithium electrode powder and the piezoelectric material, and prolong the contact time, and the multiple second piezoelectric beads 112b of the two adjacent layers can further increase the contact area between water and lithium electrode powder and the piezoelectric material, and prolong the contact time, which is beneficial to improving the lithium extraction effect.

[0070] Figure 6 It is a schematic structural diagram of the lithium extraction reaction device 900 of the lithium electrode according to an embodiment of the present disclosure. Figure 7 Schematic diagram of the structure of the lithium electrode lithium extraction reaction device 900 when cut open. Figure 6 and Figure 7 The lithium extraction reaction equipment 900 provided in the present disclosure includes the device 10 for extracting lithium from a lithium electrode as described above and a reaction shell 91. The reaction shell 91 is provided with a reaction chamber 9101 for accommodating the device 10 for extracting lithium from a lithium electrode, and a feed port 9102 and a water inlet 9103 connected to the reaction chamber 9101, and the feed port 9102 is used for introducing lithium electrode powder. The ultrasonic vibrator 92 is used to drive the device 10 for extracting lithium from a lithium electrode to vibrate using ultrasonic waves, so that the piezoelectric beads are ultrasonically vibrated.

[0071] Optionally, the ultrasonic vibrator 92 includes an ultrasonic generator 921 and an ultrasonic transducer 922. The ultrasonic generator 921 is used to generate and control a high-frequency electrical signal. The ultrasonic transducer 922 is used to convert the high-frequency electrical signal into an ultrasonic wave, thereby driving the device 10 for extracting lithium from a lithium electrode to generate violent mechanical vibrations under the action of the ultrasonic wave.

[0072] Optionally, the lithium extraction reaction equipment 900 further includes a water level detector 96. The water level detector 96 is disposed above the device 10 for extracting lithium from the lithium electrode to detect whether water submerges the device 10 for extracting lithium from the lithium electrode. Thus, when the water level reaches the position of the water level detector 96, the water level is located above the device 10 for extracting lithium from the lithium electrode, which is conducive to ensuring that the water submerges the device 10 for extracting lithium from the lithium electrode.

[0073] Figure 8 FIG. 1 is a schematic diagram of the arrangement of some electronic components of an embodiment of the present disclosure. Figure 7 and Figure 8The lithium extraction reaction device 900 further includes a control unit 97 and an ultrasonic vibrator 92. The control unit 97 is connected to the ultrasonic vibrator 92 and the water level detector 96, respectively, and is used to control the ultrasonic vibrator 92 to start when it is determined that water submerges the device 10 for extracting lithium from lithium electrodes.

[0074] Optionally, a feed valve 98 is further provided at the feed port 9102 of the lithium electrode lithium extraction reaction device 900. The control unit 97 is respectively connected to the feed valve 98 and the water level detector 96 to control the feed valve 98 to open for feeding when it is determined that water submerges the device 10 for extracting lithium from lithium electrodes.

[0075] Thus, when the lithium electrode lithium extraction reaction equipment 900 is working, water first passes into the reaction chamber 9101 through the water inlet 9103 until the water submerges the device 10 for lithium electrode lithium extraction. At this time, the ultrasonic vibrator 92 is turned on, and the lithium electrode powder is passed into the reaction chamber 9101 through the feed port 9102. Thus, during the feeding process of the feed port 9102 and for a period of time after the feeding is completed, when the piezoelectric beads vibrate under the action of ultrasonic waves, the piezoelectric beads can effectively promote the dissolution of lithium elements in water, thereby improving the efficiency of lithium extraction.

[0076] Optionally, the reaction housing 91 is provided with a filter chamber 9104 communicating with the reaction chamber 9101 and a lithium liquid outlet 9105 communicating with the filter chamber 9104 .

[0077] The lithium electrode lithium extraction reaction equipment 900 also includes a separator 93 and a filter 94. The separator 93 can be movably arranged between the reaction chamber 9101 and the filter chamber 9104 to separate the reaction chamber 9101 and the filter chamber 9104. When the separator 93 moves to the conducting position, the reaction chamber 9101 and the filter chamber 9104 are connected. The filter 94 is arranged in the filter chamber 9104 to filter the solid slag formed after lithium extraction.

[0078] Thus, when the lithium electrode extraction reaction equipment 900 extracts lithium from the lithium electrode powder in water, the separator 93 is in a position to separate the reaction chamber 9101 and the filter chamber 9104, so that the lithium element in the lithium electrode powder is fully dissolved in water and solid slag is generated. For example, when the lithium electrode powder is lithium iron phosphate, solid iron phosphate slag is generated after lithium extraction. After the piezoelectric lithium extraction process is completed, the separator 93 moves to connect the reaction chamber 9101 and the filter chamber 9104, so that the reacted lithium solution and solid slag pass into the filter chamber 9104. Thus, after filtering, the solid slag is intercepted by the filter screen 94, and the lithium solution flows out through the lithium liquid outlet 9105, thereby removing the solid slag in the lithium solution after lithium extraction.

[0079] Optionally, the partition 93 is provided between the reaction chamber 9101 and the filter chamber 9104 in a pullable manner. It is understandable that, in order to smoothly pull the partition 93, the housing 91 may be provided with a slide groove that slidably cooperates with the partition 93. Thus, when the partition 93 is pulled outward, the reaction chamber 9101 and the filter chamber 9104 are connected through the conduction port 9107. When the partition 93 is pushed inward and closes the conduction port 9107, the reaction chamber 9101 and the filter chamber 9104 are separated, and the operation is convenient.

[0080] Optionally, the reaction chamber 9101 is disposed above the filter chamber 9104, and the partition 93 can be horizontally pulled out between the filter chamber 9104 and the reaction chamber 9101. Thus, after the piezoelectric lithium extraction process is completed, when the partition 93 is horizontally pulled outward, the reacted lithium solution and solid slag can be passed into the filter chamber 9104 under the action of gravity. When the partition 93 is horizontally pushed inward, the reaction chamber 9101 and the filter chamber 9104 are separated.

[0081] Optionally, the filter screen 94 is tilted, and the reaction housing 91 is provided with a slag outlet 9106 corresponding to the lower end of the filter screen 94. Thus, after the solid slag is intercepted by the filter screen 94, the solid slag can slide from top to bottom on the filter screen 94 under the action of gravity, so as to be accumulated at the lower end of the filter screen 94 and discharged through the slag outlet 9106 corresponding to the lower end of the filter screen 94.

[0082] Optionally, a guide portion 912 located below the device 10 for extracting lithium from a lithium electrode is provided in the reaction housing 91, and the guide portion 912 has an inclined guide surface 9121, and the lower end of the guide surface 9121 is provided for overlapping the separator 93. Thus, when the separator 93 is pulled out, the material after lithium extraction can slide toward the conducting port 9107 between the filter chamber 9104 and the reaction chamber 9101 under the guidance of the guide portion 912, thereby facilitating the material after lithium extraction to smoothly enter the filter chamber 9104.

[0083] Optionally, the lithium electrode lithium extraction reaction equipment 900 further includes a discharge gate 95. The discharge gate 95 is movably disposed at the slag outlet 9106 to open / close the slag outlet 9106. Thus, when there is no need to discharge solid slag, the discharge gate 95 is located at a position to close the slag outlet 9106. When it is necessary to discharge solid slag, the discharge gate 95 moves to a position to open the slag outlet 9106, so that the solid slag can be discharged smoothly through the slag outlet 9106.

[0084] Fig. 9 yes Figure 7 A magnified schematic diagram of part A in Figure 2. Figure 7 and Fig. 9 , the filter screen 94 includes a screen frame 941 and at least one screen element 942. The screen frame 941 is positioned in the filter cavity 9104 and forms at least one interlocking groove 9401. The screen element 942 is detachably disposed in the interlocking groove 9401. For example, the screen element 942 may be in the shape of a hard plate or a soft mesh. When solid slag enters the filter cavity 9104 and hits the filter screen 94, the impact force of the solid slag on the filter screen 94 is relatively large, which may easily cause the filter screen 94 to be damaged. Since the screen element 942 is detachably disposed in the interlocking groove 9401, it is convenient to replace the screen element 942 when it is damaged.

[0085] Specifically, there are multiple fitting grooves 9401 and multiple screen members 942, and multiple screen members 942 are arranged in multiple fitting grooves 9401 in a one-to-one correspondence. Therefore, when any of the screen members 942 is damaged, the corresponding screen member 942 can be replaced, which is conducive to reducing replacement costs.

[0086] Optionally, the screen member 942 is a polyurethane screen member. The polyurethane screen member has good anti-smashing performance and is difficult to be damaged.

[0087] Optionally, see Figure 7 The reaction shell 91 is also formed with a material blocking portion 911, which is arranged corresponding to the slag outlet 9106 to form a discharge port 91101 communicating with the slag outlet 9106 with the lower adjacent wall of the slag outlet 9106. Therefore, the solid slag discharged from the slag outlet 9106 will enter the inside of the material blocking portion 911 and be discharged downward from the discharge port 91101. The solid slag is easy to discharge and is difficult to splash outward, which is conducive to avoiding pollution of the external environment.

[0088] For example, when the solid-liquid ratio of lithium iron phosphate electrode powder and water is 10 g / L to 50 g / L, the mixture containing lithium iron phosphate electrode powder and water is added into the mixture of the present application. Figure 7 The interior of the device 10 for extracting lithium from a lithium electrode is shown as follows: Figure 7 As shown, Figure 7 The arrangement of the multiple bead mesh layers inside the device 10 for extracting lithium from a lithium electrode is shown as follows: Figure 1 and Figure 2As shown, the plurality of bead net layers have the first bead net layers 11a and the second bead net layers 11b arranged in an interlaced manner in the vertical direction, and the plurality of the first bead net layers 11a and the plurality of the second bead net layers 11b are arranged in an interlaced manner in the vertical direction, and the two adjacent first bead net layers 11a respectively have two first piezoelectric beads 112a arranged in an interlaced manner in the horizontal direction, and the two adjacent second bead net layers 11b respectively have two second piezoelectric beads 112b arranged in an interlaced manner in the horizontal direction. At the same time, the device reacts for 2min~14min under an ultrasonic power of 60W-2000W, and after filtering out the filtrate through the lithium liquid outlet 9105 at the bottom, the lithium content and iron content in the filtrate (i.e., the leachate) are determined by inductively coupled plasma spectroscopy (ICP-OES) and the leaching rate is converted. The lithium leaching rate can reach 80.92%~99.86%. The specific corresponding element leaching rates are shown in Table 1 below. It can also be seen from Table 1 below that the device of the present application has a good lithium extraction effect.

[0089]

[0090] The above embodiments are merely illustrative of the principles and effects of the present disclosure, and are not intended to limit the present disclosure. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present disclosure. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed in the present disclosure shall still be covered by the protection scope of the present disclosure.

Claims

1. A device for extracting lithium from a lithium electrode, characterized in that: Used to be immersed in a mixed material, wherein the mixed material includes water and lithium electrode powder, and the device for extracting lithium from the lithium electrode includes: At least one bead mesh layer, including a plurality of bead string components arranged in parallel or in a mesh, each of the bead string components including a plurality of piezoelectric beads sleeved on a bead string member and arranged at intervals, and the piezoelectric beads form charge movement that promotes the precipitation of lithium ions under the friction between water and lithium electrode powder and ultrasonic cavitation; the piezoelectric beads are movably arranged on the bead string member, and the bead string member forms an independent active area for each piezoelectric bead; The beaded piece is provided with a plurality of recessed parts arranged at intervals along the extension direction, and the plurality of piezoelectric beads are movable and confined one by one in the areas where the plurality of recessed parts are located.

2. The device for extracting lithium from a lithium electrode according to claim 1, characterized in that: The piezoelectric beads are arranged movably along the bead member and / or rotatably around the bead member.

3. The device for extracting lithium from a lithium electrode according to claim 1, characterized in that: The bead mesh layers are multiple, and the multiple bead mesh layers include: The first bead mesh layer includes a plurality of first bead string components, each of which includes a plurality of first piezoelectric beads sleeved on the first bead string component and spaced apart along the first direction; The second bead mesh layer is arranged in the up-down direction with the first bead mesh layer, and includes a plurality of second bead string components, each of the second bead string components includes a plurality of second piezoelectric beads which are sleeved on the second bead string component and spaced apart along the second direction, the second direction is different from the first direction, and the first piezoelectric beads and the second piezoelectric beads respectively provided on the adjacent first bead mesh layer and the second bead mesh layer are staggered in the horizontal plane.

4. The device for extracting lithium from a lithium electrode according to claim 3, characterized in that: There are multiple first bead mesh layers and multiple second bead mesh layers, and the multiple first bead mesh layers and the multiple second bead mesh layers are staggered in the up and down direction, and the two first piezoelectric beads respectively included in two adjacent first bead mesh layers are staggered, and the two second piezoelectric beads respectively included in two adjacent second bead mesh layers are staggered.

5. The device for extracting lithium from a lithium electrode according to claim 1, characterized in that: There are multiple bead mesh layers, which are arranged in the up-down direction, and the piezoelectric beads are spherically arranged.

6. Lithium electrode lithium extraction reaction equipment, characterized in that: include: The device for extracting lithium from a lithium electrode as claimed in any one of claims 1 to 5; A reaction shell, provided with a reaction chamber for accommodating the device for extracting lithium from a lithium electrode, and a feed inlet and a water inlet communicated with the reaction chamber, wherein the feed inlet is used for introducing lithium electrode powder; The ultrasonic vibrator is used for outputting ultrasonic waves to drive the device to vibrate, so that the piezoelectric beads are ultrasonically vibrated.

7. The lithium electrode lithium extraction reaction equipment according to claim 6, characterized in that: The reaction housing is provided with a filter chamber communicated with the reaction chamber and a lithium liquid outlet communicated with the filter chamber; The lithium electrode lithium extraction reaction equipment also includes: a partition, which is movably disposed between the reaction chamber and the filter chamber to separate the reaction chamber and the filter chamber; and when the partition moves to a conducting position, the reaction chamber and the filter chamber are conducted; The filter screen is arranged in the filter cavity and is used for filtering the solid slag formed after lithium extraction.

8. The lithium electrode lithium extraction reaction equipment according to claim 7, characterized in that: The filter screen comprises a screen frame and at least one screen element, the screen frame is positioned in the filter cavity and forms at least one engaging groove; the screen element is detachably arranged in the engaging groove; and / or The filter screen is arranged obliquely, and the reaction housing is provided with a slag outlet corresponding to the lower end of the filter screen; The lithium electrode lithium extraction reaction equipment also includes: a discharge gate, which is movably arranged at the slag outlet to open / close the slag outlet.

9. The lithium electrode lithium extraction reaction equipment according to claim 6, characterized in that: Also includes: A water level detector is arranged above the device for extracting lithium from the lithium electrode to detect whether water submerges the device for extracting lithium from the lithium electrode.

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